Narazaciclib

Completed acquisition of Trawsfynydd and concurrent $14 million Capital Raise Excellent pipeline progress, led by candidates for COVID 19, influenza, and oncology programs Poised to initiate Phase 2 studies in H2 2024 for our influenza candidate and ritonavir-free COVID 19 protease inhibitor NEWTOWN, Pa., May 16, 2024 (GLOBE NEWSWIRE) -- Traws Pharma, Inc. (“Traws” or “Traws Pharma”), a clinical stage biopharmaceutical company developing oral small molecules for respiratory viral diseases and cancer, today announced financial results for the first quarter of 2024, and provided a business update. “2024 has already been a transformative year for Traws Pharma to advance our portfolio of novel treatments for serious respiratory infections and oncology programs. We completed the acquisition of Trawsfynydd and concluded a concurrent $14 million private placement financing. In addition, we initiated first-in-human dosing for our COVID 19 product candidate, including completion of the first cohort dosing group. Furthermore, we completed the last dose escalation cohort for our CDK4+ inhibitor, narazaciclib,” stated Werner Cautreels, Ph.D., Chief Executive Officer of Traws Pharma. “We believe that we are poised to make even more meaningful progress in the second half of 2024, as we advance our influenza treatment and ritonavir-free protease inhibitor for COVID 19 into expanded Phase 1 dose escalation studies and begin Phase 2 development.” “Based on the preclinical pro early clinical data from our infectious disease candidates and narazaciclib, I am optimistic about the outlook for Traws’ portfolio and look forward to updating our investors with our progress through the year,” concluded Dr. Cautreels. Traws Proprietary Portfolio Highlights: TRX100 (tivoxavir marboxil): a cap-dependent endonuclease inhibitor for influenza: Phase 1 Targets the cap-dependent endonuclease of influenza and is a potent inhibitor of influenza virus replication including A and B strains First Phase 1 study demonstrated safety and tolerability in healthy volunteers with pharmacokinetics and pharmacodynamics (PK/PD) data to support the potential use of a single oral dose for treatment or prophylaxis We plan to initiate Phase 1 dose extension to evaluate one additional, higher dose prior to the initiation of Phase 2 studies in H2 2024. Topline data from the Phase 2 study are expected in H1 2025 TRX01 (ratutrelvir): a ritonavir-free Mpro protease inhibitor for COVID19: Phase 1 Potent oral inhibitor of SARS-CoV-2 Mpro (3CL protease), effective against the original, delta, and omicron variants of SARS-CoV-2, that does not require co-administration with ritonavir, reducing the risk of drug-drug interactions. Preclinical data support once-daily dosing for 10days which could overcome viral rebound seen with other agents. We are in the process of conducting a Phase 1 first-in-human single ascending dose/multiple ascending dose (SAD/MAD) study in normal volunteers. The second dosing cohort is underway and topline data are expected H2 2024. A Phase 2 study is also planned to begin in H2 2024 in patients with moderate to severe COVID19. Topline data are expected H1 2025 Narazaciclib: CDK 4+ to treat solid tumors: Phase 1/2 Available preclinical and clinical data suggest that narazaciclib is active in numerous tumor types, inhibiting CDK 2/4/6, CSF1R and ARK 5/NUAK1. Preclinical studies also showed reduced neutropenia, as compared to palbociclib, and inhibition of palbociclib resistant cancer cells. A dose escalation study to define the recommended Phase 2 dose (RP2D) recently enrolled the last cohort. A review of the clinical and PK/PD data is underway. We intend to utilize these data to define the clinical strategy, including selection of a lead indication and next steps in its development. First Quarter 2024 Financial Results Cash and cash equivalents as of March 31, 2024, were $16.4 million, compared with $20.8 million as of December 31, 2023. In April 2024, the Company raised gross proceeds of $14 million from the sale of common and preferred stock to TPAV, LLC, an affiliate of Torrey Pines, and OrbiMed Private Investments VIII, LP, an affiliate of OrbiMed Advisors. The Company believes that its cash and cash equivalents will be sufficient to fund ongoing