MPLX

SEC source: 0001209191-19-056850 · doc4.xml · nonDerivative · entry 1

SANDMAN DAN D · CIK 0001236159 · Director

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 99,821.535

SEC source: 0001209191-19-056854 · doc4.xml · nonDerivative · entry 1

SURMA JOHN P · CIK 0001229767 · Director

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 30,270.974

SEC source: 0001209191-19-056846 · doc4.xml · nonDerivative · entry 1

HELMS CHRISTOPHER A · CIK 0001186805 · Director

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 30,191.536

SEC source: 0001209191-19-056848 · doc4.xml · nonDerivative · entry 1

Peiffer Garry L. · CIK 0001521094 · Director

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 16,090.755

SEC source: 0001209191-19-052188 · doc4.xml · nonDerivative · entry 1

BEATTY MICHAEL L · CIK 0001265194 · Director

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 39,947.884

SEC source: 0001209191-19-052329 · doc4.xml · nonDerivative · entry 1

STICE J MICHAEL · CIK 0001497306 · Director

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 7,062.046

SEC source: 0001209191-19-052323 · doc4.xml · nonDerivative · entry 1

SEMPLE FRANK M · CIK 0001270065 · Director

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 10,869.733

SEC source: 0001209191-19-052301 · doc4.xml · nonDerivative · entry 1

SANDMAN DAN D · CIK 0001236159 · Director

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 99,281.966

SEC source: 0001209191-19-052333 · doc4.xml · nonDerivative · entry 1

SURMA JOHN P · CIK 0001229767 · Director

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 29,630.769

SEC source: 0001209191-19-052201 · doc4.xml · nonDerivative · entry 1

HELMS CHRISTOPHER A · CIK 0001186805 · Director

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 29,651.967

SEC source: 0001209191-19-052292 · doc4.xml · nonDerivative · entry 1

Peiffer Garry L. · CIK 0001521094 · Director

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 15,638.365

SEC source: 0001209191-19-046105 · doc4.xml · nonDerivative · entry 1

STICE J MICHAEL · CIK 0001497306 · Director

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 5,931.326

SEC source: 0001209191-19-046103 · doc4.xml · nonDerivative · entry 1

SEMPLE FRANK M · CIK 0001270065 · Director

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 9,894.21

SEC source: 0001209191-19-046087 · doc4.xml · nonDerivative · entry 1

BEATTY MICHAEL L · CIK 0001265194 · Director

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 38,972.361

SEC source: 0001209191-19-046135 · doc4.xml · nonDerivative · entry 1

SURMA JOHN P · CIK 0001229767 · Director

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 28,500.049

SEC source: 0001209191-19-046096 · doc4.xml · nonDerivative · entry 1

SANDMAN DAN D · CIK 0001236159 · Director

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 98,306.443

SEC source: 0001209191-19-046089 · doc4.xml · nonDerivative · entry 1

HELMS CHRISTOPHER A · CIK 0001186805 · Director

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 28,676.444

SEC source: 0001209191-19-046092 · doc4.xml · nonDerivative · entry 1

Peiffer Garry L. · CIK 0001521094 · Director

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 14,662.842

SEC source: 0001209191-19-045682 · doc4.xml · nonDerivative · entry 1

Peiffer Garry L. · CIK 0001521094 · Director

10b5-1 filing: Not disclosed

Ownership: Indirect · By Revocable Trust

Disclosed balance after: 68,497

F1 · price: The price reported in Column 4 is a weighted average price. These units were purchased in multiple transactions at prices ranging from $27.265 to $27.31, 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 purchased at each separate price within the range set forth in footnote (1) to this Form 4.

F2 · ownership.nature: By Garry L. Peiffer Revocable Trust.

SEC source: 0001209191-19-045316 · doc4.xml · nonDerivative · entry 6

Heminger Gary R. · CIK 0001331928 · Director · Chairman, CEO

10b5-1 filing: Not disclosed

Ownership: Indirect · As UTMA custodian for minor grandchild 6

Disclosed balance after: 3,600

F1 · balance_after: The reporting person disclaims beneficial ownership of these units, and this report shall not be deemed an admission that the reporting person is the beneficial owner of such securities for purposes of Section 16 or for any other purpose.

F2 · balance_after: The units are held in UTMA accounts for the benefit of Mr. Heminger's minor grandchildren. Mr. Heminger is the custodian and maintains investment control over the accounts.

SEC source: 0001209191-19-045316 · doc4.xml · nonDerivative · entry 5

Heminger Gary R. · CIK 0001331928 · Director · Chairman, CEO

10b5-1 filing: Not disclosed

Ownership: Indirect · As UTMA custodian for minor grandchild 5

Disclosed balance after: 3,676.612

F5 · price: The price reported in Column 4 is a weighted average price. These units were purchased in multiple transactions at prices ranging from $27.435 to $27.4455, 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 purchased at each separate price within the range set forth in footnotes (3), (4), (5) and (6) to this Form 4.

F1 · balance_after: The reporting person disclaims beneficial ownership of these units, and this report shall not be deemed an admission that the reporting person is the beneficial owner of such securities for purposes of Section 16 or for any other purpose.

