Additional forthcoming biomarker data from human trial expected to further characterize immune pathway activation and its relationship to clinical outcomes U.S., U.K. and European osteosarcoma key opinion leaders assembling to review clinical & biomarker trial data, and comment on proposed confirmatory trial design Ayala Pharmaceuticals announces dissolution following liquidation of assets New York, New York--(Newsfile Corp. - February 17, 2026) - OS Therapies Inc. (NYSE American: OSTX) ("OS Therapies" or "the Company"), the world leader in listeria-based cancer immunotherapies, today provided a global regulatory update for OST-HER2 in the prevention or delay of recurrent, fully resected, pulmonary metastatic osteosarcoma (the "Human Metastatic Osteosarcoma Program"). Following the submission of the Non-Clinical and Chemistry, Manufacturing & Controls (CMC) modules of its Biologics License Application (BLA) to U.S. Food & Drug Administration (FDA) at the end of January 2026, the Company anticipates releasing additional biomarker data from its Human Metastatic Osteosarcoma Program in the first quarter of 2026.