clinical trials and business operations into the fourth quarter of 2024. Revenue was fifty-six thousand dollars for the first quarter of 2024, consistent with the same period in 2023. General and administrative (G&A) expenses were $3.4 million for the first quarter of 2024, compared with $2.1 million for the same period in 2023. The increase in G&A expenses was caused by higher legal and professional fees related to the Trawsfynydd acquisition on April 1, 2024, partially offset by lower bonus accrual as well as lower insurance, meeting, and public company expenses. Research and development (R&D) expenses were $1.9 million for the first quarter of 2024, compared with $4.1 million for the same period in 2023. The decrease was primarily caused by lower costs related to narazaciclib drug substance and drug product manufacturing, a reduction in clinical development and consulting costs and lower personnel expenses due to lower bonus accrual. Net loss for the first quarter of 2024 was $5.0 million, or $0.24 per share on 20.8 million weighted average shares outstanding, compared with a net loss of $5.8 million, or $0.28 per share for the same period in 2023, based on 20.8 million weighted average shares outstanding. About Traws Pharma, Inc. Traws Pharma is a clinical stage biopharmaceutical company developing oral small molecule therapies for the treatment of respiratory viral diseases and cancer. The viral respiratory disease program includes an oral inhibitor of the SARS-CoV-2 Mpro (3CL protease), ratutrelvir, and tivoxavir marboxil, a new oral antiviral drug candidate for influenza which targets the influenza cap-dependent endonuclease and has shown activity in cell-based assays against drug resistant viruses as well as against avian flu. In the cancer program, Traws is developing the novel, proprietary multi-kinase CDK4-plus inhibitor narazaciclib potentially for refractory endometrial cancer and other solid tumor cancers. Narazaciclib targets pathways involved in the development of resistance to CDK inhibitors. Traws Pharma is committed to delivering novel compounds for unmet medical needs using state-of-the-art drug development technology. With a focus on product safety and a commitment to patients in need or that are specifically vulnerable, we build solutions for important medical challenges, aiming to alleviate the burden of viral infections and cancer. Forward-Looking Statements Some of the statements in this release are forward-looking statements within the meaning of Section 27A of the Securities Act of 1933, as amended, Section 21E of the Securities Exchange Act of 1934, as amended, and the Private Securities Litigation Reform Act of 1995, and involve risks and uncertainties including statements regarding the Phase 1 study of ratutrelvir in Australia and its design, timing and potential results and the timing of a planned Phase 2 study. Traws has attempted to identify forward-looking statements by terminology including “believes”, “estimates”, “anticipates”, “expects”, “plans”, “intends”, “may”, “could”, “might”, “will”, “should”, “preliminary”, “encouraging”, “approximately” or other words that convey uncertainty of future events or outcomes. Although Traws believes that the expectations reflected in such forward-looking statements are reasonable as of the date made, expectations may prove to have been materially different from the results expressed or implied by such forward looking statements. These statements are only predictions and involve known and unknown risks, uncertainties, and other factors, including the success and timing of Traws’ clinical trials, collaborations, market conditions and those discussed under the heading “Risk Factors” in Traws’ filings with the Securities and Exchange Commission. Any forward-looking statements contained in this release speak only as of its date. Traws undertakes no obligation to update any forward-looking statements contained in this release to reflect events or circumstances occurring after its date or to reflect the occurrence of unanticipated events. Traws Pharma, Inc. Contact: Mark Guerin Traws Pharma, Inc. 267-759-3680 Investor Contact: Bruce Mackle LifeSci Advisors, LLC 646-889-1200 bmackle@lifesciadvisors.com Traws Pharma, Inc. Condensed Consolidated Balance Sheets March 