Marathon Petroleum Corporation
Marathon Petroleum Corporation (MPC) Stock Ownership
Institutional vs insider vs public ownership from 13F and float data — top holders, activity, and insider trades below.
SEC 13F · FMP · MPC · as of Mar 31, 2025
Ownership Breakdown
1,610
Institutional Holders
▼ 7 vs Q4
$33.69B
Total Inst. Value
▲ $1.30B vs Q4
291.94M
Shares Outstanding
freeFloat 99.69%
236.26M
13F Shares Held
▲ 29,529 vs Q4
Institutional ownership = 13F shares ÷ total outstanding. Insider % = 100 − free float. Public % = free float − institution %. Data: FMP /symbol-positions-summary + /shares-float + SEC EDGAR.
Top Institutional Holders
MPC largest shareholders · institutional ownership
Q1 2025 · SEC 13F
Showing top 10 holders
| Holder | Shares | % Owned | Weight | Value | Reported | Change |
|---|---|---|---|---|---|---|
VANGUARD GROUP INC petroleum refining | 34.94M | 11.16% | 11.16% | $5.09T | May 9, 2025 | ▲ 3.83M |
BLACKROCK, INC. petroleum refining | 24.32M | 7.77% | 7.77% | $3.54T | May 2, 2025 | ▼ 431.5K |
STATE STREET CORP petroleum refining | 19.47M | 6.22% | 6.22% | $2.84T | May 15, 2025 | ▼ 1.23M |
WELLINGTON MANAGEMENT GROUP LLP petroleum refining | 11.82M | 3.78% | 3.78% | $1.72T | May 13, 2025 | ▲ 1.86M |
GEODE CAPITAL MANAGEMENT, LLC petroleum refining | 6.98M | 2.23% | 2.23% | $1.01T | May 13, 2025 | ▲ 65.1K |
MORGAN STANLEY petroleum refining | 6.55M | 2.09% | 2.09% | $954.57B | May 15, 2025 | ▼ 301.0K |
RAYMOND JAMES FINANCIAL INC petroleum refining | 6.04M | 1.93% | 1.93% | $879.61B | May 13, 2025 | ▲ 353.5K |
BOSTON PARTNERS petroleum refining | 5.45M | 1.74% | 1.74% | $791.27B | May 13, 2025 | ▲ 2.01M |
BANK OF NEW YORK MELLON CORP petroleum refining | 4.98M | 1.59% | 1.59% | $725.88B | Apr 29, 2025 | ▲ 178.4K |
DEMARS FINANCIAL GROUP, LLC petroleum refining | 4.71M | 1.51% | 1.51% | $32.35B | Apr 18, 2025 | ▲ 536.5K |
Data from SEC Form 13F filings. Ownership bar normalised to largest holder. Change flags: isNew / isSoldOut / changeInSharesNumber (FMP extract-analytics/holder).
Institutional Activity
Q1 2025 vs prior quarter
Q1 2025
21
Increased
+13.67M shares2
New Positions
first time holders27
Decreased
−6.70M shares0
Sold Out
fully exitedNet shares change (top 50)
+6.97M
+13.67M / −6.70M
Net new holders
-4
2 new / 0 exited
Based on top 50 institutional holders by position size. Fields: isNew, isSoldOut, changeInSharesNumber (FMP extract-analytics/holder, limit=50).
Insider Buying vs Selling
MPC insider trading · insider activity
Source: SEC Form 4
Insiders have been primarily selling shares recently. Selling may be driven by pre-scheduled Rule 10b5-1 plans rather than negative sentiment.
10
Buy transactions
1
Sell transactions
10.00
Buy/Sell ratio
$0M
Total disposed
Recent Insider Transactions
Showing 10 most recent · Common Stock only
| Name · Role | Date | Type | Shares | Price | Value | After Trans. | Filing |
|---|---|---|---|---|---|---|---|
Hessling Ricky D. Chief Commercial Officer | May 13, 2026 | Sale | 1,000 | $250.00 | $250.0K | 6.5K | Form 4 ↗ |
SURMA JOHN P director | Apr 30, 2026 | Award | 727.742 | — | — | 60.9K | Form 4 ↗ |
STICE J MICHAEL director | Apr 30, 2026 | Award | 727.742 | — | — | 24.7K | Form 4 ↗ |
SEMPLE FRANK M director | Apr 30, 2026 | Award | 727.742 | — | — | 14.7K | Form 4 ↗ |
Rucker Kim K.W. director | Apr 30, 2026 | Award | 727.742 | — | — | 20.0K | Form 4 ↗ |
Paterson Eileen P. director | Apr 30, 2026 | Award | 727.742 | — | — | 3.2K | Form 4 ↗ |
Ellison-Taylor Kimberly N director | Apr 30, 2026 | Award | 727.742 | — | — | 3.2K | Form 4 ↗ |
COHEN JONATHAN Z director | Apr 30, 2026 | Award | 727.742 | — | — | 16.2K | Form 4 ↗ |
CAMPBELL JEFFREY C director | Apr 30, 2026 | Award | 727.742 | — | — | 2.6K | Form 4 ↗ |
Bayh Evan director | Apr 30, 2026 | Award | 727.742 | — | — | 73.0K | Form 4 ↗ |
Source: /insider-trading/search (FMP stable). Buy/Sell direction: acquisitionOrDisposition A=Buy, D=Sell. RSU vesting (M-Exempt) excluded from sentiment bar. All data from SEC EDGAR public filings.
About institutional & insider ownership
Marathon Petroleum Corporation (MPC) is primarily owned by institutional investors, who hold approximately 80.9% of total shares outstanding. Company insiders own approximately 0.31%, while retail and public investors account for the remaining 18.77%.
The largest institutional shareholder of Marathon Petroleum Corporation is VANGUARD GROUP INC, holding approximately 34.94 million shares — equal to 11.16% of outstanding shares — as of March 31, 2025.
A total of 1,610 institutional investors currently hold MPC stock, with a combined institutional value of approximately $33.69 billion as of the most recent 13F filing period.
Frequently asked questions
MPC ownershipMarathon Petroleum Corporation (MPC) is primarily owned by institutional investors, who hold approximately 80.9% of shares. The largest shareholder is VANGUARD GROUP INC with a 11.16% stake. Company insiders hold 0.31%. Data sourced from SEC Form 13F as of March 31, 2025.