Mplx LP

Last updated September 27, 2026

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Organization details

Legal name: Mplx LP
Ownership: Public
Status: Active
Sector (GICS): Industrials
SIC code: 4610 — Pipe Lines (No Natural Gas)
Headquarters city: Findlay
Headquarters state / province: Ohio
Headquarters country: United States
Fiscal year end: December
Ticker symbol: MPLX
Primary stock exchange: NYSE

Identifiers

SEC CIK: 0001552000
EIN: 27-0005456
Wikidata ID: Q105965677

Board of directors

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Bruce L. Niemeyer · Director
Since 2026
Carl Kristopher Hagedorn · Director · Exec VP & Chief Fin Ofc
Since 2024
Christine S. Breves · Director
Since 2023
Christopher A. Helms · Director
Since 2023
Dan D. Sandman · Director
Since 2023
Frank M. Semple · Director
Since 2023
Garry L. Peiffer · Director
Since 2023
J. Michael Stice · Director
Since 2023
John J. Quaid · Director · Exec VP and CFO
Since 2023
John P. Surma · Director
Since 2023
Maria A. Khoury · Director
Since 2026
Maryann T. Mannen · Director · Chairman, President & CEO
Since 2023
Michael J. Hennigan · Director · Executive Chairman
Since 2023
Micheal G. Dunn · Director
Since 2026
Ray N. Walker Jr. · Director
Since 2025

Chief executives

Michael J. Hennigan · President & CEO

Dates unknown

Maryann T. Mannen · President & CEO

Dates unknown

Board connections

7 of this board's directors also sit on 12 other boards. 2 are in the same sector.

Shared director Other board Same sector

Marathon Petroleum Corporation
via Frank M. Semple, J. Michael Stice, John P. Surma, Maryann T. Mannen and Michael J. Hennigan
Kayne Anderson Energy Infrastructure Fund Inc.
via Michael J. Hennigan
Kosmos Energy Ltd.
via J. Michael Stice
Owens Corning Inc
via Maryann T. Mannen
Presidio Production Company
via Ray N. Walker Jr.
Prudential Financial Inc.
via Maryann T. Mannen
Public Service Enterprise Group Incorporated
via John P. Surma
RXO Inc. Same sector
via Christine S. Breves
Solaris Energy Infrastructure Inc. Same sector
via Ray N. Walker Jr.
Sylvamo Corporation
via Christine S. Breves
The Cigna Group
via Michael J. Hennigan
Trane Technologies plc
via John P. Surma

Insider trades

All notable trades →

From SEC Forms 4 and 5. Open-market purchases and sales are highlighted; grants, option exercises and shares withheld for tax are routine.

Bought, last 12 months: $0; 0 purchases by 0 insiders
Sold, last 12 months: $0; 0 sales by 0 insiders

Date	Insider	Transaction	Shares	Price	Value
Nov 1, 2026	Micheal G. Dunn Director	Grant or award	+1,277	—	—
Nov 1, 2026	Bruce L. Niemeyer Director	Grant or award	+1,277	—	—
Aug 14, 2026	Christine S. Breves Director	Grant or award	+219	—	—
Aug 14, 2026	Christopher A. Helms Director	Grant or award	+1,337	—	—
Aug 14, 2026	Frank M. Semple Director	Grant or award	+1,073	—	—
Aug 14, 2026	J. Michael Stice Director	Grant or award	+983	—	—
Aug 14, 2026	John P. Surma Director	Grant or award	+1,563	—	—
Aug 14, 2026	Ray N. Walker Jr. Director	Grant or award	+82	—	—
Aug 14, 2026	Garry L. Peiffer Director	Grant or award	+1,232	—	—
May 15, 2026	Ray N. Walker Jr. Director	Grant or award	+78	—	—
May 15, 2026	John P. Surma Director	Grant or award	+1,656	—	—
May 15, 2026	J. Michael Stice Director	Grant or award	+1,098	—	—
May 15, 2026	Frank M. Semple Director	Grant or award	+1,194	—	—
May 15, 2026	Garry L. Peiffer Director	Grant or award	+1,304	—	—
May 15, 2026	Christopher A. Helms Director	Grant or award	+1,415	—	—

Peers

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Questions about Mplx LP

Who is the CEO of Mplx LP?

Michael J. Hennigan is Mplx LP's President & CEO.

How many directors are on Mplx LP's board?

Mplx LP's board has 15 directors: Bruce L. Niemeyer, Carl Kristopher Hagedorn, Christine S. Breves, Christopher A. Helms, Dan D. Sandman, Frank M. Semple, Garry L. Peiffer, J. Michael Stice, John J. Quaid, John P. Surma and 5 others.

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