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Management will participate at Jefferies Global Healthcare Conference, H.C. Wainwright Global Investment Conference, ROTH Healthcare Opportunities Conference Management and business development advisors will attend BioJapan Interim 3-year overall survival data, U.S. FDA Type C Statistical Methods meeting and U.K. MHRA Statistical Methods Scientific Advice Meeting expected in September 2026 RMAT and Rolling Review…

Meeting to occur in mid-September 2026 Interim 3-year Overall Survival data expected early September, 2026 Decisions on appropriate comparator arm to interpret OST-HER2 clinical efficacy, RMAT designation and Rolling Review expected following this meeting Sustained overall survival benefit observed between 2-year and 2.5-year timepoints U.K. MHRA Statistical Methods Scientific Advice Meeting granted in parallel New…

20% of OST-HER2 treated dogs survived 2-year vs. 1% in control group (p = 0.00995) Over 15,000 dogs per year diagnosed with osteosarcoma Company expects to submit U.S. Department of Agriculture meeting request to gain alignment on regulatory path towards conditional approval in the third quarter of 2026 OS Therapies reiterates plan to distribute OS Animal Health shares to shareholders OS Animal Health plans…