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UNITED STATES

SECURITIES AND EXCHANGE COMMISSION

Washington, D.C. 20549

FORM 10-K

(Mark One)

For the fiscal year ended December 31, 2025

OR

Commission File Number 001-40360

Definium Therapeutics, Inc.

(Exact name of Registrant as specified in its Charter)

Registrant’s telephone number, including area code: (212) 220-6633

Securities registered pursuant to Section 12(b) of the Act:

Securities registered pursuant to Section 12(g) of the Act: None

Indicate by check mark if the Registrant is a well-known seasoned issuer, as defined in Rule 405 of the Securities Act. Yes ☒ No ☐

Indicate by check mark if the Registrant is not required to file reports pursuant to Section 13 or 15(d) of the Act. Yes ☐ No ☒

Indicate by check mark whether the Registrant: (1) has filed all reports required to be filed by Section 13 or 15(d) of the Securities Exchange Act of 1934 during the preceding 12 months (or for such shorter period that the Registrant was required to file such reports), and (2) has been subject to such filing requirements for the past 90 days. Yes ☒ NO ☐

Indicate by check mark whether the Registrant has submitted electronically every Interactive Data File required to be submitted pursuant to Rule 405 of Regulation S-T (§232.405 of this chapter) during the preceding 12 months (or for such shorter period that the Registrant was required to submit such files). Yes ☒ NO ☐

Indicate by check mark whether the registrant is a large accelerated filer, an accelerated filer, a non-accelerated filer, smaller reporting company, or an emerging growth company. See the definitions of “large accelerated filer,” “accelerated filer,” “smaller reporting company,” and “emerging growth company” in Rule 12b-2 of the Exchange Act.

If an emerging growth company, indicate by check mark if the registrant has elected not to use the extended transition period for complying with any new or revised financial accounting standards provided pursuant to Section 13(a) of the Exchange Act. ☐

Indicate by check mark whether the registrant has filed a report on and attestation to its management’s assessment of the effectiveness of its internal control over financial reporting under Section 404(b) of the Sarbanes-Oxley Act (15 U.S.C. 7262(b)) by the registered public accounting firm that prepared or issued its audit report. ☐

If securities are registered pursuant to Section 12(b) of the Act, indicate by check mark whether the financial statements of the registrant included in the filing reflect the correction of an error to previously issued financial statements. ¨

Indicate by check mark whether any of those error corrections are restatements that required a recovery analysis of incentive-based compensation received by any of the registrant’s executive officers during the relevant recovery period pursuant to § 240.10D-1(b). ¨

Indicate by check mark whether the Registrant is a shell company (as defined in Rule 12b-2 of the Exchange Act). Yes ☐ No ☒

As of June 30, 2025, the aggregate market value of the Registrant's common shares held by non-affiliates of the Registrant was $487.7 million based on the closing price of the Registrant's common shares, as reported by the Nasdaq Stock Market, on such date.

The number of the Registrant’s common shares outstanding as of February 19, 2026 was 99,698,129.

TABLE OF CONTENTS

Page

Unless otherwise noted or the context indicates otherwise, references in this Annual Report on Form 10-K (this “Annual Report”) to the “Company,” “Definium,” “we,” “us,” and “our” refer to Definium Therapeutics, Inc. (formerly Mind Medicine (MindMed) Inc.) and its consolidated subsidiaries.

This report contains references to our trademarks and trade names and to trademarks and trade names belonging to other entities. Solely for convenience, trademarks and trade names referred to in this report may appear without the ® or ™ symbols, but such references are not intended to indicate, in any way, that their respective owners will not assert, to the fullest extent under applicable law, their rights thereto. We do not intend our use or display of other companies’ trademarks or trade names to imply a relationship with, or endorsement or sponsorship of us or our business by, any other companies.

All currency amounts in this Annual Report are stated in United States dollars, which is our reporting currency, unless otherwise noted. All references to “dollars” or “$” are to United States dollars and all references to “CAD$” are to Canadian dollars.

Special Note Regarding Forward-Looking Statements

This Annual Report contains forward-looking statements about us and our industry that involve substantial risks and uncertainties. All statements other than statements of historical facts contained in this Annual Report, including statements regarding our future results of operations or financial condition, business strategy and plans and objectives of management for future operations, are forward-looking statements. In some cases, you can identify forward-looking statements because they contain words such as “anticipate,” “believe,” “contemplate,” “continue,” “could,” “estimate,” “expect,” “intend,” “may,” “plan,” “potential,” “predict,” “project,” “should,” “target,” “will” or “would” or the negative of these words or other similar terms or expressions. These forward-looking statements include, but are not limited to, statements concerning the following:

You should not rely on forward-looking statements as predictions of future events. The results, events and circumstances reflected in forward-looking statements may not be achieved or occur, and actual results, events or circumstances could differ materially from those described in the forward-looking statements. We have based the forward-looking statements contained in this Annual Report primarily on our current expectations and projections about future events and trends that we believe may affect our business, financial condition and operating results. Management’s beliefs and assumptions, including the non-occurrence of the risks and uncertainties described in this Annual Report or other significant events occurring outside of our normal course of business, are not guarantees of future performance or development and involve known and unknown risks, uncertainties and other factors that are in some cases beyond our control. As a result, any or all of our forward-looking statements may turn out to be inaccurate. The outcome of the events described in these forward-looking statements is subject to risks, uncertainties and other factors described in the sections titled “Risk Factors,” “Management’s Discussion and Analysis of Financial Condition and Results of Operations” and elsewhere in this Annual Report. Moreover, we operate in a very competitive and rapidly changing environment. New risks and uncertainties emerge from time to time, and it is not possible for us to predict all risks and uncertainties that could have an impact on the forward-looking statements contained in this Annual Report.

In addition, statements that “we believe” and similar statements reflect our beliefs and opinions on the relevant subject. These statements are based on information available to us as of the date of this Annual Report. And while we believe that information provides a reasonable basis for these statements, that information may be limited or incomplete. Our statements should not be read to indicate that we have conducted an exhaustive inquiry into, or review of, all relevant information. These statements are inherently uncertain, and investors are cautioned not to unduly rely on these statements.

The forward-looking statements made in this Annual Report relate only to events as of the date on which the statements are made. We undertake no obligation to update any forward-looking statements made in this Annual Report to reflect events or circumstances after the date of this Annual Report or to reflect new information or the occurrence of unanticipated events, except as required by law. We may not actually achieve the plans, intentions or expectations disclosed in our forward-looking statements, and you should not place

undue reliance on our forward-looking statements. Our forward-looking statements do not reflect the potential impact of any future acquisitions, mergers, dispositions, joint ventures or investments.

We may announce material business and financial information to our investors using our investor relations website (https://ir.definiumtx.com/). We therefore encourage investors and others interested in our company to review the information that we make available on our website, in addition to following our filings with the Securities and Exchange Commission and Canadian securities regulators, webcasts, press releases and conference calls. Our website and information included in or linked to our website are not part of this Annual Report.

Summary of Selected Risk Factors

The following is a summary of the principal risks associated with an investment in our common shares:

PART I

Item 1. Business.

Overview

We are a late-stage clinical biopharmaceutical company developing novel product candidates to treat brain health disorders. Our mission is to forge a new era of psychiatry by applying scientific rigor to psychedelics, with the goal of developing accessible treatments that unlock healing at scale. We are developing a pipeline of innovative product candidates targeting neurotransmitter pathways that play key roles in brain health disorders. This specifically includes pharmaceutically optimized product candidates derived from the psychedelic and empathogen drug classes including DT120 (previously referred to as MM120), and DT402 (previously referred to as MM402), our lead product candidates.

Our first lead product candidate, DT120 ODT, is a proprietary, pharmaceutically optimized form of lysergide D-tartrate that we are developing for the treatment of adults with generalized anxiety disorder and major depressive disorder. In December 2023, we announced positive topline results from our Phase 2b clinical trial of DT120 for the treatment of GAD. The trial met its primary endpoint, with DT120 demonstrating statistically significant and clinically meaningful dose-dependent improvements on the Hamilton Anxiety Rating Scale ("HAM-A") compared to placebo at Week 4. In March 2024, we announced that the U.S. Food and Drug Administration ("FDA") granted breakthrough designation to our DT120 program for the treatment of GAD. We also announced in March 2024 that our Phase 2b clinical trial of DT120 in GAD met its key secondary endpoint, and 12-week topline data demonstrated clinically and statistically significant durability of activity observed through Week 12. In September 2025, we announced that the full results from our Phase 2b clinical trial of DT120 in GAD had been published in the Journal of the American Medical Association.

In June 2024, we announced the completion of our End-of-Phase 2 meeting with the FDA, supporting the advancement of DT120 into pivotal trials for the treatment of adults with GAD. Our Phase 3 clinical program for DT120 ODT is expected to consist of two clinical trials: the Voyage study (DT120-300) and the Panorama study (DT120-301). Both trials are comprised of two parts: Part A, which is a 12-week, randomized, double-blind, placebo-controlled, parallel-group trial assessing the efficacy and safety of DT120 ODT versus placebo; and Part B, which is a 40-week extension period during which participants will be eligible for open-label treatment with DT120 ODT, subject to certain conditions for treatment eligibility. Voyage is anticipated to enroll approximately 200 participants (randomized 1:1 to receive DT120 ODT 100 µg or placebo) and Panorama is anticipated to enroll approximately 250 participants (randomized 2:1:2 to receive DT120 ODT 100 µg, DT120 ODT 50 µg or placebo). Both trials use an adaptive trial design with a blinded interim sample size re-estimation (“SSRE”), allowing for an increase in sample size by up to 50% in each trial depending on the observed values for certain nuisance parameters. The SSRE for Voyage has been completed and it was determined that no increase in the sample size of the trial is required. The primary endpoint for each trial is the change from baseline in HAM-A score at Week 12 between DT120 ODT 100 µg and placebo. In December 2024, we announced the initiation of Voyage, and we anticipate a topline readout (Part A results) in early third quarter 2026. In January 2025, we announced the initiation of Panorama, with an anticipated topline readout (Part A results) in the second half of 2026.

In addition to our Phase 3 clinical program for GAD, we are developing DT120 ODT for the treatment of adults with MDD. In the first quarter of 2024, we held a pre-IND meeting with FDA to discuss the initiation of our Phase 3 clinical program for DT120 ODT in MDD and the trial design for the Emerge study (DT120-310), which like our pivotal trials in GAD, we anticipate will be comprised of two parts: Part A, which is a 12-week, randomized, double-blind, placebo-controlled, parallel group trial assessing the efficacy and safety of DT120 ODT versus placebo; and Part B, which is a 40-week extension period during which participants will be eligible for open-label treatment with DT120 ODT, subject to certain conditions for treatment eligibility. Emerge is fully enrolled with 149 participants randomized 1:1 to receive DT120 ODT 100 µg or placebo. The primary endpoint is the change from baseline in Montgomery Åsberg Depression Rating Scale ("MADRS") score at Week 6 between DT120 ODT 100 µg and placebo. In April 2025, we announced the initiation of Emerge, and we anticipate a topline readout (Part A results) in late second quarter 2026.

We activated initial sites in our second Phase 3 clinical trial of DT120 ODT in MDD, Ascend (DT120-311), in the first quarter of 2026 and we expect to dose our first patient in this trial by early second quarter 2026. Ascend has a similar design to Emerge, with a 12-week, randomized, double-blind, placebo-controlled, parallel group design assessing the efficacy and safety of DT120 ODT versus placebo (Part A); and Part B, which includes a 40-week extension period during which participants will be eligible for open-label treatment with DT120 ODT. Ascend is anticipated to enroll approximately 175 participants (randomized 2:1:2 to receive DT120 ODT 100 µg, DT120 ODT 50 µg or placebo). The primary endpoint is the change from baseline in MADRS score at Week 6 between DT120 ODT 100 µg and placebo.

Our second lead product candidate, DT402 (previously referred to as MM402), also referred to as R(-)-MDMA, is our proprietary form of the R-enantiomer of 3,4-methylenedioxymethamphetamine (“MDMA”), which we are developing for the treatment of adults with autism spectrum disorder (“ASD”). MDMA is a synthetic molecule that is often referred to as an empathogen because it is reported

to increase feelings of connectedness and compassion. Preclinical studies of R(-)-MDMA demonstrated its acute pro-social and empathogenic effects, while its diminished dopaminergic activity suggests that it has the potential to exhibit less stimulant activity, neurotoxicity, hyperthermia and abuse liability compared to racemic MDMA or the S(+)-enantiomer. In October 2024, we completed our first clinical trial of DT402, a single-ascending dose trial in adult healthy volunteers. The data from this Phase 1 clinical trial helped to characterize the tolerability, pharmacokinetics and pharmacodynamics of DT402.

We initiated a Phase 2a trial of DT402 in ASD in the fourth quarter of 2025. This study is a single-dose, open-label study to assess early signals of efficacy of DT402 in treating core socialization and communication symptoms in adults with ASD. This study is anticipated to enroll up to 20 participants. The objectives and endpoints of the study are designed to characterize the pharmacodynamics and clinical effects of DT402 in adults with ASD, including on multiple functional biomarkers. We anticipate initial data from our Phase 2a study in 2026.

Beyond our clinical stage product candidates, we are exploring additional programs, including through external collaborations, which we seek to expand our drug development pipeline and broaden the potential applications of our lead product candidates. These research and development programs include non-clinical, pre-clinical and human clinical trials of current and new product candidates and research compounds with our collaborators.

Our business is premised on a growing body of research supporting the use of novel psychoactive compounds to treat a myriad of brain health disorders. For all product candidates, we intend to proceed through research and development, and with marketing of the product candidates that may ultimately be approved pursuant to the regulations of the FDA and the regulations in other jurisdictions. This entails, among other things, conducting clinical trials with research scientists, using internal and external clinical drug development teams, producing and supplying product candidates according to current Good Manufacturing Practices (“cGMP”), and conducting all trials and development in accordance with the regulations of the FDA, and other regulations in other jurisdictions.

On January 9, 2026, we changed our corporate name from Mind Medicine (MindMed) Inc. to Definium Therapeutics, Inc. On January 12, 2026, we changed the name of our wholly-owned subsidiary from Mind Medicine, Inc. to Definium Therapeutics US, Inc. ("Definium US"). In connection with our rebrand, we began trading on Nasdaq under the symbol “DFTX” on January 15, 2026.

We were incorporated under the laws of the Province of British Columbia in 2010. Our wholly-owned subsidiary, Definium US, was incorporated in Delaware in 2019. Prior to February 27, 2020, our operations were conducted through Definium US.

Our Strategy

Our mission is to forge a new era of psychiatry by applying scientific rigor to psychedelics, with the goal of developing accessible treatments that unlock healing at scale. We intend to accomplish our mission by leading in psychedelic research and development, commercialization and patient access, with a focus on completing our Phase 3 clinical trials of DT120 ODT in GAD and MDD. Key elements of our strategy are to:

Our Product Candidate Pipeline

The following table summarizes the status of our portfolio of product candidates:

1.Formerly known as MM120; USAN: lysergide tartrate.

2.Formerly known as MM402.

3.Full trial details and clinicaltrials.gov links available at definiumtx.com/clinical-digital-trials/

4.Studies in exploration and/or planning stage.

ODT: orally disintegrating tablet; R(-)-MDMA: rectus-3,4-methylenedioxymethamphetamine

Lysergide tartrate (DT120)

Lysergide tartrate, or DT120, is our proprietary product candidate, a pharmaceutically optimized form of lysergide D-tartrate being developed for GAD, MDD and other brain health disorders. Lysergide was first synthesized in 1938 and its psychoactive properties were discovered in 1943. From 1949 to 1966, lysergide was used by psychiatrists and researchers to gain insights into the world of psychiatry. The precise mechanism by which lysergide modulates anxiety and depression is still under investigation, but recent neuroimaging studies have provided a plausible explanation for clinical efficacy in these disease areas. Lysergide increases functional connectivity between various brain regions and increases measures of functional ‘brain entropy’ across many functional systems. This increase in connectivity between brain regions is correlated with perceptual alterations that are believed to contribute to subsequent and persistent improvements in psychological functioning. Acute and persistent reconfiguration of brain networks by lysergide—particularly prefrontal and default mode network regions— may represent systems-level mechanisms underlying its therapeutic effects in anxiety, depression and other brain health disorders. Lysergide has been investigated for its applications in the treatment of anxiety associated with terminal cancer, depression, alcohol use disorder, and opioid use disorder, among other conditions.

General Anxiety Disorder (GAD)

GAD is a chronic, often debilitating mental health disorder that affects approximately 10% of U.S. adults in their lifetimes. Symptoms of GAD include excessive anxiety and worry that persists for over six months, which can lead to significant impairments in social, occupational and other functioning, according to the National Institute of Mental Health. While there is substantial diagnostic overlap between GAD, MDD, and other major brain health disorders, there has been very little innovation focused on the treatment of GAD in the past several decades due to the shift in focus from anxiety disorders, like GAD, toward depressive disorders, like MDD.

In December 2023, we announced positive topline results from our Phase 2b clinical trial of DT120 for the treatment of GAD. The trial met its primary endpoint, with DT120 demonstrating statistically significant and clinically meaningful dose-dependent improvements on the HAM-A scale compared to placebo at Week 4. DT120 was administered as a single-dose in a monitored clinical setting with no additional therapeutic intervention. DT120 100 µg - the dose achieving the highest level of clinical activity - demonstrated a 7.6-point reduction compared to placebo at Week 4 (-21.3 DT120 vs. -13.7 placebo; p<0.0004; Cohen’s d=0.88). Clinical Global Impressions-Severity (“CGI-S”) scores on average improved from 4.8 to 2.4 in the 100 µg dose group, representing a two-category shift from ‘markedly ill’ to ‘borderline ill’ at Week 4 (p<0.001). This clinical activity was observed to be rapid and durable beginning on Day 2 and continuing through Week 4 with no loss.

In March 2024, we announced that the FDA granted breakthrough designation to our DT120 program for the treatment of GAD. We also announced in March 2024 that our Phase 2b trial of DT120 in GAD met its key secondary endpoint, and 12-week topline data demonstrated clinically and statistically significant durability of activity observed through Week 12. DT120 100µg—the dose with optimal clinical activity observed in the trial—demonstrated a 7.7-point improvement over placebo at Week 12 (-21.9 DT120 vs. -14.2 placebo; p<0.003 Cohen’s d=0.81), with a 65% clinical response rate and a 48% clinical remission rate sustained to Week 12. Clinical Global Impressions -Severity (CGI-S) scores on average improved from 4.8 to 2.2 in the 100µg dose group, representing a two-category shift from ‘markedly ill’ to ‘borderline ill’ at Week 12 (p<0.004). This clinical activity was rapid, observed as early as trial day 2, and durable with further improvements observed in mean HAM-A or CGI-S scores between Weeks 4 and 12.

In the Phase 2b trial, DT120 was generally well-tolerated with most adverse events mild to moderate, transient and primarily occurring on dosing day, consistent with expected acute effects of the study drug. The most common adverse events, with at least 10% incidence on dosing day in the 100 µg dose group, included illusion, nausea, headache, hallucination, euphoric mood, anxiety, mydriasis, hyperhidrosis, paresthesia, fatigue, blood pressure increase, abnormal thinking, and altered state of consciousness.

Prior to treatment with DT120, trial participants were clinically tapered and then washed out from any anxiolytic or antidepressant treatments and did not receive any form of study-related psychotherapy for the duration of their participation in the trial.

In June 2024, we announced the completion of our End-of-Phase 2 meeting with the FDA, supporting the advancement of DT120 ODT into pivotal trials for the treatment of adults with GAD. Our Phase 3 clinical program for DT120 ODT is expected to consist of two clinical trials: the Voyage study (DT120-300) and the Panorama study (DT120-301). Both trials are comprised of two parts: Part A, which is a 12-week, randomized, double-blind, placebo-controlled, parallel-group trial assessing the efficacy and safety of DT120 ODT versus placebo; and Part B, which is a 40-week extension period during which participants will be eligible for open-label treatment with DT120 ODT, subject to certain conditions for treatment eligibility. Voyage is anticipated to enroll approximately 200 participants (randomized 1:1 to receive DT120 ODT 100 µg or placebo) and Panorama is anticipated to enroll approximately 250 participants (randomized 2:1:2 to receive DT120 ODT 100 µg, DT120 ODT 50 µg or placebo). Both trials use an adaptive trial design with a blinded interim SSRE, allowing for an increase in sample size by up to 50% in each trial depending on the observed values for certain nuisance parameters. The SSRE for Voyage has been completed and it was determined that no increase in the sample size of the trial is required. The primary endpoint for each trial is the change from baseline in HAM-A score at Week 12 between DT120 ODT 100 µg and placebo. In December 2024, we announced the initiation of Voyage, and we anticipate a topline readout (Part A results) in early third quarter 2026. In January 2025, we announced the initiation of Panorama with an anticipated topline readout (Part A results) in the second half of 2026.

In December 2024, we announced that DT120 ODT has been granted an Innovation Passport designation for the treatment of GAD under Innovative Licensing and Access Pathway (“ILAP”) by the UK. Medicines and Healthcare products Regulatory Agency (“MHRA”). The Innovation Passport is the entry point to the ILAP, which aims to accelerate time to market and facilitate patient access to medicines in the UK.

Major Depressive Disorder (MDD)

As of 2023, it was estimated that 15.5% of adults in the U.S. had experienced MDD in the previous twelve months - which is characterized by the occurrence of at least one major depressive episode ("MDE"). An MDE is defined by the presentation of five or more depressive symptoms, occurring for at least 2 weeks, and is the one of the most common mental health disorders in the U.S. Symptoms of MDD may include feelings of worthlessness, fatigue, impaired social functioning and recurrent thoughts of death. MDD is associated with significant morbidity and mortality, serious functional impairment, and reduced quality of life. MDD also leads to substantial economic burdens due to higher direct and indirect costs. For patients who experience an MDE, fewer than half will receive adequate or any pharmacotherapy. Among those treated, approximately two-thirds will not achieve remission from first line therapy.

In the first quarter of 2024, we held a pre-IND meeting with FDA to discuss the initiation of our Phase 3 clinical program for DT120 ODT in MDD and the trial design for the Emerge study (DT120-310), which like our pivotal trials in GAD, is comprised of two parts: Part A, which is a 12-week, randomized, double-blind, placebo-controlled, parallel group trial assessing the efficacy and safety of DT120 ODT versus placebo; and Part B, which is a 40-week extension period during which participants will be eligible for open-label treatment with DT120 ODT, subject to certain conditions for treatment eligibility. Emerge is fully enrolled with 149 participants randomized 1:1 to receive DT120 ODT 100 µg or placebo. The primary endpoint is the change from baseline in MADRS score at Week 6 between DT120 ODT 100 µg and placebo. In April 2025, we announced the initiation of Emerge, and we anticipate a topline readout (Part A results) in late second quarter 2026.

We activated initial sites in our second Phase 3 clinical trial of DT120 ODT in MDD, Ascend (DT120-311), in the first quarter of 2026 and we expect to dose our first patient in this trial by early second quarter 2026. Ascend has a similar design to Emerge, with a 12-week, randomized, double-blind, placebo-controlled, parallel group design assessing the efficacy and safety of DT120 ODT versus

placebo (Part A); and Part B, which includes a 40-week extension period during which participants will be eligible for open-label treatment with DT120 ODT. Ascend is anticipated to enroll approximately 175 participants (randomized 2:1:2 to receive DT120 ODT 100 µg, DT120 ODT 50 µg or placebo). The primary endpoint is the change from baseline in MADRS score at Week 6 between DT120 ODT 100 µg and placebo.

Given the highly comorbid nature of MDD and GAD, it is common to assess the impact on both depression and anxiety symptoms in clinical trials of either population. As such, in our Phase 2b GAD trial, one of the secondary endpoints was the change from baseline in depression symptoms (as measured by the MADRS score) at Week 6 between DT120 and placebo. In March of 2024, we announced that DT120 100 µg demonstrated statistically and clinically significant reductions in comorbid depressive symptoms, with a MADRS score improvement of 18.7 points from baseline to Week 12 - an improvement of 6.4 points as compared to placebo.

R(-)-MDMA (DT402)

R(-)-MDMA, or DT402, is our proprietary form of the R-enantiomer of MDMA, which we are developing for the treatment of ASD. MDMA is a synthetic molecule that is often referred to as an empathogen because it is reported to increase feelings of connectedness and compassion. R(-)-MDMA is thought to increase the levels of serotonin and, to a lesser extent, norepinephrine, and dopamine, in the brain, resulting in feelings of increased sociability and interpersonal emotional warmth. Preclinical studies of R(-)-MDMA demonstrated its acute pro-social and empathogenic effects, while its diminished dopaminergic activity suggest that it has the potential to exhibit less stimulant activity, neurotoxicity, hyperthermia and abuse liability compared to racemic MDMA or the S(+)-enantiomer. In October 2024, we completed our first clinical trial of DT402, a single-ascending dose trial in adult healthy volunteers. The data from this Phase 1 clinical trial helped to characterize the tolerability, pharmacokinetics and pharmacodynamics of DT402.

We initiated a Phase 2a trial of DT402 in ASD in the fourth quarter of 2025. This study is a single-dose, open-label study to assess early signals of efficacy of DT402 in treating core socialization and communication symptoms in adults with ASD. This study is anticipated to enroll up to 20 participants. The objectives and endpoints of the study are designed to characterize the pharmacodynamics and clinical effects of DT402 in adults with ASD, including on multiple functional biomarkers. We anticipate initial data from our Phase 2a study in 2026.

ASD is a biologically based neurodevelopmental disorder characterized by persistent deficits in social communication and social interaction, and restricted, repetitive patterns of behavior, interests, and activities. Estimates of the prevalence of ASD vary with study methodology and the population that is evaluated. The overall prevalence of ASD in Europe, Asia, and the United States ranges from 2 to 25 per 1000, or approximately 1 in 40 to 1 in 500. The pathogenesis of ASD is incompletely understood. The general consensus is that ASD is caused by genetic factors that alter brain development resulting in the neurobehavioral phenotype. Environmental and perinatal factors account for few cases of ASD but may modulate underlying genetic factors. Existing psychopharmacologic agents do not target the core symptoms of ASD and are largely oriented around treating coexisting psychiatric illnesses and reducing behavioral dysregulation.

Further Exploration of Novel Biopharmaceuticals and Other Areas of Interest

Beyond our lead product candidates, we have several additional programs, including through external collaborations, through which we seek to expand our drug development pipeline and broaden the potential application of our lead product candidates. These research programs include non-clinical, pre-clinical and human clinical trials of current and new product candidates and research compounds with our collaborators.

Manufacturing & Supply

DT120 and DT402 are small molecule active pharmaceutical ingredients isolated as stable crystalline solids. We believe the syntheses of these product candidates are reliable and reproducible from readily available starting materials, and the synthetic routes are amenable to large-scale manufacturing. We expect to continue to identify and develop product candidates that are amenable to cost-effective manufacturing at the facilities of many third-party contract development and manufacturing organizations (“CDMOs”). Whenever possible, we seek to develop proprietary forms of active pharmaceutical ingredients and/or novel formulations which could provide enhancements in the pharmaceutical profile of our product candidates, including for instance improvements in the stability, manufacturability, pharmacokinetics and/or pharmacodynamics profile of our product candidates.

We neither own nor operate, and currently have no plans to own or operate, any manufacturing facilities. We currently develop and source all of our clinical and non-clinical drug substance and drug product supply through several CDMOs on a purchase order basis under master service and quality agreements. We have also developed and sourced the proprietary formulations of our product candidates from CDMOs, and intend to source all of our future clinical supplies of our product candidates from CDMOs that comply with applicable cGMP.

While we seek to enhance our market protection strategy by identifying unique and/or proprietary methods of manufacturing and/or dosage forms and entering into exclusive long-term or commercial supply agreements, we do not currently have arrangements in place for either commercial supply or redundant supply of drug substance or drug product for our research compounds and product candidates. We intend to enter into a long-term supply agreement at the appropriate time for drug substance and drug product for each product candidate, as and if clinical development of our product candidates continues. We plan to mitigate potential commercial supply risks for any products that are approved in the future through inventory management and where possible, through exploring additional manufacturers or manufacturing sites to provide drug substance or drug product.

Through our third-party manufacturers, we have or intend to refine and scale up the manufacturing process for our product candidates and manufacture clinical and commercial supplies as our development program progresses and we prepare for potential commercialization. We believe we currently have sufficient drug substance for our ongoing trials and believe we will have access and steady supply of drug substance for our planned and future clinical trials.

Catalent

In August 2023, we announced an exclusive licensing agreement with Catalent for its patented Zydis® ODT technology. Under the terms of the licensing agreement, Catalent has granted us access to its Zydis technology for the development of DT120 ODT. The agreement also provides us with exclusive rights for the use of the Zydis technology to develop all known forms of lysergide in the United States, United Kingdom, and European Union among other key jurisdictions. Zydis ODT is a unique, freeze-dried, oral solid dosage form that disperses almost instantly in the mouth, without the need for water. Zydis is also recognized as one of the world’s best performing ODTs and has well-established advantages over conventional oral dosage forms, including improved patient compliance, adherence and convenience.

Research Collaborations

On April 1, 2020, we entered into a multi-year, exclusive collaboration with Dr. Matthias Liechti’s lab at UHB (the “UHB Liechti Lab”), a leading pharmacology and clinical research group studying psychedelic substances based in Basel, Switzerland. Pursuant to the agreement, we acquired exclusive worldwide rights to data, compounds, and patent rights associated with the UHB Liechti Lab’s research with lysergide and other psychedelic compounds, including data from preclinical studies and completed or ongoing clinical trials of lysergide and MDMA.

Pursuant to our agreement, we may support certain research programs, as well as certain clinical trials under the direction of Dr. Liechti. Dr. Liechti, as principal investigator, has primary responsibility for such research trials of the selected compounds. Subject to certain terms and conditions, we provide research funding and certain milestone payments in return for the exclusive license to existing and future data and intellectual property generated from clinical trials. Subject to terms and conditions, the UHB Liechti Lab may receive royalties and development revenue on any commercially marketed products developed through the collaboration.

Intellectual Property

We strive to protect the proprietary know-how and technology that we believe is important to our business, including seeking and maintaining patents intended to cover our product candidates and compositions, their methods of use and processes for their manufacture, and any other aspects of inventions that are commercially important to the development of our business. We may also rely on trademarks and/or trade secrets to protect aspects of our business that are not amenable to, or that we do not consider appropriate for, patent protection. To protect our rights to our proprietary know-how and technology, we require all employees, as well as our consultants and CROs, when feasible, to enter into agreements that generally require disclosure and assignment to us of ideas, developments, discoveries and inventions made by these employees, consultants, and CROs in the course of their service to us. On occasion, we also enter into research and development agreements with CDMOs in which certain intellectual property is shared jointly with CDMOs.

We plan to continue to expand our intellectual property estate by filing patent applications directed to compositions, methods of use, treatment and patient selection, formulations and manufacturing processes created or identified from our ongoing development of our product candidates. Our success depends in part on our ability to obtain and maintain patent and other proprietary protection for commercially important technology, inventions and know-how related to our business; defend and enforce our proprietary rights from others infringing our proprietary rights; preserve the confidentiality of our trade secrets; and operate without infringing the valid and

enforceable patents and proprietary rights of third parties. Our policy is to seek to protect our proprietary position by, among other methods, pursuing and obtaining patent protection in the United States and in jurisdictions outside of the United States related to our proprietary technology, inventions, improvements and product candidates that are important to the development and implementation of our business. We may also rely on trademarks, know-how, continuing technological innovation and in-licensing opportunities to develop and maintain our proprietary position. We seek to obtain U.S. and international patent protection, and endeavor to promptly file patent applications for new commercially valuable inventions.

The patent positions of biopharmaceutical companies like us are generally uncertain and involve complex legal, scientific and factual questions. In addition, the coverage claimed in a patent application can be significantly reduced before the patent is issued, and patent scope can be reinterpreted by the courts after issuance. Moreover, many jurisdictions, including the United States, permit third parties to challenge issued patents in administrative proceedings, which may result in further narrowing or even cancellation of patent claims. We cannot predict whether the patent applications we are currently pursuing, or may in the future pursue, will issue as patents in any particular jurisdiction or whether the claims of any issued patents will be enforceable or provide sufficient protection from competitors.

Patent applications in the United States and certain other jurisdictions are maintained in secrecy for 18 months or potentially even longer, or not at all, since publication of discoveries in the scientific or patent literature often lags behind actual discoveries. Therefore, we cannot know with certainty whether we were the first to make the inventions claimed in our owned or licensed patents or pending patent applications, or that we were the first to file for patent protection of such inventions. As a result of these and other factors, the issuance, scope, validity, enforceability and commercial value of our patent rights are uncertain. Our pending and future patent applications may not result in patents being issued which protect our technology or products, in whole or in part, or which effectively prevent others from commercializing competitive technologies and products.

Moreover, we have in the past, and may in the future be subject to a third-party pre-issuance submission of prior art to the U.S. Patent and Trademark Office (“USPTO”). We may also become involved in opposition, derivation, reexamination, inter partes review, post-grant review or interference proceedings challenging our patent rights or the patent rights of others. The costs of defending our patents or enforcing our proprietary rights in post-issuance administrative proceedings and litigation can be substantial and the outcome can be uncertain. An adverse determination in any such submission, proceeding or litigation could reduce the scope of, or invalidate, our patent rights, allow third parties to commercialize our technology or products and compete directly with us, without payment to us, or result in our inability to manufacture or commercialize products without infringing third-party patent rights.

Our patent portfolio, as of February 19, 2026, contains 12 issued U.S. patents, 29 pending U.S. applications, and 1 pending patent cooperation treaty application that are either solely owned by us or in-licensed, as well as certain foreign counterparts of a subset of these patent applications in foreign countries, including Australia, Brazil, Canada, China, Europe, Hong Kong, India, Israel, Japan, Singapore, South Korea, and Taiwan. For lysergide, these patents and patent applications are directed to methods of treatment, analytical methods, compositions of matter, and formulations. For MDMA, these patent applications are directed to R(-)-MDMA and prodrugs thereof, including methods of treatment, methods of manufacture, and compositions of matter. If issued, the 20-year term expiration dates from which our patents will expire is between 2041 to 2044, not including any extension of the patent term that may be available in certain jurisdictions. We continue to seek to maximize the scope of our patent protection for all our programs.

In addition to patents, we also rely upon trademarks, trade secrets, know-how and continuing technological innovation to develop and maintain our competitive position. In January 2026, we publicly began rebranding from MINDMED to DEFINIUM THERAPEUTICS. We have pending trademark applications for our new trademarks, including DEFINIUM THERAPEUTICS, a new logo, and a new tagline. We maintain and are seeking additional registered trademarks, and we also rely on common law trademarks. Common law trademark protection typically continues where and for as long as the mark is used. Registered trademarks continue in each country for as long as the trademark is registered. We believe that we have certain know-how and trade secrets relating to our technology and product candidates. We rely on trade secrets to protect certain aspects of our technology related to our current and future product candidates.

Obtaining patents does not guarantee our right to practice the patented technology or commercialize the patented product. Third parties may have or obtain rights to patents that could be used to prevent or attempt to prevent us from commercializing our product candidates. If third parties prepare and file patent applications in the United States or other jurisdictions that also claim technology to which we have rights, we may have to participate in interference or derivation proceedings in the USPTO or similar proceedings in other jurisdictions to determine the priority of invention.

Patent Term

Generally, issued patents are granted a term of 20 years from the earliest claimed non-provisional filing date. In certain instances, a patent term can be adjusted to recapture a portion of delay by the USPTO in examining the patent application (“PTA”) or extended to

account for term effectively lost as a result of the FDA regulatory review period (“PTE”), or both. In some cases, the term of a U.S. patent may be shortened by the filing of a terminal disclaimer that reduces its term to that of an earlier-expiring patent.

The term of a U.S. patent may be eligible for PTE under the Drug Price Competition and Patent Term Restoration Act of 1984, referred to as the Hatch-Waxman Act, to account for at least some of the time the drug is under development and regulatory review after the patent is granted. With regard to a drug for which FDA approval is the first permitted marketing of the active ingredient, the Hatch-Waxman Act allows for extension of the term of one U.S. patent that includes at least one claim covering the composition of matter of an FDA-approved drug, an FDA-approved method of treatment using the drug, and/or a method of manufacturing the FDA-approved drug. The extended patent term cannot exceed the earlier of five years beyond the non-extended expiration of the patent and 14 years from the date of the FDA approval of the drug. Some foreign jurisdictions, including Europe and Japan, also have patent term extension provisions, which allow for extension of the term of a patent that covers a drug approved by the applicable foreign regulatory agency. In the future, if and when our product candidates receive FDA approval, we expect, where possible, to apply for patent term extension on patents covering those products, their methods of use, and/or methods of manufacture.

Trade Secrets

In addition to patents, we may rely on trade secrets and know-how to develop and maintain our competitive position. Companies typically rely on trade secrets to protect aspects of their business that are not amenable to, or that they do not consider appropriate for, patent protection. We protect trade secrets, if any, and know-how by establishing confidentiality agreements and invention assignment agreements with our employees, and, where feasible, with consultants, scientific advisors, contractors, collaborators and certain other entities with whom we do business. These agreements generally provide that all confidential information developed or made known during the course of an individual or entity’s relationship with us must be kept confidential during and after the relationship. These agreements also generally provide that all relevant inventions resulting from work performed for us or relating to our business and conceived or completed during the period of employment or assignment, as applicable, shall be our exclusive property. In addition, we take other appropriate precautions, such as physical and technological security measures, designed to guard against misappropriation of our proprietary information by third parties.

However, trade secrets can be difficult to protect. While we seek to protect our proprietary information, including trade secrets, in part, by using confidentiality agreements with our commercial partners, collaborators, employees and consultants, and invention assignment agreements with our employees and also have confidentiality agreements or invention assignment agreements with our commercial partners and selected consultants, these agreements may be breached, and we may not have adequate remedies for any breach. In addition, our trade secrets may otherwise become known or be independently discovered by competitors. To the extent that our commercial partners, collaborators, employees and consultants use intellectual property owned by others in their work for us, disputes may arise as to the rights in related or resulting know-how and inventions.

Competition

Our most advanced product candidate, DT120 ODT, is in Phase 3 development for GAD and MDD, with additional psychiatric indications under assessment and planning. Patients with GAD and MDD are typically treated with a variety of anxiolytic and antidepressant medications, including selective serotonin reuptake inhibitors, serotonin–norepinephrine reuptake inhibitors and benzodiazepines. A number of companies are developing product candidates with similar mechanisms to DT120 that are intended for the treatment of anxiety and depressive disorders, including AtaiBeckley Inc. (“AtaiBeckley”), Compass Pathways plc (“Compass”), GH Research (“GH Research”), Cybin, Inc. doing business as Helus Pharma (“Helus”), Johnson & Johnson (“J&J”), Otsuka Pharmaceutical Co. Ltd. (“Otsuka”) and others.

Helus is currently evaluating HLP004 (a serotonin receptor agonist) in a Phase 2 trial for the treatment of GAD, with an anticipated topline data readout in the first quarter of 2026. In addition, Otsuka is currently conducting a Phase 2/3 clinical trial of ulotaront (SEP-363856), a trace amine-associated receptor 1 (TAAR1) agonist with 5-HT1A agonist activity, for the treatment of GAD and MDD.

Intra-Cellular Therapies, now a part of J&J (“Intra-Cellular”), is currently developing multiple product candidates that are in various phases of development for the treatment of GAD and MDD, including CAPLYTA (lumateperone), which was approved by the FDA in November 2025 as an adjunctive treatment for adults with MDD, and ITI-1284 ODT-SL for GAD.

