enGene Holdings (ENGN) Risk Analysis

An important element of our strategy is utilizing our genetic medicine platform to generate multiple product candidates. Although we intend to develop numerous product candidates targeting various cell types and indications and carrying different biologically active drug molecules, in addition to detalimogene, we may fail to identify viable new product candidates for clinical development for a number of reasons. For example, while we believe our genetic therapy platform is capable of transfecting many different tissue types with varied genetic cargos, such as nucleic acid therapeutics (e.g., DNA), antisense oligonucleotides, siRNA, miRNA, mRNA, genetic medicine and gene editing mechanisms, we have not yet successfully advanced any proprietary enGene-developed drug candidate incorporating these cargoes into clinical trials beyond detalimogene, and we may not be successful in developing products to effectively employ these types of cargoes or molecules. If we fail to identify additional potential product candidates, our business could be materially harmed. Research programs to pursue the development of our product candidates and using our genetic medicine platform to design and identify new product candidates and disease targets require substantial technical, financial and human resources whether or not they are ultimately successful. Our genetic medicine platform and research programs may initially show promise in identifying potential indications and/or product candidates, yet fail to yield results for clinical development for a number of reasons, including: - the research methodology used may not be successful in identifying potential indications and/or product candidates;- potential product candidates may, after further study, be shown to have harmful adverse effects or other characteristics that indicate they are unlikely to be effective drugs, or that make the product candidates impracticable to manufacture, unmarketable or unlikely to receive marketing approval; or - it may take greater human and financial resources than we will possess to identify additional therapeutic opportunities for our product candidates or to develop suitable potential product candidates through internal research programs, thereby limiting our ability to develop, diversify and expand our product portfolio. If any of these events occur, we may be forced to abandon our research or development efforts for a program or programs, which would have a material adverse effect on our business, financial condition, results of operations and prospects. Accordingly, there can be no assurance that we will ever be able to identify additional therapeutic opportunities for our product candidates or to develop suitable potential product candidates through internal research programs, which could materially adversely affect our future growth and prospects. We may focus our efforts and resources on potential product candidates or other potential programs that ultimately prove to be unsuccessful, which would be costly and time-consuming.

We expect to evaluate the possibility of establishing our own capabilities and infrastructure, including a manufacturing facility. If we choose to build our own manufacturing facility, we will need significant funding and will need to select an adequate location. We expect that development of our own manufacturing facility would provide us with enhanced control of material supply for both clinical trials and the commercial market, enable the more rapid implementation of process changes, and allow for better long-term margins. However, we have no experience in developing a manufacturing facility and may never be successful in developing our own manufacturing facility or capability. If we determine to establish our own manufacturing capabilities and infrastructure, we will also need to hire additional personnel to manage our operations and facilities and develop the necessary infrastructure to continue the research and development, and eventual commercialization, if approved, of our product candidates. If we fail to select the correct location, complete the construction in an efficient manner, recruit the required personnel and generally manage our growth effectively, the development and production of our product candidates could be curtailed or delayed. We may establish multiple manufacturing facilities as we expand our commercial footprint to multiple geographies, which may lead to regulatory delays or could prove costly. Even if we are successful, any manufacturing capabilities we develop could be affected by cost-overruns, unexpected delays, equipment failures, labor shortages, natural disasters, power failures and numerous other factors that could prevent us from realizing the intended benefits of our manufacturing strategy and have a material adverse effect on our business, financial condition, results of operations and prospects.

If the FDA determines that a product candidate offers a treatment for a serious condition and, if approved, the product would provide a significant improvement in safety or effectiveness of the treatment, the FDA may designate the marketing application for that product candidate for priority review. A priority review designation is intended to direct overall attention and resources to the evaluation of such applications and to shorten the goal for the FDA to review an application to six months, rather than the standard review period of ten months. We may request priority review for one or more original BLAs for detalimogene or any other product candidates that we may develop s in the future. The FDA has broad discretion with respect to whether or not to grant priority review status to a marketing application, so even if we believe an application for a particular product candidate is eligible for such designation or status, the FDA may decide not to grant it. Moreover, a priority review designation does not necessarily result in expedited regulatory review or approval process or necessarily confer any advantage with respect to approval compared to conventional FDA procedures. Receiving priority review from the FDA does not guarantee approval within the six-month review cycle, or at all. Many product candidates that have received priority review designation have ultimately failed to obtain approval.

