Garry L. Peiffer - Nov 14, 2025 Form 4 Insider Report for MPLX LP (MPLX)

Role
Director
Signature
/s/ Molly R. Benson, Attorney-in-Fact for Garry L. Peiffer
Stock symbol
MPLX
Transactions as of
Nov 14, 2025
Transactions value $
$0
Form type
4
Date filed
11/18/2025, 07:21 AM
Previous filing
Aug 19, 2025

Reporting Owners (1)

Name Relationship Address Signature Signature date CIK
Peiffer Garry L. Director C/O MPLX LP, 200 E. HARDIN STREET, FINDLAY /s/ Molly R. Benson, Attorney-in-Fact for Garry L. Peiffer 2025-11-18 0001521094

Transactions Table

Type Sym Class Transaction Value $ Shares Change % * Price $ Shares After Date Ownership Footnotes
transaction MPLX Common Units (Limited Partner Interests) Award $0 +1.25K +2.02% $0.00 62.9K Nov 14, 2025 Direct
holding MPLX Common Units (Limited Partner Interests) 68.5K Nov 14, 2025 By Revocable Trust F1
* An asterisk sign (*) next to the price indicates that the price is likely invalid.

Explanation of Responses:

Id Content
F1 By Garry L. Peiffer Revocable Trust.

Remarks:

The Reporting Person is a Director of MPLX GP LLC, the general partner of the Issuer. The Issuer is managed by the directors and executive officers of MPLX GP LLC.