MPLX LP - FORM 8-K - EX-10.1 - EXHIBIT 10.1

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SERIES A PREFERRED UNIT

PURCHASE AGREEMENT

among

MPLX LP

and

THE PURCHASERS PARTY HERETO

April 27, 2016

TABLE OF CONTENTS



			Page
Article I. DEFINITIONS			1
	Section 1.01	Definitions	1
	Section 1.02	Accounting Procedures and Interpretation	7

Article II. AGREEMENT TO SELL AND PURCHASE			7
	Section 2.01	Sale and Purchase	7
	Section 2.02	Deliveries at the Closing	7
	Section 2.03	Independent Nature of Purchasers’ Obligations and Rights	9
	Section 2.04	Further Assurances	9

Article III. REPRESENTATIONS AND WARRANTIES AND COVENANTS
	RELATED TO THE PARTNERSHIP		9
	Section 3.01	Existence.	10
	Section 3.02	Capitalization and Valid Issuance of Units	10
	Section 3.03	Ownership of the Material Subsidiaries	11
	Section 3.04	MPLX SEC Documents	12
	Section 3.05	Financial Statements	12
	Section 3.06	Independent Registered Public Accounting Firm	13
	Section 3.07	No Material Adverse Change	13
	Section 3.08	No Registration Required	13
	Section 3.09	No Preemptive Rights; Registration Rights Priority	13
	Section 3.10	Litigation	13
	Section 3.11	No Default	14
	Section 3.12	No Conflicts	14
	Section 3.13	Authority: Enforceability	14
	Section 3.14	Approvals	15
	Section 3.15	Distribution Restrictions	15
	Section 3.16	MLP Status	15
	Section 3.17	Investment Company Status	15
	Section 3.18	Certain Fees	16
	Section 3.19	Labor and Employment Matters	16
	Section 3.20	Insurance	16
	Section 3.21	Internal Controls	16
	Section 3.22	Disclosure Controls	16
	Section 3.23	Sarbanes-Oxley	17
	Section 3.24	Listing and Maintenance Requirements	17
	Section 3.25	Environmental Compliance	17
	Section 3.26	ERISA Compliance	18
	Section 3.27	Tax Returns; Taxes	18
	Section 3.28	Permits	19



	Section 3.29	Required Disclosures and Descriptions	19
	Section 3.30	Title to Property	19
	Section 3.31	Rights-of-Way	19
	Section 3.32	Form S-3 Eligibility	20
	Section 3.33	FCPA	20
	Section 3.34	Money Laundering Laws	20
	Section 3.35	OFAC	20
	Section 3.36	Related Party Transactions	20
	Section 3.37	No Side Agreements	20

Article IV. REPRESENTATIONS AND WARRANTIES AND COVENANTS OF
	THE PURCHASERS		21
	Section 4.01	Existence	21
	Section 4.02	Authorization, Enforceability	21
	Section 4.03	No Breach	21
	Section 4.04	Certain Fees	21
	Section 4.05	Unregistered Securities	21
	Section 4.06	Sufficient Funds	23
	Section 4.07	No Prohibited Trading	23

Article V. COVENANTS			23
	Section 5.01	Conduct of Business	23
	Section 5.02	Listing of Units	23
	Section 5.03	Cooperation; Further Assurances	24
	Section 5.04	Lock-up Agreement	24
	Section 5.05	Tax Estimates	25

Article VI. INDEMNIFICATION, COSTS AND EXPENSES			25
	Section 6.01	Indemnification by the Partnership	25
	Section 6.02	Indemnification by the Purchasers	26
	Section 6.03	Indemnification Procedure	27
	Section 6.04	Tax Matters	28

Article VII. TERMINATION			28
	Section 7.01	Termination	28
	Section 7.02	Certain Effects of Termination	28

Article VIII. MISCELLANEOUS			29
	Section 8.01	Expenses	29
	Section 8.02	Interpretation	29
	Section 8.03	Survival of Provisions	30
	Section 8.04	No Waiver: Modifications in Writing	30
	Section 8.05	Binding Effect	31



	Section 8.06	Non-Disclosure	31
	Section 8.07	Communications	32
	Section 8.08	Removal of Legend	32
	Section 8.09	Entire Agreement	33
	Section 8.10	Assignment	33
	Section 8.11	Governing Law: Submission to Jurisdiction	34
	Section 8.12	Waiver of Jury Trial	34
	Section 8.13	Exclusive Remedy	34
	Section 8.14	No Recourse Against Others	35
	Section 8.15	No Third-Party Beneficiaries	36
	Section 8.16	Execution in Counterparts	36


SCHEDULE A - Purchase Price Allocation
SCHEDULE B - Material Subsidiaries

EXHIBIT A - Form of Opinion of Vinson & Elkins L.L.P.
EXHIBIT B - Form of Second A&R Limited Partnership Agreement
EXHIBIT C - Form of Registration Rights Agreement
EXHIBIT D - Form of Joinder Agreement
EXHIBIT E - Form of General Partner Waiver

iii

SERIES A PREFERRED UNIT PURCHASE AGREEMENT

This SERIES A PREFERRED UNIT PURCHASE AGREEMENT, dated as of April 27, 2016 (this “Agreement”), is entered into by and among MPLX LP, a Delaware limited partnership (the “Partnership”) and the purchasers set forth in Schedule A hereto (the “Purchasers”).

WHEREAS, the Partnership desires to issue and sell to the Purchasers, and the Purchasers desire to purchase from the Partnership, the Purchased Units (as defined below), in accordance with the provisions of this Agreement; and

WHEREAS, the Partnership has agreed to provide the Purchasers with certain registration rights with respect to the Preferred Units and the Conversion Units (as defined below) underlying the Purchased Units acquired pursuant hereto.

NOW THEREFORE, in consideration of the mutual covenants and agreements set forth herein and for good and valuable consideration, the receipt and sufficiency of which is hereby acknowledged, the parties hereby agree as follows:

ARTICLE I.

DEFINITIONS

Section 1.01 Definitions. As used in this Agreement, the following terms have the meanings indicated:

“Affiliate” means, with respect to any Person, any other Person that directly or indirectly through one or more intermediaries controls, is controlled by or is under common control with, the Person in question. As used herein, the term “control” means the possession, direct or indirect, of the power to direct or cause the direction of the management and policies of a Person, whether through ownership of voting securities, by contract or otherwise. For the avoidance of doubt, for purposes of this Agreement, (a) the Partnership Entities, on the one hand, and any Purchaser, on the other, shall not be considered Affiliates and (b) any fund or account managed, advised or subadvised, directly or indirectly, by a Purchaser or its Affiliates, shall be considered an Affiliate of such Purchaser.

“Agreement” has the meaning set forth in the introductory paragraph of this Agreement.

“Business Day” means any day other than a Saturday, Sunday, any federal legal holiday or day on which banking institutions in the State of New York or State of Texas are authorized or required by Law or other governmental action to close.

“Class A Unit” has the meaning given to such term in the Partnership Agreement.

“Class B Unit” has the meaning given to such term in the Partnership Agreement.

“Closing” has the meaning specified in Section 2.01.

“Closing Date” means May 13, 2016, or such other later date as the Partnership and Stonepeak shall agree to in writing.

“Commission” means the United States Securities and Exchange Commission.

“Common Units” means common units representing limited partner interests in the Partnership.

“Confidentiality Agreements” means the Confidentiality Agreements, dated on or about February 9, 2016, March 31, 2016 or April 12, 2016, entered into by the Partnership and each of the Purchasers or their Affiliates, as applicable, as may be amended from time to time.

“Consent” has the meaning set forth in Section 3.14.

“Contract” means any contract, agreement, indenture, note, bond, mortgage, deed of trust, loan, instrument, lease, license, commitment or other arrangement, understanding, undertaking, commitment, obligation or instrument, whether written or oral.

“Conversion Units” means the Common Units issuable upon conversion of the Purchased Units.

“Credit Facilities” means (a) the Credit Agreement, dated as of November 20, 2014, as amended, by and among the Partnership, as borrower, Wells Fargo Bank, National Association, as administrative agent, and the other lenders and issuing banks that are parties thereto and (b) the Loan Agreement, by and between the Partnership and MPC Investment LLC, dated December 4, 2015.

“Cross-Receipt” means a cross-receipt, in a form to be agreed by the parties, executed by (a) the General Partner, on behalf of the Partnership, certifying that the Partnership has received from the Purchasers an aggregate amount in cash equal to the Total Funding Obligation net of the Transaction Fee, and (b) each of the Purchasers certifying that such Purchaser has received from the Partnership the number of Series A Preferred Units set forth opposite such Purchaser’s name on Schedule A.

“Delaware LP Act” means the Delaware Revised Uniform Limited Partnership Act.

“Disclosure Letter” means the disclosure letter provided by the Partnership to the Purchasers dated as of the date hereof.

“Environmental Law” means any and all applicable Laws relating to human health or safety (to the extent such health or safety relates to exposure to Hazardous Materials) or the protection, cleanup or restoration of the environment or natural resources, including those relating to the distribution, processing, generation, treatment, storage, disposal, transportation, other handling or release or threatened release of Hazardous Materials.

“Environmental Proceedings” has the meaning set forth in Section 3.25.

“Exchange Act” means the Securities Exchange Act of 1934, as amended from time to time, and the rules and regulations of the Commission promulgated thereunder.

“Funding Obligation” means, with respect to a particular Purchaser, an amount equal to the Unit Purchase Price multiplied by the number of Purchased Units to be purchased by such Purchaser on the Closing Date, as set forth opposite such Purchaser’s name on Schedule A.

“GAAP” means generally accepted accounting principles in the United States of America as of the date hereof; provided that for the financial statements of the Partnership prepared as of a certain date, GAAP referenced therein shall be GAAP as of the date of such financial statements.

“General Partner” means MPLX GP LLC, a Delaware limited liability company, and the general partner of the Partnership.

“Governmental Authority” means, with respect to a particular Person, any country, state, county, city and political subdivision in which such Person or such Person’s Property is located or which exercises valid jurisdiction over any such Person or such Person’s Property, and any court, agency, department, commission, board, bureau or instrumentality of any of them and any monetary authority which exercises valid jurisdiction over any such Person or such Person’s Property. Unless otherwise specified, all references to Governmental Authority herein with respect to the Partnership mean a Governmental Authority having jurisdiction over the Partnership Entities or any of their respective Properties.

“Hazardous Materials” means any material (including, without limitation, any pollutant, contaminant, or other hazardous or toxic chemical, substance or waste) that is regulated by or may give rise to liability under any Environmental Law.

“Incentive Distribution Rights” has the meaning specified in Section 3.02(a).

“Indemnified Party” has the meaning specified in Section 6.03(b).

“Indemnifying Party” has the meaning specified in Section 6.03(b).

“Joinder Agreement” has the meaning set forth in Section 8.10.

