OS Therapies Appoints Industry Leader Dr. Craig Eagle as Chief Medical Advisor

Appointment strengthens medical, regulatory, and commercial leadership as Company prepares to complete early market access regulatory filings in the U.S., U.K, Europe and Australia in anticipation of OST-HER2 approval decisions expected by year-end 2026 Upcoming FDA Pre-BLA meeting will focus on the use of recent seroconversion biomarker data as a key surrogate clinical efficacy endpoint to support a BLA for OST-HER2 under the Accelerated Approval Program Commercialization and reimbursement preparations well underway for the U.S., U.K., and Europe in parallel with ongoing partnership discussions New York, New York and Rockville, Maryland--(Newsfile Corp. - May 14, 2026) - OS Therapies, Inc. (NYSE American: OSTX) ("OS Therapies" or "the Company"), the world leader in gene-edited, listeria-based cancer immunotherapies, announced Dr. Craig Eagle's appointment as Chief Medical Advisor. His appointment strengthens the Company's medical, regulatory, and commercial leadership team in preparation for potential early market access decisions from regulators at the U.S. Food & Drug Administration (FDA), U.K. Medicines and Healthcare products Regulatory Agency (MHRA), European Medicines Agency (EMA) and Australian Therapeutic Good Administrations (ATGA) for OST-HER2 in the prevention or delay of recurrence in fully-resected, pulmonary metastatic osteosarcoma (the "Metastatic Osteosarcoma Program").