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OS Therapies Incorporated (OSTX) Risk Analysis
Risk Overview Q2, 2026
Source: the company's latest filing for the period ended Jun 30, 2026, filed Aug 14, 2026
Risk Change Over Time
- Share Price & Shareholder Rights - Risk 1Sales of a substantial number of shares of our common stock, including shares issued or issuable upon the conversion or exercise of our outstanding convertible or exercisable securities, could cause the market price of our common stock to decline.
The sale of a substantial number of shares of our common stock in the public market, or the perception that such sales may occur, could cause the market price of our common stock to decline. We had 46,125,825 shares of common stock outstanding as of August 12, 2026 (excluding any shares issuable upon the conversion or exercise, as applicable, of our outstanding Series A senior convertible preferred stock, Secured Notes, warrants or stock options). A substantial majority of the outstanding shares of our common stock are freely tradable without restriction or further registration under the Securities Act, unless such shares are owned or purchased by "affiliates" as that term is defined in Rule 144 under the Securities Act. In addition, as of August 12, 2026, there were outstanding (i) 392,500 shares of Series A senior convertible preferred stock, convertible into an aggregate of 1,401,786 shares of common stock, (ii) Secured Notes in the aggregate principal amount of $5,405,405.42, convertible at a conversion price of $2.05 per share, (iii) warrants to purchase up to an aggregate of 15,234,585 shares of common stock, (iv) pre-funded warrants to purchase up to an aggregate of 3,324,108 shares of common stock, and (v) stock options to purchase up to an aggregate of 8,422,500 shares of common stock, of which options to purchase 2,400,000 shares of common stock were then exercisable. The shares of our common stock issuable upon conversion or exercise, as applicable, of such securities may be immediately eligible for resale in the open market. Any such sales, or the perception that such sales could occur, could cause the market price of our common stock to decline and may make it more difficult for us to raise capital in the future.
Risk Highlights Q2, 2026
Risk Word Cloud
Risk Factors Full Breakdown - Total Risks 66
- Innovation / R&D - Risk 1A breakthrough therapy designation by the FDA for our current or future product candidate does not convey any advantage in, or shorten the duration of, the regulatory review or approval process, and it does not increase the likelihood that our current or future product candidates will receive marketing approval.
In May 2024, we submitted a request to the FDA for breakthrough therapy designation for OST-HER2, and we may seek a breakthrough therapy designation for some of our other current or future product candidates. A breakthrough therapy is defined as a drug that is intended, alone or in combination with one or more other drugs, to treat a serious or life-threatening disease or condition, and preliminary clinical evidence indicates that the drug may demonstrate substantial improvement over existing therapies on one or more clinically significant endpoints, such as substantial treatment effects observed early in clinical development. For drugs that have been designated as breakthrough therapies, interaction and communication between the FDA and the sponsor of the trial can help to identify the most efficient path for clinical development while minimizing the number of patients placed in ineffective control regimens. Drugs designated as breakthrough therapies by the FDA are also eligible for accelerated approval. Designation as a breakthrough therapy is within the discretion of the FDA. Accordingly, even if we believe that one of our current or future product candidates meets the criteria for designation as a breakthrough therapy, the FDA may disagree and instead determine not to make such designation. In any event, the receipt of a Breakthrough Therapy Designation for a product candidate does not convey any advantage in, or shorten the duration of, regulatory review or approval compared to drugs considered for approval under conventional FDA procedures and does not assure ultimate approval by the FDA. In addition, even if one or more of our current or future product candidates qualify as breakthrough therapies, the FDA may later decide that the drugs no longer meet the conditions for qualification.
- Innovation / R&D - Risk 2Our current or future product candidates may cause adverse or other undesirable side effects that could delay or prevent their regulatory approval, limit the commercial profile of an approved label, or result in significant negative consequences following marketing approval, if any.
