Compass Therapeutics to Announce Topline Secondary Endpoints from the Phase 2/3 COMPANION-002 Study of Tovecimig in Patients with Biliary Tract Cancer

About this update from Compass Therapeutics, Inc.

BOSTON, April 24, 2026 (GLOBE NEWSWIRE) -- Compass Therapeutics, Inc. (Nasdaq: CMPX), a clinical-stage, oncology-focused biopharmaceutical company developing proprietary antibody-based therapeutics to treat multiple human diseases, announced it will host a webcast on Monday, April 27, 2026 at 8:00am ET to review topline secondary endpoints from its Phase 2/3 COMPANION-002 clinical study assessing tovecimig (a DLL4 x VEGF-A bispecific antibody) in combination with paclitaxel in patients with advanced biliary tract cancer (BTC). Conference Call and Webcast Presentation: Date and Time: Monday, April 27, 2026 at 8:00am ET Toll Free: 1-877-407-9716 International: 1-201-493-6779 Conference ID: 13760371 Webcast Presentation: https://viavid.webcasts.com/starthere.jsp?ei=1761459&tp_key=efc315f5a6 A replay of the webcast and accompanying presentation will be available, for 90 days, following the event on the “ Events ” page under the Investors section of the Company’s website. About Compass Therapeutics Compass Therapeutics, Inc. was founded in 2014 and is headquartered in Boston, MA. Compass is a clinical-stage, oncology-focused biopharmaceutical company discovering and developing proprietary antibody-based therapeutics to treat multiple diseases. The company’s scientific focus is on the relationship between angiogenesis, the immune system and tumor growth. Compass has a robust pipeline of novel product candidates designed to target multiple key biological pathways to drive an effective anti-tumor response, including angiogenesis modulation, immune activation within the tumor microenvironment, and reduction of tumor-driven immunosuppression. The company is advancing discovery candidates through clinical development to commercial-stage assets. For more information, visit www.compasstherapeutics.com . Investor Contact [email protected] Media Contact Anna Gifford, Chief of Staff [email protected] 617-500-8099

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