• Focus of work at JLABS on tunable Antibody Drug Conjugate linker-based platform

ROCKVILLE, Md. / Aug 19, 2024 / Business Wire / OS Therapies (NYSE American: OSTX) (“OS Therapies” or “the Company”), an ADC and Immunotherapy research and clinical-stage biopharmaceutical company, today announced that it has been accepted into Johnson & Johnson Innovation – JLABS. Through membership of JLABS, OS Therapies aims to further develop and enter the clinic with its tunable Antibody Drug Conjugate (ADC) linker-based platform that relies on pH sensitive linkers & coating technology to reduce off-target effects to improve safety and increase the number & diversity of therapeutic payloads delivered. Through these developments, OS Therapies hopes to offer improved efficacy versus other ADCs in the market or in development. Drug candidates developed using OS Therapies’ tunable ADC platform leverage this unique linker platform to create new intellectual property for both novel and off-patent targeting antibodies and drug payloads.

About OS Therapies

OS Therapies is a clinical stage oncology company focused on the identification, development and commercialization of treatments for Osteosarcoma (OS) and other solid tumors. OST-HER2, the Company’s lead asset, is an immunotherapy leveraging the immune-stimulatory effects of Listeria bacteria to initiate a strong immune response targeting the HER2 protein. The Company has completed enrollment for a 41-patient Phase 2b clinical trial of OST-HER2 in resected, recurrent osteosarcoma, with results expected in the fourth quarter of 2024. OST-HER2 has completed a Phase 1 clinical study primarily in breast cancer patients, in addition to showing strong preclinical efficacy data in various models of breast cancer. In addition, OS Therapies is advancing its next generation Antibody Drug Conjugate (ADC) platform, known as tunable ADC (tADC), which features tunable, tailored antibody-linker-payload candidates. This platform leverages the Company’s proprietary silicone linker technology, enabling the delivery of multiple payloads per linker. For more information, please visit www.ostherapies.com.

Forward-Looking Statements

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