MPLX LP filed an 8-K on October 29, 2026, announcing the election of Micheal G. Dunn and Bruce L. Niemeyer to the board of directors of MPLX GP LLC, the general partner of MPLX, both effective November 1, 2026.

Key Highlights

  • Two new directors elected: Micheal G. Dunn and Bruce L. Niemeyer were elected to the board of MPLX GP LLC, both effective November 1, 2026.
  • Board size reaches 12: The additions bring the total number of MPLX board directors to 12.
  • Dunn's background: Dunn brings over 35 years of experience in the natural gas and midstream industries and most recently served as executive vice president and chief operating officer of The Williams Companies, retiring in 2025.
  • Niemeyer's background: Niemeyer's career spans more than 40 years in the energy industry, with prior roles including President, Americas Exploration and Production at Chevron.
  • GIP-designated director: Dunn currently serves as a GIP-designated director on the Columbia Pipelines Holding Company board, according to the filing.

MPLX GP LLC Board Expanded With Two Industry Veterans

According to the filing, MPLX LP (NYSE:MPLX), headquartered in Findlay, Ohio, announced on October 29, 2026, 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 appointments are effective November 1, 2026, and bring the total board membership to 12 directors.

The filing describes Dunn as having over 35 years of experience in the natural gas and midstream industries, with leadership roles spanning operations, engineering, construction, project management, and information technology. He most recently served as executive vice president and chief operating officer of The Williams Companies before retiring in 2025. He previously served as president of Kern River Gas and PacifiCorp Energy, and as president and executive vice president of Questar Pipeline/Questar Corporation. The filing notes Dunn also serves as a GIP-designated director on the Columbia Pipelines Holding Company board and is a past director of Williams Partners LP. He holds a Bachelor of Science in Civil Engineering from the University of Oklahoma.

Niemeyer is described in the filing as having more than 40 years in the energy industry, with experience spanning exploration and production. At Chevron, he served as President, Americas Exploration and Production, and as Corporate Vice President, Strategy and Sustainability. He began his career at Atlantic Richfield, where he held several leadership positions including President of ARCO Environmental Remediation, LLC. Niemeyer holds a Bachelor of Science in Petroleum Engineering from the Colorado School of Mines. MPLX Chairman, President and CEO Maryann Mannen and lead director Christopher Helms both provided quoted commentary welcoming the appointments, as included in the filing.

What Was Disclosed

MPLX LP disclosed the election of two new directors, Micheal G. Dunn and Bruce L. Niemeyer, to the board of its general partner, MPLX GP LLC, both effective November 1, 2026, expanding the board to 12 members.