Marathon Petroleum Corp (MPC)
Energy
Oil & Gas Refining & Marketing
307.00 $
-3.0%
vs. previous close
Closing price · As of: 3. Aug 2026
Who owns Marathon Petroleum Corp (MPC)? This page shows the largest institutions and funds, the ownership structure and the latest insider transactions. 99.7% of the shares are freely tradable; institutional investors hold 78.5%.
Ownership Structure
Institutional ownership
Share of the stock held by institutional investors (funds, banks, insurers) according to regulatory filings.
78.5%
Insiders
Share of the stock held by the executives, founders and major shareholders of the company itself.
0.3%
Float
Share of stock freely tradable on the market — not locked up in the hands of founders, insiders, or major shareholders.
99.7%
Short % of float
Shares sold short as a percentage of the freely tradable float — high values signal many bets on falling prices.
2.5%
Shares Outstanding
Total number of shares issued. Price times share count gives market cap.
292Mio.
Largest Shareholders
Institutions
| Name | Stake (%) | Shares | Change (%) | Date |
|---|---|---|---|---|
| BlackRock Inc | 8.36 | 24,394,842 | +8.8 | 03/31/2026 |
| Vanguard Capital Management, LLC | 6.57 | 19,170,094 | +0.0 | 03/31/2026 |
| State Street Corp | 6.52 | 19,025,020 | +6.1 | 03/31/2026 |
| Vanguard Portfolio Management, LLC | 5.37 | 15,672,113 | +0.0 | 03/31/2026 |
| Geode Capital Management, LLC | 2.68 | 7,821,524 | +0.7 | 03/31/2026 |
| Morgan Stanley - Brokerage Accounts | 2.08 | 6,073,543 | -0.2 | 03/31/2026 |
Funds
| Name | Stake (%) | Shares | Change (%) | Date |
|---|---|---|---|---|
| Cushing Midstream Strategy | 4.90 | 14,296,191 | +2.3 | 06/30/2026 |
| Vanguard Morn Total Stk Mkt Idx Investor | 3.18 | 9,269,332 | -1.2 | 06/30/2026 |
| Vanguard 500 Index Investor | 2.60 | 7,582,290 | -1.8 | 06/30/2026 |
| Vanguard Morn Mid Cap Index Instl | 2.17 | 6,326,596 | -1.1 | 06/30/2026 |
Largest reported positions according to regulatory filings; stake as a percentage of shares outstanding, change versus the previous filing. Source: fundamentals data.
Data as of: August 3, 2026 · Source: fundamental data & SEC filings (annual and quarterly reports, 10-K/10-Q)
Note: pure fact-based analysis, not investment advice and not a solicitation to buy or sell. All figures without guarantee.