F2 · balance_after: The units are held in UTMA accounts for the benefit of Mr. Heminger's minor grandchildren. Mr. Heminger is the custodian and maintains investment control over the accounts.

SEC source: 0001209191-19-045316 · doc4.xml · nonDerivative · entry 4

Heminger Gary R. · CIK 0001331928 · Director · Chairman, CEO

10b5-1 filing: Not disclosed

Ownership: Indirect · As UTMA custodian for minor grandchild 4

Disclosed balance after: 3,676.612

F1 · balance_after: The reporting person disclaims beneficial ownership of these units, and this report shall not be deemed an admission that the reporting person is the beneficial owner of such securities for purposes of Section 16 or for any other purpose.

F2 · balance_after: The units are held in UTMA accounts for the benefit of Mr. Heminger's minor grandchildren. Mr. Heminger is the custodian and maintains investment control over the accounts.

SEC source: 0001209191-19-045316 · doc4.xml · nonDerivative · entry 3

Heminger Gary R. · CIK 0001331928 · Director · Chairman, CEO

10b5-1 filing: Not disclosed

Ownership: Indirect · As UTMA custodian for minor grandchild 3

Disclosed balance after: 3,676.612

F4 · price: The price reported in Column 4 is a weighted average price. These units were purchased in multiple transactions at prices ranging from $27.415 to $27.4357, 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 purchased at each separate price within the range set forth in footnotes (3), (4), (5) and (6) to this Form 4.

F1 · balance_after: The reporting person disclaims beneficial ownership of these units, and this report shall not be deemed an admission that the reporting person is the beneficial owner of such securities for purposes of Section 16 or for any other purpose.

F2 · balance_after: The units are held in UTMA accounts for the benefit of Mr. Heminger's minor grandchildren. Mr. Heminger is the custodian and maintains investment control over the accounts.

SEC source: 0001209191-19-045316 · doc4.xml · nonDerivative · entry 2

Heminger Gary R. · CIK 0001331928 · Director · Chairman, CEO

10b5-1 filing: Not disclosed

Ownership: Indirect · As UTMA custodian for minor grandchild 2

Disclosed balance after: 3,676.612

F3 · price: The price reported in Column 4 is a weighted average price. These units were purchased in multiple transactions at prices ranging from $27.41 to $27.42, 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 purchased at each separate price within the range set forth in footnotes (3), (4), (5) and (6) to this Form 4.

F1 · balance_after: The reporting person disclaims beneficial ownership of these units, and this report shall not be deemed an admission that the reporting person is the beneficial owner of such securities for purposes of Section 16 or for any other purpose.

F2 · balance_after: The units are held in UTMA accounts for the benefit of Mr. Heminger's minor grandchildren. Mr. Heminger is the custodian and maintains investment control over the accounts.

SEC source: 0001209191-19-045316 · doc4.xml · nonDerivative · entry 1

Heminger Gary R. · CIK 0001331928 · Director · Chairman, CEO

10b5-1 filing: Not disclosed

Ownership: Indirect · As UTMA custodian for minor grandchild 1

Disclosed balance after: 3,676.612

F1 · balance_after: The reporting person disclaims beneficial ownership of these units, and this report shall not be deemed an admission that the reporting person is the beneficial owner of such securities for purposes of Section 16 or for any other purpose.

F2 · balance_after: The units are held in UTMA accounts for the benefit of Mr. Heminger's minor grandchildren. Mr. Heminger is the custodian and maintains investment control over the accounts.

SEC source: 0001209191-19-045314 · doc4.xml · nonDerivative · entry 1

SANDMAN DAN D · CIK 0001236159 · Director

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 97,871.816

SEC source: 0001209191-19-045316 · doc4.xml · nonDerivative · entry 7

Heminger Gary R. · CIK 0001331928 · Director · Chairman, CEO

10b5-1 filing: Not disclosed

Ownership: Indirect · By GRAT

Disclosed balance after: 125,780

F6 · price: The price reported in Column 4 is a weighted average price. These units were purchased in multiple transactions at prices ranging from $27.00 to $27.10, 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 purchased at each separate price within the range set forth in footnotes (3), (4), (5) and (6) to this Form 4.

F7 · ownership.nature: By Gary R. Heminger Irrevocable GRAT dated December 18, 2018.

SEC source: 0001209191-19-045284 · doc4.xml · nonDerivative · entry 1

Peiffer Garry L. · CIK 0001521094 · Director

10b5-1 filing: Not disclosed

Ownership: Indirect · By Revocable Trust

Disclosed balance after: 49,697

F1 · price: The price reported in Column 4 is a weighted average price. These units were purchased in multiple transactions at prices ranging from $27.125 to $27.16, 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 purchased at each separate price within the range set forth in footnote (1) to this Form 4.

F2 · ownership.nature: By Garry L. Peiffer Revocable Trust.