“Knowledge” means, with respect to the Partnership or the MPLX Parties, the actual knowledge of Gary R. Heminger, C. Corwin Bromley, Nancy K. Buese and Joshua P. Hallenbeck.

“Law” means any federal, state, local or foreign order, writ, injunction, judgment, settlement, award, decree, statute, law (including common law), rule or regulation.

“Lien” means any mortgage, pledge, lien (statutory or otherwise), encumbrance, security interest, security agreement, conditional sale, trust receipt, charge or claim or a lease, consignment or bailment, preference or priority, assessment, deed of trust, easement, servitude or other encumbrance upon or with respect to any property of any kind.

“MarkWest Acquisition” means the merger of a wholly-owned subsidiary of the Partnership with MarkWest Energy Partners, L.P., a Delaware limited partnership, which was completed on December 4, 2015.

“Material Adverse Effect” means any change, event or effect that, individually or together with any other changes, events or effects, has had or would reasonably be expected to have a material adverse effect on (a) the condition (financial or otherwise), business, prospects, Properties, assets, net worth or results of operations of the MPLX Entities, taken as a whole, or (b) the ability of the Partnership or the General Partner, as applicable, to perform its obligations under the Transaction Documents; provided, however, that a Material Adverse Effect shall not include any adverse effect on the foregoing to the extent such adverse effect results from, arises out of, or relates to (i) a general deterioration in the economy or changes in the general state of the markets or industries in which any of the Partnership Entities operates (including, for the avoidance of doubt, adverse changes (A) in commodity prices, (B) in aggregate capital spending by energy sector participants or their customers, (C) in production profiles in oil and gas producing basins in North America and (D) otherwise associated with the effects of distress in the energy sector as of the date of this Agreement and the resulting effect on the Partnership Entities, taken as a whole), except, with respect to this clause (i), to the extent that such Partnership Entities, taken as a whole, are adversely affected in a disproportionate manner as compared to other industry participants, (ii) any deterioration in the condition of the capital markets or any inability on the part of the MPLX Entities to access the capital markets, (iii) the outbreak or escalation of hostilities involving the United States, the declaration by the United States of a national emergency, acts of war (whether or not declared) or the occurrence of any other calamity or crisis, including acts of terrorism, hurricane, flood, tornado, earthquake or other natural disaster, (iv) any change in accounting requirements or principles imposed upon the MPLX Entities or their respective businesses or any change in applicable Law, or the interpretation thereof, other than a change that would result in the Partnership being treated as a corporation for United States federal tax purposes, (v) any change in the credit rating and/or outlook of MPC or any of the Partnership Entities or any of their securities (except that the underlying causes of any such changes may be considered in determining whether a Material Adverse Effect has occurred, subject to the other provisions of this definition), (vi) changes in the market price or trading volume of the Common Units (except that the underlying causes of any such changes may be considered in determining whether a Material Adverse Effect has occurred, subject to the other provisions of this definition) or (vii) any failure of the Partnership to meet any internal or external projections, forecasts or estimates of revenue or earnings for any period (except that the underlying causes of any such failures may be considered in determining whether a Material Adverse Effect has occurred, subject to the other provisions of this definition).

“Material Subsidiaries” means the Subsidiaries of the Partnership listed on Schedule B attached hereto.

“Money-Laundering Laws” has the meaning set forth in Section 3.32.

“MPC” means Marathon Petroleum Corporation, a Delaware corporation, which indirectly owns the General Partner.

“MPLX Entities” means, collectively, the Partnership and the Partnership’s majority-owned Subsidiaries.

“MPLX Parties” means, collectively, the General Partner and the Partnership.

“MPLX SEC Documents” the Partnership’s forms, registration statements, reports, schedules and statements filed by it under the Exchange Act or the Securities Act, as applicable.

“National Securities Exchange” means an exchange registered with the Commission under Section 6(a) of the Exchange Act.

“Non-Affiliate Transfer Period” has the meaning set forth in Section 5.04.

“NYSE” means the New York Stock Exchange.

“OFAC” has the meaning set forth in Section 3.33.

“Organizational Documents” means, as applicable, an entity’s agreement of limited partnership, certificate of limited partnership, limited liability company agreement, certificate of formation, certificate or articles of incorporation, bylaws or other similar organizational documents.

“Partnership” has the meaning set forth in the introductory paragraph of this Agreement.

“Partnership Agreement” means the First Amended and Restated Agreement of Limited Partnership of the Partnership, dated as of October 31, 2012, as amended from time to time in accordance with the terms thereof (including, as the context requires, by the Second A&R LPA).

“Partnership Entities” means, collectively, the General Partner and the MPLX Entities.

“Partnership Related Parties” has the meaning specified in Section 6.02.

“Permits” has the meaning set forth in Section 3.28.

“Person” means any individual, corporation, company, voluntary association, partnership, joint venture, trust, limited liability company, unincorporated organization, government or any agency, instrumentality or political subdivision thereof or any other form of entity.

“Piggyback Registration” has the meaning given to such term in the Registration Rights Agreement.

“Property” means any interest in any kind of property or asset, whether real, personal or mixed, or tangible or intangible (including intellectual property rights).

“Purchase Price” means the Total Funding Obligation.

“Purchased Units” has the meaning specified in Section 2.01.

“Purchaser Related Parties” has the meaning specified in Section 6.01.

“Purchasers” has the meaning set forth in the introductory paragraph of this Agreement.

“Registration Rights Agreement” means the Registration Rights Agreement, to be entered into at the Closing, between the Partnership and the Purchasers, substantially in the form attached hereto as Exhibit C.

“Representatives” means, with respect to a specified Person, the investors, officers, directors, managers, employees, agents, advisors, counsel, accountants, investment bankers and other representatives of such Person.

“Rights-of-Way” has the meaning specified in Section 3.30.

“Second A&R LPA” has the meaning specified in Section 2.02(a)(ii).

“Securities Act” means the Securities Act of 1933, as amended from time to time, and the rules and regulations of the Commission promulgated thereunder.

“Series A Preferred Units” means the Partnership’s Series A Convertible Preferred Units.

“Stonepeak” means Stonepeak Finland Holdings LLC, a Delaware limited liability company.

“Subsidiary” means, as to any Person, any corporation or other entity of which: (a) such Person or a Subsidiary of such Person is a general partner or, in the case of a limited liability company, the managing member or manager thereof; (b) at least a majority of the outstanding equity interest having by the terms thereof ordinary voting power to elect a majority of the board of directors or similar governing body of such corporation or other entity (irrespective of whether or not at the time any equity interest of any other class or classes of such corporation or other entity shall have or might have voting power by reason of the happening of any contingency) is at the time directly or indirectly owned or controlled by such Person or one or more of its Subsidiaries; or (c) any corporation or other entity as to which such Person consolidates for accounting purposes.

“Taxes” means any and all domestic or foreign, federal, state, local or other taxes of any kind (together with any and all interest, penalties, additions to tax and additional amounts imposed with respect thereto) imposed by any Governmental Authority, including taxes on or with respect to income, franchises, windfall or other profits, gross receipts, property, sales, use, capital stock, payroll, employment, unemployment, social security, workers’ compensation or net worth, and taxes in the nature of excise, withholding, ad valorem or value added, and including any liability in respect of any items described above as a transferee or successor, pursuant to Section 1.1502-6 of the Treasury Regulations (or any similar provision of state, local or foreign Law), or as an indemnitor, guarantor, surety or in a similar capacity under any Contract.

“Tax Return” means any return, report or similar filing (including the attached schedules) filed or required to be filed with respect to Taxes (and any amendments thereto), including any information return, claim for refund or declaration of estimated Taxes.

“Third-Party Claim” has the meaning specified in Section 6.03(b).

“Total Funding Obligation” means the aggregate amount of Funding Obligations of all of the Purchasers participating in the Closing.

“Transaction Documents” means, collectively, this Agreement, the Registration Rights Agreement, the Second A&R LPA and any and all other agreements or instruments executed and delivered to the Purchasers by the Partnership or the General Partner hereunder or thereunder, as applicable.

“Transaction Fee” has the meaning specified in Section 8.01.

“Unit Purchase Price” has the meaning specified in Section 2.01

Section 1.02 Accounting Procedures and Interpretation. Unless otherwise specified herein, all accounting terms used herein shall be interpreted, all determinations with respect to accounting matters hereunder shall be made, and all financial statements of the Partnership and certificates and reports as to financial matters required to be furnished to the Purchasers hereunder shall be prepared, in accordance with GAAP applied on a consistent basis during the periods involved (except as may be indicated in the notes thereto or, in the case of unaudited statements, as permitted by Form 10-Q promulgated by the Commission) and in compliance as to form in all material respects with applicable accounting requirements and with the published rules and regulations of the Commission with respect thereto.

ARTICLE II.

AGREEMENT TO SELL AND PURCHASE

Section 2.01 Sale and Purchase. On the Closing Date, subject to the terms and conditions hereof, each Purchaser hereby agrees to purchase from the Partnership, and the Partnership hereby agrees to issue and sell to each Purchaser, the number of Series A Preferred Units in the Purchased Units column set forth opposite each Purchaser’s name on Schedule A (the “Purchased Units”) for a cash purchase price of $32.50 per Purchased Unit (the “Unit Purchase Price”). The consummation of the purchase and sale of the Purchased Units hereunder (the “Closing”) shall take place on the Closing Date at the offices of Vinson & Elkins L.L.P., 1001 Fannin, Suite 2500, Houston, Texas 77002.

Section 2.02 Deliveries at the Closing.

(a) Deliveries of the Partnership. At the Closing, the Partnership shall deliver or cause to be delivered to the Purchasers:

(i) An opinion from Vinson & Elkins L.L.P., counsel for the Partnership, in substantially the form attached hereto as Exhibit A, which shall be addressed to the Purchasers and dated the Closing Date;

(ii) A fully-executed copy of the Second Amended and Restated Agreement of Limited Partnership of the Partnership, substantially in the form attached hereto as Exhibit B (the “Second A&R LPA”);

(iii) A counterpart of the Registration Rights Agreement executed by the General Partner on behalf of the Partnership;

(iv) A counterpart of any Joinder Agreement required by Section 8.10 hereof.