Undesirable side effects caused by our current or future product candidates could cause us to interrupt, delay or halt preclinical studies or could cause us or regulatory authorities to interrupt, delay or halt clinical trials and could result in a more restrictive label or the delay or denial of regulatory approval by the FDA or other regulatory authorities. While we have initiated clinical trials for OST-HER2, and although there have been limited side effects with this therapy to date, it is likely that there may be adverse side effects associated with its use. Results of our trials could reveal a high and unacceptable severity and prevalence of these or other side effects. In such an event, 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 our current or future product candidates for any or all targeted indications. 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. Any of these occurrences may significantly harm our business, financial condition and prospects. Further, our current or future product candidates could cause undesirable side effects in clinical trials related to on-target toxicity, or exaggerated and adverse pharmacologic effects at the target of interest in the test system. If on-target toxicity is observed, or if our current or future product candidates have characteristics that are unexpected, we may need to abandon their development 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. In our industry, many compounds that initially showed promise in early stage testing for treating cancer have later been found to cause side effects that prevented further development of the compound. Clinical trials by their nature utilize a sample of the potential patient population. For example, the 41 patients in our Phase IIb trial of OST-HER2 may include a limited number of patients with side effects. With a limited number of patients and limited duration of exposure, rare and severe side effects of our current or future product candidates may only be uncovered with a significantly larger number of patients exposed to the product candidate. If our current or future product candidates are tested in large numbers of patients or if they receive marketing approval and we or others identify undesirable side effects caused by such current or future product candidates after such approval, a number of potentially significant negative consequences could result, including: - regulatory authorities may place a hold on an ongoing clinical trial or may refuse to allow a future clinical trial to be conducted;- regulatory authorities may withdraw or limit their approval of current or future product candidates;- we may or a regulatory authority might require that the product or products be recalled;- regulatory authorities may require the addition of labeling statements, such as a "boxed" warning or a contraindication;- we may be required to create a medication guide outlining the risks of such side effects for distribution to patients;- we may be required to change the way such current or future product candidates are distributed or administered, conduct additional clinical trials or change the labeling of the current or future product candidates;- regulatory authorities may require a REMS plan to mitigate risks, which could include medication guides, physician communication plans, or elements to assure safe use, such as restricted distribution methods, patient registries and other risk minimization tools;- we may be subject to regulatory investigations and government enforcement actions;- we may decide to remove such current or future product candidates from the marketplace; and - we could be sued and held liable for injury caused to individuals exposed to or taking our current or future product candidates. We believe that any of these events could prevent us from achieving or maintaining market acceptance of the affected current or future product candidates and could substantially increase the costs of commercializing our current or future product candidates, if approved, and significantly impact our ability to successfully commercialize our current or future product candidates and generate revenues.
- Innovation / R&D - Risk 3Delays or difficulties in enrolling patients in clinical trials could prevent or delay regulatory approval and increase development costs.
We may not be able to initiate or continue clinical trials for our current or future product candidates if we are unable to locate and enroll a sufficient number of eligible patients to participate in these trials as required by the FDA or similar regulatory authorities outside the United States. This challenge is particularly significant because we are focused on patients with rare Osteosarcoma, which has a relatively low prevalence, with an incident rate of approximately 1,000 individuals affected per year in the United States. Identifying patients who meet our eligibility criteria, including those with specific molecular or driver gene profiles, may be difficult and could lead to slower-than-expected enrollment. Some of our competitors have ongoing clinical trials for current or future product candidates that treat the same patient populations as our current or future product candidates, and patients who would otherwise be eligible for our clinical trials may instead enroll in clinical trials of our competitors' current or future product candidates. While we successfully enrolled 41 patients in our Phase IIb clinical trial of OST-HER2, patient enrollment in future trials may be slower or more limited due to the rarity of the disease, competition for patients from other clinical trials, or other factors outside our control, including: - the willingness of participants to enroll in our clinical trials and available support in our countries of interest;- the obtaining of informed consent from parents or guardians of pediatric patients which meet evolving regulatory requirements in the United States and other countries;- the severity of the disease under investigation;- the eligibility criteria for the clinical trial in question;- the availability of an appropriate screening test;- the perceived risks and benefits of the product candidate under study;- the efforts to facilitate timely enrollment in clinical trials;- the patient referral practices of physicians;- the ability to monitor patients adequately during and after treatment; and - the proximity and availability of clinical trial sites for prospective patients. Failure to enroll a sufficient number of patients in future trials could result in significant delays, increased development costs, or the need to suspend or abandon one or more clinical trials. Such delays may also impair our ability to seek participation in expedited regulatory programs, such as the FDA's priority review or fast track designations, and could materially impact the timing, cost, and success of regulatory approvals and commercialization.
- Innovation / R&D - Risk 4We may not be successful in our efforts to identify or discover additional product candidates or we may expend our limited resources to pursue a particular product candidate or indication and fail to capitalize on product candidates or indications that may be more profitable or for which there is a greater likelihood of success.
