MPLX LP filed a current report on October 29, 2026, disclosing that its general partner's board of directors was expanded to twelve members and that Micheal G. Dunn and Bruce L. Niemeyer were elected as directors effective November 1, 2026.

Key Highlights

  • Board expanded: The board of directors of MPLX GP LLC was increased in size to twelve members.
  • Two new directors elected: Micheal G. Dunn and Bruce L. Niemeyer were elected to serve on the board, effective November 1, 2026.
  • Committee appointments: Both Dunn and Niemeyer were appointed to the Board's Audit Committee and Conflicts Committee, also effective November 1, 2026.
  • Non-management compensation: Dunn and Niemeyer will receive compensation in the same manner as other non-management directors, with terms previously disclosed in the Partnership's Annual Report for the year ended December 31, 2025.
  • Press release issued: The Partnership issued a press release on October 29, 2026, announcing the governance changes.

Board Governance Changes at MPLX LP's General Partner

According to the filing, the board of managers of MPC Investment LLC, which serves as the sole member of MPLX GP LLC, the general partner of MPLX LP (NYSE:MPLX), took action on October 27, 2026, to increase the size of the general partner's board of directors from its prior level to twelve members. MPLX LP is a Delaware limited partnership headquartered at 200 E. Hardin Street, Findlay, Ohio, whose common units representing limited partnership interests are listed on the New York Stock Exchange.

The filing discloses that Micheal G. Dunn and Bruce L. Niemeyer were each elected to the board in connection with this expansion, with their service commencing on November 1, 2026. In addition to their board seats, both individuals were simultaneously appointed to serve on two standing committees: the Audit Committee and the Conflicts Committee. The Conflicts Committee is a governance body relevant to a publicly traded partnership structure, where potential conflicts of interest between the general partner and limited partners may require independent review.

As non-management directors, the filing states that Dunn and Niemeyer will be compensated in the same manner as the board's other non-management directors. The filing notes that the applicable compensation terms were previously set out in the Partnership's Annual Report for the fiscal year ended December 31, 2025, which was filed with the Securities and Exchange Commission on February 26, 2026. The current report was signed by Molly R. Benson, Chief Legal Officer and Corporate Secretary of MPLX GP LLC.

What Was Disclosed

MPLX LP reported the expansion of its general partner's board to twelve members and the election of Micheal G. Dunn and Bruce L. Niemeyer as directors, effective November 1, 2026, along with their concurrent appointment to the Audit Committee and Conflicts Committee.