(v) A fully-executed “Supplemental Listing Application,” countersigned by the NYSE, approving the Conversion Units for listing by the NYSE

(vi) A duly executed waiver of the General Partner with respect to certain of its rights under the Partnership Agreement, in substantially the form attached hereto as Exhibit E;

(vii) Evidence of issuance of the Purchased Units credited to book-entry accounts maintained by the transfer agent of the Partnership, bearing a restrictive notation meeting the requirements of the Partnership Agreement, free and clear of any Liens, other than transfer restrictions under this Agreement, the Partnership Agreement or the Delaware LP Act and applicable federal and state securities Laws;

(viii) A certificate of the Secretary or Assistant Secretary of the General Partner, on behalf of the Partnership, dated the Closing Date, certifying as to and attaching (A) the certificate of formation of the Partnership, (B) the Partnership Agreement, (C) board resolutions authorizing the execution and delivery of the Transaction Documents and the consummation of the transactions contemplated thereby, including the issuance of the Purchased Units and the Conversion Units, and (D) the incumbency of the officers authorized to execute the Transaction Documents on behalf of the Partnership or the General Partner, as applicable, setting forth the name and title and bearing the signatures of such officers;

(ix) A counterpart of a Cross-Receipt executed by the General Partner on behalf of the Partnership; and

(x) A certificate of the Secretary of State of each applicable state, dated on or after April 25, 2016, to the effect that each of the MPLX Parties and the Material Subsidiaries is in good standing in its jurisdiction of formation;

(xi) Such other documents relating to the transactions contemplated by this Agreement as the Purchasers or their counsel may reasonably request.

(b) Deliveries of Each Purchaser. At the Closing, each Purchaser shall deliver or cause to be delivered to the Partnership:

(i) A counterpart of the Registration Rights Agreement executed by such Purchaser;

(ii) A counterpart of the Cross-Receipt executed by such Purchaser;

(iii) A counterpart of any Joinder Agreement required by Section 8.10 hereof executed by such Purchaser.

(iv) Payment of such Purchaser’s Funding Obligation (which payment will be made by netting the portion of the Transaction Fee due to such Purchaser from such Purchaser’s Funding Obligation) payable by wire transfer of immediately available funds to an account designated in advance of the Closing Date by the Partnership;

(v) A properly executed Internal Revenue Service Form W-9 from such Purchaser; and

(vi) Such other documents relating to the transactions contemplated by this Agreement as the Partnership or its counsel may reasonably request.

Section 2.03 Independent Nature of Purchasers’ Obligations and Rights. The obligations of each Purchaser under any Transaction Document are several and not joint with the obligations of any other Purchaser, and no Purchaser shall be responsible in any way for the performance of the obligations of any other Purchaser under any Transaction Document. Each Purchaser acknowledges by executing this Agreement that such Purchaser is irrevocably committed to purchase the Purchased Units in accordance with the terms of this Agreement, and such purchase is not subject to any conditions precedent other than the deliverables contemplated by Section 2.02(a). The failure of any Purchaser to perform, or waiver by the Partnership of such performance, under any Transaction Document shall not excuse performance by any other Purchaser, and the waiver by any Purchaser of performance of the Partnership under any Transaction Document shall not excuse performance by the Partnership with respect to any other Purchaser. Nothing contained herein or in any other Transaction Document, and no action taken by any Purchaser pursuant thereto, shall be deemed to constitute the Purchasers as a partnership, an association, a joint venture or any other kind of group or entity, or create a presumption that the Purchasers are in any way acting in concert or as a group with respect to such obligations or the transactions contemplated by the Transaction Documents. Each Purchaser shall be entitled to independently protect and enforce its rights, including the rights arising out of this Agreement or out of the other Transaction Documents, and it shall not be necessary for any other Purchaser to be joined as an additional party in any proceeding for such purpose.

Section 2.04 Further Assurances. From time to time after the date hereof, without further consideration, the Partnership and each Purchaser shall use their commercially reasonable efforts to take, or cause to be taken, all actions necessary or appropriate to consummate the transactions contemplated by this Agreement.
ARTICLE III.

REPRESENTATIONS AND WARRANTIES AND
COVENANTS RELATED TO THE PARTNERSHIP

As of the date hereof, except as described in the Disclosure Letter, the Partnership represents and warrants to and covenants with the Purchasers as follows:

Section 3.01 Existence.

(a) Each of the Partnership Entities has been duly incorporated or formed, as the case may be, and is validly existing as a corporation, general partnership, limited partnership or limited liability company, as the case may be, and is in good standing under the Laws of the State of Delaware, the State of Michigan, the State of Oklahoma or the State of Texas, as the case may be, with full general partnership, limited partnership, limited liability company or corporate power and authority to own, lease and operate its Properties and to conduct its business as described in the MPLX SEC Documents and (i) to execute and deliver this Agreement and the other Transaction Documents to which such Partnership Entity is a party and consummate the transactions contemplated hereby and thereby, (ii) in the case of the Partnership, to issue, sell and deliver the Purchased Units and (iii) in the case of the General Partner, to act as the general partner of the Partnership.

(b) Each of the Partnership Entities is duly qualified to do business as a foreign limited partnership, partnership, corporation or limited liability company, as the case may be, and is in good standing in each jurisdiction where the ownership or lease of its Properties or the conduct of its business requires such qualification, except for any failures to be so qualified and in good standing that would not, individually or in the aggregate, (i) constitute a Material Adverse Effect or (ii) subject the limited partners of the Partnership to any material liability or disability.

(c) The Organizational Documents of each of the MPLX Parties and the Material Subsidiaries have been, and in the case of the Second A&R LPA, at the Closing will be, duly authorized, executed and delivered by any Partnership Entity party thereto (and, in the case of the Organizational Documents of the General Partner, by all parties thereto) and are, and in the case of the Second A&R LPA, at the Closing will be, valid and legally binding agreements of the applicable MPLX Party or Material Subsidiary, enforceable against such MPLX Party or Material Subsidiary in accordance with their respective terms; provided, that, with respect to each such agreement, the enforceability thereof may be limited by applicable bankruptcy, insolvency, fraudulent transfer, reorganization, moratorium or similar Laws from time to time in effect affecting creditors’ rights and remedies generally and by general principles of equity (regardless of whether such principles are considered in a proceeding in equity or at law).

Section 3.02 Capitalization and Valid Issuance of Units.

(a) As of the date hereof, and immediately prior to the issuance and sale of the Purchased Units, the issued and outstanding limited partner interests of the Partnership consist of 331,281,560 Common Units, 28,554,313 Class A Units, 7,981,756 Class B Units and the incentive distribution rights (as defined in the Partnership Agreement, the “Incentive Distribution Rights”). All outstanding Common Units, Class A Units, Class B Units, Incentive Distribution Rights and the limited partner interests represented thereby have been duly authorized and validly issued in accordance with the Partnership Agreement and are fully paid (to the extent required under the Partnership Agreement) and nonassessable (except as such nonassessability may be affected by matters described in Sections 17-303, 17-607 and 17-804 of the Delaware LP Act).

(b) The General Partner is the sole general partner of the Partnership, with a 2.0% general partner interest in the Partnership; such general partner interest has been duly authorized and validly issued in accordance with the Partnership Agreement; and the General Partner owns such general partner interest free and clear of all Liens, except for restrictions on transferability contained in the Delaware LP Act or the Partnership Agreement.

(c) The Purchased Units and the limited partner interests represented thereby will be duly authorized by the Partnership pursuant to the Partnership Agreement prior to the Closing and, when issued and delivered to the Purchasers against payment therefor in accordance with the terms of this Agreement, will be validly issued, fully paid (to the extent required by the Partnership Agreement) and nonassessable (except as such nonassessability may be affected by matters described in Sections 17-303, 17-607 and 17-804 of the Delaware LP Act) and will be free of any and all Liens and restrictions on transfer, other than (i) restrictions on transfer under the Partnership Agreement, this Agreement or applicable state and federal securities Laws, (ii) such Liens as are created by the Purchasers and (iii) such Liens as arise under the Partnership Agreement or the Delaware LP Act.

(d) Except for any such preemptive rights that have been waived or set forth in the Partnership Agreement, there are no persons entitled to statutory, preemptive or other similar contractual rights to subscribe for the Purchased Units; and, except (i) for the Purchased Units to be issued pursuant to this Agreement, (ii) for awards issued pursuant to the Partnership’s long-term incentive plans, (iii) as disclosed in the MPLX SEC Documents or (iv) the General Partner’s right to maintain its 2% general partnership interest in the Partnership, no options, warrants or other rights to purchase, agreements or other obligations to issue, or rights to convert any obligations into or exchange any securities for, partnership securities or ownership interests in the Partnership are outstanding.

(e) Upon issuance in accordance with this Agreement and the Partnership Agreement, the Conversion Units will be duly authorized, validly issued, fully paid (to the extent required by the Partnership Agreement) and nonassessable (except as such nonassessability may be affected by matters described in Sections 17-303, 17-607 and 17-804 of the Delaware LP Act) and will be free of any and all Liens and restrictions on transfer, other than (i) restrictions on transfer under the Transaction Documents or applicable state and federal securities Laws, (ii) such Liens as are created by the Purchasers and (iii) such Liens as arise under the Partnership Agreement or the Delaware LP Act.

(f) The Partnership Agreement sets forth the rights, preferences and priorities of the Purchased Units, and the holders of the Purchased Units will have the rights set forth in the Partnership Agreement upon the Closing.

Section 3.03 Ownership of the Material Subsidiaries. All of the outstanding shares of capital stock or other equity interests of each Material Subsidiary owned directly or indirectly by the Partnership (a) have been duly authorized and validly issued (in accordance with the Organizational Documents of such Material Subsidiary), and are fully paid (in the case of an interest in a limited partnership or limited liability company, to the extent required under the Organizational Documents of such Material Subsidiary) and nonassessable (except as such nonassessability may be affected by applicable Law of such Material Subsidiary’s jurisdiction of

formation), and, (b) except with respect to the entities identified on Schedule B as not wholly-owned, are wholly-owned, directly or indirectly, by the Partnership, free and clear of all Liens, except (i) restrictions on transferability in the Organizational Documents of such Material Subsidiary or (ii) Liens created or arising under the Credit Facilities. The Partnership indirectly owns the applicable membership interests set forth on Schedule B of the Material Subsidiaries that are not wholly-owned. As of the date hereof, the Partnership Subsidiaries other than the Material Subsidiaries would not have, individually or in the aggregate, on a pro forma basis giving effect to the MarkWest Acquisition as if it occurred on January 1, 2015, accounted for (A) more than 10% of the total assets of the MPLX Entities, taken as a whole, as of December 31, 2015 or (B) more than 10% of the net income of the MPLX Entities, taken as a whole, for the fiscal year ended December 31, 2015.

Section 3.04 MPLX SEC Documents. Since January 1, 2015, all the Partnership’s forms, registration statements, reports, schedules and statements required to be filed by it under the Exchange Act have been filed with the Commission on a timely basis. The MPLX SEC Documents, at the time filed (or in the case of registration statements, solely on the dates of effectiveness), except to the extent corrected by a subsequent MPLX SEC Document, (a) did not contain any untrue statement of a material fact or omit to state a material fact required to be stated therein or necessary in order to make the statements therein, in light of the circumstances under which they were made in the case of any such documents other than a registration statement, not misleading and (b) complied as to form in all material respects with the applicable requirements of the Exchange Act and the Securities Act, as the case may be.

Section 3.05 Financial Statements.

