Marathon Petroleum Appoints New Chairman of the Board

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Mannen, its President and Chief Executive Officer, has been elected by the board of directors as the new Chairman of the Board, effective January 1, 2026. Mannen will succeed Michael J. Hennigan, who is retiring as Executive Chairman. The company also issued a press release on the same day to inform the public of these changes. An exhibit with the press release is attached to the filing.

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About Marathon Petroleum Corp.

Marathon Petroleum Corp. is a leading integrated downstream energy company within the United States. Its primary function is to refine crude oil and distribute petroleum products, playing a pivotal role in the energy sector. Marathon Petroleum operates one of the largest refining systems in the nation, with refineries strategically located across the country, providing widespread access to key markets. The company is known for producing a variety of petroleum products, including gasoline, diesel, aviation fuels, and petrochemicals, which are essential to various sectors such as transportation, industrial, and residential markets. Marathon Petrol's comprehensive logistics network, including pipelines, terminals, and marine fleets, supports its extensive distribution capabilities. Moreover, its retail operations through the Speedway brand further enhance its market presence. Marathon Petroleum Corp. is significant in the energy market, contributing to the stability and efficiency of fuel supply and consumption patterns, thus impacting both local and national economic landscapes.