Traws Pharma FY2025 Earnings Call - $60M PIPE Funds Summer Human Challenge Trial Despite FDA Clinical Hold
Summary
Traws Pharma closed a $60 million private financing to push its lead antiviral, Tivoxavir marboxil, into a U.K. human challenge study this summer, backed by a compressed-tablet formulation that shows a roughly 30 percent exposure boost in preclinical work and the promise of once-monthly prophylaxis. Management is prioritizing a prophylactic pathway for seasonal and pandemic influenza, with the hVIVO challenge trial and an Australian PK bridging study set to provide the near-term clinical signals investors are waiting for.
That momentum collides with a clear regulatory snag in the U.S. The FDA placed the companys IND on clinical hold over toxicology concerns, forcing Traws to rerun assays and engage regulators, and pushing the earliest U.S. advancement to late 2026. Cash on hand is thin, at $3.8 million, making the company dependent on the structured warrants in the new financing and milestone execution to fund operations into Q1 2027 if those warrants are fully exercised. The story now hinges on three items, regulatory answers, challenge trial readout, and whether the market backs future warrant exercises or forces dilution.
Key Takeaways
- Traws completed a private placement providing up to $60 million in potential gross proceeds, with $10 million upfront and milestone- and exercise-based warrants covering the remainder.
- The financing structure: Series A warrant ($10M exercise) vests on MHRA approval to run the U.K. challenge trial, Series B warrant ($10M) vests after shareholder approval plus challenge trial data, and Series C common warrant ($30M) is a 3-year instrument with an accelerated exercise if the stock trades at 2x the deal price for 30 consecutive days.
- Cash on hand was $3.8 million at year-end 2025, down from $21.3 million a year earlier, leaving the company reliant on the new financing and warrant exercises to fund operations.
- Company believes cash plus potential warrant proceeds, if fully exercised, is sufficient to support planned expenses into Q1 2027, a runway that is conditional and contingent on milestone execution and market behavior.
- Tivoxavir marboxil is positioned as a next-generation oral antiviral targeting the viral cap-dependent endonuclease, with management pitching once-monthly prophylaxis and potential inclusion in national pandemic stockpiles.
- Preclinical and Phase I signals: the new compressed tablet showed a roughly 30 percent increase in exposure in preclinical work, and first-generation phase I data showed plasma levels above EC90 for over three weeks with tolerability in healthy volunteers.
- Traws is running a phase I PK bridging study in Australia to confirm the tablet formulation's extended exposure, and plans a phase IIa seasonal influenza prophylaxis human challenge trial at hVIVO in the U.K. starting in June, subject to MHRA clearance.
- Regulatory risk: the FDA placed the companys IND on clinical hold due to toxicology concerns. Management plans to repeat assays, submit new data, and use Xofluza as a control, arguing structural similarity and prior negative Ames results support a clean mutagenicity profile.
- Timing risk: management targets resolving the FDA hold and advancing the U.S. program in late 2026, but that timeline depends on the scope of new toxicology work and FDA review times.
- Regulatory divergence is real, management notes. Australia has approved bridging/healthy volunteer studies with the same toxicology data that prompted the U.S. hold, and the MHRA review of the U.K. challenge trial dossier is on a 30-day clock but could reach a different conclusion than FDA.
- Commercial flexibility: management is not locked into once-monthly dosing, they will evaluate efficacy across weeks in the challenge trial and could pivot to more frequent dosing if that optimizes protection, though once-monthly remains the preferred commercial pitch.
- Financials were skewed by one-time items: revenue rose to $2.8 million from $226,000, driven partly by deferred revenue from a terminated oncology license; acquired in-process R&D expense dropped to zero from $117.5 million year over year; R&D expense was $12.1 million, G&A $8.5 million.
- The company reported net income of $9.2 million for 2025, reversing a $166.5 million loss a year earlier, a swing driven largely by the absence of the prior year acquisition-related charge and one-time items, not by recurring operating improvement.
- Execution and dilution risk sit front and center. With only $3.8 million cash, operating into the summer and through a challenge trial will depend on milestone vesting or warrant exercises, and the Series C warrant contains an accelerated forced-exercise feature tied to stock performance, which could compress dilution timing.
- Investor take: near-term binary catalysts are the MHRA decision to allow the June challenge trial and the outcome of the Australian bridging study. The FDA toxicology questions and need to rerun assays create an asymmetric downside that could push U.S. timelines and increase capital needs.
