Compass Therapeutics Stock Plummets After Mixed Trial Data in Biliary Tract Cancer Study on April 28, 2026 Biliary Tract Cancer CMPX COMPANION-002 Compass Therapeutics Overall Survival Progression-Free Survival stock drop tovecimig +
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UnitedHealth Group CEO Andrew Witty Steps Down; Stephen Hemsley Returns as CEO on May 14, 2025 Andrew Witty CEO financial guidance suspension leadership change personal reasons Stephen Hemsley stock drop Transition Mutation UnitedHealth Group +