# Marathon Petroleum Corporation institutional investment

> Live situation record from CLSTR: https://clstr.news/situations/marathon-petroleum-corporation-institutional-investment
> Updated: 2026-08-22T08:25:27.000Z. Sources: 2. Developments: 2.

Institutional investors have adjusted their positions in Marathon Petroleum Corporation, according to recent Securities and Exchange Commission filings. 

During the second quarter, several entities made significant acquisitions, including BlackRock Inc., which acquired a position valued at over $6.6 billion, and the Bank of New York Mellon Corp, which purchased a stake worth approximately $1.03 billion. Other notable buyers included Heartland Bank & Trust Co and Asset One Wealth Management LLC. 

Currently, institutional investors and hedge funds hold approximately 76.77% of the company's stock. In terms of insider activity, senior vice president Shawn M. Lyon sold 2,500 shares in mid-August at an average price of $350 per share.

## Timeline

### 2026-08-22: Institutional investors acquire new stakes in several major corporations

Recent SEC filings reveal significant new stock positions by institutional investors in McCormick & Company, TXNM Energy, McKesson Corporation, and Markel Group Inc.

2 sources. https://clstr.news/cluster/mckesson-corporation-sees-increased-institutional-investment

### 2026-08-22: Marathon Petroleum Corporation sees significant institutional investment activity

Institutional investors, including BlackRock and State Street, have significantly adjusted their holdings in Marathon Petroleum Corporation following recent SEC filings.

2 sources. https://clstr.news/cluster/marathon-petroleum-corporation-sees-significant-institutional-investment-activity

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Cite as: Marathon Petroleum Corporation institutional investment. CLSTR, https://clstr.news/situations/marathon-petroleum-corporation-institutional-investment