(a) The historical financial statements (including the related notes and supporting schedule) contained or incorporated by reference in the MPLX SEC Documents, (a) comply as to form in all material respects with the applicable accounting requirements under the Securities Act and the Exchange Act (except that certain supporting schedules are omitted), (b) present fairly in all material respects the financial position, results of operations and cash flows of the entities purported to be shown thereby on the basis stated therein at the respective dates or for the respective periods and (c) have been prepared in accordance with GAAP consistently applied throughout the periods involved, in each case except to the extent disclosed therein. The other financial information of the Partnership Entities, including non-GAAP financial measures, if any, contained or incorporated by reference in the MPLX SEC Documents has been derived from the accounting records of the Partnership Entities, and fairly presents in all material respects the information purported to be shown thereby. Nothing has come to the attention of the Partnership that has caused it to believe that the statistical and market-related data included in the MPLX SEC Documents is not based on or derived from sources that are reliable and accurate in all material respects as of the date on which the applicable MPLX SEC Documents were filed.

(b) Since the date of the most recent balance sheet of the Partnership audited by the Partnership’s auditor, (i) the interactive data in eXtensible Business Reporting Language included or incorporated by reference in the MPLX SEC Documents fairly presents the information called for in all material respects and has been prepared in accordance with the Commission’s rules and guidelines applicable thereto in all material respects and (ii) based on an

annual evaluation of disclosure controls and procedures, the Partnership is not aware of (A) any significant deficiency or material weakness in the design or operation of internal controls over financial reporting that are likely to adversely affect its ability to record, process, summarize and report financial data or (B) any fraud, whether or not material, that involves management or other employees who have a significant role in the internal controls over financial reporting of the Partnership.

Section 3.06 Independent Registered Public Accounting Firm. PricewaterhouseCoopers LLP, which has audited the financial statements of the Partnership and its consolidated subsidiaries and delivered its report with respect to the audited consolidated financial statements financial statements contained or incorporated by reference in the MPLX SEC Documents, is an independent registered public accounting firm with respect to the Partnership and the General Partner within the meaning of the Securities Act and the applicable rules and regulations thereunder adopted by the Commission and the Public Company Accounting Oversight Board (United States). PricewaterhouseCoopers LLP has not resigned or been dismissed as independent registered public accountants of the Partnership as a result of or in connection with any disagreement with the Partnership on any matter of accounting principles or practices, financial statement disclosure or auditing scope or procedures.

Section 3.07 No Material Adverse Change. Since December 31, 2015, except as described in the MPLX SEC Documents, there has not been any Material Adverse Effect.

Section 3.08 No Registration Required. Assuming the accuracy of the representations and warranties of each Purchaser contained in Article IV, the issuance and sale of the Purchased Units pursuant to this Agreement is exempt from registration requirements of the Securities Act, and neither the Partnership nor, to the Partnership’s Knowledge, any Person acting on its behalf has taken or will take any action hereafter that would cause the loss of such exemption.

Section 3.09 No Preemptive Rights; Registration Rights Priority. Except as described in the Partnership Agreement or has been otherwise waived or satisfied, there are no preemptive rights or other rights to subscribe for or to purchase, nor any restriction upon the voting or transfer of, any equity securities of the Partnership. Except for such rights that have been waived or as expressly set forth in the Registration Rights Agreement, neither the offering or sale of the Purchased Units as contemplated by this Agreement gives rise to any rights for or relating to the registration of any Purchased Units or other securities of the Partnership. Except as described in the Partnership Agreement, the Partnership has not granted registration rights to any Person other than the Purchasers that would provide such Person priority over the Purchasers’ rights with respect to any Piggyback Registration.

Section 3.10 Litigation. Except as described in the MPLX SEC Documents, there are no actions, suits, claims, investigations, orders, injunctions or proceedings pending or, to the Knowledge of the MPLX Parties, threatened or contemplated, to which the Partnership Entities or any of their respective directors or officers is or would be a party or to which any of their respective Properties is or would be subject at law or in equity, before or by any Governmental Authority, or before or by any self-regulatory organization or other non-governmental regulatory authority (including, without limitation, the NYSE), which would have, individually or in the aggregate, a Material Adverse Effect, or which challenge the validity of any of the Transaction

Documents or the right of either of the Partnership or the General Partner to enter into any of the Transaction Documents or to consummate the transactions contemplated thereby.

Section 3.11 No Default. No Partnership Entity is in breach or violation of or in default under (nor has any event occurred which, with notice, lapse of time or both, would result in any breach or violation of, constitute a default under or give the holder of any indebtedness (or a person acting on such holder’s behalf) the right to require the repurchase, redemption or repayment of all or a part of such indebtedness under) (a) any of its Organizational Documents, (b) any Contract to which it is a party or by which it or any of its Properties may be bound or affected, (c) any Law, (d) any rule or regulation of any self-regulatory organization or other non-governmental regulatory authority (including, without limitation, the rules and regulations of the NYSE), or (e) any decree, judgment or order applicable to it or any of its Properties, except in the case of clauses (b) through (e) for any such breaches, violations or defaults that are described in the MPLX SEC Documents or that would not, individually or in the aggregate, constitute a Material Adverse Effect or materially impair the ability of any of the Partnership Entities to perform its obligations under the Transaction Documents.

Section 3.12 No Conflicts. The issuance and sale by the Partnership of the Purchased Units, the application of the proceeds thereof, the execution, delivery and performance of the Transaction Documents and the consummation of the transactions contemplated thereby will not conflict with, result in any breach or violation of, constitute a default under (or constitute any event which, with notice, lapse of time or both, would result in any breach or violation of, constitute a default under or give the holder of any indebtedness (or a person acting on such holder’s behalf) the right to require the repurchase, redemption or repayment of all or a part of such indebtedness under), or result in the creation or imposition of a Lien on any Property or assets of any Partnership Entity pursuant to (a) the Organizational Documents of any of the Partnership Entities, (b) any Contract to which any of the Partnership Entities is a party or by which any of the Partnership Entities or any of their respective Properties may be bound or affected, (c) any Law, (d) any rule or regulation of any self-regulatory organization or other non-governmental regulatory authority (including, without limitation, the rules and regulations of the NYSE), or (e) any decree, judgment or order applicable to any of the Partnership Entities or any of their respective properties, except in the cases of clauses (b) through (e) for any such conflicts, breaches, violations or defaults that would not, individually or in the aggregate, constitute a Material Adverse Effect or materially impair the ability of any of the Partnership Entities to perform its obligations under the Transaction Documents.

Section 3.13 Authority: Enforceability. The Partnership has all requisite power and authority under the Partnership Agreement and the Delaware LP Act to issue, sell and deliver the Purchased Units, in accordance with and upon the terms and conditions set forth in this Agreement and the Partnership Agreement. All limited partnership, limited liability company or corporate action, as the case may be, required to be taken by the Partnership Entities or any of their partners, members or stockholders for the authorization, issuance, sale and delivery of the Purchased Units, the execution and delivery of the Transaction Documents and the consummation of the transactions contemplated thereby shall have been validly taken. No approval from the holders of outstanding Common Units is required under the Partnership Agreement or the rules of the NYSE in connection with the Partnership’s issuance and sale of the Purchased Units to the Purchasers. Each of the Transaction Documents has been duly and validly

authorized and has been or, with respect to the Transaction Documents to be delivered at the Closing, will be, validly executed and delivered by the Partnership or the General Partner, as the case may be, and, to the Knowledge of the MPLX Parties, the other parties thereto. Each of the Transaction Documents constitutes, or will constitute, the legal, valid and binding obligations of the Partnership or the General Partner, as the case may be, and, to the Knowledge of the MPLX Parties, each of the parties thereto, in each case enforceable in accordance with its terms; provided that, with respect to each such agreement, the enforceability thereof may be limited by applicable bankruptcy, insolvency, fraudulent transfer, reorganization, moratorium or similar Laws from time to time in effect affecting creditors’ rights and remedies generally and by general principles of equity (regardless of whether such principles are considered in a proceeding in equity or at law).

Section 3.14 Approvals. No approval, authorization, consent, wavier, license, qualification, written exemption from, or order of or filing with any Governmental Authority, or of or with any self-regulatory organization or other non-governmental regulatory authority (including, without limitation, the NYSE), or approval of the security holders of the Partnership Entities (each, a “Consent”), is required in connection with the issuance and sale of the Purchased Units by the Partnership, the execution, delivery and performance of this Agreement and the other Transaction Documents by the Partnership Entities party hereto or thereto and the consummation by the Partnership Entities of the transactions contemplated hereby or thereby, other than Consents (a) required by the Commission in connection with the Partnership’s obligations under the Registration Rights Agreement, (b) as may be required under the state securities or “Blue Sky” Laws, (c) that have been, or prior to the Closing Date will be, obtained and (d) Consents, the absence or omission of which would not, individually or in the aggregate, have a Material Adverse Effect.

Section 3.15 Distribution Restrictions. No Partnership Entity is currently prohibited, or as a result of the transactions contemplated by this Agreement, will be prohibited, directly or indirectly, from making distributions with respect to its equity securities, from repaying to any other Partnership Entity any loans or advances or from transferring any property or assets to the Partnership or any other Partnership Entity, except (a) as described in or contemplated by the Credit Agreements, (b) such prohibitions mandated by the Laws of each such Partnership Entity’s state of formation and the terms of any such Partnership Entity’s Organizational Documents and (c) where such prohibition would not have a Material Adverse Effect.

Section 3.16 MLP Status. For each taxable year ending after May 21, 2002 during which it was treated as a partnership for United States federal income tax purposes, MarkWest Energy Partners, L.P. met the gross income requirements of Section 7704(c)(2) of the Internal Revenue Code of 1986, as amended (the “Code”), and otherwise satisfied the requirements for treatment as a partnership for United States federal income tax purposes. For each taxable year ending after October 31, 2012, the Partnership met the gross income requirements of Section 7704(c)(2) of the Code, and otherwise satisfied the requirements for treatment as a partnership for United States federal income tax purposes. The Partnership expects to meet these requirements for its current taxable year.

Section 3.17 Investment Company Status. None of the Partnership Entities is, and immediately after the sale of the Purchased Units hereunder and the application of the net

proceeds from such sale none of the Partnership Entities will be, an “investment company” or an entity “controlled” by an “investment company,” as such terms are defined in the Investment Company Act of 1940, as amended.

Section 3.18 Certain Fees. Except for fees to be paid by the Partnership to the Purchasers or their designee pursuant to this Agreement, no fees or commissions are or will be payable by the Partnership to brokers, finders or investment bankers with respect to the sale of any of the Purchased Units or the consummation of the transactions contemplated by this Agreement. The Partnership agrees that it will indemnify and hold harmless the Purchasers from and against any and all claims, demands, or liabilities for broker’s, finder’s, placement, or other similar fees or commissions incurred by the Partnership or alleged to have been incurred by the Partnership in connection with the sale of the Purchased Units or the consummation of the transactions contemplated by this Agreement.

