Board and executive changes

On October 28, 2026, the Board of Directors (the “Board”) of Marathon Petroleum Corporation (the “Company”) increased the size of the Board to eleven members and elected David E. Constable as a director of the Company, with such increase in the size of the Board and election effective as of March 1, 2027. Mr. Constable was appointed to serve on the Board’s Compensation and Organization Development Committee and Sustainability and Public Policy Committee, also effective March 1, 2027. As a non-employee director, Mr. Constable will receive the same compensation as the Company’s other non-employee directors, as described in the Company’s definitive proxy statement on Schedule 14A, filed with the Securities and Exchange Commission on March 16, 2026.

The Board of Directors (the “Board”) of Expand Energy Corporation (the “Company”) has appointed Daniel E. Brown as the Company’s President and Chief Executive Officer, effective as of the commencement of his employment, which is anticipated to occur October 26, 2026 (the “Effective Date”). Mr. Brown, age 51, most recently served as President and Chief Executive Officer of Chord Energy Corporation from July 2024 until October 2026 and as Chief Executive Officer of Oasis Petroleum, Inc., Chord’s predecessor, from April 2021 until July 2024. Prior to that, he served in various roles of increasing responsibility at Anadarko Petroleum Corporation and its predecessor, Kerr-McGee Corporation, from 1998 until Anadarko was acquired by Occidental Petroleum Corporation, including as Executive Vice President, U.S.

On October 15, 2026, the Board of Directors (the “Board”) of Halliburton Company (“Halliburton”) appointed David C. Hernandez as a member of the Board to fill a vacancy. The size of the Board remains at 12 directors. Mr. Hernandez currently serves as President and Director of Hunt Consolidated, Inc. (“Hunt Consolidated”). Mr. Hernandez brings extensive C-suite leadership experience across energy and industrial businesses, including expertise in corporate strategy, capital allocation, financial oversight, enterprise risk management, regulatory compliance, and governance. Mr. Hernandez has served as President of Hunt Consolidated since 2025, and during 2019-2022. In addition, during 2023-2024 he served as Chairman and Managing Director of Hunt Consolidated. Prior to joining Hunt Consolidated, Mr. Hernandez served as Vice President of Tax for Electronic Data Systems. Mr.

On October 8, 2026, Sarah Grose was appointed as Vice President – Chief Accounting Officer of Expand Energy Corporation (the “Company”). Ms. Grose will now assume the duties as principal accounting officer, effective immediately. Marcel Teunissen, the Company’s current Executive Vice President and Chief Financial Officer, was previously performing the duties as principal accounting officer of the Company on an interim basis. Ms. Grose, 40, joined the Company in 2019 and has served in various accounting leadership roles of increasing responsibility. She most recently served as the Director – Corporate Accounting from 2021 to 2026. Ms. Grose holds a B.B.A. in Accounting and Finance and M.S. in Accounting from the University of Oklahoma and is a certified public accountant. In connection with her appointment as Vice President – Chief Accounting Officer of the Company, Ms.