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PARIS--( BUSINESS WIRE )--Evexta Bio SA, a clinical-stage biotechnology company focused on developing first-in-class therapies in oncology, announces the appointment of Robert Doebele as CMO consultant. Dr. Doebele's extensive academic background includes a MD and PhD in Immunology from the University of Pennsylvania School of Medicine, residency and fellowship training in Medical Oncology and Internal Medicine at the University of Chicago Pritzker School of Medicine, and a Bachelor of Arts in Molecular Biology from Princeton University. Throughout his career, Dr. Doebele has made significant contributions to cancer research, focusing on molecular diagnostics, cancer biology, and the development of biomarkers. His previous roles include Associate Clinical Professor at the University of Colorado Anschutz Medical Campus, where he also directed the Thoracic Oncology Research Initiative. Before joining Evexta Bio, Robert was co-founder, Chief Scientific Officer and Chief Medical Officer of Rain Oncology. As CMO consultant, Robert will support the Company’s clinical development strategy, provide expert advice for protocols, processes and rupitasertib clinical plans and participate in scientific advisory committees. Scott Filosi, CEO of Evexta Bio said: “ I am delighted to welcome Robert as CMO consultant. We are confident that Robert’s expertise will greatly enhance our ongoing efforts in advancing clinical research and improving patient outcomes.” About Evexta Bio ( https://www.evextabio.com ) Evexta Bio is a biopharmaceutical company exploring the new frontiers of oncology in search of daring novel therapeutic approaches with the potential to save lives. Now, in the clinic, the company is currently developing two proprietary therapeutic assets with novel mechanisms of action across several indications: Rupitasertib, an optimized S6K inhibitor with efficient AKT1/AKT3 control of compensatory AKT feed-back loop. The oral anti-tumor agent is expected to enter phase 2 clinical trial in ESR1 mt ER+ HER2- advanced breast cancer. EVX020, a sole-in-class KIF20A kinesin inhibitor having shown potent nonclinical efficacy in hematological and solid tumor models. Two strategies are under assessment, development of EVX020 as a prodrug and as a payload for antibody-drug conjugate (ADC). Founded by Truffle Capital, supported by Merck KGaA (Darmstadt, Germany) as shareholder, Evexta Bio has forged alliances with leaders in academia and industry, including CNRS, Paoli-Calmettes Institute (Marseille, France) and Merck KGaA. The company is supported by seasoned management team, board of directors and medical advisory board.

Evexta Bio Reports Progress towards Clinical Development of Rupitasertib in Advanced Breast Cancer Feedback from FDA following Type B meeting enables Evexta Bio to move forward in clinical development of rupitasertib in advanced breast cancer (ABC) Phase 2 clinical trial on track to start in Q4 2024 New preclinical efficacy data strengthen rationale to develop rupitasertib, in combination with elacestrant, in ESR1mt ER+ HER2- ABC Evexta Bio to present at 10th LSX World Congress taking place in London, April 29-30, 2024 Paris, France, April 22, 2024 - Evexta Bio SA, a clinical-stage biotechnology company focused on developing first-in-class therapies in oncology, today provided an update on the clinical development of its lead asset, rupitasertib, a selective oral inhibitor of S6K and AKT1/AKT3. Following a Type B meeting held on March 13, 2024, the U.S. Food and Drug Administration (FDA) provided Evexta Bio with valuable input on various aspects of rupitasertib development, including CMC, preclinical and clinical topics, enabling the company to proceed with the Phase 2 study in advanced breast cancer. The Phase 2 trial is expected to start enrolling patients in Q4/2024. This Phase 2, open label study will evaluate the safety and efficacy of rupitasertib + elacestrant (ORSERDU®) in patients with ER+1 HER2-2 advanced breast cancer with detectable mutation/s of the estrogen receptor 1 gene (ESR1mt). Rupitasertib is a selective oral inhibitor of S6K and AKT1/AKT3 designed to efficiently block the PI3K/AKT/mTOR (PAM) pathway while controlling the compensatory AKT feedback loop. In a Phase 1 trial (Tsimberidou et al 2021) involving heavily pretreated patients with various solid tumors, including those with ESR1mt, rupitasertib was shown to have a favorable safety pro with preliminary signs of efficacy. Recent preclinical studies in ESR1mt breast cancer models have shown compelling synergistic effects of rupitasertib administered in combination with elacestrant. These data support the preliminary clinical efficacy observed in the Phase 1 study and warrant the development of rupitasertib in ESR1mt ER+ HER2- advanced breast cancer patients. Scott Filosi, CEO of Evexta Bio,said: "The feedback we have received from the FDA on the clinical development plan for rupitasertib, along with the new preclinical efficacy data generated in estrogen-resistant breast cancer models, is enabling us to move forward with strong confidence to initiate our Phase 2 study. Advanced breast cancer patients with ESR1 mutations who progressed on or after a CDK4/6 inhibitor have limited treatment options, and our goal is to provide them with an effective and well-tolerated therapy choice.” Dominique Bridon, CSO of Evexta Bio,added: “Patients with ER+ HER2- breast cancer often develop resistance to first-line