MPLX

SEC source: 0001209191-16-146829 · doc4.xml · nonDerivative · entry 1

Bromley C Corwin · CIK 0001304667 · Exec. VP and Gen Counsel

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 133,559

F1 · kind: The sales reported in this Form 4 were effected pursuant to a Rule 10b5-1 trading plan adopted by the Reporting Person on September 13, 2016.

F2 · price: The price reported in Column 4 is a weighted average price. These units were sold in multiple transactions at prices ranging from $32.00 to $32.06, inclusive. The Reporting Person undertakes to provide to MPLX LP, any security holder of MPLX LP, or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of units sold at each separate price within the range set forth in footnote (2) to this Form 4.

SEC source: 0001209191-16-145781 · doc4.xml · nonDerivative · entry 1

Floerke Gregory Scott · CIK 0001313785 · Exec VP and COO

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 83,007

F1 · kind: The sales reported in this Form 4 were effected pursuant to a Rule 10b5-1 trading plan adopted by the Reporting Person on September 8, 2016.

F2 · balance_after: The amount originally reported in this row reflected units issued on December 4, 2015 in the context of the merger of Sapphire Holdco LLC, a wholly owned subsidiary of the Issuer, with and into MarkWest Energy Partners, L.P. on December 4, 2015 and reflected an under-reporting of 22 units. The amount currently reflected in this row corrects such number of units.

SEC source: 0001209191-16-144899 · doc4.xml · nonDerivative · entry 1

Daberko David A. · CIK 0001181653 · Director

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 18,972.82

SEC source: 0001209191-16-144887 · doc4.xml · nonDerivative · entry 1

BEATTY MICHAEL L · CIK 0001265194 · Director

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 29,892.578

SEC source: 0001209191-16-144940 · doc4.xml · nonDerivative · entry 1

SANDMAN DAN D · CIK 0001236159 · Director

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 51,434.268

SEC source: 0001209191-16-144950 · doc4.xml · nonDerivative · entry 1

SURMA JOHN P · CIK 0001229767 · Director

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 16,472.819

SEC source: 0001209191-16-144918 · doc4.xml · nonDerivative · entry 1

HELMS CHRISTOPHER A · CIK 0001186805 · Director

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 18,434.267

SEC source: 0001209191-16-144930 · doc4.xml · nonDerivative · entry 1

Peiffer Garry L. · CIK 0001521094 · Director

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 4,997.377

SEC source: 0001209191-16-144956 · doc4.xml · nonDerivative · entry 1

Wilson C. Richard · CIK 0001559388 · Director

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 17,434.267

SEC source: 0001209191-16-142860 · doc4.xml · nonDerivative · entry 2

Buese Nancy · CIK 0001344601 · Exec VP and CFO

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 182,779

F1 · kind: The sales reported in this Form 4 were effected pursuant to a Rule 10b5-1 trading plan adopted by the Reporting Person on September 8, 2016.

SEC source: 0001209191-16-142860 · doc4.xml · nonDerivative · entry 1

Buese Nancy · CIK 0001344601 · Exec VP and CFO

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 187,779

F1 · kind: The sales reported in this Form 4 were effected pursuant to a Rule 10b5-1 trading plan adopted by the Reporting Person on September 8, 2016.

SEC source: 0001209191-16-140307 · doc4.xml · nonDerivative · entry 1

Marathon Petroleum Corp · CIK 0001510295 · Director · 10% owner

MARKWEST HYDROCARBON L.L.C. · CIK 0001019756 · Director · 10% owner

MPC Investment LLC · CIK 0001560713 · Director · 10% owner

MPLX Holdings Inc. · CIK 0001683291 · Director · 10% owner

MPLX Logistics Holdings LLC · CIK 0001551994 · Director · 10% owner

MPLX GP LLC · CIK 0001551999 · Director · 10% owner

Joint disclosure: these amounts are not allocated separately to each reporting owner.

10b5-1 filing: Not disclosed

Ownership: Indirect · See Footnotes

Disclosed balance after: 0

F1 · kind: 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"), all issued and outstanding Class A Units representing limited partner interests of MPLX were exchanged for newly issued common units representing limited partner interests of MPLX on a one-to-one conversion, eliminating all issued and outstanding Class A Units representing limited partner interests of MPLX.

