Marathon Petroleum Corporation (MPC) Institutional Ownership & Insider Trading

1,941 institutions reported holding Marathon Petroleum Corporation shares in 13F filings for the quarter ended 2026-06-30, according to EquiReason's reading of their SEC filings. 17 insider trades on Form 4 since 2025-10-01.

Source: SEC EDGAR filings · figures as of 2026-06-30 · read by EquiReason

MPCMarathon Petroleum CorporationFollow MPC — free

Oil & Gas Refining & Marketing · Energy

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Market cap: 128.4B
P/E TTM: 15.7
Dividend yield: 0.9%
52-week: —
Next earnings: 3 Nov, in 10 days

Institutions · all 13F filers

quarter to 30 Jun 2026 · filers in both quarters

1,941 institutions held 78.0% of the shares. Across filers that reported both quarters, shares held changed -2.0%.

Largest moves, shares (millions)

Institutional flow by quarter

net shares added or trimmed, millions · filers in both quarters

Quarter	Holders	Shares held, M	Change	Increased	New	Decreased	Closed
Jun 26	1,941	219	-2.0%	510	113	591	71
Mar 26	1,869	219	+0.8%	444	289	553	73
Dec 25	1,638	223	-1.1%	432	91	475	126
Sep 25	1,614	222	-2.9%	360	145	503	45
Jun 25	1,536	231	+0.0%	412	100	499	86
Mar 25	1,517	228	-0.3%	375	89	534	78
Dec 24	1,497	232	-3.2%	341	46	548	146
Sep 24	1,525	235	-7.3%	389	60	504	127

Marathon Petroleum Corporation — questions

Who owns Marathon Petroleum Corporation stock?: 1,941 institutions reported Marathon Petroleum Corporation shares in 13F filings for the quarter ended 2026-06-30. The largest: BlackRock, Inc. (9.3%), VANGUARD CAPITAL MANAGEMENT LLC (6.8%), STATE STREET CORP (6.6%).
Are Marathon Petroleum Corporation insiders buying or selling?: 17 insider trades on Form 4 since 2025-10-01; the full list, with dates, people and plan status, is on this page.

Every figure on this page comes from Marathon Petroleum Corporation's own SEC filings — see them on SEC EDGAR. Price data is licensed and shown only inside the product.

How these figures are read: methodology · EquiReason.

Important information. Figures on this page are taken from filings submitted to the U.S. Securities and Exchange Commission (SEC) and processed automatically by EquiReason. They may contain errors, omissions or delays, and EquiReason makes no representation or warranty as to their accuracy, completeness or timeliness. Always verify figures against the original filing on SEC EDGAR before relying on them.

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