Form 8-K
8-K — MPLX LP
Accession: 0001552000-26-000040
Filed: 2026-10-29
Period: 2026-10-27
CIK: 0001552000
SIC: 4610 (PIPE LINES (NO NATURAL GAS))
Item: Departure of Directors or Certain Officers; Election of Directors; Appointment of Certain Officers: Compensatory Arrangements of Certain Officers
Item: Other Events
Item: Financial Statements and Exhibits
Documents
8-K — mplx-20261027.htm (Primary)
EX-99.1 (mplx-exx991.htm)
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8-K
8-K (Primary)
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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) October 27, 2026
_____________________________________________
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 October 27, 2026, the board of managers of MPC Investment LLC, the sole member of MPLX GP LLC, the general partner (the “General Partner”), of MPLX LP (the “Partnership”), increased the size of the board of directors of the General Partner (the “Board”) to twelve members and elected Micheal G. Dunn and Bruce L. Niemeyer to serve on the Board as directors, effective November 1, 2026. Mr. Dunn and Mr. Niemeyer were each appointed to serve on the Board's Audit Committee and Conflicts Committee, effective November 1, 2026.
As non-management directors, Mr. Dunn and Mr. Niemeyer will receive compensation in the same manner as the Board’s other non-management directors. The terms of non-management director compensation were disclosed in the Partnership’s Annual Report on Form 10-K for the year ended December 31, 2025, filed with the Securities and Exchange Commission on February 26, 2026.
Item 8.01 Other Events.
On October 29, 2026, the Partnership issued a press release announcing the changes reported above. A copy of the press release is attached as Exhibit 99.1 to this Current Report on Form 8-K.
Item 9.01 Financial Statements and Exhibits.
(d) Exhibits.
Exhibit Number
Description
99.1
Press release issued by MPLX LP on October 29, 2026
104 Cover Page Interactive Data File (embedded within the Inline XBRL document)
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: October 29, 2026 By: /s/ Molly R. Benson
Name: Molly R. Benson
Title: Chief Legal Officer and Corporate Secretary
EX-99.1
EX-99.1
Filename: mplx-exx991.htm · Sequence: 2
Document
Exhibit 99.1
MPLX LP announces election of two new directors
FINDLAY, Ohio, Oct. 29, 2026 – MPLX LP (NYSE: MPLX) today announced that Micheal G. Dunn and Bruce L. Niemeyer have been elected to the board of directors of MPLX GP LLC, the general partner of MPLX, both effective Nov. 1, 2026.
Dunn brings over 35 years of experience in the natural gas and midstream industries, including leadership roles in operations, engineering, construction, project-management and information technology. Most recently, Dunn served as executive vice president and chief operating officer of The Williams Companies, from which he retired in 2025. He previously served as president of Kern River Gas and PacifiCorp Energy, and president and executive vice president of Questar Pipeline/Questar Corporation.
Dunn is a GIP-designated director on the Columbia Pipelines Holding Company board and is a past director of Williams Partners LP. He earned a Bachelor of Science in Civil Engineering from the University of Oklahoma.
Niemeyer’s career spans more than 40 years in the energy industry, including a variety of leadership roles in exploration and production. At Chevron, Niemeyer was previously responsible for its Western Hemisphere upstream business as President, Americas Exploration and Production, and before that served as its Corporate Vice President, Strategy and Sustainability. He began his career at Atlantic Richfield, where he held a series of leadership positions, including serving as President of ARCO Environmental Remediation, LLC.
Niemeyer earned a Bachelor of Science in Petroleum Engineering from the Colorado School of Mines.
“Micheal and Bruce bring an extraordinary breadth of expertise to MPLX’s board,” said MPLX Chairman, President and CEO Maryann Mannen. “Their respective experiences and expertise will be invaluable as we execute growth strategies across our value chains to meet growing demand.”
The addition of Niemeyer and Dunn brings the MPLX board to 12 directors.
“It’s a pleasure to welcome these two leaders to MPLX’s board of directors,” said Christopher Helms, MPLX lead director. “Their insights and strategic acumen will be a great fit for the partnership as we continue creating long-term value for unitholders.”
###
About MPLX LP
MPLX is a diversified, large-cap master limited partnership that owns and operates midstream energy infrastructure and logistics assets and provides fuels distribution services. MPLX's assets include a network of crude oil and refined product pipelines; an inland marine business; light-product terminals; storage caverns; refinery tanks, docks, loading racks, and associated piping; and crude and light-product marine terminals. The company also owns crude oil and natural gas gathering systems and pipelines as well as natural gas and NGL processing and fractionation facilities in key U.S. supply basins. More information is available at www.MPLX.com.
Investor Relations Contacts: (419) 421-2071
Brian Worthington, Vice President, Investor Relations
Isaac Feeney, Director, Investor Relations
Evan Heminger, Analyst, Investor Relations
Media Contact: (419) 421-3577
Jamal Kheiry, Communications Director
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