The success of our business depends primarily upon our ability to identify, develop and commercialize our product candidates. Although some of our current product candidates are in preclinical and clinical development, our scientific hypotheses may be incorrect or our research programs may fail to identify other potential product candidates for clinical development for a number of reasons. Our research methodologies may be unsuccessful in identifying potential product candidates, or our potential product candidates may be shown to have harmful side effects or may have other characteristics that may make the products unmarketable or unlikely to receive marketing approval. Because we have limited financial and management resources, we focus on a limited number of research programs and product candidates and are currently focused on our lead core product candidate OST-HER2 and our other core product candidate OST-tADC, both targeting the treatment of Osteosarcoma. As a result, we may forego or delay pursuit of opportunities with other current or future product candidates or for other indications that later prove to have greater commercial potential. Our resource allocation decisions may cause us to fail to capitalize on viable commercial drugs or profitable market opportunities. Our spending on current and future research and development programs and current or future product candidates for specific indications may not yield any commercially viable drugs. 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 future collaboration, licensing or other royalty arrangements in cases in which it would have been more advantageous for us to retain sole development and commercialization rights to such product candidate. If any of these events occur, we may be forced to abandon our development efforts for a program, which would have a material adverse effect on our business and could potentially cause us to cease operations. Research programs to identify new product candidates require substantial technical, financial and human resources. We may focus our efforts and resources on potential programs or current or future product candidates that ultimately prove to be unsuccessful.
- Innovation / R&D - Risk 5We may in the future conduct clinical trials for current or future product candidates outside the United States, and the FDA and comparable foreign regulatory authorities may not accept data from such trials.
We may in the future choose to conduct one or more clinical trials outside the United States, including in Europe. The acceptance of study data from clinical trials conducted outside the United States or another jurisdiction by the FDA or comparable foreign regulatory authority may be subject to certain conditions or may not be accepted at all. In cases where data from foreign clinical trials are intended to serve as the basis for marketing approval in the United States, the FDA will generally not approve the application on the basis of foreign data alone unless (i) the data are applicable to the United States population and United States medical practice and (ii) the trials were performed by clinical investigators of recognized competence and pursuant to GCP regulations. Additionally, the FDA's clinical trial requirements, including sufficient size of patient populations and statistical powering, must be met. Many foreign regulatory authorities have similar approval requirements. In addition, such foreign trials would be subject to the applicable doctrines or local laws of the foreign jurisdictions where the trials are conducted. There can be no assurance that the FDA or any comparable foreign regulatory authority will accept data from trials conducted outside of the United States or the applicable jurisdiction. If the FDA or any comparable foreign regulatory authority does not accept such data, it would result in the need for additional trials, which could be costly and time-consuming, and which may result in current or future product candidates that we may develop not receiving approval for commercialization in the applicable jurisdiction.
- Innovation / R&D - Risk 6Positive results from early preclinical studies and clinical trials of our current or future product candidates are not necessarily predictive of the results of later preclinical studies and clinical trials of our current or future product candidates. If we cannot replicate the positive results from our earlier preclinical studies and clinical trials of our current or future product candidates in our later preclinical studies and clinical trials, we may be unable to successfully develop, obtain regulatory approval for and commercialize our current or future product candidates.
Positive results from our preclinical studies of our current or future product candidates, and any positive results we may obtain from our early clinical trials of our current or future product candidates, may not necessarily be predictive of the results from required later preclinical studies and clinical trials. Similarly, even if we are able to complete our planned preclinical studies or clinical trials of our current or future product candidates according to our current development timeline, the positive results from our preclinical studies and clinical trials of our current or future product candidates may not be replicated in subsequent preclinical studies or clinical trial results. For example, our later-stage clinical trials could differ in significant ways from our Phase IIb clinical trial of OST-HER2, which could cause the outcome of these later-stage trials to differ from our earlier-stage clinical trials. For example, these differences may include changes to inclusion and exclusion criteria, final dosage formulation, efficacy endpoints and statistical design. 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 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 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. If we fail to produce positive results in our planned preclinical studies or clinical trials of any of our current or future product candidates, the development timeline and regulatory approval and commercialization prospects for our current or future product candidates, and, correspondingly, our business and financial prospects, would be materially adversely affected.
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