AtaiBeckley is currently developing multiple product candidates that are in various phases of development for the treatment of psychiatric and substance use indications, including VLS-01 (an oral transmucosal film formulation of N,N-dimethyltryptamine (DMT)) and BPL-003 (intranasal mebufotenin (5-MeO-DMT) benzoate) for treatment resistant depression (“TRD”). Compass is developing COMP360 (a proprietary formulation of psilocybin) that is in Phase 3 clinical trials for the treatment of TRD in adults and is being studied in other psychiatric indications (anorexia nervosa and post-traumatic stress disorder). GH Research is developing GH001 and GH002 that are in Phase 1/2 clinical trials for TRD and other psychiatric disorders.

If it is successfully developed and approved for the treatment of TRD in adults, DT120 ODT may also face competition from J&J’s intranasal esketamine (SPRAVATO), and from intravenous ketamine, which is not approved, however is used off label in the treatment of TRD in adults. In addition, DT120 ODT would likely face competition from Axsome Therapeutics Inc.’s (“Axsome”) Auvelity, approved for the treatment of MDD. There are also many other public and private companies developing therapeutics from the psychedelic drug class at various stages of development, including certain short-acting psychedelic drugs.

Our other lead product candidate, DT402, an enantiomer of MDMA with selective serotonergic activity, is in a Phase 2a clinical trial for the treatment of core socialization and communication symptoms in adults with ASD. If successfully developed and approved, DT402 may face competition from AtaiBeckley, which has also indicated it is developing R-MDMA through one of its subsidiaries, and Resilient, which has a (+/-)-MDMA product candidate in clinical development for the treatment of social anxiety in the ASD population. In addition, AtaiBeckley is evaluating EMP-01, its orally administered formulation of R-MDMA, for Social Anxiety Disorder (“SAD”), which is currently in Phase 2 clinical development. Other companies are also developing serotonergic therapies for the treatment of ASD or related indications. For example, Nova Mentis Life Science Corp and Mycrodose Therapeutics Inc. are collaborating on a transdermal psilocybin product candidate for the treatment of Fragile X syndrome.

More broadly, numerous pharmaceutical companies are developing or partnering to develop pharmaceutical products targeting the treatment of brain health disorders. This includes companies such as Novartis AG, Roche, Pfizer Inc., Biogen Inc., Jazz Pharmaceuticals plc, Johnson & Johnson, Supernus Pharmaceuticals, Inc., AbbVie Inc., Neumora Therapeutics, Inc., Praxis Precision Medicines, Biohaven Pharmaceutical Holding Co. Ltd., Eli Lilly And Co., Bristol-Myers Squibb Co., H. Lundbeck A/S, and Alkermes Plc, among many others. Many of our potential competitors, alone or with their strategic partners, have substantially greater financial, technical and human resources than we do, and significantly greater experience in the discovery and development of product candidates, obtaining FDA and other regulatory approvals of treatments and the commercialization of those treatments. Mergers and acquisitions in the biotechnology and pharmaceutical industries may result in even more resources being concentrated among a smaller number of our competitors. We expect competition in the indications we are pursuing will focus on efficacy, safety, convenience, availability, and price. Our commercial opportunity could be reduced or eliminated if our competitors develop and commercialize products that are safer, more effective, have fewer or less severe side effects, are more convenient or are less expensive than any products that we may develop. Our competitors also may obtain FDA or other regulatory approval for their products more rapidly than we may obtain approval for ours, which could result in our competitors establishing a strong market position before we are able to enter the market.

Government Regulation

Government authorities in the U.S. at the federal, state and local level, the UK, the EU, and in other countries extensively regulate, among other things, the research, development, testing, manufacture, quality control, approval, labeling, packaging, storage, record-keeping, promotion, advertising, distribution, post-approval monitoring/pharmacovigilance, safety and periodic reporting, marketing and export and import of drug products. Generally, before a new drug can be marketed in a given jurisdiction, considerable data demonstrating its quality, safety and efficacy must be obtained and/or generated, organized into a format specific to each regulatory authority, submitted for review and the drug must be approved by the relevant regulatory authority or authorities.

U.S. Drug Development

In the U.S., the FDA regulates drugs under the Federal Food, Drug, and Cosmetic Act (“FDCA”), and its implementing regulations. Drugs are also subject to other federal, state and local statutes and regulations. The process of obtaining regulatory approvals and the subsequent compliance with appropriate federal, state, and local statutes and regulations require the expenditure of substantial time and financial resources. Failure to comply with the applicable U.S. requirements at any time during the product development process, approval process or after approval, may subject a company to administrative or judicial sanctions. These sanctions could include, among other actions, the FDA’s delay or refusal to approve pending applications, withdrawal of an approval, a clinical hold on a clinical investigation, warning or untitled letters, product recalls or withdrawals from the market, product seizures, total or partial suspension of production or distribution, injunctions, fines, refusals of government contracts, restitution, disgorgement, or civil penalties or criminal prosecution.

Certain product candidates we are developing contain Schedule I controlled substances, like lysergide or MDMA, as defined in the Controlled Substances Act (“CSA”). Our product candidates must be approved by the FDA through the NDA process, and will need to be rescheduled by the Drug Enforcement Administration (“DEA”) and states, before they may be legally marketed in the U.S. The process required before a drug, including a drug containing a Schedule I substance, may be marketed in the U.S. requires substantial time, effort and financial resources and generally involves the following:

The data required to support an NDA are generated in two distinct development stages: pre-IND and clinical. For new chemical entities, the pre-IND development stage generally involves synthesizing the active component, developing the formulation and determining the manufacturing process, as well as carrying out toxicology, pharmacology and drug metabolism studies in the laboratory, which support subsequent clinical testing. Pre-IND tests include laboratory evaluation of product chemistry, formulation, stability and toxicity, and may also include animal studies to assess the characteristics and potential safety and efficacy of the product. The conduct of the pre-IND tests must comply with applicable federal laws and regulations, including, for animal studies, the Animal Welfare Act and GLP. The sponsor must submit the results of the pre-IND tests, together with manufacturing information, analytical data, any available clinical data or literature and a proposed clinical protocol, to the FDA as part of the IND.

IND Application

An IND is a request for authorization from the FDA to administer an investigational drug product to humans. Some nonclinical testing may continue even after the IND is submitted, but an IND must become effective before human clinical trials may begin. The central focus of an IND submission is on the general investigational plan and the protocols for human trials. The IND automatically becomes effective 30 days after receipt by the FDA, unless the FDA raises concerns or questions regarding the proposed clinical trials, including whether subjects will be exposed to unreasonable health risks, and places the IND on clinical hold within that 30-day time period. In such a case, the IND sponsor and the FDA must resolve any outstanding concerns before the clinical trial can begin. The FDA may also impose clinical holds on a drug candidate at any time during clinical trials due to safety concerns or non-compliance. Accordingly, we cannot be sure that submission of an IND will result in the FDA allowing clinical trials to begin, or that, once begun, issues will not arise that could cause the trial to be suspended or terminated.

A sponsor who wishes to conduct a clinical trial outside the U.S. may, but need not, obtain FDA authorization to conduct the clinical trial under an IND. Foreign studies conducted under an IND must meet the same requirements that apply to studies being conducted in the U.S. If a foreign clinical trial is not conducted under an IND, the sponsor may submit data from the clinical trial to the FDA in support of an NDA so long as the clinical trial is conducted in compliance with GCP, including review and approval by an independent

ethics committee and compliance with informed consent principles, and FDA is able to validate the data from the study through an onsite inspection if deemed necessary.

Clinical Trials

The clinical stage of development involves the administration of the drug candidate to healthy volunteers or to patients with the disease or condition being studied under the supervision of qualified investigators, generally physicians not employed by or under the trial sponsor’s control. Clinical trials must be conducted in accordance with GCPs, which establish standards for conducting, recording data from, and reporting the results of, clinical trials, and are intended to assure that the data and reported results are credible and accurate, and that the rights, safety, and well-being of study participants are protected. GCPs include the requirement that all research subjects provide their informed consent for their participation in any given clinical trial. Clinical trials are conducted under protocols describing, among other details, the objectives of the clinical trial, dosing procedures, subject selection and exclusion criteria, and the parameters to be used to monitor subject safety and assess efficacy. Each protocol, and any subsequent amendments to the protocol, must be submitted to the FDA as part of the IND. Further, each clinical trial must be reviewed and approved by an IRB at or servicing each institution at which the clinical trial will be conducted. An IRB is charged with protecting the welfare and rights of trial participants, and considers such items as whether the risks to individuals participating in the clinical trials are minimized and are reasonable in relation to anticipated benefits. The IRB also approves the informed consent form that must be provided to each clinical trial subject or his or her legal representative and must monitor the clinical trial until completed. Companies sponsoring the clinical trials, investigators, and IRBs also must comply with, as applicable, regulations and guidelines for obtaining informed consent from the study patients, following the protocol and investigational plan, adequately monitoring the clinical trial, and timely reporting of adverse events.

Clinical trials are generally conducted in three sequential phases that may overlap, known as Phase 1, Phase 2 and Phase 3 clinical trials.

Post-approval trials, sometimes referred to as Phase 4 clinical trials, may be conducted after initial marketing approval. These trials are generally used to gain additional experience from the treatment of patients in the intended therapeutic indication. In certain instances, FDA may mandate the performance of Phase 4 clinical trials or studies as a condition of approval of an NDA, for example, if additional safety data is needed.

Progress reports detailing the results of the clinical trials must be submitted at least annually to the FDA and written IND safety reports must be submitted to the FDA and the investigators for serious and unexpected suspected adverse events, increased rates of serious suspected adverse events, or findings from other studies or from animal or in vitro testing that suggests a significant risk for human subjects. Phase 1, Phase 2 and Phase 3 clinical trials may not be completed successfully within any specified period, if at all. Success in one phase does not mean that the results will be observed in subsequent phases. Each phase may involve multiple studies. If concerns arise about the safety of the product candidate, the FDA or other regulatory authorities can stop clinical trials by placing them on a “clinical hold” pending receipt of additional data, which can result in a delay or termination of a clinical development program. The sponsoring company, the FDA, or the IRB may suspend or terminate a clinical trial at any time on various grounds, including a finding that the patients are being exposed to an unacceptable health risk.

Similarly, an IRB can suspend or terminate approval of a clinical trial at its institution if the clinical trial is not being conducted in accordance with the IRB’s requirements or if the drug has been associated with unexpected serious harm to patients. Additionally, some clinical trials are overseen by an independent group of qualified experts organized by the clinical trial sponsor, known as a data safety monitoring board or committee. This group provides authorization for whether or not a trial may move forward at designated check

points based on access to certain data from the trial, and may recommend suspension of a clinical trial at any time on various grounds, including a finding that the research subjects are being exposed to an unacceptable health risk. Concurrent with clinical trials, companies must also develop additional information about the chemistry and physical characteristics of the drug as well as finalize a process for manufacturing the product in commercial quantities in accordance with cGMP requirements. The manufacturing process must be capable of consistently producing quality batches of the drug candidate and, among other things, we must develop methods for testing the identity, strength, quality and purity of the final drug product. Additionally, appropriate packaging must be selected and tested and stability studies must be conducted to demonstrate that the drug candidate does not undergo unacceptable deterioration over its shelf life.

Information about certain clinical trials must be submitted within specific timeframes to the National Institutes of Health (“NIH”) for public dissemination on its clinicaltrials.gov website. Sponsors or distributors of investigational products for the diagnosis, monitoring or treatment of one or more serious diseases or conditions must also have a publicly available policy on evaluating and responding to requests for expanded access requests.

NDA and FDA Review Process

After the completion of clinical trials of an investigational product candidate, FDA approval of an NDA must be obtained before commercial marketing of the product. The NDA must include results of nonclinical studies and of the clinical trials, together with other detailed information, including extensive manufacturing information and information on the composition of the drug and proposed labeling and other relevant information. The FDA reviews the NDA to determine, among other things, whether a drug is safe and effective for its intended use and whether the product is being manufactured in accordance with cGMP to assure the product’s identity, strength, quality and purity.

In addition, under the Pediatric Research Equity Act, certain NDAs or supplements to an NDA must contain data to assess the safety and efficacy of the drug for the claimed indications in all relevant pediatric subpopulations and to support dosing and administration for each pediatric subpopulation for which the product is safe and effective. The FDA may grant deferrals for submission of pediatric data or full or partial waivers, as discussed in Pediatric Trials below.

Under the Prescription Drug User Fee Act, as amended (“PDUFA”), each NDA must be accompanied by a user fee, unless subject to a waiver. The FDA adjusts the PDUFA user fees on an annual basis. The sponsor of an approved application is also subject to an annual program fee. Fee waivers or reductions are available in certain circumstances, including a waiver of the application fee for the first application filed by a small business.

The FDA reviews all NDAs submitted before it accepts them for filing, and may request additional information rather than accepting an NDA for filing. The FDA must make a decision on accepting an NDA for filing within 60 days of receipt. If the submission is accepted for filing, the FDA begins an in-depth review of the NDA. Under the goals and policies agreed to by the FDA under the PDUFA, the FDA aims to complete its initial review of an NDA and respond to the applicant within 10 months from the filing date for a standard NDA, and within six months from the filing date for a priority NDA. The FDA does not always meet its PDUFA goal dates for standard and priority NDAs, and the review process is often significantly extended by FDA requests for additional information or clarification.

After the NDA submission is accepted for filing, the FDA reviews the NDA to determine, among other things, whether the proposed product is safe and effective for its intended use, and whether the product is being manufactured in accordance with cGMP to assure and preserve the product’s identity, strength, quality and purity. Before approving an NDA, the FDA will generally conduct a pre-approval inspection of the manufacturing facilities for the new product to determine whether the facilities comply with cGMP. The FDA will not approve the product unless it determines that the manufacturing processes and facilities are in compliance with cGMP requirements and adequate to assure consistent production of the product within required specifications. Before approving an NDA, the FDA may also audit data from clinical trials to ensure compliance with GCP requirements and integrity of the data submitted in the NDA. Additionally, the FDA may refer applications for novel drug products or drug products which present difficult questions of safety or efficacy to an advisory committee, typically a panel that includes clinicians and other experts, for review, evaluation and a recommendation as to whether the application should be approved and under what conditions. For example, the advisory committee may recommend or the FDA may determine that a Risk Evaluation and Mitigation Strategy (“REMS”) program is necessary to ensure safe use of the product. The FDA is not bound by the recommendations of an advisory committee, but it considers such recommendations carefully when making decisions. The FDA will analyze the clinical trial data, which could result in extensive discussions between the FDA and the applicant during the review process. The review and evaluation process for an NDA by the FDA is extensive and time consuming and may take longer than originally planned to complete, and we may not receive a timely approval, if at all.

After the FDA evaluates an NDA, it may issue an approval letter or a Complete Response Letter. An approval letter authorizes commercial marketing of the drug with specific prescribing information for specific indications. A Complete Response Letter indicates that the review cycle of the application is complete and the application is not ready for approval. A Complete Response Letter usually

describes all of the specific deficiencies in the NDA identified by the FDA. The Complete Response Letter may require additional clinical data and/or one or more additional pivotal Phase 3 clinical trials, and/or other significant and time-consuming requirements related to clinical trials, non-clinical studies or manufacturing. If a Complete Response Letter is issued, the applicant may either resubmit the NDA, addressing all of the deficiencies identified in the letter, or withdraw the application. Even if such additional data and information are submitted, the FDA may ultimately decide that the NDA does not satisfy the criteria for approval. Data obtained from clinical trials are not always conclusive, and the FDA may interpret data differently than we interpret the same data.

An approval letter authorizes commercial marketing of the drug with specific prescribing information for specific indications. The FDA typically requires that certain contraindications, warnings or precautions be included in the product labeling. Even if a product is approved, the approval may be subject to limitations based on the FDA’s interpretation of the data submitted in the application, and the FDA may condition the approval of the NDA on other changes to the proposed labeling, development of adequate controls and specifications, or a commitment to conduct post-marketing testing or clinical trials and surveillance to monitor the effects of approved products. For example, the FDA may require Phase 4 testing which may involve clinical trials designed to further assess a drug’s safety and/or efficacy and may require testing and surveillance programs to monitor the safety of approved products that have been commercialized. The FDA may also place other conditions on approvals including the requirement for a REMS to ensure that the benefits of the product outweigh the risks. If the FDA concludes a REMS is needed, the sponsor of the NDA must submit a proposed REMS. The FDA will not approve the NDA without an approved REMS, if the FDA determines that a REMS is required. A REMS could include a medication guide to patients about the product’s risks and benefits; a plan for communication to health care providers; or conditions on the product’s prescribing or distribution referred to as elements to assure safe use, such as restricted distribution methods, patient registries and other risk minimization tools. Any limitations on approval, marketing or use for any of our products could restrict the commercial promotion, distribution, prescription or dispensing of those products. Additionally, pharmaceutical products containing a Schedule I controlled substances must be rescheduled at the state and federal levels before commercial marketing, as described in Controlled Substances below. Once granted, product approvals may be withdrawn for non-compliance with regulatory requirements if problems occur following launch, or if FDA determines that the product is no longer safe or effective.

Changes to some of the conditions established in an approved application, including changes in indications, labeling, or manufacturing processes or facilities, may require submission and prior FDA approval of a supplemental application (or in some cases a new application) before the change can be implemented. A supplemental application for a new indication typically requires clinical data similar to that in the original application, and the FDA uses the same procedures and actions in reviewing supplements as it does in reviewing original marketing applications.

Expedited Development and Review Programs

The FDA has several programs that are intended to expedite or facilitate the process for reviewing new drugs that are intended to treat a serious or life-threatening condition and demonstrate the potential to address unmet medical needs for the condition. Fast Track designation and Breakthrough Therapy designation are two of these programs and apply to the combination of the product and the specific indication for which it is being studied. The sponsor of a new drug or biologic may request the FDA to designate the drug as a Fast Track product at any time during the development of the product on the basis that data demonstrate the potential to address an unmet medical need, and may request the FDA to designate the drug as a Breakthrough Therapy based on preliminary clinical evidence that the drug may demonstrate substantial improvement on one or more clinically significant endpoints over existing therapies, if available, as outlined in the FDA’s programs. Under the Fast Track or Breakthrough Therapy expedited programs, the FDA may review sections of the marketing application on a rolling basis before the complete NDA is submitted if the sponsor provides a schedule for the submission of the sections of the application, the FDA agrees to accept sections of the application and determines that the schedule is acceptable, and the sponsor pays any required user fees upon submission of the first section of the application. Even if a product receives a designation, the designation can be rescinded and provides no assurance that a product will be reviewed or approved more expeditiously than would otherwise have been the case, or that the product will be approved at all.

Any product submitted to the FDA for marketing, including under a Fast Track or Breakthrough Therapy program, may be eligible for other types of FDA programs intended to expedite development and review, such as priority review and accelerated approval. Any product is eligible for priority review if it treats a serious condition and offers a significant improvement in the safety and effectiveness of treatment, diagnosis or prevention compared to marketed products. Significant improvement may be shown by evidence of increased effectiveness in the treatment of a condition, elimination or substantial reduction of a treatment-limiting product reaction, documented enhancement of patient compliance that may lead to improvement in serious outcomes, and evidence of safety and effectiveness in a new subpopulation. The FDA will attempt to direct additional resources to the evaluation of an application for a new drug designated for priority review in an effort to facilitate the review, and to shorten the FDA’s goal for taking action on a marketing application from ten months to six months from the date of the NDA filing.

A product may also be eligible for accelerated approval if the product is intended to treat a serious or life-threatening illness and provides a meaningful therapeutic benefit over existing treatments. Accelerated approval for a product means that it may be approved on the basis of adequate and well-controlled clinical trials establishing that the product has an effect on a surrogate endpoint that is

reasonably likely to predict a clinical benefit, or on the basis of an effect on a clinical endpoint other than survival or irreversible morbidity. As a condition of approval, the FDA generally requires that a sponsor of a drug receiving accelerated approval perform adequate and well-controlled confirmatory clinical trials to validate the surrogate endpoint or otherwise confirm the clinical benefit. If the FDA concludes that a drug granted accelerated approval can be safely used only if distribution or use is restricted, it will require such post-marketing restrictions, as it deems necessary to assure safe use of the drug, such as:

The limitations imposed would be commensurate with the specific safety concerns presented by the drug. In addition, the FDA currently requires as a condition for accelerated approval pre-approval of promotional materials, which could adversely impact the timing of the commercial launch of the product.

Fast Track designation, priority review, accelerated approval and Breakthrough Therapy designation do not change the standards for approval, but may expedite the development or approval process.

Pediatric Trials

The Food and Drug Administration Safety and Innovation Act (“FDASIA”) amended the FDCA to require that a sponsor who is planning to submit a marketing application for a drug that includes a new active ingredient, new indication, new dosage form, new dosing regimen or new route of administration submit an initial Pediatric Study Plan (“PSP”), within sixty days of an end-of-Phase 2 meeting or as may be agreed between the sponsor and the FDA. The initial PSP must include an outline of the pediatric study or studies that the sponsor plans to conduct, including study objectives and design, age groups, relevant endpoints and statistical approach, or a justification for not including such detailed information, and any request for a deferral of pediatric assessments or a full or partial waiver of the requirement to provide data from pediatric studies along with supporting information. The FDA and the sponsor must reach agreement on the PSP. A sponsor can submit amendments to an agreed-upon initial PSP at any time if changes to the pediatric plan need to be considered based on data collected from non-clinical studies, early phase clinical trials, and/or other clinical development programs. The FDA, if it learns of new information, may also request that the sponsor amend the initial PSP.

Post-Marketing Requirements

Following approval of a new product, a pharmaceutical company and the approved product are subject to continuing regulation by the FDA, including, among other things, monitoring and recordkeeping activities, reporting to the applicable regulatory authorities of adverse experiences with the product, submitting periodic reports and providing the regulatory authorities with updated safety and efficacy information, product sampling and distribution requirements. Additionally, if approval is conditioned on post-marketing requirements, sponsors may need to conduct additional studies or clinical trials. Even if a REMS is not required at approval, FDA could determine that a REMS is necessary based on new safety data after approval.

In addition, pharmaceutical manufacturers must comply with advertising and promotional labeling requirements, which include, among others, standards for direct-to-consumer advertising, promotion to HCPs, restrictions on promoting drugs for uses or in patient populations that are not described in the drug’s approved labeling (known as “off-label use”), limitations on industry-sponsored scientific and educational activities, and requirements for promotional activities involving the Internet. In addition to FDA restrictions on marketing of pharmaceutical products, state and federal fraud and abuse laws have been applied to restrict certain marketing practices in the pharmaceutical industry. Although physicians may prescribe legally available drugs for off-label uses, manufacturers may not market or promote such off-label uses. Prescription drug promotional materials must be submitted to the FDA in conjunction with their first use.

FDA regulations also require that approved products be manufactured in specific approved facilities and in accordance with cGMP. We rely, and expect to continue to rely, on third parties for the production of clinical and commercial quantities of our products in accordance with cGMP regulations. NDA holders using contract manufacturers, laboratories or packagers are responsible for the selection and oversight of qualified firms, and, in certain circumstances, qualified suppliers to these firms. NDA sponsors and their third-party manufacturers must comply with cGMP regulations that require, among other things, quality control and quality assurance as well as the corresponding maintenance of records and documentation and the obligation to investigate and correct any deviations from cGMP. Drug manufacturers and other entities involved in the manufacture and distribution of approved drugs are required to register their establishments with the FDA and certain state agencies, and are subject to periodic unannounced inspections by the FDA and certain state agencies for compliance with cGMP and other laws. Accordingly, manufacturers must continue to expend time, money, and effort in the area of production and quality control to maintain cGMP compliance. The discovery of violative conditions, including failure to conform to cGMP, could result in enforcement actions that interrupt the operation of any such facilities or the ability to distribute products manufactured, processed or tested by them. Discovery of problems with a product after approval may result in restrictions on

a product, manufacturer, or holder of an approved NDA, including, among other things, recall or withdrawal of the product from the market.

Discovery of previously unknown problems with a product or the failure to comply with applicable FDA requirements can have negative consequences, including adverse publicity, administrative enforcement, warning or untitled letters from the FDA, mandated corrective advertising or communications with doctors, and civil penalties or criminal prosecution, among others. Newly discovered or developed safety or effectiveness data may require changes to a product’s approved labeling, including the addition of new warnings and contraindications, and also may require the implementation of other risk management measures, such as a REMS. Also, new government requirements, including those resulting from new legislation, may be established, or the FDA’s policies may change, which could delay or prevent regulatory approval of our products under development.

After approval, if there are any modifications to the drug, including changes in indications, labeling, or manufacturing processes or facilities, or modifying a REMS the applicant may be required to submit and obtain FDA approval of a new NDA or NDA supplement, which may require the applicant to develop additional data or conduct additional non-clinical studies and/or clinical trials. As with new NDAs, the review process may include FDA requests for additional information or clarification, and can ultimately result in denial or modification of the planned changes. Any distribution of prescription drug products and pharmaceutical samples must comply with the U.S. Prescription Drug Marketing Act and the Drug Supply Chain Security Act.

Other U.S. Regulatory Matters

Manufacturing, sales, promotion and other activities following product approval are also subject to regulation by numerous regulatory authorities in addition to the FDA, including, in the U.S., the Department of Health and Human Services; the U.S. Department of Justice; the DEA; the Consumer Product Safety Commission; the Federal Trade Commission; the Occupational Safety and Health Administration; the Environmental Protection Agency; and state and local governments.

In the U.S., arrangements and interactions with healthcare professionals, third-party payors, patients and others will expose us to broadly applicable anti-fraud and abuse, anti-kickback, false claims and other health care laws and regulations. These broadly applicable laws and regulations may constrain the business or financial arrangements or relationships through which we sell, market and distribute our approved product and any future products that may obtain marketing approval. In the U.S., federal and state health care laws and regulations that may affect our operations include:

Substantial resources are necessary to ensure that our business arrangements and interactions with health care professionals, third party payors, patients and others comply with applicable healthcare laws and regulations. Although compliance programs can mitigate the risk of investigation and prosecution for violations of these laws, the risks cannot be entirely eliminated. It is possible that governmental authorities will conclude that our business practices do not comply with current or future statutes, regulations or case law, and if we are found to be in violation of any of these laws or any other governmental regulations, we may be subject to significant civil, criminal and administrative penalties, imprisonment, damages, fines, disgorgement, exclusion from government funded health care

programs such as Medicare and Medicaid or the curtailment or restructuring of our operations. Any action against us for violation of these laws or regulations, even if we successfully defend against it, could cause us to incur significant legal expenses and divert our management’s attention from the operation of our business.

Numerous other laws may apply to our products. Pricing and rebate programs may include, among other things, the Medicaid rebate requirements established under the U.S. Omnibus Budget Reconciliation Act of 1990, as amended, and requirements in the Patient Protection and Affordable Care Act (the “ACA”) and the Inflation Reduction Act (the "IRA"). Civil monetary penalties or other potential sanctions may be imposed for, among other things, a failure to pay required rebates or report required pricing data on a timely basis. If our products are made available to authorized users of the Federal Supply Schedule of the General Services Administration, additional laws and requirements apply. Many states impose various requirements on pharmaceutical manufacturers, including to report development costs and pricing information when prices are increased, with potential penalties for late or faulty reporting. Products must meet applicable child-resistant packaging requirements under the U.S. Poison Prevention Packaging Act. Manufacturing, sales, promotion and other activities are also potentially subject to federal and state consumer protection and unfair competition laws.

The handling of any controlled substances must comply with the CSA, the Controlled Substances Import and Export Act, and any applicable state-controlled substance laws, as discussed in Controlled Substances below.

The distribution of pharmaceutical products is subject to additional requirements and regulations, including extensive record-keeping, licensing, storage and security requirements intended to prevent the unauthorized sale of pharmaceutical products. The failure to comply with any of these laws or regulatory requirements subjects firms to possible legal or regulatory action. Depending on the circumstances, failure to meet applicable regulatory requirements can result in criminal prosecution, fines or other penalties, injunctions, issuance of warning or untitled letters, recall or seizure of products, total or partial suspension of production, denial or withdrawal of product approvals, or refusal to allow a firm to enter into supply contracts, including government contracts. Federal regulators, state attorneys general, and plaintiffs’ attorneys have been and will likely continue to be active in this space. Any action against us for violation of these laws, even if we successfully defend against it, could cause us to incur significant legal expenses and divert our management’s attention from the operation of our business. Prohibitions or restrictions on sales or withdrawal of future products marketed by us could materially affect our business in an adverse way.

Many of these laws differ from one another in significant ways and may not have the same effect, thus complicating compliance efforts. Many of the state laws enable a state attorney general to bring actions and provide private rights of action to consumers as enforcement mechanisms. There is also heightened sensitivity around certain types of health information, such as sensitive condition information or the health information of minors, which may be subject to additional protections. Compliance with these laws is difficult, constantly evolving, and time consuming. Changes in statutes, regulations or the interpretation of existing laws or regulations could impact our business in the future by requiring, for example: (i) changes to our manufacturing arrangements; (ii) additions or modifications to product labeling; (iii) the recall or discontinuation of our products; or (iv) additional record-keeping requirements. If any such changes were to be imposed, they could adversely affect the operation of our business.

State Corporate Practice of Medicine Laws

The corporate practice of medicine and other learned profession laws, regulations and doctrines, which are enforced by most states, are intended to prevent unlicensed persons from interfering with or influencing a physician’s or other medical professional’s professional judgment and prohibiting the sharing of professional services income with non-professional or business interests. These laws vary from state to state and are subject to broad interpretation and enforcement by state regulators. A determination of non-compliance could lead to adverse judicial or administrative action against us, civil or criminal penalties, receipt of cease-and-desist orders from state regulators, loss of professional licenses, or a restructuring of our business arrangements with affiliated providers and our Centers of Excellence.

U.S. Patent Term Restoration and Marketing Exclusivity

Depending upon the timing, duration and specifics of the FDA approval of our drug candidates, if any, some of our U.S. patents may be eligible for limited patent term extension under the Drug Price Competition and Patent Term Restoration Act of 1984, commonly referred to as the Hatch-Waxman Amendments. The Hatch-Waxman Amendments permit a patent restoration term of up to five years as compensation for patent term lost during product development and the FDA regulatory review process. However, patent term restoration cannot extend the remaining term of a patent beyond a total of 14 years from the product’s approval date. The patent term restoration period is generally one-half the time between the effective date of an IND and the submission date of an NDA, or the testing phase, plus the time between the submission date of an NDA and the approval of that application, or the approval phase. This patent term restoration period may be reduced by the FDA if it finds that applicant did not act with due diligence during the testing phase or the approval phase. Only one patent applicable to an approved drug is eligible for the extension and the application for the extension must be submitted prior to the expiration of the patent. The USPTO, in consultation with the FDA, reviews and approves the application for any patent term extension or restoration. In the future, if circumstances permit, we intend to apply for restoration of patent term for

one of our then owned or licensed patents, if any, to add patent life beyond its current expiration date, depending on the expected length of the clinical trials and other factors involved in the filing of the relevant NDA. Even if, at the relevant time, we have a valid issued patent covering our product, we may not be granted an extension if we were, for example, to fail to apply within applicable deadlines, to fail to apply prior to expiration of relevant patents or otherwise to fail to satisfy applicable requirements. Moreover, the applicable time period or the scope of patent protection afforded could be less than we request. If we are unable to obtain patent term extension or restoration or the term of any such extension is less than we request, and we do not have any other exclusivity, our competitors may obtain approval of competing products following our patent expiration and our ability to generate revenues could be materially adversely affected.

Some of our products may also be entitled to certain non-patent-related data exclusivity under the FDCA. The FDCA provides a five-year period of non-patent data exclusivity within the U.S. to the first applicant to obtain approval of an NDA for a new chemical entity (“NCE”). A drug is a new chemical entity if the FDA has not previously approved any other new drug containing the same active moiety, which is the molecule or ion responsible for the action of the drug substance. During the exclusivity period, an abbreviated new drug application (“ANDA”), or a 505(b)(2) NDA may not be submitted by another company for another drug containing the same active moiety, regardless of whether the drug is intended for the same indication as the original innovator drug or for another indication, where the applicant does not own or have a legal right of reference to all the data required for approval. However, an application may be submitted after four years if it contains a certification of patent invalidity or non-infringement to one of the patents listed with the FDA Orange Book by the innovator NDA holder. The FDCA also provides three years of marketing exclusivity for a full NDA, or supplement to an existing NDA if new clinical investigations, other than bioavailability studies, that were conducted or sponsored by the applicant are deemed by the FDA to be essential to the approval of the application, for example, for new indications, dosages or strengths of an existing drug. Three-year exclusivity prevents the FDA from approving ANDAs and 505(b)(2) applications that rely on the information that served as the basis of granting three-year exclusivity. This three-year exclusivity covers only the modification for which the drug received approval on the basis of the new clinical investigations, and does not prohibit the FDA from approving ANDAs for drugs containing the active agent for the original indication or condition of use. Five-year and three-year exclusivity will not delay the submission or approval of a full NDA. However, an applicant submitting a full NDA would be required to conduct or obtain a right of reference to all of the non-clinical studies and adequate and well-controlled clinical trials necessary to demonstrate safety and efficacy.

Certain additional periods of exclusivity may be available if a product is indicated for use in a rare disease or condition or is studied for pediatric indications. If a product that has orphan designation subsequently receives the first FDA approval for the disease or condition for which it has such designation, the product is entitled to orphan product exclusivity, which the FDA has interpreted to preclude approving for seven years any other sponsor’s application to market the same drug for the same use for which the drug has been granted orphan drug designation, except in limited circumstances, such as a showing of clinical superiority to the product with orphan exclusivity. Orphan exclusivity operates independently from other regulatory exclusivities and other protection against generic competition, including patents that we hold for our products. A sponsor of a product application that has received an orphan drug designation may also be granted tax incentives for clinical research undertaken to support the application.

Orphan drug exclusivity does not block approval of competing products intended for the orphan-protected indication but containing a different active moiety, or containing the same moiety but intended for a different use. Orphan product exclusivity that could block a competitor to one of our products also could block the approval of one of our products for seven years if a competitor obtains approval of the product containing the same moiety for the same orphan disease or condition.

Pediatric exclusivity is another type of marketing exclusivity available in the United States. The FDASIA made permanent the Best Pharmaceuticals for Children Act, or BPCA, which extends any existing regulatory exclusivity and patent periods by an additional six months if the sponsor conducts clinical trials in children in response to a Written Request from the FDA. If the Written Request does not include studies in neonates, the FDA is required to include its rationale for not requesting those studies. The FDA may request studies on approved or unapproved indications in separate Written Requests. The issuance of a Written Request does not require the sponsor to undertake the described studies.

European Union Drug Development

In the European Economic Area (“EEA”) (which is comprised of 27 Member States of the EU plus Norway, Iceland and Liechtenstein), our future products may also be subject to extensive regulatory requirements. As in the U.S., medicinal products can only be marketed if a marketing authorization from the European Commission or the competent regulatory authorities of the EU Member State has been obtained.

Similar to the U.S., the various phases of non-clinical and clinical research in the EEA are subject to significant regulatory controls. Regulation (EU) No 536/2014 (the "EU Clinical Trials Regulation"), introduces a complete overhaul of the existing regulation of clinical trials for medicinal products in the EEA, including a new coordinated procedure for authorization of clinical trials and increased obligations on clinical trial sponsors to publish clinical trial results.

In the EEA, pediatric data or a Pediatric Investigation Plan (“PIP”), or waiver, is required to have been agreed upon with the European Medicines Agency (“EMA”), prior to submission of a marketing authorization application to the EMA or the competent authorities of the EU Member States. In some EU countries, we may also be required to have an agreed PIP before we can begin enrolling pediatric patients in a clinical trial.

European Union Drug Review and Approval and Post-Marketing Requirements

In the EEA, medicinal products can only be commercialized after a related marketing authorization has been granted. Marketing authorization for medicinal products can be obtained through several different procedures. These are through a centralized, mutual recognition procedure, decentralized procedure, or national procedure (if marketing authorization is sought for a single EU Member State). The centralized procedure allows a company to submit a single application to the EMA. If a related positive opinion is provided by the EMA, the European Commission will grant a centralized marketing authorization that is valid in all EU Member States and three of the four European Free Trade Associations countries (Iceland, Liechtenstein and Norway), all of whom make up the EEA.

The EU centralized procedure is mandatory for certain types of products, such as biotechnology medicinal products, medicinal products designated as orphan pursuant to Regulation (EC) No 141/2000, advanced therapy medicinal products (“ATMPs”) and medicinal products containing a new active substance indicated for the treatment of HIV, AIDS, cancer, neurodegenerative disorders, diabetes, auto-immune and other immune dysfunctions and viral diseases. The centralized procedure is optional for products containing a new active substance that is not yet authorized in the EEA, or for products that constitute a significant therapeutic, scientific or technical innovation or for which grant of centralized marketing authorization is in the interest of patients in the EU.

The decentralized authorization procedure permits companies to file identical applications for authorization to several EU Member States simultaneously for a medicinal product that has not yet been authorized in any EU Member State. The competent authorities of a single EU Member State, the reference Member State, are appointed to review the application and provide an assessment report. The competent authorities of the other EU Member States, the concerned Member States, are subsequently required to grant marketing authorization for their territories on the basis of this assessment. The only exception to this is where an EU Member State considers that there are concerns of potential serious risk to public health related to authorization of the product. In these circumstances, the matter is submitted to a coordinated group for review and could thereafter be referred to the EMA, which could result in a decision from the European Commission. The mutual recognition procedure allows companies that have a medicinal product already authorized in at least one EU Member State to apply for this authorization to be recognized by the competent authorities in other EU Member States.

The maximum timeframe for the evaluation of a marketing authorization application in the EU is 210 days, not including clock stops during which applicants respond to questions from the competent authority. The initial marketing authorization granted in the EU is valid for five years. The authorization may be renewed and valid for an unlimited period unless the national competent authority of an EU Member State or the European Commission decides on justified grounds to proceed with one additional five-year renewal period. The renewal of a marketing authorization is subject to a re-evaluation of the risk-benefit balance of the product by the national competent authorities of the EU Member States or the EMA.

The holder of an EU marketing authorization for a medicinal product must also comply with the EU’s pharmacovigilance legislation. This includes requirements to conduct pharmacovigilance, or the assessment and monitoring of the safety of medicinal products.

Various requirements apply to the manufacturing and placing on the EU market of medicinal products. Manufacture of medicinal products in the EU requires a manufacturing authorization and import of medicinal products into the EU requires a manufacturing authorization allowing for import. The manufacturing authorization holder must comply with various requirements set out in the applicable EU laws, regulations and guidance. These requirements include compliance with EU cGMP standards when manufacturing medicinal products and active pharmaceutical ingredients (“APIs”), including the manufacture of APIs outside of the EU with the intention to import the APIs into the EU. Similarly, the distribution of medicinal products within the EU is subject to compliance with the applicable EU laws, regulations and guidelines, including the requirement to hold appropriate authorizations for distribution granted by the competent authorities of the EU Member States in which wholesale distributors carry out their activities. Marketing authorization holders and/or manufacturing authorization holders and/or distribution authorization holders may be subject to civil, criminal or administrative sanctions, including suspension of manufacturing authorization, in case of non-compliance with the EU or EU Member States’ requirements applicable to the manufacturing of medicinal products.

In the EU, the advertising and promotion of medicinal products are subject to EU Member States’ laws governing promotion of medicinal products, interactions with physicians and other healthcare professionals, misleading and comparative advertising and unfair commercial practices. For example, applicable laws require that promotional materials and advertising in relation to medicinal products comply with the product’s Summary of Product Characteristics (the “SmPC”), as approved by the competent authorities in connection with a marketing authorization. The SmPC is the document that provides information to physicians concerning the safe and effective use of the product. Promotional activity that does not comply with the SmPC is considered off-label and is prohibited in the EU. Other applicable laws at the EU level and in the individual EU Member States also apply to the advertising and promotion of medicinal products, including laws that prohibit the direct-to-consumer advertising of prescription-only medicinal products and further limit or restrict the advertising and promotion of medicinal products to the general public and to health care professionals. Breaches of the rules governing the promotion of medicinal products in the EU could be penalized by civil, criminal or administrative penalties, which may include fines and imprisonment. Advertising of medicinal products that contain psychotropic and narcotic substances is in any case prohibited.

