Whitehawk Therapeutics (3350) Risk Analysis

Following the FYARRO Divestiture, we do not have any approved products and our pipeline is comprised solely of preclinical and clinical assets. Going forward, our business and future operating results will be dependent on our ability to successfully advance, develop and obtain regulatory approval for and/or commercialize our current and future product candidates and discover or in-license additional preclinical or clinical assets. Our ability to generate product or other revenue, which we do not expect will occur for many years, if ever, will depend heavily on the successful development and eventual commercialization of our product candidates, which may never occur. Prior to initiating clinical trials of our product candidates, we need to complete IND-enabling studies and file an IND or similar application to the FDA or regulatory authorities in other jurisdictions. The FDA cleared our IND applications for HWK-007 and HWK-016 in the fourth quarter of 2025 and the first quarter of 2026, respectively, and we anticipate FDA clearance of our IND for HWK-206 in mid-2026 but we may not be able to receive such clearance on the timeline we expect. Moreover, we cannot be sure that submission of an IND will result in the FDA allowing further clinical trials to begin, or that, once begun, issues will not arise that result in the suspension or termination of clinical trials. Additionally, even if such regulatory authorities agree with the design and implementation of the clinical trials set forth in an IND, we cannot guarantee that such regulatory authorities will not change their requirements in the future. These considerations also apply to new clinical trials we may submit as amendments to existing INDs or to a new IND. Any failure to file INDs on the timelines we expect or to obtain regulatory clearance for our trials may prevent us from developing product candidates on a timely basis, if at all. A product candidate can unexpectedly fail at any stage of preclinical and clinical development. The historical failure rate for product candidates is high due to risks relating to safety, efficacy, clinical execution, changing standards of medical care and other unpredictable variables. The results from preclinical studies or early clinical trials of a product candidate may not be predictive of the results that will be obtained in later stage clinical trials of the product candidate. If we experience failures, setbacks or delays in our preclinical studies, clinical trials, manufacturing or regulatory efforts, our business may be materially harmed. The success of other product candidates we may develop will depend on many factors, including the following: - generating sufficient preclinical data to support the initiation of clinical trials;- obtaining regulatory permission to initiate clinical trials;- contracting with the necessary parties to conduct preclinical studies and clinical trials;- successful enrollment of patients in, and the completion of, clinical trials on a timely basis;- the timely manufacture of sufficient quantities of a product candidate for use in clinical trials; and - generating sufficient safety and efficacy data to warrant continued development and which are satisfactory to the FDA or any other regulatory authority for marketing approval. Even if we successfully advance any of the ADC Therapies or other product candidates into clinical development, their success will be subject to all of the clinical, regulatory and commercial risks described elsewhere in this "Risk Factors" section. Accordingly, we cannot assure you that we will ever be able to discover, develop, obtain regulatory approval of, commercialize or generate significant revenue from any product candidates.

Our ability to generate product sales depends on our ability, alone or with strategic collaboration partners, to obtain the regulatory and marketing approvals necessary to successfully complete discovery, development and eventual commercialization of one or more of the ADC Therapies or any future product candidates, and commercialize any such product candidates, if approved, in foreign jurisdictions. We do not anticipate generating revenue from product sales for the foreseeable future. Our ability to generate future revenue and achieve profitability depends significantly on our ability, or any current or future collaborator's ability, to achieve several objectives, including, but not limited to: - demonstrating the safety and efficacy of the ADC Therapies to the satisfaction of the FDA and obtaining regulatory approval for ADC Therapies and for any other product candidates that we may develop, if any, for which there is a commercial market;- launching and successfully commercializing the ADC Therapies or any other product candidates that we may develop following any regulatory approval, including the development of a commercial infrastructure, whether in-house or with one or more collaborators;- maintaining a commercially viable supply of, and manufacturing relationships with third parties that can provide adequate, in both amount and quality, products and services to support clinical development and meet the market demand for the ADC Therapies or any other product candidates that we may develop, if approved;- completing development activities successfully and on a timely basis;- our ability to complete IND application enabling studies and successfully submit INDs or IND supplements or comparable applications, which become effective without any objections by the FDA or comparable regulatory authorities before commencing a clinical trial for the ADC Therapies and any future product candidates;- establishing and maintaining relationships with contract research organizations ("CROs") and clinical sites for the future clinical development of the ADC Therapies and any other future product candidates that we may develop;- timely receipt of regulatory approvals from applicable regulatory authorities for any product candidates for which we successfully complete clinical development;- developing or contracting for an efficient and scalable manufacturing process for the ADC Therapies and any future product candidates, including obtaining finished products that are appropriately packaged for sale;- following regulatory approval, negotiating and maintaining an adequate price for the ADC Therapies or any future product candidates, both in the United States and in foreign countries where our products are commercialized;- a continued acceptable safety profile following any regulatory approval of product candidates;- commercial acceptance of product candidates by patients, the medical community and third-party payors;- obtaining coverage and adequate reimbursement by third-party payors for any product candidates;- satisfying any required post-regulatory approval commitments to applicable regulatory authorities; identifying, assessing and developing new product candidates;- obtaining, maintaining and expanding patent protection, trade secret protection and regulatory exclusivity, both in the United States and internationally;- protecting our rights in our intellectual property portfolio;- defending against third-party interference or infringement claims, if any;- entering into and maintaining, on favorable terms, any collaboration, licensing or other arrangements that may be necessary or desirable to develop, manufacture or commercialize the ADC Therapies and any future product candidates; and - addressing any competing therapies and technological and market developments and attracting, hiring and retaining qualified personnel. 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 our value and could impair our ability to maintain or further our research and development efforts, raise additional necessary capital, grow our business or continue our operations and could cause a decline in the value of our common stock.

