Marathon Petroleum Corp. announced its leadership transition plan, with all positions effective August 1, 2024. At that time, MPC President Maryann T. Mannen will join the Board of Directors; Hennigan will transition from CEO to Executive Chairman of the Board; and, continuing as the Board's strong independent voice, MPC Chairman John Surma has been elected to serve as Lead Director.

Hennigan has led MPC as CEO since March 2020 and joined the Board of Directors in April 2020. Mannen has served as President since January of this year, after previously serving as Executive Vice President and Chief Financial Officer since January 2021. Surma became independent Chairman of the Board in April 2020, having served as a member of the Board since 2011.

During Hennigan's leadership as CEO, MPC's accomplishments include: Delivering on transformative strategic priorities to structurally lower cost, improve commercial performance and increase competitiveness of the company's portfolio; Strategic sale of the retail business, resulting in robust capital return program; Return of approximately $37 billion to MPC shareholders through dividends and share repurchases, for total shareholder return, with dividends reinvested, of 918% since March 2020; and Significant growth of the midstream business operated by subsidiary MPLX LP, including expansion in the Marcellus, Utica and Permian basins. Mannen was elected MPC President effective January 2024, having previously served as Executive Vice President and CFO since January 2021. She has also served as a member of the Board of Directors of the general partner of MPLX LP since February 2021.

Before joining MPC, Mannen served as Executive Vice President and Chief FinancialOfficer of TechnipFMC (a successor to FMC Technologies Inc.), a leading global engineering services and energy technology company, since 2017. She previously served as Executive Vice President and Chief Financial Officer of FMC Technologies Inc. since 2014, as Senior Vice President and Chief Financial Officer since 2011, and in various positions of increasing responsibility with FMC Technologies Inc. since 1986. Mannen also serves on the board of directors of Owens Corning, an insulation, roofing and fiberglass composites company.

Hennigan was elected MPC CEO effective March 2020. He has served as a member of the Board of Directors since April 2020. Hennigan has also served as Chairman of the Board of Directors of the general partner of MPLX LP since April 2020, as its CEO since November 2019 and as its President since June 2017.

Before joining the general partner of MPLX LP, Hennigan was President, Crude, NGL and Refined Products of the general partner of Energy Transfer Partners L.P. He was President and Chief Executive Officer of Sunoco Logistics Partners L.P. from 2012 to 2017, President and Chief Operating Officer beginning in 2010, and Vice President, Business Development, beginning in 2009. Hennigan also serves on the board of directors of Nutrien, a Canadian agricultural services company. Surma was elected Chairman of the MPC Board of Directors effective April 2020, after joining the Board in 2011.

He has also served as a member of the Board of Directors of the general partner of MPLX LP since October 2012. Surma retired as the Chief Executive Officer of United States Steel Corporation in September 2013 and as Executive Chairman in December 2013. Prior to joining U. S. Steel, Surma served in several executive positions with Marathon.

Surma also serves on the board of directors of Trane Technologies plc, a global climate innovator that designs, manufactures, sells and services solutions for heating, ventilation and air conditioning, transport refrigeration and custom refrigeration solutions, as well as the Board of Directors of Public Service Enterprise Group (PSEG), a diversified energy company.