F1 · shares: 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"), all issued and outstanding Class A Units representing limited partner interests of MPLX were exchanged for newly issued common units representing limited partner interests of MPLX on a one-to-one conversion, eliminating all issued and outstanding Class A Units representing limited partner interests of MPLX.

F2 · shares: This Form 4 is filed jointly by Marathon Petroleum Corporation ("MPC"), MPC Investment, the General Partner, Logistics Holdings, Holdings and Hydrocarbon, with respect to the Issuer's Class A Units.

F3 · shares: The General Partner directly owns 7,193,467 general partner units, representing its 2% general partner interest in the Issuer. MPC Investment owns all of the membership interests or stock in the General Partner, Logistics Holdings and Holdings, and MPC owns all of the membership interests in MPC Investment. Accordingly, MPC, MPC Investment and Holdings may be deemed to have indirectly beneficially owned the securities of the Issuer directly held by the General Partner, Logistics Holdings and Hydrocarbon but disclaim beneficial ownership except to the extent of their respective pecuniary interests therein.

F1 · price: 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"), all issued and outstanding Class A Units representing limited partner interests of MPLX were exchanged for newly issued common units representing limited partner interests of MPLX on a one-to-one conversion, eliminating all issued and outstanding Class A Units representing limited partner interests of MPLX.

F1 · ownership.nature: 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"), all issued and outstanding Class A Units representing limited partner interests of MPLX were exchanged for newly issued common units representing limited partner interests of MPLX on a one-to-one conversion, eliminating all issued and outstanding Class A Units representing limited partner interests of MPLX.

F2 · ownership.nature: This Form 4 is filed jointly by Marathon Petroleum Corporation ("MPC"), MPC Investment, the General Partner, Logistics Holdings, Holdings and Hydrocarbon, with respect to the Issuer's Class A Units.

F3 · ownership.nature: The General Partner directly owns 7,193,467 general partner units, representing its 2% general partner interest in the Issuer. MPC Investment owns all of the membership interests or stock in the General Partner, Logistics Holdings and Holdings, and MPC owns all of the membership interests in MPC Investment. Accordingly, MPC, MPC Investment and Holdings may be deemed to have indirectly beneficially owned the securities of the Issuer directly held by the General Partner, Logistics Holdings and Hydrocarbon but disclaim beneficial ownership except to the extent of their respective pecuniary interests therein.

SEC source: 0001209191-16-140304 · doc4.xml · nonDerivative · entry 2

Marathon Petroleum Corp · CIK 0001510295 · Director · 10% owner

MARKWEST HYDROCARBON L.L.C. · CIK 0001019756 · Director · 10% owner

MPC Investment LLC · CIK 0001560713 · Director · 10% owner

MPLX Holdings Inc. · CIK 0001683291 · Director · 10% owner

MPLX Logistics Holdings LLC · CIK 0001551994 · Director · 10% owner

MPLX GP LLC · CIK 0001551999 · Director · 10% owner

Joint disclosure: these amounts are not allocated separately to each reporting owner.

10b5-1 filing: Not disclosed

Ownership: Indirect · See Footnotes

Disclosed balance after: 86,619,313

F5 · kind: Pursuant to a Master Reorganization Agreement effective September 1, 2016 by and among Holdings, MarkWest, MWE GP, MPLX, the General Partner, MPC Investment, Logistics Holdings and Hydrocarbon, all issued and outstanding Class A Units representing limited partner interests of MPLX were exchanged for newly created and issued common units representing limited partner interests of MPLX on a one-to-one conversion, eliminating all issued and outstanding Class A Units representing limited partner interests of MPLX.

F2 · shares: This Form 4 is filed jointly by Marathon Petroleum Corporation ("MPC"), MPC Investment, the General Partner, Logistics Holdings, Holdings and Hydrocarbon. 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 2, 2016. Accordingly, the General Partner, Logistics Holdings and Holdings are all indirect wholly-owned subsidiaries of MPC, and Hydrocarbon was an indirect wholly-owned subsidiary of MPC as of September 2, 2016.