31, December 31, 2024 2023 Assets (unaudited) Current assets: Cash and cash equivalents $ 16,390,000 $ 20,821,000 Receivables 18,000 18,000 Prepaid expenses and other current assets 1,745,000 1,821,000 Total current assets 18,153,000 22,660,000 Property and equipment, net 18,000 22,000 Other non-current assets 1,000 1,000 Total assets $ 18,172,000 $ 22,683,000 Liabilities and stockholders’ equity Current liabilities: Accounts payable $ 6,568,000 $ 5,619,000 Accrued expenses and other current liabilities 2,628,000 3,375,000 Deferred revenue 226,000 226,000 Total current liabilities 9,422,000 9,220,000 Deferred revenue, non-current 2,735,000 2,791,000 Total liabilities 12,157,000 12,011,000 Commitments and contingencies Stockholders’ equity: Preferred stock, $0.01 par value, 5,000,000 shares authorized, none issued and outstanding at March 31, 2024 and December 31, 2023 — — Common stock, $0.01 par value, 125,000,000 shares authorized, 21,085,935 and 21,003,409 shares issued and outstanding at March 31, 2024 and December 31, 2023, respectively 211,000 210,000 Additional paid in capital 493,448,000 493,116,000 Accumulated deficit (487,614,000 ) (482,631,000 ) Accumulated other comprehensive loss (30,000 ) (23,000 ) Total stockholders’ equity 6,015,000 10,672,000 Total liabilities and stockholders’ equity $ 18,172,000 $ 22,683,000 Traws Pharma, Inc. Condensed Consolidated Statements of Operations Three Months Ended March 31, 2024 2023 Revenue $ 56,000 $ 56,000 Operating expenses: General and administrative 3,356,000 2,113,000 Research and development 1,912,000 4,080,000 Total operating expenses 5,268,000 6,193,000 Loss from operations (5,212,000 ) (6,137,000 ) Other income, net 229,000 362,000 Net loss $ (4,983,000 ) $ (5,775,000 ) Net loss per share, basic and diluted $ (0.24 ) $ (0.28 ) Basic and diluted weighted average shares outstanding 20,803,746 20,960,171

Investigational travatrelvir demonstrated preclinical activity against multiple SARS-CoV-2 variants Orally administered novel protease inhibitor does not require ritonavir co-administration First-in-Human study to evaluate safety, tolerability and pharmacokinetics in healthy volunteers Topline Phase 1 data and Phase 2 initiation expected in H2 2024 NEWTOWN, Pa., May 07, 2024 (GLOBE NEWSWIRE) -- Traws Pharma, Inc. (“Traws” or “Traws Pharma”), a clinical stage biopharmaceutical company developing oral small molecules for respiratory viral diseases and cancer, today announced that it completed dosing in the first cohort of the first-in-human Phase 1 study to evaluate travatrelvir (TRX01), an orally-available protease inhibitor, in development for treatment of COVID19. There have been no safety observations reported. “COVID-19 remains a significant global health concern, with SARS-CoV-2 infections posing a leading cause of mortality, especially among individuals aged 65 and above,” stated Werner Cautreels, Ph.D., Chief Executive Officer of Traws Pharma. “Our mission at Traws is to develop novel agents to treat respiratory viral diseases. Subject to future study results, we believe that travatrelvir may represent a major potential advance in the treatment of SARS-CoV-2 and are thrilled to advance this program into the first human clinical studies. We expect to report topline data from the Phase 1 study in H2 2024, followed by the initiation of an international Phase 2 safety and efficacy study." Robert R. Redfield, M.D., Chief Medical Officer of Traws Pharma and former director of the US Centers for Disease Control (CDC) added, “Travatrelvir has an exciting and unique profile. In preclinical trials, it is active against multiple SARS-CoV-2 variants, does not require ritonavir co-administration and has a pharmacokinetic profile that may enable a dosing regimen that reduces the likelihood of viral rebound. These qualities may enable travatrelvir to overcome some of the limitations reported with other treatments and position travatrelvir as a potential best-in-class agent. We are grateful for the collaboration of the clinical investigators, human volunteers, and study sites and hope that travatrelvir will represent a new treatment option for this deadly viral disease.” About Travatrelvir, the Phase 1 Program and Planned Next Steps Travatrelvir was designed as an inhibitor of the