# EDGAR Filing Document

**Accession Number:** 0001552000
**File Stem:** 0001552000-25-000030
**Filing Date:** 2025-8
**Character Count:** 5159
**Document Hash:** 4c2d6ec449c54ab064bb9b222f52c8b0
**Contains OCR:** False
**Source Format:** 

## Filing Content

## Filing Summary
**0001552000-25-000030.hdr.sgml**: 20250825

**ACCESSION NUMBER**: 0001552000-25-000030

**CONFORMED SUBMISSION TYPE**: 8-K

**PUBLIC DOCUMENT COUNT**: 12

**CONFORMED PERIOD OF REPORT**: 20250825

**ITEM INFORMATION**: Departure of Directors or Certain Officers; Election of Directors; Appointment of Certain Officers: Compensatory Arrangements of Certain Officers

**FILED AS OF DATE**: 20250825

**DATE AS OF CHANGE**: 20250825

**FILER**: 

**COMPANY DATA:**
- **COMPANY CONFORMED NAME:** MPLX LP
- **CENTRAL INDEX KEY:** 0001552000
- **STANDARD INDUSTRIAL CLASSIFICATION:** PIPE LINES (NO NATURAL GAS) [4610]
- **ORGANIZATION NAME:** 01 Energy & Transportation
- **EIN:** 270005456
- **FISCAL YEAR END:** 1231

**FILING VALUES:**
- **FORM TYPE:** 8-K
- **SEC ACT:** 1934 Act
- **SEC FILE NUMBER:** 001-35714
- **FILM NUMBER:** 251247862

**BUSINESS ADDRESS:**
- **STREET 1:** 200 E. HARDIN STREET
- **CITY:** FINDLAY
- **STATE:** OH
- **ZIP:** 45840
- **BUSINESS PHONE:** (419) 422-2121

**MAIL ADDRESS:**
- **STREET 1:** 200 E. HARDIN STREET
- **CITY:** FINDLAY
- **STATE:** OH
- **ZIP:** 45840

?xml version='1.0' encoding='ASCII'? mplx-20250825

**UNITED STATES**

**SECURITIES AND EXCHANGE COMMISSION**

**Washington, D.C. 20549**

_____________________________________________

**FORM 8-K** 

_____________________________________________

**CURRENT REPORT**

**Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934**

**Date of Report (Date of earliest event reported) August 25, 2025**

_____________________________________________

**MPLX LP** 

*(Exact name of registrant as specified in its charter)*

_____________________________________________

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| | | |
|:---|:---|:---|
| **Delaware** | **001-35714** | **27-0005456** |
| *(State or other jurisdiction<br>of incorporation)* | *(Commission File Number)* | *(IRS Employer<br>Identification No.)* |

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**200 E. Hardin Street, Findlay, Ohio 45840** 

*(Address of principal executive offices) (Zip code)*

Registrant's telephone number, including area code: **(419) 422-2121** 

_____________________________________________

Check the appropriate box below if the Form 8-K filing is intended to simultaneously satisfy the filing obligation of the registrant under any of the following provisions:

☐ Written communications pursuant to Rule 425 under the Securities Act (17 CFR 230.425)

☐ Soliciting material pursuant to Rule 14a-12 under the Exchange Act (17 CFR 240.14a-12)

☐ Pre-commencement communications pursuant to Rule 14d-2(b) under the Exchange Act (17 CFR 240.14d-2(b))

☐ Pre-commencement communications pursuant to Rule 13e-4(c) under the Exchange Act (17 CFR 240.13e-4(c))

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| | | |
|:---|:---|:---|
| Securities registered pursuant to Section 12(b) of the Act: | Securities registered pursuant to Section 12(b) of the Act: | Securities registered pursuant to Section 12(b) of the Act: |
| Title of each class | Trading<br>symbol(s) | Name of each exchange on which registered |
| Common Units Representing Limited Partnership Interests | MPLX | New York Stock Exchange |

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Indicate by check mark whether the registrant is an emerging growth company as defined in Rule 405 of the Securities Act of 1933 (§230.405 of this chapter) or Rule 12b-2 of the Securities Exchange Act of 1934 (§240.12b-2 of this chapter).

Emerging growth company ☐

If an emerging growth company, indicate by check mark if the registrant has elected not to use the extended transition period for complying with any new or revised financial accounting standards provided pursuant to Section 13(a) of the Exchange Act.

☐

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| | |
|:---|:---|
| **Item 5.02** | **Departure of Directors or Certain Officers; Election of Directors; Appointment of Certain Officers; Compensatory Arrangements of Certain Officers.** |

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| |
|:---|
| On August 25, 2025, the board of managers of MPC Investment LLC, the sole member of MPLX GP LLC, the general partner (the "General Partner"), of MPLX LP (the "Partnership"), increased the size of the board of directors of the General Partner (the "Board") to eleven members and elected Ray N. Walker, Jr. to serve on the Board as a director, effective August 25, 2025. Mr. Walker is expected to serve on the audit committee and conflicts committee of the Board. |
| As a non-management director, Mr. Walker will receive compensation in the same manner as the Board's other non-management directors. The terms of non-management director compensation were disclosed in the Partnership's Annual Report on Form 10-K for the year ended December 31, 2024, filed with the Securities and Exchange Commission on February 27, 2025. |

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**SIGNATURES**

Pursuant to the requirements of the Securities Exchange Act of 1934, the registrant has duly caused this report to be signed on its behalf by the undersigned hereunto duly authorized.

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| | | |
|:---|:---|:---|
| | MPLX LP | |
| | By: | MPLX GP LLC, its General Partner |
| Date: August 25, 2025 | By: | /s/ Molly R. Benson |
|  |  | Name: Molly R. Benson |
|  |  | Title: Chief Legal Officer and Corporate Secretary |

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