F3 · shares: The General Partner directly owns 7,193,467 general partner units, representing a 2% general partner interest in the Issuer. MPC Investment owns all of the membership interests or stock in the General Partner, Logistics Holdings and Holdings and MPC owns all of the membership interests in MPC Investment. Holdings owned all of the membership interests in Hydrocarbon as of September 2, 2016. Accordingly, MPC and MPC Investment both may be deemed to have indirectly beneficially owned the securities of the Issuer directly held by the General Partner, Logistics Holdings, Holdings and Hydrocarbon but disclaim beneficial ownership except to the extent of their respective pecuniary interests therein.

F4 · shares: The General Partner directly owns 7,193,467 general partner units, representing its 2% general partner interest in the Issuer.

F5 · shares: Pursuant to a Master Reorganization Agreement effective September 1, 2016 by and among Holdings, MarkWest, MWE GP, MPLX, the General Partner, MPC Investment, Logistics Holdings and Hydrocarbon, all issued and outstanding Class A Units representing limited partner interests of MPLX were exchanged for newly created and issued common units representing limited partner interests of MPLX on a one-to-one conversion, eliminating all issued and outstanding Class A Units representing limited partner interests of MPLX.

F5 · price: Pursuant to a Master Reorganization Agreement effective September 1, 2016 by and among Holdings, MarkWest, MWE GP, MPLX, the General Partner, MPC Investment, Logistics Holdings and Hydrocarbon, all issued and outstanding Class A Units representing limited partner interests of MPLX were exchanged for newly created and issued common units representing limited partner interests of MPLX on a one-to-one conversion, eliminating all issued and outstanding Class A Units representing limited partner interests of MPLX.

F2 · ownership.nature: This Form 4 is filed jointly by Marathon Petroleum Corporation ("MPC"), MPC Investment, the General Partner, Logistics Holdings, Holdings and Hydrocarbon. 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 2, 2016. Accordingly, the General Partner, Logistics Holdings and Holdings are all indirect wholly-owned subsidiaries of MPC, and Hydrocarbon was an indirect wholly-owned subsidiary of MPC as of September 2, 2016.

F3 · ownership.nature: The General Partner directly owns 7,193,467 general partner units, representing a 2% general partner interest in the Issuer. MPC Investment owns all of the membership interests or stock in the General Partner, Logistics Holdings and Holdings and MPC owns all of the membership interests in MPC Investment. Holdings owned all of the membership interests in Hydrocarbon as of September 2, 2016. Accordingly, MPC and MPC Investment both may be deemed to have indirectly beneficially owned the securities of the Issuer directly held by the General Partner, Logistics Holdings, Holdings and Hydrocarbon but disclaim beneficial ownership except to the extent of their respective pecuniary interests therein.

F4 · ownership.nature: The General Partner directly owns 7,193,467 general partner units, representing its 2% general partner interest in the Issuer.

F5 · ownership.nature: Pursuant to a Master Reorganization Agreement effective September 1, 2016 by and among Holdings, MarkWest, MWE GP, MPLX, the General Partner, MPC Investment, Logistics Holdings and Hydrocarbon, all issued and outstanding Class A Units representing limited partner interests of MPLX were exchanged for newly created and issued common units representing limited partner interests of MPLX on a one-to-one conversion, eliminating all issued and outstanding Class A Units representing limited partner interests of MPLX.

SEC source: 0001209191-16-140304 · doc4.xml · nonDerivative · entry 1

Marathon Petroleum Corp · CIK 0001510295 · Director · 10% owner

MARKWEST HYDROCARBON L.L.C. · CIK 0001019756 · Director · 10% owner

MPC Investment LLC · CIK 0001560713 · Director · 10% owner

MPLX Holdings Inc. · CIK 0001683291 · Director · 10% owner

MPLX Logistics Holdings LLC · CIK 0001551994 · Director · 10% owner

MPLX GP LLC · CIK 0001551999 · Director · 10% owner

Joint disclosure: these amounts are not allocated separately to each reporting owner.