European Union Regulatory Data Exclusivity

The EU legislation governing grant of marketing authorization for medicinal products provides opportunities for market exclusivity. Upon grant of marketing authorization in the EU, innovative medicinal products generally benefit from eight years of data exclusivity and an additional two years of market exclusivity. If granted, data exclusivity prevents generic or biosimilar applicants from referencing the innovator's pre-clinical and clinical trial data contained in the dossier of the reference product when applying for a generic or biosimilar marketing authorization during a period of eight years from the date on which the reference product was first authorized in the EU. During the additional two-year period of market exclusivity, a generic or biosimilar marketing authorization can be submitted, and the innovator's data may be referenced, but no generic or biosimilar product can be marketed until the expiration of the market exclusivity period. The overall ten-year period will be extended to a maximum of eleven years if, during the first eight years of those ten years, the marketing authorization holder obtains an authorization for one or more new therapeutic indications which, during the scientific evaluation prior to authorization, is held to bring a significant clinical benefit in comparison with existing therapies.

On April 26, 2023, the European Commission adopted a proposal for a new Directive and a new Regulation, collectively referred to as the “Pharmaceutical Package”, which aims to revise and replace the existing EU pharmaceutical legislation in order to enhance the availability, accessibility and affordability of medicinal products across the EU. In the latest version of the proposal, published on December 11, 2025, the regulatory data protection will consist of eight years of data exclusivity, same as under the current legal framework, and one additional year of market exclusivity. This means a total of nine years of protection, instead of the current ten years. Under the reformed legislation, there will be a possibility to obtain one additional year of exclusivity (8+1+1) under certain circumstances and another year (8+1+1 or 8+1+1+1) for a new indication of significant clinical benefit, with a capped overall regulatory protection of 11 years. The final text of the reform proposal is expected to be endorsed and published in first or second quarter of 2026 and, after a transition period, the new legislation is expected to start to apply from mid-2028.

European Union Medical Device Development, CE Marking and Marketing

On May 26, 2021, the Regulation (EU) 2017/745 on Medical Devices (the “MDR”) entered into application, repealing and replacing both the Medical Devices Directive, and the Active Implantable Medical Devices Directive. The MDR and its associated guidance documents and harmonized standards govern, among other things, device design and development, preclinical and clinical or performance testing, premarket conformity assessment, registration and listing, manufacturing, labeling, storage, claims, sales and distribution, export and import and post-market surveillance, vigilance, and market surveillance. Medical devices including medical device software (“MDSW”) must comply with the General Safety and Performance Requirements (“GSPRs”) set out in Annex I of the MDR. Compliance with these requirements is a prerequisite to be able to affix the CE mark to devices, including MDSW, without which they cannot be marketed or sold in the EEA. To demonstrate compliance with the GSPRs provided in the MDR and obtain the right to affix the CE mark, medical devices manufacturers must undergo a conformity assessment procedure, which varies according to the type of medical device and its classification. Apart from low-risk medical devices (Class I with no measuring function, not reusable and which are not sterile), in relation to which the manufacturer may issue an EC Declaration of Conformity based on a self-assessment of the conformity of its products with the GSPRs, a conformity assessment procedure requires the involvement of a Notified Body, which is an organization designated by a Competent Authority of an EEA country to conduct conformity assessments. Depending on the relevant conformity assessment procedure, the Notified Body audits and examines the technical documentation and the quality management system for the manufacture, design and final inspection of the medical devices. The Notified Body issues a CE Certificate of Conformity (the “Certificate”) following successful completion of a conformity assessment procedure conducted in relation to the medical device and its manufacturer and their conformity with the GSPRs. This Certificate and the related conformity assessment process entitles the manufacturer to affix the CE Mark to its medical devices after having drawn up and signed a related EC Declaration of Conformity.

Besides its involvement in the initial conformity assessment procedure, the Notified Body is required to carry out an annual audit (surveillance audit) and randomly perform unannounced audits at least once every five years. The quality management system and technical documentation of manufacturers will be required to be recertified periodically, as CE Certificates of Conformity issued by a Notified Body remain valid only for the period indicated in them and in no case exceeding five years.

As a general rule, demonstration of conformity of medical devices and their manufacturers with the GSPRs must be based, among other things, on the evaluation of clinical data supporting the safety and performance of the devices during normal conditions of use. Specifically, a manufacturer must demonstrate that the device achieves its intended performance during normal conditions of use and that the known and foreseeable risks, and any adverse events, are minimized and acceptable when weighed against the benefits of its intended performance, and that any claims made about the performance and safety of the device (e.g., product labeling and instructions for use) are supported by suitable evidence. This assessment must be based on clinical data, which can be obtained from (1) clinical studies conducted on the devices being assessed, (2) scientific literature from similar devices whose equivalence with the assessed device can be demonstrated or (3) both clinical studies and scientific literature. Manufacturers are required to specify and justify the level of clinical evidence necessary to demonstrate conformity with the relevant GSPR. This level of clinical evidence must be appropriate in view of the characteristics of the device and its intended purpose. The conduct of clinical studies in the EEA is governed by detailed regulatory obligations. These may include the requirement of prior authorization by the Competent Authorities of the country in which the study takes place and the requirement to obtain a positive opinion from a competent Ethics Committee. This process can be expensive and time-consuming.

After a device is placed on the market, it remains subject to significant regulatory requirements. The MDR also imposes post-marketing surveillance requirements which requires manufacturers to continuously and proactively monitor the performance and safety of their devices through implementation of a post-market surveillance system, in a manner that is proportionate to the risk class and appropriate for the type of their device. Once a device is on the EEA market, manufacturers must comply with certain vigilance requirements, such as the reporting of serious incidents and field safety corrective actions (even those occurring outside the EEA) to the relevant Competent Authorities. The Competent Authorities of each EU Member State oversee the implementation of the MDR within their jurisdiction.

Certain of our product candidates are designed to be delivered to patients by dedicated medical devices. In the EU, products that are a combination of a medicinal product and a medical device are regulated as either a medicinal product or a medical device, depending on which component has the primary mode of action.

Medical devices that incorporate as an integral part of a medicinal product that has an action ancillary to the action of the medical device are regulated as medical devices in accordance with the MDR. However, the quality, safety and usefulness of the medicinal product must also be verified as part of the device and a scientific opinion from a national competent authority of an EU Member State or from the EMA, depending on its nature and therapeutic intention, must be sought by the Notified Body regarding the quality and safety of the medicinal product, including the benefit or risk of its incorporation into the medical device. Where a medical device incorporates a medicinal product as an integral part of a single use drug delivery system, it is regulated as a medicinal product. In this case, the relevant GSPRs of the MDR will apply to the safety and performance of the device element.

Regulation of Medicinal Products and Medical Devices following the UK’s Exit from the EU

Following the UK’s withdrawal from the EU on January 31, 2020, commonly referred to as Brexit, the Medicines and Healthcare products Regulatory Agency (the “MHRA”) is now the UK’s standalone regulator. Under the Human Medicines (Amendment etc.) (EU Exit) Regulations 2019, the United Kingdom regulatory regime for clinical trials, marketing authorizations, importing, As part of the EU-UK Trade and Cooperation Agreement, the EU and the UK recognize cGMP inspections carried out by the other party and the acceptance of official cGMP documents issued by the other party. The EU-UK Agreement also encourages, although it does not oblige, the parties to consult one another on proposals to introduce significant changes to technical regulations or inspection procedures. Among the areas of absence of mutual recognition are batch testing and batch release. The UK has unilaterally agreed to accept EU batch testing and batch release. There is a list, including all EU/EEA countries, of approved countries for import into Great Britain which require no import testing or U.K. “qualified person” release certification, provided each batch has been certified by a qualified person in a listed country. However, the EU continues to apply EU laws that require batch testing and batch release to take place in the EU territory. This means that medicinal products that are tested and released in the UK must be retested and re-released when entering the EU market for commercial use.

The UK regulatory framework in relation to clinical trials is derived from previous EU legislation (as implemented into UK law, through secondary legislation). The Medicines for Human Use (Clinical Trial) Regulations 2004 (“UK CTR”) set out the requirements for clinical trials conducted in Great Britain and the EU Clinical Trials Regulation sets out the requirements for clinical trials conducted in Northern Ireland. However, the MHRA remains the competent authority over clinical trials conducted in Great Britain and in Northern Ireland. The UK has a combined review process that streamlines the clinical trial approval process in that applicants submit a single

application via the Integrated Research Application System ("IRAS"), covering both its application for a clinical trial authorization and a research ethics committee opinion. If required, the combined review process can also be used to obtain Health Research Authority Approval.

Amendments to the UK CTR have been adopted into law and come into effect on April 26, 2026. Key amendments include: (i) proportional regulation of lower risk clinical trials and simplified consent-seeking requirements; (ii) additional transparency requirements; (iii) faster approvals, with a maximum 30-day decision timeline for authorizations; (iv) extended archival periods for trial master files from 5 years to 25 years; (v) formal incorporation of the latest ICH GCP; and (vi) a sunset period of two years which is triggered if no participant is recruited within this period. The amendments bring the UK CTR into closer alignment with the EU clinical trial regulations and international standards. Amendments allowing modular and point-of care manufacturing have already taken effect, supporting innovation and flexibility in trial delivery.

As regards marketing authorizations, from January 1, 2025, when the Windsor Framework took effect, a single marketing authorization now covers the whole of the UK and has replaced previous separate licenses for Great Britain and Northern Ireland. Marketing authorizations obtained under the EU centralized authorization procedure are no longer valid in Northern Ireland, and have been converted into a UK-wide marketing authorization. The Windsor Framework has also introduced UK only labeling changes for all medicines placed on the UK market and disapplied the EU Falsified Medicines Directive (“FMD”) in Northern Ireland.

Since January 1, 2021, companies established in the UK cannot use the EU centralized procedure and instead must follow one of the UK national authorization procedures to obtain a marketing authorization to market products in the UK. Under the MHRA’s International Reliance Procedure (“IRP”), the MHRA may take into account a decision to approve a medicine taken by the European Medicines Agency or an equivalent regulatory authority in the US, Canada, Switzerland, Australia, Singapore or Japan as part of an expedited marketing authorization process for that product for the UK.

Regarding medical devices, the MDR entered into application in the EU and also applies directly in Northern Ireland. However, the MDR is not applicable in Great Britain. Instead, Great Britain regulates MDs under the Medical Devices Regulations 2002 (SI 2002 No 618, as amended) (UK MDR 2002) which retains a regulatory framework similar to the framework set out by the MDD.

In light of the fact that the CE marking process is set out in EU law, the UK has devised a new route to market culminating in a UK Conformity Assessed ("UKCA") mark to replace the CE Mark for medical devices on the market in Great Britain. Northern Ireland, however, continues to be covered by the EU MDR and so continues to rely on the CE marking process. CE Marks will continue to be recognized in Great Britain for medical devices until June 30, 2028 (for medical devices compliant with the Medical Devices Directive) and June 30, 2030 (for medical devices compliant with the MDR), and the MHRA has announced an intention to extend such recognition indefinitely. All medical devices, including CE Marked medical devices, must be registered with the MHRA, in order to be placed on the Great Britain market. The UK’s departure from the EU has also impacted customs regulations and impacted timing and ease of shipments into the EU from the UK.

The UK government is currently implementing a phased overhaul of the UK MDR 2002 through a series of Statutory Instruments. The first major pillar of this reform, the Post-Market Surveillance (PMS) requirements took effect in June 2025, and introduced updates to PMS plans, periodic safety update reports (PSURs), and accelerated incident reporting timelines (15 days for serious incidents).

A number of additional changes to the UK MDR are in process, including on pre-market requirements, such as introducing an international reliance route, a new classification system for in vitro medical devices, and whether UKCA marking requirements should be relaxed.

European Union Data Protection

EU Member States and other jurisdictions where we may in the future operate have adopted data protection laws and regulations, which impose significant compliance obligations. For example, the EU General Data Protection Regulation (“EU GDPR”), which became operative on May 25, 2018, replacing the EU Data Protection Directive, imposes strict obligations and restrictions on the processing of personal data, including health data from clinical trials and adverse event reporting. Data Protection Authorities from the different EU Member States may interpret the GDPR and applicable related national laws differently and impose requirements additional to those provided in the GDPR. In addition, guidance on implementation and compliance practices may be updated or otherwise revised, which adds to the complexity of processing personal data in the EEA. The GDPR has introduced additional data protection obligations that can have specific impact on the conduct of clinical trials in the EEA. This includes obligations concerning the rights of patients in relation to their personal data collected during the clinical trials and the need to conclude arrangements with clinical trial sites concerning data processing activities. We may face fines or regulatory action if we violate the EU GDPR. For example, under the EU GDPR, companies may face warnings, compliance orders and fines of up to 20 million Euros or 4% of annual global revenue for the preceding financial year, whichever is greater; or private litigation related to processing of personal data brought by classes of data subjects or

consumer protection organizations authorized at law to represent their interests. The UK has implemented similar data protection framework (“UK GDPR”).

Europe and other jurisdictions have enacted laws requiring data to be localized or limiting the transfer of personal data to other countries. In particular, the EEA and the UK have significantly restricted the transfer of personal data to jurisdictions without an appropriate data transfer mechanism in place. Companies that wish to export personal data outside of the EEA can rely on the European Commission’s Standard Contractual Clauses (“SCCs”) for transfers outside the EEA or the international data transfer agreement (“IDTA”), the international data transfer addendum to the European Commission’s standard contractual clauses for international data transfers for transfers (“Addendum”), or Binding Corporate Rules, outside the UK. Companies relying on SCCs or a transfer mechanism under UK law are required to carry out a transfer risk assessment, which includes documenting detailed analyses of data access and protection laws in the countries in which data importers are located, which can be costly and time-consuming. In addition, on July 10, 2023 the European Commission adopted its adequacy decision for the EU-U.S. Data Privacy Framework. Under this framework, personal data can flow without significant limitation from the EU to U.S. companies that participate in the Data Privacy Framework.

Regulation outside of the U.S. and EU

For other countries outside of the U.S. and EU, such as certain countries in Eastern Europe, Latin America or Asia, the requirements governing the conduct of clinical trials, product licensing, data protection, pricing and reimbursement vary from country to country. In all cases, the clinical trials must be conducted in accordance with GCP requirements and the applicable regulatory requirements and the ethical principles that have their origin in the Declaration of Helsinki.

Approval by a regulatory authority in one jurisdiction does not guarantee approval by comparable regulatory authorities in other jurisdictions. If we fail to comply with applicable foreign regulatory requirements applicable to a given country, we may not be able to obtain regulatory approval for our product candidates in such country if we choose to seek such approval, or we may be subject to, among other things, fines, suspension or withdrawal of regulatory approvals, product recalls, seizure of products, operating restrictions and criminal prosecution.

Coverage and Reimbursement

U.S. Healthcare Reform

The containment of healthcare costs has become a priority of federal and state governments, and the prices of drugs have been a focus in this effort. The U.S. federal government and state legislatures have shown significant interest in implementing drug pricing reform and cost-containment programs, including price controls, restrictions on reimbursement and utilization management requirements, such as requirements for substitution of generic products or therapeutic equivalents. There have been several Congressional inquiries and proposed and enacted federal and state legislation and regulatory initiatives designed to, among other things, bring more transparency to product pricing, evaluate the relationship between pricing and manufacturer patient programs, and reform government healthcare program reimbursement methodologies for drug products. For example, the Inflation Reduction Act, among other things, (1) directs HHS to negotiate the price of certain units of certain single-source drugs and biologics covered under Medicare, (2) imposes certain rebates under Medicare Part B and Medicare Part D for price increases that outpace inflation, and (3) makes changes to the Medicare Part D benefit, including a limit on annual out-of-pocket costs, and replaces the existing coverage gap discount program, that was first enacted as part of the ACA, under which manufacturers agreed to offer point-of-sale discounts off negotiated prices of applicable brand drugs to eligible beneficiaries during the coverage gap period, with a new Part D Manufacturer Discount Program (beginning in 2025). Under the Manufacturer Discount Program manufacturers are, in general, required to provide a 10% discount on a covered Part D drug where a beneficiary is in the initial phase of Part D coverage and a 20% discount where a beneficiary is in the catastrophic phase of Part D coverage. These provisions began to take effect progressively in fiscal year 2023 and have been subject to legal challenges. Any reduction in reimbursement from Medicare or other government programs may result in a similar reduction in payments from private payors. At the state level, legislatures have increasingly passed legislation and implemented regulations designed to control costs of pharmaceutical and biological products, including sometimes establishing Prescription Drug Affordability Boards (or similar entities) to review high-cost drugs and, in some cases, set upper payment limits, implementing marketing cost disclosure and transparency measures, and passing laws that regulate how manufacturers make the 340B Drug Pricing Program ceiling price available on the market. Moreover, regional healthcare authorities and individual hospitals are increasingly using bidding procedures to determine what pharmaceutical products and which suppliers will be included in their prescription drug and other healthcare programs. We expect that the healthcare reform measures that have been adopted, and that may be adopted in the future, may result in more rigorous coverage criteria for healthcare products and services, which could result in additional downward pressure on pharmaceutical drug pricing.

On July 4, 2025, the “One Big Beautiful Bill Act,” or OBBBA, was signed into law. The OBBBA is also projected to decrease federal health care spending by approximately $1 trillion by reducing Medicaid spending and enrollment and making changes to federal Medicare spending. The law also made changes to ACA marketplace enrollment that are projected to decrease the number of individuals with marketplace coverage. It is unclear if these changes will impact the pharmaceutical industry.

Pharmaceutical Pricing and Reimbursement

Any product candidates we successfully commercialize, if approved, in the future depend on the availability and extent of coverage and reimbursement from third-party payors, which are increasingly reducing reimbursements for medical products and services. Decreases in third-party reimbursement for our products or a decision by a third-party payor not to cover a product could reduce HCP usage of our products and have a material adverse effect on our sales, results of operations and financial condition. In the U.S., HCPs are reimbursed for covered services and products through Medicare, Medicaid, and other government healthcare programs, as well as through commercial insurance and managed healthcare organizations. No uniform policy of coverage and reimbursement for drug products exists. Accordingly, decisions regarding the extent of coverage and amount of reimbursement to be provided for any of our products will be made on a payor-by-payor basis. As a result, the coverage determination process is often a time-consuming and costly process that will require us to provide scientific and clinical support for the use of our products to each payor separately, with no assurance that coverage and adequate reimbursement will be obtained. Additionally, our products must be scheduled as a Schedule II or lower controlled substance (i.e., Schedule III, IV or V) before they can be commercially marketed.

In addition, in many foreign countries, the proposed pricing for a drug must be approved before it may be lawfully marketed. The requirements governing drug pricing vary widely from country to country.

In the EU, pricing and reimbursement schemes vary widely from country to country. Some countries provide that products may be marketed only after a reimbursement price has been agreed. Some countries may require the completion of additional studies that compare the cost-effectiveness of a particular product candidate to currently available therapies (so called health technology assessments) in order to obtain reimbursement or pricing approval. For example, the EU provides options for the EU Member States to restrict the range of products for which their national health insurance systems provide reimbursement and to control the prices of medicinal products for human use. EU Member States may approve a specific price for a product, or they may instead adopt a system of direct or indirect controls on the profitability of the company placing the product on the market. Other EU Member States allow companies to fix their own prices for products but monitor and control prescription volumes and issue guidance to physicians to limit prescriptions. Recently, many countries in the EU have increased the amount of discounts required on pharmaceuticals and these efforts could continue as countries attempt to manage healthcare expenditures, especially in light of the severe fiscal and debt crises experienced by many countries in the EU. The downward pressure on healthcare costs in general, particularly prescription products, has become intense. As a result, increasingly high barriers are being erected to the entry of new products. Political, economic, and regulatory developments may further complicate pricing negotiations, and pricing negotiations may continue after reimbursement has been obtained. Reference pricing used by various EU Member States, and parallel trade (arbitrage between low-priced and high-priced Member States), can further reduce prices.

The Health Technology Assessment (“HTA”), which is governed by the national laws of the individual EU Member States, is the procedure according to which the assessment of the public health, therapeutic, economic and societal impact of use of a given medicinal product in the national healthcare systems of the individual country is conducted. The outcome of the HTA regarding specific medicinal products will often influence the pricing and reimbursement status granted to these medicinal products by the competent authorities of individual EU Member States. On January 31, 2018, the European Commission adopted a proposal for a regulation on HTA (“HTA Regulation”). The HTA Regulation aims to boost cooperation among EU Member States in assessing health technologies, including new medicinal products, and providing the basis for cooperation at EU level for joint clinical assessments in these areas. The HTA Regulation was adopted in December 2021, entered into force on January 11, 2022 and started to apply from January 12, 2025. Under the HTA Regulation, EU Member States are required to use common HTA tools, methodologies, and procedures across the EU. Among others, the Regulation establishes an HTA coordination group, composed of national HTA bodies, which jointly conduct Joint Clinical Assessments (“JCAs”) of new medicines and certain high-risk medical devices and introduces a single EU-level submission file for JCAs. However, the HTA Regulation focuses on the clinical aspects of HTA, i.e. the relative clinical effectiveness and relative clinical safety of a new health technology as compared with existing technologies, and, as such, individual EU Member States remain responsible for determining the overall value of a new health technology within their healthcare systems, as well as making pricing and reimbursement decisions.

In various EU Member States, we expect to be subject to continuous cost-cutting measures, such as lower maximum prices, lower or lack of reimbursement coverage and incentives to use cheaper, usually generic, products as an alternative.

In the UK, new innovative products are subject to a health technology assessment process by the National Institute for Health and Care Excellence (“NICE”) to determine whether they are cost effective and should be reimbursed by the National Health Service (“NHS”), the main provider of healthcare, in England and Wales. The Scottish Medicines Consortium makes this assessment for Scotland. The NHS is obliged to provide funding for products with a positive assessment outcome. Manufacturers of branded and biological medicines are also subject to either a voluntary scheme, known as the Voluntary Scheme for Branded Medicines Pricing and Access (“VPAG”) or statutory scheme, under which they pay a rebate to the Department of Health and Social Care (“DHSC”) on the sales of products to the NHS. A new VPAG was agreed by industry and Government and came into force on 1 January 2024, under

which for the first time payments to the DHSC are calculated using different methods for newer medicines and older medicines, rather than the previous single rebate percentage that applied to all products.

Controlled Substances

The CSA and its implementing regulations establish a “closed system” of regulations for controlled substances. The CSA imposes registration, security, recordkeeping and reporting, storage, manufacturing, distribution, importation and other requirements under the oversight of the DEA. The DEA is the federal agency responsible for regulating controlled substances, and requires those individuals or entities that manufacture, import, export, distribute, research, prescribe or dispense controlled substances to comply with the regulatory requirements in order to prevent the diversion of controlled substances to illicit channels of commerce.

The CSA categorizes controlled substances into one of five schedules—Schedule I, II, III, IV or V—with varying qualifications for controlling in each schedule. Schedule I substances by definition have a high potential for abuse, have no currently accepted medical use in treatment in the United States and lack accepted safety for use under medical supervision. Pharmaceutical products having a currently accepted medical use that are otherwise approved for marketing may be controlled as Schedule II, III, IV or V substances, with Schedule II substances presenting the highest potential for abuse and physical or psychological dependence, and Schedule V substances presenting the lowest relative potential for abuse and dependence. Certain product candidates we are developing contain Schedule I controlled substances, like lysergide or MDMA, as defined in the CSA. Drug products approved by the FDA that contain Schedule I substances must be rescheduled to Schedules II-V by the DEA after FDA approval or, potentially, removed completely from the schedules for the product to be prescribed to patients in the United States. To reschedule a substance or product, the DEA must conduct notice-and-comment rulemaking, including issuing an interim final rule 90 days after the later of notification of FDA approval or DEA receipt of the HHS scheduling analysis and recommendation. Such action will be subject to public comment and requests for hearing. Rescheduling and submission of a supplemental application to FDA to update the labeling and packaging of the drug must occur before commercial marketing begins.

Facilities that manufacture, distribute, import or export any controlled substance must register annually with the DEA. The DEA registration is specific to the particular location, activity(ies) and controlled substance schedule(s).

Additionally, the DEA inspects all manufacturing facilities to review security, recordkeeping, reporting and handling prior to issuing a controlled substance registration. The specific security requirements vary by the type of business activity and the schedule and quantity of controlled substances handled. The most stringent requirements apply to manufacturers and distributors of Schedule I and Schedule II substances. Required security measures commonly include background checks on employees and physical control of controlled substances through storage in approved vaults, safes and cages, and through use of alarm systems and surveillance cameras. Once registered, manufacturing facilities must maintain records documenting the manufacture, receipt and distribution of all controlled substances. Manufacturers must submit periodic reports to the DEA of the distribution of Schedule I and II controlled substances, Schedule III narcotic substances, and other designated substances. Registrants must also report any controlled substance thefts or significant losses, and must obtain authorization to destroy or dispose of controlled substances. Imports of Schedule I and II controlled substances for commercial purposes are generally restricted to substances not already available from a domestic supplier or where there is not adequate competition among domestic suppliers. In addition to an importer or exporter registration, importers and exporters must obtain a permit for every import or export of a Schedule I and II substance or Schedule III, IV and V narcotic, and submit import or export declarations for Schedule III, IV and V non-narcotics. In some cases, Schedule III non-narcotic substances may be subject to the import/export permit requirement, if necessary, to ensure that the United States complies with its obligations under international drug control treaties.

The DEA establishes annually an aggregate quota for the amount of substances within Schedules I and II that may be manufactured or procured in the United States based on the DEA’s estimate of the quantity needed to meet legitimate medical, scientific, research and industrial needs. The quotas apply equally to the manufacturing of the active pharmaceutical ingredient and production of dosage forms. The DEA may adjust aggregate production quotas a few times per year, and individual manufacturing or procurement quotas from time to time during the year, although the DEA has substantial discretion in whether or not to make such adjustments for individual companies.

The states also maintain separate controlled substance laws and regulations, including licensing, recordkeeping, security, distribution, and dispensing requirements. State authorities, including boards of pharmacy, regulate use of controlled substances in each state. Because the states are separate jurisdictions, they may separately schedule our product candidates. After FDA approval, states must also reschedule a drug product containing a Schedule I substance, which may occur automatically based on the federal action or may require the state to reschedule the product through rule making or a legislative action. Failure to maintain compliance with applicable requirements, particularly as manifested in the loss or diversion of controlled substances, can result in enforcement action that could have a material adverse effect on our business, operations and financial condition. The DEA or a state may seek civil penalties,

refuse to renew necessary registrations, or initiate proceedings to revoke those registrations. In certain circumstances, violations could lead to criminal prosecution.

Legislation adopted at EU level in relation to establishment of different classes of substances is limited to the EU Regulations that define classes of precursors. These are Regulation (EC) No 273/2004 of the European Parliament and of the Council of 11 February 2004 on drug precursors regulating intra-Community trade, the Council Regulation (EC) No 111/2005 of 22 December 2004 laying down rules for the monitoring of trade between the Community and third countries in drug precursors, the Commission Delegated Regulation (EU) 2015/1011 of 24 April 2015 supplementing the Regulation (EC) No 273/2004, the Commission Implementing Regulation (EU) 2015/1013 of 25 June 2015 laying down rules in respect of the Regulation (EC) No 273/2004, and the Commission Delegated Regulation (EU) 2020/1737 amending Regulation (EC) 273/2004 of the European Parliament and of the Council and Council Regulation (EC) No 111/2005 as regards the inclusion of certain drug precursors in the list of scheduled substances. While EU legislation does not establish different classes of narcotic or psychotropic substances, the EU has a pan-European system to rapidly detect, assess and respond to health and social threats caused by new psychoactive substances (“NPS”), under the procedures set up under Regulation (EU) 2023/1322 of the European Parliament and of the Council of June 27, 2023 as regards information exchange on, and an early warning system and risk assessment procedure for, NPS.

In the EU, controlled substances are largely governed by the national law of the individual EU Member States. EU Member States classify medicinal products and precursors according to the three UN Conventions of 1961, 1971 and 1988 controlling and supervising their legitimate scientific or medical use while taking into account the particular risks to public or individual health. It is within the competence of individual EU Member States to decide whether or not to add a specific substance to a Schedule. EU Member States may require entities and persons to obtain a national license to manufacture, import, export, distribute or offer a substance that has been added to a schedule of controlled substances. The related approach may differ from EU Member State to EU Member State. In the UK, the Misuse of Drugs Act 1971 and its subsequent amendments are the main legal framework for regulating controlled substances. The Act sets out the specific offenses related to the possession, supply, and production of controlled substances, as well as outlines the penalties that can be imposed for such offenses.

At the international level, the United Nations Single Convention on Narcotic Drugs of 1961 and the United Nations Convention on Psychotropic Substances are the primary legal instrument governing the control of controlled substances. The Convention requires States to adopt measures to prevent the misuse of controlled substances and also outlines the penalties to be imposed for the possession or supply of controlled substances in four Schedules. Additionally, the Convention sets out the criteria for classifying controlled substances, and the process for their international trade.

The World Health Organization (WHO) also plays an important role in regulating controlled substances through its Expert Committee on Drug Dependence (ECDD). The ECDD is responsible for assessing the risks and benefits of controlled substances and making recommendations to the WHO on their scheduling. The WHO publishes a regularly updated list of controlled substances, which includes their classification and international trade regulations.

These regulatory frameworks, and any changes to them, can introduce additional risks by making it difficult for manufacturers to access the substances they need to produce their products, and also makes them vulnerable to the risks of non-compliance with the regulations, which can further complicate the process of transporting, importing and exporting controlled substances.

Employees & Human Capital Resources

Our key human capital management objectives are to attract, retain and develop the highest quality talent. To support these objectives, our human resources programs are designed to develop talent to prepare them for critical roles and leadership positions for the future; reward and support employees through competitive pay and benefits; enhance our culture through efforts aimed at making the workplace more engaging and inclusive; and acquire talent and facilitate internal talent mobility to create a high-performing and diverse workforce.

As of December 31, 2025, our personnel consists of 106 total employees, including 105 full-time employees, consisting of 72 in research and development and 33 in general and administrative. We also utilize consultants to assist us in our research and development projects and certain general and administrative functions. We are a remote-first company, meaning that substantially all of our employees and consultants work remotely.

Corporate Information

We were incorporated under the laws of the Province of British Columbia in 2010. Our wholly-owned subsidiary, Definium US, was incorporated in Delaware in 2019. Prior to February 27, 2020, our operations were conducted through Definium US.

On February 27, 2020, we completed a reverse takeover transaction (the “RTO Transaction”) by way of a plan of arrangement under the Business Corporations Act (British Columbia) (the “BCBCA”) among Broadway Gold Mining Ltd. (“Broadway”), Madison Metals Inc., Broadway Delaware Subco Inc. and Mind Medicine, Inc. In connection with the RTO Transaction, immediately prior to the closing of the RTO Transaction, we, among other things, changed our name to Mind Medicine (MindMed) Inc. On January 9, 2026, we changed our name from Mind Medicine (MindMed) Inc. to Definium Therapeutics, Inc. In connection with the name change, we also changed the name of our wholly-owned subsidiary from Mind Medicine, Inc. to Definium Therapeutics US, Inc.

Our global headquarters are located at One World Trade Center, Suite 8500, New York, New York 10007. Our registered office in Canada is located at 1055 Dunsmuir Street, Suite 3000, Vancouver, British Columbia V7X 1K8. We also maintain offices in San Diego, California, Durham, North Carolina and Madison, Wisconsin.

Our common shares are traded on Nasdaq Global Select Market under the symbol “DFTX”.

Available Information

Our website address is www.definiumtx.com. In addition to the information about us contained in this Annual Report, information about us can be found on our website. The information contained on, or that can be accessed through, our website is not part of, and is not incorporated by reference into this Annual Report.

We post links to our website to the following filings as soon as reasonably practicable after they are electronically filed with or furnished to the Securities and Exchange Commission (“SEC”) and the Canadian securities regulators; annual reports on Form 10-K, quarterly reports on Form 10-Q, current reports on Form 8-K, proxy statements, and any amendments to those reports filed or furnished pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934, as amended. All such filings are available through our website free of charge. In addition, the SEC makes available at its website (www.sec.gov), free of charge, reports, proxy and information statements, and other information regarding issuers that file electronically with the SEC. Any filings made to the Canadian securities regulators are available on SEDAR+ (www.sedarplus.ca).

RISK FACTORS

Item 1A. Risk Factors.

The following information sets forth risk factors that could cause our actual results to differ materially from those contained in forward-looking statements we have made in this Annual Report and those we may make from time to time. You should carefully consider the risks described below, as well as the other information in this Annual Report, including our financial statements and related notes and the section titled “Management’s Discussion and Analysis of Financial Condition and Results of Operations,” and in our other public filings in evaluating our business. The occurrence of any of the events or developments described below could harm our business, financial condition, results of operations and growth prospects. In such an event, the market price of our common shares could decline. Additional risks and uncertainties not presently known to us or that we currently deem immaterial also may impair our business operations and the market price of our common shares.

Risks Related to Our Financial Position and Need for Additional Capital

We have a limited operating history, have not completed any pivotal clinical trials, and have no products approved for commercial sale, which may make it difficult for you to evaluate our current business and likelihood of success and viability.

We are a clinical-stage biopharmaceutical company with a limited operating history upon which you can evaluate our business and prospects. We commenced operations in 2019, have no products approved for commercial sale and have not generated any revenue. Drug development is a highly uncertain undertaking and involves a substantial degree of risk. Our most advanced development candidate is DT120 ODT. We initiated our Phase 3 clinical program in GAD in December 2024 and we initiated our Phase 3 clinical program in MDD in April 2025.

We have not yet demonstrated our ability to successfully complete any pivotal clinical trials, obtain marketing approvals, manufacture a commercial-scale product or arrange for a third party to do so on our behalf, or conduct sales and marketing activities necessary for successful product commercialization. As a result, it may be more difficult for you to accurately predict our likelihood of success and viability than it could be if we had a longer operating history.

In addition, we may encounter unforeseen expenses, difficulties, complications, delays and other known and unknown factors and risks frequently experienced by clinical-stage biopharmaceutical companies in rapidly evolving fields. We also may need to transition from a company with a research and development focus to a company capable of supporting commercial activities. We have not yet demonstrated an ability to successfully overcome such risks and difficulties, or to make such a transition. If we do not adequately address these risks and difficulties or successfully make such a transition, our business will suffer.

We are a clinical-stage pharmaceutical company and have incurred significant net losses since our inception, and we expect to continue to incur significant net losses for the foreseeable future.

We have incurred significant net losses since our inception, have not generated any revenue to date and have financed our operations principally through public offerings and private placements of our common shares and warrants to purchase our common shares, and through our credit facility with K2 HealthVentures LLC (“K2HV”). We incurred net losses of $183.8 million and $108.7 million for the years ended December 31, 2025 and December 31, 2024, respectively, and as of December 31, 2025, we had an accumulated deficit of $582.7 million. Our historical losses resulted principally from costs incurred in connection with research and development activities and general and administrative costs associated with our operations. We intend to continue to conduct research and development, preclinical testing, clinical trials, regulatory compliance, market access, commercialization and business development activities that, together with anticipated general and administrative expenses, will result in incurring further significant losses for at least the next several years. Our product candidates are in various clinical, preclinical, discovery and research stages. As a result, we expect that it will be several years, if ever, before we have a commercialized product and generate revenue from product sales. Even if we succeed in receiving marketing approval for and commercializing one or more of our product candidates, we expect that we will continue to incur substantial research and development and other expenses in order to discover, develop and market additional potential products.

We expect to continue to incur significant expenses and increasing operating losses for the foreseeable future. Our expected losses, among other things, may continue to cause our working capital and shareholders’ equity to decrease. We anticipate that our expenses will increase substantially if and as we, among other things:

To become and remain profitable, we will need to continue developing and eventually commercialize product candidates that generate significant revenue. This will require us to be successful in a range of challenging activities, including completing clinical trials of our product candidates, training a sufficient number of qualified healthcare practitioners to deliver our product candidates, obtaining regulatory approval for any product candidates that successfully complete clinical trials, rescheduling product candidates that are currently characterized as Schedule I controlled substances and establishing marketing capabilities. Even if any of the product candidates that we may develop are approved for commercial sale, we anticipate incurring significant costs associated with commercializing any approved product candidate. We are only in the preliminary stages of most of these activities. We may never succeed in these activities and, even if we do, may never generate revenue that is significant enough to achieve profitability.

Because of the numerous risks and uncertainties associated with product development, we are unable to accurately predict the timing or amount of increased expenses or when, or if, we will be able to achieve profitability. If we are required by the FDA, or other comparable foreign authorities to perform studies or clinical trials in addition to those we currently anticipate, or if there are any delays in completing our clinical trials or the development of our product candidates, our expenses could increase beyond our current expectations and revenue could be further delayed.

Even if we or any future collaborators do generate sales, we may never achieve, sustain or increase profitability on a quarterly or annual basis. Our failure to sustain profitability would depress the market price of our common shares and could impair our ability to raise capital, expand our business, diversify our product offerings or continue our operations. If we continue to suffer losses, investors may not receive any return on their investment and may lose their entire investment.

The net losses we incur may fluctuate significantly from quarter to quarter such that a period-to-period comparison of our results of operations may not be a good indication of our future performance. The size of our future net losses will depend, in part, on the rate of future growth of our expenses and our ability to generate revenue. Our prior losses and expected future losses have had and

will continue to have an adverse effect on our working capital, our ability to fund the development of our product candidates and our ability to achieve and maintain profitability and the performance of our common shares.

The terms of our loan agreement place restrictions on our operating and financial flexibility. If we raise additional capital through debt financing, the terms of any new debt could further restrict our operating and financial flexibility.

In August 2023, we entered into a Loan and Security Agreement (the “Loan Agreement”) with K2HV, as administrative agent and Canadian collateral agent for lenders thereunder (K2HV, and any other lender from time to time, the “Lenders”), and Ankura Trust Company, LLC, as collateral trustee for the Lenders. On April 18, 2025 (the “Effective Date”), we entered into the First Amendment to the Loan Agreement with K2HV (as amended, the “Amended Loan Agreement”). On the Effective Date, we borrowed $42.0 million in the first tranche under the Amended Loan Agreement. We may borrow an additional $28.0 million based upon the achievement of certain time-based, clinical and regulatory milestones, and an additional $50.0 million upon our request, subject to review by the Lenders of certain information from us and discretionary approval by the Lenders. Our obligations under the Amended Loan Agreement are secured by a security interest in substantially all of our assets, other than certain intellectual property assets.

The Amended Loan Agreement includes customary affirmative and negative covenants, as well as standard events of default, including an event of default based on the occurrence of a material adverse event. The negative covenants include, among others, restrictions on us transferring collateral, incurring additional indebtedness, engaging in mergers or acquisitions, paying cash dividends or making other distributions, making investments, creating liens, selling assets and making any payment on subordinated debt, in each case subject to certain exceptions. Additionally, if we borrow any additional amounts pursuant to the Amended Loan Agreement, we will be subject to a minimum liquidity covenant beginning on the earlier to occur of (x) July 1, 2026 (which may be extended to July 1, 2027 to the extent we have achieved certain fundraising milestones) and (y) the date on which certain clinical and regulatory milestones are not achieved. The minimum liquidity covenant will be waived in any period where our market capitalization exceeds $500 million.