Full Transcript
Conference Operator: Gentlemen, thank you for standing by. At this time, all participants are in a listen-only mode. Following management’s prepared remarks, we will hold a question and answer session. To ask a question at that time, please press star followed by one on your touchtone phone. If anyone has difficulty hearing the conference, please press star zero for operator assistance. I would now like to turn the call over to LifeSci Advisors. Please.
John, IR Representative/Moderator, LifeSci Advisors: Thank you, operator, and welcome everyone to Traws Pharma’s full year 2025 financial results and business update conference call. This afternoon, Traws issued a press release reporting its 2025 financial results and provided a business update. If you have not yet seen this press release, it is available in the investor relations section of the company’s website. Following my introduction, we’ll hear from Traws Chief Executive Officer, Iain D. Dukes, and Chief Financial Officer, Charles Parker. Before we begin, I would like to remind everyone that statements made during this conference call will include forward-looking statements under the Safe Harbor Provisions of the Private Securities Litigation Reform Act of 1995, which involve risks and uncertainties that can cause actual results to differ materially. Forward-looking statements speak only as of the date they are made, as the underlying facts and circumstances may change.
Except as required by law, Traws disclaims any obligation to update these forward-looking statements to reflect future information, events, or circumstances. For more information on forward-looking statements, please review the disclaimer in this morning’s press release and the risk factors in the company’s SEC filings. With that, I will now turn the call over to Traws’s CEO, Dr. Iain D. Dukes.
Iain D. Dukes, Chief Executive Officer, Traws Pharma: Thanks, John, and thanks to everyone for joining us today. Over the last year, Traws has made substantial progress towards our objective of bringing our differentiated next generation antiviral candidate for influenza to patients. This morning, Traws announced a private financing of $60 million. The PIPE financing was supported by new and existing healthcare-focused investors. The capital from this financing positions Traws to advance the flu program through the human challenge study this summer, while providing access to additional capital as we achieve further key milestones. Influenza is estimated to be a multi-billion-dollar opportunity, spanning prophylactic and therapeutic applications, including strategic government stockpiling and pandemic preparedness incentives. The human challenge study trial focused on flu prevention is an important step towards establishing the potential for Tivoxavir marboxil as a potential best-in-class prophylactic agent for flu prevention.
We intend to initiate the study this summer once we have approval to proceed from the Medicines and Healthcare products Regulatory Agency, or MHRA, in the U.K. During today’s call, we’ll provide an overview of development of our lead candidate Tivoxavir marboxil, or Tivoxavir for short, for influenza. Tivoxavir marboxil is an exciting next generation investigational influenza antiviral that targets the highly conserved viral enzyme Cap-dependent endonuclease. We believe Tivoxavir is well-positioned to become a best-in-class once monthly oral prophylactic agent with additional potential for pandemic flu, including H5N1 bird flu. We will prioritize development of Tivoxavir as a once monthly prophylactic agent for influenza prevention. Seasonal influenza continues to have a severe public health impact in the U.S., particularly in vulnerable populations.
While there are approved therapies and vaccines for flu, with such a number of infections, hospitalizations, and deaths, there’s still an incredible unmet medical need for improved prophylactic agents and therapies for flu. We envisage Tivoxavir’s potential use in two settings. Prophylaxis, where it might be used on a monthly basis to prevent infection, especially during the flu season. Secondly, as an element of a national stockpile for pandemic preparedness. We believe Tivoxavir is well-suited to be a first-in-class prophylactic agent for seasonal flu based on its emerging profile as an oral once-a-month agent with a favorable tolerability profile and broad activity generally across influenza A and B strains. Cornerstone of our thesis for Tivoxavir anchors on three items. First, previously reported preclinical studies showed robust antiviral activity against a wide range of influenza strains, including all influenza A and B strains.
Second, positive preclinical data reported last year showed that a single dose of Tivoxavir provided protection against lethal bird flu challenge in three species, with significant reductions in lung virus burden and pathology in non-human primates. Third, phase I data in normal volunteer and healthy volunteers showed that the first generation powder and capsule formulation of Tivoxavir maintained plasma blood levels well above the EC90 for over three weeks with good overall safety. Coupled to this, we have developed a next generation compressed tablet formulation of Tivoxavir with an optimized pharmacokinetic profile. Data from preclinical studies show 30% increase in exposure with this new formulation. These results have given us confidence that the new tablet can provide 28-day coverage against influenza and be an effective once-a-month agent.
We are in the process of conducting a phase I bridge study in Australia to confirm the extended exposure we saw in preclinical studies. The positive bridging data will be shared with the MHRA in addition to the initial filings that we’ve already made with this agency, and hopefully this will be used to advance ourselves to the next step in our prophylaxis program, the phase IIa seasonal flu prophylaxis challenge trial. The challenge trial will be conducted at hVIVO in the U.K. starting in June. Positive results demonstrating protection from viral infection will be a landmark proof of concept for the program, supporting Tivoxavir’s unique value proposition as a safe and effective prophylactic agent. In the meantime, we continue to our conversations around Tivoxavir in terms of it being included in the national stockpile for pandemic preparedness.
