FINDLAY, Ohio, Nov. 4, 2025 /PRNewswire/ -- Marathon Petroleum Corp. (NYSE: MPC) today announced that the board of directors of MPC has elected Maryann T. Mannen, president and chief executive officer and member of the board of directors, as chairman of the board, effective Jan. 1, 2026....
Marathon Petroleum Corp. Elects Maryann T. Mannen as Chairman of the Board
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