These restrictive covenants could limit our flexibility in operating our business and our ability to pursue business opportunities that we or our shareholders may consider beneficial. In addition, the Lenders could declare a default upon the occurrence of any event that it interprets could have material adverse effect, subject to the limitations specified in the Amended Loan Agreement. Upon the occurrence and continuance of an event of default, the Lenders may declare all outstanding obligations immediately due and payable and take such other actions as set forth in the Amended Loan Agreement. Any declaration of an event of default could significantly harm our business and prospects and could cause the price of our common shares to decline. If we are liquidated, the rights of the Lenders to repayment would be senior to the rights of the holders of our common shares to receive any proceeds from the liquidation. We may not have enough available cash or be able to raise additional funds through equity or debt financings to repay these outstanding obligations at the time any event of default occurs. Further, if we raise any additional capital through debt financing, the terms of such additional debt could further restrict our operating and financial flexibility.

We have never generated revenue and may never be profitable.

We may never be able to develop or commercialize any marketable products or achieve profitability. Revenue from the sale of any product candidate for which regulatory approval is obtained will be dependent, in part, upon the size of the markets in the territories for which we gain regulatory approval, the accepted price for the product, the acceptance of the product by physicians, payors and patients, the ability to obtain reimbursement and whether we own the commercial rights for that territory. Our growth strategy depends on our ability to generate revenue. In addition, if the number of addressable patients is not as anticipated, the indication or intended use approved by regulatory authorities is narrower than expected, or the reasonably accepted population for treatment is narrowed by competition, physician choice or treatment guidelines, we may not generate significant revenue from sales of such products, even if approved. Even if we are able to generate revenue from the sale of any approved products, we may not become profitable and may need to obtain additional funding to continue operations. Even if we achieve profitability in the future, we may not be able to sustain profitability in subsequent periods.

Our failure to achieve sustained profitability would depress the value of our company and could impair our ability to raise capital, expand our business, diversify our research and development pipeline, market our product candidates, if approved, and pursue or continue our operations. Our prior losses, combined with expected future losses, have had and will continue to have an adverse effect on our shareholders’ equity and working capital.

Our ability to generate revenue and achieve profitability depends significantly on our ability to achieve several objectives relating to the discovery, development and commercialization of our product candidates.

Our business depends entirely on the successful discovery, development and commercialization of product candidates. We have no products approved for commercial sale and do not anticipate generating any revenue from product sales for the next several years, if ever. Our ability to generate revenue and achieve profitability depends significantly on our ability, or any current or future collaborator’s ability, to achieve several objectives, including:

We may never be successful in achieving our objectives and, even if we do, may never generate revenue that is significant or large enough to achieve profitability. If we do achieve profitability, we may not be able to sustain or increase profitability on a

quarterly or annual basis. Our failure to become and remain profitable would decrease the value of our company and could impair our ability to maintain or further our research and development efforts, raise additional necessary capital, grow our business and continue our operations.

We will require substantial additional capital to finance our operations. If we are unable to raise such capital when needed, or on acceptable terms, we may be forced to delay, reduce and/or eliminate one or more of our research and drug development programs or future commercialization efforts.

Developing pharmaceutical products, including conducting preclinical studies and clinical trials, is a very time-consuming, expensive and uncertain process that takes years to complete. Our operations have consumed substantial amounts of cash since inception, and we expect our expenses to increase in connection with our ongoing activities, particularly as we conduct clinical trials of, and seek marketing approval for our product candidates and advance our other programs. Even if one or more of the product candidates that we develop is approved for commercial sale, we anticipate incurring significant costs associated with sales, marketing, manufacturing and distribution activities. Our expenses could increase beyond expectations if we are required by the FDA or other comparable foreign authorities to perform clinical trials or preclinical studies in addition to those that we currently anticipate. Other unanticipated costs may also arise. Because the design and outcome of our planned and anticipated clinical trials are highly uncertain, we cannot reasonably estimate the actual amount of resources and funding that will be necessary to successfully complete the development and commercialization of any product candidate we develop. We are not permitted to market or promote DT120, DT402 or any other product candidate before we receive marketing approval from the FDA or other comparable foreign authorities. Accordingly, we will need to obtain substantial additional funding in order to continue our operations.

As of December 31, 2025, we had $411.6 million in cash, cash equivalents and investments. Based on our current operating plan and anticipated R&D milestones, we expect our cash runway to fund our operations into 2028. Our estimate as to how long we expect our existing cash to fund our operations is based on assumptions that may prove to be wrong, and we could use our available capital resources sooner than we currently expect. Changing circumstances, some of which may be beyond our control, could cause us to consume capital significantly faster than we currently anticipate, and we may need to seek additional funds sooner than planned.

We will be required to obtain further funding through public or private equity offerings, debt financings, collaborations and licensing arrangements or other sources, which may dilute our shareholders or restrict our operating activities. Adequate additional financing may not be available to us on acceptable terms, or at all. Our future funding requirements, both short-term and long-term, will depend on many factors, including:

Our ability to raise additional funds will depend on financial, economic and market conditions and other factors, over which we may have no or limited control. If adequate funds are not available on commercially acceptable terms when needed, we may be forced to delay, reduce or terminate the development or commercialization of all or part of our research programs or our product candidates, or we may be unable to take advantage of future business opportunities. Changes in general market, economic, and political conditions could also adversely impact our ability to access capital as and when needed.

To the extent that we raise additional capital through the sale of equity or convertible debt securities, your ownership interest will be diluted, and the terms may include liquidation or other preferences that adversely affect your rights as a shareholder. Debt financing may result in imposition of debt covenants, increased fixed payment obligations or other restrictions that may affect our business. If we raise additional funds through upfront payments or milestone payments pursuant to strategic collaborations with third parties, we may have to relinquish valuable rights to our product candidates, or grant licenses on terms that are not favorable to us. In addition, we may seek additional capital due to favorable market conditions or strategic considerations even if we believe we have sufficient funds for our current or future operating plans.

Sales of substantial amounts of our securities, or the availability of such securities for sale, as well as the issuance of substantial amounts of our common shares upon conversion of outstanding convertible equity securities, could adversely affect the prevailing market prices for our securities and dilute investors’ earnings per share. A decline in the market prices of our securities could impair our ability to raise additional capital through the sale of securities should we desire to do so.

Our failure to raise capital as and when needed or on acceptable terms would have a negative impact on our financial condition and our ability to pursue our business strategy, and we may have to delay, reduce the scope of, suspend or eliminate one or more of our research-stage programs, clinical trials or future commercialization efforts.

Raising additional capital may cause dilution to our existing shareholders, restrict our operations or require us to relinquish rights to our product candidates on unfavorable terms.

We expect our expenses to increase in connection with our planned operations. Unless and until we can generate a substantial amount of revenue from our product candidates, we expect to finance our future cash needs through a combination of public and private equity offerings, debt financings, strategic partnerships, sales of assets and licensing arrangements. We, and indirectly, our shareholders, will bear the cost of issuing and servicing any such securities and of entering into and maintaining any such strategic partnerships or other arrangements. Because any decision by us to issue debt or equity securities in the future will depend on market conditions and other factors beyond our control, we cannot predict or estimate the amount, timing or nature of any future financing transactions. Subject to certain rules of the Nasdaq Stock Market (“Nasdaq”), our Board of Directors has the authority to authorize certain offers and sales of additional securities without the vote of, or prior notice to, shareholders. Based on the need for additional capital to fund expected expenditures and growth, it is likely that we will issue additional securities to provide such capital. Such additional issuances may involve the issuance of a significant number of common shares at prices less than the current market price for the common shares. To the extent that we raise additional capital through the sale of equity or convertible debt securities, your ownership interest will be diluted, and the terms may include liquidation or other preferences that adversely affect your rights as a shareholder. The incurrence of additional indebtedness would result in increased fixed payment obligations and could involve additional restrictive covenants, such as limitations on our ability to incur additional debt, limitations on our ability to acquire, sell or license intellectual property rights and other operating and financing restrictions that could adversely impact our ability to conduct our business. Additionally, any future collaborations we enter into with third parties may provide capital in the near term, but may also limit our potential cash flow and revenue in the future. If we raise additional funds through strategic partnerships or licensing arrangements with third parties, we may have to relinquish valuable rights to our technologies or product candidates, or grant licenses or other rights on unfavorable terms.

We may plan to grow and develop our business through in-license agreements, acquisitions of or investment in new or complementary businesses, product candidates or technologies, and the failure to manage these license agreements, acquisitions or investments, or the failure to integrate them with our existing business, could have a material adverse effect on us.

We may consider opportunities to in-license, acquire or invest in other technologies, product candidates and businesses that might enhance our capabilities or complement our current product candidates. Potential and completed acquisitions and strategic investments involve numerous risks, including potential problems or issues associated with the following:

We have no current commitments with respect to any in-license, acquisition or investment in other technologies or businesses. We do not know if we will identify other suitable acquisitions, whether we will be able to successfully complete any acquisitions, or whether we will be able to successfully integrate any in-licensed or acquired product candidate, technology or business into our business operations or retain key personnel, suppliers, or collaborators. Our ability to successfully develop our business through in-licenses or acquisitions will depend on our ability to identify, negotiate, complete, and integrate suitable target businesses, product candidates or technologies and obtain any necessary financing. These efforts could be expensive and time-consuming and might disrupt our ongoing operations. If we are unable to efficiently integrate any in-licensed product candidate, acquired business or technology, or product candidate into our business operations, our business and financial condition might be adversely affected.

Risks Related to the Discovery, Development and Commercialization of our Product Candidates

We are dependent on the successful development of our product candidates. We cannot give any assurance that any of our product candidates will successfully complete clinical trials or receive regulatory approval, which is necessary before any product candidate can be commercialized.

We currently have no products that are approved for commercial sale, and we may never be able to develop marketable products. We expect that a substantial portion of our efforts and expenditures over the next several years will be devoted to the development of our product candidates. Accordingly, our business currently depends on the successful regulatory approval of our product candidates and the commercialization of our product candidates if they receive regulatory approval. We cannot be certain that DT120, DT402, or any of our other product candidates will receive regulatory approval or that our product candidates will be successfully commercialized even if they receive regulatory approval. If we are required to discontinue development of our product candidates, or if DT120 or DT402 does not receive regulatory approval or fail to achieve significant market acceptance, we would be delayed by many years in our ability to achieve profitability, if ever.

The research, testing, manufacturing, safety, efficacy, labeling, approval, sale, marketing, and distribution of our product candidates is, and will remain, subject to comprehensive regulation by the FDA, and other foreign regulatory authorities. Failure to obtain regulatory approval in the United States or other jurisdictions will prevent us from commercializing and marketing our product candidates in such jurisdictions.

Even if we were to successfully obtain approval from the FDA and foreign regulatory authorities for our product candidates, any approval might contain significant limitations related to use, as well as restrictions for specified age groups, warnings, precautions, contraindications, and may be subject to additional monitoring and risk management plan requirements. In addition, we anticipate that any regulatory approval of our product candidates may include specific requirements or restrictions on the involvement or conduct of trained healthcare practitioners in the administration of our product candidates and we have not yet received any specific guidance from the FDA, or other regulatory bodies regarding such requirements or restrictions. Furthermore, even if we obtain regulatory approval for our product candidates, we will still need to develop a commercial infrastructure or develop relationships with collaborators to commercialize, including securing availability of third-party treatment sites for the appropriate administration of our product candidates, securing adequate manufacturing, training and securing access to qualified healthcare practitioners, establishing a commercially viable pricing structure and obtaining coverage and adequate reimbursement from

third-party payors, including government healthcare programs. If we, or any future collaborators, are unable to successfully commercialize our product candidates, we may not be able to generate sufficient revenue to continue our business.

The success of our product candidates will depend on several factors, including the following:

If we are not successful with respect to one or more of these factors in a timely manner or at all, we could experience significant delays or an inability to successfully commercialize our product candidates, which would materially harm our business. If we do not receive marketing approvals for our product candidates, we may not be able to continue our operations.

Our focus is on product candidates that are subject to controlled substance laws and regulations in the territories where the products are being developed and intended to be marketed, if approved, and failure to comply with these laws and regulations, or the cost of compliance with these laws and regulations, may adversely affect the results of our business operations and our financial condition, both during clinical development and post approval, if any. In addition, the FDA and/or other regulatory

bodies may require additional data, including with respect to abuse potential of our product candidates, before allowing us to commence a clinical trial or before approving any future marketing application we may submit.

In the United States, lysergide and MDMA are controlled as Schedule I substances under the CSA. Schedule I substances by definition have a high potential for abuse, have no currently “accepted medical use” in the United States, lack accepted safety for use under medical supervision, and may not be prescribed, marketed or sold in the United States. For any product containing a Schedule I substance, such as lysergide or MDMA, to be available for commercial marketing in the United States, the substance or drug product containing the substance must be rescheduled under the CSA to Schedule II, III, IV or V or removed from the Schedules.

Schedule I and II drugs are subject to the strictest controls under the CSA, including manufacturing and procurement quotas, security requirements and special requirements for distribution, importation, and exportation. Pharmaceutical products approved for medicinal use in the United States may be listed as Schedule II, III, IV or V, with Schedule II substances considered to present the highest potential for abuse or dependence and Schedule V substances the lowest relative risk of abuse among such substances. Even if approved by the FDA, prescribing and dispensing of a controlled substance is subject to restrictions, with heightened restrictions for Schedule II controlled substances. For example, prescriptions for a Schedule II drug may not be refilled without a new prescription. Further, most, if not all, state laws in the United States classify lysergide and MDMA as Schedule I controlled substances. Commercial marketing in the United States will also require state scheduling-related legislative or administrative action.

Scheduling determinations by the DEA are often dependent on FDA approval of a substance or a specific formulation of a substance. Therefore, while lysergide and MDMA are Schedule I controlled substances, products approved by the FDA for medical use in the United States that contain lysergide and/or MDMA must be descheduled or rescheduled to Schedules II-V, since approval by the FDA satisfies the “accepted medical use” requirement. If DT120 and DT402 receive FDA approval, HHS and the DEA must complete a scheduling analysis and make a scheduling determination to deschedule or place either the substance or the drug product in a schedule other than Schedule I in order for them to be able to be prescribed to patients in the United States. This scheduling determination will be dependent on FDA approval and the HHS’s recommendation as to the appropriate schedule under the CSA. The rescheduling process requires the DEA to conduct notice-and-comment rulemaking, including issuing an interim final rule 90 days after the later of notice of FDA approval or DEA receipt of the HHS scheduling analysis and recommendation. Such action will be subject to public comment and requests for hearing. Even assuming our product candidates are controlled in Schedule II or lower at the federal level, such substances or products may require separate rescheduling or descheduling determinations under state laws and regulations.

If approved by the FDA, and if the finished dosage form of any of our product candidates is controlled as a Schedule II, III, or IV controlled substance under the CSA, such product candidate’s manufacture, importation, exportation, domestic distribution, storage, sale and legitimate use will continue to be subject to a significant degree of regulation by the DEA. In addition, product candidates containing controlled substances are subject to DEA regulations relating to manufacturing, storage, distribution and physician prescription procedures, including:

Our product candidates are controlled substances, the use of which may generate public controversy. Adverse publicity or public perception regarding controlled substances and psychedelics may negatively influence the success of our product candidates.

Product candidates containing controlled substances have generated public controversy. Political and social pressures and adverse publicity could lead to delays in approval of, and increased expenses for, our product candidates. Anti-psychedelic protests have historically occurred and may occur in the future and generate media coverage. Opponents of these product candidates, which may include regulators, may seek to prevent approvals, restrict marketing or demand withdrawal of any regulatory approvals. In addition, these opponents may generate negative publicity in an effort to persuade the medical community to reject these product candidates. For example, we may face media-communicated criticism directed at our clinical development program. In addition, adverse publicity related to lysergide or MDMA, or any other substance that underlies our product candidates or fall into the same drug or chemical class, which may be referred to as psychoactive or psychedelic drugs, may result from political or social opposition to controlled substances, misuse and abuse of controlled substances recreationally, or clinical trial conduct, including abuse by investigators. Adverse publicity of not only our product candidates, but also any similar controlled substances, may affect our clinical trials, potential regulatory approval, and the commercial success or market penetration achievable by our product candidates. For example, Resilient (formerly Lykos Therapeutics), another company developing a drug product candidate containing MDMA, has faced significant public scrutiny and adverse publicity following negative public statements and allegations about clinical trial conduct made by clinical trial participants. Public controversy over the misuse or abuse potential of our or our competitor’s product candidates may also harm our ability to recruit and retain clinical trial participants, negatively influence the recommendations of an FDA Advisory Committee, and/or result in the FDA requesting additional data related to the abuse potential of our product candidates, which could lead to delays in approval and increased research and development costs for our product candidates. Even if our product candidates are approved by the FDA, political pressures and adverse publicity could lead to delays in, and increased expenses for, and limit or restrict the introduction and marketing of, our product candidates.

We will be highly dependent upon consumer perceptions of the safety and quality of our product candidates if they are approved for commercial sale. We may face limited adoption if third-party treatment sites, HCPs, and patients are unwilling to try such a novel treatment and press coverage may influence their willingness. In addition to the history of negative media coverage regarding psychedelic substances, including lysergide and MDMA, recent and future public controversy related to clinical or recreational use of such substances, may affect the public’s perception of our product candidates, which could adversely affect our business. We also could be adversely affected if any of our product candidates prove to be, or are asserted to be, harmful to patients, which could result in reputational harm. In addition, lysergide elicits intense psychological experiences, and this could deter patients from enrolling in clinical trials or choosing this course of treatment. Because of our dependence upon consumer perception, any adverse publicity associated with illness or other adverse effects resulting from patients’ use or misuse of our product candidates or any similar therapies distributed by other companies could have a material adverse impact on our business, prospects, financial condition and results of operations. Consumer perception can also be significantly influenced by scientific research or findings regarding the consumption of psychedelic inspired products. There can be no assurance that future scientific research or findings will be favorable to the market or any particular product, or consistent with earlier research or findings. Research in Canada, the U.S. and in other jurisdictions regarding the medical benefits, viability, safety, efficacy and dosing of psychedelic drugs remains limited. Although we believe that various articles, reports and studies support our beliefs regarding the medical benefits, viability, safety, efficacy and dosing of psychedelic inspired medicines, future research and clinical trials may prove such statements to be incorrect or could raise concerns. Future research studies and clinical trials may draw opposing conclusions to those stated in this report or reach negative conclusions regarding the medical benefits, viability, safety, efficacy, dosing, or other facts related to psychedelic inspired medicinal applications, which could have a material adverse effect on the demand for our products, and therefore on our business, prospects, revenue, results of operation and financial condition.

Future adverse events in research into GAD, MDD, ASD and other brain health disorders on which we focus our research efforts, or the pharmaceutical industry more generally, could also result in greater governmental regulation, stricter labeling requirements and potential regulatory delays in the testing or approvals of our product candidates. Any increased scrutiny could delay or increase the costs of obtaining regulatory approval for our product candidates.

Drug development is a lengthy and expensive process with uncertain timelines and uncertain outcomes. If preclinical studies or clinical trials of our product candidates are prolonged or delayed, we or our current or future collaborators may be unable to obtain required regulatory approvals, which would mean that we would be unable to commercialize our product candidates on a timely basis or at all, which will adversely affect our business.

Drug development is expensive and can take many years to complete, and its outcome is inherently uncertain. Failure can occur at any time during the preclinical and clinical trial process and we may never successfully progress a product candidate through clinical development.

Furthermore, we may experience delays in completing our ongoing preclinical studies and clinical trials and initiating or completing additional preclinical studies or clinical trials. We may also experience numerous unforeseen events during preclinical and clinical development that could delay or prevent our ability to receive marketing approval or commercialize our product candidates, including:

We could encounter delays if a clinical trial is suspended or terminated by us, by the IRBs of the institutions in which such trials are being conducted or ethics committees, by the Data Review Committee (the “DRC”), or Data Safety Monitoring Board for such trial, as applicable, or by the FDA or other regulatory authorities or if the DEA registration of an investigator or site conducting the clinical trial is revoked. Such authorities may impose such a suspension or termination due to a number of factors, including failure to conduct the clinical trial in accordance with regulatory requirements or our clinical protocols, inspection of the clinical trial operations or trial site by the FDA or other regulatory authorities resulting in the imposition of a clinical hold, unforeseen safety issues or adverse side effects, including any SUSARs or SAEs which have in the past or may in the future occur in our trials or any IITs or other studies using lysergide, MDMA and any other substance that underlies our product candidates and those relating to the class to which lysergide, MDMA and other Schedule I controlled substances or any other product candidates belong, failure to demonstrate a benefit from using a drug, changes in governmental regulations or administrative actions or lack of adequate funding to continue the clinical trial. If we experience delays in the completion of, or termination of, any clinical trial of DT120, DT402 or any other product candidates, the commercial prospects of our product candidates will be harmed, and our ability to generate revenue from any such product candidates will be delayed. In addition, any delays in completing our clinical trials will likely increase our costs, slow down DT120, DT402 or any other product candidate development and approval process and jeopardize our ability to commence sales and generate revenue. Moreover, if we make changes to our product candidates, we may need to conduct additional bioequivalence studies to bridge such modified product candidates to earlier versions, which could delay our clinical development plan or marketing approval for our product candidates. Significant preclinical and clinical trial delays could also allow our competitors to bring therapies to market before we do or shorten any periods during which we have the exclusive right to commercialize our product candidates and impair our ability to commercialize our product candidates and may harm our business and results of operations.

Any of these occurrences may harm our business, financial condition and prospects significantly. In addition, many of the factors that cause, or lead to, a delay in the commencement or completion of clinical trials may also ultimately lead to the denial of regulatory approval of our product candidates or result in the development of our product candidates being stopped early.

Our clinical trials may fail to demonstrate substantial evidence of the safety and effectiveness of DT120, DT402, or any other product candidates that we may identify and pursue, which would prevent, delay or limit the scope of regulatory approval and commercialization.

Before obtaining regulatory approvals for the commercial sale of our product candidates, we must demonstrate through lengthy, complex and expensive preclinical studies and clinical trials that the applicable product candidate is both safe and effective for use in each target indication. To receive regulatory approval for commercial sale, a product candidate must demonstrate an adequate risk versus benefit profile in its intended patient population and for its intended use.

Clinical testing is expensive and can take many years to complete, and its outcome is inherently uncertain. Failure can occur at any time during the clinical development process. There is a high risk of failure and we may never succeed in developing marketable products. Most product candidates that begin clinical trials are never approved by regulatory authorities for commercialization. We have limited experience in designing clinical trials and may be unable to design and execute a clinical trial to support marketing approval.

We cannot be certain that our clinical trials will be successful. Clinical trials that we conduct may not demonstrate the efficacy and safety necessary to obtain regulatory approval to market our product candidates. In some instances, there can be significant variability in safety or efficacy results between different clinical trials of the same product candidate due to numerous factors, including changes in trial procedures set forth in protocols, differences in the size and type of the patient populations, changes in and adherence to the clinical trial protocols and the rate of dropout among clinical trial participants. If the results of our clinical trials are inconclusive with respect to the efficacy of DT120, DT402 and any other product candidates, if we do not meet the clinical endpoints with statistical and clinically meaningful significance, or if there are safety concerns associated with DT120, DT402 and any other product candidates, we may be delayed in obtaining marketing approval, or we may never obtain marketing approval. Any safety concerns observed in any one of our clinical trials in our targeted indications could limit the prospects for regulatory approval of DT120, DT402 and any other product candidates in those and other indications, which could have a material adverse effect on our business, financial condition and results of operations.

Even if our clinical trials are successfully completed, preclinical and clinical data are often susceptible to varying interpretations and analyses and we cannot guarantee that the FDA or comparable foreign regulatory authorities will interpret the results as we do. Accordingly, more trials could be required before we submit any product candidates for approval. In addition, the FDA or other foreign regulatory authorities may change their recommendations for clinical trial conduct, such as for assessing abuse potential, like hallucinations, or the use of psychological support or psychotherapy in combination with a product candidate, for our product candidates or their drug class through regulation, guidance, or informal communications at any time, especially as drug development in this area increases. Because clinical trials take a significant period of time, we cannot assure that our trial design will comply with future FDA recommendations for clinical investigations involving psychedelic drugs. We may have already initiated or completed our clinical trials, and may need to amend our study protocol or conduct additional clinical trials as a result, which could be costly and time-consuming, and may significantly delay or limit our ability to commercialize our product candidates. For example, the FDA issued a draft guidance in June 2023 outlining clinical considerations for psychedelic drugs. There can be no assurances that the FDA will not change its recommendations in a revised guidance or final guidance, or issue a new draft guidance that could affect our development programs. To the extent that the results of the trials are not satisfactory to the FDA or comparable foreign regulatory authorities for support of a marketing application, approval of our product candidates may be significantly delayed, or we may be required to expend significant resources, which may not be available to us, to conduct additional trials in support of potential approval of our product candidates. Moreover, results acceptable to support approval in one jurisdiction may be deemed inadequate by another regulatory authority to support regulatory approval in that other jurisdiction. Due to the inherent risk in the development of product substances, there is a significant likelihood that DT120, DT402 and any other product candidates will not successfully complete development and receive approval. Many other companies that believed their product candidates performed satisfactorily in preclinical studies and clinical trials have nonetheless failed to obtain regulatory approval for the marketing of their product candidates. If we do not receive regulatory approvals for DT120, DT402 or any other product candidates, we may not be able to continue our operations. Even if regulatory approval is secured for DT120, DT402 or any other product candidate, the terms of such approval may limit the scope and use of a specific product candidate, which may also limit its commercial potential.

Changes in our formulation or components of our formulation of DT120 or DT402 could have a material adverse effect on our business, financial condition and results of operations.

Changes in our formulation or components of our formulation of our product candidates, including excipients, salt forms, polymorphic forms, and packaging, could cause our product candidates to perform differently, cause unforeseen side effects or affect the results of our clinical trials, repeat one or more clinical trials, increase clinical trial costs or delay or prevent the submission, or approval, of one or more product candidates. Such delays and costs could jeopardize our ability to, if approved, commercialize our product candidates, which could have a material adverse effect on our business, financial condition and results of operations.

In August 2023, we entered into an exclusive licensing agreement with Catalent for its patented Zydis® ODT technology. Under the terms of the licensing agreement, Catalent granted us, among other things, access to its Zydis technology for the development of DT120. Zydis ODT is a unique, freeze-dried, oral solid dosage form that disperses almost instantly in the mouth, without the need for water.

In our Phase 2 clinical trials for DT120, we used a formulation of DT120 that did not include ODT technology. In 2024, we completed a pharmacokinetics (“PK”) bridging study to support the advancement of the DT120 ODT formulation into pivotal clinical trials, and we are using the DT120 ODT formulation in our Phase 3 clinical trials for GAD and MDD. This change in formulation could cause DT120 to perform differently, cause unforeseen side effects or affect the results of our Phase 3 clinical trials. This could delay completion of our Phase 3 clinical trials, require us to conduct additional bridging clinical trials, repeat one or more clinical trials, increase clinical trial costs or delay or prevent the submission, or approval, of one or more NDAs for DT120. Such delays and costs could jeopardize our ability to, if approved, commercialize DT120 for GAD, MDD or other future indications, which could have a material adverse effect on our business, financial condition and results of operations.

Interim, topline and preliminary data from our clinical trials that we announce or publish from time to time may change as more patient data become available and are subject to audit and verification procedures that could result in material changes in the final data. These data may not be sufficient to support regulatory submissions or approvals.

From time to time, we may publish interim, topline or preliminary data from our clinical trials. We may decide to conduct an interim analysis of the data after a certain number or percentage of patients have been enrolled, but before completion of the trial. Similarly, we may report topline or preliminary results of primary and key secondary endpoints before the final trial results are completed. Interim, topline and preliminary data from our clinical trials may change as more patient data or analyses become available. Preliminary, topline or interim data from our clinical trials are not necessarily predictive of final results. Interim, topline and preliminary data are subject to the risk that one or more of the clinical outcomes may materially change as patient enrollment continues, more patient data become available and we issue our final clinical trial report. Interim, topline and preliminary data also remain subject to audit and verification procedures that may result in the final data being materially different from the preliminary data we previously published. As a result, interim, topline and preliminary data should be viewed with caution until the final data are available. Material adverse changes in the final data compared to the interim data could significantly harm our business prospects.

Further, others, including regulatory agencies and independent organizations evaluating prescription drugs, such as the Institute for Clinical and Economic Review (“ICER”), may not accept or agree with our assumptions, estimates, calculations, conclusions or analyses or may interpret or weigh the importance of data differently, which could impact the value of the particular program, the approvability or commercialization of the particular product candidate and our company in general, and regulatory agencies may request further data from us. In addition, you or others may not agree with what we determine is the material or otherwise appropriate information to include in our disclosure, and any information we determine not to disclose may ultimately be deemed significant with respect to future decisions, conclusions, views, activities or otherwise regarding a particular product candidate. If the topline data that we report differ from actual results, or if others, including regulatory authorities, disagree with the conclusions reached, our ability to obtain approval for, and commercialize DT120, DT402 or any other product candidate, our business, operating results, prospects or financial condition may be harmed.

We may not be able to commence additional clinical trials on the timelines we expect, and even if we are able to, the FDA or similar regulatory authorities may not permit us to proceed in a timely manner, or at all.

Prior to commencing clinical trials in the United States or other jurisdictions, we may be required to have an allowed IND (or equivalent) for each product candidate and to file additional INDs prior to initiating any additional clinical trials for such product candidates. We believe that the data from previous studies will support the filing of additional INDs to enable us to undertake additional clinical trials of our product candidate portfolio as planned. However, submission of an IND (or equivalent) may not result in the FDA (or equivalent authorities) allowing further clinical trials to begin and, once begun, issues may arise that will require us to suspend or terminate such clinical trials (e.g., if the FDA places the trial on a clinical hold for safety reasons). Additionally, even if relevant regulatory authorities agree with the design and implementation of the clinical trials set forth in an IND, these regulatory authorities may change their requirements in the future. Failure to submit or have effective INDs (or equivalent) and commence or continue clinical programs will significantly limit our ability to generate revenue.

We may not achieve our publicly announced milestones according to schedule, or at all.

From time to time, we may announce the timing of certain events that we expect to occur, such as the anticipated timing of results from our clinical trials. These statements are forward-looking and are based on the best estimates of management at the time relating to the occurrence of such events. However, the actual timing of such events may differ from what has been publicly

disclosed. The timing of events such as initiation or completion of a clinical trial, filing of an application to obtain regulatory approval, or announcement of additional clinical trials for a product candidate may ultimately vary from what is publicly disclosed. These variations in timing may occur as a result of different events, including the nature of the results obtained during a clinical trial or during a research phase, timing of the completion of clinical trials, or any other event having the effect of delaying the publicly announced timeline. We undertake no obligation to update or revise any forward-looking information or statements, whether as a result of new information, future events or otherwise, except as otherwise required by law. Any variation in the timing of previously announced milestones could have a material adverse effect on our business plan, financial condition or operating results and the trading price of our common shares.

The regulatory approval process of the FDA and other comparable foreign authorities are lengthy, time-consuming and inherently unpredictable, and if we are ultimately unable to obtain regulatory approval for any product candidates, our business will be substantially harmed.

We have not submitted a marketing authorization application to the FDA or other comparable foreign regulatory authority. Before obtaining regulatory approvals for the commercial sale of any product candidates, we must demonstrate through lengthy, complex and expensive preclinical testing and clinical trials that such product candidate is both safe and effective for use in each target indication. Clinical testing is expensive and can take many years to complete, and its outcome is inherently uncertain. Failure can occur at any time during the clinical trial process, and, because our product candidates are in an early stage of development, there is a high risk of failure and we may never succeed in developing marketable products.

The time required to obtain approval by the FDA and comparable foreign authorities is unpredictable but typically takes many years following the commencement of clinical trials and depends upon numerous factors, including the substantial discretion of the regulatory authorities to set approval policies and data requirements. In addition, approval policies, regulations, or the type and amount of clinical data necessary to gain approval may change during the course of a product candidate’s clinical development and may vary among jurisdictions. Given the limited recent experience with clinical use of psychedelic drugs, it is likely the regulatory landscape will evolve, and could do so rapidly. We cannot guarantee that we will be able to, or have the resources to adapt to changes in regulatory requirements. We have not obtained regulatory approval for any of our product candidates. It is possible that none of our product candidates will ever obtain regulatory approval.

Any of our product candidates could fail to receive regulatory approval from the FDA or comparable foreign regulatory authorities or be precluded from commercial marketing for many reasons, including the following:

This lengthy approval process, the unpredictability of future clinical trial results, and the potential influence of public opinion may result in our failing to obtain regulatory approval to market any product candidates, which would significantly harm our business, results of operations and prospects. The FDA and other comparable foreign authorities have substantial discretion in the approval process, including the data required for regulatory approval, and determining when or whether regulatory approval will be obtained for any of our product candidates. Even if we believe the data collected from clinical trials of our product candidates are promising, such data may not be sufficient to support approval by the FDA or any other regulatory authority. If DT120, DT402 or any other product candidates fails to obtain approval on the basis of any applicable condensed regulatory approval process (such as priority review in the US), this will prevent such product candidate from obtaining approval on a shortened time frame, or at all, resulting in increased expenses which would materially harm our business.

In addition, even if we were to obtain approval, regulatory or pricing authorities may approve any product candidates for fewer or more limited indications than we request, may not approve the price we intend to charge for our product candidates, may grant approval contingent on the performance of costly post- marketing clinical trials, or may approve a product candidate with a label that does not include the labeling claims necessary or desirable for the successful commercialization of that product candidate. Any of the foregoing scenarios may have a negative impact on the commercial prospects for our product candidates and our business.

Even if DT120, DT402 or any other product candidates obtain regulatory approval, we will be subject to ongoing obligations and continued regulatory review, which may result in significant additional expense. Additionally, any such product candidates, if approved, could be subject to labeling and other restrictions and market withdrawal and we may be subject to penalties if we fail to comply with regulatory requirements or experience unanticipated problems with our product candidates.

If the FDA or a comparable foreign regulatory authority approves DT120, DT402 or any other product candidates, the manufacturing processes, labeling, packaging, distribution, adverse event reporting, storage, advertising, promotion and recordkeeping for the product candidates and underlying product substance will be subject to extensive and ongoing regulatory requirements. These requirements include submissions of safety and other post-marketing information and reports, registration, as well as continued compliance with cGMP, and with GCPs, for any clinical trials that we conduct post-approval, all of which may result in significant expense and limit our ability to commercialize such product candidates. Additionally, a company may not promote “off-label” uses for its drug products. An off-label use is the use of a product for an indication that is not described in the product’s FDA-approved label in the U.S. or for uses in other jurisdictions that differ from those approved by the applicable regulatory agencies. Physicians, on the other hand, may prescribe products for off-label uses. Although the FDA and other regulatory agencies do not regulate a physician’s choice of drug treatment made in the physician’s independent medical judgment, they do restrict promotional communications from companies or their sales force with respect to off-label uses of products for which marketing clearance has not been issued. Later discovery of previously unknown problems with any approved product candidate, including adverse events of unanticipated severity or frequency, or with our third-party manufacturers or manufacturing processes, or failure to comply with regulatory requirements, may result in, among other things:

In addition, any regulatory approvals that we receive for DT120, DT402 or any other product candidates may also be subject to limitations on the approved indicated uses for which the product candidates may be marketed or to the conditions of approval, or contain requirements for potentially costly post-marketing testing, including Phase IV clinical trials, and surveillance to monitor the safety and efficacy of such product candidates. For instance, we believe that DT120, if approved, would be subject to a REMS program, under the applicable FDA regulations and similar risk mitigation programs in other jurisdictions. REMS programs are costly and time-consuming for providers to comply with, involving high administrative burden, which could delay or limit our ability to commercialize our product candidates.

If there are changes in the application of legislation, regulations or regulatory policies, or if problems are discovered with our product candidates or our manufacture of an underlying product substance, or if we or one of our distributors, licensees or co-marketers fails to comply with regulatory requirements, the regulators could take various actions. These include imposing fines on us, imposing restrictions on the product or its manufacture and requiring us to recall or remove the product from the market. The regulators could also suspend or withdraw our marketing authorizations, require us to conduct additional clinical trials, change our product labeling or submit additional applications for marketing authorization. If any of these events occur, our ability to sell such product candidates may be impaired, and we may incur substantial additional expense to comply with regulatory requirements, which could materially adversely affect our business, financial condition and results of operations.

Our product candidates may have serious adverse, undesirable or unacceptable side effects which may delay or prevent marketing approval. If such side effects are identified during the development of DT120, DT402 or any other product candidates or following approval, if any, we may need to abandon our development or commercialization of such product candidates, the commercial profile of any approved label may be limited, or we may be subject to other significant negative consequences.

Undesirable side effects that may be caused by our product candidates could cause us or regulatory authorities to interrupt, delay or halt clinical trials or result in clinical holds and could result in a more restrictive label, a requirement that we implement a REMS plan to ensure that the benefits of the product candidates outweigh its risks, or the delay or denial of regulatory approval by the FDA or other comparable foreign authorities. We or regulatory authorities may also learn of and take similar actions based on side effects related to DT120, DT402, any other product candidates, or similar compounds in studies not conducted by us, including in IITs or studies conducted by other sponsors, from spontaneous reports of use of these compounds outside of the clinical trial setting or from safety reports in literature.

The results of future clinical trials may show that DT120, DT402 or any other product candidates cause undesirable or unacceptable side effects or even death. There can be no assurance that deaths or serious side effects will not occur, even in a clinical setting. In the event serious side effects occur, our trials could be suspended or terminated and the FDA or comparable foreign regulatory authorities could order us to cease further development of or deny approval of DT120, DT402 or any other product candidates for any or all targeted indications. Nonclinical toxicology studies may also delay or limit clinical development, for example, by limiting the dosing duration and dose interval in clinical trials. The drug-related side effects could affect patient recruitment or the ability of enrolled patients to complete the trial or result in potential product liability claims. Further, because of the high variability in how different individuals react to lysergide, certain patients may have negative experiences with the treatment that could subject us to liability or, if publicized, reputational harm. Any of these occurrences may harm our business, financial condition and prospects significantly.

Clinical trials are conducted in representative samples of the potential patient population which may have significant variability. Even if we receive regulatory approval for DT120, DT402 or any other product candidates, we will have tested them in only a limited number of patients during our clinical trials. Clinical trials are by design based on a limited number of patients and of limited duration for exposure to the product candidates used to determine whether, on a potentially statistically significant basis, the planned safety and efficacy of any such product candidate can be achieved. As with the results of any statistical sampling, we cannot be sure that all side effects of DT120, DT402 or any other product candidates may be uncovered, and it may be the case that only with a significantly larger number of patients exposed to such product candidate for a longer duration, may a more complete safety profile be identified. Further, even larger clinical trials may not identify rare serious adverse effects or the duration of such trials may not be sufficient to identify when those events may occur.

Additionally, if our product candidates receive marketing approval and we or others later identify undesirable or unacceptable side effects caused by such product candidates, a number of potentially significant negative consequences could result, including the following:

Any of these events could prevent us or our potential future collaborators from achieving or maintaining market acceptance of the affected product candidate or could substantially increase commercialization costs and expenses, which in turn could delay or prevent us from generating significant revenue from the sale of our product candidates.

Even if we obtain FDA approval for DT120, DT402 or any other product candidates, we may never obtain approval to commercialize any such product candidates outside of the United States, which would limit our ability to realize their full market potential.

In order to market any products outside of the United States, we must establish and comply with numerous and varying regulatory requirements of other countries or jurisdictions regarding safety and effectiveness. Clinical trials conducted in one country or jurisdiction may not be accepted by regulatory authorities in other countries or jurisdictions, and regulatory approval in one country does not mean that regulatory approval will be obtained in any other country. Approval processes vary among countries and can involve additional product testing and validation and additional or different administrative review periods from those in the United States, including additional preclinical studies or clinical trials, as clinical trials conducted in one jurisdiction may not be accepted by regulatory authorities in other jurisdictions. In many jurisdictions outside the United States, a product candidate must be approved for reimbursement before it can be approved for sale in that jurisdiction. In some cases, the price that we intend to charge for our products is also subject to approval.