Section 3.19 Labor and Employment Matters. No labor dispute with the employees of any of the Partnership Entities exists, or, to the Knowledge of the Partnership, is imminent, that would have a Material Adverse Effect. To the Knowledge of the MPLX Parties and except as would not, individually or in the aggregate, have a Material Adverse Effect, each Partnership Entity is, and for the past three years has been, in compliance in all material respects with all applicable Laws pertaining to labor, employment, and employment practices. Except as would not, individually or in the aggregate, have a Material Adverse Effect, no Partnership Entity has implemented any location closing or employee layoff in violation of the Worker Adjustment and Retraining Notification Act or any similar state or local law in the past six years, and no such actions are currently contemplated, planned or announced.

Section 3.20 Insurance. The Partnership Entities maintain insurance and self-insured retentions covering the Properties, operations, personnel and businesses of the Partnership Entities as such Partnership Entities reasonably deem adequate; such insurance insures against losses and risks to an extent which is reasonably adequate, in accordance with customary industry practice, to protect the Partnership Entities and their respective businesses in a commercially reasonable manner. All such insurance is fully in force on the date hereof, except for such insurance for which the failure to be outstanding and duly in force would not have a Material Adverse Effect.

Section 3.21 Internal Controls. Except as described in the MPLX SEC Documents, the Partnership Entities, taken as a whole, maintain a system of internal accounting controls sufficient to provide reasonable assurance that (a) transactions are executed in accordance with management’s general or specific authorizations, (b) transactions are recorded as necessary to permit preparation of financial statements in conformity with GAAP and to maintain accountability for assets, (c) access to assets is permitted only in accordance with management’s general or specific authorization and (d) the recorded accountability for assets is compared with existing assets at reasonable intervals and appropriate action is taken with respect to any differences.

Section 3.22 Disclosure Controls. The Partnership has established and will maintain and evaluate “disclosure controls and procedures” (as such term is defined in Rule 13a-15 and 15d-15 under the Exchange Act) and “internal control over financial reporting” (as such term is

defined in Rule 13a-15 and 15d-15 under the Exchange Act); such disclosure controls and procedures are designed to ensure that material information relating to the Partnership is made known to the General Partner’s Chief Executive Officer and its Chief Financial Officer, and such disclosure controls and procedures are effective to perform the functions for which they were established. The Partnership has carried out evaluations of and appropriate officers of the General Partner have certified in the appropriate MPLX SEC Documents management’s conclusions regarding the effectiveness of its disclosure controls and procedures of the Partnership as of December 31, 2015. Since the date of the Partnership’s Annual Report on Form 10-K for the fiscal year ended December 31, 2015, there have been no significant changes in the Partnership’s internal control over financial reporting or in other factors that could significantly affect internal controls, including any corrective actions with regard to significant deficiencies and material weaknesses.

Section 3.23 Sarbanes-Oxley. The Partnership and, to the Partnership’s Knowledge, the General Partner’s directors or officers, in their capacities as such, are in compliance in all material respects with all applicable provisions of the Sarbanes-Oxley Act of 2002 and the rules and regulations promulgated in connection therewith.

Section 3.24 Listing and Maintenance Requirements. The Common Units are listed on the NYSE, and the Partnership has not received any notice of delisting. The issuance and sale of the Purchased Units and issuance of Common Units upon conversion of the Purchased Units do not contravene NYSE rules and regulations.

Section 3.25 Environmental Compliance. Except as described in MPLX SEC Documents, (a) each Partnership Entity and each of the Properties, assets and operations of the Partnership Entities is in compliance with any and all Environmental Laws, (b) each Partnership Entity has timely applied for or received and, to the extent received, is in compliance with all permits, licenses, authorizations or other approvals required under Environmental Laws to conduct its business as it is currently being conducted, (c) since January 1, 2015, no Partnership Entity has received written notice of any, and to the Knowledge of the MPLX Parties, there currently exist no events, conditions, occurrences or activities that would reasonably be expected to form the basis for any actual or potential liability under Environmental Laws for the investigation or remediation of any disposal or release of any Hazardous Materials or for violations under Environmental Laws, and (d) no Partnership Entity is subject to any pending or, to the Knowledge of the MPLX Parties, threatened actions, suits, demands, orders or proceedings against any Partnership Entity relating to any Environmental Laws (collectively, “Environmental Proceedings”), except for any such (i) failures to comply with Environmental Laws or to timely apply for or receive, or to comply with, permits, licenses, authorizations or other approvals required under Environmental Laws, (ii) actual or potential liabilities or violations under Environmental Laws or (iii) Environmental Proceedings, in each case that would not, individually or in the aggregate, constitute a Material Adverse Effect. Except as described in the MPLX SEC Documents, no Partnership Entity has entered into any settlement agreement relating to any alleged violation of any Environmental Law or any actual or alleged release or threatened release or cleanup at any location of any Hazardous Materials, except for any such agreements that would not, individually or in the aggregate, constitute a Material Adverse Effect. Except as described in the MPLX SEC Documents, no Partnership Entity is currently named as a “potentially responsible party” under the Comprehensive Environmental

Response, Compensation, and Liability Act of 1980, as amended. Notwithstanding anything to the contrary in this Article III, this Section 3.25 contains the only representations and warranties of the Partnership with respect to compliance with, or liability under, Environmental Laws, the application for and maintenance of, and compliance with, all Permits required under Environmental Laws and Environmental Proceedings.

Section 3.26 ERISA Compliance. None of the following events has occurred or exists with respect to any of the Partnership Entities: (a) a failure to fulfil the obligations, if any, under the minimum funding standards of Section 302 of ERISA, and the regulations and published interpretations thereunder with respect to any Plan (as defined below), determined without regard to any waiver of such obligations or extension of any amortization period, and which would result in a Material Adverse Effect, (b) an audit or investigation by the Internal Revenue Service, the U.S. Department of Labor, the Pension Benefit Guaranty Corporation or any other federal or state governmental agency or any foreign regulatory agency with respect to the employment or compensation of employees of or seconded to the Partnership Entities that would constitute a Material Adverse Effect or (c) any breach of any contractual obligation, or any violation of law or applicable qualification standards, with respect to the employment or compensation of employees of or seconded to the Partnership Entities by any such Partnership Entity that would constitute a Material Adverse Effect. None of the following events has occurred or is reasonably likely to occur with respect to any of the Partnership Entities that would cause a Material Adverse Effect: (w) an increase in the aggregate amount of contributions required to be made to all Plans in the current fiscal year compared to the amount of such contributions made by the Partnership Entities in the most recently completed fiscal year, (x) an increase in the Partnership Entities’ “accumulated post-retirement benefit obligations” (within the meaning of Statement of Financial Accounting Standards 106) compared to the amount of such obligations in the most recently completed fiscal year, (y) any event or condition giving rise to a liability under Title IV of ERISA or (z) the filing of a claim by one or more employees of, former employees of, or employees seconded to the Partnership Entities related to its or their employment . For purposes of this Section 3.26, the term “Plan” means a plan (within the meaning of Section 3(3) of ERISA) subject to Title IV of ERISA with respect to which any Partnership Entity may have any liability.

Section 3.27 Tax Returns; Taxes. Except as would not, individually or in the aggregate, have a Material Adverse Effect, (i) each of the Partnership Entities has prepared and timely filed (taking into account any extension of time within which to file) all Tax Returns required to be filed by any of them and all such filed Tax Returns are complete and accurate, (ii) each of the Partnership Entities has timely paid all Taxes that are required to be paid by any of them, (iii) there are no audits, examinations, investigations, actions, suits, claims or other proceedings in respect of Taxes pending or threatened in writing nor has any deficiency for any Tax been assessed by any Governmental Authority in writing against any Partnership Entity, and (iv) all Taxes required to be withheld by any Partnership Entity have been withheld and paid over to the appropriate Tax authority (except, in the case of this clause (iv) or clause (i) or (ii) above, with respect to matters contested in good faith and for which adequate reserves have been established on the Partnership’s financial statements included or incorporated by reference in the MPLX SEC Documents). None of the Partnership Entities has entered into any transaction that, as of the date of this Agreement, has been identified by the Internal Revenue Service in published

guidance as a “listed transaction” as defined under Section 1.6011-4(b)(2) of the Treasury Regulations promulgated under the Code.

Section 3.28 Permits. Except as described in MPLX SEC Documents, and excluding Permits addressed under Section 3.25, (a) each of the Partnership Entities has all necessary licenses, authorizations, permits, variances, waivers, exemptions, consents and approvals (each, a “Permit”) and has made all necessary filings required under any applicable Law, and has obtained all necessary Permits from other persons, in order to conduct its business and own its Properties as such business is currently conducted and such Properties are currently owned, except for such Permits the absence or omission of which would not, individually or in the aggregate, constitute a Material Adverse Effect; (b) no Partnership Entity is in violation of or default under, or has received notice of any proceedings relating to the revocation or modification of, any such Permit or any Law applicable to such Partnership Entity, except for any such violations, defaults, revocations or modifications that would not, individually or in the aggregate, constitute a Material Adverse Effect; and (c) each of the Partnership Entities is in compliance with all such Permits, except for any failure to comply with such Permits that would not, individually or in the aggregate, constitute a Material Adverse Effect.

Section 3.29 Required Disclosures and Descriptions. There are no legal or governmental proceedings (including an audit or examination by any taxing authority) pending or, to the Knowledge of the MPLX Parties, threatened, against any of the Partnership Entities, or to which any of the Partnership Entities is a party, or to which any of their respective Properties is subject, that are required to be described in the MPLX SEC Documents but are not described as required, and there are no Contracts that are required to be described in the MPLX SEC Documents or to be filed as an exhibit to the MPLX SEC Documents that are not described or filed as required by the Securities Act or the Exchange Act.

Section 3.30 Title to Property. The Partnership Entities have good and marketable title to all real property (except for Rights-of-Way) and good title to all personal property described in the MPLX SEC Documents as being owned by any of them, free and clear of all Liens, except for (a) Liens that do not materially affect the value of such property and do not materially interfere with the use made or proposed to be made of such property by the Partnership Entities and (b) Liens as are described in the MPLX SEC Documents.

Section 3.31 Rights-of-Way. Each Partnership Entity, directly or indirectly, has such consents, easements, rights-of-way or licenses from any Person (“Rights-of-Way”) as are necessary to enable it to conduct its business in the manner described in the MPLX SEC Documents, subject to such qualifications as may be set forth in the MPLX SEC Documents, except for (a) qualifications, reservations and encumbrances that would not, individually or in the aggregate, constitute a Material Adverse Effect and (b) such Rights-of-Way the absence or omission of which would not, individually or in the aggregate, constitute a Material Adverse Effect; and, except as described in the MPLX SEC Documents or as would not interfere with the consummation of the transactions contemplated hereby, none of such Rights-of-Way contains any restriction that is materially burdensome to the Partnership Entities, taken as a whole.

