Shawn M. Lyon - 01 Mar 2026 Form 4 Insider Report for MPLX LP (MPLX)

Reporting relationship: Senior VP, Log. & Storage
Issuer ticker: MPLX
Reported as of: 01 Mar 2026
Net transaction value: -$162,914
SEC form: 4
Accepted by SEC: 03 Mar 2026, 19:30:28 UTC
Prior SEC filing: 16 Dec 2025
Next SEC filing: 13 Mar 2026
Source filing: View source filing
Reporting owner signature: /s/ Molly R. Benson, Attorney-in-Fact for Shawn M. Lyon

Key filing fact

Shawn M. Lyon filed Form 4 for MPLX LP (MPLX) on 03 Mar 2026.

Key facts

This page summarizes Shawn M. Lyon's Form 4 filing for MPLX LP (MPLX).
4 reported transactions and 0 derivative rows are listed below.
Accepted by SEC: 03 Mar 2026, 19:30.

Change

Previous filing in this sequence was filed on 16 Dec 2025.
Current net transaction value: -$162,914.

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 0001948454 Primary reporting owner

Lyon Shawn M

Relationship: Senior VP, Log. & Storage
Address: C/O MPLX LP, 200 E. HARDIN STREET, FINDLAY
Signature: /s/ Molly R. Benson, Attorney-in-Fact for Shawn M. Lyon
Signature date: 03 Mar 2026

Reported non-derivative transactions

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

MPLX transaction

Common Units (Limited Partner Interests)

Award

Transaction value: $0
Shares: +5,986
Change %: +24%
Price: $0.000000
Shares after: 31,040
Date: 01 Mar 2026
Ownership: Direct

MPLX transaction

Common Units (Limited Partner Interests)

Tax liability

Transaction value: $54,482
Shares: -920
Change %: -3%
Price: $59.22
Shares after: 30,120
Date: 02 Mar 2026
Ownership: Direct

MPLX transaction

Common Units (Limited Partner Interests)

Tax liability

Transaction value: $61,174
Shares: -1,033
Change %: -3.4%
Price: $59.22
Shares after: 29,087
Date: 02 Mar 2026
Ownership: Direct

MPLX transaction

Common Units (Limited Partner Interests)

Tax liability

Transaction value: $47,258
Shares: -798
Change %: -2.7%
Price: $59.22
Shares after: 28,289
Date: 02 Mar 2026
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 Senior Vice President, Logistics and Storage of MPLX GP LLC, the general partner of the Issuer. The Issuer is managed by the directors and executive officers of MPLX GP LLC