Seeking foreign regulatory approval could result in difficulties and costs and require additional preclinical studies or clinical trials which could be costly and time-consuming. Regulatory requirements can vary widely from country to country and could delay or prevent the introduction of our product candidates in those countries. The foreign regulatory approval process may include all of the risks associated with obtaining FDA approval. We do not have any product candidates approved for sale in any jurisdiction, including international markets, and we do not have experience in obtaining regulatory approval in international markets for our product candidates. If we fail to comply with regulatory requirements in international markets or to obtain and maintain required approvals, or if regulatory approval in international markets is delayed, our target market will be reduced and our ability to realize the full market potential of our product candidates will be harmed.

There is a variety of risks associated with marketing our product candidates internationally, any of which could materially adversely affect our business.

We may seek regulatory approval of our product candidates outside of the United States and, accordingly, we expect that we will be subject to additional risks related to operating in foreign countries if we obtain the necessary approvals, including:

These and other risks associated with our international operations may materially adversely affect our ability to attain or maintain profitable operations.

Research and development of drugs targeting brain health disorders is particularly difficult, which makes it difficult to predict and understand why the drug has a positive effect on some patients but not others.

Discovery and development of new drugs targeting brain health disorders are particularly difficult and time-consuming, evidenced by the higher failure rate for new drugs for brain health disorders compared with most other areas of drug discovery. Any such setbacks in our clinical development could have a material adverse effect on our business and operating results. In addition, our later stage clinical trials may present challenges related to conducting adequate and well-controlled clinical trials, including designing an appropriate comparator arm in trials given the potential difficulties related to maintaining the blinding during the trial or placebo or nocebo effects.

Due to the complexity of the human brain and the central nervous system, it can be difficult to predict and understand why a drug, including DT120, DT402 or any other product candidates, may have a positive effect on some patients but not others and why some individuals may react to the drug differently from others. Moreover, most of the patients we treat in clinical trials with DT120 and MM110 (prior to when we paused development of MM110) have previously been treated with other drugs or therapies. All of these factors may make it difficult for us and any regulatory authority to assess the prior use or the overall efficacy of our product candidates, including DT120 and DT402, and may result in the termination of a development program, or delay or limit our ability to obtain regulatory approval.

We depend on enrollment of patients in our clinical trials for our product candidates. If we are unable to enroll patients in our clinical trials, our research and development efforts and business, financial condition and results of operations could be materially adversely affected.

Identifying and qualifying patients to participate in our clinical trials is critical to our success. Patient enrollment depends on many factors, including:

Even once enrolled, we may be unable to retain a sufficient number of patients to complete any of our trials.

In addition, any negative results we may report in clinical trials of DT120, DT402 or any other product candidates or results from companies investigating similar product candidates may make it difficult or impossible to recruit and retain patients in other clinical trials of that same product candidate. Delays in the enrollment for any clinical trial of DT120, DT402 or any other product candidates will likely increase our costs, slow down the approval process and delay or potentially jeopardize our ability to commence sales of our product candidates and generate revenue. In addition, some of the factors that cause, or lead to, a delay in the commencement or completion of clinical trials may also ultimately lead to the denial of regulatory approval of DT120, DT402 or any other product candidates.

We have never commercialized a product candidate before and may lack the necessary expertise, personnel and resources to successfully commercialize our product candidates on our own or with suitable collaborators.

While we are currently assembling a sales and marketing infrastructure, we have limited organizational experience in the sale or marketing of products. To achieve commercial success for any approved product candidates, we must develop or acquire a sales and marketing organization, outsource these functions to third parties or enter into partnerships.

If our product candidates are approved for commercial sale, we plan on establishing our own market access and commercialization capabilities in primary markets in North America and in the EU. In select geographies, we might also consider relying on the support of a contract sales organization (“CSO”), or enter into commercialization arrangements with companies with relevant commercialization capabilities. There are risks involved in establishing our own sales and marketing capabilities, as well as with entering into arrangements with third parties to perform these services. Even if we establish sales and marketing capabilities, we may fail to launch our product candidates effectively or to market our product candidates effectively since we have limited organizational experience in the sales and marketing of products. In addition, recruiting and training a sales force is expensive and time-consuming, and could delay any product launch. In the event that any such launch is delayed or does not occur for any reason, we would have prematurely or unnecessarily incurred these commercialization expenses, and our investment would be lost if we cannot retain or reposition our sales and marketing personnel. Factors that may inhibit our efforts to commercialize our product candidates on our own include:

If we enter into arrangements with third parties to perform market access and commercial services for any approved product candidates, the revenue or the profitability of these revenues to us could be lower than if we were to commercialize any product candidates that we develop ourselves. Such collaborative arrangements may place the commercialization of any approved product candidates outside of our control and would make us subject to a number of risks including that we may not be able to control the amount or timing of resources that our collaborative partner devotes to our product candidates or that our collaborator’s willingness or ability to complete its obligations, and our obligations under our arrangements may be adversely affected by business combinations or significant changes in our collaborator’s business strategy. We may not be successful in entering into arrangements with third parties to commercialize our product candidates or may be unable to do so on terms that are favorable to us. Acceptable third parties may fail to devote the necessary resources and attention to commercialize our product candidates effectively, to set up sufficient number of treatment centers in third-party treatment sites, or to recruit, train and retain adequate number of HCPs to administer our product candidates.

If we do not establish commercial capabilities successfully, either on our own or in collaboration with third parties, we may not be successful in commercializing our product candidates, which in turn would have a material adverse effect on our business, prospects, financial condition and results of operations.

The future commercial success of our product candidates will depend on the degree of market access and acceptance of our product candidates, if approved, among healthcare professionals, patients, healthcare payors, health technology assessment bodies and the medical community at large.

We may never have a product candidate that is commercially successful. To date, we have no product candidates authorized for marketing. Our product candidates require further clinical investigation, regulatory review, significant market access and marketing efforts and substantial investment before they can produce any revenue. Furthermore, if approved, our product candidates may not achieve an adequate level of acceptance by payors, health technology assessment bodies, healthcare professionals, patients

and the medical community at large, and we may not become profitable. The level of acceptance we ultimately achieve may be affected by negative public perceptions and media coverage of psychedelic substances, including lysergide and MDMA. Because of this history, efforts to educate the medical community and third-party payors and health technologies assessment bodies on the benefits of product candidates may require significant resources and may never be successful, which would prevent us from generating significant revenue or becoming profitable. Market acceptance of our product candidates by healthcare professionals, patients, healthcare payors and health technology assessment bodies will depend on a number of factors, many of which are beyond our control, including, but not limited to, the following:

If our product candidates fail to gain or maintain market access and acceptance, this will have a material adverse impact on our ability to generate revenue to provide a satisfactory, or any, return on our investments. Even if some product candidates achieve market access and acceptance, the market may prove not to be large enough to allow us to generate significant revenue.

Our business and commercialization strategy depends on our ability to identify, qualify, prepare, certify and support third-party treatment sites offering any approved product candidate. If we are unable to do so, our commercialization prospects would be limited and our business, financial condition and results of operations would be harmed.

If we are able to commercialize our product candidates, our success will be dependent upon our ability to identify, qualify, prepare, certify and support third-party treatment sites that can offer and administer our product candidates. Our commercial model of delivering our product candidates will also involve third-party HCPs before, during and after the administration session, which will be hosted in one of the third-party treatment sites. We intend to commercialize our product candidates by building close relationships with qualified third-party treatments sites where these HCPs will administer our product candidates. Because we intend to work only with third-party sites and providers who agree to adhere strictly to the administration protocols described in labeling or a REMS program, we may face limitations on the number of sites available to administer our product candidates. Any such limitations could make it impracticable or impossible for some potential patients to access our product candidates, if approved, which could limit the overall size of our potential patient population and harm the results of our future operations. Although we plan to train and certify such third-party treatment sites, conduct further research on and continuously improve our administration protocols, we expect this to involve significant costs, time and resources, and our efforts may not be successful.

If we are unable to establish a sufficient network of third-party treatment sites certified under applicable standards, including regional, national, state or other applicable standards as needed to administer our product candidates, including the certifications that such third-party treatment sites may require, it would have a material adverse effect on our business and ability to grow and would adversely affect our results of operations and commercialization efforts. We expect the HCPs to be employed by the third-party treatment sites where the HCPs administer our product candidates. Third-party treatment sites could, for a number of reasons, demand higher payments for our product candidates or take other actions to increase their income from selling our product candidates, which could result in higher costs for payors and for our patients to get access to our product candidates. For example, legal regimes may require higher levels of licensure which force us to contract with third-party treatment sites that demand higher payment rates to administer our product candidates. In addition, third-party treatment sites may have difficulty meeting regulatory or accreditation requirements.

Given the novel nature of our product candidates, third-party treatment sites may face additional financial and administrative burdens in order to deliver any approved product candidate, including adhering to a REMS program in the United States or a Risk Management Plan (“RMP”) in the EU. The process for a third-party treatment site to become certified under a REMS program can be very costly and time-consuming, which could delay a third-party treatment site’s ability to provide our product candidates and materially adversely affect our commercialization trajectory. Furthermore, third-party treatment sites will need to ensure that they have the necessary infrastructure and equipment in order to deliver our product candidates, such as adequate audio-visual equipment, ancillary equipment and sufficient administration rooms. This may deter third-party treatment sites from providing our product candidates and reduce our ability to expand our network and generate revenue. Our ability to develop and maintain satisfactory relationships with third-party treatment sites may otherwise be negatively impacted by other factors not associated with our operations and, in some instances, outside of our direct or indirect control, such as negative perceptions regarding the product use of lysergide, MDMA or other substances we use in our product candidates, changes in Medicare and/or Medicaid or commercial payors reimbursement levels and other pressures on HCPs and consolidation activity among hospitals, physician groups and the providers. Reimbursement levels may be inadequate to cover third-party treatment sites’ costs of delivering our product candidates. The failure to maintain or to secure new cost-effective contracts with third-party treatment sites may result in a loss of or inability to grow our network of third-party treatment sites, patient base, higher costs to our patients and us, HCP network disruptions and/or difficulty in meeting regulatory or accreditation requirements, any of which could have a material adverse effect on our business, financial condition and results of operations.

We currently rely on qualified HCPs working at third-party clinical trial sites to administer our product candidates in our clinical trials and we expect this to continue upon approval, if any, of DT120, DT402 or any other product candidates. If third-party sites fail to recruit and retain a sufficient number of HCPs or effectively oversee their HCPs, our business, financial condition and results of operations would be materially harmed.

We currently administer our product candidates in our clinical trials through qualified third-party HCPs working at third-party clinical trial sites. However, there are currently not enough trained HCPs to carry out our product candidates at a commercial scale, and our efforts to facilitate training and certification programs for HCPs may be unsuccessful.

While we currently provide training to the HCPs and expect to continue providing trainings in the future (either directly or indirectly through third-party providers), we do not currently employ the HCPs who deliver our product candidates to patients and do not intend to do so in the future. Such HCPs are typically employed by third-party treatment sites. If our product candidates are approved for commercialization, third-party treatment sites may demand substantial financial resources from us to recruit and retain

a team of qualified HCPs to administer our product candidates. If the third-party treatment sites fail to recruit, train and retain a sufficient number of HCPs, our ability to offer and administer our product candidates will be greatly harmed, which may in turn reduce the market acceptance rate of our product candidates. If this occurs, our commercialization prospects would be negatively affected and our business, financial condition and results of operations would be harmed.

Although we currently provide training and expect to continue providing training to the HCPs (directly or through third-party providers), we generally rely on qualified and certified third-party treatment sites to manage the HCPs and monitor the administration of our product candidates and ensure that the administration process of our product candidates comply with dosing session guidelines. However, if not properly managed and supervised, there is a risk that HCPs may deviate from our dosing session guidelines, fail to follow the guidelines we have established, or abuse patients during administration sessions.

We may become exposed to costly and damaging liability claims, either when testing our product candidates in the clinic or at the commercial stage, and our product liability insurance may not cover all damages from such claims.

We are exposed to potential product liability and professional indemnity risks that are inherent in the research, development, manufacturing, marketing and use of product substances. Currently, we have no product candidates that have been approved for commercial sale; however, the use of our product candidates by us and our corporate collaborators in clinical trials, and the potential sale of any approved product candidates in the future, may expose us to liability claims. These claims might be made by patients who use our product candidates, HCPs, pharmaceutical companies, our corporate collaborators or other third parties that sell our product candidates. Any claims against us, regardless of their merit, could be difficult and costly to defend and could materially adversely affect the market for our product candidates or any prospects for commercialization of our product candidates. Although the clinical trial process is designed to identify and assess potential side effects, it is always possible that a drug, even after regulatory approval, may exhibit unforeseen side effects. If DT120, DT402 or any other product candidates cause adverse side effects during clinical trials or after regulatory approval, we may be exposed to substantial liabilities. Physicians and patients may not comply with warnings that identify known potential adverse effects and describe which patients should not use DT120, DT402 or any other product candidates. Regardless of the merits or eventual outcome, liability claims may cause, among other things, the following:

It is possible that our liabilities could exceed our insurance coverage. We intend to expand our insurance coverage to include the sale of commercial products if we obtain marketing approval for our product candidates. However, we may not be able to maintain insurance coverage at a reasonable cost or obtain insurance coverage that will be adequate to satisfy any liability that may arise. If a successful product liability claim or series of claims is brought against us for uninsured liabilities or in excess of insured liabilities, our assets may not be sufficient to cover such claims and our business, financial condition and results of operations could be materially adversely affected.

Liability claims resulting from any of the events described above could have a material adverse effect on our business, financial condition and results of operations.

Risks Related to Regulatory Approval and other Legal Compliance Matters

Lysergide, MDMA and other compounds used in our product candidates are listed as Schedule I controlled substances under the CSA in the U.S., and similar controlled substance legislation in other countries and any significant breaches in our compliance with these laws and regulations, or changes in the laws and regulations may result in interruptions to our development activity or business continuity.

Lysergide, MDMA and other compounds used in our product candidates are categorized as Schedule I controlled substances under the CSA, and are similarly categorized by most states and foreign governments. Even assuming that DT120, DT402 or any other product candidates containing lysergide, MDMA and other Schedule I controlled substances are approved and rescheduled by regulatory authorities to allow their commercial marketing, the ingredients in such product candidates could continue to be Schedule I, or the state or foreign equivalent. Violations of any U.S. federal, state, local or foreign laws or and regulations could result in significant fines, penalties, administrative sanctions, convictions or settlements arising from civil proceedings conducted by either the federal government or private citizens, or criminal charges and penalties, including, but not limited to, disgorgement of profits, cessation of business activities, divestiture, or prison time. This could have a material adverse effect on us, including on our reputation and ability to conduct our business, our financial position, operating results, profitability or liquidity or the market price of our publicly traded common shares. In addition, it is difficult for us to estimate the time or resources that would be needed for the investigation, defense or resolution of any such matters because, in part, the time and resources that may be needed are dependent on the nature and extent of any information requested by the applicable authorities involved, and such time or resources could be substantial. It is also illegal to aid or abet such activities or to conspire or attempt to engage in such activities.

Various federal, state, provincial and local laws govern our business in the jurisdictions in which we operate or currently plan to operate, and to which we export or currently plan to export our product candidates, including laws relating to health and safety, the conduct of our operations, and the production, storage, sale and distribution of our product candidates. Complying with these laws requires that we comply concurrently with complex federal, state, provincial and/or local laws. These laws change frequently and may be difficult to interpret and apply. To comply with these laws, we will need to invest significant financial and managerial resources. It is impossible for us to predict the cost of compliance with such laws or the effect they may have on our future operations. A failure to comply with these laws could negatively affect our business and harm our reputation. Changes to these laws could negatively affect our competitive position and the markets in which we operate, and there is no assurance that various levels of government in the jurisdictions in which we operate will not pass legislation or regulation that adversely impacts our business.

In addition, even if we or third parties were to conduct activities in compliance with U.S. federal, state or local laws or other foreign laws in which we conduct activities, potential enforcement proceedings could involve significant restrictions being imposed upon us or third parties, while diverting the attention of key executives. Such proceedings could have a material adverse effect on our business, revenue, operating results and financial condition as well as on our reputation and prospects, even if such proceedings conclude successfully in our favor. In the extreme case, such proceedings could ultimately involve the criminal prosecution of our key executives, the seizure of corporate assets, and consequently, our inability to continue business operations. Strict compliance with U.S. federal, state and local laws or other foreign laws and with respect to Schedule I substances, such as lysergide and MDMA does not absolve us of potential liability under U.S. federal, state and local laws or other foreign laws, nor provide a defense to any proceeding which may be brought against us. Any such proceedings brought against us may adversely affect our operations and financial performance.

Disruptions at the FDA, including due to a reduction in the FDA’s workforce, inadequate funding for the FDA or a shutdown of the federal government, could prevent the FDA from performing normal functions on which our business relies, which could negatively impact our business.

The ability of the FDA to review and approve new products or review other regulatory submissions can be affected by a variety of factors, including statutory, regulatory and policy changes, inadequate government budget and funding levels or a reduction in the FDA’s workforce and its ability to hire and retain key personnel. Such changes and other disruptions at the FDA may increase the time to meet with the FDA and receive FDA feedback, review and/or approve our submissions, conduct inspections, issue regulatory guidance, or take other actions that facilitate the development, approval and marketing of regulated products, which would adversely affect our business. In addition, government proposals to reduce or eliminate budgetary deficits may include reduced allocations to the FDA and other related government agencies. For example, in January 2025, the executive branch established the Department of Government Efficiency, which implemented a federal government hiring freeze and took certain additional efforts to reduce federal government employee headcount and the size of the federal government, including significantly reducing federal health agencies’ workforce. It is unclear how these executive actions or other potential actions by the executive branch or other parts of the federal government will impact FDA operations or other regulatory authorities that oversee our business. Budgetary pressures may reduce the FDA’s ability to perform its responsibilities. In December 2024 and January 2025, we initiated our first and second Phase 3 clinical trials for our lead product candidate, DT120 ODT for the treatment of adults with GAD, and in

April 2025, we initiated our first Phase 3 clinical trial for DT120 ODT in MMD. The significant reduction in the FDA’s workforce, constraints in the FDA’s budget, or a prolonged government shutdown could impact the ability of the FDA to timely review and process our regulatory submissions or take other actions critical to the development or marketing of MMD120 ODT, if approved, which could have a material adverse effect on our business.

Our business operations and our relationships with investigators, healthcare professionals, consultants, third-party payors and customers are currently or will be subject to U.S. federal and state healthcare fraud and abuse laws, false claims laws, health information privacy and security laws, other healthcare laws and regulations and other foreign privacy and security laws. If we are unable to comply, or have not fully complied, with such laws, we could face substantial penalties.

Although we do not currently have any products on the market, our relationships with investigators, healthcare professionals, customers and third-party payors, subject us to various U.S. federal and state healthcare laws and regulations, including, without limitation, the U.S. federal Anti-Kickback Statute. HCPs, physicians and others play a primary role in the recommendation and prescription of any product candidates for which we obtain marketing approval. These laws impact, among other things, our research activities and proposed sales, marketing and education programs and constrain our business and financial arrangements and relationships with third-party payors, healthcare professionals who participate in our clinical research program, healthcare professionals and others who recommend, purchase, or provide our approved product candidates, and other parties through which we market, sell and distribute our product candidates for which we obtain marketing approval. In addition, we may be subject to patient data privacy and security regulation by both the U.S. federal government and the states in which we conduct our business, along with foreign regulators (including European data protection authorities). Finally, our current and future operations are subject to additional healthcare-related statutory and regulatory requirements and enforcement by foreign regulatory authorities in jurisdictions in which we conduct our business. These laws include, but are not limited to, the following:

The distribution of pharmaceutical products is subject to additional requirements and regulations, including licensing, extensive record-keeping, storage and security requirements intended to prevent the unauthorized sale of pharmaceutical products.

The scope and enforcement of each of these laws is uncertain and subject to rapid change in the current environment of healthcare reform. Federal and state enforcement bodies have recently increased their scrutiny of interactions between healthcare companies and HCPs, which has led to a number of investigations, prosecutions, convictions and settlements in the healthcare industry. Even if precautions are taken, it is possible that governmental authorities will conclude that our business practices may not comply with current or future statutes, regulations or case law involving applicable fraud and abuse or other healthcare laws and regulations. If our operations are found to be in violation of any of these laws or any other governmental regulations that may apply to us, we may be subject to significant civil, criminal and administrative penalties, damages, fines, disgorgement, imprisonment, exclusion of drugs from government funded healthcare programs, such as Medicare and Medicaid, additional reporting requirements and oversight if we become subject to a corporate integrity agreement or similar agreement to resolve allegations of non-compliance with these laws, reputational harm and the curtailment or restructuring of our operations. If any of the physicians or other HCPs or entities with whom we expect to do business is found not to be in compliance with applicable laws, that person or entity may be

subject to significant criminal, civil or administrative sanctions, including exclusions from government funded healthcare programs. Prohibitions or restrictions on sales or withdrawal of future marketed products could materially affect business in an adverse way.

Efforts to ensure that our business arrangements with third parties will comply with applicable healthcare laws and regulations will involve substantial costs. Any action against us for violation of these laws, even if we successfully defend against it, could cause us to incur significant legal expenses, reputational harm, and divert our management’s attention from the operation of our business. The shifting compliance environment and the need to build and maintain robust and expandable systems to comply with multiple jurisdictions with different compliance or reporting requirements increases the possibility that a healthcare company may run afoul of one or more of the requirements.

We are subject to stringent and changing obligations related to data privacy and security. Our actual or perceived failure to comply with such obligations could lead to regulatory investigations or actions; litigation, fines and penalties; disruptions of our business operations, reputational harm, loss of revenue or profits, loss of customers or sales, and other adverse business consequences.

In the ordinary course of business, we process personal information and other sensitive information, including proprietary and confidential business information, trade secrets, intellectual property, information we collect about trial participants in connection with clinical trials (such as date of birth and initials), employee data, and sensitive third-party information. Our information processing activities subject us to numerous data privacy and security obligations, such as various laws, regulations, guidance, industry standards, external and internal privacy and security policies, contracts, and other obligations that govern the processing of personal information by us and on our behalf.

In the United States, federal, state, and local governments have enacted numerous data privacy and security laws, including data breach notification laws, personal information privacy laws, and consumer protection laws. For example, HIPAA imposes specific requirements relating to the privacy, security, and transmission of individually identifiable health information. Depending on the facts and circumstances, we could potentially be subject to significant civil and criminal penalties if we, or our agents knowingly receive individually identifiable health information maintained by a HIPAA-covered entity in a manner that is not authorized or permitted by HIPAA and subject to other civil and/or criminal penalties if we obtain, use, disclose, or retain information in a manner not permitted by other privacy and data security consumer protection laws.

Additionally, the California Consumer Privacy Act of 2018 (“CCPA”) imposes obligations on businesses to which it applies. These obligations include, but are not limited to, data minimization obligations, providing specific disclosures in privacy notices and affording California consumers certain rights related to their personal information. The CCPA allows for statutory fines for noncompliance (up to $7,500 per violation) and includes a private right of action for certain data breaches. Nearly two dozen other states have enacted similar privacy laws or laws that broadly govern health data. These laws impose new obligations or limitations in areas affecting our business and we continue to assess the impact of these state legislation, on our business as additional information and guidance becomes available. Many states have also used existing consumer protection statutes to regulate companies’ collection, use, and disclosure of personal information. If we become subject to these or other data privacy laws at the state, local or federal level, the risk of enforcement action against us could increase because we may become subject to additional obligations, and the number of individuals or entities that can initiate actions against us may increase (including individuals, via a private right of action, and regulators).

Outside the United States, an increasing number of laws, regulations, and industry standards apply to data privacy and security. For example, in Canada, the Personal Information Protection and Electronic Documents Act and various related provincial laws, as well as Canada’s Anti-Spam Legislation, may apply to our operations. In addition, the EU GDPR and the United Kingdom’s GDPR impose strict requirements for processing the personal information of individuals. For example, under the EU GDPR, government regulators may impose warnings or compliance orders, as well as fines of up to 20 million Euros or 4% of annual global revenue for the preceding financial year, whichever is greater. Further, individuals may initiate litigation related to our processing of their personal information. The EU GDPR also provides that EU Member States may make their own further laws and regulations in relation to the processing of genetic, biometric or health information, which could result in differences between Member States, limit our ability to use and share personal information or could cause our costs to increase, and harm our business and financial condition.

Certain jurisdictions have enacted data localization laws and cross-border personal information transfer laws. For example, absent appropriate safeguards or other circumstances, the EU GDPR generally restricts the transfer of personal information to countries outside of the EEA. The European Commission released a set of “Standard Contractual Clauses” that are designed to be a valid mechanism by which entities can transfer personal information out of the EEA to jurisdictions that the European Commission has not found to provide an adequate level of protection. Currently, these Standard Contractual Clauses are a valid mechanism to

transfer personal information outside of the EEA. The Standard Contractual Clauses, however, require parties that rely upon that legal mechanism to comply with additional obligations, such as conducting transfer impact assessments to determine whether additional security measures are necessary to protect the at-issue personal information. Moreover, due to potential legal challenges, there exists some uncertainty regarding whether the Standard Contractual Clauses will remain a valid mechanism for transfers of personal information out of the EEA. On July 10, 2023, the European Commission adopted its adequacy decision for the EU-U.S. Data Privacy Framework. Under this framework, personal data can flow freely from the EU to U.S. companies that participate in the Data Privacy Framework. Laws in the UK also restrict transfers of personal information outside of those jurisdictions to countries such as the United States that do not provide an adequate level of personal information protection. If we cannot implement a valid compliance mechanism for cross-border information transfers, we may face increased exposure to regulatory actions, substantial fines, and injunctions against processing or transferring personal information from Europe or elsewhere. The inability to import personal information to the United States could significantly and negatively impact our business operations, including by limiting our ability to conduct clinical trial activities in Europe and elsewhere; limiting our ability to collaborate with parties that are subject to European and other data privacy and security laws; or requiring us to increase our personal information processing capabilities and infrastructure in Europe and/or elsewhere at significant expense. Further, the EU and UK data protection laws (including laws on data transfers) may be updated/revised, accompanied by new guidance and/or judicial/regulatory interpretations which could entail further impacts on our compliance efforts and increased cost.

We are obligated to adhere to our contractual obligations and representations made in our policies related to data privacy and security. We may publish privacy policies, marketing materials and other statements, such as compliance with certain certifications or self-regulatory principles, regarding data privacy and security. If these policies, materials or statements are found to be deficient, lacking in transparency, deceptive, unfair, or misrepresentative of our practices, we may be subject to investigation, scrutiny and enforcement actions by regulators or other adverse consequences, including litigation by private parties. Additionally, we may also be bound by contractual obligations related to data privacy and security with our partners or CROs, and our efforts to comply with such obligations may not be successful.

Laws, regulations, standards and related to data privacy and security are quickly changing, creating some uncertainty as to the effective future legal framework and our obligations. Additionally, these obligations may be subject to differing applications and interpretations, which may be inconsistent or in conflict among jurisdictions. Preparing for and complying with these obligations requires us to devote significant resources (including, without limitation, financial and time-related resources). These obligations may necessitate changes to our information technologies, systems, and practices and to those of any third parties that process personal information on our behalf. In addition, these obligations may require us to change our business model. Although we endeavor to comply with all applicable data privacy and security obligations, we may at times not meet all obligations (or be perceived to have not met our obligations). Moreover, despite our efforts, our personnel or third parties upon whom we rely may fail to comply with such obligations, which could negatively impact our business operations and compliance posture. For example, any failure by a third-party processor to comply with applicable law, regulations, or contractual obligations could result in adverse effects, including inability to operate our business and proceedings against us by governmental entities or others.

There can be no assurance that the systems we have designed to prevent or limit the effects of cyber incidents or attacks will be sufficient to prevent or detect material consequences arising from such incidents or attacks, or to avoid a material adverse impact on our systems after such incidents or attacks do occur. We rely on third party vendors and service providers to support various aspects of our business operations. However, these third parties may pose risks related to data security, compliance, and contractual obligations. A breach or failure by a third party to adequately protect our data could have adverse consequences for our business and reputation.

If we fail, or are perceived to have failed, to address or comply with data privacy and security obligations, we could face significant consequences. These consequences may include, but are not limited to, government scrutiny or enforcement actions (e.g., investigations, fines, civil and criminal penalties (including imprisonment of company officials), audits, inspections, and similar); litigation (including class-related claims); additional reporting requirements and/or oversight; restrictions on processing personal information; orders to destroy or not use personal information; and imprisonment of company officials. Any of these events could have a material adverse effect on our reputation, business, or financial condition, including: loss of customers; interruptions or stoppages in our business operations (including, as relevant, clinical trials); inability to process personal information or to operate in certain jurisdictions; limited ability to develop or commercialize our products; expenditure of time and resources to defend any claim or inquiry; adverse publicity; or revision or restructuring of our operations.

The successful commercialization of our product candidates will depend in part on the extent to which governmental authorities and health insurers establish adequate reimbursement levels and pricing policies. Failure to obtain or maintain

adequate coverage and reimbursement for our product candidates, if approved, could limit our ability to market those product candidates and decrease our ability to generate revenue.

The availability and adequacy of coverage and reimbursement by governmental healthcare programs such as Medicare and Medicaid, private health insurers and other third-party payors are essential for most patients to be able to afford our product candidates, if approved. Our products must be scheduled as a Schedule II or lower controlled substance (i.e., Schedule III, IV or V) before they can be commercially marketed. Our ability to achieve acceptable levels of coverage and reimbursement for product candidates by governmental authorities, private health insurers and other organizations will have an effect on our ability to successfully commercialize and attract additional collaboration partners to invest in the development of our product candidates. There is limited clinical data on the long-term efficacy of lysergide or MDMA on treating brain health disorders. Certain patients may need repeated treatments over their lifetime to avoid or re-treat a relapse of their disorder. This may increase treatment costs, making it more difficult for us to secure reimbursement. Even if we obtain coverage for a given product candidate by third-party payors, the resulting reimbursement payment rates may not be adequate or may require patient out-of-pocket costs that patients may find unacceptably high. We cannot be sure that coverage and reimbursement in the United States or elsewhere will be available for any product candidate that we may develop, and any reimbursement that may become available may be decreased or eliminated in the future.

Third-party payors are increasingly challenging prices charged for product substances and services, and many third-party payors may refuse to provide coverage and reimbursement for particular drugs when an equivalent generic drug or a less expensive product candidate is available. It is possible that a third-party payor may consider our current product candidates as substitutable and only offer to reimburse patients for the less expensive drugs. Even if we show improved efficacy or improved convenience of administration with our product candidates, pricing of existing drugs may limit the amount we will be able to charge. These payors may deny or revoke the reimbursement status of a given drug product or establish prices for new or existing marketed therapies at levels that are too low to enable us to realize an appropriate return on our investment in product development. If reimbursement is not available or is available only at limited levels, we may not be able to successfully commercialize our product candidates and may not be able to obtain a satisfactory financial return on product candidates that we may develop.

Government authorities and other third-party payors, such as private health insurers and health maintenance organizations, decide which drugs and treatments they will cover and the amount of reimbursement. Coverage and reimbursement by a third-party payor may depend upon a number of factors, including the third-party payor’s determination that use of a product is:

There is significant uncertainty related to the insurance coverage and reimbursement of newly approved therapies. In the United States, third-party payors, including private and governmental payors, such as the Medicare and Medicaid programs, play an important role in determining the extent to which new drugs will be covered. The Medicare and Medicaid programs increasingly are used as models for how private payors and other governmental payors develop their coverage and reimbursement policies for drugs. Some third-party payors may require pre-approval of coverage for new or innovative devices or drug therapies before they will reimburse healthcare providers who use such therapies. It is difficult to predict at this time what third-party payors will decide with respect to the coverage and reimbursement for our product candidates.

Obtaining and maintaining reimbursement status is time-consuming and costly. No uniform policy for coverage and reimbursement for drug therapies exists among third-party payors in the United States. Therefore, coverage and reimbursement for drug therapies can differ significantly from payor to payor. As a result, the coverage determination process is often a time-consuming and costly process that will require us to provide scientific and clinical support for the use of our product candidates to each payor separately, with no assurance that coverage and adequate reimbursement will be applied consistently or obtained in the first instance. Furthermore, rules and regulations regarding reimbursement change frequently, in some cases at short notice, and we believe that changes in these rules and regulations are likely.

We intend to seek approval to market DT120, DT402 and other product candidates in both the United States and in selected foreign jurisdictions. If we obtain approval in one or more foreign jurisdictions for our product candidates, we will be subject to rules and regulations in those jurisdictions.

In some foreign countries, particularly certain countries in Europe, the pricing of drugs is subject to governmental control and other market regulations which could put pressure on the pricing and usage of our product candidates. In these countries, pricing negotiations with governmental authorities can take considerable time after obtaining marketing approval of a product candidate. In addition, market acceptance and sales of our product candidates will depend significantly on the availability of adequate coverage and reimbursement from third-party payors for our product candidates and may be affected by existing and future healthcare reform measures.

Outside the United States, international operations are generally subject to extensive governmental price controls and other market regulations, and we believe the increasing emphasis on cost-containment initiatives in Europe, and other countries has and will continue to put pressure on the pricing and usage of our product candidates. In many countries, the prices of medical therapies are subject to varying price control mechanisms as part of national health systems. Other countries allow companies to fix their own prices for medical therapies but monitor and control company profits. Additional foreign price controls or other changes in pricing regulation could restrict the amount that we are able to charge for our product candidates. Accordingly, in markets outside the United States, the reimbursement for our product candidates may be reduced compared with the United States and may be insufficient to generate commercially reasonable revenue and profits.

The delivery of healthcare in the EU, including the establishment and operation of health services and the pricing and reimbursement of medicines, is almost exclusively a matter for national, rather than EU-wide, law and policy. The medicines regulatory regime in respect of the EU applies to the EEA, which comprises the EU Member States as well as Norway, Iceland and Liechtenstein. National governments and health service providers have different priorities and approaches to the delivery of healthcare and the pricing and reimbursement of therapies in that context. In general, however, the healthcare budgetary constraints in many EU Member States have resulted in restrictions on the pricing and reimbursement of medicines by relevant health service providers. Coupled with increasing EU and national regulatory burdens on those wishing to develop and market therapies, this could prevent or delay marketing approval of our product candidates, restrict or regulate post-approval activities and affect our ability to commercialize any product candidates for which we obtain marketing approval.

EU pharmaceutical legislation may materially affect our ability to market and receive coverage for our product candidates in the EU Member States. On April 26, 2023, the European Commission adopted a proposal for a new Directive and a new Regulation to revise and replace the existing EU pharmaceutical legislation (the Regulation 726/2004 and the Directive 2001/83/EC) and the legislation on medicines for children and for rare diseases (Regulation 1901/2006 and Regulation 141/2000, respectively). In December 2025, the Council and the European Parliament reached an agreement on the legislative reform. The final text of the reform proposal is expected to be endorsed and published in the first or second quarter of 2026 and, after a transition period, the new legislation is expected to start to apply from mid-2028.

Much like the federal Anti-Kickback Statute prohibition in the United States, the provision of benefits or advantages to physicians to induce or encourage the prescription, recommendation, endorsement, purchase, supply, order or use of medicinal therapies is also prohibited in the EU. The provision of benefits or advantages to induce or reward improper performance generally is governed by the national anti-bribery laws of EU Member States, and in respect of the UK (which is no longer a member of the EU), the Bribery Act 2010. Infringement of these laws could result in substantial fines and imprisonment. EU Directive 2001/83/EC, which is the EU Directive governing medicinal products for human use, further provides that, where medicinal products are being promoted to persons qualified to prescribe or supply them, no gifts, pecuniary advantages or benefits in kind may be supplied, offered or promised to such persons unless they are inexpensive and relevant to the practice of medicine or pharmacy. This provision has been transposed into the Human Medicines Regulations 2012 and so remains applicable in the UK despite its departure from the EU.

Payments made to physicians and other healthcare professionals in certain EU Member States must be publicly disclosed. Moreover, agreements with physicians often must be the subject of prior notification and approval by the physician’s employer, his or her competent professional organization and/or the regulatory authorities of the individual EU Member States. These requirements are provided in the national laws, industry codes or professional codes of conduct, applicable in individual EU Member States and the particular requirements can therefore vary widely amongst the EU Member States. Failure to comply with these requirements could result in reputational risk, public reprimands, administrative penalties, fines or imprisonment. There are currently no statutory disclosure requirements for transfers of value to physicians and other healthcare professionals in the UK; however, the UK Government has confirmed it will introduce new guidance on best practice for disclosure requirements. Industry codes in the UK already require members of these industry associations to disclose certain transfers of value.

In addition, in most foreign countries, including in many EU Member States, the proposed pricing for a drug must be approved before it may be lawfully marketed. The requirements governing drug pricing and reimbursement vary widely from country to country. For example, individual EU Member States could restrict the range of medicinal products for which their national health insurance systems provide reimbursement and to control the prices of medicinal products for human use. Reference pricing used by various EU Member States and parallel distribution, or arbitrage between low-priced and high-priced member states, can further reduce prices. An EU Member State may approve a specific price for the medicinal product, or it may instead adopt a system of direct or indirect controls on the profitability of the company placing the medicinal product on the market. In some countries, we may be required to conduct a clinical study or other studies that compare the cost- effectiveness of our product candidates to other available therapies in order to obtain or maintain reimbursement or pricing approval. Moreover, the HTA of medicinal products is becoming an increasingly common part of the pricing and reimbursement procedures in some EU Member States. The outcome of an HTA will often influence the pricing and reimbursement status granted to these medicinal products by the competent authorities of individual EU Member States. The extent to which pricing and reimbursement decisions are influenced by the HTA of the specific medicinal product currently varies between EU Member States. It is difficult to predict at this time what third party payors and governmental authorities will decide with respect to the coverage and reimbursement for our product candidates.

There can be no assurance that any country that has price controls or reimbursement limitations for biopharmaceutical products will allow favorable reimbursement and pricing arrangements for any of our product candidates. Historically, therapies launched in the EU and UK do not follow price structures of the United States and generally prices tend to be significantly lower. Publication of discounts by third-party payors or authorities may lead to further pressure on the prices or reimbursement levels within the country of publication and other countries. If pricing is set at unsatisfactory levels or if reimbursement of our product candidates is unavailable or limited in scope or amount, our revenue from sales and the potential profitability of our product candidates in those countries would be negatively affected.

Moreover, increasing efforts by governmental and third-party payors in the EU, the UK, the United States and elsewhere to cap or reduce healthcare costs may cause such organizations to limit coverage and the level of reimbursement for newly approved therapies and, as a result, they may not cover or provide adequate payment for our product candidates. In international markets, reimbursement and healthcare payment systems vary significantly by country, and many countries have instituted price ceilings on specific therapies. We expect to experience pricing pressures in connection with the sale of our product candidates due to the trend toward managed healthcare, the increasing influence of health maintenance organizations and additional legislative changes. The downward pressure on healthcare costs in general, particularly prescription drugs and surgical procedures and other treatments, has become very intense. As a result, increasingly high barriers are being erected to the entry of new therapies.

Enacted and future legislation may increase the difficulty of commercializing our product candidates and affect the prices we may charge for such product candidates.