Section 3.32 Form S-3 Eligibility. The Partnership is eligible to register the Preferred Shares and the Conversion Shares for resale by the Purchasers under Form S-3 promulgated under the Securities Act.

Section 3.33 FCPA. No Partnership Entity nor, to the Knowledge of the MPLX Parties, any director, officer, agent or employee of the Partnership Entities has made any payment of funds of such Partnership Entities or received or retained any funds in violation of any Law (including, without limitation, the Foreign Corrupt Practices Act of 1977), which payment, receipt or retention is of a character required to be disclosed in the MPLX SEC Documents.

Section 3.34 Money Laundering Laws. The operations of the Partnership Entities are and have been conducted at all times in compliance with applicable financial recordkeeping and reporting requirements of the Currency and Foreign Transactions Reporting Act of 1970, as amended, the money laundering statutes of all jurisdictions, the rules and regulations thereunder and any related or similar rules, regulations or guidelines issued, administered or enforced by any Governmental Authority (collectively, “Money Laundering Laws”); and no action, suit or proceeding by or before any court or Governmental Authority or any arbitrator or non-governmental authority involving the Partnership Entities with respect to Money Laundering Laws is pending or, to the Knowledge of the MPLX Parties, threatened.

Section 3.35 OFAC. No Partnership Entity nor, to the Knowledge of the MPLX Parties, any director, officer, agent or employee of the Partnership Entities is currently subject to any U.S. sanctions administered by the Office of Foreign Assets Control of the U.S. Treasury Department (“OFAC”); and the Partnership Entities will not directly or indirectly use the proceeds of the transactions contemplated hereby, or lend, contribute or otherwise make available such proceeds to any other person or entity, for the purpose of the Partnership Entities of financing the activities of any person currently subject to any U.S. sanctions administered by OFAC.

Section 3.36 Related Party Transactions. Except as described in MPLX SEC Documents, no Partnership Entity has, directly or indirectly (a) extended credit, arranged to extend credit, or renewed any extension of credit, in the form of a personal loan, to or for any director or executive officer of the General Partner or its Affiliates, or to or for any family member or Affiliate of any director or executive officer of the General Partner or its Affiliates or (b) made any material modification to the term of any personal loan to any director or executive officer of the General Partner or its Affiliates, or any family member or Affiliate of any director or executive officer of the General Partner or its Affiliates.

Section 3.37 No Side Agreements. Except as previously disclosed in writing to each Purchaser and except for that certain letter agreement, dated as of the date hereof, between the Partnership, on the one hand, and an Affiliate of Stonepeak, on the other hand, relating to the Partnership’s consent to the identity of certain potential transferees pursuant to Sections 5.04 and 8.10 of this Agreement, the existence of which each of the Purchasers hereby acknowledges, there are no binding agreements by, among or between the Partnership or any of its Affiliates, on the one hand, and any Purchaser or any of their Affiliates, on the other hand, with respect to the transactions contemplated hereby other than the Transaction Documents.

ARTICLE IV.

REPRESENTATIONS AND WARRANTIES AND
COVENANTS OF THE PURCHASERS

Each of the Purchasers, severally but not jointly, represents and warrants and covenants to the Partnership as follows:

Section 4.01 Existence. Such Purchaser is duly organized and validly existing and in good standing under the Laws of its state of formation, with all necessary power and authority to own properties and to conduct its business as currently conducted.

Section 4.02 Authorization, Enforceability. Such Purchaser has all necessary legal power and authority to enter into, deliver and perform its obligations under the Transaction Documents to which it is a party. The execution, delivery and performance of such Transaction Documents by such Purchaser and the consummation by it of the transactions contemplated thereby have been duly and validly authorized by all necessary legal action, and no further consent or authorization of such Purchaser is required. Each of the Transaction Documents to which such Purchaser is a party has been duly executed and delivered by such Purchaser, where applicable, and constitutes legal, valid and binding obligations of such Purchaser; provided that, with respect to each such agreement, the enforceability thereof may be limited by applicable bankruptcy, insolvency, fraudulent transfer, reorganization, moratorium or similar Laws from time to time in effect affecting creditors’ rights and remedies generally and by general principles of equity (regardless of whether such principles are considered in a proceeding in equity or at law).

Section 4.03 No Breach. The execution, delivery and performance of the Transaction Documents to which such Purchaser is a party by such Purchaser and the consummation by such Purchaser of the transactions contemplated thereby will not (a) conflict with or result in a breach or violation of any of the terms or provisions of, or constitute a default under, any material agreement to which such Purchaser is a party or by which such Purchaser is bound or to which any of the property or assets of such Purchaser is subject, (b) conflict with or result in any violation of the provisions of the Organizational Documents of such Purchaser, or (c) violate any Law of any Governmental Authority or body having jurisdiction over such Purchaser or the property or assets of such Purchaser, except in the case of clauses (a) and (c), for such conflicts, breaches, violations or defaults as would not prevent the consummation of the transactions contemplated by such Transaction Documents.

Section 4.04 Certain Fees. No fees or commissions are or will be payable by such Purchaser to brokers, finders or investment bankers with respect to the purchase of any of the Purchased Units or the consummation of the transactions contemplated by this Agreement, except for fees or commissions for which the Partnership is not responsible. Each Purchaser agrees that it will indemnify and hold harmless the Partnership from and against any and all claims, demands, or liabilities for broker’s, finder’s, placement, or other similar fees or commissions incurred by such Purchaser or alleged to have been incurred by such Purchaser in connection with the purchase of the Purchased Units or the consummation of the transactions contemplated by this Agreement.

Section 4.05 Unregistered Securities.

(a) Accredited Investor Status; Sophisticated Purchaser. Such Purchaser is an “accredited investor” within the meaning of Rule 501 under the Securities Act and is able to bear the risk of its investment in the Purchased Units and the Conversion Units. Such Purchaser has such knowledge and experience in financial and business matters that it is capable of evaluating the merits and risks of the purchase of the Purchased Units and the Conversion Units.

(b) Information. Such Purchaser and its Representatives have been furnished with all materials relating to the business, finances and operations of the Partnership that have been requested and materials relating to the offer and sale of the Purchased Units and Conversion Units that have been requested by such Purchaser. Such Purchaser and its Representatives have been afforded the opportunity to ask questions of the Partnership. Neither such inquiries nor any other due diligence investigations conducted at any time by such Purchasers and its Representatives shall modify, amend or affect such Purchasers’ right (i) to rely on the Partnership’s representations and warranties contained in Article III above or (ii) to indemnification or any other remedy based on, or with respect to the accuracy or inaccuracy of, or compliance with, the representations, warranties, covenants and agreements in any Transaction Document. Such Purchaser understands that its purchase of the Purchased Units involves a high degree of risk. Such Purchaser has sought such accounting, legal and tax advice as it has considered necessary to make an informed investment decision with respect to its acquisition of the Purchased Units.

(c) Residency. Such Purchaser shall cooperate reasonably with the Partnership to provide any information necessary for any applicable securities filings.

(d) Legends. Such Purchaser understands that, until such time as the Purchased Units have been sold pursuant to an effective registration statement under the Securities Act, or the Purchased Units are eligible for resale pursuant to Rule 144 promulgated under the Securities Act without any restriction as to the number of securities as of a particular date that can then be immediately sold, the Purchased Units will bear a restrictive legend as provided in the Partnership Agreement. Each Purchaser understands that, until such time as the Conversion Units have been sold pursuant to an effective registration statement under the Securities Act, or the Conversion Units are eligible for resale pursuant to Rule 144 promulgated under the Securities Act without any restriction as to the number of securities as of a particular date that can then be immediately sold, the Conversion Units will bear a restrictive legend as provided in the Partnership Agreement.

(e) Purchase Representation. Such Purchaser is purchasing the Purchased Units for its own account and not with a view to distribution in violation of any securities Laws. Such Purchaser has been advised and understands that neither the Purchased Units nor the Conversion Units have been registered under the Securities Act or under the “blue sky” Laws of any jurisdiction and may be resold only if registered pursuant to the provisions of the Securities Act (or if eligible, pursuant to the provisions of Rule 144 promulgated under the Securities Act or pursuant to another available exemption from the registration requirements of the Securities Act). Such Purchaser has been advised and understands that the Partnership, in issuing the Purchased Units, is relying upon, among other things, the representations and warranties of such Purchaser contained in this Article IV in concluding that such issuance is a “private offering” and is exempt from the registration provisions of the Securities Act.

(f) Rule 144. Such Purchaser understands that there is no public trading market for the Purchased Units, that none is expected to develop and that the Purchased Units must be held indefinitely unless and until the Purchased Units or the Conversion Units (or both) are registered under the Securities Act or an exemption from registration is available. Each Purchaser has been advised of and is aware of the provisions of Rule 144 promulgated under the Securities Act.

(g) Reliance by the Partnership. Such Purchaser understands that the Purchased Units are being offered and sold in reliance on a transactional exemption from the registration requirements of federal and state securities Laws and that the Partnership is relying upon the truth and accuracy of the representations, warranties, agreements, acknowledgments and understandings of such Purchaser set forth herein in order to determine the applicability of such exemptions and the suitability of such Purchaser to acquire the Purchased Units and the Conversion Units issuable upon conversion thereof.

Section 4.06 Sufficient Funds. Such Purchaser will have available to it at the Closing sufficient funds to enable such Purchaser to pay in full at the Closing the entire amount of such Purchaser’s Funding Obligation in immediately available cash funds.

Section 4.07 No Prohibited Trading. During the fifteen (15) day period prior to the date hereof, no Purchaser has (a) offered, sold, contracted to sell, sold any option or contract to purchase, purchased any option or contract to sell, granted any option, right or warrant to purchase, lent, or otherwise transferred or disposed of, directly or indirectly, any of the Purchased Units or (b) directly or indirectly engaged in any short sales or other derivative or hedging transactions with respect to the Purchased Units, including by means of any swap or other transaction or arrangement that transfers or that is designed to, or that might reasonably be expected to, result in the transfer to another, in whole or in part, of any of the economic consequences of ownership of any Purchased Units, regardless of whether any transaction described in this Section 4.07 is to be settled by delivery of Series A Preferred Units, Common Units or other securities, in cash or otherwise.

ARTICLE V.

COVENANTS

Section 5.01 Conduct of Business. During the period commencing on the date of this Agreement and ending on the Closing Date, each of the Partnership Entities will use commercially reasonable efforts to conduct its business in the ordinary course of business, preserve intact its existence and business organization, Permits, goodwill and present business relationships with all material customers, suppliers, licensors, distributors and others having significant business relationships with the Partnership Entities (or any of them), to the extent the Partnership believes in its sole discretion that such relationships are and continue to be beneficial to the Partnership Entities and their businesses.

Section 5.02 Listing of Units. Prior to the Closing, the Partnership will use its commercially reasonable efforts to obtain approval for listing of the Conversion Units, subject to notice of issuance, on the NYSE.

