OS Therapies Selects EVERSANA To Support U.S. Commercialization Of OST-HER2, Immunotherapy For Recurrent, Fully Resected, Pediatric Lung Metastatic Osteosarcoma

OS Therapies Inc. (NYSE-A: OSTX) ("OS Therapies" or "the Company"), a clinical-stage cancer immunotherapy and antibody drug conjugate biotechnology company, has selected EVERSANA®, a leading provider of global commercial services to the life sciences industry, to support the U.S. commercialization of OST-HER2, a novel immunotherapy for recurrent, fully resected, pediatric lung metastatic osteosarcoma.

OST-HER2, a Listeria monocytogenes-based immunotherapy, is the first potential new treatment in over 40 years for pediatric osteosarcoma, a rare, aggressive bone cancer that often metastasizes to the lungs, primarily affecting children and adolescents. The therapy has received Orphan, Fast Track and Rare Pediatric Disease Designations from the U.S. Food and Drug Administration (FDA), with a Biologics License Application (BLA) rolling submission targeted to begin in the third quarter of 2025, with potential approval coming as early as year end 2025.

EVERSANA will activate its dedicated end-to-end EVERSANA ONCOLOGY Commercialization model, including market access, medical affairs, field deployment, patient services and stakeholder engagement. The fully integrated platform accelerates awareness and access to OST-HER2 among healthcare providers treating osteosarcoma, as well as the potential to treat additional HER2-positive cancers.

The announcement follows OS Therapies' recent issuance of U.S. Patent #12,239,738, securing commercial manufacturing exclusivity for OST-HER2 and its broader Listeria-based immunotherapy platform through 2040.