Corporate Governance

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Governance Principles

Provided here are the Governance Principles adopted by the MPLX GP LLC board of directors.

Governance Principles (Amended and Restated effective February 26, 2025)

A branded Marathon walkway connecting two buildings

MPLX Leadership

Board of Directors

MPLX benefits from thoughtful oversight in all matters of governance.

Learn About MPLX Directors

Officers

MPLX is guided by a strategic, passionate leadership team devoted to delivering value for all our stakeholders.

Learn About MPLX Officers

Code of Ethics for Senior Financial Officers

Pursuant to Section 406 of the Sarbanes-Oxley Act of 2002 and its associated regulations, the board of directors of the general partner approved and adopted a Code of Ethics for Senior Financial Officers, which is set forth below.

Code of Ethics for Senior Financial Officers

Code of Business Conduct

The Marathon Petroleum Code of Business Conduct lays the foundation for good business decisions. No single document can list and explain every question or business practice. The words found throughout the code include trust, respect, dignity and honesty and provide overall guidance.

Code of Business Conduct

Code of Business Conduct (Español) 

A representation of the MPLX Code of Business Conduct book

Policies and Guidelines

MPLX has adopted the following corporate governance policies, guidelines and procedures.

Whistleblowing as to Accounting Matters

Pre-Approval of Audit, Audit Related, Tax and Permissible Non-Audit Services

Guidelines for Hiring of Employees or Former Employees of Independent Auditor

Related Person Transactions

Conflicts of Interest

Anticorruption

Certificate of Limited Partnership

The Certificate of Limited Partnership of MPLX filed with the secretary of state of the state of Delaware on March 27, 2012, as amended, is set forth below.

Certificate of Limited Partnership

CEO/CFO Certifications

2024 Certifications

CEO/CFO Certifications for 10-Q for Quarter Ending March 31, 2024

CEO/CFO Certifications for 10-Q for Quarter Ending June 30, 2024

CEO/CFO Certifications for 10-Q for Quarter Ending September 30, 2024

CEO/CFO Certifications for 10-Q for Year Ending December 31, 2024

Previous Certifications

2023

CEO/CFO Certifications for 10-Q for Quarter Ending March 31, 2023

CEO/CFO Certifications for 10-Q for Quarter Ending June 30, 2023

CEO/CFO Certifications for 10-Q for Quarter Ending September 30, 2023

CEO/CFO Certifications for 10-K for Year Ending December 31, 2023

2022

CEO/CFO Certifications for 10-Q for Quarter Ending March 31, 2022

CEO/CFO Certifications for 10-Q for Quarter Ending June 30, 2022

CEO/CFO Certifications for 10-Q for Quarter Ending September 30, 2022

CEO/CFO Certifications for 10-K for Year Ending December 31, 2022

2021

CEO/CFO Certifications for 10-Q for Quarter Ending March 31, 2021

CEO/CFO Certifications for 10-Q for Quarter Ending June 30, 2021

CEO/CFO Certifications for 10-Q for Quarter Ending September 30, 2021

CEO/CFO Certifications for 10-K for Year Ending December 31, 2021

2020

CEO/CFO Certifications for 10-Q for Quarter Ending March 31, 2020 

CEO/CFO Certifications for 10-Q for Quarter Ending June 30, 2020 

CEO/CFO Certifications for 10-Q for Quarter Ending September 30, 2020 

CEO/CFO Certifications for 10-K for Year Ending December 31, 2020

 

2019

CEO/CFO Certifications for 10-Q for Quarter Ending March 31, 2019 

CEO/CFO Certifications for 10-Q for Quarter Ending June 30, 2019

CEO/CFO Certifications for 10-Q for Quarter Ending September 30, 2019

CEO/CFO Certifications for 10-K for Year Ending December 31, 2019

 

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Contact Us

Investor Relations

Institutional Investors:
(419) 421-2071
[email protected]

Individual Unitholders:
Unitholder Services

 

MPLX LP
200 East Hardin Street
Findlay, Ohio 45840

(419) 421-2414

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