277 institutions reported holding $2.10B of SUMMIT THERAPEUTICS INC (SMMT) in SEC 13F filings for 2026-06-30. Largest institutional holders: BAKER BROS. ADVISORS LP ($477.7M), VANGUARD GROUP INC ($172.4M), FMR LLC ($146.3M), STATE STREET CORP ($139.0M), BlackRock, Inc. ($138.8M). Source: SEC Form 13F.
Source: SEC Form 13F filings · as of 2026-06-30