We currently only have one product candidate, detalimogene, in clinical development. We invested and continue to invest a significant portion of our efforts and financial resources in the research and development of detalimogene. Our ability to generate revenues from the sale of drugs that treat bladder cancer and other diseases in humans, which may not occur for several years, if ever, will depend heavily on the successful clinical development, regulatory approval for, and eventual commercialization of detalimogene. This may make an investment in our Company riskier than similar companies that have multiple product candidates in active development and may be able to better sustain the delay or failure of a lead product candidate. The success of detalimogene will depend on several factors, including: - successful initiation and enrollment of clinical trials and completion of clinical trials with favorable results;- acceptance of regulatory submissions by the FDA or comparable foreign regulatory authorities for the conduct of clinical trials of detalimogene and of our proposed designs of planned clinical trials of detalimogene, including protocol amendments or other changes we may make to ongoing clinical trials;- the frequency and severity of adverse events observed in clinical trials and preclinical studies;- maintaining and establishing relationships with CROs and clinical sites for the clinical development of detalimogene, and the ability of such CROs and clinical sites to comply with clinical trial protocols, GCPs and other applicable requirements;- demonstrating the safety, purity and potency (or efficacy) of detalimogene to the satisfaction of applicable regulatory authorities, including by establishing a safety database of a size satisfactory to regulatory authorities;- receipt and maintenance of regulatory approvals from applicable regulatory authorities, including approvals of BLAs from the FDA;- maintaining relationships with our third-party CMOs and the CMOs' ability to comply with cGMPs as well as entering into agreements with our third-party CMOs for, or establishing our own, commercial manufacturing capabilities at a cost and scale sufficient to support commercialization;- establishing sales, marketing and distribution capabilities and launching commercial sales of detalimogene, if and when approved by the FDA, whether alone or in collaboration with others;- obtaining, maintaining, protecting and enforcing patent and any potential trade secret protection or regulatory exclusivity for detalimogene;- maintaining an acceptable safety profile of detalimogene following regulatory approval, if any;- maintaining and growing an organization of people who can develop and, if approved, commercialize, market and sell detalimogene; and - acceptance and coverage of our products, if approved, by patients, the medical community and federal healthcare programs and other third-party payors. If we are unable to develop, obtain regulatory approval for, or if approved, successfully manufacture and commercialize detalimogene, or if we experience delays as a result of any of the above factors or otherwise, our business would be materially harmed.

Biotechnology product development is expensive, takes years to complete, and has uncertain outcomes. Failure can occur at any stage of product development. In addition, if we determine that any of our current or future products or services are unlikely to succeed, we may abandon them without any return on our investment. We expect to incur significant expenses to advance our genetic medicine development efforts, which may be unsuccessful. Developing new product candidates, such as detalimogene, is a speculative, risky and highly competitive endeavor. Product candidates that initially show promise may fail to achieve the desired results in development and clinical studies and may ultimately not prove to be safe and effective or meet expectations for clinical utility. We may be unable to establish clinical endpoints that applicable regulatory authorities would consider clinically meaningful, and a clinical trial can fail at any stage of testing. We may need to alter our offerings in development and repeat clinical studies before we develop a potentially successful product. If, after development, a product appears successful, we will still need to obtain FDA and other regulatory approvals before we can market it. The FDA's approval pathways are likely to involve significant time, as well as additional research, development and clinical study expenditures. The FDA may not clear, authorize or approve any product we develop. Even if we develop a product that receives regulatory clearance, authorization or approval, we would need to commit substantial resources to commercialize, sell and market it before it could be profitable, and the product may never be commercially successful. Additionally, development of any product or service may be disrupted or made less viable by the development or announcement of competing products or services, which could occur at any time. Because of the numerous risks and uncertainties associated with developing product candidates, we are unable to predict whether or when our therapeutics business may successfully commercialize a product candidate.

