Marathon Petroleum Corp. Elects Maryann T. Mannen as Chairman of the Board

Group 1 - Marathon Petroleum Corp. has elected Maryann T. Mannen as chairman of the board, effective January 1, 2026, succeeding Michael J. Hennigan, who will retire from the position [1][2] - Mannen has been with the company in various leadership roles, including CEO since August 2024, and she aims to build on the legacy of her predecessor [2] - The company operates the largest refining system in the United States and has a significant presence in the midstream energy sector through its partnership in MPLX LP [3] Group 2 - The board of directors expressed confidence in Mannen's leadership and acknowledged Hennigan's contributions to the company's value creation during his tenure [2] - The company has declared a quarterly dividend of $1.00 per share on common stock, indicating a commitment to returning value to shareholders [5]