Ameriprise Financial Reduces Marathon Petroleum Stake

Institutional investor sells over 500,000 shares of oil and gas company

Mar. 16, 2026 at 7:23am

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Ameriprise Financial Inc., a major institutional investor, has reduced its position in Marathon Petroleum Corporation (NYSE: MPC) by selling 537,272 shares in the third quarter. The firm now owns approximately 2.2 million shares, or about 0.75% of the oil and gas company's stock.

Why it matters

This sale by a prominent institutional investor could signal a shift in sentiment around Marathon Petroleum, which has seen its stock price rise significantly over the past year. The move may indicate concerns about the company's future performance or a broader repositioning of Ameriprise's portfolio.

The details

According to a filing with the Securities and Exchange Commission, Ameriprise Financial sold the 537,272 shares of Marathon Petroleum, reducing its total stake in the company by 19.3%. The institutional investor now holds 2,244,349 shares, worth an estimated $432.6 million as of the most recent filing.

  • Ameriprise Financial sold the shares in the third quarter of the year.

The players

Ameriprise Financial Inc.

A major institutional investor and financial services firm that manages over $1 trillion in assets.

Marathon Petroleum Corporation

A leading U.S. oil refining and marketing company.

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The takeaway

This sale by a prominent investor like Ameriprise Financial could signal a shift in market sentiment around Marathon Petroleum, though the reasons behind the move are not entirely clear. Investors will likely be watching closely to see if other major institutions follow suit or if Marathon Petroleum can maintain its recent stock price momentum.