Carl Kristopher Hagedorn - 01 Mar 2026 Form 4 Insider Report for MPLX LP (MPLX)

Reporting relationship: Exec VP & Chief Fin Ofc, Director
Issuer ticker: MPLX
Reported as of: 01 Mar 2026
Net transaction value: -$118,499
SEC form: 4
Accepted by SEC: 03 Mar 2026, 19:27:27 UTC
Prior SEC filing: 04 Mar 2025
Source filing: View source filing
Reporting owner signature: /s/ Molly R. Benson, Attorney-in-Fact for Carl Kristopher Hagedorn

Key filing fact

Carl Kristopher Hagedorn filed Form 4 for MPLX LP (MPLX) on 03 Mar 2026.

Key facts

This page summarizes Carl Kristopher Hagedorn's Form 4 filing for MPLX LP (MPLX).
4 reported transactions and 0 derivative rows are listed below.
Accepted by SEC: 03 Mar 2026, 19:27.

Change

Previous filing in this sequence was filed on 04 Mar 2025.
Current net transaction value: -$118,499.

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 0001619644 Primary reporting owner

HAGEDORN CARL KRISTOPHER

Relationship: Exec VP & Chief Fin Ofc, Director
Address: C/O MPLX LP, 200 E. HARDIN STREET, FINDLAY
Signature: /s/ Molly R. Benson, Attorney-in-Fact for Carl Kristopher Hagedorn
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: +4,930
Change %: +28%
Price: $0.000000
Shares after: 22,410
Date: 01 Mar 2026
Ownership: Direct

MPLX transaction

Common Units (Limited Partner Interests)

Tax liability

Transaction value: $24,991
Shares: -422
Change %: -1.9%
Price: $59.22
Shares after: 21,988
Date: 02 Mar 2026
Ownership: Direct

MPLX transaction

Common Units (Limited Partner Interests)

Tax liability

Transaction value: $54,246
Shares: -916
Change %: -4.2%
Price: $59.22
Shares after: 21,072
Date: 02 Mar 2026
Ownership: Direct

MPLX transaction

Common Units (Limited Partner Interests)

Tax liability

Transaction value: $39,263
Shares: -663
Change %: -3.1%
Price: $59.22
Shares after: 20,409
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 a Director and Executive Vice President and Chief Financial 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.