Genetic medicine is an emerging field of product development with only a small number of genetic medicines having received FDA or EMA approval to date. Our genetic medicine research programs are still at an early stage, and there remain several areas of product development risk, which pose particular uncertainty for our programs given the relatively limited development history of, and our limited prior experience with, genetic medicines. Translational science, manufacturing materials and processes, safety concerns, regulatory pathway and clinical trial design and execution all pose particular risk to our product development activities. Furthermore, the medical community's understanding of the causes of many diseases continues to evolve and further research may change the medical community's views on what therapies and approaches are most effective for addressing certain diseases. As an organization, we have limited experience conducting IND-enabling studies or clinical trials, including later stage or pivotal clinical trials. In pursuing our new technologies, we have begun to establish our own genetic medicine technical capabilities, but we will need to continue to expand those capabilities by either hiring internally or seeking assistance from outside service providers. Genetic medicine is an area of significant investment by biotechnology and pharmaceutical companies and there may be a scarcity of talent available to us in these areas. If we are not able to expand our genetic medicine capabilities, we may not be able to develop in the way we intend or desire any promising product candidates that emerge from our program, including detalimogene, which would limit our prospects for future growth. We may require more time and incur greater costs than our competitors and may not succeed in obtaining regulatory approvals of detalimogene or other product candidates that we may develop. We may also rely on third-party vendors or service providers, including CROs, among others who may fail to meet their commitments to us or deliver their products to us. We may also be forced to rely on a single such provider with no redundancy or alternative. Failure to commence or complete, or delays in our clinical trials, could prevent us from or delay us in commercializing detalimogene or other product candidates that we may develop. Because we have limited financial and managerial resources, we focus on research programs and on genetic medicine technologies and product candidates that we identify for specific indications among many potential options, such as detalimogene in high-risk BCG-unresponsive NMBIC with CIS or other NMIBC indications. As a result, we may forego or delay pursuit of opportunities with other product candidates or for other indications that later prove to have greater commercial potential, or we may choose to focus our efforts and resources on a potential product candidate that ultimately proves to be unsuccessful. For example, in June 2024, we announced that, as a result of our prioritization of exploring potential bladder cancer indications for detalimogene, we deprioritized preclinical development of another product candidate, EG-i08 for cystic fibrosis. Our resource allocation decisions may cause us to fail to capitalize on viable commercial products or profitable market opportunities. Our spending on current and future research and development programs and product candidates for specific indications may not yield any commercially viable products. If we do not accurately evaluate the commercial potential or target market for a particular product candidate, we may relinquish valuable rights to that product candidate through collaboration, licensing or other arrangements in cases in which it would have been more advantageous for us to retain sole development and commercialization rights to such product candidate. Failure to pursue opportunities with greater commercial potential or relinquishing valuable rights to product candidates may have a material adverse effect on our business, financial condition, results of operations and prospects.

