Maryann T. Mannen - 01 Mar 2026 Form 4 Insider Report for MPLX LP (MPLX)

Signature
/s/ Molly R. Benson, Attorney-in-Fact for Maryann T. Mannen
Issuer symbol
MPLX
Transactions as of
01 Mar 2026
Net transactions value
-$782,888
Form type
4
Filing time
03 Mar 2026, 19:34:47 UTC
Previous filing
03 Mar 2026

Reporting Owners (1)

Name Relationship Address Signature Signature date CIK
Mannen Maryann T. Chairman, President & CEO, Director C/O MPLX LP, 200 E. HARDIN STREET, FINDLAY /s/ Molly R. Benson, Attorney-in-Fact for Maryann T. Mannen 03 Mar 2026 0001408964

Transactions Table

Type Sym Class Transaction Value $ Shares Change % * Price $ Shares After Date Ownership Footnotes
transaction MPLX Common Units (Limited Partner Interests) Award $0 +52,817 +42% $0.000000 178,679 01 Mar 2026 Direct
transaction MPLX Common Units (Limited Partner Interests) Tax liability $201,763 -3,407 -1.9% $59.22 175,272 02 Mar 2026 Direct
transaction MPLX Common Units (Limited Partner Interests) Tax liability $201,585 -3,404 -1.9% $59.22 171,868 02 Mar 2026 Direct
transaction MPLX Common Units (Limited Partner Interests) Tax liability $379,541 -6,409 -3.7% $59.22 165,459 02 Mar 2026 Direct
* An asterisk sign (*) next to the price indicates that the price is likely invalid.

Remarks:

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