SEC source: 0001209191-19-044125 · doc4.xml · nonDerivative · entry 3

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

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

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

MPLX Logistics Holdings LLC · CIK 0001551994 · Less than 10% owner

Western Refining Southwest, Inc. · CIK 0000912517 · 10% owner

Tesoro Logistics GP, LLC · CIK 0001517724 · Less than 10% owner

ANDEAVOR LLC · CIK 0000050104 · 10% owner

Western Refining, Inc. · CIK 0001339048 · 10% owner

Giant Industries, Inc. · CIK 0000856465 · 10% owner

TESORO REFINING & MARKETING Co LLC · CIK 0001144853 · Less than 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: 1

F1 · price: This Form 4 is submitted jointly by Marathon Petroleum Corporation ("MPC"), MPC Investment LLC ("MPC Investment"), MPLX GP LLC (the "General Partner"), MPLX Logistics Holdings LLC ("Logistics Holdings"), Andeavor LLC, Western Refining, Inc. ("WRI"), Giant Industries, Inc. ("GII"), Western Refining Southwest, Inc. ("WRSI"), Tesoro Refining & Marketing Company LLC ("TRMC"), and Tesoro Logistics GP, LLC ("TLGP"). Tesoro Alaska Company LLC ("TAC") is also a member of the Reporting Group but, as described below, is filing a separate Form 4 related to the same events as this Form 4. MPC Investment, a direct wholly owned subsidiary of MPC, owns all of the membership interests in the General Partner and Logistics Holdings. Andeavor LLC is a wholly owned subsidiary of MPC. WRI is a wholly owned subsidiary of Andeavor LLC. GII is a wholly owned subsidiary of WRI. WRSI is a wholly owned subsidiary of GII. TRMC and TAC are wholly owned subsidiaries of WRSI.

F2 · price: On July 30, 2019 (the "Effective Time"), pursuant to the Agreement and Plan of Merger, dated as of May 7, 2019, by and among the Issuer, Andeavor Logistics LP ("ANDX"), TLGP, the General Partner and MPLX MAX LLC ("Merger Sub"), Merger Sub merged with and into ANDX (the "Merger"), with ANDX surviving the Merger as a wholly owned subsidiary of the Issuer.

F7 · price: At the Effective Time, the Special Limited Partnership Interest of ANDX held by WRSI prior to the Effective Time was converted into the right to receive a Special Limited Partner Interest of the Issuer, a new class of special limited partner interest in the Issuer with substantially the same rights, powers, duties and obligations as the Special Limited Partner Interest of ANDX. MPC and certain of the other Reporting Persons may be deemed to beneficially own the Special Limited Partner Interest of the Issuer owned by WRSI, but each disclaims beneficial ownership of such security except to the extent of each Reporting Person's pecuniary interest therein.

F1 · ownership.nature: This Form 4 is submitted jointly by Marathon Petroleum Corporation ("MPC"), MPC Investment LLC ("MPC Investment"), MPLX GP LLC (the "General Partner"), MPLX Logistics Holdings LLC ("Logistics Holdings"), Andeavor LLC, Western Refining, Inc. ("WRI"), Giant Industries, Inc. ("GII"), Western Refining Southwest, Inc. ("WRSI"), Tesoro Refining & Marketing Company LLC ("TRMC"), and Tesoro Logistics GP, LLC ("TLGP"). Tesoro Alaska Company LLC ("TAC") is also a member of the Reporting Group but, as described below, is filing a separate Form 4 related to the same events as this Form 4. MPC Investment, a direct wholly owned subsidiary of MPC, owns all of the membership interests in the General Partner and Logistics Holdings. Andeavor LLC is a wholly owned subsidiary of MPC. WRI is a wholly owned subsidiary of Andeavor LLC. GII is a wholly owned subsidiary of WRI. WRSI is a wholly owned subsidiary of GII. TRMC and TAC are wholly owned subsidiaries of WRSI.

F4 · ownership.nature: All of the membership interests in TLGP are held by TRMC, TAC and WRSI. Accordingly, MPC Investment, the General Partner, Logistics Holdings, Andeavor LLC, WRI, GII, WRSI, TRMC, TAC and TLGP are all direct or indirect wholly owned subsidiaries of MPC.

F7 · ownership.nature: At the Effective Time, the Special Limited Partnership Interest of ANDX held by WRSI prior to the Effective Time was converted into the right to receive a Special Limited Partner Interest of the Issuer, a new class of special limited partner interest in the Issuer with substantially the same rights, powers, duties and obligations as the Special Limited Partner Interest of ANDX. MPC and certain of the other Reporting Persons may be deemed to beneficially own the Special Limited Partner Interest of the Issuer owned by WRSI, but each disclaims beneficial ownership of such security except to the extent of each Reporting Person's pecuniary interest therein.

SEC source: 0001209191-19-044125 · doc4.xml · nonDerivative · entry 2

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

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

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

MPLX Logistics Holdings LLC · CIK 0001551994 · Less than 10% owner

Western Refining Southwest, Inc. · CIK 0000912517 · 10% owner

Tesoro Logistics GP, LLC · CIK 0001517724 · Less than 10% owner

ANDEAVOR LLC · CIK 0000050104 · 10% owner

Western Refining, Inc. · CIK 0001339048 · 10% owner

Giant Industries, Inc. · CIK 0000856465 · 10% owner

TESORO REFINING & MARKETING Co LLC · CIK 0001144853 · Less than 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: 80,000

