MPLX (NYSE: MPLX) adds Maria A. Khoury to general partner board

Rhea-AI Filing Summary

MPLX LP reported a leadership change at its general partner. On December 18, 2025, the sole member of MPLX GP LLC’s Board of Directors elected Maria A. Khoury to serve on the General Partner’s Board, effective January 19, 2026. She is not expected to serve on any standing committees.

On the same effective date, Ms. Khoury will join Marathon Petroleum Corporation, which owns the General Partner and a majority of MPLX LP’s common units, as Executive Vice President and Chief Financial Officer. As an MPC employee, she will serve as a management director on the Board and will not receive separate compensation for her board service.

The company states there are no special arrangements or family relationships related to her election and no related-party transactions requiring disclosure. Ms. Khoury will succeed John J. Quaid, who will cease serving as a director on the effective date, while the Board size remains set at ten directors.

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UNITED STATES

SECURITIES AND EXCHANGE COMMISSION

Washington, D.C. 20549

_____________________________________________

FORM 8-K

_____________________________________________

CURRENT REPORT

Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934

Date of Report (Date of earliest event reported) December 12, 2025

 _____________________________________________

MPLX LP

(Exact name of registrant as specified in its charter)

_____________________________________________

Delaware

001-35714

27-0005456

(State or other jurisdiction of incorporation)

(Commission File Number)

(IRS Employer Identification No.)

200 E. Hardin Street, Findlay, Ohio 45840

(Address of principal executive offices) (Zip code)

Registrant’s telephone number, including area code: (419) 422-2121

_____________________________________________

Check the appropriate box below if the Form 8-K filing is intended to simultaneously satisfy the filing obligation of the registrant under any of the following provisions: 

☐			Written communications pursuant to Rule 425 under the Securities Act (17 CFR 230.425)
☐			Soliciting material pursuant to Rule 14a-12 under the Exchange Act (17 CFR 240.14a-12)
☐			Pre-commencement communications pursuant to Rule 14d-2(b) under the Exchange Act (17 CFR 240.14d-2(b))
☐			Pre-commencement communications pursuant to Rule 13e-4(c) under the Exchange Act (17 CFR 240.13e-4(c))

Securities registered pursuant to Section 12(b) of the Act:
Title of each class			Trading symbol(s)			Name of each exchange on which registered
Common Units Representing Limited Partnership Interests			MPLX			New York Stock Exchange

Indicate by check mark whether the registrant is an emerging growth company as defined in Rule 405 of the Securities Act of 1933 (§230.405 of this chapter) or Rule 12b-2 of the Securities Exchange Act of 1934 (§240.12b-2 of this chapter).

Emerging growth company ☐

If an emerging growth company, indicate by check mark if the registrant has elected not to use the extended transition period for complying with any new or revised financial accounting standards provided pursuant to Section 13(a) of the Exchange Act.

☐

Item 5.02 Departure of Directors or Certain Officers; Election of Directors; Appointment of Certain Officers; Compensatory Arrangements of Certain Officers.

On December 18, 2025, the sole member of MPLX GP LLC (the “General Partner”), the general partner of MPLX LP (the “Partnership”), elected Maria A. Khoury to serve as a member of the General Partner’s Board of Directors (the “Board”), effective January 19, 2026 (the “Effective Date”). Ms. Khoury is not expected to serve on any standing committees of the Board.

Ms. Khoury will join Marathon Petroleum Corporation (“MPC”), which owns the General Partner and a majority of the Partnership’s outstanding common units, as its Executive Vice President and Chief Financial Officer on the Effective Date. As an employee of MPC, Ms. Khoury will serve as a management director for the General Partner and will not receive compensation for her services as a member of the Board.

Other than with respect to the employment relationship disclosed above, there are no arrangements or understandings between Ms. Khoury and any other persons pursuant to which Ms. Khoury was elected to the Board. There are no family relationships between Ms. Khoury and any director or executive officer of the Partnership, and Ms. Khoury has no direct or indirect interest in any transaction or proposed transaction required to be disclosed pursuant to Item 404(a) of Regulation S-K.

Ms. Khoury will succeed John J. Quaid, who will cease service as a member of the Board on the Effective Date. The size of the Board will remain set at ten directors.

SIGNATURES

Pursuant to the requirements of the Securities Exchange Act of 1934, the registrant has duly caused this report to be signed on its behalf by the undersigned hereunto duly authorized.

			MPLX LP
			By:						MPLX GP LLC, its General Partner
Date: December 18, 2025			By:						/s/ Molly R. Benson
									Name: Molly R. Benson
									Title: Chief Legal Officer and Corporate Secretary

FAQ

What board change did MPLX (MPLX) announce in this report?

MPLX LP disclosed that the sole member of MPLX GP LLC, its general partner, elected Maria A. Khoury to serve as a member of the General Partner’s Board of Directors, effective January 19, 2026.

When does Maria A. Khoury’s role at MPLX’s general partner become effective?

The filing states that Maria A. Khoury’s appointment to the General Partner’s Board of Directors becomes effective on January 19, 2026, referred to as the Effective Date.

What position will Maria A. Khoury hold at Marathon Petroleum related to MPLX?

On the Effective Date, Maria A. Khoury will join Marathon Petroleum Corporation, which owns MPLX’s General Partner and a majority of its common units, as Executive Vice President and Chief Financial Officer.

Will Maria A. Khoury receive separate compensation for serving on MPLX’s general partner board?

No. The company states that, as an employee of Marathon Petroleum Corporation, Ms. Khoury will serve as a management director for the General Partner and will not receive compensation for her services as a member of the Board.

Does MPLX report any related-party or family relationships involving Maria A. Khoury?

The disclosure notes there are no arrangements or understandings with other persons related to her election, no family relationships between Ms. Khoury and any director or executive officer of the Partnership, and no transactions requiring disclosure under Item 404(a) of Regulation S-K.

Who is Maria A. Khoury replacing on MPLX’s general partner board and does the board size change?

Maria A. Khoury will succeed John J. Quaid, who will cease serving as a member of the Board on the Effective Date. The company states that the size of the Board will remain set at ten directors.