MPLX elects two directors effective November 1, 2026
Both were appointed to the Audit and Conflicts Committees, with service effective November 1, 2026.
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Form Type
8-K
Rhea-AI Filing Summary
MPLX LP increased the board of directors of its general partner, MPLX GP LLC, to 12 members and elected Micheal G. Dunn and Bruce L. Niemeyer as directors, effective November 1, 2026. Dunn has over 35 years of experience in the natural gas and midstream industries and retired in 2025 as executive vice president and chief operating officer of The Williams Companies. Niemeyer’s career in the energy industry spans more than 40 years; at Chevron, he previously led its Western Hemisphere upstream business as President, Americas Exploration and Production. As non-management directors, both will receive compensation in the same manner as the board’s other non-management directors.
8-K Event Classification
3 items: 5.02, 8.01, 9.01
3 items
Item 5.02
Departure of Directors or Certain Officers; Election of Directors; Appointment of Certain Officers
Governance
Key personnel changes including departures, elections, or appointments of directors and executive officers.
Item 8.01
Other Events
Other
Voluntary disclosure of events the company deems important to shareholders but not covered by other items.
Item 9.01
Financial Statements and Exhibits
Exhibits
Financial statements, pro forma financial information, or exhibit attachments filed with this report.
Key Figures
Board size: 12 members
Directors elected: 2 directors
Natural gas and midstream experience: Over 35 years
+1 more
4 metrics
Board size
12 members
Board of directors of MPLX GP LLC
Directors elected
2 directors
Effective November 1, 2026
Natural gas and midstream experience
Over 35 years
Micheal G. Dunn
Energy industry experience
More than 40 years
Bruce L. Niemeyer
Key Terms
General Partner, Audit Committee, Conflicts Committee, master limited partnership, +1 more
5 terms
General Partner financial
"the general partner (the “General Partner”)"
A general partner is the person or firm that runs an investment partnership and legally represents it — they make the day-to-day decisions, choose which assets to buy or sell, and are responsible for the partnership’s obligations. Investors care because the general partner’s judgment, risk-taking and fee and profit-sharing arrangements determine both the potential returns and the level of exposure to losses; think of the GP as the ship’s captain whose skill and honesty shape the voyage’s outcome.
Audit Committee financial
"appointed to serve on the Board's Audit Committee"
A company's audit committee is a small group of board members who act like independent inspectors for the firm's finances, overseeing how financial reports are prepared, monitoring internal controls, and managing the relationship with external auditors. Investors care because a strong audit committee reduces the risk of accounting errors, fraud, or misleading statements, making financial statements more trustworthy and helping protect shareholder value.
Conflicts Committee financial
"appointed to serve on the Board's ... Conflicts Committee"
master limited partnership financial
"a diversified, large-cap master limited partnership"
A master limited partnership is a type of business structure that combines features of a corporation and a partnership, allowing it to raise money from investors while passing profits directly to them. Think of it as a shared ownership group that offers regular income, making it attractive to investors seeking steady cash flow. This structure is often used by companies involved in natural resources or energy, where consistent revenue is common.
midstream technical
"experience in the natural gas and midstream industries"
Midstream refers to the phase in the energy supply chain that involves the transportation, storage, and processing of oil and natural gas after extraction from the ground, but before they are refined into usable products. For investors, midstream companies are important because they often generate steady income through fees for moving and storing energy resources, making them a key link between resource producers and consumers.
FAQ
AI-generated questions and answers. How Rhea-AI works. Not financial advice.
Which committees will the new MPLX directors join?
Micheal G. Dunn and Bruce L. Niemeyer were each appointed to the Audit Committee and Conflicts Committee, effective November 1, 2026.
AI-generated analysis. How Rhea-AI works. Not financial advice.
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
_____________________________________________
(Exact name of registrant as specified in its charter)
_____________________________________________
| (State or other jurisdiction of incorporation) | (Commission File Number) | (IRS Employer Identification No.) | ||||||||||||
(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 | ||||||
| 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 | |||||||||||
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.”
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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