F1 · price: This Form 4 is submitted jointly by Marathon Petroleum Corporation ("MPC"), MPC Investment LLC ("MPC Investment"), MPLX GP LLC (the "General Partner"), MPLX Logistics Holdings LLC ("Logistics Holdings"), Andeavor LLC, Western Refining, Inc. ("WRI"), Giant Industries, Inc. ("GII"), Western Refining Southwest, Inc. ("WRSI"), Tesoro Refining & Marketing Company LLC ("TRMC"), and Tesoro Logistics GP, LLC ("TLGP"). Tesoro Alaska Company LLC ("TAC") is also a member of the Reporting Group but, as described below, is filing a separate Form 4 related to the same events as this Form 4. MPC Investment, a direct wholly owned subsidiary of MPC, owns all of the membership interests in the General Partner and Logistics Holdings. Andeavor LLC is a wholly owned subsidiary of MPC. WRI is a wholly owned subsidiary of Andeavor LLC. GII is a wholly owned subsidiary of WRI. WRSI is a wholly owned subsidiary of GII. TRMC and TAC are wholly owned subsidiaries of WRSI.

F2 · price: On July 30, 2019 (the "Effective Time"), pursuant to the Agreement and Plan of Merger, dated as of May 7, 2019, by and among the Issuer, Andeavor Logistics LP ("ANDX"), TLGP, the General Partner and MPLX MAX LLC ("Merger Sub"), Merger Sub merged with and into ANDX (the "Merger"), with ANDX surviving the Merger as a wholly owned subsidiary of the Issuer.

F6 · price: At the Effective Time, each TexNew Mex Unit of ANDX held by WRSI prior to the Effective Time was converted into the right to receive a TexNew Mex Unit of the Issuer, a new class of limited partner units in the Issuer with substantially the same rights, powers, duties and obligations as the TexNew Mex Units of ANDX. MPC and certain of the other Reporting Persons may be deemed to beneficially own all of the TexNew Mex Units of MPLX owned by WRSI, but each disclaims beneficial ownership of such securities except to the extent of each Reporting Person's pecuniary interest therein.

F1 · ownership.nature: This Form 4 is submitted jointly by Marathon Petroleum Corporation ("MPC"), MPC Investment LLC ("MPC Investment"), MPLX GP LLC (the "General Partner"), MPLX Logistics Holdings LLC ("Logistics Holdings"), Andeavor LLC, Western Refining, Inc. ("WRI"), Giant Industries, Inc. ("GII"), Western Refining Southwest, Inc. ("WRSI"), Tesoro Refining & Marketing Company LLC ("TRMC"), and Tesoro Logistics GP, LLC ("TLGP"). Tesoro Alaska Company LLC ("TAC") is also a member of the Reporting Group but, as described below, is filing a separate Form 4 related to the same events as this Form 4. MPC Investment, a direct wholly owned subsidiary of MPC, owns all of the membership interests in the General Partner and Logistics Holdings. Andeavor LLC is a wholly owned subsidiary of MPC. WRI is a wholly owned subsidiary of Andeavor LLC. GII is a wholly owned subsidiary of WRI. WRSI is a wholly owned subsidiary of GII. TRMC and TAC are wholly owned subsidiaries of WRSI.

F4 · ownership.nature: All of the membership interests in TLGP are held by TRMC, TAC and WRSI. Accordingly, MPC Investment, the General Partner, Logistics Holdings, Andeavor LLC, WRI, GII, WRSI, TRMC, TAC and TLGP are all direct or indirect wholly owned subsidiaries of MPC.

F6 · ownership.nature: At the Effective Time, each TexNew Mex Unit of ANDX held by WRSI prior to the Effective Time was converted into the right to receive a TexNew Mex Unit of the Issuer, a new class of limited partner units in the Issuer with substantially the same rights, powers, duties and obligations as the TexNew Mex Units of ANDX. MPC and certain of the other Reporting Persons may be deemed to beneficially own all of the TexNew Mex Units of MPLX owned by WRSI, but each disclaims beneficial ownership of such securities except to the extent of each Reporting Person's pecuniary interest therein.

SEC source: 0001209191-19-044125 · doc4.xml · nonDerivative · entry 1

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

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

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

MPLX Logistics Holdings LLC · CIK 0001551994 · Less than 10% owner

Western Refining Southwest, Inc. · CIK 0000912517 · 10% owner

Tesoro Logistics GP, LLC · CIK 0001517724 · Less than 10% owner

ANDEAVOR LLC · CIK 0000050104 · 10% owner

Western Refining, Inc. · CIK 0001339048 · 10% owner

Giant Industries, Inc. · CIK 0000856465 · 10% owner

TESORO REFINING & MARKETING Co LLC · CIK 0001144853 · Less than 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: 665,997,540

F1 · price: This Form 4 is submitted jointly by Marathon Petroleum Corporation ("MPC"), MPC Investment LLC ("MPC Investment"), MPLX GP LLC (the "General Partner"), MPLX Logistics Holdings LLC ("Logistics Holdings"), Andeavor LLC, Western Refining, Inc. ("WRI"), Giant Industries, Inc. ("GII"), Western Refining Southwest, Inc. ("WRSI"), Tesoro Refining & Marketing Company LLC ("TRMC"), and Tesoro Logistics GP, LLC ("TLGP"). Tesoro Alaska Company LLC ("TAC") is also a member of the Reporting Group but, as described below, is filing a separate Form 4 related to the same events as this Form 4. MPC Investment, a direct wholly owned subsidiary of MPC, owns all of the membership interests in the General Partner and Logistics Holdings. Andeavor LLC is a wholly owned subsidiary of MPC. WRI is a wholly owned subsidiary of Andeavor LLC. GII is a wholly owned subsidiary of WRI. WRSI is a wholly owned subsidiary of GII. TRMC and TAC are wholly owned subsidiaries of WRSI.

