As of November 4, 2026, Marathon Petroleum Corp is a publicly traded company (NYSE: MPC); its largest reported holder is BlackRock, with 7.9% on Schedule 13G/A of October 27, 2026, then Vanguard (7.52%). The largest insider holding is Michael J. Hennigan, the chairman and a director, with 220,902 shares (0.08% of shares outstanding), per Form 4 of December 16, 2025 (Schedule 13G/A, October 27, 2026).
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Is Marathon Petroleum Corp a real, registered company?
- Marathon Petroleum Corp files with the SEC under CIK 1510295 (its SEC filings).
- Its shares are listed under the ticker MPC on NYSE (SEC company record).
- Incorporated in Delaware; business address in Findlay, Ohio, as its SEC filings state.
- Court and bankruptcy records: see Before you sign or pay below.
Before you sign or pay
- Court and bankruptcy: No federal court case or bankruptcy filing found under MARATHON PETROLEUM CORP in our court records and SEC 8-K records (as of 2026-11-04).
- Leadership changes: the latest reported is David E. Constable, Director (Form 8-K filed 2026-10-29). Check you are dealing with the people now in charge.
- Ownership: 5%+ holders are reported on Schedule 13D or 13G; the latest names BlackRock (filed 2026-10-27).
Who are Marathon Petroleum Corp's owners and officers?
Marathon Petroleum Corp: incorporated in Delaware; business address in Findlay, Ohio; industry Petroleum Refining (Form D, 2026-10-29).
| Report | Holder | Share |
|---|---|---|
| Schedule 13G/A, 2026-10-27 | Blackrock, Inc. | 7.9% |
| Schedule 13G, 2026-04-30 | Vanguard Capital Management | 7.52% |
| Schedule 13G, 2026-04-29 | Vanguard Portfolio Management | 5.35% |
| Schedule 13G/A, 2026-03-27 | The Vanguard Group | 0% |
| Schedule 13G/A, 2025-07-29 | The Vanguard Group | 12.65% |
Questions about who owns Marathon Petroleum Corp
Who owns Marathon Petroleum Corp?
On this page, 3 holders' latest ownership filings report 5% or more of Marathon Petroleum Corp: Blackrock, Inc. (7.9%, Schedule 13G/A, filed 2026-10-27), Vanguard Capital Management (7.52%, Schedule 13G, filed 2026-04-30) and Vanguard Portfolio Management (5.35%, Schedule 13G, filed 2026-04-29).
Who are the largest shareholders of Marathon Petroleum Corp?
By the share each holder's latest filing reports, the largest holders of Marathon Petroleum Corp on this page are Blackrock, Inc. (7.9%), Vanguard Capital Management (7.52%) and Vanguard Portfolio Management (5.35%).
When did Blackrock, Inc. buy into Marathon Petroleum Corp?
The filings give report dates, not purchase dates. The earliest filing from Blackrock, Inc. on this page is the Schedule 13G/A, filed 2026-10-27, reporting 7.9%. That earliest filing is itself an amendment, which updates an earlier report.
Is this an audit or a full list?
Neither. The ownership list on this page covers only Schedule 13D and 13G filings, which holders make once they own 5% or more of a class of shares (an amendment can report a stake that has since fallen below 5%); 5 such filings are shown here. It is not an audit and not a full cap table: holders who never reached 5% are not listed, and a stake can change after its latest filing.
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| Filed | Person | Role | Change | Effective |
|---|---|---|---|---|
| Form 8-K, 2026-10-29 | David E. Constable | Director | appointed | 2027-03-01 |
Which insiders own Marathon Petroleum Corp shares?
Directors, officers and holders of 10% or more report their shares on Forms 3, 4 and 5. Each line is the latest such report, largest holding first.
- , the chairman and a director: 220,902 shares (0.08% of shares outstanding) (Form 4, 2025-12-16).
- , the chairman and chief executive: 110,939 shares (0.04% of shares outstanding) (Form 4, 2026-08-04).
- , a director: 73,000.89 shares (0.03% of shares outstanding) (Form 4, 2026-05-04).
- , a director: 70,900.9 shares (0.03% of shares outstanding), 60,900.9 held directly and 10,000 indirectly (Form 4, 2026-05-04).
- , the executive vice president and chief fin ofc: 35,457 shares (0.01% of shares outstanding) (Form 4, 2025-03-04).
Shares outstanding: 272,282,280 as of 2026-10-29, from the company's latest SEC cover page.
How much has Marathon Petroleum Corp raised?
No fundraising or offering filing from Marathon Petroleum Corp is on file with us.
Keep reading
More on Marathon Petroleum Corp and the records around it.
Companies that share a holder
- Vanguard Portfolio Management also filed stake reports on 941 other companies: A10 Networks Inc (Oct 2026), ADT Inc (Oct 2026), Appian Corp (Oct 2026)
- Vanguard Capital Management also filed stake reports on 1495 other companies: A10 Networks Inc (Oct 2026), Altisource Portfolio Solutions SA (Oct 2026), Alto Neuroscience Inc (Oct 2026)
- BlackRock, Inc. also filed stake reports on 1586 other companies: 908 Devices Inc. (Oct 2026), ACRES COMMERCIAL REALTY CORP (Oct 2026), Allogene Therapeutics, Inc (Oct 2026)
Related pages
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