Welcome to our dedicated page for Mplx Lp SEC filings (Ticker: MPLX), a comprehensive resource for investors and traders seeking official regulatory documents including 10-K annual reports, 10-Q quarterly earnings, 8-K material events, and insider trading forms.
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MPLX LP announced a leadership transition. The board elected Maryann T. Mannen, currently President and Chief Executive Officer and a director of MPLX GP LLC, as Chairman of the Board effective January 1, 2026. She will add the Chairman role to her existing responsibilities.
Michael J. Hennigan notified the Partnership of his retirement as Executive Chairman and as a director of MPLX GP, also effective January 1, 2026. With his retirement, the board size will be reduced to 10 directors as of the effective date. The Partnership issued a press release on November 4, 2025, detailing these changes.
MPLX LP reported stronger Q3 results and executed several portfolio moves. For the quarter ended September 30, 2025, total revenues and other income were $3,619 million, up from $2,972 million a year ago, and net income was $1,555 million versus $1,047 million. Limited partners’ net income was $1,545 million, or $1.52 per common unit (basic and diluted). For the nine months, revenues were $9,746 million and net income was $3,749 million.
MPLX acquired Northwind Midstream for $2.4 billion in cash, financed with $4.5 billion senior notes issued in August 2025. It also bought the remaining 55% of BANGL for $703 million cash plus an earnout of up to $275 million, recognizing a $484 million gain on remeasurement. The company agreed to divest its Rockies operations for $1.0 billion, with an estimated gain in excess of $150 million upon closing.
Cash from operations reached $4,413 million year‑to‑date; cash was $1,765 million and total debt was $26,007 million at quarter‑end. MPLX repurchased $300 million of units year‑to‑date and had $1.2 billion remaining under authorizations. A Q3 cash distribution of $1.0765 per unit ($1,095 million total) was declared, payable on November 14, 2025.
MPLX LP reported that it furnished a press release announcing financial results for the quarter ended September 30, 2025. The release is attached as Exhibit 99.1 and incorporated by reference.
The information was provided under Item 2.02 and, along with Exhibit 99.1, is designated as “furnished” and not deemed “filed” under the Exchange Act. MPLX’s common units trade on the NYSE under the symbol MPLX.
Insider acquisition recorded: On 08/25/2025 Ray N. Walker Jr., a director of MPLX GP LLC (the general partner of MPLX LP), was reported acquiring 1,677.632 common units of MPLX at a stated price of $0. Following the transaction, he beneficially owns 1,677.632 units. The filing is signed by an attorney-in-fact on behalf of Mr. Walker.
John P. Surma, reported as a director of MPLX GP LLC (the general partner of MPLX LP), executed a transaction on 08/15/2025 acquiring 1,475.301 common units (limited partner interests). The form reports a price of $0 for the transaction and shows 86,095.058 common units beneficially owned following the reported transaction. The filing was signed by an attorney-in-fact, Molly R. Benson, on 08/19/2025.
Director J. Michael Stice reported an acquisition of MPLX common units. On 08/15/2025 he acquired 962.494 common units at a reported price of $0, increasing his total beneficial ownership to 51,275.827 common units. The filing shows 700 units held indirectly by The Mike Stice Trust. The reporting person is a director of MPLX GP LLC, the issuer's general partner.
Frank M. Semple, a director of MPLX GP LLC, reported a transaction in MPLX common units on 08/15/2025. The filing shows an acquisition of 1,050.574 common units at a reported price of $0, and indicates 55,968.214 common units beneficially owned following the transaction as direct holdings. Additional indirect holdings are reported: 333,337 units through Frank M Semple Revocable Trust, 111,180 through Robin Y Semple 2012 Dynasty Trust, and 48,777 through EK Holdings LLC. The form is signed by an attorney-in-fact on behalf of Mr. Semple.
Garry L. Peiffer, a director of MPLX GP LLC (the general partner of MPLX LP), reported an acquisition of 1,157.128 common units of MPLX on 08/15/2025. The reported transaction lists a price of $0. After the transaction, the filing shows 61,644.675 common units beneficially owned directly and 68,497 beneficially owned indirectly by the Garry L. Peiffer Revocable Trust. The Form 4 was signed by an attorney-in-fact on 08/19/2025.
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