0001209191-16-140297.txt : 20160906 0001209191-16-140297.hdr.sgml : 20160906 20160906195804 ACCESSION NUMBER: 0001209191-16-140297 CONFORMED SUBMISSION TYPE: 3 PUBLIC DOCUMENT COUNT: 1 CONFORMED PERIOD OF REPORT: 20160901 FILED AS OF DATE: 20160906 DATE AS OF CHANGE: 20160906 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 Holdings Inc. CENTRAL INDEX KEY: 0001683291 STATE OF INCORPORATION: DE FISCAL YEAR END: 1231 FILING VALUES: FORM TYPE: 3 SEC ACT: 1934 Act SEC FILE NUMBER: 001-35714 FILM NUMBER: 161871979 BUSINESS ADDRESS: STREET 1: 539 SOUTH MAIN STREET CITY: FINDLAY STATE: OH ZIP: 45840 BUSINESS PHONE: 419-421-2414 MAIL ADDRESS: STREET 1: 539 SOUTH MAIN STREET CITY: FINDLAY STATE: OH ZIP: 45840 3 1 doc3.xml FORM 3 SUBMISSION X0206 3 2016-09-01 0 0001552000 MPLX LP MPLX 0001683291 MPLX Holdings Inc. 539 S. MAIN ST. FINDLAY OH 45840 1 0 1 0 Class A Units 28554313 I See Footnotes Common Units (Limited Partner Interests) 79466136 I See Footnotes Pursuant to a Master Reorganization Agreement effective September 1, 2016 by and among MPLX Holdings Inc. ("Holdings"), MarkWest Energy Partners, L.P., MWE GP LLC, MPLX LP ("MPLX"), MPLX GP LLC ("the "General Partner"), MPC Investment LLC ("MPC Investment"), MPLX Logistics Holdings LLC ("Logistics Holdings") and MarkWest Hydrocarbon, L.L.C. ("Hydrocarbon"), Holdings became a part of a reporting group which includes Marathon Petroleum Corporation ("MPC"), MPC Investment, the General Partner, Hydrocarbon and Logistics Holdings. MPC Investment, a direct wholly-owned subsidiary of MPC, owns all of the membership interests or stock in the General Partner, Logistics Holdings and Holdings. Holdings owned all of the membership interests in Hydrocarbon as of September 1, 2016. Accordingly, the General Partner, Logistics Holdings, Holdings and Hydrocarbon were all indirect wholly-owned subsidiaries of MPC as of the September 1, 2016. Hydrocarbon, a wholly-owned subsidiary of Holdings, owned all of the Issuer's Class A units as of September 1, 2016. As of September 1, 2016, the General Partner directly owned 7,630,225 general partner units, representing its 2% general partner interest in the Issuer and Logistics Holdings beneficially owned 79,466,136 common units representing limited partnership interests in the Issuer. MPC Investment owns all of the membership interests in Logistics Holdings and the General Partner, and MPC owns all of the membership interest in MPC Investment. Accordingly, MPC, MPC Investment and Holdings may be deemed to have indirectly beneficially owned the securities directly held by the General Partner, Logistics Holdings and Hydrocarbon but disclaim beneficial ownership except to the extent of their respective pecuniary interests therein. /s/ Molly R. Benson, Director and Secretary, MPLX Holdings Inc. 2016-09-06