Section 5.03 Cooperation; Further Assurances. Each of the Partnership and the Purchasers shall use its respective commercially reasonable efforts to obtain all approvals and consents required by or necessary to consummate the transactions contemplated by this Agreement and the other Transaction Documents. Each of the Partnership and the Purchasers agrees to execute and deliver all such documents or instruments, to take all commercially reasonable action and to do all other commercially reasonable things it determines to be necessary, proper or advisable under applicable Laws and regulations or as otherwise reasonably requested by the other to consummate the transactions contemplated by this Agreement.

Section 5.04 Lock-up Agreement. Without the prior written consent of the Partnership, except as specifically provided in this Agreement or as otherwise provided in the Partnership Agreement, each Purchaser and its Affiliates shall not, (a) during the period commencing on the Closing Date and ending on the first anniversary of the Closing Date, offer, sell, contract to sell, sell any option or contract to purchase, purchase any option or contract to sell, grant any option, right or warrant to purchase, lend, or otherwise transfer or dispose of, directly or indirectly, any of the Purchased Units, (b) during the period commencing on the date hereof and ending on the second anniversary of the Closing Date, directly or indirectly engage in any short sales or other derivative or hedging transactions with respect to the Purchased Units, (c) transfer any Purchased Units to any non-U.S. resident individual, non-U.S. corporation or partnership, or any other non-U.S. entity, including any foreign governmental entity, including by means of any swap or other transaction or arrangement that transfers or that is designed to, or that might reasonably be expected to, result in the transfer to another, in whole or in part, of any of the economic consequences of ownership of any Purchased Units, regardless of whether any transaction described in clauses (a) through (c) above is to be settled by delivery of Series A Preferred Units, Common Units or other securities, in cash or otherwise (provided, however, that the foregoing shall not apply if, prior to any such transfer or arrangement, such individual, corporation, partnership or other entity establishes to the satisfaction of the Partnership, its entitlement to a complete exemption from tax withholding, including under Code Sections 1441, 1442, 1445 and 1471 through 1474, and the Treasury regulations thereunder), or (d) effect any transfer of Purchased Units or Conversion Units in a manner that violates the terms of the Partnership Agreement; provided, however, that such Purchaser may pledge all or any portion of its Purchased Units to any holders of obligations owed by the Purchaser, including to the trustee for, or Representative of, such holders; provided, further, that such Purchaser may transfer any Purchased Units to (i) an Affiliate of such Purchaser or (ii) any other Purchaser. Notwithstanding the foregoing, any transferee receiving any Purchased Units pursuant to this Section 5.04 shall agree to the restrictions set forth in this Section 5.04. For the avoidance of doubt, in no way does this Section 5.04 prohibit changes in the composition of any Purchaser or its partners or members so long as such changes in composition only relate to changes in direct or indirect ownership of the Purchaser among such Purchaser, its Affiliates and the limited partners of the private equity fund vehicles that indirectly own such Purchaser. After the first anniversary of the Closing Date, the Purchasers and their respective Affiliates or other Holders of Purchased Units may only transfer Purchased Units in an aggregate amount not less than $50 million based on the Unit Purchase Price, (or such lesser amount if it (x) constitutes the remaining holdings of the Purchaser or Holder or (y) has been approved by the General Partner, in its sole discretion), subject to compliance with applicable securities laws and the Partnership Agreement; provided that the provisions of this sentence shall not eliminate, modify or reduce the obligations set forth in clauses (b), (c) or (d)

above. Notwithstanding anything to the contrary in subclause (a) of this Section 5.04, but subject to subclauses (b) and (c) of this Section 5.04, during the period beginning on the date hereof and ending on the date that is 60 days after the Closing Date (the “Non-Affiliate Transfer Period”), Stonepeak and its Affiliates may transfer or dispose of Purchased Units to one or more non-Affiliates of Stonepeak, subject to the consent of the Partnership as to the identity of the transferee (which consent shall not be unreasonably withheld, conditioned or delayed); provided, however, that (A) any transfer made pursuant to this sentence must consist of Purchased Units in an amount not less than $25 million based on the Unit Purchase Price, (B) the aggregate amount of Purchased Units and rights to purchase Purchased Units transferred pursuant to this sentence and Section 8.10 shall not be greater than $100 million based on the Unit Purchase Price and (C) a maximum of two transfers may be made pursuant to this sentence and Section 8.10.

Section 5.05 Tax Estimates. On or before April 1 of each year beginning in 2019, the Partnership shall provide each Purchaser that continues to own Purchased Units a good faith estimate (and reasonable supporting calculations) of whether there was sufficient Unrealized Gain attributable to the Partnership property as of December 31 of the previous year such that, if any of such Purchaser’s Series A Preferred Units were converted to Common Units and such Unrealized Gain was allocated to such Purchaser pursuant to Section 5.5(d)(iii) of the Second A&R LPA (taking proper account of allocations of higher priority), such Purchaser’s Capital Account in respect of its Common Units would be equal to the Per Unit Capital Amount for an Initial Common Unit without any need for corrective allocations under Section 6.2(h) of the Second A&R LPA.

In addition, following receipt of a written request from any Purchaser that, together with its Affiliates, acquired $100 million or more Purchased Units on the Closing Date, so long as such Purchaser or any of its respective Affiliates continues to own Purchased Units, the Partnership shall provide such Purchaser with a good faith estimate (and reasonable supporting calculations) of whether there is sufficient Unrealized Gain attributable to the Partnership property on the date of such request such that, if any of such Purchaser’s Series A Preferred Units were converted to Common Units and such Unrealized Gain was allocated to such Purchaser pursuant to Section 5.5(d)(iii) of the Second A&R LPA (taking proper account of allocations of higher priority), such Purchaser’s Capital Account in respect of its Common Units would be equal to the Per Unit Capital Amount for an Initial Common Unit without any need for corrective allocations under Section 6.2(h) of the Second A&R LPA. Each such Purchaser, together with its Affiliates, shall be entitled to make such a request not more than once per calendar year.

For purposes of this Section 5.05, all capitalized terms used but not defined herein shall have the meanings assigned to them in the Second A&R LPA.

ARTICLE VI.

INDEMNIFICATION, COSTS AND EXPENSES

Section 6.01 Indemnification by the Partnership. The Partnership agrees to indemnify each Purchaser and its Representatives (collectively, “Purchaser Related Parties”) from costs, losses, liabilities, damages or expenses of any kind or nature whatsoever, and hold each of them harmless against, any and all actions, suits, proceedings (including any investigations, litigation

or inquiries), demands and causes of action, and, in connection therewith, promptly upon demand, pay or reimburse each of them for all costs, losses, liabilities, damages or expenses of any kind or nature whatsoever (including the reasonable fees and disbursements of counsel and all other reasonable expenses incurred in connection with investigating, defending or preparing to defend any such matter that may be incurred by them or asserted against or involve any of them), whether or not involving a Third-Party Claim, as a result of, arising out of, or in any way related to (a) the failure of any of the representations or warranties made by the Partnership contained herein to be true and correct in all material respects as of the date made (except to the extent any representation or warranty includes the word “material,” Material Adverse Effect or words of similar import, with respect to which such representation or warranty, or applicable portions thereof, must have been true and correct) or (b) the breach of any covenants of the Partnership contained herein; provided that, in the case of the immediately preceding clause (a), such claim for indemnification is made prior to the expiration of the survival period of such representation or warranty; and provided, further, that for purposes of determining when an indemnification claim has been made, the date upon which a Purchaser Related Party shall have given notice (stating in reasonable detail the basis of the claim for indemnification) to the Partnership shall constitute the date upon which such claim has been made; and provided, further, that the aggregate liability of the Partnership to each Purchaser pursuant to this Section 6.01 shall not be greater in amount than such Purchaser’s Funding Obligation, and the aggregate liability of the Partnership to all Purchasers pursuant to this Section 6.01 shall not exceed the Purchase Price. No Purchaser Related Party shall be entitled to recover special, indirect, exemplary, lost profits, speculative or punitive damages under this Section 6.01; provided, however, that such limitation shall not prevent any Purchaser Related Party from recovering under this Section 6.01 for any such damages to the extent that such damages are in the form of diminution in value or are payable to a third party in connection with any Third-Party Claims.

Section 6.02 Indemnification by the Purchasers. Each Purchaser agrees, severally and not jointly, to indemnify the Partnership, the General Partner and their respective Representatives (collectively, “Partnership Related Parties”) from, costs, losses, liabilities, damages or expenses of any kind or nature whatsoever, and hold each of them harmless against, any and all actions, suits, proceedings (including any investigations, litigation or inquiries), demands and causes of action, and, in connection therewith, promptly upon demand, pay or reimburse each of them for all costs, losses, liabilities, damages or expenses of any kind or nature whatsoever (including the reasonable fees and disbursements of counsel and all other reasonable expenses incurred in connection with investigating, defending or preparing to defend any such matter that may be incurred by them or asserted against or involve any of them), whether or not involving a Third-Party Claim, as a result of, arising out of, or in any way related to (a) the failure of any of the representations or warranties made by such Purchaser contained herein to be true and correct in all material respects as of the date made (except to the extent any representation or warranty includes the word “material,” Material Adverse Effect or words of similar import, with respect to which such representation or warranty, or applicable portions thereof, must have been true and correct) or (b) the breach of any of the covenants of such Purchaser contained herein; provided that, in the case of the immediately preceding clause (a), such claim for indemnification relating to a breach of any representation or warranty is made prior to the expiration of the survival period of such representation or warranty; and provided, further, that for purposes of determining when an indemnification claim has been

made, the date upon which a Partnership Related Party shall have given notice (stating in reasonable detail the basis of the claim for indemnification) to such Purchaser shall constitute the date upon which such claim has been made; and provided, further, that the aggregate liability of any Purchaser pursuant to this Section 6.02 shall not be greater in amount than the sum of such Purchaser’s Funding Obligation plus any distributions paid to such Purchaser with respect to the Purchased Units. No Partnership Related Party shall be entitled to recover special, indirect, exemplary, incidental, lost profits, speculative or punitive damages under this Section 6.02; provided, however, that such limitation shall not prevent any Partnership Related Party from recovering under this Section 6.02 for any such damages to the extent that such damages are in the form of diminution in value or are payable to a third party in connection with any Third-Party Claims.

Section 6.03 Indemnification Procedure.

(a) A claim for indemnification for any matter not involving a Third-Party Claim may be asserted by notice to the party from whom indemnification is sought; provided, however, that failure to so notify the indemnifying party shall not preclude the indemnified party from any indemnification which it may claim in accordance with this Article VI, except as otherwise provided in Section 6.01 and Section 6.02.