To support our intention to secure formal consideration by the Biomedical Advanced Research and Development Authority, or BARDA, for inclusion in the U.S. strategic stockpile, we submitted our Investigational New Drug application, or IND, in January. FDA recently informed us that our IND filing has been placed on clinical hold due to concerns with the toxicology data package. We are actively engaging with the FDA to address its concerns and resolve the clinical hold as expeditiously as possible, with a goal of advancing the program in the U.S. in late 2026. We are optimistic about the ongoing bridging study and challenge study and look forward to reporting back on our progress through via. At this point, I am going to hand this over to Charles. Thank you. To provide a summary of the financial results.
Charles Parker, Chief Financial Officer, Traws Pharma: Thank you, Ian. This morning, Traws announced the completion of a private financing that provides up to $60 million in potential gross proceeds. We also issued a press release this afternoon covering our results for the year ended December 31, 2025. I’ll refer you to our recent 10-K filing for review of the full financial statements. You can also access the press release and the 10-K on our website. First, the recently completed financing. The private placement transaction includes funding of $10 million upfront and three warrants, which consist of a Series A milestone-based warrant with an aggregate exercise price of $10 million that becomes exercisable upon receipt of approval from MHRA to conduct the challenge trial. A Series B milestone-based warrant with an aggregate exercise price of $10 million that becomes exercisable following both shareholder approval and the announcement of data from the challenge trial.
A Series C common warrant with a 3-year term to purchase shares of our common stock and providing potential additional gross proceeds of $30 million if fully exercised following shareholder approval. Based on our current plans, the company believes that its current cash balance, including net proceeds from the offering in milestone-based warrants, if fully exercised, is sufficient to support planned expenses into Q1 2027. Turning to our financials. As of December 31, 2025, Traws had cash equivalents and short-term investments of approximately $3.8 million, compared to $21.3 million as of December 31, 2024. Revenue for the year ended December 31, 2025 was $2.8 million, compared to $226,000 for the same period in 2024.
The increase is attributable to $0.7 million in deferred revenue recognized as revenue in the second quarter related to the mutual termination of a licensing agreement associated with our legacy oncology program in April 2025. Acquired in-process research and development expense for the year ended December 31, 2025 was 0, compared to $117.5 million for the comparable period in 2024, recognized related to virology programs acquired in connection with the acquisition of Traws funded through a merger. Research and development expense for the year ended December 31, 2025 totaled $12.1 million, compared to $12.8 million for the comparable period in 2024. The decrease of $0.7 million primarily relates to a decrease in expenses related to the oncology program, partially offset by an increase in expenses related to the virology programs.
General and administrative expense for the year ended December 31, 2025 totaled $8.5 million, compared to $12.3 million for the comparable period in 2024. This decrease of $3.8 million is primarily attributable to a decrease in professional and consulting fees. The net income for the year ended December 31, 2025 was $9.2 million, or net income of $0.83 per basic common and $0.82 per diluted common share. This compares to a net loss of $166.5 million or a net loss of $35.21 per basic and diluted common share for the year ended December 31, 2024. Now I’d like to turn the call back to Ian.
Iain D. Dukes, Chief Executive Officer, Traws Pharma: Thanks, Charles. Before we open the line for questions, I’ll briefly summarize the topics we’ve covered on the call. Over the last year, Traws has made substantial progress towards our goal of advancing our differentiated next generation potential best-in-class antiviral candidate for influenza. The recent $60 million financing provides us with the resources to drive forward the planned seasonal influenza prophylaxis study for TXM and supports Traws’s future growth. For influenza, we are poised to advance the evaluation of Tivoxavir marboxil as a prophylactic agent, supported by completion of a bridging study for the compressed tablet formulation and initiation of a challenge trial in the U.K. this summer. As we begin the Q&A session, I want to thank everyone for joining us today. Now we’ll open up the call for questions. Operator, please go ahead.
Conference Operator: Also the line of Alethia Young with Cantor Fitzgerald. Please proceed.
Alethia Young, Analyst, Cantor Fitzgerald: Yes, hi, hopefully you can hear me. Thanks so much for taking the questions. Great. Wanted to just work through a few points of clarification here, if I could. Just first on the FDA’s questions, do you have a sense of what, if any, new experiments you might need to conduct to satisfy their questions on the toxicology data package? And also, based on sort of what we know from Xofluza, is there any plausible concern or risk around mutagenicity in the prophylaxis setting for Tivoxavir, just given it’s structurally similar? Or are you pretty confident that this can be fully resolved?
