8-KLeadership Changes

MPLX LP 8-K Report, Executive Changes (Dec 18, 2025)

Filed December 18, 2025For Securities:MPLXMPLXP

Summary

MPLX LP announced a change to the General Partner's Board of Directors, effective January 19, 2026. Maria A. Khoury has been elected as a new director. Ms. Khoury's appointment is directly linked to her upcoming role as Executive Vice President and Chief Financial Officer at Marathon Petroleum Corporation (MPC), the General Partner's owner and a majority unitholder of MPLX. Her directorship is a management role stemming from her MPC position and she will not receive separate compensation for board service. This appointment coincides with the departure of John J. Quaid from the Board. The total number of directors on the Board will remain at ten. Investors should note that Ms. Khoury's background as CFO of MPC brings financial expertise to the Board, which could influence strategic decisions related to MPLX's operations and capital allocation, particularly given MPC's significant ownership stake.

Key Highlights

  • 1MPLX LP's General Partner Board of Directors to add Maria A. Khoury, effective January 19, 2026.
  • 2Ms. Khoury's appointment is tied to her new role as EVP and CFO of Marathon Petroleum Corporation (MPC).
  • 3Ms. Khoury will serve as a management director due to her position at MPC.
  • 4No separate compensation will be provided to Ms. Khoury for her board service.
  • 5John J. Quaid will depart from the Board on the same effective date.
  • 6The size of the Board of Directors will remain at ten members.
  • 7No disclosable arrangements, understandings, family relationships, or direct/indirect interests exist for Ms. Khoury concerning her election.

Frequently Asked Questions

Maria A. Khoury is being elected to the MPLX General Partner's Board of Directors to fill a management director position. Her appointment is effective January 19, 2026, coinciding with her start date as Executive Vice President and Chief Financial Officer at Marathon Petroleum Corporation (MPC), the parent company of MPLX's General Partner and a majority unitholder.

No, Ms. Khoury will not receive separate compensation for her services as a member of the Board. As she will be an employee of MPC, her board position is considered part of her role within the MPC organization.

The filing explicitly states that there are no arrangements or understandings for her election other than her employment with MPC. There are no reported family relationships with existing directors or officers, and she has no direct or indirect interest in any transaction requiring disclosure under Item 404(a) of Regulation S-K.

John J. Quaid is a departing member of the MPLX General Partner's Board of Directors. He will cease his service on January 19, 2026, the same date Ms. Khoury's appointment becomes effective. The filing does not specify the reasons for Mr. Quaid's departure.