Filing Details
STATE STREET CORP, a registered investment adviser, reduced its position in Marathon Petroleum Corporation (NYSE:MPC) during Q3 2026, according to its most recent 13F filing with the Securities and Exchange Commission.
The firm sold 1,932,858 shares of the Energy company, reducing its total holdings to 16,539,047 shares valued at approximately $6.5B as of the filing date. This represents a 10.5% decrease in the position.
Market Context
Marathon Petroleum Corporation's stock currently trades at $409.65 with a market capitalization of $56.2B.
Institutional selling doesn't always signal a bearish outlook. Large funds regularly trim positions for portfolio rebalancing, client redemptions, or to lock in gains. That said, when a major holder like STATE STREET CORP reduces exposure to Marathon Petroleum Corporation, it's worth monitoring whether other institutions are making similar moves.
Energy stocks remain a focus for institutional investors navigating the transition between traditional and renewable energy sources. Institutional positioning in Marathon Petroleum Corporation reflects views on commodity prices and the sector's evolving landscape.
The size of this position — $6.54 billion — places it among the more significant institutional holdings in Marathon Petroleum Corporation. Large positions like this can influence trading dynamics and are closely watched by market participants tracking smart money flows.
Investors should note that 13F filings reflect holdings as of the end of the reporting quarter and are filed up to 45 days later. The position may have changed since the filing date. 13F data is most useful when analyzed alongside other signals such as insider transactions, analyst ratings, and fundamental trends.
Related Tools: Insider Trades Tracker | View MPC Stock Page
Frequently Asked Questions
What is a 13F filing?
A 13F filing is a quarterly SEC report required for institutional managers with over $100 million in assets. It discloses equity holdings, providing transparency into how firms like STATE STREET CORP position their portfolios.
How can I track institutional ownership of MPC?
View all institutional holders on our MPC institutional ownership page.