2,040 institutions reported holding $57.95B of MARATHON PETE CORP (MPC) in SEC 13F filings for 2026-06-30. Largest institutional holders: VANGUARD GROUP INC ($9.67B), BlackRock, Inc. ($6.65B), STATE STREET CORP ($4.72B), GEODE CAPITAL MANAGEMENT, LLC ($2.13B), MORGAN STANLEY ($1.51B). Source: SEC Form 13F.
Source: SEC Form 13F filings · as of 2026-06-30