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.
The MPLX LP (NYSE: MPLX) SEC filings page on Stock Titan provides access to the partnership’s regulatory disclosures filed with the U.S. Securities and Exchange Commission. As a large-cap master limited partnership operating midstream energy infrastructure and logistics assets, MPLX uses its SEC filings to report financial results, describe segment performance, document governance changes, and outline material transactions and financing activities.
Key documents for MPLX include annual reports on Form 10-K and quarterly reports on Form 10-Q, which present detailed information on the Crude Oil and Products Logistics and Natural Gas and NGL Services segments, including pipeline and terminal throughput, gathering and processing volumes, and NGL fractionation activity. These reports also discuss non-GAAP measures such as adjusted EBITDA, distributable cash flow, adjusted free cash flow, and leverage ratio, along with reconciliations to the most directly comparable GAAP measures.
MPLX’s current reports on Form 8-K highlight specific events such as quarterly and year-to-date financial results, changes in the board of directors of its general partner, leadership appointments, securities offerings, and the filing of underwriting agreements and supplemental indentures related to senior notes. These filings also reference press releases that provide additional operational and financial context.
On Stock Titan, AI-powered tools can help interpret MPLX’s filings by summarizing lengthy documents, clarifying segment-level disclosures, and highlighting items related to capital structure, distributions, and governance. Users can quickly locate information on MPLX’s debt offerings, board changes, and reported financial metrics without reading every page of each filing. Real-time updates from EDGAR ensure that new 10-K, 10-Q, and 8-K filings, as well as exhibits such as underwriting agreements and indentures, are available as they are posted, supporting more efficient review of MPLX’s regulatory reporting history.
MPLX LP director Garry L. Peiffer reported acquiring additional common units of the master limited partnership. On 11/14/2025, he acquired 1,247.144 MPLX common units (limited partner interests) at a reported price of $0, suggesting these were likely granted rather than purchased in the open market. Following this transaction, he beneficially owns 62,891.819 common units in a direct capacity and an additional 68,497 common units indirectly through the Garry L. Peiffer Revocable Trust. The filing confirms this is an individual Form 4 for one reporting person in his capacity as a director of MPLX GP LLC, the general partner that manages MPLX LP.
MPLX LP
MPLX LP11/14/2025, the reporting person received 230.413 MPLX common units (limited partner interests) in an acquisition transaction reported at a price of $0 per unit, which suggests a grant rather than an open-market purchase. After this transaction, the director beneficially owns 11,619.354 MPLX common units, held directly. The director serves on the board of MPLX GP LLC, which is the general partner that manages MPLX LP through its directors and executive officers.
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.
MPLX LP director files initial ownership report showing no units held. Ray N. Walker Jr., a director of MPLX GP LLC, the general partner that manages MPLX LP, filed an initial insider ownership statement as of August 25, 2025. The filing reports beneficial ownership of 0 common units of MPLX LP, held directly. This is a routine regulatory disclosure of insider holdings and does not describe any purchase or sale transaction.
MPLX LP reported that, on August 25, 2025, the board of managers of MPC Investment LLC, the sole member of MPLX GP LLC, increased the size of the board of directors of the general partner to eleven members and elected Ray N. Walker, Jr. as a director, effective the same day. He is expected to serve on the audit committee and the conflicts committee, which oversee financial reporting and related-party or conflict‑sensitive matters.
As a non‑management director, Mr. Walker will receive compensation in the same manner as the partnership’s other non‑management directors, under terms previously described in MPLX LP’s Annual Report on Form 10‑K for the year ended December 31, 2024.
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.
FAQ
What is the current stock price of Mplx Lp (MPLX)?
What is the market cap of Mplx Lp (MPLX)?