10b5-1 filing: Not disclosed

Ownership: Indirect · See Footnotes

Disclosed balance after: 58,064,999

F1 · kind: Pursuant to a Master Reorganization Agreement effective September 1, 2016 by and among MPLX Holdings Inc. ("Holdings"), MarkWest Energy Partners, L.P. ("MarkWest"), MWE GP LLC ("MWE GP"), 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"), MPLX transferred 980 shares of Holdings common stock to Logistics Holdings in exchange for 21,401,137 common units held by Logistics Holdings.

F1 · shares: Pursuant to a Master Reorganization Agreement effective September 1, 2016 by and among MPLX Holdings Inc. ("Holdings"), MarkWest Energy Partners, L.P. ("MarkWest"), MWE GP LLC ("MWE GP"), 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"), MPLX transferred 980 shares of Holdings common stock to Logistics Holdings in exchange for 21,401,137 common units held by Logistics Holdings.

F2 · shares: This Form 4 is filed jointly by Marathon Petroleum Corporation ("MPC"), MPC Investment, the General Partner, Logistics Holdings, Holdings and Hydrocarbon. 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 2, 2016. Accordingly, the General Partner, Logistics Holdings and Holdings are all indirect wholly-owned subsidiaries of MPC, and Hydrocarbon was an indirect wholly-owned subsidiary of MPC as of September 2, 2016.

F3 · shares: The General Partner directly owns 7,193,467 general partner units, representing a 2% general partner interest in the Issuer. MPC Investment owns all of the membership interests or stock in the General Partner, Logistics Holdings and Holdings and MPC owns all of the membership interests in MPC Investment. Holdings owned all of the membership interests in Hydrocarbon as of September 2, 2016. Accordingly, MPC and MPC Investment both may be deemed to have indirectly beneficially owned the securities of the Issuer directly held by the General Partner, Logistics Holdings, Holdings and Hydrocarbon but disclaim beneficial ownership except to the extent of their respective pecuniary interests therein.

F4 · shares: The General Partner directly owns 7,193,467 general partner units, representing its 2% general partner interest in the Issuer.

F1 · price: Pursuant to a Master Reorganization Agreement effective September 1, 2016 by and among MPLX Holdings Inc. ("Holdings"), MarkWest Energy Partners, L.P. ("MarkWest"), MWE GP LLC ("MWE GP"), 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"), MPLX transferred 980 shares of Holdings common stock to Logistics Holdings in exchange for 21,401,137 common units held by Logistics Holdings.

F1 · ownership.nature: Pursuant to a Master Reorganization Agreement effective September 1, 2016 by and among MPLX Holdings Inc. ("Holdings"), MarkWest Energy Partners, L.P. ("MarkWest"), MWE GP LLC ("MWE GP"), 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"), MPLX transferred 980 shares of Holdings common stock to Logistics Holdings in exchange for 21,401,137 common units held by Logistics Holdings.

F2 · ownership.nature: This Form 4 is filed jointly by Marathon Petroleum Corporation ("MPC"), MPC Investment, the General Partner, Logistics Holdings, Holdings and Hydrocarbon. 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 2, 2016. Accordingly, the General Partner, Logistics Holdings and Holdings are all indirect wholly-owned subsidiaries of MPC, and Hydrocarbon was an indirect wholly-owned subsidiary of MPC as of September 2, 2016.

F3 · ownership.nature: The General Partner directly owns 7,193,467 general partner units, representing a 2% general partner interest in the Issuer. MPC Investment owns all of the membership interests or stock in the General Partner, Logistics Holdings and Holdings and MPC owns all of the membership interests in MPC Investment. Holdings owned all of the membership interests in Hydrocarbon as of September 2, 2016. Accordingly, MPC and MPC Investment both may be deemed to have indirectly beneficially owned the securities of the Issuer directly held by the General Partner, Logistics Holdings, Holdings and Hydrocarbon but disclaim beneficial ownership except to the extent of their respective pecuniary interests therein.

F4 · ownership.nature: The General Partner directly owns 7,193,467 general partner units, representing its 2% general partner interest in the Issuer.