In connection with the issuance by MPLX LP (“MPLX”) of 81,352 common units upon the vesting of phantom units under the MPLX 2012 Incentive Compensation Plan and 6,090,623 common units under MPLX’s at-the-market equity offering program during the month of December, on December 30, 2016, MPLX GP LLC purchased 125,959 general partner units for $4,055,467 in cash to maintain its two percent general partner interest in MPLX. The general partner units were issued in reliance on an exemption from registration under Section 4(a)(2) of the Securities Act of 1933, as amended.