We have concentrated our research and development efforts on our genetic medicine platform, and our future success depends on the successful development and maintenance of our platform. However, the technologies that comprise our platform and detalimogene are new and largely unproven. These technologies have been neither extensively studied nor extensively clinically tested, and the scientific and clinical evidence to support the feasibility of developing product candidates based on those technologies in pursuit of regulatory approval and potential commercial viability and success may be considered preliminary and limited. Successful development of product candidates by us will require solving several issues, including proving the safety and efficacy of detalimogene for BCG-unresponsive NMIBC and expanding our mucosal tissue delivery system to treat patient tissues beyond the bladder, such as urogenital and gastrointestinal mucosal tissues. There can be no assurance we will be successful in solving any or all of these issues. We have concentrated our research efforts to date on developing the components of our genetic medicine platform, and our future success is highly dependent on the successful development of our proprietary carrier for genetic medicines to mucosal tissues, therapeutic applications of such technology and the advancement of additional programs focused on diseases of the urogenital and gastrointestinal mucosal tissues. We may decide to alter or abandon our initial programs as new data become available and we gain experience in developing our therapeutics. We cannot be sure that our technologies will yield satisfactory products that are safe and effective, scalable or profitable in any indication we pursue. There can be no assurance that any development problems we experience in the future related to our genetic medicine platform will not cause significant delays or unanticipated costs, or that such development problems can be solved. We may also experience delays in developing sustainable, reproducible and scalable manufacturing processes or transferring such processes to any commercial partners, which may prevent us from initiating or conducting clinical trials or commercializing our products on a timely or profitable basis, if at all. We may also fail to build redundancy in these manufacturing processes, such that we will be vulnerable to third-party provider failures that may impair the supply of or manufacture of critical materials, products, or reagents. In addition, the clinical trial requirements of the FDA, the EMA and other regulatory agencies and the criteria these regulators use to determine the safety and efficacy of a product candidate vary substantially according to the type, complexity, novelty and intended use and market of the potential products. The regulatory approval process for novel product candidates can be more expensive and take longer than for other, better known or extensively studied pharmaceutical or other product candidates. FDA's regulatory guidance documents, including those that may be applicable to our programs, may change, be cancelled or evolve. Only a small number of genetic medicines have successfully reached the clinical trial phase of development or beyond, limiting insight into the regulatory review process for this field of genetic medicine. As a result, it is difficult to determine how long it will take or how much it will cost to obtain regulatory approvals in either the United States or the European Union for any product candidates we may develop or how long it will take to commercialize any product candidate that receives marketing approval.

