OS Therapies (NYSE-A: OSTX) ("OS Therapies" or "the Company"), a clinical-stage immunotherapy and Antibody Drug Conjugate (ADC) biopharmaceutical company, today announced that it has submitted a request for a formal meeting with the Center for Biologics Evaluation and Research (CBER) of the United States Food & Drug Administration (FDA) to gain alignment on the clinical endpoints required to support Breakthrough Therapy Designation (BTD) and Accelerated Approval via a conditional BLA of investigational off-the-shelf immunotherapy candidate OST-HER2 in the prevention or delay of recurrence of fully resected, lung metastatic osteosarcoma. The meeting is expected to occur in the second quarter of 2025, and thereafter the Company intends to initiate a rolling BLA submission with the potential to receive Accelerated Approval as early as year-end 2025. The Company has sufficient cash on hand to operate into mid-2026.