Our product candidates are next-generation ADCs using the same linker-payload designed by Hangzhou DAC and new antibodies designed by WuXi Biologics. Though ADC-based product candidates have been or are currently being evaluated by others in clinical trials using similar targets or the same linker-payload architectures, our product candidates and their antibody components have never been evaluated in human clinical trials prior to our Phase 1 studies of HWK-007 and HWK-016 that commenced in the first quarter of 2026. If our product candidates encounter safety or efficacy problems, developmental delays or regulatory issues or other problems, such problems could impact the development plans for our other product candidates because all of our product candidates currently use the same linker-payload architecture. Additionally, if ADCs being developed by other third parties that use the same linker-payload as our product candidates encounter safety or efficacy problems, our product candidates may face challenges from a development, regulatory or commercialization perspective. Lack of efficacy, adverse events, undesirable side effects or other adverse results may emerge in clinical trials conducted by third parties investigating a similar product candidate or product candidates using the same or similar linkers, payloads or antibodies. Those adverse results can adversely affect the development, approval and commercialization of our product candidates. Additionally, WuXi Biologics and Hangzhou DAC may enter into other licenses or collaboration partners that allow more third parties to develop and commercialize product candidates with the same or similar components, thereby increasing these risks. Lastly, the linker payloads may use highly potent cytotoxins and payloads that require special manufacturing and handling, which can pose additional risks.