To obtain the requisite regulatory approvals to commercialize detalimogene or any other product candidate that we may develop, we must demonstrate through extensive preclinical studies and clinical trials that our products are safe and effective. Our product candidates are in preclinical development and clinical trial stages and thus their risk of failure is high. Before we can commence clinical trials for a product candidate, we must complete extensive preclinical studies that support our filed and planned INDs in the United States, or similar applications in other jurisdictions. We cannot be certain of the timely completion or outcome of our preclinical studies and cannot predict if the FDA or other regulatory authorities will accept our proposed clinical programs or if the outcome of our preclinical studies will ultimately support the further development of our product candidates. As a result, we cannot be sure that we will be able to submit INDs or similar applications for our preclinical programs on the timelines we expect, if at all, and we cannot be sure that submission of INDs or similar applications will result in the FDA or other regulatory authorities allowing clinical trials to begin. Before obtaining marketing approval from regulatory authorities for the sale of any product candidate, including detalimogene, we must conduct extensive clinical trials to demonstrate the safety and efficacy of any of these product candidates in humans. Clinical trials are expensive, difficult to design and implement, can take many years to complete, and their outcome is inherently uncertain. Failure can occur at any time during, or even after, the clinical trial process and our ongoing and future clinical results may not be successful. We may be unable to establish clinical endpoints that applicable regulatory authorities would consider clinically meaningful and a clinical trial can fail at any stage of testing. Similarly, if regulatory authorities agree, implicitly or explicitly, that a certain set of clinical endpoints is clinically meaningful or adequate to demonstrate safety and efficacy, they may change their determination at a later date. The outcome of preclinical studies and early clinical trials may not be predictive of the success of later clinical trials and interim or preliminary results of a clinical trial do not necessarily predict final results. Differences in trial design between early-stage clinical trials and later-stage clinical trials make it difficult to extrapolate the results of earlier clinical trials to later clinical trials. Moreover, preclinical and clinical data are often susceptible to varying interpretations and analyses and many companies that have believed their product candidates performed satisfactorily in preclinical studies and clinical trials have nonetheless failed to obtain marketing approval of their products. Successful completion of clinical trials is a prerequisite to submitting a BLA to the FDA and similar marketing applications to other regulatory authorities, for each product candidate and, consequently, the ultimate approval and commercial marketing of any product candidates. We do not know whether any of our clinical trials will be completed on schedule, if at all. We may experience delays in initiating or completing clinical trials and preclinical studies. We also may experience numerous unforeseen events during, or as a result of, any ongoing and future clinical trials that we conduct that could delay or prevent our ability to receive marketing approval or commercialize our product candidates, including that: - we may be unable to generate sufficient preclinical, toxicology, in vivo, in vitro, or other data to support the initiation of clinical trials;- we may experience delays in our discussions with the FDA and other regulatory authorities regarding trial design or other aspects of our trial and study;- regulators or IRBs, or ethics committees may not authorize us or our investigators to commence a clinical trial or conduct a clinical trial at a prospective trial site;- we may experience delays in reaching, or fail to reach, agreement on acceptable terms with prospective trial sites and prospective CROs, the terms of which can be subject to extensive negotiation and may vary significantly among different CROs and trial sites;- positive results from our preclinical studies of our product candidates may not necessarily be predictive of the results from required later preclinical studies and clinical trials and positive results from such preclinical studies and clinical trials of our product candidates may not be replicated in subsequent preclinical studies or clinical trial results;- clinical trials of any product candidates may fail to show safety or efficacy, or produce negative or inconclusive results and we may decide, or regulators may require us, to conduct additional preclinical studies or clinical trials or we may decide to abandon product development programs;- the number of patients required for clinical trials of any product candidates may be larger than we anticipate, enrollment in these clinical trials may be slower than we anticipate or participants may drop out of these clinical trials or fail to return for post-treatment follow-up at a higher rate than we anticipate;- the FDA or other regulatory authorities may require us to enroll more patients in clinical trials than we had planned, including if they determine that patients we have enrolled did not meet the eligibility criteria for the clinical trial or, in the case of detalimogene for BCG-unresponsive NMIBC with CIS, did not meet the requirements of the FDA's 2018 Guidance Document entitled "Bacillus Calmette-Guérin-Unresponsive Nonmuscle Invasive Bladder Cancer: Developing Drugs and Biologics for Treatment Guidance for Industry" (the "Guidance Document") and the FDA's August 2024 update in draft form of the Guidance Document;- we may need to add new or additional clinical trial sites; and - our third-party contractors may fail to comply with regulatory requirements or meet their contractual obligations to us in a timely manner, or at all, or may deviate from the clinical trial. We could also encounter delays if a clinical trial is suspended, placed on clinical hold or terminated by us, the IRBs of the institutions in which such trials are being conducted, or the FDA or other regulatory authorities or recommended for suspension or termination by the Data Safety Monitoring Board, for such trial. A suspension or termination may be imposed 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, failure to demonstrate a benefit from using a product or treatment, failure to establish or achieve clinically meaningful trial endpoints, changes in governmental regulations or administrative actions or lack of adequate funding to continue the clinical trial. 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. Further, the FDA or other regulatory authorities may disagree with our clinical trial design and our interpretation of data from clinical trials, or may change the requirements for approval even after they have reviewed and commented on the design for our clinical trials. Moreover, preclinical and clinical data are often susceptible to varying interpretations and analyses and many companies that believed their product candidates performed satisfactorily in preclinical studies and clinical trials nonetheless failed to obtain FDA approval. Our product development costs will increase if we experience delays in clinical testing or marketing approvals, which will correspondingly increase our operating costs. Our preclinical studies or clinical trials may not begin as planned, may need to be restructured or may not be completed on schedule, or at all. Significant preclinical studies or clinical trial delays also could shorten any periods during which we may have the exclusive right to commercialize our product candidates and may allow our competitors to bring products to market before we do, potentially impairing our ability to successfully commercialize our product candidates and harming our business and results of operations. Any delays in our preclinical or clinical development programs may harm our business, financial condition, results of operations and prospects.

