US Refinery Stocks Surge 6 Trillion Won in One Day, Attracting Buying Interest

On June 16, shares of Marathon Petroleum Corp. (MPC) closed at $264.35 on the New York Stock Exchange, up 5.38% for the day. The company’s market capitalization reached approximately $77.1 billion, with a one-day gain of about $4.3 billion. Trading volume was 1,368,275 shares.

Despite concerns over narrowing refining margins, recent Wall Street reports have generally maintained overweight and buy ratings on MPC, highlighting its inclusion in major indices and its strong standing in sustainability benchmarks.

In its first-quarter earnings release, MPC reported profits that exceeded market expectations and announced a new $5 billion share-repurchase program alongside a dividend increase, underscoring its commitment to shareholder returns.

Institutional investors have also rebalanced their portfolios—some sharply reducing their MPC holdings while others expanded theirs by several hundred percent during the fourth quarter—resulting in a pronounced divergence in demand.

Headquartered in Findlay, Ohio, Marathon Petroleum is one of the largest independent refiners and petroleum-product distributors in the U.S., with roughly 3 million barrels per day of refining capacity. Through its extensive domestic retail network and pipeline subsidiaries, it generates stable cash flow, and following the sale of Speedway it has continued to attract investors with a shareholder-return strategy that combines consistent dividends with significant stock buybacks.