F2 · price: On July 30, 2019 (the "Effective Time"), pursuant to the Agreement and Plan of Merger, dated as of May 7, 2019, by and among the Issuer, Andeavor Logistics LP ("ANDX"), TLGP, the General Partner and MPLX MAX LLC ("Merger Sub"), Merger Sub merged with and into ANDX (the "Merger"), with ANDX surviving the Merger as a wholly owned subsidiary of the Issuer.

F3 · price: At the Effective Time, each common unit representing limited partner interests in ANDX held by each of WRSI and TLGP was converted into the right to receive 1.0328 common units representing limited partner interests in the Issuer (such conversion, the "Common Unit Conversion"). As a result of the Common Unit Conversion, WRSI received 69,763,859 common units representing limited partner interests in the Issuer and TLGP received 91,531,747 common units representing limited partner interests in the Issuer.

F4 · price: All of the membership interests in TLGP are held by TRMC, TAC and WRSI. Accordingly, MPC Investment, the General Partner, Logistics Holdings, Andeavor LLC, WRI, GII, WRSI, TRMC, TAC and TLGP are all direct or indirect wholly owned subsidiaries of MPC.

F5 · price: The closing price of common units representing limited partner interests in the Issuer on July 29, 2019, which was the last complete trading day prior to Effective Time, was $28.51 as reported on the New York Stock Exchange. MPC and certain of the other Reporting Persons may be deemed to beneficially own all of the common units representing limited partner interests in the Issuer owned by each of WRSI and TLGP, but each disclaims beneficial ownership of such securities except to the extent of each Reporting Person's pecuniary interest therein.

F1 · ownership.nature: This Form 4 is submitted jointly by Marathon Petroleum Corporation ("MPC"), MPC Investment LLC ("MPC Investment"), MPLX GP LLC (the "General Partner"), MPLX Logistics Holdings LLC ("Logistics Holdings"), Andeavor LLC, Western Refining, Inc. ("WRI"), Giant Industries, Inc. ("GII"), Western Refining Southwest, Inc. ("WRSI"), Tesoro Refining & Marketing Company LLC ("TRMC"), and Tesoro Logistics GP, LLC ("TLGP"). Tesoro Alaska Company LLC ("TAC") is also a member of the Reporting Group but, as described below, is filing a separate Form 4 related to the same events as this Form 4. MPC Investment, a direct wholly owned subsidiary of MPC, owns all of the membership interests in the General Partner and Logistics Holdings. Andeavor LLC is a wholly owned subsidiary of MPC. WRI is a wholly owned subsidiary of Andeavor LLC. GII is a wholly owned subsidiary of WRI. WRSI is a wholly owned subsidiary of GII. TRMC and TAC are wholly owned subsidiaries of WRSI.

F3 · ownership.nature: At the Effective Time, each common unit representing limited partner interests in ANDX held by each of WRSI and TLGP was converted into the right to receive 1.0328 common units representing limited partner interests in the Issuer (such conversion, the "Common Unit Conversion"). As a result of the Common Unit Conversion, WRSI received 69,763,859 common units representing limited partner interests in the Issuer and TLGP received 91,531,747 common units representing limited partner interests in the Issuer.

F4 · ownership.nature: All of the membership interests in TLGP are held by TRMC, TAC and WRSI. Accordingly, MPC Investment, the General Partner, Logistics Holdings, Andeavor LLC, WRI, GII, WRSI, TRMC, TAC and TLGP are all direct or indirect wholly owned subsidiaries of MPC.

SEC source: 0001209191-19-044127 · doc4.xml · nonDerivative · entry 3

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

Tesoro Alaska Co LLC · CIK 0000911614 · Less than 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: 1

F1 · price: This Form 4 is submitted by Tesoro Alaska Company LLC ("TAC") with respect to certain transactions involving the securities of the Issuer by a Reporting Group consisting of Marathon Petroleum Corporation ("MPC"), MPC Investment LLC ("MPC Investment"), MPLX GP LLC (the "General Partner"), MPLX Logistics Holdings LLC ("Logistics Holdings"), Andeavor LLC, Western Refining, Inc. ("WRI"), Giant Industries, Inc. ("GII"), Western Refining Southwest, Inc. ("WRSI"), Tesoro Refining & Marketing Company LLC ("TRMC"), and Tesoro Logistics GP, LLC ("TLGP"). TAC is also a member of the Reporting Group and, as described below, is filing this separate Form 4 related to the same events.

F2 · price: On July 30, 2019 (the "Effective Time"), pursuant to the Agreement and Plan of Merger, dated as of May 7, 2019, by and among the Issuer, Andeavor Logistics LP ("ANDX"), TLGP, the General Partner and MPLX MAX LLC ("Merger Sub"), Merger Sub merged with and into ANDX (the "Merger"), with ANDX surviving the Merger as a wholly owned subsidiary of the Issuer.