From time to time, we may publish interim top-line or preliminary data from our clinical trials. Interim, topline and preliminary data from our clinical trials are subject to the risk that one or more of the clinical outcomes may materially change as participant enrollment continues, data is further analyzed, and more participant data become available. We also make assumptions, estimations, calculations, and conclusions as part of our analyses of data, and we may not have received or had the opportunity to fully evaluate all data. Preliminary, topline or interim results also remain subject to audit and verification procedures that may result in the final data being materially different from the data we have previously published. As a result, interim, topline and preliminary data should be expected to change as additional patient data become available and as such new data and/or existing data is audited and verified; all data should be viewed with caution until the final data and analyses are available. Adverse differences between preliminary, topline or interim data and final data could be material and could significantly harm our reputation and business prospects and may cause the trading price of our common shares to fluctuate significantly. In addition, others, including regulatory authorities, 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 (for example, detalimogene), the approvability or commercialization of the particular product candidate or product, and our Company in general. Moreover, the information we choose to publicly disclose regarding a particular study or clinical trial is based on what is typically extensive information, and you or others may not agree with what we determine is 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 drug, product candidate or our business. If the interim, topline or preliminary data that we report differ from actual results, or if others, including regulatory authorities, disagree with the conclusions we reached, our ability to obtain approval for, and commercialize detalimogene and any future product candidates we develop may be harmed, which could harm our business, financial condition, results of operations and prospects.

The timely completion of clinical trials in accordance with their protocols depends, among other things, on our ability to enroll a sufficient number of patients who remain in the trial until its conclusion. We have from time to time experienced and may in the future experience difficulties in patient enrollment in our clinical trials for a variety of reasons, including: - the availability of a sizeable population of eligible patients;- the proximity of patients to study sites;- the design of the trial;- our ability to recruit clinical trial investigators with the appropriate competencies and experience;- competing clinical trials for similar therapies or other new therapeutics;- clinicians' and patients' perceptions as to the potential advantages and side effects of our product candidate being studied in relation to other available therapies or surgical procedures;- our ability to obtain and maintain patient consents;- the failure of patients to complete a clinical trial;- the availability of approved therapies that are similar in mechanism to our product candidates;- the cost to, or lack of adequate compensation for, prospective patients; and - the risk that patients enrolled in clinical trials will not complete such trials for any reason, including due to health crises, including pandemics, geopolitical conflicts, acts of terrorism, and/or "acts of God" that affect our contract manufacturing organizations ("CMOs"), suppliers, clinical investigator sites and governing regulatory bodies. In addition, our clinical trials will compete with other clinical trials for product candidates that are in the same therapeutic areas as our product candidates, and this competition will reduce the number and types of patients available to us because some patients who might have opted to enroll in our trials may instead opt to enroll in a trial being conducted by one of our competitors. Because the number of qualified clinical investigators is limited, we may conduct some of our clinical trials at the same clinical trial sites that some of our competitors use, which would reduce the number of patients who are available for our clinical trials at such clinical trial sites. Even if we are able to enroll a sufficient number of patients in our clinical trials, delays in patient enrollment may result in increased costs or may affect the timing or outcome of the planned clinical trials, which could prevent completion of these trials and adversely affect our ability to advance the development of our product candidates.

We will need to successfully complete later-stage and pivotal clinical trials in order to obtain FDA or comparable foreign regulatory approval to market detalimogene or any future product candidates we develop. Carrying out pivotal and later-stage clinical trials and the submission of a successful BLA or other comparable foreign regulatory submission are complicated processes. As an organization, we have conducted the Phase 1 portion of the combined Phase 1/2, open-label study of detalimogene referred to as the "LEGEND" study and are conducting the Phase 2 multi-cohort portion of the LEGEND study consisting of three cohorts, including the pivotal cohort evaluating detalimogene in patients with BCG-unresponsive NMIBC with CIS. We have not yet completed any later-stage or pivotal clinical trials for detalimogene or any other product candidate. We also have limited experience as a company in preparing and submitting marketing applications and have not previously submitted a BLA or other comparable foreign regulatory submission for any product candidate. In addition, we have had limited interactions with the FDA and cannot be certain how many additional clinical trials of detalimogene or any other product candidates we develop will be required or how such additional trials should be designed. Consequently, we may be unable to successfully and efficiently execute and complete necessary clinical trials in a way that leads to submission of a BLA and regulatory approval of detalimogene or any of the other product candidates we develop. We may require more time and incur greater costs than our competitors and may not succeed in obtaining regulatory approvals of detalimogene or any of other product candidates we develop. Failure to commence or complete, or delays in, our ongoing or future clinical trials could prevent us from or delay us in submitting BLAs or other comparable foreign regulatory submissions for and commercializing detalimogene or any of other product candidates we develop.