Marathon Petroleum's three largest insider shareholders as of August 29, 2026 are Michael J Hennigan (Executive Chairman, 220.90K shares), Maryann T. Mannen (Chairman, President Ceo, 110.94K shares), Evan Bayh (Director, 73.00K shares).
| # | Insider | Position | Direct | Indirect | Total | Share of Insiders | Last Filed |
|---|---|---|---|---|---|---|---|
| 1 | Michael J Hennigan | Executive Chairman | 220,902 | 0 | 220,902 | 23.0% | 16 Dec, 2025 |
| 2 | Maryann T. Mannen | Chairman, President Ceo | 110,939 | 0 | 110,939 | 11.5% | 04 Aug, 2026 |
| 3 | Evan Bayh | Director | 73,001 | 0 | 73,001 | 7.6% | 04 May, 2026 |
| 4 | Raymond L Brooks | Ex. Vp, Refining | 63,248 | 0 | 63,248 | 6.6% | 25 May, 2022 |
| 5 | John P Surma | Director | 60,901 | 0 | 60,901 | 6.3% | 04 May, 2026 |
| 6 | Suzanne Gagle | Gen Counsel And Svp Gov Aff | 45,837 | 0 | 45,837 | 4.8% | 05 Dec, 2023 |
| 7 | John J Quaid | Exec Vp Chief Fin Ofc | 35,457 | 0 | 35,457 | 3.7% | 04 Mar, 2025 |
| 8 | Charles E Bunch | Director | 34,734 | 0 | 34,734 | 3.6% | 03 Apr, 2025 |
| 9 | Steven A Davis | Director | 32,496 | 0 | 32,496 | 3.4% | 05 Jul, 2022 |
| 10 | Gregory Scott Floerke | Ex Vp Coo, Mplx Gp Llc | 31,031 | 0 | 31,031 | 3.2% | 03 Mar, 2026 |
| 11 | Molly R Benson | Chief Legal Ofc Corp Sec | 30,334 | 0 | 30,334 | 3.2% | 19 Aug, 2026 |
| 12 | Susan Tomasky | Director | 28,233 | 0 | 28,233 | 2.9% | 03 Apr, 2025 |
| 13 | Khayyal Abdulaziz Fahd Al | Director | 25,951 | 0 | 25,951 | 2.7% | 04 May, 2026 |
| 14 | J Michael Stice | Director | 24,721 | 0 | 24,721 | 2.6% | 04 May, 2026 |
| 15 | Edward G Galante | Director | 23,976 | 0 | 23,976 | 2.5% | 03 Apr, 2025 |
| 16 | Kim K.W. Rucker | Director | 19,955 | 0 | 19,955 | 2.1% | 04 May, 2026 |
| 17 | Jonathan Z Cohen | Director | 16,235 | 0 | 16,235 | 1.7% | 04 May, 2026 |
| 18 | Frank M Semple | Director | 14,720 | 0 | 14,720 | 1.5% | 04 May, 2026 |
| 19 | Timothy J Aydt | Ex Vp, Refining | 12,739 | 0 | 12,739 | 1.3% | 04 Mar, 2025 |
| 20 | Shawn M Lyon | Svp Log Storage, Mplx Gp Llc | 11,194 | 0 | 11,194 | 1.2% | 01 Sep, 2026 |
| 21 | Michael A Ii Henschen | Ex Vp, Refining | 10,889 | 0 | 10,889 | 1.1% | 14 Aug, 2026 |
| 22 | Thomas Kaczynski | Svp, Finance And Treasurer | 7,871 | 0 | 7,871 | 0.8% | 06 Dec, 2022 |
| 23 | Ricky D. Hessling | Chief Commercial Officer | 6,525 | 0 | 6,525 | 0.7% | 15 May, 2026 |
| 24 | Carl Kristopher Hagedorn | Senior Vp And Controller | 5,480 | 0 | 5,480 | 0.6% | 15 Nov, 2023 |
| 25 | Maria A Khoury | Exec Vp Chief Fin Ofc | 4,017 | 0 | 4,017 | 0.4% | 03 Mar, 2026 |
| 26 | Kimberly N Ellison-Taylor | Director | 3,203 | 0 | 3,203 | 0.3% | 04 May, 2026 |
| 27 | Eileen P. Paterson | Director | 3,203 | 0 | 3,203 | 0.3% | 04 May, 2026 |
| 28 | Jeffrey C Campbell | Director | 2,581 | 0 | 2,581 | 0.3% | 04 May, 2026 |
| 29 | Erin M Brzezinski | Vp And Controller | 1,576 | 0 | 1,576 | 0.2% | 31 Aug, 2026 |
| 30 | Toni Townes-Whitley | Director | 395 | 0 | 395 | 0.0% | 05 Apr, 2023 |
Each row is that insider’s most recently reported position, from Form 4 filings over the last 60 months — which is why this total does not tie to the quarterly series above, where a quarter counts only the insiders who filed in it. Shares held through a fund or institutional portfolio are counted on the institutional ownership page instead.