Before obtaining regulatory approval from the FDA, EMA or other foreign regulatory authorities for the sale of product candidates that we may develop, we, among other requirements, may need to complete preclinical development and extensive clinical trials to demonstrate with substantial evidence the safety and efficacy of such product candidates. Each product candidate must demonstrate an adequate risk versus benefit profile in our intended patient population and for our intended use. Drug product must also be manufactured and tested in accordance with regional regulatory requirements which may differ from region to region. Clinical testing is expensive, difficult to design and implement, can take many years to complete and its ultimate outcome is inherently uncertain. A failure of one or more preclinical studies or clinical trials can occur at any stage of the process. The outcome of preclinical studies and early-stage clinical trials may not be predictive of the success of later clinical trials. In addition, initial success in clinical trials may not be indicative of results obtained when such trials are completed. Moreover, preclinical and clinical data are often susceptible to varying interpretations and analyses, and many companies in the biopharmaceutical industry that have believed their product candidates performed satisfactorily in preclinical studies and clinical trials have nonetheless failed to obtain regulatory approval of their products. Our current or future clinical trials may not ultimately be successful or support further clinical development of the ADC Therapies or any other product candidates we may develop. We may experience numerous unforeseen events during, or as a result of, clinical trials that could delay or prevent our ability to receive regulatory approval or our ability to commercialize any product candidates we may develop, including: - receipt of feedback from regulatory authorities that require us to modify the design of our clinical trials;- negative or inconclusive clinical trial results that may require us to conduct additional clinical trials or abandon certain drug development programs;- the number of patients required for clinical trials being larger than anticipated, enrollment in these clinical trials being slower than anticipated or participants dropping out of these clinical trials at a higher rate than anticipated;- clinical trial sites or our CRO failing to comply with regulatory requirements or meet their contractual obligations to us in a timely manner, or at all;- the suspension or termination of our clinical trials for various reasons, including non-compliance with regulatory requirements or a finding that our product candidates have undesirable side effects or other unexpected characteristics;- the cost of clinical trials of our product candidates being greater than anticipated;- the supply or quality of our product candidates or other materials necessary to conduct clinical trials of our product candidates being insufficient or inadequate; and - delays due to health epidemics, such as the COVID-19 pandemic, including starting any clinical trials for other indications or programs. For example, we initiated our PRECISION1 Phase 2 study of FYARRO in malignant solid tumors harboring TSC1 and TSC2 inactivating alterations based on exploratory data from our completed Phase 2 registrational study, Advanced Malignant PEComa Trial ("AMPECT trial"), and data for FYARRO in other solid tumors with TSC1 and TSC2 inactivating alterations. In August 2024, we had to halt, and subsequently wind-down, the PRECISION1 trial based on interim data and the related analysis by the Independent Data Monitoring Committee, which determined that the study was unlikely to exceed an efficacy threshold necessary to support an accelerated approval, the key goal of the study. Product candidates in later-stage clinical trials may fail to demonstrate sufficient safety and efficacy to the satisfaction of the FDA, EMA, and other comparable foreign regulatory authorities despite having progressed through preclinical studies and early-stage clinical trials. Additionally, we are aware of several other approved and clinical-stage antibody drug conjugates products being developed by multiple other companies, and, as such, the development of the ADC Therapies and our stock price may be impacted by inferences, whether correct or not, that are drawn between the success of our product candidates and those of other companies' antibody drug conjugates products. Regulatory authorities may also limit the scope of later-stage trials until we have demonstrated satisfactory safety and efficacy results, which could delay regulatory approval, limit the size of the patient population to which we may market our product candidates, or prevent regulatory approval. In some instances, there can be significant variability in safety and efficacy results between different clinical trials of the same product candidate due to numerous factors, including changes in trial protocols, differences in size and type of the patient populations, differences in and adherence to the dose and dosing regimen and other trial protocols and the rate of dropout among clinical trial participants. Patients treated with our products in clinical trials may have received surgical, radiation and chemotherapy treatments and/or may be using other approved products or investigational new drugs, which can cause side effects or adverse events that are unrelated to our products. As a result, assessments of efficacy can vary widely for a particular patient, and from patient to patient and site to site within a clinical trial. This subjectivity can increase the uncertainty of, and adversely impact, our clinical trial outcomes. We do not know whether any clinical trials we may conduct will demonstrate consistent or adequate efficacy and safety sufficient to obtain approval to market any product candidates we may develop. If we are required to conduct additional clinical trials or other testing of any future product candidates beyond those that we currently contemplate, if we are unable to successfully complete clinical trials of any product candidates or other testing in a timely manner, if the results of these trials or tests are not positive or are only modestly positive or if there are safety concerns, we may (i) incur unplanned costs, (ii) be delayed in seeking and obtaining regulatory approval for respective indications, if we receive such approval at all, (iii) receive more limited or restrictive regulatory approval for respective indications, (iv) be subject to additional post-marketing testing requirements or (v) have the drug removed from the market after obtaining regulatory approval. Even if regulatory approval is secured for any of our product candidates, the terms of such approval may limit the scope and use any product candidates, which may also limit their commercial potential.

