Michael J. Hennigan - 12 Dec 2025 Form 4 Insider Report for MPLX LP (MPLX)

Reporting relationship: Executive Chairman, Director
Issuer ticker: MPLX
Reported as of: 12 Dec 2025
Net transaction value: -$73,225
SEC form: 4
Accepted by SEC: 16 Dec 2025, 15:28:19 UTC
Prior SEC filing: 03 Jun 2025
Next SEC filing: 24 Apr 2026
Source filing: View source filing
Reporting owner signature: /s/ Molly R. Benson, Attorney-in-Fact for Michael J. Hennigan

Key filing fact

Michael J. Hennigan filed Form 4 for MPLX LP (MPLX) on 16 Dec 2025.

Key facts

This page summarizes Michael J. Hennigan's Form 4 filing for MPLX LP (MPLX).
1 reported transaction and 0 derivative rows are listed below.
Accepted by SEC: 16 Dec 2025, 15:28.

Change

Previous filing in this sequence was filed on 03 Jun 2025.
Current net transaction value: -$73,225.

Research use

This tells you what this filing adds before you inspect full transaction and derivative tables.
You can trace every row back to the original SEC filing document.

Evidence

Filed on Form 4

Ownership activity is grounded in SEC Form 4 disclosures.

View source filing

Reporting Owners (1)

CIK 0001352283 Primary reporting owner

Hennigan Michael J

Relationship: Executive Chairman, Director
Address: C/O MPLX LP, 200 E. HARDIN STREET, FINDLAY
Signature: /s/ Molly R. Benson, Attorney-in-Fact for Michael J. Hennigan
Signature date: 16 Dec 2025

Reported non-derivative transactions

Shares, units, or other non-derivative securities reported in this filing.

MPLX transaction

Common Units (Limited Partner Interests)

Tax liability

Transaction value: $73,225
Shares: -1,335
Change %: -0.37%
Price: $54.85
Shares after: 359,137
Date: 12 Dec 2025
Ownership: Direct

^* marks a reported price that did not pass the local price check.

Additional SEC filing notes

Filing notes and footnotes

SEC remarks

The Reporting Person is Executive Chairman of the Board of Directors of MPLX GP LLC, the general partner of the Issuer. The Issuer is managed by the directors and executive officers of MPLX GP LLC.