SARS-CoV-2 Mpro (3CL protease). It has demonstrated in vitro activity against the original strain of the virus as well as the delta and omicron variants and is more active than nirmatrelvir (Pfizer’s Mpro inhibitor) in preclinical studies. Also in preclinical studies, travatrelvir did not require co-administration with a human cytochrome P450 (CYP) inhibitor, such as ritonavir, and so it is expected to avoid associated drug:drug interactions, potentially permitting wider patient use. The drug candidate’s pharmacokinetic (PK) profile may enable a once daily, 10-day treatment regimen to reduce the likelihood of viral rebound. GLP toxicology studies did not identify adverse events (AEs) in animals at the doses being studied in the Phase 1 clinical trial. The Phase 1 study will evaluate single and multiple ascending doses of travatrelvir in a double-blinded, placebo-controlled study to assess safety, tolerability, and pharmacokinetics. Subjects will be randomized 3:1 in five fasted and one fed single ascending dosing (SAD) cohorts and two multiple ascending dosing (MAD) cohorts. Topline data from the study, which is being conducted in Australia (ACTRN12624000220561p), and the initiation of an international Phase 2 study in subjects with moderate to severe COVID19, are expected to take place in H2 2024. About Traws Pharma, Inc. Traws Pharma is a clinical stage biopharmaceutical company developing oral small molecule therapies for the treatment of respiratory viral diseases and cancer. The viral respiratory disease program includes an oral inhibitor of the SARS-CoV-2 Mpro (3CL protease), and a new oral antiviral drug candidate for influenza which targets the influenza cap-dependent endonuclease and has shown activity in cell-based assays against drug resistant viruses as well as against avian flu. In the cancer program, Traws is developing the novel, proprietary multi-kinase CDK2/4/6 inhibitor narazaciclib for refractory endometrial cancer and potentially other cancers. Narazaciclib targets pathways involved in the development of resistance to CDK inhibitors. Traws Pharma is committed to delivering novel compounds for unmet medical needs using state-of-the-art drug development technology. With a focus on product safety and a commitment to patients in need or that are specifically vulnerable, we build solutions for important medical challenges, aiming to alleviate the burden of viral infections and cancer. Forward-Looking Statements Some of the statements in this release are forward-looking statements within the meaning of Section 27A of the Securities Act of 1933, as amended, Section 21E of the Securities Exchange Act of 1934, as amended, and the Private Securities Litigation Reform Act of 1995, and involve risks and uncertainties including statements regarding the Phase 1 study of travatrelvir in Australia and its design, timing and potential results and the timing of a planned Phase 2 study. Traws has attempted to identify forward-looking statements by terminology including “believes”, “estimates”, “anticipates”, “expects”, “plans”, “intends”, “may”, “could”, “might”, “will”, “should”, “preliminary”, “encouraging”, “approximately” or other words that convey uncertainty of future events or outcomes. Although Traws believes that the expectations reflected in such forward-looking statements are reasonable as of the date made, expectations may prove to have been materially different from the results expressed or implied by such forward looking statements. These statements are only predictions and involve known and unknown risks, uncertainties, and other factors, including the success and timing of Traws’ clinical trials, collaborations, market conditions and those discussed under the heading “Risk Factors” in Traws’ filings with the Securities and Exchange Commission. Any forward-looking statements contained in this release speak only as of its date. Traws undertakes no obligation to update any forward-looking statements contained in this release to reflect events or circumstances occurring after its date or to reflect the occurrence of unanticipated events. Traws Pharma, Inc. Contact:Mark GuerinTraws Pharma, Inc.267-759-3680www.trawspharma.com Investor Contact:Bruce Mackle LifeSci Advisors, LLC646-889-1200bmackle@lifesciadvisors.com