Marathon Petroleum Corp (MPC) Institutional Ownership

Ownership Summary

Marathon Petroleum Corp (NYSE:MPC) has 1,611 institutional investors with active 13F positions as of December 2025.

• Collectively, these holders controlled 72.6% of Marathon Petroleum's outstanding shares in December 2025, down from 74.2% in September 2025.
• Their total shares held in MPC increased 0.64% quarter over quarter, and separately, investors owning Marathon Petroleum increased 5.85% from a year ago.
• Of these 1,611 funds, 744 grew their exposure to Marathon Petroleum, 563 cut back, and 304 maintained positions.
• The aggregate institutional position in Marathon Petroleum amounted to 220.8Mn shares as of December 2025, up by 1.41Mn shares quarter on quarter, and down 38.13Mn shares year over year.
• As of December 31, 2025, the biggest holder of Marathon Petroleum is BlackRock, Inc. at 24.39Mn shares, representing 8.02% of shares outstanding.
• The most significant purchases of MPC for the quarter ending December 2025 came from VANGUARD CAPITAL MANAGEMENT LLC (19.17Mn), VANGUARD PORTFOLIO MANAGEMENT LLC (15.67Mn), BlackRock, Inc. (1.97Mn), VANGUARD FIDUCIARY TRUST CO (1.66Mn), FMR LLC (1.44Mn).
• The biggest sellers of Marathon Petroleum for the quarter ending December 2025 included Goldman Sachs Group Inc (1.92Mn), WELLINGTON MANAGEMENT GROUP LLP (1.57Mn), Qube Research & Technologies Ltd (1.44Mn), HARRIS ASSOCIATES L P (1.23Mn), CITADEL ADVISORS LLC (710.19K).
• According to Business Quant data, leading holders of MPC for December 2025 are BlackRock, Inc. (24.39Mn), VANGUARD CAPITAL MANAGEMENT LLC (19.17Mn), State Street Corp (19.03Mn), VANGUARD PORTFOLIO MANAGEMENT LLC (15.67Mn), GEODE CAPITAL MANAGEMENT, LLC (7.82Mn), Morgan Stanley (6.07Mn), Raymond James Financial Inc (5.77Mn), Boston Partners (5.65Mn), WELLINGTON MANAGEMENT GROUP LLP (5.64Mn), FMR LLC (4.91Mn).