0001209191-15-084113.txt : 20151208 0001209191-15-084113.hdr.sgml : 20151208 20151208190322 ACCESSION NUMBER: 0001209191-15-084113 CONFORMED SUBMISSION TYPE: 4 PUBLIC DOCUMENT COUNT: 1 CONFORMED PERIOD OF REPORT: 20151204 FILED AS OF DATE: 20151208 DATE AS OF CHANGE: 20151208 ISSUER: COMPANY DATA: COMPANY CONFORMED NAME: MPLX LP CENTRAL INDEX KEY: 0001552000 STANDARD INDUSTRIAL CLASSIFICATION: PIPE LINES (NO NATURAL GAS) [4610] IRS NUMBER: 270005456 FISCAL YEAR END: 1231 BUSINESS ADDRESS: STREET 1: 200 E. HARDIN STREET CITY: FINDLAY STATE: OH ZIP: 45840 BUSINESS PHONE: (419) 421-2159 MAIL ADDRESS: STREET 1: 200 E. HARDIN STREET CITY: FINDLAY STATE: OH ZIP: 45840 REPORTING-OWNER: OWNER DATA: COMPANY CONFORMED NAME: MPLX Logistics Holdings LLC CENTRAL INDEX KEY: 0001551994 STATE OF INCORPORATION: DE FISCAL YEAR END: 1231 FILING VALUES: FORM TYPE: 4 SEC ACT: 1934 Act SEC FILE NUMBER: 001-35714 FILM NUMBER: 151276736 BUSINESS ADDRESS: STREET 1: 200 E. HARDIN STREET CITY: FINDLAY STATE: OH ZIP: 45840 BUSINESS PHONE: (419) 421-2159 MAIL ADDRESS: STREET 1: 200 E. HARDIN STREET CITY: FINDLAY STATE: OH ZIP: 45840 REPORTING-OWNER: OWNER DATA: COMPANY CONFORMED NAME: MPLX GP LLC CENTRAL INDEX KEY: 0001551999 STATE OF INCORPORATION: DE FISCAL YEAR END: 1231 FILING VALUES: FORM TYPE: 4 SEC ACT: 1934 Act SEC FILE NUMBER: 001-35714 FILM NUMBER: 151276737 BUSINESS ADDRESS: STREET 1: 200 E. HARDIN STREET CITY: FINDLAY STATE: OH ZIP: 45840 BUSINESS PHONE: (419) 421-2159 MAIL ADDRESS: STREET 1: 200 E. HARDIN STREET CITY: FINDLAY STATE: OH ZIP: 45840 REPORTING-OWNER: OWNER DATA: COMPANY CONFORMED NAME: MPC Investment LLC CENTRAL INDEX KEY: 0001560713 STATE OF INCORPORATION: DE FISCAL YEAR END: 1231 FILING VALUES: FORM TYPE: 4 SEC ACT: 1934 Act SEC FILE NUMBER: 001-35714 FILM NUMBER: 151276738 BUSINESS ADDRESS: STREET 1: 539 S. MAIN STREET CITY: FINDLAY STATE: OH ZIP: 45840 BUSINESS PHONE: (419) 421-2159 MAIL ADDRESS: STREET 1: 539 S. MAIN STREET CITY: FINDLAY STATE: OH ZIP: 45840 REPORTING-OWNER: OWNER DATA: COMPANY CONFORMED NAME: Marathon Petroleum Corp CENTRAL INDEX KEY: 0001510295 STANDARD INDUSTRIAL CLASSIFICATION: PETROLEUM REFINING [2911] STATE OF INCORPORATION: DE FISCAL YEAR END: 1231 FILING VALUES: FORM TYPE: 4 SEC ACT: 1934 Act SEC FILE NUMBER: 001-35714 FILM NUMBER: 151276739 BUSINESS ADDRESS: STREET 1: 539 SOUTH MAIN STREET CITY: FINDLAY STATE: OH ZIP: 45840-3229 BUSINESS PHONE: 419-422-2121 MAIL ADDRESS: STREET 1: 539 SOUTH MAIN STREET CITY: FINDLAY STATE: OH ZIP: 45840-3229 4 1 doc4.xml FORM 4 SUBMISSION X0306 4 2015-12-04 0 0001552000 MPLX LP MPLX 0001510295 Marathon Petroleum Corp 539 S. MAIN STREET FINDLAY OH 45840 1 0 1 0 0001560713 MPC Investment LLC 539 S. MAIN STREET FINDLAY OH 45840 1 0 1 0 0001551999 MPLX GP LLC 200 E. HARDIN STREET FINDLAY OH 45840 1 0 0 0 0001551994 MPLX Logistics Holdings LLC 200 E. HARDIN STREET FINDLAY OH 45840 0 0 1 0 Class A Units 2015-12-04 4 A 0 28554313 A 28554313 I See Footnotes This Form 4 is filed jointly by Marathon Petroleum Corporation ("MPC"), MPC Investment LLC ("MPC Investment"), MPLX GP LLC (the "General Partner"), and MPLX Logistics Holdings LLC ("MPLX Logistics Holdings"), with respect to the Issuer's Class A units. MarkWest Hydrocarbon, Inc., an indirect wholly-owned subsidiary of the Issuer, owns all of the Issuer's Class A units. The General Partner directly owns 6,800,475 general partner units, representing its 2% general partner interest in the Issuer and MPLX Logistics Holdings LLC beneficially owns 56,932,134 common units representing limited partnership interests in the Issuer. MPC Investment, a direct wholly-owned subsidiary of MPC, owns all of the membership interests in both the General Partner and MPLX Logistics Holdings. Accordingly, the General Partner and MPLX Logistics Holdings are both indirect wholly-owned subsidiaries of MPC. MPC Investment owns all of the membership interests in both the General Partner and MPLX Logistics Holdings, and MPC owns all of the membership interest in MPC Investment. Accordingly, MPC, MPC Investment, the General Partner and MPLX Logistics Holdings may be deemed to indirectly beneficially own the securities of the Issuer directly held by MarkWest Hydrocarbon, Inc., but disclaim beneficial ownership except to the extent of their respective pecuniary interests therein. Received in exchange for 22,640,000 MarkWest Energy Partners, L.P. ("MarkWest") Class A units in connection with the merger of Sapphire Holdco LLC, a wholly-owned subsidiary of the Issuer, with and into MarkWest on December 4, 2015, with MarkWest as the surviving entity (the "Merger"). The MarkWest Class A units outstanding immediately prior to the effective time of the Merger were converted into the specified number of Issuer Class A units having substantially similar rights and obligations that the MarkWest Class A units had immediately prior to the effective time. /s/ J. Michael Wilder, Vice President, General Counsel and Secretary, Marathon Petroleum Corporation 2015-12-08 /s/ J. Michael Wilder, Vice President, General Counsel and Secretary, MPC Investment LLC 2015-12-08 /s/ Molly R. Benson, Assistant Secretary, MPLX GP LLC 2015-12-08 /s/ Molly R. Benson, Assistant Secretary, MPLX Logistics Holdings LLC 2015-12-08