Iain D. Dukes, Chief Executive Officer, Traws Pharma: Thanks for your question. The structural similarity of Tivoxavir to Xofluza is an important point that you bring up, because Tivoxavir has a clean mutagenicity label, it was negative in Ames, and has shown no mutagenic potential since it’s been approved several years ago. We think this is very strong evidence that the data that was generated in our initial package of information submitted to the FDA could have some flaws associated with it. Our plan is actually to repeat some of these assays and submit new assays as well, and using Xofluza as an additional control in the assays that we submit to the FDA.
There’s no reason a priori why we should be any different to Xofluza, and so that gives us quite a lot of confidence that the in vitro data suggesting mutagenic risk are probably explainable through other mechanisms of action of the drug.
Alethia Young, Analyst, Cantor Fitzgerald: Okay, nice. Just on the U.K. side, was hoping you could just characterize if there’s any potential risk or what the various scenarios might be with the MHRA regarding starting that study on time in the summer with the prevailing toxicology data package, or if there could be any sort of delays or need for submission of additional data in the U.K.?
Iain D. Dukes, Chief Executive Officer, Traws Pharma: Yes, thanks for that. We can’t really answer that question today. Our package has been submitted to MHRA. They’re now under a 30-day clock to review the package that we have sent. It is frequently the case that these regulatory agents come to different conclusions based on identical toxicology packages submitted. For instance, in Australia, where the regulatory agency saw exactly the same data that was seen by the FDA, we were obviously allowed to proceed with the healthy volunteer studies now twice, because initially our studies were approved and moved forward. Again, HREC had access to exactly the same toxicology information that the FDA has today. Then secondly, when we recently got approved to run the bridging study in Australia, again, no concerns have been flagged. We remain hopeful and optimistic that the MHRA will indeed approve the study as submitted.
Alethia Young, Analyst, Cantor Fitzgerald: Okay, terrific. Just forecasting this out, thinking about sort of the value proposition for Tivoxavir in flu prevention.
Iain D. Dukes, Chief Executive Officer, Traws Pharma: Mm-hmm.
Alethia Young, Analyst, Cantor Fitzgerald: It sounds like, given the pharmacokinetic profile, like once monthly is possible here, but, once you do the challenge study and you have the data in hand, if it turns out that twice monthly or even once weekly sort of optimizes efficacy, do you think that’s just as viable commercially and something you would contemplate testing in a subsequent study, or are you sort of committed to a once monthly prophylaxis regimen here, just from a commercial adoption and sort of competitive standpoint?
Iain D. Dukes, Chief Executive Officer, Traws Pharma: No, not at all. We’ve done some initial market research on this point, and to your point, once weekly could still be a very attractive formulation for an oral compared to an injectable. We will obviously very carefully evaluate the results from a challenge study, and we will be assessing the degree of protection at 1 week, 2 week, 3 week, as well as 4 weeks in the study. We’ll make a decision based on what we see in terms of how we want to proceed forward into a phase 2b/3 in terms of the optimal dosing frequency that we would adopt.
Alethia Young, Analyst, Cantor Fitzgerald: Okay, thank you. Last question from me, just quick clarification on the final $30 million tranche of the financing announced today. Is there any event that triggers that or is that sort of at your request for shareholder approval, you can access that capital within that 3-year window? Thanks so much.
Iain D. Dukes, Chief Executive Officer, Traws Pharma: Yeah.
Charles Parker, Chief Financial Officer, Traws Pharma: I’ll handle that one.
Iain D. Dukes, Chief Executive Officer, Traws Pharma: Charles, can you take that please?
Charles Parker, Chief Financial Officer, Traws Pharma: Yep. Yes. Thanks for the question. The final warrant C, 30 million, has an accelerated feature. If our stock trades at 2x the deal price, which was $1.67 for 30 days consecutively, there’ll be a 10-day window to force exercise that warrant. That is the accelerated feature within the warrant, otherwise, it’s a 3-year term.
Alethia Young, Analyst, Cantor Fitzgerald: Perfect. Thanks so much.
Charles Parker, Chief Financial Officer, Traws Pharma: Mm-hmm.
Iain D. Dukes, Chief Executive Officer, Traws Pharma: Thank you.
Conference Operator: I’m showing no further questions in the queue. Ladies and gentlemen, thank you for your participation on today’s conference call. This concludes today’s event. You may now disconnect.