Marathon Petroleum
MPC · NYSE
Who owns MPC
Largest institutional holders, from their latest 13F filings
The 10 largest institutions hold 33.4% of MPC’s shares.
- Vanguard Capital Management, LLC6.5%
- State Street Investment Management (US)6.3%
- BlackRock Institutional Trust Company, N.A.5.9%
- Vanguard Portfolio Management, LLC5.4%
- Next 6 largest institutions9.3%
- All other shareholders66.6%
| Holder | Shares | % of shares |
|---|---|---|
| Vanguard Capital Management, LLC | 19.07M | 6.53% |
| State Street Investment Management (US) | 18.47M | 6.33% |
| BlackRock Institutional Trust Company, N.A. | 17.08M | 5.85% |
| Vanguard Portfolio Management, LLC | 15.63M | 5.35% |
| Geode Capital Management, L.L.C. | 8.35M | 2.86% |
| Fidelity Management & Research Company LLC | 5.35M | 1.83% |
| Raymond James & Associates, Inc. | 3.69M | 1.26% |
| Boston Partners | 3.52M | 1.20% |
| Wellington Management Company, LLP | 3.25M | 1.11% |
| Dimensional Fund Advisors, L.P. | 3.06M | 1.05% |
Largest mutual fund holders
| Holder | Shares | % of shares |
|---|---|---|
| Vanguard Total Stock Market Index Fund | 9.30M | 3.18% |
| Vanguard 500 Index Fund | 7.66M | 2.62% |
| Vanguard Mid-Cap Index Fund | 6.32M | 2.16% |
| State Street Energy Select Sector SPDR ETF | 6.03M | 2.06% |
| iShares Core S&P 500 ETF | 3.89M | 1.33% |
Insider trades
Form 4 filings by officers, directors and large holders
Over the last 6 months, insiders sold $11.79M (11 trades) of MPC on the open market, with no buys.
| Insider | Type | Shares | Value |
|---|---|---|---|
| Lyon Shawn M | Sale | 1.00K | $375.75K |
| Lyon Shawn M | Sale | 425 | $156.62K |
| Brzezinski Erin M | Sale | 570 | $206.79K |
| Benson Molly R | Option exercise | 5.00K | — |
| Benson Molly R | Option exercise | 5.00K | — |
| Benson Molly R | Option exercise | 7.20K | — |
| Benson Molly R | Sale | 5.00K | $1.79M |
| Benson Molly R | Option exercise | 5.00K | $238.65K |
| Benson Molly R | Sale | 5.00K | $1.79M |
| Benson Molly R | Option exercise | 5.00K | $238.65K |
Congressional trades
Disclosed by members of Congress over the last 12 months
| Member | Type | Amount | Traded |
|---|---|---|---|
| David TaylorHouse | Sale | $1K–$15K | Sep 22, 2026 |
| David TaylorHouse | Sale | $1K–$15K | Sep 22, 2026 |
| David TaylorHouse | Sale | $1K–$15K | Jul 24, 2026 |
| David TaylorHouse | Sale | $1K–$15K | Jul 24, 2026 |
| Dan Newhouse | Sale | $1K–$15K | Jul 10, 2026 |
| David TaylorHouse | Sale | $1K–$15K | Mar 11, 2026 |
| David TaylorHouse | Sale | $1K–$15K | Feb 26, 2026 |
Short interest
Settled Sep 30, 2026
- Shares short
- 7.04M
- Days to cover
- 1.98
- % of shares outstanding
- 2.41%
- Average daily volume
- 3.55M
- Change since last report
- −8.8%
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