MPC's three largest insider shareholders as of June 06, 2026 are Michael J Hennigan (Executive Chairman, 220.90K shares), Maryann T. Mannen (Chairman, President Ceo, 111.85K shares), Evan Bayh (Director, 71.06K shares).
| Holder | Position | Shares (Direct) | Shares (Indirect) | Report Date |
|---|---|---|---|---|
| Jonathan Z Cohen | - | 15,193 | 0 | 05 May, 2025 |
| Susan Tomasky | - | 28,233 | 0 | 03 Apr, 2025 |
| Jeffrey C Campbell | - | 0 | 6,090 | 06 Dec, 2024 |
| Edward G Galante | - | 23,976 | 0 | 03 Apr, 2025 |
| John P Surma | - | 58,957 | 0 | 05 May, 2025 |
| Charles E Bunch | - | 34,734 | 0 | 03 Apr, 2025 |
| Frank M Semple | - | 13,709 | 0 | 05 May, 2025 |
| Gregory Scott Floerke | Ex Vp Coo, Mplx Gp Llc | 31,031 | 0 | 03 Mar, 2026 |
| Michael J Hennigan | Executive Chairman | 220,902 | 0 | 16 Dec, 2025 |
| Steven A Davis | - | 32,496 | 0 | 05 Jul, 2022 |
| Maryann T. Mannen | Chairman, President Ceo | 111,847 | 0 | 03 Mar, 2026 |
| Kim K.W. Rucker | - | 18,944 | 0 | 07 Jul, 2025 |
| J Michael Stice | - | 23,508 | 0 | 05 May, 2025 |
| Evan Bayh | - | 71,057 | 0 | 05 May, 2025 |
| John J Quaid | Exec Vp Chief Fin Ofc | 35,457 | 0 | 04 Mar, 2025 |
| Carl Kristopher Hagedorn | Senior Vp And Controller | 5,480 | 0 | 15 Nov, 2023 |
| Khayyal Abdulaziz Fahd Al | - | 24,713 | 0 | 05 May, 2025 |
| Eileen P. Paterson | - | 2,425 | 0 | 05 May, 2025 |
| Thomas Kaczynski | Svp, Finance And Treasurer | 7,871 | 0 | 06 Dec, 2022 |
| Raymond L Brooks | Ex. Vp, Refining | 63,248 | 0 | 25 May, 2022 |
| Suzanne Gagle | Gen Counsel And Svp Gov Aff | 45,837 | 0 | 05 Dec, 2023 |
| Toni Townes-Whitley | - | 395 | 0 | 05 Apr, 2023 |
| Timothy J Aydt | Ex Vp, Refining | 12,739 | 0 | 04 Mar, 2025 |
| Kimberly N Ellison-Taylor | - | 2,425 | 0 | 05 May, 2025 |
| Shawn M Lyon | Svp Log Storage, Mplx Gp Llc | 15,119 | 0 | 13 Mar, 2026 |
| Molly R Benson | Chief Legal Ofc Corp Sec | 30,334 | 0 | 03 Mar, 2026 |
| Erin M Brzezinski | Vp And Controller | 2,146 | 0 | 03 Mar, 2026 |
| Ricky D. Hessling | Chief Commercial Officer | 7,525 | 0 | 17 Mar, 2026 |
| Michael A Ii Henschen | Ex Vp, Refining | 18,272 | 0 | 03 Mar, 2026 |
| Maria A Khoury | Exec Vp Chief Fin Ofc | 4,017 | 0 | 03 Mar, 2026 |
* Please note that the shares above only reflect shares from the fund portfolio and the institutional portfolio. Shares from the personal portfolio are excluded from this Institutional Ownership Page. See these insiders' latest transactions here on Insider Page.
| Transaction Date | Insider Name | Security Class | Transaction Type | Shares Traded | Price | Shares Remaining | Ownership | Code |
|---|---|---|---|---|---|---|---|---|
| 13 Mar, 2026 | Ricky D. Hessling | Common Stock | D | 1,626 | $228.18 | 7,525 | D | S |
| 11 Mar, 2026 | Shawn M Lyon | Common Stock | D | 1,186 | $0.00 | 15,119 | D | G |
| 11 Mar, 2026 | Ricky D. Hessling | Common Stock | D | 1,485 | $224.51 | 10,513 | D | S |
| 11 Mar, 2026 | Ricky D. Hessling | Common Stock | D | 325 | $226.00 | 10,188 | D | S |
| 12 Mar, 2026 | Ricky D. Hessling | Common Stock | D | 478 | $228.00 | 9,710 | D | S |
| 12 Mar, 2026 | Ricky D. Hessling | Common Stock | D | 559 | $230.00 | 9,151 | D | S |
| 01 Mar, 2026 | Shawn M Lyon | Common Stock | A | 1,730 | $0.00 | 17,078 | D | A |
| 01 Mar, 2026 | Maryann T. Mannen | Common Stock | A | 15,266 | $0.00 | 115,813 | D | A |
| 01 Mar, 2026 | Erin M Brzezinski | Common Stock | A | 509 | $0.00 | 2,296 | D | A |
| 01 Mar, 2026 | Molly R Benson | Common Stock | A | 2,544 | $0.00 | 31,137 | D | A |
| 01 Mar, 2026 | Gregory Scott Floerke | Common Stock | A | 1,730 | $0.00 | 31,838 | D | A |
| 01 Mar, 2026 | Ricky D. Hessling | Common Stock | A | 2,748 | $0.00 | 14,812 | D | A |
| 01 Mar, 2026 | Michael A Ii Henschen | Common Stock | A | 2,290 | $0.00 | 18,753 | D | A |
| 01 Mar, 2026 | Maria A Khoury | Common Stock | A | 2,443 | $0.00 | 4,017 | D | A |
| 02 Mar, 2026 | Molly R Benson | Common Stock | D | 171 | $206.30 | 30,966 | D | F |
| 02 Mar, 2026 | Erin M Brzezinski | Common Stock | D | 49 | $206.30 | 2,247 | D | F |
| 02 Mar, 2026 | Ricky D. Hessling | Common Stock | D | 192 | $206.30 | 14,620 | D | F |
| 02 Mar, 2026 | Maryann T. Mannen | Common Stock | D | 952 | $206.30 | 114,861 | D | F |
| 02 Mar, 2026 | Gregory Scott Floerke | Common Stock | D | 278 | $206.30 | 31,560 | D | F |
| 02 Mar, 2026 | Shawn M Lyon | Common Stock | D | 257 | $206.30 | 16,821 | D | F |