There has been increasing legislative and enforcement interest in the United States with respect to specialty drug pricing practices. Among other things, there have been several recent U.S. Congressional inquiries, Presidential executive orders, and proposed and enacted federal and state legislation designed to, among other things, bring more transparency to drug pricing, reduce the cost of prescription drugs under Medicare, review the relationship between pricing and manufacturer patient programs, and reform government program reimbursement methodologies for drugs. For example, the IRA, among other things, (1) directs HHS to negotiate the price of certain units of certain single-source drugs and biologics covered under Medicare, (2) imposes certain rebates under Medicare Part B and Medicare Part D to penalize price increases that outpace inflation, and (3) makes changes to the Medicare Part D benefit, including a limit on annual out-of-pocket costs, and replaces the existing coverage gap discount program that was first enacted as part of the ACA,under which manufacturers agreed to offer point-of-sale discounts off negotiated prices of applicable brand drugs to eligible beneficiaries during the coverage gap period, with a new Part D Manufacturer Discount Program, which began in 2025. Under the Manufacturer Discount Program, manufacturers are, in general, required to provide a 10% discount on a covered Part D drug where a beneficiary is in the initial phase of Part D coverage and a 20% discount where a beneficiary is in the catastrophic phase of Part D coverage. These provisions took effect in fiscal year 2023 and are expected to have a significant impact on the pharmaceutical industry, and have been subject to legal challenges. Any reduction in reimbursement from Medicare or other government programs may result in a similar reduction in payments from private payors.

On July 4, 2025, the “One Big Beautiful Bill Act” (“OBBBA”) was signed into law. The OBBBA is also projected to decrease federal health care spending by approximately $1 trillion by reducing Medicaid spending and enrollment and making changes to federal Medicare spending. The law also made changes to ACA marketplace enrollment that are projected to decrease the number of individuals with marketplace coverage. It is unclear if these changes will impact the pharmaceutical industry.

On the state level, local governments have been very aggressive in passing legislation and implementing regulations designed to control pharmaceutical product pricing, including price or patient reimbursement constraints, discounts, restrictions on certain

product access and marketing cost disclosure and transparency measures, and, in some cases, designed to encourage importation from other countries and bulk purchasing. Some states have passed laws that regulate how manufacturers make the 340B Drug Pricing Program ceiling price available on the market. Additionally, some individual states have begun establishing Prescription Drug Affordability Boards to review high-cost drugs and, in some cases, set upper payment limits. Legally mandated price controls on payment amounts by third-party payors or other restrictions could harm our business, results of operations, financial condition and prospects. In addition, regional healthcare authorities and individual hospitals are increasingly using bidding procedures to determine what pharmaceutical products and which suppliers will be included in their prescription drug and other healthcare programs. This could reduce the ultimate demand for our products or put pressure on our product pricing, which could negatively affect our business, results of operations, financial condition and prospects.

If we do not obtain protection under the Hatch-Waxman Amendments and similar foreign legislation for extending the term of patents covering each of our investigational product candidates, our business may be materially harmed.

In the United States, if all maintenance fees are paid on time, the natural expiration of a patent is generally 20 years from its earliest non-provisional filing date.

Various extensions may be available, but the life of a patent, and the protection it affords, is limited. Even if patents covering our investigational product candidates, their manufacture, or use are obtained, once the patent life has expired, we may be open to competition from competitive therapies. Given the amount of time required for the development, testing and regulatory review of new investigational therapies, patents protecting such candidates and concomitant therapies might expire before or shortly after such candidates and concomitant therapies are commercialized. As a result, our owned and licensed patent portfolio may not provide us with sufficient rights to exclude others from commercializing therapies similar or identical to ours.

Depending upon the timing, duration and conditions of FDA marketing approval of DT120, DT402 or any other product candidates, one or more of our U.S. patents may be eligible for limited patent term extension under the Hatch-Waxman Act, and similar legislation in the EU. The Hatch-Waxman Act permits a patent term extension of up to five years for a patent covering an approved product as compensation for effective patent term loss during product development and the FDA regulatory review process. The patent term extension cannot extend the remaining term of a patent beyond a total of 14 years from the date of product approval, only one patent may be extended and only those claims covering the approved drug, a method for using it, or a method of manufacturing it may be extended. However, we may not receive an extension because of, for example, failing to apply within applicable deadlines, failing to apply prior to expiration of relevant patents or otherwise failing to satisfy applicable requirements. Moreover, the length of the extension could be less than we request. If we are unable to obtain patent term extension or the term of any such extension is less than we request, the period during which we can enforce our patent rights for that product will not be lengthened and third parties, including our competitors, may obtain approval to market competing therapies sooner than we expect. As a result, our revenue from applicable product candidates could be materially reduced and our business, financial condition, results of operations, and prospects could be materially harmed.

We could experience difficulty enforcing our contracts.

Due to the nature of our business and the fact that our contracts involve certain substances whose usage is not legal under U.S. federal law and in certain other jurisdictions, we may face difficulties in enforcing our contracts in U.S. federal and state courts. The inability to enforce any of our contracts could have a material adverse effect on our business, prospects, financial condition and results of operations.

In order to manage our contracts with contractors, we ensure that such contractors are appropriately licensed at the state and federal level in the United States and at the appropriate level in other jurisdictions. Were such contractors to operate outside the terms of these licenses, we may experience an adverse effect on our business, including the pace of development of our product candidates.

Investors in certain jurisdictions may have difficulty in enforcing judgments and effecting the service of process on us.

The enforcement by investors of civil liabilities under the United States federal or state securities laws may be affected adversely by the fact that we are incorporated under the laws of the Province of British Columbia. It may not be possible for investors to enforce judgments obtained in the United States courts against us based upon the civil liability provisions of United States federal securities laws or the securities laws of any state of the United States.

There is some doubt as to whether a judgment of a United States court based solely upon the civil liability provisions of United States federal or state securities laws would be enforceable in Canada against us. There is also doubt as to whether an original action could be brought in Canada against us to enforce liabilities based solely upon United States federal or state securities laws.

In addition, all of our directors and officers reside outside of Canada. Some or all of the assets of such persons may be located outside of Canada. Therefore, it may not be possible for investors to collect or to enforce judgments obtained in Canadian courts predicated upon the civil liability provisions of applicable Canadian securities laws against such persons. Moreover, it may not be possible for investors to effect service of process within Canada upon such persons.

The increasing use of social media platforms presents new risks and challenges.

Social media is increasingly being used to communicate about our clinical development programs and the significant number of brain health disorders our products are being developed to treat, and we intend to utilize appropriate social media in connection with our commercialization efforts following approval of our product candidates. Social media practices in the biopharmaceutical industry continue to evolve and regulations relating to such use are not always clear. This evolution creates uncertainty and risk of noncompliance with regulations applicable to our business. For example, patients may use social media channels to comment on their experience in an ongoing blinded clinical trial or to report an alleged adverse event. When such disclosures occur, there is a risk that we fail to identify the comment and comply with applicable adverse event reporting obligations. Additionally, we may not be able to defend our business or the public’s legitimate interests in the face of the political and market pressures generated by social media due to FDA restrictions on advertising and promoting unapproved new drugs or other foreign governmental restrictions on what we may say about our product candidates (including prohibitions in the UK and EU on promoting unlicensed medicines and on promoting prescription only medicines to the general public). There is also a risk of inappropriate disclosure of sensitive information or negative or inaccurate posts or comments about us on any social networking website. If any of these events were to occur or we otherwise fail to comply with applicable regulations, we could incur liability, face regulatory actions or incur other harm to our business.

The production and sale of our product candidates may be considered illegal or may otherwise be restricted due to the use of controlled substances, which may also have consequences for the legality of investments from foreign jurisdictions.

Our product candidates contain controlled substances, including psychedelic substances, which are subject to strict legal requirements in certain jurisdictions where we will produce and sell our products. Certain jurisdictions may not allow the use or production of the substances included in our products, nor provide any possibilities for an exemption or regulatory approval that could allow for the lawful use or production of such substances. In addition, these jurisdictions may prohibit any form of contributing to the production or use of these drugs and may also directly or indirectly prohibit the receipt of any benefits following from the production and sale of these substances. Under circumstances, this may have consequences for the legality of the purchase of our shares or receipt of dividends in or from foreign jurisdictions.

If certain foreign authorities consider it illegal to invest in our company, this will negatively affect the possibility of commercializing and generating revenue in the country of interest. Any investigations of authorities against foreign investors could generate negative publicity. We cannot predict the likelihood of foreign authorities taking such a point of view or taking any actions against investors in certain jurisdictions.

If we fail to comply with environmental, health and safety laws and regulations, we could become subject to fines or penalties or incur costs that could have a material adverse effect on our business.

We are subject to numerous environmental, health and safety laws and regulations, including those governing laboratory procedures and the handling, use, storage, treatment and disposal of hazardous materials and wastes. Our operations involve the use of hazardous and flammable materials, including chemicals and biological materials. Our operations also produce hazardous waste products. We generally contract with third parties for the disposal of these materials and wastes. We cannot eliminate the risk of contamination or injury from these materials. In the event of contamination or injury resulting from our use of hazardous materials, we could be held liable for any resulting damages, and any liability could exceed our resources. We also could incur significant costs associated with civil or criminal fines and penalties.

Although we maintain workers’ compensation insurance to cover us for costs and expenses, we may incur due to injuries to our employees resulting from the use of hazardous materials, this insurance may not provide adequate coverage against potential liabilities. We do not maintain insurance for environmental liability or toxic tort claims that may be asserted against us in connection with our storage or disposal of hazardous and flammable materials, including chemicals and biological materials.

In addition, we may incur substantial costs in order to comply with current or future environmental, health and safety laws and regulations. These current or future laws and regulations may impair our research, development or commercialization efforts. Failure to comply with these laws and regulations also may result in substantial fines, penalties or other sanctions.

Our business activities may be subject to the FCPA, CFPOA and similar anti-bribery and anti-corruption laws of other countries in which we operate, as well as U.S., Canadian and certain foreign export controls, trade sanctions, and import laws and regulations. Compliance with these legal requirements could limit our ability to compete in foreign markets and subject us to liability if we violate them.

Our business activities may be subject to the FCPA, CFPOA and similar anti-bribery or anti-corruption laws, regulations or rules of other countries in which we operate. The FCPA and CFPOA generally prohibit companies and their employees and third-party intermediaries from offering, promising, giving or authorizing others to give anything of value, either directly or indirectly, to a government official in order to influence official action or otherwise obtain or retain business. The FCPA and CFPOA also require public companies to make and keep books and records that accurately and fairly reflect the transactions of the corporation and to devise and maintain an adequate system of internal accounting controls. Our business is heavily regulated and therefore involves significant interaction with public officials, including officials of non-U.S. and non-Canadian. governments. Additionally, in many other countries, hospitals are owned and operated by the government, and doctors and other hospital employees would be considered foreign officials under the FCPA. Recently, the SEC and DOJ have increased their FCPA enforcement activities with respect to biotechnology and pharmaceutical companies. There is no certainty that all of our employees, agents or contractors, or those of our affiliates, will comply with all applicable laws and regulations, particularly given the high level of complexity of these laws. Violations of these laws and regulations could result in fines, criminal sanctions against us, our officers or our employees, disgorgement, and other sanctions and remedial measures, and prohibitions on the conduct of our business. Any such violations could include prohibitions on our ability to offer our products in one or more countries and could materially damage our reputation, our brand, our international activities, our ability to attract and retain employees and our business, prospects, operating results and financial condition.

In addition, our products may be subject to U.S., Canadian and foreign export controls, trade sanctions and import laws and regulations. Governmental regulation of the import or export of our products, or our failure to obtain any required import or export authorization for our products, when applicable, could harm our international sales and adversely affect our revenue. Compliance with applicable regulatory requirements regarding the export of our products may create delays in the introduction of our products in international markets or, in some cases, prevent the export of our products to some countries altogether. Furthermore, U.S. and Canadian export control laws and economic sanctions prohibit the shipment of certain products and services to countries, governments, and persons targeted by U.S. and Canadian sanctions. If we fail to comply with export and import regulations and such economic sanctions, penalties could be imposed, including fines and/or denial of certain export privileges. Moreover, any new export or import restrictions, new legislation or shifting approaches in the enforcement or scope of existing regulations, or in the countries, persons, or products targeted by such regulations, could result in decreased use of our products by, or in our decreased ability to export our products to, existing or potential customers with international operations. Any decreased use of our product candidates or limitation on our ability to export or sell our product candidates would likely adversely affect our business.

Risks Related to Employee Matters, Managing our Growth and Other Risks Related to our Business

Our success is highly dependent on our ability to attract and retain highly skilled executive officers and employees.

To succeed, we must recruit, retain, manage and motivate qualified clinical, scientific, technical and management personnel, and we face significant competition for experienced personnel. We are highly dependent on the principal members of our management and scientific and medical staff. If we do not succeed in attracting and retaining qualified personnel, particularly at the management level, it could adversely affect our ability to execute our business plan and harm our operating results. In particular, the loss of one or more of our executive officers could be detrimental to us if we cannot recruit suitable replacements in a timely manner. We could in the future have difficulty attracting and retaining experienced personnel and may be required to expend significant financial resources in our employee recruitment and retention efforts.

Many of the other biotechnology companies that we compete against for qualified personnel have greater financial and other resources, different risk profiles and a longer history in the industry than we do. They also may provide higher compensation, more diverse opportunities and better prospects for career advancement. Some of these characteristics may be more appealing to high-quality candidates than what we have to offer. If we are unable to continue to attract and retain high-quality personnel, the rate and success at which we can discover, develop and commercialize our product candidates will be limited and the potential for successfully growing our business will be harmed.

Additionally, we rely on scientific and clinical advisors and consultants to assist us in formulating our research, development and clinical strategies. These advisors and consultants are not our employees and may have commitments to, or consulting or advisory contracts with, other entities that may limit their availability to us. In addition, these advisors and consultants typically will not enter into non-compete agreements with us. If a conflict of interest arises between their work for us and their work for another entity, we may lose their services. Furthermore, our advisors may have arrangements with other companies to assist those companies in developing products or technologies that may compete with ours. If we are unable to maintain consulting relationships with our scientific and clinical advisors or if they provide services to our competitors, our development and commercialization efforts will be impaired, and our business will be significantly harmed.

We face competition from other biotechnology and pharmaceutical companies and our financial condition and operations will suffer if we fail to effectively compete.

The biotechnology and pharmaceutical industries are intensely competitive and subject to rapid and significant technological change. Our competitors include large, well-established pharmaceutical companies, biotechnology companies, academic and research institutions developing products for the same indications we are targeting and competitors with existing marketed therapies.

Many other companies are developing or commercializing therapies to treat the same diseases or indications for which our product candidates may be useful. Many of our competitors have substantially greater financial, technical and human resources than we do, and have significantly greater experience than us in conducting preclinical testing and human clinical trials of product candidates, scaling up manufacturing operations and obtaining regulatory approvals of products. Accordingly, our competitors may succeed in obtaining regulatory approval for products more rapidly than we do. Our ability to compete successfully will largely depend on: (1) the efficacy and safety profile of our product candidates relative to marketed products and other product candidates in development; (2) our ability to develop and maintain a competitive position in the product categories and technologies on which it focuses; (3) the time it takes for our product candidates to complete clinical development and receive marketing approval; (4) our ability to obtain required regulatory approvals; (5) our ability to commercialize any of our product candidates that receive regulatory approval; (6) our ability to establish, maintain and protect intellectual property rights related to our product candidates; and (7) acceptance of any of our product candidates that receive regulatory approval by physicians and other HCPs and payers.

Competitors have developed and may develop technologies and compounds that could be the basis for products that challenge DT120 ODT, DT402 or other product candidates we are developing. Some of those products may have an entirely different approach or means of accomplishing the desired product effect than our product candidates and may be more effective or less costly than our product candidates. The success of our competitors and their product candidates relative to our product candidates could have a material adverse effect on the development programs for DT120 ODT, DT402 or other product candidates, as they may impact our ability to raise additional capital, on favorable terms or at all, and our ability to obtain necessary regulatory approvals.

If we are not able to compete effectively against our current and future competitors, our business will not grow, and our financial condition and operations will substantially suffer.

If we are unable to establish sales or marketing capabilities or enter into agreements with third parties to sell or market our product candidates, we may not be able to successfully sell or market our product candidates that obtain regulatory approval.

We currently have a small commercial team led by our Chief Commercial Officer. In order to commercialize any product candidates, if approved, we must build marketing, sales, distribution, managerial and other non-technical capabilities or make arrangements with third parties to perform these services for each of the territories in which we may have approval to sell or market our product candidates. We may not be successful in accomplishing these required tasks.

Establishing an internal sales or marketing team with technical expertise and supporting distribution capabilities to commercialize our product candidates will be expensive and time-consuming and will require significant attention of our executive officers to manage. Any failure or delay in the development of our internal sales, marketing and distribution capabilities could adversely impact the commercialization of any of our product candidates that we obtain approval to market, if we do not have arrangements in place with third parties to provide such services on our behalf. Alternatively, if we choose to collaborate, either globally or on a territory-by-territory basis, with third parties that have direct sales forces and established distribution systems, either to augment our own sales force and distribution systems or in lieu of our own sales force and distribution systems, we will be required to negotiate and enter into arrangements with such third parties relating to the proposed collaboration and such arrangements may prove to be less profitable than commercializing the product on our own. If we are unable to enter into such arrangements when needed, on acceptable terms, or at all, we may not be able to successfully commercialize any of our product candidates that receive regulatory approval, or any such commercialization may experience delays or limitations. If we are unable to successfully commercialize our approved product candidates, either on our own or through collaborations with one or more third

parties, our future product revenue will suffer, and we may incur significant additional losses.

In order to successfully implement our plans and strategies, we will need to increase the size of our organization, and we may experience difficulties in managing this growth.

As of December 31, 2025, we had 105 full-time employees. In order to successfully implement our development and commercialization plans and strategies, we expect to need additional managerial, operational, sales, marketing, financial and other personnel. Future growth would impose significant added responsibilities on members of management, including:

Our future financial performance and our ability to successfully develop and, if approved, commercialize DT120 ODT, DT402 or other product candidates will depend, in part, on our ability to effectively manage any future growth, and our management may also have to divert a disproportionate amount of its attention away from day-to-day activities in order to devote a substantial amount of time to managing these growth activities.

We currently rely, and for the foreseeable future will continue to rely, in substantial part on certain independent organizations, advisors and consultants to provide certain services, including key aspects of clinical development and manufacturing. We cannot assure you that the services of independent organizations, advisors and consultants will continue to be available to us on a timely basis when needed, or that we can find qualified replacements. In addition, if we are unable to effectively manage our outsourced activities or if the quality or accuracy of the services provided by third party service providers is compromised for any reason, our clinical trials may be extended, delayed or terminated, and we may not be able to obtain marketing approval of DT120 ODT, DT402 or any other product candidates or otherwise advance our business. We cannot assure you that we will be able to manage our existing third-party service providers or find other competent outside contractors and consultants on economically reasonable terms, or at all.

If we are not able to effectively expand our organization by hiring new employees and/or engaging additional third-party service providers, we may not be able to successfully implement the tasks necessary to further develop and commercialize DT120 ODT, DT402 or other product candidates and, accordingly, may not achieve our research, development and commercialization goals.

If our information technology systems or data, or those of third parties upon which we rely, are or were compromised, we could experience adverse consequences resulting from such compromise, including regulatory investigations or actions; litigation; fines and penalties; disruptions of our business operations; reputational harm; loss of revenue or profits; and other adverse consequences.

In the ordinary course of our business, we may collect, store, use, transmit, disclose, or otherwise process proprietary, confidential, and sensitive information, including personal information (such as health-related information), data related to clinical trials, intellectual property, and trade secrets. We may rely upon third-party service providers and technologies to operate critical business systems to process such information in a variety of contexts, including, without limitation, third-party providers of cloud-based infrastructure, encryption and authentication technology, employee email, and other functions. Our ability to monitor these third parties’ cybersecurity practices is limited, and these third parties may not have adequate information security measures in place. We may share or receive sensitive information with or from third parties. Our remote workforce poses increased risks to our information technology systems and data, as many of our employees work from home, utilizing network connections outside our premises.

Cyber-attacks, malicious internet-based activity, and online and offline fraud are prevalent. continue to increase, and are becoming increasingly difficult to detect. These threats come from a variety of sources, including =“hackers,” threat actors, personnel or third parties authorized to access our systems, sophisticated nation-states, and nation-state-supported actors. We and the third parties upon which we rely may be subject to a variety of evolving threats, including social-engineering attacks (including through phishing attacks), malicious code (such as viruses and worms), malware (including as a result of advanced persistent threat intrusions), denial-of-service attacks (such as credential stuffing), personnel or authorized third-party misconduct or error, ransomware attacks, supply-chain attacks, software bugs, server malfunctions, software or hardware failures, loss of information or

other information technology assets, adware, telecommunications failures, earthquakes, fires, floods, and other similar threats. Extortion payments may alleviate the negative impact of a ransomware attack, but we may be unwilling or unable to make such payments due to, for example, applicable laws or regulations prohibiting such payments. Similarly, supply-chain attacks have increased in frequency and severity, and we cannot guarantee that third parties and infrastructure in our supply chain or our third-party partners’ supply chains have not been compromised or that they do not contain exploitable defects or bugs that could result in a cybersecurity incident or disruption to our information technology systems or the third-party information technology systems that support us and our services. Further, adoption of artificial intelligence (“AI”) tools by us or by third parties may pose new cybersecurity challenges. Threat actors may use AI tools to automate and enhance cybersecurity attacks against us. We use software and platforms designed to detect such cybersecurity threats, including AI-based tools, but these threats could become more sophisticated and harder to detect and counteract, which may pose significant risks to our data security and systems. Future or past business transactions (such as acquisitions or integrations) could expose us to additional cybersecurity risks and vulnerabilities, as our systems could be negatively affected by vulnerabilities present in acquired or integrated entities’ systems and technologies. During times of war and other major conflicts, we and the third parties upon which we rely may be vulnerable to a heightened risk of these attacks, including retaliatory cyber-attacks, that could materially disrupt our systems and operations, supply chain, and ability to produce, sell and distribute our products.

Any of the previously identified or similar threats could cause a cybersecurity incident or other interruption. A cybersecurity incident or other interruption could result in unauthorized, unlawful, or accidental acquisition, modification, destruction, loss, alteration, encryption, disclosure of, or access to sensitive information. A cybersecurity incident or other interruption could disrupt our ability (and that of third parties upon whom we rely) to provide our services.

We may expend significant resources or modify our business activities (including our clinical trial activities) in an effort to protect against cybersecurity incidents. Certain data privacy and security obligations may require us to implement and maintain specific security measures, industry-standard or reasonable security measures to protect our information technology systems and data. Despite the implementation of security measures in an effort to protect systems that store our information, given their size and complexity and the increasing amounts of information maintained on our internal information technology systems, and those of third parties upon which we rely (including sites performing our clinical trials), there can be no assurance that these measures will be effective or that a court or regulatory authority will consider them to be appropriate or reasonable. We may be unable in the future to detect vulnerabilities in our information technology systems because such threats and techniques change frequently, are often sophisticated in nature, and may not be detected until after a cybersecurity incident has occurred. Despite our efforts to identify and remediate vulnerabilities, if any, in our information technology systems, our efforts may not be successful. Further, we may experience delays in developing and deploying remedial measures designed to address any such identified potential vulnerabilities, and proactive or reactive measures to identify or remediate cybersecurity incidents may be significantly costly. Additionally, our contracts may not contain limitations of liability, and even where they do, there can be no assurance that limitations of liability in our contracts are sufficient to protect us from liabilities, damages, or claims related to our data privacy and security obligations. We cannot be sure that our insurance coverage will be adequate or sufficient to protect us from or to mitigate liabilities arising out of our privacy and security practices, that such coverage will continue to be available on commercially reasonable terms or at all, or that such coverage will pay future claims.

Applicable data privacy and security obligations may require us to notify relevant stakeholders of cybersecurity incidents. Such disclosures are costly, and the disclosures or the failure to comply with such requirements could lead to adverse consequences. If we (or a third party upon whom we rely) experience a cybersecurity incident or are perceived to have experienced a cybersecurity incident, we may experience adverse consequences. These consequences may include: government scrutiny or enforcement actions (for example, investigations, fines, penalties, audits, and inspections); additional reporting requirements and/or oversight; restrictions on processing information (including personal information); litigation (including class claims); indemnification obligations; negative publicity; reputational harm; monetary fund diversions; interruptions in our operations (including availability of information); financial loss; inability to report or delay in reporting our financial results; significant remediation expenses; and other similar harms. Cybersecurity incidents and attendant consequences may cause customers to stop using our services, deter new clinical trial participants from participating in our services, and negatively impact our ability to grow and operate our business.

Risks Related to our Intellectual Property

Third-party claims or litigation alleging infringement of patents or other proprietary rights, or seeking to invalidate our patents or other proprietary rights, may delay or prevent our development and commercialization efforts.

Our commercial success depends in part on avoiding infringement of the patents and proprietary rights of third parties. There is a substantial amount of litigation, both within and outside the United States, involving patent and other intellectual property rights in the pharmaceutical industry, including patent infringement lawsuits, interferences, reexamination, derivation and administrative

law proceedings, inter partes review and post-grant review before the USPTO, as well as oppositions and similar processes in foreign jurisdictions. Numerous U.S. and foreign issued patents and pending patent applications, which are owned by third parties, exist in the fields in which we are developing product candidates. As the biopharmaceutical industry expands and more patents are issued, the risk increases that our product candidates or other business activities may be subject to claims of infringement of the patent rights of third parties. Third parties may assert that we are employing their proprietary technology without authorization.

There may be third-party patents or patent applications with claims to compositions, formulations, methods of manufacture or methods for treatment related to the use or manufacture of our product candidates. Moreover, because patent applications can take many years to issue, there may be currently pending patent applications that may later result in issued patents covering our product candidates. The existence of any patent with valid and enforceable claims covering one or more of our product candidates could cause substantial delays in our ability to introduce a candidate into the U.S. market if the term of such patent extends beyond our desired product launch date.

There may also be patent applications that have been filed but not published and if such applications issue as patents, they could be asserted against us. For example, in most cases, a patent filed today would not become known to industry participants for at least 18 months given patent rules applicable in most jurisdictions that do not require publication of patent applications until 18 months after filing.

In addition, third parties may obtain patent rights in the future and claim that use of our technologies infringes upon these rights. If any third-party patents were held by a court of competent jurisdiction to cover the manufacturing process of any of our product candidates, any molecules formed during the manufacturing process or any final product itself, the holders of any such patents may be able to block our ability to commercialize such product candidate unless we obtained a license under the applicable patents, or until such patents expire. Similarly, if any third-party patent were held by a court of competent jurisdiction to cover aspects of our formulations, processes for manufacture or methods of use, the holders of any such patent may be able to block our ability to develop and commercialize the applicable product candidate unless we obtained a license or until such patent expires. In either case, such a license may not be available on commercially reasonable terms.

Furthermore, pending patent applications that have been published can, subject to certain limitations, be later amended in a manner that could cover our technologies, product candidate(s), or the use of our product candidate(s). As such, there may be applications of others now pending or recently revived patents of which we are unaware. These patent applications may later result in issued patents, or the revival of previously abandoned patents, that may be infringed by the manufacture, use, or sale of our technologies or product candidate(s) or will prevent, limit, or otherwise interfere with our ability to make, use, or sell our technologies and product candidate(s).

Parties making claims against us may obtain injunctive or other equitable relief, which could effectively block our ability to further develop and commercialize one or more of our product candidates. Defense of these claims, regardless of their merit, would involve substantial litigation expense and would be a substantial diversion of employee resources from our business. In the event of a successful infringement or other intellectual property claim against us, we may have to pay substantial damages, including treble damages and attorneys’ fees for willful infringement, obtain one or more licenses from third parties, pay royalties or redesign our affected products, which may be impossible or require substantial time and monetary expenditure. We cannot predict whether any such license would be available at all or whether it would be available on commercially reasonable terms.

In addition to infringement claims against us, we may become a party to other patent litigation and other proceedings, including interference, derivation or post-grant proceedings declared or granted by the USPTO and similar proceedings in foreign countries, regarding intellectual property rights with respect to our products. An unfavorable outcome in any such proceedings could require us to cease using the related technology or to attempt to license rights to it from the prevailing party or could cause us to lose valuable intellectual property rights. Our business could be harmed if the prevailing party does not offer us a license on commercially reasonable terms, if any license is offered at all. Litigation or other proceedings may fail and, even if successful, may result in substantial costs and distract our management and other employees. We may also become involved in disputes with others regarding the ownership of intellectual property rights.

Third parties may submit applications for patent term extensions in the United States or other jurisdictions where similar extensions are available and/or Supplementary Protection Certificates in the EU states seeking to extend certain patent protection that, if approved, may interfere with or delay the launch of one or more of our product candidates.

The cost to us of any patent litigation or other proceeding, even if resolved in our favor, could be substantial. Patent litigation and other proceedings may fail, and even if successful, may result in substantial costs and distract our management and other

employees. Uncertainties resulting from the initiation and continuation of patent litigation or other proceedings could impair our ability to compete in the marketplace.

Furthermore, as the patent landscape is crowded and highly competitive, even in the absence of litigation we may need to obtain licenses from third parties to advance our research or allow commercialization of our product candidates. We may fail to obtain any of these licenses at a reasonable cost or on reasonable terms, if at all. Even if we are able to obtain a license, it may be non-exclusive, which means that our competitors may also receive access to the same technologies licensed to us. In that event, we may face commercial competition, which could harm our business. We cannot provide any assurances that third-party patents do not exist which might be enforced against product candidates resulting in either an injunction prohibiting our sales, or, with respect to our sales, an obligation on our part to pay royalties or other forms of compensation to third parties.

We may not identify relevant patents or may incorrectly interpret the relevance, scope or expiration of a patent, which might adversely affect our ability to develop and market our products.

We cannot guarantee that patent searches, including the identification of relevant patents, the scope of patent claims or the expiration of relevant patents, are complete and thorough, nor can we be certain that we have identified each and every patent and pending application in the United States and abroad that is relevant to or necessary for the commercialization of our product candidates in any jurisdiction.

The scope of a patent claim is determined by an interpretation of the law, the written disclosure in a patent and the patent’s prosecution history. Our interpretation of the relevance or the scope of a patent or a pending application may be incorrect, which may negatively impact our ability to market our products or pipeline candidates. We may incorrectly determine that our products are not covered by a third-party patent. Further, we may conclude that a well-informed court or other tribunal would find the claims of a relevant third-party patent to be invalid based on prior art, enablement, written description, or other ground, and that conclusion may be incorrect, which may negatively impact our ability to market our products or pipeline molecules.

Many patents may cover a marketed product, including the composition of the product, methods of use, formulations, cell line constructs, vectors, growth media, production processes and purification processes. The identification of all patents and their expiration dates relevant to the production and sale of a reference product is extraordinarily complex and requires sophisticated legal knowledge in the relevant jurisdiction. It may be impossible to identify all patents in all jurisdictions relevant to a marketed product. We may not identify all relevant patents, or incorrectly determine their expiration dates, which may negatively impact our ability to develop and market our products.

Failure to identify and correctly interpret relevant patents may negatively impact our ability to develop, market and commercialize our products.

We may become involved in lawsuits to protect or enforce our patents, the patents of our licensors or our other intellectual property rights, which could be expensive, time-consuming and unsuccessful.

Competitors may infringe or otherwise violate our patents, the patents of our licensors or our other intellectual property rights. To counter infringement or unauthorized use, we may be required to file legal claims, which can be expensive and time-consuming. In addition, in an infringement proceeding, a court may decide that a patent of ours or our licensors is not valid or is unenforceable, or may refuse to stop the other party from using the technology at issue on the grounds that our patents do not cover the technology in question. An adverse result in any litigation or defense proceedings could put one or more of our patents at risk of being invalidated or interpreted narrowly and could put our patent applications at risk of not issuing. The initiation of a claim against a third party may also cause the third party to bring counter claims against us such as claims asserting that our patents are invalid and/or unenforceable. In patent litigation in the United States, defendant counterclaims alleging invalidity and/or unenforceability are commonplace. Grounds for a validity challenge could be an alleged failure to meet any of several statutory requirements, including lack of novelty, obviousness, non-enablement, written description, or lack of patentable subject matter. Grounds for an unenforceability assertion could be an allegation that someone connected with the prosecution of the patent withheld relevant material information from the USPTO or made a materially misleading statement during prosecution. Third parties may also raise similar validity claims before the USPTO in post-grant proceedings such as ex parte reexaminations, inter partes review or post-grant review, or oppositions or similar proceedings outside the United States, in parallel with litigation or even outside the context of litigation. Because of a lower evidentiary standard in these USPTO post-grant proceedings compared to the evidentiary standard in United States federal courts necessary to invalidate a patent claim, a third party could potentially provide evidence in a USPTO proceeding sufficient for the USPTO to hold a claim invalid even though the same evidence would be insufficient to invalidate the claim if first presented in a district court action. The outcome following legal assertions of invalidity and unenforceability is unpredictable, and there is a risk that a court will decide that a patent of ours is invalid or unenforceable, in whole or in part, and that we do not have the right to stop the other party from using the invention at issue. There is also a risk that, even if the validity of such patents is upheld, the court will construe the patent’s claims narrowly and decide that we do not have the right to stop the other party from using the invention at issue on the grounds that our patent claims do not cover the invention or that the other party's use of our patented technology falls under the safe harbor to patent infringement under 35 U.S.C. § 271(e)(1). An adverse outcome in a litigation or proceeding involving our patents could limit our ability to assert our patents against those parties or other competitors and may curtail or preclude our ability to exclude third parties from making and selling similar or competitive products. Any of these occurrences could adversely affect our competitive business position, business prospects and financial condition. Even if we establish infringement, the court may decide not to grant an injunction against further infringing activity and instead award only monetary damages, which may or may not be an adequate remedy.

We cannot be certain that there is no invalidating prior art, of which we and the patent examiner were unaware during prosecution. For the patents and patent applications that we have licensed, we may have limited or no right to participate in the defense of any licensed patents against challenge by a third party. If a defendant were to prevail on a legal assertion of invalidity or unenforceability, we would lose at least part, and perhaps all, of any future patent protection on our current or future product candidates. Such a loss of patent protection could harm our business.

We may not be able to prevent, alone or with our licensors, misappropriation of our intellectual property rights, particularly in countries where the laws may not protect those rights as fully as in the United States. Our business could be harmed if in litigation the prevailing party does not offer us a license on commercially reasonable terms. Any litigation or other proceedings to enforce our intellectual property rights may fail, and even if successful, may result in substantial costs and distract our management and other employees.

Similarly, if we assert trademark infringement claims, a court may determine that the marks we have asserted are invalid or unenforceable, or that the party against whom we have asserted trademark infringement has superior rights to the marks in question. In this case, we could ultimately be forced to cease use of such trademarks.

Furthermore, because of the substantial amount of discovery required in connection with intellectual property litigation, there is a risk that some of our confidential information could be compromised by disclosure during this type of litigation. There could also be public announcements of the results of hearings, motions or other interim proceedings or developments. If securities analysts or investors perceive these results to be negative, it could have an adverse effect on the market price of common shares. Moreover, there can be no assurance that we will have sufficient financial or other resources to file and pursue such infringement claims, which typically last for years before they are concluded. Even if we ultimately prevail in such claims, the monetary cost of such litigation and the diversion of the attention of our management and scientific personnel could outweigh any benefit we receive as a result of the proceedings.

We may be subject to claims that our employees, consultants or independent contractors have wrongfully used or disclosed confidential information of third parties or that our employees have wrongfully used or disclosed alleged trade secrets of their former employers.

We employ individuals and retain independent contractors and consultants who were previously employed at universities or other pharmaceutical companies, including our competitors or potential competitors. Although we seek to protect our ownership of intellectual property rights by ensuring that our agreements with our employees, independent contractors, consultants, collaborators and other third parties with whom we do business include provisions requiring such parties to assign rights in inventions to us, we may be subject to claims that we or our employees, consultants or independent contractors have inadvertently or otherwise used or disclosed confidential information of such persons’ former companies or other third parties. We may also be subject to claims that such persons or other third parties have an ownership interest in our intellectual property. Litigation may be necessary to defend against these claims. There is no guarantee of success in defending these claims, and if we fail in defending any such claims, in addition to paying monetary damages, we may lose valuable intellectual property rights, such as exclusive ownership of, or right to use, valuable intellectual property. Even if we are successful in defending against such claims, litigation could result in substantial costs and be a distraction to management and other employees.

In addition, while we require our employees, consultants and contractors who may be involved in the development of intellectual property to execute agreements assigning such intellectual property to us, we may be unsuccessful in executing such an agreement with each party who in fact develops intellectual property that we regard as our own, which may result in claims by or against us asserting ownership of such intellectual property. If we fail in prosecuting or defending any such claims, in addition to paying monetary damages, we may lose valuable intellectual property rights. Even if we are successful in prosecuting or defending against such claims, litigation could result in substantial costs and be a distraction to our senior management and scientific personnel.

If we are unable to obtain and maintain effective patent protection for our technology and product candidates, or if the scope of the patent protection obtained is not sufficiently broad, we may not be able to compete effectively in our markets

We rely upon a combination of patents, trade secret protection, trademarks, and confidentiality agreements to protect the intellectual property related to our product candidates and development programs. Our success depends in large part on our ability to obtain and maintain patents and other intellectual property protection in the United States and in other countries with respect to various proprietary elements of our product candidates, such as, for example, our product formulations and processes for manufacturing our products and our ability to maintain and control the confidentiality of our trade secrets and confidential information critical to our business.

We have sought to protect our proprietary position by filing patent applications in the United States and abroad related to our products that are important to our business. The patent prosecution process is expensive and time-consuming, and we may not be able to file and prosecute all necessary or desirable patent applications at a reasonable cost or in a timely manner. It is also possible that we will fail to identify patentable aspects of our research and development output before it is too late to obtain patent protection. There is no guarantee that any patent application we file will result in an issued patent having claims that protect our products; and, as a result, we may not be able to effectively prevent others from commercializing competitive products. Additionally, while the basic requirements for patentability are similar across jurisdictions, each jurisdiction has its own specific requirements for patentability. We cannot guarantee that we will obtain identical or similar patent protection covering our products in all jurisdictions where we file patent applications. If the patent applications we hold or have in-licensed with respect to our development programs and product candidates fail to issue, if their breadth or strength of protection is threatened, or if they fail to provide meaningful exclusivity for any product candidate, it could dissuade companies from collaborating with us to develop product candidates and threaten our ability to commercialize any product candidates that are approved. Any such outcome could have a materially adverse effect on our business.

The patents and patent applications that we own or in-license may fail to result in issued patents with claims that protect our present and future product candidates in the United States or in other foreign countries. There is no assurance that all of the

potentially relevant prior art relating to our patents and patent applications has been found, which can prevent a patent from issuing from a pending patent application, or be used to invalidate a patent. Even if patents do successfully issue and even if such patents cover our present or future product candidates, third parties may challenge their validity, enforceability or scope, which may result in such patents being narrowed, invalidated or held unenforceable. Any successful opposition to these patents or any other patents owned by or licensed to us could deprive us of rights necessary for the successful commercialization of any present or future product candidates or methods of using such. Further, if we encounter delays in regulatory approvals, the period of time during which we could market a product candidate under patent protection could be reduced.

The patent position of biopharmaceutical companies are generally uncertain and involve complex legal and factual questions and has been and will continue to be the subject of litigation and new legislation. In addition, the laws of foreign countries may not protect our rights to the same extent as the laws of the United States. For example, many countries restrict the patentability of methods of treatment of the human body. Publications of discoveries in scientific literature often lag behind the actual discoveries, and patent applications in the United States and other jurisdictions are typically not published until 18 months after filing, or in some cases not at all. Therefore, we cannot know with certainty whether we were the first to make the inventions claimed in our owned or licensed patents or pending patent applications, or that we were the first to file for patent protection of such inventions. As a result of these and other factors, the issuance, scope, validity, enforceability and commercial value of our patent rights are uncertain. The pending patent applications that we own or license may fail to result in issued patents with claims that cover our product candidates in the United States or in other countries for many reasons. Our pending and future patent applications may not result in patents being issued which protect our technology or products, in whole or in part, or which effectively prevent others from commercializing competitive technologies and products. Changes in either the patent laws or interpretation of the patent laws in the United States and other countries may diminish the value of our patents or narrow the scope of our patent protection. There is no assurance that all potentially relevant prior art relating to our patents and patent applications has been found, considered or cited during patent prosecution, which can be used to invalidate a patent or prevent a patent from issuing from a pending patent application.