treatment with the acquisition of ESR1 mutations, and the prognosis for these patients is poor. In addition, S6K has been shown to be closely associated with the emergence of cancer resistance, particularly in breast cancer, through ER modulation. Rupitasertib, which inhibits S6K while controlling the AKT compensatory feedback loop, could be a major advance to better treat these patients who are in need of alternative therapies.” Upcoming meeting Evexta Bio will present at the LSX World Congress in London, April 29-30, 2024. ***** About Evexta Bio ( ) EvextaBio is a clinical-stage biopharmaceutical company exploring the new frontiers of oncology in search of daring novel therapeutic approaches with the potential to save lives. The company is currently developing two proprietary therapeutic assets with novel mechanisms of action across several indications: Rupitasertib, an optimized S6K inhibitor with efficient AKT1/AKT3 control of the compensatory AKT feedback loop. The oral anti-tumor agent is expected to enter a Phase 2 clinical trial in ESR1mt ER+ HER2- advanced breast cancer later in 2024. EVX020, a sole-in-class KIF20A kinesin inhibitor that has shown potent preclinical efficacy in hematological and solid tumor models. Two strategies are under assessment - development of EVX020 as a prodrug and as an antibody-drug conjugate (ADC) payload. Founded by Truffle Capital and supported by Merck KGaA (Darmstadt, Germany) as a shareholder, Evexta Bio has forged alliances with leaders in academia and industry, including CNRS, Paoli-Calmettes Institute (Marseille, France) and Merck KGaA. The company is supported by a seasoned management team, board of directors and medical advisory board. Contact ATCG PARTNERS Marie Puvieux +33 (0)6 10 54 36 72 presse@atcg-partners.com 1 Estrogen Receptor-positive. 2 Human Epidermal growth factor Receptor 2 negative. Attachment PR in English

Evexta Bio Announces the Appointment of Paul Gineste, PharmD, as Chief Development Officer Paul Gineste brings 25 years of experience in clinical development and strategy with leading international pharmaceutical and biotech companies.Recently, Paul served as Vice President, Clinical Operations at Abivax, where he led the development of drug candidates from discovery through global Phase 3 programs. Paris, France, January 4, 2024 - Evexta Bio SA, a clinical-stage biotechnology company focused on developing first-in-class therapies in oncology, announces the appointment of Paul Gineste as Chief Development Officer (CDO), effective January 1, 2024. Paul is an experienced senior executive with a track record of successful achievements in the Pharma and Biotech Industry. He has worked with leading international pharmaceutical and biotech companies, including as International Clinical Trials Manager at Boehringer Ingelheim, Head of Clinical Research and Development at Altana Pharma, Executive Vice President, Clinical Development at Theravectys, a lentiviral vector spin-off from the Institut Pasteur, and most recently for 9 years as Vice President, Clinical Operations at Abivax, where he led drug candidates from discovery through global Phase 3 programs. Scott Filosi, CEO of Evexta Bio, said: "I am delighted to welcome Paul as the new Chief Development Officer of Evexta Bio. With his extensive track record in the pharmaceutical and biotech industries, Paul is the best suited to lead our clinical development and strategy as our lead candidate, rupitasertib, is expected to enter a phase 2/3 clinical trial in refractory ER+ HER2 metastatic breast cancer.” Paul Gineste, PharmD, CDO of Evexta Bio, added: “I am genuinely pleased to join Evexta Bio and its experienced management team to advance its development strategy and in particular its clinical programs. Evexta Bio has two proprietary therapeutic assets with original mechanisms of action that may address unmet medical needs in multiple cancer indications. I look forward to leading and accelerating their clinical development.” ***** Upcoming opportunity to meet our team: EVEXTA BIO will be in San Francisco, CA, during the JP Morgan's 42nd Annual Healthcare Conference, January 8-11, 2024. Contact us today to arrange a meeting with our executives in San Francisco: Scott Filosi, Chief Executive Officer, and Dominique Bridon, Chief Scientific Officer. About Evexta Bio (https://www.evextabio.com) Evexta Bio, formerly Diaccurate, is a biopharmaceutical company revolutionizing cancer treatment with potential first-in-class therapies with unique mechanisms of action for combating tumor resistance . Now in the clinic, the French biotech is currently developing two proprietary therapeutic assets across several indications: Rupitasertib, formerly DIACC3010, a first-in-class S6K inhibitor addressing tumor resistance while blocking the compensatory AKT feedback loop. The oral anti-tumor agent is expected to enter phase 2/3 clinical trial in refractory ER+ HER2- metastatic breast cancer. EVX-020, formerly DIACC2020, an antibody-drug conjugate program using a first-in-class KIF20A kinesin inhibitor as payload in hematological and solid tumors. Founded by Truffle Capital, Evexta Bio has forged alliances with leaders in academia and industry, including CNRS, Paoli-Calmettes Institute (Marseille, France) and Merck KGaA (Darmstadt, Germany). The company is supported by seasoned management team, board of directors and medical advisory board. Contacts ATCG PARTNERSMarie Puvieux+33 (0)6 10 54 36 72presse@atcg-partners.com Attachment PR in English