If any product candidates that we may develop is associated with serious adverse events or other undesirable side effects or have unexpected characteristics in preclinical studies or clinical trials when used alone or in combination with other approved products or investigational new drugs, we may need to conduct additional studies to further evaluate their safety, interrupt, delay or abandon their development or halt clinical trials or limit development to more narrow uses or subpopulations in which the undesirable side effects or other characteristics are less prevalent, less severe or more acceptable from a risk-benefit perspective. Treatment-related side effects could also affect patient recruitment or the ability of enrolled subjects to complete the trial or result in a more restrictive label, delay or denial of regulatory approval or potential product liability claims. Any of these occurrences may prevent us from achieving or maintaining market acceptance of any affected product candidate, could substantially increase the costs of commercializing our product(s), and significantly impact our ability to successfully commercialize any product candidates that we may develop, if approved, and generate revenues, and may harm our business, financial condition and prospects significantly. Any product candidates may be used in populations for which safety concerns may be particularly scrutinized by regulatory agencies. Patients treated with product candidates that we may develop may also be undergoing surgical, radiation and/or chemotherapy treatments, which can cause side effects or adverse events that are unrelated to the product candidates but may still impact the success of our clinical trials. The inclusion of critically ill patients in our clinical trials may result in deaths or other adverse medical events due to other therapies or medications that such patients may be using or due to the gravity of such patients' illnesses. If further significant adverse events or other side effects are observed in any of our clinical trials, we may have difficulty recruiting patients to the clinical trials, patients may drop out of our trials, or we may be required to abandon the trials or our development efforts of that product candidate altogether. We, the FDA, EMA, other comparable regulatory authorities or an institutional review board may suspend or terminate clinical research at any time for various reasons, including noncompliance with regulatory requirements or a finding that the participants are being exposed to unacceptable health risks or adverse side effects. Some potential therapeutics developed in the biotechnology industry that initially showed therapeutic promise in early-stage trials have later been found to cause side effects that prevented their further development. Even if the side effects do not preclude the product candidate from obtaining or maintaining regulatory approval, undesirable side effects may inhibit market acceptance due to its tolerability versus other therapies. Any of these developments could materially harm our business, financial condition and prospects. Further, if any product candidate that we may develop obtains regulatory approval, toxicities associated with such product candidates and not seen during clinical testing may also develop after such approval and lead to a requirement to (i) conduct additional clinical safety trials, (ii) add additional contraindications, warnings and precautions to the drug label, (iii) significantly restrict the use of the product, (iv) change the way the product is distributed or administered, (v) implement a risk evaluation and mitigation strategy, or create a medication guide outlining the risks of such side effects for distribution to patients, or (vi) suspend or withdraw the product from the market. We cannot predict whether any product candidates that we may develop will cause toxicities in humans that would preclude or lead to the revocation of regulatory approval based on preclinical studies or early-stage clinical trials.

Any results from early preclinical studies and clinical trials of product candidates that we may develop may not necessarily be predictive of the results from later preclinical studies and clinical trials. Similarly, even if we are able to complete preclinical studies and clinical trials according to our current development timeline, the results from such preclinical studies and clinical trials may not be replicated in subsequent preclinical studies or clinical trial results. Many companies in the pharmaceutical and biotechnology industries have suffered significant setbacks in late-stage clinical trials after achieving positive results in early-stage development and we cannot be certain that we will not face similar setbacks. These setbacks have been caused by, among other things, preclinical and other nonclinical findings made while clinical trials were underway, or safety or efficacy observations made in preclinical studies and clinical trials, including previously unreported adverse events. Moreover, preclinical, nonclinical 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 or EMA approval.

Some of our future clinical trials may utilize an open-label study design and may be conducted at a limited number of clinical sites on a limited number of patients. An "open-label" clinical trial is one where both the patient and investigator know whether the patient is receiving the investigational product candidate or either an existing approved drug or placebo. Most typically, open-label clinical trials test only the investigational product candidate and sometimes may do so at different dose levels. Open-label clinical trials are subject to various limitations that may exaggerate any therapeutic effect as patients in open-label clinical trials are aware when they are receiving treatment. Open-label clinical trials may be subject to biases, including a "patient bias" where patients perceive their symptoms to have improved merely due to their awareness of receiving an experimental treatment. In addition, open-label clinical trials may be subject to an "investigator bias" where those assessing and reviewing the physiological outcomes of the clinical trials are aware of which patients have received treatment and may interpret the information of the treated group more favorably given this knowledge. The results from an open- label trial may not be predictive of future clinical trial results with any product candidates when studied in a controlled environment with a placebo or active control.

From time to time, we may publicly disclose preliminary, interim or topline data from our clinical trials. Preliminary data is based on a preliminary analysis of then available data, and the results and related findings and conclusions are subject to change following a more comprehensive review of the data related to the particular study or trial. For example, we may report tumor responses in certain patients that are unconfirmed at the time and which do not ultimately result in confirmed responses to treatment after follow-up evaluations. 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 and carefully evaluate all data. As a result, the topline results that we report may differ from future results of the same studies, or different conclusions or considerations may qualify such results, once additional data have been received and fully evaluated. Topline data also remain subject to audit, independent radiographic or clinical review, and verification procedures that may result in the final data being materially different from the preliminary data we previously published. As a result, topline data should be viewed with caution until the final data are available. In addition, we may report interim analyses of only certain endpoints rather than all endpoints. Interim data from clinical trials that we may complete are subject to the risk that one or more of the clinical outcomes may materially change as patient enrollment continues and more patient data become available. Adverse changes between interim data and final data could significantly harm our business and prospects. Further, additional disclosure of interim data by us or by our competitors in the future could result in volatility in the price of our common stock. In addition, the information we choose to publicly disclose regarding a particular clinical trial is typically selected from a more extensive amount of available information. 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 or our business. If the preliminary or topline data that we report differ from late, final or actual results, or if others, including regulatory authorities, disagree with the conclusions reached, our ability to obtain approval for, and commercialize, any product candidates that we may develop may be harmed, which could harm our business, financial condition, results of operations and prospects.