Moreover, we have in the past, and may in the future, be subject to a third-party pre-issuance submission of prior art to the U.S. Patent and Trademark Office (“USPTO”). We may also become involved in opposition, derivation, reexamination, inter partes review, post-grant review or interference proceedings challenging our patent rights or the patent rights of others. For example, patents granted by the European Patent Office may be opposed by any person within nine months from the publication of their grant and, in addition, may be challenged before national courts at any time. The costs of defending our patents or enforcing our proprietary rights in post-issuance administrative proceedings and litigation can be substantial and the outcome can be uncertain. An adverse determination in any such submission, proceeding or litigation could reduce the scope of, or invalidate, our patent rights, allow third parties to commercialize our technology or products and compete directly with us, without payment to us, or result in our inability to manufacture or commercialize products without infringing third-party patent rights. In addition, if the breadth or strength of protection provided by our patents and patent applications is threatened, it could dissuade companies from collaborating with us to license, develop or commercialize current or future product candidates.

Furthermore, even if they are unchallenged, our patents and patent applications may not adequately protect our intellectual property, provide exclusivity for our product candidates or prevent others from designing around our claims. Any of these outcomes could impair our ability to prevent competitors from using the technologies claimed in any patents issued to us, which may have an adverse impact on our business. If the breadth or strength of protection provided by the patents and patent applications we hold, license or pursue with respect to our product candidates is threatened, it could threaten our ability to prevent third parties from using the same technologies that we use in our product candidates.

The issuance of a patent is not conclusive as to its inventorship, scope, validity or enforceability, and our owned and licensed patents may be challenged in the courts or patent offices in the United States and abroad. Such challenges may result in loss of exclusivity or freedom to operate or in patent claims being narrowed, invalidated or held unenforceable, in whole or in part, which could limit our ability to stop others from using or commercializing similar or identical technology and products, or limit the duration of the patent protection of our technology and products. Generally, issued patents are granted a term of 20 years from the earliest claimed non-provisional filing date. In certain instances, patent term can be adjusted to recapture a portion of delay by the USPTO in examining the patent application (patent term adjustment) or extended to account for term effectively lost as a result of the FDA regulatory review period (patent term extension), or both. The scope of patent protection may also be limited. Without patent protection for our current or future product candidates, we may be open to competition from generic versions of such products. Given the amount of time required for the development, testing and regulatory review of new product candidates, patents protecting such candidates might expire before or shortly after such candidates are commercialized. As a result, our owned and licensed patent portfolio may not provide us with sufficient rights to exclude others from commercializing products similar or identical to ours.

Method of use patents protect the use of a product for the specified method or indication. In the absence of separate composition of matter protection, this type of patent does not prevent a competitor from making and marketing a product that is identical to our

product candidate(s) for an indication that is outside of the methods of use claimed in our patents. Moreover, even if competitor products are not approved for use in our patented indications, and our competitors do not actively promote their products for indications that are covered by our patents, clinicians may prescribe these competitor products “off-label.” Although off-label prescriptions may infringe or contribute to the infringement of method of use patents, such infringement is difficult to prevent or prosecute.

Obtaining and maintaining our patent protection depends on compliance with various procedural requirements, document submissions, fee payment and other requirements imposed by governmental patent agencies. Our patent protection could be reduced or eliminated for non-compliance with these requirements.

Periodic maintenance fees on any issued patent are due to be paid to the USPTO and other foreign patent agencies in several stages over the lifetime of the patent. We rely on our outside counsel or third-party vendors to pay these fees. The USPTO, CIPO and various foreign national or international patent agencies require compliance with a number of procedural, documentary, fee payment and other similar provisions during the patent application process. While, in many cases, an inadvertent lapse can be cured by payment of a late fee or by other means in accordance with the applicable rules, there are situations in which noncompliance can result in abandonment or lapse of the patent or patent application, resulting in partial or complete loss of patent rights in the relevant jurisdiction. Noncompliance events that could result in abandonment or lapse of patent rights include, but are not limited to, failure to timely file national and regional stage patent applications based on our international patent application, failure to respond to official actions within prescribed time limits, non-payment of fees and failure to properly legalize and submit formal documents. If we or our licensors fail to maintain the patents and patent applications covering our present and future product candidates, our competitors might be able to enter the market, which would have an adverse effect on our business.

We may not be able to protect our intellectual property rights throughout the world, which could impair our business.

Filing, prosecuting, defending and enforcing patents and trademarks on product candidates in all countries throughout the world would be prohibitively expensive, and our intellectual property rights in some countries outside the United States can be less extensive than those in the United States. In addition, the laws of some foreign countries do not protect intellectual property rights to the same extent as federal and state laws in the United States. Further, licensing partners may choose not to file patent or trademark applications in certain jurisdictions in which we may obtain commercial rights, thereby precluding the possibility of later obtaining patent protection in these countries. Consequently, we may not be able to prevent third parties from practicing our inventions in all countries outside the United States or importing products made using our inventions into the United States or other jurisdictions and we may not be able to use our trademarks in all countries or prevent others from using or registering similar trademarks. Competitors may use our technologies in jurisdictions where we have not obtained patent protection to develop their own products and may also export infringing products to territories where we have patent protection, but the ability to enforce our patents is not as strong as that in the United States. These products may compete with our products and our patents or other intellectual property rights may not be effective or sufficient to prevent them from competing.

Many companies have encountered significant problems in protecting and defending intellectual property rights in foreign jurisdictions. The legal systems of certain countries, particularly certain developing countries, do not favor the enforcement of patents, trade secrets and other intellectual property protection, which could make it difficult for us to stop the infringement of our patents or marketing of competing products in violation of our proprietary rights generally. Proceedings to enforce our patent rights in foreign jurisdictions, whether or not successful, could result in substantial costs and divert our efforts and attention from other aspects of our business, could put our patents at risk of being invalidated or interpreted narrowly and our patent applications at risk of not being approved, and could provoke third parties to assert claims against us. We may not prevail in any lawsuits that we initiate and the damages or other remedies awarded, if any, may not be commercially meaningful. Governments of some foreign countries may force us to license our patents to third parties on terms that are not commercially reasonable or acceptable to us. In addition, many countries limit the enforceability of patents against government agencies or government contractors. Accordingly, our efforts to enforce our intellectual property rights around the world may be inadequate to obtain a significant commercial advantage from the intellectual property that we develop or license.

Further, the standards applied by the USPTO and foreign patent offices in granting patents are not always applied uniformly or predictably. As such, we do not know the degree of future protection that we will have on our technologies and product candidate(s). While we will endeavor to try to protect our technologies and product candidate(s) with intellectual property rights such as patents, as appropriate, the process of obtaining patents is time-consuming, expensive, and unpredictable.

In addition, geopolitical actions in the United States and in other countries could increase the uncertainties and costs surrounding the prosecution or maintenance of our patent applications or those of any future licensors and the maintenance, enforcement, or

defense of our issued patents or those of any future licensors. As a result, our competitive position may be impaired, and our business, financial condition, results of operations, and prospects may be adversely affected.

Changes in U.S. patent law or the patent law of other countries or jurisdictions could diminish the value of patents in general, thereby impairing our ability to protect our product candidates.

The United States has enacted and implemented wide-ranging patent reform legislation. The U.S. Supreme Court has ruled on several patent cases in recent years, either narrowing the scope of patent protection available in certain circumstances or weakening the rights of patent owners in certain situations. In addition to increasing uncertainty with regard to our ability to obtain patents in the future, this combination of events has created uncertainty with respect to the value of patents, once obtained. Depending on actions by the U.S. Congress, the federal courts and the USPTO, the laws and regulations governing patents could change in unpredictable ways that would weaken our ability to obtain new patents or to enforce patents that we have licensed or that we might obtain in the future. For example, recent decisions raise questions regarding the award of patent term adjustment (PTA) for patents in families where related patents have issued without PTA. Thus, it cannot be said with certainty how PTA will/will not be viewed in future and whether patent expiration dates may be impacted.

Similarly, changes in patent law and regulations in other countries or jurisdictions or changes in the governmental bodies that enforce them or changes in how the relevant governmental authority enforces patent laws or regulations may weaken our ability to obtain new patents or to enforce patents that we have licensed or that we may obtain in the future. For example, the complexity and uncertainty of European patent laws have also increased in recent years. In Europe, a new unitary patent system took effect on June 1, 2023, which will significantly impact European patents, including those granted before the introduction of such a system. Under the unitary patent system, all European patents, including those issued prior to June 1, 2023, now by default automatically fall under the jurisdiction of a new European Unified Patent Court (the UPC) for litigation involving such patents. As the UPC is a relatively new court system, there is uncertainty regarding litigation at the UPC. Our European patent applications, if issued, could be challenged in the UPC. During the first seven years of the UPC’s existence, the UPC legislation allows a patent owner to opt its European patents out of the jurisdiction of the UPC. We may decide to opt out our future European patents from the UPC, but doing so may preclude us from realizing the benefits of the UPC. Moreover, if we do not meet all of the formalities and requirements for opt-out under the UPC, our future European patents could remain under the jurisdiction of the UPC. The UPC will provide our competitors with a new forum to centrally revoke our European patents and allow for the possibility of a competitor to obtain a pan-European injunction. It is uncertain how the UPC will impact granted European patents in the pharmaceutical industry.

Additionally, recent reforms and changes at government agencies of the United States and those of non-U.S. jurisdictions could increase the uncertainties and costs surrounding the prosecution or maintenance of our patent applications, and the maintenance, enforcement, or defense of our issued patents. For example, the ability of the USPTO and other applicable patent authorities to properly administer their functions is highly dependent on the levels of funding available to the agency and their ability to retain key personnel and fill key leadership appointments, among various factors. Termination of employees or delays in replacing or hiring for key positions could significantly impact the ability of the USPTO and other applicable patent authorities to fulfill their functions and could greatly impact our ability to timely and adequately prosecute or maintain our patent applications, and our ability to timely and adequately maintain, enforce, or defend our issued patents.

Our reliance on third parties requires us to share our trade secrets, which increases the possibility that a competitor will discover them or that our trade secrets will be misappropriated or disclosed.

While we have filed patent applications to protect certain aspects of our own proprietary formulation and process developments, we also rely on trade secret protection and confidentiality agreements to protect proprietary scientific, business and technical information and know-how that is not or may not be patentable or that we elect not to patent. However, confidential information and trade secrets can be difficult to protect. We may need to share our trade secrets and proprietary know-how with current or future partners, collaborators, contractors, and others located in countries at heightened risk of theft of trade secrets, including through direct intrusion by private parties or foreign actors, and those affiliated with or controlled by state actors. Moreover, the information embodied in our trade secrets and confidential information may be independently and legitimately developed or discovered by third parties without any improper use of or reference to information or trade secrets. We seek to protect the scientific, technical and business information supporting our operations, as well as the confidential information relating specifically to our product candidates by entering into confidentiality agreements with parties to whom we need to disclose our confidential information, such as, our employees, consultants, board members, contractors, potential collaborators and financial investors. However, we cannot be certain that such agreements have been entered into with all relevant parties. We also seek to preserve the integrity and confidentiality of our data and trade secrets by maintaining physical security of our premises and physical and electronic security of our information technology systems, but it is possible that these security measures could be breached. While we have confidence in these individuals, organizations and systems, agreements or security measures may be breached and we may not have adequate remedies for any

breach. Our confidential information and trade secrets thus may become known by our competitors in ways we cannot prove or remedy.

Although we require all of our employees and consultants to assign their inventions to us, and all of our employees, consultants, advisors and any third parties who have access to our proprietary know-how, information or technology to enter into confidentiality agreements, we cannot provide any assurances that all such agreements have been duly executed. We cannot guarantee that our trade secrets and other confidential proprietary information will not be disclosed or that competitors will not otherwise gain access to our trade secrets or independently develop substantially equivalent information and techniques. For example, any of these parties may breach the agreements and disclose our proprietary information, including our trade secrets, and we may not be able to obtain adequate remedies for such breaches.

Misappropriation or unauthorized disclosure of our trade secrets could impair our competitive position and may harm our business. Additionally, if the steps taken to maintain our trade secrets are deemed inadequate, we may have insufficient recourse against third parties for misappropriating any trade secret. We cannot guarantee that our employees, former employees or consultants will not file patent applications claiming our inventions. Because of the “first-to-file” laws in the United States, such unauthorized patent application filings may defeat our attempts to obtain patents on our own inventions.

We may be subject to claims challenging the inventorship of our patent filings and other intellectual property.

We may in the future be subject to claims that former employees, collaborators or other third parties have an interest in our patent applications or patents we may be granted or other intellectual property as an inventor or co-inventor. For example, we may have inventorship or ownership disputes arise from conflicting obligations of consultants or others who are involved in developing our product candidates. Litigation may be necessary to defend against these and other claims challenging inventorship or ownership. If we fail in defending any such claims, in addition to paying monetary damages, we may lose valuable intellectual property rights, such as exclusive ownership of or right to use valuable intellectual property. Such an outcome could harm our business. Even if we are successful in defending against such claims, litigation could result in substantial costs and be a distraction to management and other employees.

If we fail to comply with our obligations in the agreements under which we license intellectual property and other rights from third parties or otherwise experience disruptions to our business relationships with our licensors, we could lose license rights that are important to our business.

We are party to a license agreement with Catalent, pursuant to which we were granted an exclusive license to use their Zydis technology in the development of DT120. If we fail to comply with our obligations under these agreements or if we are subject to a bankruptcy, we may be required to make certain payments to the licensor of our license or the licensor may have the right to terminate the license, in which event we would not be able to develop or market products covered by the license. In the event we breach any of our obligations under these agreements, we may incur significant liability to our research and licensing partners. Disputes may arise regarding intellectual property subject to a research licensing agreement, including:

If disputes over intellectual property and other rights that we have licensed prevent or impair our ability to maintain our current licensing arrangements on acceptable terms, we may be unable to successfully develop and commercialize the affected product candidates and that could harm our business.

In addition, our license agreement with Catalent imposes, and we expect that future license agreements will impose, various diligence, milestone payment, royalty, insurance and other obligations on us. If we breach any material obligations, or use the intellectual property licensed to us in an unauthorized manner, we may be required to pay damages and the licensor(s) may have the right to terminate the license, which could result in us being unable to develop, manufacture and sell products that are covered by the licensed technology or enable a competitor to gain access to the licensed technology, and could compromise our development and commercialization efforts for our product candidates.

We may develop or license intellectual property for which development was funded or otherwise assisted by, the U.S. government and/or government agencies, such as the National Institutes of Health, for development of our technology and product candidates. Failure to meet our own obligations to future licensors or upstream licensors, including such government agencies, may result in the loss of our rights to such intellectual property, which could harm our business.

The U.S. government and/or government agencies may provide funding, facilities, personnel, or other assistance in connection with the development of the intellectual property rights owned by or licensed to us. The U.S. government and/or government agencies may retain rights in such intellectual property, including the right to grant or require us to grant mandatory licenses or sublicenses to such intellectual property to third parties under certain specified circumstances, including if it is necessary to meet health and safety needs that we are not reasonably satisfying or if it is necessary to meet requirements for public use specified by federal regulations, or to manufacture products in the United States. Any exercise of such rights, including with respect to any such required sublicense of these licenses, could result in the loss of significant rights and could harm our ability to commercialize licensed products. For example, research resulting in future in‑licensed patent rights and technology that was funded in part by the U.S. government could result in the government having certain rights, or march‑in rights, to such patent rights and technology which may permit the government to disclose our confidential information to third parties and to exercise march‑in rights to use or allow third parties to use our licensed technology, potentially on unfavorable terms or without adequate compensation.

Any trademarks we may obtain may be infringed or successfully challenged, resulting in harm to our business.

We expect to rely on trademarks as one means to distinguish our company’s name and logo, as well as to distinguish the name and logos used with any of our product candidates that are approved for marketing from the products of our competitors. We have not yet selected trademarks for our product candidates and have not yet begun the process of applying to register trademarks for our current or any future product candidates. Once we select trademarks and apply to register them, our trademark applications may not be approved. For example, our U.S. trademark registration for MINDMED covers a narrower list of goods than we initially sought to include in the registration because the USPTO cited a third-party trademark application as an obstacle to registration with a broader list of goods and services. Our new trademark applications for DEFINIUM THERAPEUTICS, our new logo, and our new tagline have not yet been filed and examined in each jurisdiction in which we intend to pursue trademark registrations. Third parties may oppose our trademark applications or otherwise challenge our use of the trademarks. In the event that our trademarks are successfully challenged, we could be forced to rebrand our products, which could result in loss of brand recognition and could require us to devote resources to advertising and marketing new brands. Our competitors may infringe our trademarks, and we may not have adequate resources to enforce our trademarks.

Under U.S. law, registration of a trademark requires lawful use of the mark in commerce. The USPTO may determine that our use of the trademark for our goods and services does not meet the statutory requirements for lawful use in commerce for registering a trademark if, for example, our products remain on Schedule I of the CSA. Consequently, the USPTO may refuse to register our trademarks, and existing registrations could be subject to cancellation. Furthermore, our ability to enforce our trademarks in U.S. federal courts or to prevent others from using similar marks may be limited due to these federal restrictions. This could lead to increased risks of infringement, dilution of our brand, and legal disputes that are difficult to resolve favorably. We may face analogous restrictions on protecting and enforcing trademarks in other jurisdictions internationally, and the requirements for lawful use of trademarks vary from country to country.

The cost to us of any trademark litigation or other trademark proceeding such as an opposition or cancellation action, even if resolved in our favor, could be substantial. Trademark litigation and other proceedings may fail, and even if successful, may result in substantial costs and distract our management and other employees. Uncertainties resulting from the initiation and continuation of trademark litigation or other proceedings could impair our ability to compete in the marketplace.

In addition, any proprietary name we propose to use with our current or any other product candidate in the United States must be approved by the FDA, regardless of whether we have registered it, or applied to register it, as a trademark. The FDA typically conducts a review of proposed product names, including an evaluation of the potential for confusion with other product names. If the FDA objects to any of our proposed proprietary product names, we may be required to expend significant additional resources

in an effort to identify a suitable proprietary product name that would qualify under applicable trademark laws, not infringe the existing rights of third parties and be acceptable to the FDA.

Risks Related to our Dependence on Third Parties

We rely on third parties to supply and manufacture DT120 ODT, DT402 and our other product candidates, and we will rely on third parties to manufacture these substances for commercial supply, if approved. If any third-party provider fails to meet its obligations manufacturing our product candidates, or fails to maintain or achieve satisfactory regulatory compliance, the development of such substances and the commercialization of any product candidates, if approved, could be stopped, delayed or made commercially unviable, less profitable or may result in enforcement actions against us.

We do not currently have, nor do we plan to acquire, the infrastructure or capability necessary to manufacture DT120 ODT, DT402 or any other product candidates, including the lysergide, R(-)-MDMA or other controlled substances incorporated into such product candidates. We rely on, and expect to continue to rely on, CDMOs, for the development, manufacture and production of the lysergide used in our product candidates administered in our clinical trials and will continue to rely on such CDMOs for the development, manufacture, testing and production of any commercial supply, if our product candidates are approved. Currently, we engage with multiple CDMOs for all activities relating to the development, manufacture and production of all our product candidates including active pharmaceutical ingredients (“API”), bulk drug product, and final drug product. Reliance on third-party providers, such as CDMOs, exposes us to more risk than if we were to manufacture our product candidates at our own facilities. While we subject our suppliers of DT120 ODT, DT402 or any of our other product candidates, including our current supplier of active pharmaceutical ingredient, to strict manufacturing requirements and rigorous testing requirements through audits and oversight in order to ensure compliance with cGMP and other manufacturing regulations, such suppliers are still subject to inspection by the FDA and other applicable regulatory authorities and there can be no assurance that they are in compliance with all applicable regulations. Our failure, or the failure of third-party manufacturers, to comply with applicable regulations could result in sanctions being imposed on us, including fines, injunctions, civil penalties, delays, suspension or withdrawal of approvals, license revocation, seizures or recalls of DT120 ODT, DT402 or any other product candidates, operating restrictions and criminal prosecutions, any of which could significantly and adversely affect supplies of DT120 ODT, DT402 or any other product candidates and harm our business and results of operations.

If we were to experience an unexpected loss of supply of or if any supplier were unable to meet our demand for DT120 ODT, DT402 or any other product candidates, we could experience delays in our research or planned clinical studies or commercialization. In addition, quality issues may arise during scale-up activities. We could be unable to find alternative suppliers of acceptable capability and quality, in the appropriate volumes and at an acceptable cost. For example, we have engaged a single supplier for the production of lysergide tartrate. Because lysergide tartrate is a controlled substance and subject to increased regulation resulting from that classification, if we are unable to rely on our current supplier for lysergide tartrate, we may experience delays or increased costs in obtaining an alternative provider or we may be unable to find an alternative supplier on acceptable terms. The long transition periods necessary to switch manufacturers and suppliers, if necessary, may significantly delay our preclinical studies and clinical trials and the commercialization of our product candidates, if approved, which would materially adversely affect our business, prospects, financial condition and results of operations.

In complying with the manufacturing requirements of the FDA, the DEA and other comparable foreign authorities, we and our third-party suppliers must spend significant time, money and effort in the areas of design and development, testing, production, record-keeping and quality control to assure that the product candidates meet applicable specifications and other regulatory requirements. The failure to comply with these requirements could result in an enforcement action against us, including the seizure of product candidates and shutting down of production, any of which could materially adversely affect our business, prospects, financial condition and results of operations. We and any of these third-party suppliers may also be subject to inspections by the FDA, the DEA and other comparable foreign authorities. If any of our third-party suppliers fails to comply with cGMP or other applicable manufacturing regulations, our ability to develop and commercialize the product candidates could suffer significant interruptions. We face risks inherent in relying on a limited number of CDMOs, as any disruption, such as a fire, natural hazards or vandalism at the CDMO, or a change in operations as a result of the sale of one of our CDMOs, could significantly interrupt our manufacturing capability. For example, we have engaged Catalent as the exclusive supplier of DT120 ODT. In December 2024, Catalent completed its merger with Novo Holdings A/S. While we have not experienced any impact on our relationship with Catalent to date, the merger may impact Catalent’s management and operations, which could significantly impact our supply chain and require us to find a new CDMO to provide clinical and commercial supplies, if DT120 ODT is approved. We currently do not have disaster recovery facilities available for our product candidates. In case of a disruption, we will have to establish alternative manufacturing sources. This would require substantial time and capital on our part, which we may not be able to obtain on commercially acceptable terms or at all, and we would likely experience months of manufacturing delays as we build or locate replacement facilities and seek and obtain necessary regulatory approvals. If this occurs, we may be unable to satisfy manufacturing

needs on a timely basis or at all. In addition, operating any new facilities may be more expensive than operating our current facility, and business interruption insurance may not adequately compensate us for any losses that may occur, in which case we would have to bear the additional cost of any disruption. For these reasons, a significant disruptive event of the manufacturing facility could have a material adverse effect on our business, including placing our financial stability at risk.

We rely, and expect to continue to rely, on third parties, including independent clinical investigators, academic collaborators and CROs, to conduct our preclinical studies and clinical trials. If these third parties do not successfully carry out their contractual duties or meet expected deadlines, we may not be able to obtain regulatory approval for or commercialize our product candidates and our business could be substantially harmed.

We have relied upon and plan to continue to rely upon third parties, including independent clinical investigators, academic collaborators and third-party CROs, to conduct our preclinical studies and clinical trials and to monitor and manage data for our ongoing preclinical and clinical programs. We rely on these parties for execution of our preclinical studies and clinical trials, and control only certain aspects of their activities. Nevertheless, we are responsible for ensuring that each of our studies and trials is conducted in accordance with the applicable protocol, legal and regulatory requirements and scientific standards, and our reliance on these third parties does not relieve us of our regulatory responsibilities. We and our third-party contractors and CROs are required to comply with GCP requirements, which are regulations and guidelines enforced by the FDA, the national competent authorities of the EU Member States, the MHRA and comparable foreign regulatory authorities for all of our product candidates in clinical development.

Regulatory authorities enforce these GCPs through periodic inspections of trial sponsors, principal investigators and trial sites. If we, our investigators, academic collaborators or any of our CROs fail to comply with applicable GCPs, the clinical data generated in our clinical trials may be deemed unreliable and the FDA or comparable foreign regulatory authorities may require us to perform additional clinical trials before approving our marketing applications. We cannot assure you that upon inspection by a given regulatory authority, such regulatory authority will determine that any of our clinical trials comply with GCP regulations. In addition, our clinical trials must be conducted with product produced under cGMP regulations. Our failure, or the failure of our third-party contractors and CROs, to comply with these regulations may require us to repeat clinical trials, which would delay the regulatory approval process and could also subject us to enforcement action up to and including civil and criminal penalties.

Further, these investigators, academic collaborators and CROs are not our employees and we will not be able to control, other than by contract, the amount of resources, including time, which they devote to our product candidates and clinical trials. If independent investigators, academic collaborators or CROs fail to devote sufficient resources to the development of our product candidates, or if their performance is substandard, it may delay or compromise the prospects for approval and commercialization of our product candidates that we develop. In addition, the use of third-party service providers requires us to disclose our proprietary information to these parties, which could increase the risk that this information will be misappropriated. In addition, investigators, academic collaborators and CROs may have difficulty staffing, undergo changes in priorities or become financially distressed or form relationships with other entities, some of which may be our competitors, any of which materially adversely affect our business.

Our CROs have the right to terminate their agreements with us in the event of an uncured material breach. In addition, some of our CROs have an ability to terminate their respective agreements with us if it can be reasonably demonstrated that the safety of the subjects participating in our clinical trials warrants such termination, if we make a general assignment for the benefit of our creditors or if we are liquidated.

There is a limited number of third-party service providers that specialize in or have the expertise required to achieve our business objectives. If any of our relationships with these third-party CROs or clinical investigators terminate, we may not be able to enter into arrangements with alternative CROs, academic collaborators or investigators on commercially reasonable terms or at all. If CROs, academic collaborators or clinical investigators do not successfully carry out their contractual duties or obligations or meet expected deadlines, or if they need to be replaced or if the quality or accuracy of the clinical data they obtain is compromised due to the failure to adhere to our clinical protocols, regulatory requirements or for other reasons, our clinical trials may be extended, delayed or terminated and we may not be able to obtain regulatory approval for or successfully commercialize our product candidates. As a result, our results of operations and the commercial prospects for our product candidates would be harmed, our costs could increase and our ability to generate revenue could be delayed.

Switching or adding additional CROs (or investigators) involves additional cost and requires management time and focus. In addition, delays occur during the natural transition period when a new CRO commences work, which can materially impact our ability to meet our desired development timelines. Though we carefully manage our relationships with our CROs, there can be no assurance that we will not encounter similar challenges or delays in the future, or that these delays or challenges will not have a material adverse impact on our business or financial condition and prospects.

If we decide to establish collaborations, but are not able to establish those collaborations on commercially reasonable terms, we may have to alter our development and commercialization plans.

Our product development programs and the potential commercialization of our product candidates will require substantial additional cash to fund expenses. We may seek to selectively form collaborations to expand our capabilities, potentially accelerate research and development activities and provide for commercialization activities by third parties. Any of these relationships may require us to incur non-recurring and other charges, increase our near- and long-term expenditures, issue securities that dilute our existing shareholders, or disrupt our management and business.

We would face significant competition in seeking appropriate collaborators and the negotiation process is time-consuming and complex. Whether we reach a definitive agreement for a collaboration will depend, among other things, upon our assessment of the collaborator’s resources and expertise, the terms and conditions of the proposed collaboration and the proposed collaborator’s evaluation of a number of factors. Those factors may include the design or results of clinical trials, the likelihood of approval by the FDA or comparable foreign regulatory authorities, the potential market for the subject product candidate, the costs and complexities of manufacturing and delivering such product candidate to patients, the potential of competing drugs, the existence of uncertainty with respect to our ownership of intellectual property and industry and market conditions generally. The potential collaborator may also consider alternative product candidates or technologies for similar indications that may be available to collaborate on and whether such collaboration could be more attractive than the one with us for our product candidate. Further, we may not be successful in our efforts to establish a collaboration or other alternative arrangements for product candidates because they may be deemed to be at too early of a stage of development for collaborative effort and third parties may not view them as having the requisite potential to demonstrate safety and efficacy.

If and when we seek to enter into collaborations, we may not be able to negotiate collaborations on a timely basis, on acceptable terms, or at all. If we are unable to do so, we may have to curtail the development of a product candidate, reduce or delay its development program or one or more of our other development programs, delay its potential commercialization or reduce the scope of any sales or marketing activities, or increase our expenditures and undertake development or commercialization activities at our own expense. If we elect to increase our expenditures to fund development or commercialization activities on our own, we may need to obtain additional capital, which may not be available to us on acceptable terms or at all. If we do not have sufficient funds, we may not be able to further develop our product candidates or bring them to market and generate product revenue.

We may enter into collaborations with third parties for the development and commercialization of product candidates. If those collaborations are not successful, we may not be able to capitalize on the market potential of these product candidates.

If we enter into any collaboration arrangements with any third parties, we will likely have limited control over the amount and timing of resources that our collaborators dedicate to the development or commercialization of our product candidates. Our ability to generate revenues from these arrangements will depend on our collaborators’ abilities and efforts to successfully perform the functions assigned to them in these arrangements. Collaborations involving our product candidates would pose numerous risks to us, including the following:

Risks Related to the Securities Markets and Ownership of our Common Shares

The price of our common shares is volatile.

The trading price of our common shares is highly volatile and subject to wide fluctuations in response to various factors, some of which we cannot control. The stock market in general, and pharmaceutical and biotechnology companies in particular, have experienced extreme price and volume fluctuations that have often been unrelated or disproportionate to the operating performance of these companies.

Broad market and industry factors may negatively affect the market price of our common shares, regardless of our actual operating performance. These factors include, but are not limited to, the following, many of which are discussed in greater detail elsewhere in this “Risk Factors” section and elsewhere in this Annual Report:

Stock markets in general and our share price in particular have recently experienced extreme price and volume fluctuations that have often been unrelated or disproportionate to the operating performance of those companies and our company. For example, from January 1, 2025 to December 31, 2025, the closing price of our common shares on Nasdaq ranged from as low as $4.89 to as high as $14.20 and daily trading volume ranged from approximately 478,685 to 11,195,650 shares on Nasdaq. During this time, we have not experienced any material changes in our financial condition or results of operations that would explain such price volatility or trading volume. These broad market fluctuations may adversely affect the trading price of our common shares. In particular, a large proportion of our common shares have been and may continue to be traded by short sellers which has put and may continue to put pressure on the supply and demand for our common shares, further influencing volatility in their market price. Additionally, these and other external factors have caused and may continue to cause the market price and demand for our common shares to fluctuate, which may limit or prevent investors from readily selling their common shares and may otherwise negatively affect the liquidity of our common shares.

The realization of any of the above risks or any of a broad range of other risks, including those described in this “Risk factors” section, could have a dramatic and adverse impact on the market price of our common shares.

Our operating results may fluctuate significantly, which would make our future operating results difficult to predict and could cause our operating results to fall below expectations or our guidance.

Our quarterly and annual operating results may fluctuate significantly in the future, which would make it difficult to predict our future operating results. From time to time, we may enter into license or collaboration agreements or strategic partnerships with other companies that include development funding and significant upfront and milestone payments and/or royalties, which may become an important source of our revenue. These upfront and milestone payments may vary significantly from period to period and any such variance could cause a significant fluctuation in our operating results from one period to the next.

In addition, we measure compensation cost for stock-based awards made to employees at the grant date of the award, based on the fair value of the award as determined by our Board of Directors, and recognize the cost as an expense over the employee’s requisite service period. As the variables that we use as a basis for valuing these awards change over time, including, our underlying share price and share price volatility, the magnitude of the expense that we must recognize may vary significantly.

Furthermore, our operating results may fluctuate due to a variety of other factors, many of which are outside of our control and may be difficult to predict, including the following:

The cumulative effect of these factors could result in large fluctuations and unpredictability in our quarterly and annual operating results. As a result, comparing our operating results on a period-to-period basis may not be meaningful. Investors should not rely on our past results as an indication of our future performance. This variability and unpredictability could also result in our failing to meet the expectations of industry or financial analysts or investors for any period. If our revenue or operating results fall below the expectations of analysts or investors or below any forecasts we may provide to the market, or if the forecasts we provide to the market are below the expectations of analysts or investors, the price of our common shares could decline substantially. Such a share price decline could occur even when we have met any previously publicly stated guidance we may provide.

Information that is published by third parties, including blogs, articles, message boards and social and other media, has in the past and may in the future include statements not attributable to us and may not be reliable or accurate.

We have received, and may continue to receive, media coverage that is published or otherwise disseminated by third parties, including blogs, articles, message boards and social and other media. This includes coverage that is not attributable to statements made by our directors, officers or employees. For example, we are aware of disputes amongst individuals and entities formerly involved with our company, including a lawsuit brought against Stephen Hurst, a former executive and director of the Company, and others. Though we are not party to this litigation, there can be no assurance that our business, reputation, share price or operations will not be negatively impacted by such disputes or any negative publicity surrounding such disputes. You should read carefully, evaluate and rely only on the information contained in our SEC filings in determining whether to purchase our securities. Information provided by third parties may not be reliable or accurate and could materially impact the trading price of our common shares, which could cause losses to your investments.

Our business and operations could be negatively affected if we become subject to any securities litigation or shareholder activism, which could cause us to incur significant expense, hinder execution of business and growth strategies and impact our share price.

In the past, following periods of volatility in the market price of a company’s securities, securities class action litigation has often been brought against that company. Shareholder activism, which could take many forms or arise in a variety of situations, has been increasing recently. Volatility in the stock price of our common shares or other securities or other reasons may in the future cause us to become the target of securities litigation or shareholder activism. For example, a group of our shareholders nominated four director candidates for election to our six-member Board of Directors at our 2023 annual general meeting of shareholders, and waged a proxy contest in support of their candidates and in opposition to four of our Board’s director nominees. Securities litigation and shareholder activism, including potential proxy contests, could result in substantial costs and divert management's and our Board’s attention and resources from our business. Further, a future proxy contest, unsolicited takeover proposal, or other shareholder activism relating to the election of directors or other matters would most likely result in significant legal fees and proxy solicitation expenses and require significant time and attention. Even if not formally launched, the potential of a proxy contest, unsolicited takeover proposal, or other shareholder activism could interfere with our ability to execute on our strategic plan, give rise to perceived uncertainties as to our future direction, result in the loss of potential business opportunities or make it more difficult to attract and retain qualified personnel, any of which could materially and adversely affect our business and operating results. Further, our share price could be subject to significant fluctuation or otherwise be adversely affected by the events, risks and uncertainties of any securities litigation and shareholder activism.

Actions of activist shareholders against us have been and could be disruptive and costly, may cause uncertainty about the strategic direction of our business, result in litigation, divert management’s and our Board’s attention and resources, and may have an adverse effect on our business and stock price.

From time to time, we may be subject to proposals by activist shareholders urging us to take certain corporate actions or to nominate certain individuals to our Board of Directors. For example, a group of our shareholders nominated four director candidates for election to our six-member Board of Directors at our 2023 annual general meeting of shareholders, and waged a proxy contest in support of their candidates and in opposition to four of our Board’s director nominees. Future activist shareholder matters, including a proxy contest and potential related litigation, could have a material adverse effect on us for the following reasons:

Our articles and certain Canadian legislation contain provisions that may have the effect of delaying or preventing certain change in control transactions or shareholder proposals. Any of these provisions may discourage a potential acquirer from proposing or completing a transaction that may have otherwise presented a premium to our shareholders.

Certain provisions of our articles and certain Canadian legislation, together or separately, could discourage or delay certain change in control transactions or shareholder proposals.

Under our articles, we are required to comply with certain advance notice procedures for nomination of candidates for election as directors at shareholders’ meetings. These provisions may frustrate or prevent any attempts by our shareholders to replace or remove our current management by making it more difficult for shareholders to replace members of our Board of Directors, which is responsible for appointing the members of our management.

The Investment Canada Act requires that a non-Canadian must file an application for review with the Minister responsible for the Investment Canada Act and obtain approval of the Minister prior to acquiring control of a “Canadian business” within the meaning of the Investment Canada Act, where prescribed financial thresholds are exceeded. Furthermore, limitations on the ability to acquire and hold our Common Shares may be imposed by the Competition Act (Canada). This legislation permits the Commissioner of Competition (the "Commissioner"), to review any acquisition or establishment, directly or indirectly, including through the acquisition of shares, of control over or of a significant interest in our company. Otherwise, there are no limitations either under the laws of Canada or the Province of British Columbia, or in our articles on the rights of non-Canadians to hold or vote our common shares.

We are governed by the corporate laws in British Columbia, Canada which in some cases have a different effect on shareholders than the corporate laws in Delaware, United States.

There are material differences between the BCBCA and the Delaware General Corporation Law (the “DGCL”), including the following: (i) under the BCBCA, significant corporate actions, such as continuances, certain amalgamations, sales, leases or other dispositions of all or substantially all of the undertaking of a company (other than in the ordinary course of business), liquidations, dissolutions and certain arrangements, require the approval of at least two thirds of the votes cast by a company’s shareholders, whereas under Delaware law, a majority of the total voting power of outstanding shares entitled to vote on the matter is generally required for such matters; (ii) under the BCBCA shareholders holding at least 1/20 of our issued and outstanding common shares can requisition a general meeting at which any matters that can be voted on at our annual meeting can be considered, whereas the DGCL does not give this right; (iii) our articles require two-thirds majority vote by shareholders to pass a resolution for one or more directors to be removed, whereas DGCL only requires the affirmative vote of a majority of the shareholders; however, many public company charters limit removal of directors to a removal for cause; and (iv) our articles may be amended by resolution of our directors to alter our authorized share structure, including to (a) consolidate or subdivide any of our shares and (b) alter the identifying name of any of our shares, whereas under DGCL, a majority vote by shareholders is generally required to amend a corporation’s certificate of incorporation and a separate class vote may be required to authorize alterations to a corporation’s authorized share structure. We cannot predict if investors will find our common shares less attractive because of these material differences. If some investors find our common shares less attractive as a result, there may be a less active trading market for our common shares and our share price may be more volatile.

General Risk Factors

Our ability to use our net operating loss carryforwards and certain other tax attributes to offset future taxable income and taxes may be limited.

Our net operating loss ("NOL") carryforwards may be unavailable to offset future taxable income because of restrictions under U.S. tax law. U.S. federal NOLs incurred in tax years beginning after December 31, 2017, may be carried forward indefinitely, but the deductibility of such U.S. federal NOLs, is limited to 80% of taxable income. As of December 31, 2025, we had available U.S. federal NOL carryforwards of $323.4 million which can be carried forward indefinitely. We also have available state NOL carryforwards of approximately $20.0 million as of December 31, 2025, which will begin to expire in 2037.

In addition, under Sections 382 and 383 of the U.S. Internal Revenue Code of 1986 (as amended) (the “Code”), if a corporation undergoes an “ownership change” (generally defined as a cumulative change in the corporation’s ownership by “5-percent shareholders” that exceeds 50 percentage points over a rolling three-year period), the corporation’s ability to use its pre-ownership change NOLs and certain other pre-ownership change tax attributes to offset its post-ownership change taxable income may be limited. Similar rules may apply under state tax laws. We may have experienced such ownership changes in the past, and we may experience ownership changes in the future as a result of shifts in our share ownership, some of which are outside our control. We have not conducted any studies to determine annual limitations, if any, that could result from such changes in the ownership of the Company. As a result, our ability to utilize our NOLs and certain other tax attributes could be limited.

