MPLX - Marathon Petroleum President Mannen to assume CEO role; Hennigan to become Chairman May, 13 2024 05:15 PM MPLX LP Representing Limited Partner Interests 2024-05-13 17:15:46 ET More on Marathon Petroleum Marathon Petroleum: The Buyback King Of The Energy Sector Continues To Shine Marathon Petroleum: Still Has Gas In The Tank After 100% Returns Marathon Petroleum: Share Repurchases Continue To Generate Value (Downgrade) For further details see: Marathon Petroleum President Mannen to assume CEO role; Hennigan to become Chairman