F8 · price: At the Effective Time, the Special Limited Partnership Interest of ANDX held by WRSI prior to the Effective Time was converted into the right to receive a Special Limited Partner Interest of the Issuer, a new class of special limited partner interest in the Issuer with substantially the same rights, powers, duties and obligations as the Special Limited Partner Interest of ANDX. MPC and certain of the other Reporting Persons may be deemed to beneficially own the Special Limited Partner Interest of the Issuer owned by WRSI, but each disclaims beneficial ownership of such security except to the extent of each Reporting Person's pecuniary interest therein.

F1 · ownership.nature: This Form 4 is submitted by Tesoro Alaska Company LLC ("TAC") with respect to certain transactions involving the securities of the Issuer by a Reporting Group consisting of Marathon Petroleum Corporation ("MPC"), MPC Investment LLC ("MPC Investment"), MPLX GP LLC (the "General Partner"), MPLX Logistics Holdings LLC ("Logistics Holdings"), Andeavor LLC, Western Refining, Inc. ("WRI"), Giant Industries, Inc. ("GII"), Western Refining Southwest, Inc. ("WRSI"), Tesoro Refining & Marketing Company LLC ("TRMC"), and Tesoro Logistics GP, LLC ("TLGP"). TAC is also a member of the Reporting Group and, as described below, is filing this separate Form 4 related to the same events.

F6 · ownership.nature: MPC Investment, a direct wholly owned subsidiary of MPC, owns all of the membership interests in the General Partner and Logistics Holdings. Andeavor LLC is a wholly owned subsidiary of MPC. WRI is a wholly owned subsidiary of Andeavor LLC. GII is a wholly owned subsidiary of WRI. WRSI is a wholly owned subsidiary of GII. TRMC and TAC are wholly owned subsidiaries of WRSI.

F8 · ownership.nature: At the Effective Time, the Special Limited Partnership Interest of ANDX held by WRSI prior to the Effective Time was converted into the right to receive a Special Limited Partner Interest of the Issuer, a new class of special limited partner interest in the Issuer with substantially the same rights, powers, duties and obligations as the Special Limited Partner Interest of ANDX. MPC and certain of the other Reporting Persons may be deemed to beneficially own the Special Limited Partner Interest of the Issuer owned by WRSI, but each disclaims beneficial ownership of such security except to the extent of each Reporting Person's pecuniary interest therein.

SEC source: 0001209191-19-044127 · doc4.xml · nonDerivative · entry 2

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

Tesoro Alaska Co LLC · CIK 0000911614 · Less than 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: 80,000

F1 · price: This Form 4 is submitted by Tesoro Alaska Company LLC ("TAC") with respect to certain transactions involving the securities of the Issuer by a Reporting Group consisting of Marathon Petroleum Corporation ("MPC"), MPC Investment LLC ("MPC Investment"), MPLX GP LLC (the "General Partner"), MPLX Logistics Holdings LLC ("Logistics Holdings"), Andeavor LLC, Western Refining, Inc. ("WRI"), Giant Industries, Inc. ("GII"), Western Refining Southwest, Inc. ("WRSI"), Tesoro Refining & Marketing Company LLC ("TRMC"), and Tesoro Logistics GP, LLC ("TLGP"). TAC is also a member of the Reporting Group and, as described below, is filing this separate Form 4 related to the same events.

F2 · price: On July 30, 2019 (the "Effective Time"), pursuant to the Agreement and Plan of Merger, dated as of May 7, 2019, by and among the Issuer, Andeavor Logistics LP ("ANDX"), TLGP, the General Partner and MPLX MAX LLC ("Merger Sub"), Merger Sub merged with and into ANDX (the "Merger"), with ANDX surviving the Merger as a wholly owned subsidiary of the Issuer.

F7 · price: At the Effective Time, each TexNew Mex Unit of ANDX held by WRSI prior to the Effective Time was converted into the right to receive a TexNew Mex Unit of the Issuer, a new class of limited partner units in the Issuer with substantially the same rights, powers, duties and obligations as the TexNew Mex Units of ANDX. MPC and certain of the other Reporting Persons may be deemed to beneficially own all of the TexNew Mex Units of MPLX owned by WRSI, but each disclaims beneficial ownership of such securities except to the extent of each Reporting Person's pecuniary interest therein.

F1 · ownership.nature: This Form 4 is submitted by Tesoro Alaska Company LLC ("TAC") with respect to certain transactions involving the securities of the Issuer by a Reporting Group consisting of Marathon Petroleum Corporation ("MPC"), MPC Investment LLC ("MPC Investment"), MPLX GP LLC (the "General Partner"), MPLX Logistics Holdings LLC ("Logistics Holdings"), Andeavor LLC, Western Refining, Inc. ("WRI"), Giant Industries, Inc. ("GII"), Western Refining Southwest, Inc. ("WRSI"), Tesoro Refining & Marketing Company LLC ("TRMC"), and Tesoro Logistics GP, LLC ("TLGP"). TAC is also a member of the Reporting Group and, as described below, is filing this separate Form 4 related to the same events.