There is also a risk that regulatory changes could cause our existing NOLs to expire or otherwise be unavailable to reduce future income tax liabilities. Consequently, we may not be able to utilize a material portion of our NOLs and certain other tax attributes, which could have a material adverse effect on our cash flows and results of operations.

We will be subject to Canadian and United States tax on our worldwide income.

We will be deemed to be a resident of Canada for Canadian federal income tax purposes by virtue of being incorporated under the laws of a province of Canada. Accordingly, we will be subject to Canadian taxation on our worldwide income, in accordance with the rules in the Income Tax Act (Canada) (the “Tax Act”) generally applicable to corporations resident in Canada.

Notwithstanding that we will be deemed to be a resident of Canada for Canadian federal income tax purposes, we are treated as a U.S. corporation for U.S. federal income tax purposes, pursuant to Section 7874(b) of the Code, and the U.S. Treasury Regulations promulgated thereunder. Accordingly, we will be subject to a number of significant and complicated U.S. federal income tax consequences as a result of being treated as a U.S. domestic corporation for U.S. federal income tax purposes and will be subject to taxation on our worldwide income both in Canada and the United States, which could have a material adverse effect on our financial condition and results of operations.

Dispositions of common shares may be subject to Canadian tax and/or United States tax, and dividends on common shares will be subject to Canadian and/or United States taxes.

Dispositions of common shares will not be subject to Canadian tax, unless the common shares constitute “taxable Canadian property” (as defined in the Tax Act) of a holder of the common shares that is a non-resident of Canada for purposes of the Tax Act. Such holders whose common shares may constitute taxable Canadian property should consult their own tax advisors. In addition, dispositions of common shares by U.S. Holders (as defined below) will be subject to U.S. tax, and certain dispositions of common shares by Non-U.S. Holders (including if we are treated as a U.S. real property holding corporation (“USRPHC”)) will be subject to U.S. tax, as described below.

It is currently not anticipated that we will pay any dividends on the common shares in the foreseeable future. However, to the extent dividends are paid on the common shares, dividends received by shareholders who are residents of Canada for purposes of the Tax Act (and Non-U.S. Holders for purposes of the Code) will be subject to U.S. withholding tax. Any such dividends may not qualify for a reduced rate of withholding tax under the Canada-United States income tax treaty (the “Treaty”). In addition, a Canadian foreign tax credit or a deduction in respect of such U.S. withholding taxes paid may not be available.

Dividends received by U.S. Holders will not be subject to U.S. withholding tax but will be subject to Canadian withholding tax, subject to any reduction in the rate of withholding under the Treaty. Any such dividends may not qualify for a reduced rate of withholding tax under the Treaty. Dividends paid by us will be characterized as U.S. source income for purposes of the foreign tax

credit rules under the Code. Accordingly, U.S. Holders may not be able to claim a credit for any Canadian tax withheld unless, depending on the circumstances, they have other foreign source income that is subject to a low or zero rate of foreign tax.

Dividends received by shareholders that are neither Canadian nor U.S. shareholders will be subject to U.S. withholding tax and will also be subject to Canadian withholding tax. These dividends may not qualify for a reduced rate of U.S. withholding tax under any income tax treaty otherwise applicable to a shareholder of ours, subject to examination of the relevant treaty. These dividends may, however, qualify for a reduced rate of Canadian withholding tax under any income tax treaty otherwise applicable to a shareholder of ours, subject to examination of the relevant treaty.

For purposes hereof, a “U.S. Holder” is a beneficial holder of common shares who or that, for U.S. federal income tax purposes, is:

For purposes hereof, a “Non-U.S. Holder” means a beneficial owner of common shares that is not a U.S. Holder (except that, with respect to an entity (or other arrangement taxable as a partnership for U.S. federal income tax purposes), a “Non-U.S. Holder” refers to any partner in such partnership that is not a U.S. Holder as defined above).

As a U.S. domestic corporation for U.S. federal income tax purposes, any gain realized by our Non-U.S. Holders upon a disposition of our common shares generally will not be subject to U.S. federal income tax unless:

We believe that we presently are not a USRPHC and do not presently anticipate that we will become a USRPHC. However, because this determination is made from time to time and is dependent upon a number of factors, some of which are beyond our control, including the value of our assets, there can be no assurance that we will not become a USRPHC.

We may incur significant tax liabilities as a result of Section 280E of the Code that could negatively impact the results of our operations.

Section 280E of the Code generally prohibits businesses from deducting or claiming tax credits with respect to expenses paid or incurred in carrying on any trade or business if such trade or business (or the activities which comprise such trade or business) consists of trafficking in controlled substances (within the meaning of Schedule I and II of the CSA) which are prohibited by federal law or the law of any state in which such trade or business is conducted. The application of Section 280E of the Code generally causes such businesses to have an effective tax rate in the United States that is significantly higher than the rate typically applicable to businesses in other industries. The IRS has invoked Section 280E of the Code in tax audits against various businesses in the United States, even when the business activities were permitted under applicable state laws. Although the IRS issued a clarification of Section 280E of the Code that allows the deduction of certain expenses, the scope of such deduction is generally interpreted very narrowly and as a result the bulk of operating costs and general administrative costs are not permitted to be deducted in the United States. In addition, there can be no assurance that courts, in response to challenges of these restrictions by taxpayers, will issue an interpretation of Section 280E of the Code favorable to our businesses.

Item 1B. Unresolved Staff Comments.

None.

Item 2. Properties.

Our U.S. corporate address is located at One World Trade Center Suite 8500, New York, New York 10007, where we lease office space as well as shared use of office services and facilities. The term of the lease automatically renews every six months.

We lease additional office space in San Diego, California, Durham, North Carolina and Madison, Wisconsin. The term of our North Carolina lease commenced in April 2022 and expires in February 2031. The term of our California lease commenced in September 2025 and expires in August 2026. The term of our Wisconsin lease commenced in February 2026 and expires in January 2029.

Item 3. Legal Proceedings.

From time to time, we may become involved in litigation or other legal proceedings arising in the ordinary course of our business. We are not currently a party to any material litigation or legal proceedings that, in the opinion of our management, are likely to have a material adverse effect on our business.

Item 4. Mine Safety Disclosures.

Not applicable.

PART II

Item 5. Market for Registrant’s Common Equity, Related Stockholder Matters and Issuer Purchases of Equity Securities.

Market Information for Our Common Shares

Our common shares are publicly traded on the Nasdaq Global Select Market under the symbol “DFTX”. Prior to January 15, 2026, our common shares traded on the Nasdaq Global Select Market under the symbol “MNMD”.

Holders of Record

As of December 31, 2025, there were approximately 83 shareholders of record of our common shares. The actual number of shareholders is greater than this number of record holders and includes shareholders who are beneficial owners but whose shares are held in street name by brokers and other nominees.

Dividend Policy

We have not declared or paid any cash dividends on our share capital since our inception. We intend to retain future earnings, if any, to finance the operation and expansion of our business and do not anticipate paying any cash dividends in the foreseeable future. Payment of future cash dividends, if any, will be at the discretion of our Board of Directors after taking into account various factors, including our financial condition, operating results, current and anticipated cash needs, the requirements and contractual restrictions of then-existing debt instruments, and other factors that our Board of Directors deems relevant.

Recent Sales of Unregistered Securities

None.

Purchases of Equity Securities by the Issuer

None.

Item 6. Reserved.

Item 7. Management’s Discussion and Analysis of Financial Condition and Results of Operations.

The following discussion should be read in conjunction with the consolidated financial statements and notes thereto included elsewhere in this Annual Report. This Annual Report, including the following section, contains forward-looking statements. These statements are subject to risks and uncertainties that could cause actual results and events to differ materially from those expressed or implied by such forward-looking statements. For a detailed discussion of these risks and uncertainties, see Item 1A “Risk Factors” in this Annual Report. See also “Special Note Regarding Forward-Looking Statements.” We caution the reader not to place undue reliance on these forward-looking statements, which reflect management’s analysis only as of the date of this Annual Report. We undertake no obligation to update forward-looking statements, which reflect events or circumstances occurring after the date of this Annual Report, except as required by law.

Our U.S. GAAP accounting policies are referred to in Note 2 of the Consolidated Financial Statements. All amounts are in United States dollars, unless otherwise indicated.

Overview

We are a late-stage clinical biopharmaceutical company developing novel product candidates to treat brain health disorders. Our mission is to forge a new era of psychiatry by applying scientific rigor to psychedelics, with the goal of developing accessible treatments that unlock healing at scale. This specifically includes pharmaceutically optimized product candidates derived from the psychedelic and empathogen drug classes including DT120 and DT402, our lead product candidates.

Our lead product candidate, DT120 ODT, is a proprietary, pharmaceutically optimized form of lysergide D-tartrate that we are developing for the treatment of adults with generalized anxiety disorder and major depressive disorder. In December 2023, we announced positive topline results from our Phase 2b clinical trial of DT120 for the treatment of GAD. The trial met its primary endpoint, with DT120 demonstrating statistically significant and clinically meaningful dose-dependent improvements on the Hamilton Anxiety Rating Scale ("HAM-A") compared to placebo at Week 4. In March 2024, we announced that the U.S. Food and Drug Administration ("FDA") granted breakthrough designation to our DT120 program for the treatment of GAD. We also announced in March 2024 that our Phase 2b clinical trial of DT120 in GAD met its key secondary endpoint, and 12-week topline data demonstrated clinically and statistically significant durability of activity observed through Week 12. In September 2025, we announced that the full results from our Phase 2b clinical trial of DT120 in GAD had been published in the Journal of the American Medical Association.

On June 20, 2024, we announced the completion of our End-of-Phase 2 meeting with the FDA, supporting the advancement of DT120 into pivotal trials for the treatment of adults with GAD. Our Phase 3 clinical program for DT120 ODT is expected to consist of two clinical trials: the Voyage study (DT120-300) and the Panorama study (DT120-301). Both trials are comprised of two parts: Part A, which is a 12-week, randomized, double-blind, placebo-controlled, parallel-group trial assessing the efficacy and safety of DT120 ODT versus placebo; and Part B, which is a 40-week extension period during which participants will be eligible for open-label treatment with DT120 ODT, subject to certain conditions for treatment eligibility. Voyage is anticipated to enroll approximately 200 participants (randomized 1:1 to receive DT120 ODT 100 µg or placebo) and Panorama is anticipated to enroll approximately 250 participants (randomized 2:1:2 to receive DT120 ODT 100 µg, DT120 ODT 50 µg or placebo). Both trials use an adaptive trial design with a blinded interim sample size re-estimation (“SSRE”), allowing for an increase in sample size by up to 50% in each trial depending on the observed values for certain nuisance parameters. The SSRE for Voyage has been completed and it was determined that no increase in the sample size of the trial is required. The primary endpoint for each trial is the change from baseline in HAM-A score at Week 12 between DT120 ODT 100 µg and placebo. In December 2024, we announced the initiation of Voyage, and we anticipate a topline readout (Part A results) in early third quarter 2026. On January 2025, we announced the initiation of Panorama, with an anticipated topline readout (Part A results) in the second half of 2026.

In addition to our Phase 3 clinical program for GAD, we are developing DT120 ODT for the treatment of adults with MDD. In the first quarter of 2024, we held a pre-IND meeting with FDA to discuss the initiation of our Phase 3 clinical program for DT120 ODT in MDD and the trial design for the Emerge study (DT120-310), which like our pivotal trials in GAD, we anticipate will be comprised of two parts: Part A, which is a 12-week, randomized, double-blind, placebo-controlled, parallel group trial assessing the efficacy and safety of DT120 ODT versus placebo; and Part B, which is a 40-week extension period during which participants will be eligible for open-label treatment with DT120 ODT, subject to certain conditions for treatment eligibility. Emerge is fully enrolled with 149 participants randomized 1:1 to receive DT120 ODT 100 µg or placebo. The primary endpoint is the change from baseline in Montgomery Åsberg Depression Rating Scale ("MADRS") score at Week 6 between DT120 ODT 100 µg and placebo. In April 2025, we announced the initiation of Emerge, and we anticipate a topline readout (Part A results) in late second quarter 2026.

We activated initial sites in our second Phase 3 clinical trial of DT120 ODT in MDD, Ascend (DT120-311), in the first quarter of 2026 and we expect to dose our first patient in this trial by early second quarter 2026. Ascend has a similar design to Emerge, with a 12-week, randomized, double-blind, placebo-controlled, parallel group design assessing the efficacy and safety of DT120 ODT versus placebo (Part A); and Part B, which includes a 40-week extension period during which participants will be eligible for open-label treatment with DT120 ODT. Ascend is anticipated to enroll approximately 175 participants (randomized 2:1:2 to receive DT120 ODT 100 µg, DT120 ODT 50 µg or placebo). The primary endpoint is the change from baseline in MADRS score at Week 6 between DT120 ODT 100 µg and placebo.

Our second lead product candidate, DT402, also referred to as R(-)-MDMA, is our proprietary form of the R-enantiomer of 3,4-methylenedioxymethamphetamine, which we are developing for the treatment of adults with ASD. MDMA is a synthetic molecule that is often referred to as an empathogen because it is reported to increase feelings of connectedness and compassion. Preclinical studies of R(-)-MDMA demonstrated its acute pro-social and empathogenic effects, while its diminished dopaminergic activity suggests that it has the potential to exhibit less stimulant activity, neurotoxicity, hyperthermia and abuse liability compared to racemic MDMA or the S(+)-enantiomer. In October 2024, we completed our first clinical trial of DT402, a single-ascending dose trial in adult healthy volunteers. The data from this Phase 1 clinical trial helped to characterize the tolerability, pharmacokinetics and pharmacodynamics of DT402.

We initiated a Phase 2a trial of DT402 in ASD in the fourth quarter of 2025. This study is a single-dose, open-label study to assess early signals of efficacy of DT402 in treating core socialization and communication symptoms in adults with ASD. This study is anticipated to enroll up to 20 participants. The objectives and endpoints of the study are designed to characterize the pharmacodynamics and clinical effects of DT402 in adults with ASD, including on multiple functional biomarkers. We anticipate initial data from our Phase 2a study in 2026.

Beyond our clinical stage product candidates, we are exploring additional programs, including through external collaborations, which we seek to expand our drug development pipeline and broaden the potential applications of our lead product candidates. These research and development programs include non-clinical, pre-clinical and human clinical trials of current and new product candidates and research compounds with our collaborators.

Our business is premised on a growing body of research supporting the use of novel psychoactive compounds to treat a myriad of brain health disorders. For all product candidates, we intend to proceed through research and development, and with marketing of the product candidates that may ultimately be approved pursuant to the regulations of the FDA and the regulations in other jurisdictions. This entails, among other things, conducting clinical trials with research scientists, using internal and external clinical drug development teams, producing and supplying product candidates according to current Good Manufacturing Practices (“cGMP”), and conducting all trials and development in accordance with the regulations of the FDA, and other regulations in other jurisdictions.

On January 9, 2026, we changed our corporate name from Mind Medicine (MindMed) Inc. to Definium Therapeutics, Inc. On January 12, 2026, we changed the name of our wholly-owned subsidiary from Mind Medicine, Inc. to Definium Therapeutics US, Inc. In connection with our name change, we began trading on Nasdaq under the symbol “DFTX” on January 15, 2026.

We were incorporated under the laws of the Province of British Columbia in 2010. Our wholly-owned subsidiary, Definium Therapeutics US, Inc. (“Definium US”), was incorporated in Delaware in 2019. Prior to February 27, 2020, our operations were conducted through Definium US.

Since inception, we have incurred losses while advancing the research and development of our products and processes. Our net losses were $183.8 million for the year ended December 31, 2025, and $108.7 million for the year ended December 31, 2024. As of December 31, 2025, we had an accumulated deficit of $582.7 million and cash, cash equivalents and investments of $411.6 million.

Components of Operating Results

Operating Expenses

Research and Development

Research and development expenses account for a significant portion of our operating expenses. Research and development expenses consist primarily of direct and indirect costs incurred for the development of our product candidates.

External expenses include:

We may also incur in-process research and development expenses as we acquire or in-license assets from other parties. Technology acquisitions are expensed or capitalized based upon the asset achieving technological feasibility in accordance with management’s assessment regarding the ultimate recoverability of the amounts paid and the potential for alternative future use. Acquired in-process research and development costs that have no alternative future use are immediately expensed.

Internal expenses include employee-related costs such as salaries, related benefits and non-cash stock-based compensation expense for employees engaged in research and development functions.

We expect our research and development expenses to increase in 2026 as we continue the clinical development of our product candidates and other preclinical programs in GAD and MDD and other potential or future indications, including initiating additional and larger clinical trials.

We expense research and development costs in the periods in which they are incurred. External expenses are recognized based on an evaluation of the progress to completion of specific tasks using information provided to us by our service providers or our estimate of the level of service that has been performed at each reporting date. We track external costs by program, clinical or preclinical. We do not track internal costs by program because these costs are deployed across multiple programs and, as such, are not separately classified.

General and Administrative

General and administrative expenses consist primarily of compensation costs, including stock-based compensation, for executive management and administrative employees, including finance and accounting, legal, human resources and other administrative functions, professional services fees, advisory and professional service fees in connection with financing transactions, insurance expenses, costs to support our commercialization efforts and allocated expenses.

We expect our general and administrative expenses to increase for the foreseeable future as we continue to advance our research and development programs, grow our business and, if any of our product candidates receive marketing approval, commence commercialization activities.

Results of Operations

Comparison of the Years Ended December 31, 2025 and 2024

The following tables summarize our results of operations for the periods presented (in thousands):

Operating Expenses

Research and Development (in thousands):

* DT120 other consists of expenses that support the broader DT120 program, including nonclinical studies and consulting expenses.

Research and development expenses increased by $52.4 million, or 80%, for the year ended December 31, 2025 compared to the year ended December 31, 2024. The increase was primarily due to an increase of $44.7 million in expenses related to our DT120 program which has ongoing pivotal trials for the treatment of adults with GAD and MDD. Additionally, there was an increase of $9.3 million in internal personnel costs as a result of increasing research and development capacities and an increase of $0.4 million in preclinical and other program expenses. Such expenses were partially offset by a decrease of $2.0 million in expenses related to our DT402 program driven primarily by lower expenses while we worked on the commencement of our Phase 2a trial which initiated in the fourth quarter of 2025.

General and Administrative

General and administrative expenses increased by $10.0 million, or 26%, for the year ended December 31, 2025 compared to the year ended December 31, 2024. The increase was primarily attributable to an increase of $6.0 million in professional services and pre-commercialization activities, an increase of $3.6 million in internal personnel costs to support expanded operational activities, an increase of $0.7 million in directors' deferred share unit ("DDSU") expenses due to an increase in the stock price year over year, and $0.5 million in miscellaneous general and administrative expenses, offset by a decrease of $0.8 million in legal and patent related expenses.

Other Income (Expense)

Interest Income

Interest income decreased by $0.6 million for the year ended December 31, 2025 compared to the year ended December 31, 2024. The decrease was primarily due to lower average interest rates in 2025 versus 2024.

Interest Expense

Interest expense increased by $3.2 million for the year ended December 31, 2025 compared to the year ended December 31, 2024. Interest expense is primarily related to our credit facility entered into in August 2023 and amended in April 2025. Interest expense in 2025 was higher than 2024 due to a larger outstanding balance on the credit facility and a $1.7 million final payment associated with the amendment.

Foreign Exchange Loss, Net

Foreign exchange loss decreased by $0.5 million for the year ended December 31, 2025 compared to the year ended December 31, 2024, the decrease was primarily due to favorable changes in foreign exchange rates during the year ended December 31, 2025.

Change in fair value of 2022 USD Financing Warrants

Revaluation loss on the 2022 USD Financing Warrants liability was $22.8 million and $15.9 million for the years ended December 31, 2025 and 2024, respectively. Change in fair value of 2022 USD Financing Warrants consists of revaluation gains and losses attributed to the change in the fair value of our 2022 USD Financing Warrants that were issued as part of our public equity offering which closed on September 30, 2022. Losses primarily reflect higher share prices and accordingly, increased warrant liability values, at the applicable year ends.

Gain on extinguishment of contribution payable

Gain on extinguishment of contribution payable was $2.5 million for the year ended December 31, 2024. In June 2024, we made a lump sum payment of $0.3 million in full satisfaction of our remaining obligations of the contribution payable liability. As a result, both parties were subsequently released from any further commitments from the agreement. The difference between the fair value of the lump sum payment of $0.3 million, and the carrying value of the contribution payable prior to the settlement of $2.8 million, resulted in the gain on extinguishment of $2.5 million.

Liquidity and Capital Resources

Sources of Liquidity

Since inception, we have financed our operations primarily from the issuance of equity and our Amended Loan Agreement. Our primary capital needs are for funds to support our scientific research and development activities including staffing, manufacturing, preclinical studies, clinical trials, pre-commercialization activities, administrative costs and for working capital.

We have experienced operating losses and cash outflows from operations since inception and will require ongoing financing in order to continue our research and development activities. We have not earned any revenue or reached successful commercialization of our product candidates. Our future operations are dependent upon our ability to finance our cash requirements, which will allow us to continue our research and development activities and the commercialization of our product candidates, if approved. There can be no assurance that we will be successful in continuing to finance our operations.

Our cash, cash equivalents and investments and our working capital at December 31, 2025 was $411.6 million and $352.6 million, respectively. Based on our current operating plan and anticipated R&D milestones, we believe that our cash, cash equivalents and investments as of December 31, 2025 will be sufficient to fund our operations into 2028.

On August 11, 2023, we entered into the Loan Agreement with K2HV as administrative agent and Canadian collateral agent for lenders thereunder, and Ankura Trust Company, LLC, as collateral trustee for the Lenders, providing for an aggregate principal amount of term loans of up to $50.0 million. On April 18, 2025, we entered into the First Amendment to the Loan Agreement with K2HV. The Amended Loan Agreement provides for, among other things, an aggregate principal amount of term loans of up to $120.0 million, consisting of (A) a new Restatement First Tranche Term Loan (as defined in the Amended Loan Agreement) of $42.0 million, which was funded on the Effective Date, a portion of the proceeds of which was used on the Effective Date to refinance in full all term loans outstanding under the original Loan Agreement, and to pay fees and expenses in connection with the Amended Loan Agreement and the refinancing of the existing term loans, (B) subsequent tranches of term loans totaling up to $28.0 million, subject to the occurrence of certain time-based clinical and regulatory milestones and (C) an additional tranche of term loans of up to $50.0 million upon our request, subject to review by the Lenders of certain information from us and discretionary approval by the Lenders.

On March 7, 2024, we entered into an underwriting agreement with Leerink Partners LLC and Cantor Fitzgerald & Co., as representatives of the underwriters named therein, in connection with the issuance and sale by us in an underwritten offering (the “March 2024 Offering”) of 16,666,667 of our common shares at an offering price of $6.00 per share, less underwriting discounts and commissions.

The net proceeds from the March 2024 Offering were approximately $93.5 million, after deducting underwriting discounts and commissions and other estimated offering expenses payable by us.

On March 7, 2024, we also entered into a securities purchase agreement with certain investors, pursuant to which the Investors agreed to purchase, and we agreed to sell 12,500,000 of our common shares at a price of $6.00 per share, in a private placement transaction (the “Private Placement”).

The net proceeds from the Private Placement were approximately $70.1 million, after deducting fees and expenses payable by us.

The March 2024 Offering and the Private Placement both closed on March 11, 2024.

On June 28, 2024, we entered into a sales agreement (the “Sales Agreement”) with Leerink Partners LLC (the “Agent”) to create an at-the-market equity program under which we from time to time may offer and sell the ATM Shares (as defined below), through or to the Agent. We filed a prospectus supplement on June 28, 2024 allowing for up to $150.0 million of Common Shares (the "ATM Shares") to be sold under the Sales Agreement.

Subject to the terms and conditions of the Sales Agreement, the Agent will use its commercially reasonable efforts to sell the ATM Shares from time to time, based upon our instructions. The Agent will be entitled to a commission of up to 3.0% of the aggregate gross proceeds from each sale of the ATM Shares effectuated through or to the Agent.

We have not sold any Common Shares under the 2024 ATM as of December 31, 2025. We have no obligation to sell any of the ATM Shares and may at any time suspend offers under the Sales Agreement or terminate the Sales Agreement.

On August 9, 2024, we entered into an underwriting agreement with Leerink Partners LLC and Evercore Group L.L.C., as representatives of the several underwriters named therein, in connection with an offering of (i) our common shares, and (ii) to certain investors, pre-funded warrants to purchase our common shares. The offering price for the common shares was $7.00 per share, less underwriting discounts and commissions (the “August 2024 Offering”). The offering price for the pre-funded warrants was $6.999 per pre-funded warrant, which represents the per share public offering price for the common shares less a $0.001 per share exercise price for each such pre-funded warrant.

The net proceeds from the August 2024 Offering were approximately $70.0 million, after deducting underwriting discounts and commissions and other offering expenses payable by us. The August 2024 Offering closed on August 12, 2024.

On October 29, 2025, we entered into an underwriting agreement (the “Underwriting Agreement”) with Jefferies LLC, Leerink Partners LLC and Evercore Group L.L.C., as representatives of the several underwriters named therein, in connection with an underwritten public offering (the “October 2025 Offering”) of 18,375,000 Common Shares, at an offering price of $12.25 per Common Share, less underwriting discounts and commissions. In addition, under the terms of the Underwriting Agreement, we granted the underwriters an option, exercisable for 30 days, to purchase up to an additional 2,756,250 Common Shares at the same price, which was

exercised by the underwriters in full on October 30, 2025.

The net proceeds from the October 2025 Offering were approximately $242.8 million, after deducting underwriting discounts and commissions and estimated offering expenses payable by us. The October 2025 Offering closed on October 31, 2025.

Future Funding Requirements

To date, we have not generated any revenue. We do not expect to generate any meaningful revenue unless and until we obtain regulatory approval of and commercialize any of our product candidates, and we do not know when, or if at all, that will occur. We will continue to require substantial additional capital to develop our product candidates and fund operations for the foreseeable future. Moreover, we expect our expenses to increase in connection with our ongoing activities, particularly as we continue the development of and seek regulatory approvals for our product candidates. Further, we are subject to all the risks incident in the development of new pharmaceutical products, and we may encounter unforeseen expenses, difficulties, complications, delays and other unknown factors that may harm our business. Our expenses will increase if, and as, we:

Based on our current operating plan and anticipated R&D milestones, we believe that our cash, cash equivalents and investments as of December 31, 2025 will be sufficient to fund our operations into 2028. However, our forecast of the period of time through which our financial resources will be adequate to support our operations is a forward-looking statement that involves risks and uncertainties, and actual results could vary materially. In order to complete the development of our product candidates and to build the sales, marketing and distribution infrastructure that we believe will be necessary to commercialize our product candidates, if approved, we will require substantial additional funding. Until we can generate a sufficient amount of revenue from the commercialization of our product candidates, we may seek to raise any necessary additional capital through the sale of equity, debt financings or other capital sources, which could include income from collaborations, strategic partnerships or marketing, distribution or licensing arrangements with third parties or from grants. To the extent that we raise additional capital through the sale of equity or convertible debt securities, the ownership interest of our shareholders will be or could be diluted, and the terms of these securities may include liquidation or other preferences that adversely affect the rights of our common shareholders. Debt financing and preferred equity financing, if available, may involve agreements that include covenants limiting or restricting our ability to take specific actions, including restricting our operations and limiting our ability to incur liens, issue additional debt, pay dividends, repurchase our common shares, make certain investments or engage in merger, consolidation, licensing or asset sale transactions. If we raise funds through collaborations, strategic partnerships and other similar arrangements with third parties, we may be required to grant rights to develop and market product candidates that we would otherwise prefer to develop and market ourselves. We may be unable to raise additional funds or enter into such agreements or arrangements on favorable terms, or at all. If we are unable to raise additional funds when needed, we may be required to delay, reduce or eliminate our product development or future commercialization efforts. We have based our projections of operating capital requirements on our current operating plan, which is based on several assumptions that may prove to be incorrect and we may use all of our available capital resources sooner than we expect. Because of the numerous risks and uncertainties associated with research, development and commercialization of product candidates, we are unable to estimate the exact amount and timing of our working capital requirements. Our future funding requirements will depend on many factors, including:

Cash Flows

Cash flows used in operating activities

Net cash used in operating activities for the year ended December 31, 2025 was $131.6 million, which consisted of a net loss of $183.8 million, partially offset by $42.8 million in non-cash charges and a net change of $9.4 million in our net operating assets and liabilities. The non-cash charges primarily consisted of share-based compensation of $20.1 million, a change in fair value on the 2022 USD Financing Warrants liability of $22.8 million, accretion of discounts and premiums on investments, net of $1.8 million and DDSU expense of $1.5 million.

Net cash used in operating activities for the year ended December 31, 2024 was $79.1 million, which consisted of a net loss of $108.7 million and a net change of $3.3 million in our net operating assets and liabilities, partially offset by $32.9 million in non-cash charges. The non-cash charges primarily consisted of share-based compensation of $16.9 million, a change in fair value on the 2022 USD Financing Warrants liability of $15.9 million, DDSU expense of $0.8 million, amortization of debt issuance costs of $0.7 million, unrealized foreign exchange of $0.5 million, and amortization of intangible assets of $0.5 million, partially offset by a gain on extinguishment of the contribution payable of $2.5 million.

Cash flows from investing activities

Net cash used in investing activities for the year ended December 31, 2025 consisted of purchases of investments of $268.4 million, offset by maturities of investments of $116.8 million.

Cash flows from financing activities

Net cash provided by financing activities for the year ended December 31, 2025 was $267.3 million, which consisted of $258.9 million of gross proceeds from the October 2025 Offering, $20.0 million in net proceeds from our amended credit facility, $3.7 million of proceeds from the exercise of the 2022 USD Financing Warrants, $0.6 million in proceeds from the exercise of options and $0.4 million in proceeds from the issuance of common shares in connection with our ESPP, partially offset by $15.9 million of issuance costs related to the October 2025 Offering and $0.4 million in credit facility issuance costs related to the amendment of our credit facility.

Net cash provided by financing activities for the year ended December 31, 2024 was $253.2 million, which consisted of $175.0 million of gross proceeds from the March 2024 Offering and Private Placement, $75.0 million in proceeds from the August 2024 Offering, $10.0 million proceeds from our credit facility, $8.3 million of proceeds from the exercise of the 2022 USD Financing Warrants, $1.0 million net proceeds from the 2022 ATM, net of issuance costs, and $0.7 million in proceeds from the exercise of options, partially offset by $11.1 million of issuance costs related to the March 2024 Offering and Private Placement, $5.0 million of issuance costs related to the August 2024 Offering, $0.5 million payment of deferred financing fees related to the 2024 ATM, $0.1 million of our credit facility issuance costs and $0.1 million of withholding taxes paid on vested RSUs.

Contractual Obligations and Contingencies

We enter into research, development and license agreements in the ordinary course of business where we receive research services and rights to proprietary technologies. Milestone and royalty payments that may become due under various agreements are dependent on, among other factors, clinical trials, regulatory approvals and ultimately the successful development of a new drug, the outcome and timing of which is uncertain.

We periodically enter into research and license agreements with third parties that include indemnification provisions customary in the industry. These indemnities generally require us to compensate the other party for certain damages and costs incurred as a result of claims arising from research and development activities undertaken by us or on our behalf. In some cases, the maximum potential amount of future payments that could be required under these indemnification provisions could be unlimited. These indemnification provisions generally survive termination of the underlying agreement. The nature of the indemnification obligations prevents us from making a reasonable estimate of the maximum potential amount we could be required to pay. Historically, we have not made any indemnification payments under such agreements and no amount has been accrued in our financial statements with respect to these indemnification obligations.

Critical Accounting Policies and Estimates

Management’s discussion and analysis of our financial condition and results of operations is based on our consolidated financial statements, which have been prepared in accordance with U.S. GAAP. The preparation of these consolidated financial statements requires us to make estimates and assumptions for the reported amounts of assets, liabilities, expenses and related disclosures. Our estimates are based on our historical experience and on various other factors that we believe are reasonable under the circumstances, the results of which form the basis for making judgments about the carrying value of assets and liabilities that are not readily apparent from other sources. Actual results may differ from these estimates under different assumptions or conditions and any such differences may be material.

While our significant accounting policies are described in more detail in the notes to our consolidated financial statements appearing elsewhere in this Annual Report, we believe the following accounting policies are the most critical for fully understanding and evaluating our financial condition and results of operations.

Fair Value Measurements

Certain of our assets and liabilities are carried at fair value under U.S. GAAP. Fair value is defined as the exchange price that would be received for an asset or paid to transfer a liability (an exit price) in the principal or most advantageous market for the asset or liability in an orderly transaction between market participants on the measurement date. Valuation techniques used to measure fair value must maximize the use of observable inputs and minimize the use of unobservable inputs. Financial assets and liabilities carried at fair value are to be classified and disclosed in one of the following three levels of the fair value hierarchy, of which the first two are considered observable and the last is considered unobservable:

The Amended Loan Agreement bears variable interest rates, and the carrying amount of the Amended Loan Agreement approximates fair value because interest rates approximate the current rates available to us.

The 2022 USD Financing Warrants (as defined in Note 8 in the notes to our annual financial statements) are liability classified due to not meeting the criteria for equity treatment under the guidance in ASC 815-40. Accordingly, the 2022 USD Financing Warrants were recognized at fair value upon issuance and are remeasured to fair value at the end of each reporting period. Any change in fair value is recognized in general and administrative expense on the consolidated statements of operations. Issuance costs related to warrants were expensed within general and administrative expense on the consolidated statements of operations.

Accrued Clinical Trial Costs and Other Research and Development Expenses

As part of the process of preparing our financial statements, we are required to estimate our accrued clinical trial costs and other research and development expenses as of each balance sheet date. This process involves reviewing open contracts and purchase orders, communicating with our personnel to identify services that have been performed on our behalf and estimating the level of service performed and the associated cost incurred for the service when we have not yet been invoiced or otherwise notified of actual costs. The majority of our service providers invoice us in arrears for services performed, based on a pre-determined schedule or when contractual milestones are met, but some require advance payments. We make estimates of our accrued expenses as of each balance sheet date in the financial statements based on facts and circumstances known to us at that time. If timelines or contracts are modified based upon changes in the protocol or scope of work to be performed, we modify our estimates and accruals accordingly on a prospective basis.

We base our expenses related to external clinical trial costs and other research and development services on our estimates of the services received and efforts expended pursuant to quotes and contracts with vendors that conduct research and development on our behalf. The financial terms of these agreements are subject to negotiation, vary from contract to contract and may result in uneven payment flows. There may be instances in which payments made to our vendors will exceed the level of services provided and result in a prepayment of the expense. In accruing service fees, we estimate the time period over which services will be performed and the level of effort to be expended in each period. If the actual timing of the performance of services or the level of effort varies from the estimate, we adjust the accrual or the amount of prepaid expenses accordingly.

Although we do not expect our estimates to be materially different from amounts actually incurred, our understanding of the status and timing of services performed relative to the actual status and timing of services performed may vary and may result in reporting amounts that are too high or too low in any particular period. To date, there have not been any material differences between our estimates of such expenses and the amounts actually incurred.

As of December 31, 2025, a hypothetical 10.0 percent increase in our liability for accrued clinical trial costs and research and development expenses would have resulted in an increase to our net loss of approximately $1.0 million.

Share-Based Payments

When equity-settled share payments are awarded to management, employees and consultants, the fair value of the equity instruments at the date of grant is charged to the consolidated statements of operations and comprehensive loss over the vesting period. When the terms and conditions are modified before they vest, any increase in the fair value of the shares, measured immediately before and after the modification, is also charged to the consolidated statements of operations and comprehensive loss.

We recognize stock-based compensation expense for stock options on a straight-line basis over the requisite service period and account for forfeitures as they occur. Our stock-based compensation costs are based upon the grant date fair value of options estimated using the Black-Scholes option pricing model.

This model utilizes inputs which are highly subjective assumptions and generally require significant judgment. These assumptions include:

Fair value of common shares— The fair value of our common shares is determined based upon the closing price of our common shares one day prior to grant.

Expected volatility—Due to our limited operating history and a lack of company-specific historical and implied volatility data, we have based our estimate of expected volatility on the historical volatility of a group of similar companies that are publicly traded. The peer group was developed based on companies in the biotechnology industry. We will continue to apply this process until a sufficient amount of historical information regarding the volatility of our own stock price becomes available.

Risk-free interest rate—The risk-free rate assumption is based on the U.S. Treasury instruments with maturities similar to the expected term of our stock options.

Expected life—The expected term represents the period that the stock-based awards are expected to be outstanding. We have opted to use the “simplified method” for estimating the expected term of options, whereby the expected term equals the arithmetic average of the vesting term and the original contractual term of the option, which is generally between 5 to 10 years.

Dividend yield—We base the expected dividend yield assumption on the fact that we have never paid cash dividends and have no present intention to pay cash dividends and, therefore, used an expected dividend yield of zero.

Recent Accounting Pronouncements

See Note 2—Summary of Significant Accounting Policies to our consolidated financial statements included elsewhere in this Annual Report for information about recent accounting pronouncements, the timing of their adoption, and our assessment, to the extent we have made one yet, of their potential impact on our financial condition of results of operations.

Emerging Growth Company Status

We are an “emerging growth company,” as defined in the JOBS Act. Under the JOBS Act, emerging growth companies can delay adopting new or revised accounting standards issued subsequent to the enactment of the JOBS Act until such time as those standards apply to private companies.

We have elected to use this extended transition period to enable us to comply with new or revised accounting standards that have different effective dates for public and private companies until the earlier of the date we (i) are no longer an emerging growth company or (ii) affirmatively and irrevocably opt out of the extended transition period provided in the JOBS Act. As a result, our financial statements may not be comparable to companies that comply with new or revised accounting pronouncements as of public company effective dates.

Item 7A. Quantitative and Qualitative Disclosures About Market Risk.

As a "smaller reporting company" as defined by Item 10 of Regulation S-K, we are not required to provide the information required by this item.

Item 8. Financial Statements and Supplementary Data.

INDEX TO Consolidated FINANCIAL STATEMENTS

Report of Independent Registered Public Accounting Firm

To the Shareholders and Board of Directors
Definium Therapeutics, Inc.:

Basis for Opinion

These consolidated financial statements are the responsibility of the Company’s management. Our responsibility is to express an opinion on these consolidated financial statements based on our audits. We are a public accounting firm registered with the Public Company Accounting Oversight Board (United States) (PCAOB) and are required to be independent with respect to the Company in accordance with the U.S. federal securities laws and the applicable rules and regulations of the Securities and Exchange Commission and the PCAOB.

We conducted our audits in accordance with the standards of the PCAOB. Those standards require that we plan and perform the audit to obtain reasonable assurance about whether the consolidated financial statements are free of material misstatement, whether due to error or fraud. The Company is not required to have, nor were we engaged to perform, an audit of its internal control over financial reporting. As part of our audits, we are required to obtain an understanding of internal control over financial reporting but not for the purpose of expressing an opinion on the effectiveness of the Company’s internal control over financial reporting. Accordingly, we express no such opinion.

Our audits included performing procedures to assess the risks of material misstatement of the consolidated financial statements, whether due to error or fraud, and performing procedures that respond to those risks. Such procedures included examining, on a test basis, evidence regarding the amounts and disclosures in the consolidated financial statements. Our audits also included evaluating the accounting principles used and significant estimates made by management, as well as evaluating the overall presentation of the consolidated financial statements. We believe that our audits provide a reasonable basis for our opinion.

/s/ KPMG LLP

We have served as the Company’s auditor since 2022.

Definium Therapeutics, Inc.

Consolidated Balance Sheets