| Date | Insider | Position | Transaction | Shares | Price | Value | Shares Held After | Ownership |
|---|---|---|---|---|---|---|---|---|
| 28 Aug, 2026 | Shawn M Lyon | Svp Log Storage, Mplx Gp Llc | Disposed S | 425 | $368.51 | $156.62K | 12,194 | Direct |
| 31 Aug, 2026 | Shawn M Lyon | Svp Log Storage, Mplx Gp Llc | Disposed S | 1,000 | $375.75 | $375.75K | 11,194 | Direct |
| 27 Aug, 2026 | Erin M Brzezinski | Vp And Controller | Disposed S | 570 | $362.79 | $206.79K | 1,576 | Direct |
| 17 Aug, 2026 | Molly R Benson | Chief Legal Ofc Corp Sec | Acquired M | 7,196 | $47.73 | $343.47K | 37,530 | Direct |
| 17 Aug, 2026 | Molly R Benson | Chief Legal Ofc Corp Sec | Disposed S | 7,196 | $358.57 | $2.58Mn | 30,334 | Direct |
| 17 Aug, 2026 | Molly R Benson | Chief Legal Ofc Corp Sec | Acquired M | 5,000 | $47.73 | $238.65K | 35,334 | Direct |
| 17 Aug, 2026 | Molly R Benson | Chief Legal Ofc Corp Sec | Disposed S | 5,000 | $358.57 | $1.79Mn | 30,334 | Direct |
| 17 Aug, 2026 | Molly R Benson | Chief Legal Ofc Corp Sec | Acquired M | 5,000 | $47.73 | $238.65K | 35,334 | Direct |
| 17 Aug, 2026 | Molly R Benson | Chief Legal Ofc Corp Sec | Disposed S | 5,000 | $358.57 | $1.79Mn | 30,334 | Direct |
| 17 Aug, 2026 | Molly R Benson | Chief Legal Ofc Corp Sec | Disposed M | 7,196 | $0.00 | $0 | 10,000 | Direct |
| 17 Aug, 2026 | Molly R Benson | Chief Legal Ofc Corp Sec | Disposed M | 5,000 | $0.00 | $0 | 5,000 | Direct |
| 17 Aug, 2026 | Molly R Benson | Chief Legal Ofc Corp Sec | Disposed M | 5,000 | $0.00 | $0 | 0 | Direct |
| 13 Aug, 2026 | Shawn M Lyon | Svp Log Storage, Mplx Gp Llc | Disposed S | 2,500 | $350.00 | $875.00K | 12,619 | Direct |
| 12 Aug, 2026 | Michael A Ii Henschen | Ex Vp, Refining | Disposed S | 6,011 | $341.56 | $2.05Mn | 10,889 | Direct |
| 03 Aug, 2026 | Maryann T. Mannen | Chairman, President Ceo | Disposed F | 908 | $311.78 | $283.10K | 110,939 | Direct |
| 04 Jun, 2026 | Michael A Ii Henschen | Ex Vp, Refining | Disposed S | 1,372 | $268.75 | $368.73K | 16,900 | Direct |
| 04 Jun, 2026 | Michael A Ii Henschen | Ex Vp, Refining | Acquired M | 4,964 | $49.94 | $247.90K | 21,864 | Direct |
| 04 Jun, 2026 | Michael A Ii Henschen | Ex Vp, Refining | Disposed S | 4,964 | $268.85 | $1.33Mn | 16,900 | Direct |
| 04 Jun, 2026 | Michael A Ii Henschen | Ex Vp, Refining | Disposed M | 4,964 | $0.00 | $0 | 0 | Direct |
| 13 May, 2026 | Ricky D. Hessling | Chief Commercial Officer | Disposed S | 1,000 | $250.00 | $250.00K | 6,525 | Direct |