F6 · ownership.nature: MPC Investment, a direct wholly owned subsidiary of MPC, owns all of the membership interests in the General Partner and Logistics Holdings. Andeavor LLC is a wholly owned subsidiary of MPC. WRI is a wholly owned subsidiary of Andeavor LLC. GII is a wholly owned subsidiary of WRI. WRSI is a wholly owned subsidiary of GII. TRMC and TAC are wholly owned subsidiaries of WRSI.

F7 · ownership.nature: At the Effective Time, each TexNew Mex Unit of ANDX held by WRSI prior to the Effective Time was converted into the right to receive a TexNew Mex Unit of the Issuer, a new class of limited partner units in the Issuer with substantially the same rights, powers, duties and obligations as the TexNew Mex Units of ANDX. MPC and certain of the other Reporting Persons may be deemed to beneficially own all of the TexNew Mex Units of MPLX owned by WRSI, but each disclaims beneficial ownership of such securities except to the extent of each Reporting Person's pecuniary interest therein.

SEC source: 0001209191-19-044127 · doc4.xml · nonDerivative · entry 1

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

Tesoro Alaska Co LLC · CIK 0000911614 · Less than 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: 665,997,540

F1 · price: This Form 4 is submitted by Tesoro Alaska Company LLC ("TAC") with respect to certain transactions involving the securities of the Issuer by a Reporting Group consisting of Marathon Petroleum Corporation ("MPC"), MPC Investment LLC ("MPC Investment"), MPLX GP LLC (the "General Partner"), MPLX Logistics Holdings LLC ("Logistics Holdings"), Andeavor LLC, Western Refining, Inc. ("WRI"), Giant Industries, Inc. ("GII"), Western Refining Southwest, Inc. ("WRSI"), Tesoro Refining & Marketing Company LLC ("TRMC"), and Tesoro Logistics GP, LLC ("TLGP"). TAC is also a member of the Reporting Group and, as described below, is filing this separate Form 4 related to the same events.

F2 · price: On July 30, 2019 (the "Effective Time"), pursuant to the Agreement and Plan of Merger, dated as of May 7, 2019, by and among the Issuer, Andeavor Logistics LP ("ANDX"), TLGP, the General Partner and MPLX MAX LLC ("Merger Sub"), Merger Sub merged with and into ANDX (the "Merger"), with ANDX surviving the Merger as a wholly owned subsidiary of the Issuer.

F3 · price: At the Effective Time, each common unit representing limited partner interests in ANDX held by each of WRSI and TLGP was converted into the right to receive 1.0328 common units representing limited partner interests in the Issuer (such conversion, the "Common Unit Conversion"). As a result of the Common Unit Conversion, WRSI received 69,763,859 common units representing limited partner interests in the Issuer and TLGP received 91,531,747 common units representing limited partner interests in the Issuer.

F4 · price: All of the membership interests in TLGP are held by TRMC, TAC and WRSI. Accordingly, MPC Investment, the General Partner, Logistics Holdings, Andeavor LLC, WRI, GII, WRSI, TRMC, TAC and TLGP are all direct or indirect wholly owned subsidiaries of MPC.

F5 · price: The closing price of common units representing limited partner interests in the Issuer on July 29, 2019, which was the last complete trading day prior to Effective Time, was $28.51 as reported on the New York Stock Exchange. MPC and certain of the other Reporting Persons may be deemed to beneficially own all of the common units representing limited partner interests in the Issuer owned by each of WRSI and TLGP, but each disclaims beneficial ownership of such securities except to the extent of each Reporting Person's pecuniary interest therein.

F6 · price: MPC Investment, a direct wholly owned subsidiary of MPC, owns all of the membership interests in the General Partner and Logistics Holdings. Andeavor LLC is a wholly owned subsidiary of MPC. WRI is a wholly owned subsidiary of Andeavor LLC. GII is a wholly owned subsidiary of WRI. WRSI is a wholly owned subsidiary of GII. TRMC and TAC are wholly owned subsidiaries of WRSI.

F1 · ownership.nature: This Form 4 is submitted by Tesoro Alaska Company LLC ("TAC") with respect to certain transactions involving the securities of the Issuer by a Reporting Group consisting of Marathon Petroleum Corporation ("MPC"), MPC Investment LLC ("MPC Investment"), MPLX GP LLC (the "General Partner"), MPLX Logistics Holdings LLC ("Logistics Holdings"), Andeavor LLC, Western Refining, Inc. ("WRI"), Giant Industries, Inc. ("GII"), Western Refining Southwest, Inc. ("WRSI"), Tesoro Refining & Marketing Company LLC ("TRMC"), and Tesoro Logistics GP, LLC ("TLGP"). TAC is also a member of the Reporting Group and, as described below, is filing this separate Form 4 related to the same events.

F3 · ownership.nature: At the Effective Time, each common unit representing limited partner interests in ANDX held by each of WRSI and TLGP was converted into the right to receive 1.0328 common units representing limited partner interests in the Issuer (such conversion, the "Common Unit Conversion"). As a result of the Common Unit Conversion, WRSI received 69,763,859 common units representing limited partner interests in the Issuer and TLGP received 91,531,747 common units representing limited partner interests in the Issuer.