Lack of efficacy, adverse events, undesirable side effects or other adverse results may emerge in clinical trials conducted by third parties investigating our approved product or the same product candidates as us in different territories for the same or different indications. For example, we may in the future enter into collaborations for the development and commercialization of the ADC Therapies or other product candidates that we may develop in certain foreign jurisdictions. As part of these collaborations, we may grant such collaboration partners the right to develop and commercialize the same compounds licensed to us, including the ADC Therapies, in such foreign jurisdictions. As a result, we may not have control over clinical trials or development programs of such third parties that we may collaborate with in the future, and any adverse findings or unexpected side effects from such third party's conduct of clinical trials could adversely affect our development and commercialization of the ADC Therapies, if approved, or the viability of the ADC Therapies as a product candidate. We may be required to report these adverse events or unexpected side effects to the FDA or comparable foreign regulatory authorities, which could, among other things, order us to cease further development of the ADC Therapies.

We may not be able to initiate or continue clinical trials for the ADC Therapies or any future product candidates if we are unable to locate and enroll a sufficient number of eligible patients to participate in these trials to such trial's conclusion as required by the FDA, EMA or other comparable foreign regulatory authorities. Patient enrollment is a significant factor in the timing of clinical trials. Our ability to identify and enroll eligible patients for clinical trials may be limited or may result in slower enrollment than we anticipate. In particular, because we are focused on patients with specific genetic alterations for certain of our development programs, our ability to enroll eligible patients may be limited or may result in slower enrollment than anticipated. We may also engage third parties to develop companion diagnostics for use in our clinical trials, but such third parties may not be successful in developing such companion diagnostics, furthering the difficulty in identifying patients with the targeted genetic alterations for our clinical trials. If our strategies for patient identification prove unsuccessful, we may have difficulty enrolling or maintaining patients appropriate for the ADC Therapies or other product candidates. Patient enrollment may be affected if our competitors have ongoing clinical trials for product candidates that are under development for the same indications as the ADC Therapies or any future product candidates, and patients who would otherwise be eligible for our clinical trials instead enroll in clinical trials of our competitors' product candidates. Also, marketing authorization of competitors in this same class of drugs may impair our ability to enroll patients into our clinical trials, delaying or potentially preventing us from completing recruitment for one or more of our trials. Patient enrollment and retention for clinical trials may be affected by other factors, including: - size and nature of the patient population;- severity of the disease under investigation;- availability and efficacy of approved drugs for the disease under investigation;- patient eligibility criteria for the trial in question as defined in the protocol or as mandated by regulatory agencies;- perceived risks and benefits of the product candidate under study;- clinicians' and patients' perceptions as to the potential advantages and side effects of the product candidate being studied in relation to other available therapies and product candidates, including any new products that may be approved or other product candidates being investigated for the indications we are investigating;- the ability to recruit clinical study investigators with the appropriate competencies and experience;- clinicians' willingness to screen their patients for biomarkers to indicate which patients may be eligible for enrollment in our clinical trials;- patient referral practices of physicians;- the ability to obtain and maintain patient consents;- the ability to monitor patients adequately during and after treatment;- proximity and availability of clinical trial sites for prospective patients; and - factors we may not be able to control, such as current or potential pandemics that may limit patients, principal investigators or staff or clinical site availability (e.g., the COVID-19 pandemic). Our inability to enroll a sufficient number of patients for our clinical trials could result in significant delays or may require us to abandon one or more clinical trials altogether. Furthermore, any negative results we may report in clinical trials of the ADC Therapies or any future product candidates may make it difficult or impossible to recruit and retain patients in other clinical trials we are conducting. Similarly, negative results reported by our competitors about their ADC drug candidates may negatively affect patient recruitment in our clinical trials. Enrollment delays in our clinical trials may result in increased development costs for the ADC Therapies and any other product candidates that we may develop and jeopardize our ability to obtain regulatory approval for such product candidates. Furthermore, even if we are able to enroll a sufficient number of patients for our clinical trials, there is a risk that patients enrolled in clinical trials will drop out of the trials before completion or, because they may be late-stage cancer patients, may not survive the full terms of the clinical trials. As a result, we may have difficulty maintaining participation in our clinical trials through treatment and any follow-up periods. In addition, we rely on clinical trial sites to ensure timely conduct of our clinical trials and, while we have entered into agreements governing their services, we are limited in our ability to compel their actual performance.