Audit Committee

All the members of the MPLX Audit Committee are independent (as independence is defined in Exchange Act Rule 10A-3, as well as the general independence requirements of NYSE Rule 303A.02). The Audit Committee Charter, as revised effective January 25, 2018, is set forth below.

Audit Committee Charter

Audit Committee Charter

Audit Committee Financial Expert

Pursuant to Section 407 of the Sarbanes-Oxley Act of 2002 and associated regulations, the MPLX GP LLC board of directors has determined that Garry L. Peiffer and Christopher A. Helms each qualify as an "Audit Committee Financial Expert."