Marathon Petroleum Corporation (MPC) Shareholders & Insider Trades
Marathon Petroleum shareholders at a glance
The largest holder of Marathon Petroleum stock is BlackRock Advisors LLC, with 20.6 million shares (7.33% of the company), worth about $7.68 billion as of September 25, 2026. The 10 largest holders together own 38.3%.
In Q2 2026, 2,033 institutional holdings reports listed shares worth $56.60 billion.
Insiders reported 86 transactions in the last two years: 12 sales worth $16.94 million and 2 purchases. The newest one on file is from August 31, 2026 (Lyon Shawn M., Officer).
Major holders as of September 25, 2026; quarterly totals from institutional holdings reports (latest Q2 2026); insider transactions on file through August 31, 2026.
Marathon Petroleum Corporation
Shareholders Summary
2026Q2
Ownership by Type
Geographic Distribution
Largest Marathon Petroleum shareholders
| Holder | Shares | % of company | Value |
|---|---|---|---|
| BlackRock Advisors LLC | 20.6 million | 7.33% | $7.7B |
| Vanguard Capital Management LLC | 19.1 million | 6.79% | $7.1B |
| State Street Corporation | 18.5 million | 6.58% | $6.9B |
| Vanguard Portfolio Management LLC | 15.6 million | 5.57% | $5.8B |
| Geode Capital Management LLC | 8.4 million | 2.97% | $3.1B |
| Eaton Vance Management | 5.9 million | 2.10% | $2.2B |
| Eagle Asset Management, Inc. | 5.7 million | 2.02% | $2.1B |
| Fidelity Management & Research Co. LLC | 5.4 million | 1.93% | $2.0B |
| BlackRock Life Ltd. | 4.4 million | 1.56% | $1.6B |
| BNY Mellon Investment Adviser, Inc. | 4.0 million | 1.43% | $1.5B |
As of September 25, 2026.
Marathon Petroleum institutional holdings by quarter
| Quarter | Reports | Shares | Value |
|---|---|---|---|
| Q2 2026 | 2,033 | – | $56.6B |
| Q1 2026 | 1,975 | 222.0 million | $53.9B |
| Q4 2025 | 1,760 | 224.0 million | $36.5B |
| Q3 2025 | 1,757 | 223.0 million | $43.0B |
| Q2 2025 | 1,656 | 234.0 million | $38.7B |
| Q1 2025 | 1,629 | 237.0 million | $33.8B |
| Q4 2024 | 1,645 | 237.0 million | $32.5B |
| Q3 2024 | 1,676 | 240.0 million | $39.3B |
Shares and value held by institutions that file quarterly holdings reports (options not included).
Marathon Petroleum insider trades
| Insider | Date | Title | Transaction | Value |
|---|---|---|---|---|
| Lyon Shawn M. | Aug 31, 2026 | Officer | Sale at price 368.51 - 375.75 per share. | $532,367 |
| Brzezinski Erin M | Aug 27, 2026 | Officer | Sale at price 362.79 per share. | $206,790 |
| Benson Molly R. | Aug 17, 2026 | Officer | Conversion of Exercise of derivative security at price 47.73 per share. | $820,765 |
| Benson Molly R. | Aug 17, 2026 | Officer | Sale at price 358.57 per share. | $6.2M |
| Lyon Shawn M. | Aug 13, 2026 | Officer | Sale at price 350.00 per share. | $875,000 |
| Henschen Michael A Ii | Aug 12, 2026 | Officer | Sale at price 341.56 per share. | $2.1M |
| Henschen Michael A Ii | Jun 4, 2026 | Officer | Conversion of Exercise of derivative security at price 49.94 per share. | $247,902 |
| Henschen Michael A Ii | Jun 4, 2026 | Officer | Sale at price 268.75 - 268.84 per share. | $1.7M |
| Hessling Ricky D. | May 13, 2026 | Officer | Sale at price 250.00 per share. | $250,000 |
| Rucker Kim K. W. | Apr 30, 2026 | Director | Stock Award(Grant) at price 0.00 per share. | – |
| Surma John P Jr. | Apr 30, 2026 | Director | Stock Award(Grant) at price 0.00 per share. | – |
| Ellison-Taylor Kimberly N | Apr 30, 2026 | Director | Stock Award(Grant) at price 0.00 per share. | – |
Newest 12 of 86 insider transactions in the last two years.
Questions and answers
Who owns the most Marathon Petroleum stock?
BlackRock Advisors LLC, with 7.33% of the company (as of September 25, 2026). Next: Vanguard Capital Management LLC (6.79%) and State Street Corporation (6.58%).
How many institutions own Marathon Petroleum stock?
2,033 institutional holdings reports listed Marathon Petroleum shares in Q2 2026 worth $56.60 billion.
Are Marathon Petroleum insiders buying or selling the stock?
In the last two years insiders reported 12 sales and 2 purchases (86 transactions in all); the newest on file is from August 31, 2026.