F6 · ownership.nature: MPC Investment, a direct wholly owned subsidiary of MPC, owns all of the membership interests in the General Partner and Logistics Holdings. Andeavor LLC is a wholly owned subsidiary of MPC. WRI is a wholly owned subsidiary of Andeavor LLC. GII is a wholly owned subsidiary of WRI. WRSI is a wholly owned subsidiary of GII. TRMC and TAC are wholly owned subsidiaries of WRSI.

SEC source: 0001209191-19-044119 · doc4.xml · nonDerivative · entry 1

Goff Gregory James · CIK 0001490987 · Director

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 389,801.46

F1 · price: On July 30, 2019 (the "Effective Time"), pursuant to the Agreement and Plan of Merger, dated as of May 7, 2019 (the "Merger Agreement"), by and among the Issuer, Andeavor Logistics LP ("ANDX"), Tesoro Logistics GP, LLC, MPLX GP LLC and MPLX MAX LLC ("Merger Sub"), Merger Sub merged with and into ANDX (the "Merger"), with ANDX surviving the Merger as a wholly owned subsidiary of the Issuer.

F2 · price: Pursuant to the Merger Agreement, at the Effective Time, each common unit representing a limited partner interest in ANDX held by the Reporting Person was converted into the right to receive 1.135 common units (the "Public Unitholder Exchange Ratio") representing limited partner interests in the Issuer (such conversion, the "Common Unit Conversion"). As a result of the Common Unit Conversion, the Reporting Person received 193,490.151 common units representing limited partnership interests in the Issuer. The closing price of common units representing limited partner interests in the Issuer ("MPLX Common Units") on July 29, 2019, which was the last complete trading day prior to the Effective Time, was $28.51 as reported on the New York Stock Exchange.

F3 · price: Pursuant to the Merger Agreement, each phantom unit of ANDX held by the Reporting Person was converted, at the Effective Time, into a phantom unit denominated in common units representing limited partner interests in the Issuer (each, a "Converted MPLX Phantom Unit"), with the number of such common units subject to each Converted MPLX Phantom Unit equal to the product of (x) the number of common units representing limited partnership interests in ANDX subject to such phantom units of ANDX held by the Reporting Person immediately prior to Effective Time multiplied by (y) the Public Unitholder Exchange Ratio (such conversion, the "Phantom Unit Conversion"). As a result of the Phantom Unit Conversion, the Reporting Person received 147,438 phantom units in respect of MPLX Common Units.

F4 · balance_after: All reported amounts are estimated as of August 1, 2019 based on preliminary information with respect to the Merger. Final amounts will be reported in a subsequent filing.

SEC source: 0001209191-19-040782 · doc4.xml · nonDerivative · entry 1

STICE J MICHAEL · CIK 0001497306 · Director

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 5,785.487

SEC source: 0001209191-19-040779 · doc4.xml · nonDerivative · entry 1

SEMPLE FRANK M · CIK 0001270065 · Director

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 9,650.932

SEC source: 0001209191-19-040777 · doc4.xml · nonDerivative · entry 1

SANDMAN DAN D · CIK 0001236159 · Director

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 61,241.816

SEC source: 0001209191-19-040756 · doc4.xml · nonDerivative · entry 1

BEATTY MICHAEL L · CIK 0001265194 · Director

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 38,687.083

SEC source: 0001209191-19-040785 · doc4.xml · nonDerivative · entry 1

SURMA JOHN P · CIK 0001229767 · Director

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 27,983.702

SEC source: 0001209191-19-040758 · doc4.xml · nonDerivative · entry 1

HELMS CHRISTOPHER A · CIK 0001186805 · Director

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 28,241.817

SEC source: 0001209191-19-040701 · doc4.xml · nonDerivative · entry 1

Hennigan Michael J · CIK 0001352283 · Director · President

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 137,305

SEC source: 0001209191-19-040763 · doc4.xml · nonDerivative · entry 1

Peiffer Garry L. · CIK 0001521094 · Director

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 14,302.313

SEC source: 0001209191-19-030680 · doc4.xml · nonDerivative · entry 1

STICE J MICHAEL · CIK 0001497306 · Director

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 4,797.421

SEC source: 0001209191-19-030683 · doc4.xml · nonDerivative · entry 1

SEMPLE FRANK M · CIK 0001270065 · Director

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 8,798.483

SEC source: 0001209191-19-030676 · doc4.xml · nonDerivative · entry 1

BEATTY MICHAEL L · CIK 0001265194 · Director

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 37,834.634

SEC source: 0001209191-19-030679 · doc4.xml · nonDerivative · entry 1

SANDMAN DAN D · CIK 0001236159 · Director

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 60,389.367

SEC source: 0001209191-19-030681 · doc4.xml · nonDerivative · entry 1

SURMA JOHN P · CIK 0001229767 · Director

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 26,995.636

SEC source: 0001209191-19-030677 · doc4.xml · nonDerivative · entry 1

HELMS CHRISTOPHER A · CIK 0001186805 · Director

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 27,389.368

SEC source: 0001209191-19-030678 · doc4.xml · nonDerivative · entry 1

Peiffer Garry L. · CIK 0001521094 · Director

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 13,449.864