(b) Promptly after any Partnership Related Party or Purchaser Related Party (hereinafter, the “Indemnified Party”) has received notice of any indemnifiable claim hereunder, or the commencement of any action, suit or proceeding by a third person, which the Indemnified Party believes in good faith is an indemnifiable claim under this Agreement (each a “Third-Party Claim”), the Indemnified Party shall give the indemnitor hereunder (the “Indemnifying Party”) written notice of such Third-Party Claim or the commencement of such action, suit or proceeding, but failure to so notify the Indemnifying Party will not relieve the Indemnifying Party from any liability it may have to such Indemnified Party hereunder except to the extent that the Indemnifying Party is materially prejudiced by such failure. Such notice shall state the nature and the basis of such Third-Party Claim to the extent then known. The Indemnifying Party shall have the right to defend and settle, at its own expense and by its own counsel who shall be reasonably acceptable to the Indemnified Party, any such matter as long as the Indemnifying Party pursues the same diligently and in good faith. If the Indemnifying Party undertakes to defend or settle, it shall promptly, and in no event later than ten (10) days, notify the Indemnified Party of its intention to do so, and the Indemnified Party shall cooperate with the Indemnifying Party and its counsel in all commercially reasonable respects in the defense thereof and the settlement thereof. Such cooperation shall include, but shall not be limited to, furnishing the Indemnifying Party with any books, records and other information reasonably requested by the Indemnifying Party and in the Indemnified Party’s possession or control. Such cooperation of the Indemnified Party shall be at the cost of the Indemnifying Party. After the Indemnifying Party has notified the Indemnified Party of its intention to undertake to defend or settle any such asserted liability, and for so long as the Indemnifying Party diligently pursues such defense, the Indemnifying Party shall not be liable for any additional legal expenses incurred by the Indemnified Party in connection with any defense or settlement of such asserted liability; provided, however, that the Indemnified Party shall be entitled (i) at its expense, to participate in the defense of such asserted liability and the negotiations of the settlement thereof and (ii) if (A) the Indemnifying Party has, within ten (10) Business Days of when the Indemnified Party provides written notice of a Third-Party Claim, failed (1) to assume the defense or employ

counsel reasonably acceptable to the Indemnified Party or (2) to notify the Indemnified Party of such assumption or (B) if the defendants in any such action include both the Indemnified Party and the Indemnifying Party and counsel to the Indemnified Party shall have concluded that there may be reasonable defenses available to the Indemnified Party that are different from or in addition to those available to the Indemnifying Party or if the interests of the Indemnified Party reasonably may be deemed to conflict with the interests of the Indemnifying Party, then the Indemnified Party shall have the right to select one separate counsel and to assume such legal defense and otherwise to participate in the defense of such action, with the expenses and fees of such separate counsel and other expenses related to such participation to be reimbursed by the Indemnifying Party as incurred. Notwithstanding any other provision of this Agreement, the Indemnifying Party shall not settle any indemnified claim without the consent of the Indemnified Party, unless the settlement thereof imposes no liability or obligation on, and includes a complete release from liability of, and does not include any admission of wrongdoing or malfeasance by, the Indemnified Party.

Section 6.04 Tax Matters. All indemnification payments under this Article VI shall be adjustments to the Purchaser’s Funding Obligation except as otherwise required by applicable Law.

ARTICLE VII.

TERMINATION

Section 7.01 Termination. This Agreement may be terminated at any time prior to the Closing:

(a) with respect to any particular Purchaser, by mutual written consent of the Partnership and such Purchaser;

(b) with respect to any particular Purchaser, by written notice from either the Partnership or such Purchaser if any Governmental Authority with lawful jurisdiction shall have issued a final order, decree or ruling or taken any other final action restraining, enjoining or otherwise prohibiting the transactions contemplated by the Transaction Documents and such order, decree, ruling or other action is or shall have become final and nonappealable; or

(c) by written notice from the Partnership or a Purchaser, with respect to itself but not any other Purchaser, if the Closing does not occur by 11:59 p.m. on May 31, 2016 Houston, Texas time; provided, however, that no party may terminate this Agreement pursuant to this Section 7.01(c) if such party is, at the time of providing such written notice, in breach of any of its obligations under this Agreement.

Section 7.02 Certain Effects of Termination. In the event that this Agreement is terminated pursuant to Section 7.01:

(a) except as set forth in Section 7.02(b), this Agreement shall become null and void and have no further force or effect, but the parties shall not be released from any liability arising from or in connection with any breach hereof occurring prior to such termination;

(b) regardless of any purported termination of this Agreement, the provisions of Article VI and all indemnification rights and obligations of the Partnership and the Purchasers

thereunder, this Section 7.02 and the provisions of Article VIII shall remain operative and in full force and effect as between the Partnership and the Purchasers; and

(c) subject to Section 8.06(a), the Confidentiality Agreements shall remain in effect until each such Confidentiality Agreement expires in accordance with its terms.

ARTICLE VIII.

MISCELLANEOUS

Section 8.01 Expenses. Except as follows, all costs and expenses, including fees and disbursements of counsel, financial advisors and accountants, incurred in connection with the Transaction Documents and the transactions contemplated thereby shall be paid by the party incurring such costs and expenses:

(a) Promptly following receipt of an invoice therefore containing reasonable supporting detail, the Partnership shall reimburse Stonepeak for the reasonable fees and expenses of Sidley Austin LLP, counsel to Stonepeak, of up to $150,000 (with legal fees and expenses of Sidley Austin LLP in excess of $150,000 to be paid pro rata by all the Purchasers in proportion to the aggregate number of Purchased Units purchased by each); and

(b) Each Purchaser shall be entitled to, and shall, net against its respective Funding Obligation at the Closing an amount equal to its pro rata share of 1.5% of the Total Funding Obligation with respect to the Closing (the “Transaction Fee”). For United States federal income tax purposes, the Transaction Fee and the reimbursements described in Section 8.01(a) are, and will be treated by the parties as, adjustments to the Purchase Price paid by the Purchasers for the Purchased Units.

Section 8.02 Interpretation. Article, Section, Schedule and Exhibit references in this Agreement are references to the corresponding Article, Section, Schedule or Exhibit to this Agreement, unless otherwise specified. All Exhibits and Schedules to this Agreement are hereby incorporated and made a part hereof as if set forth in full herein and are an integral part of this Agreement. All references to instruments, documents, Contracts and agreements are references to such instruments, documents, Contracts and agreements as the same may be amended, supplemented and otherwise modified from time to time, unless otherwise specified. The word “including” shall mean “including but not limited to” and shall not be construed to limit any general statement that it follows to the specific or similar items or matters immediately following it. Whenever the Partnership has an obligation under the Transaction Documents, the expense of complying with that obligation shall be an expense of the Partnership unless otherwise specified. Any reference in this Agreement to “$” shall mean U.S. dollars. Whenever any determination, consent or approval is to be made or given by a Purchaser, such action shall be in such Purchaser’s sole discretion, unless otherwise specified in this Agreement. If any provision in the Transaction Documents is held to be illegal, invalid, not binding or unenforceable, (a) such provision shall be fully severable and the Transaction Documents shall be construed and enforced as if such illegal, invalid, not binding or unenforceable provision had never comprised a part of the Transaction Documents, and the remaining provisions shall remain in full force and effect, and (b) the parties hereto shall negotiate in good faith to modify the Transaction Documents so as to effect the original intent of the parties as closely as possible in an acceptable

manner in order that the transactions contemplated hereby are consummated as originally contemplated to the greatest extent possible. When calculating the period of time before which, within which or following which any act is to be done or step taken pursuant to the Transaction Documents, the date that is the reference date in calculating such period shall be excluded. If the last day of such period is not a Business Day, the period in question shall end on the next succeeding Business Day. Any words imparting the singular number only shall include the plural and vice versa. The words such as “herein,” “hereinafter,” “hereof” and “hereunder” refer to this Agreement as a whole and not merely to a subdivision in which such words appear unless the context otherwise requires. The provision of a Table of Contents, the division of this Agreement into Articles, Sections and other subdivisions and the insertion of headings are for convenience of reference only and shall not affect or be utilized in construing or interpreting this Agreement.

Section 8.03 Survival of Provisions. The representations and warranties set forth in Section 3.01, Section 3.02, Section 3.13, Section 3.16, Section 3.18, Section 4.01, Section 4.02, Section 4.04, and Sections 4.05(a), (b) and (e) hereunder shall survive the execution and delivery of this Agreement indefinitely, the representations and warranties set forth in Section 3.27 shall survive until 60 days after the applicable statute of limitations (taking into account any extensions thereof) and the other representations and warranties set forth herein shall survive for a period of twelve (12) months following the Closing Date, regardless of any investigation made by or on behalf of the Partnership or the Purchasers. The covenants made in this Agreement or any other Transaction Document shall survive the Closing and remain operative and in full force and effect regardless of acceptance of any of the Purchased Units and payment therefor and repayment, conversion or repurchase thereof. Regardless of any purported general termination of this Agreement, the provisions of Article VI and all indemnification rights and obligations of the Partnership and the Purchasers thereunder, and this Article VIII shall remain operative and in full force and effect as between the Partnership and each Purchaser, unless the Partnership and the applicable Purchaser execute a writing that expressly (with specific references to the applicable Section or subsection of this Agreement) terminates such rights and obligations as between the Partnership and such Purchaser.

Section 8.04 No Waiver: Modifications in Writing.

(a) Delay. No failure or delay on the part of any party in exercising any right, power or remedy hereunder shall operate as a waiver thereof, nor shall any single or partial exercise of any such right, power or remedy preclude any other or further exercise thereof or the exercise of any other right, power or remedy. The remedies provided for herein are cumulative and are not exclusive of any remedies that may be available to a party at law or in equity or otherwise.

(b) Specific Waiver. Except as otherwise provided herein, no amendment, waiver, consent, modification or termination of any provision of any Transaction Document (except in the case of the Partnership Agreement for amendments adopted pursuant to Article XIII thereof) shall be effective unless signed by each of the parties thereto affected by such amendment, waiver, consent, modification or termination. Any amendment, supplement or modification of or to any provision of any Transaction Document, any waiver of any provision of any Transaction Document and any consent to any departure by the Partnership from the terms of any provision of any Transaction Document shall be effective only in the specific instance and

for the specific purpose for which made or given. Except where notice is specifically required by this Agreement, no notice to or demand on the Partnership in any case shall entitle the Partnership to any other or further notice or demand in similar or other circumstances. Any investigation by or on behalf of any party shall not be deemed to constitute a waiver by the party taking such action of compliance with any representation, warranty, covenant or agreement contained herein.

Section 8.05 Binding Effect. This Agreement shall be binding upon the Partnership, each of the Purchasers and their respective successors and permitted assigns. Except as expressly provided in this Agreement, this Agreement shall not be construed so as to confer any right or benefit upon any Person other than the parties to this Agreement and their respective successors and permitted assigns.

Section 8.06 Non-Disclosure.

(a) Stonepeak may share Confidential Information with (i) any of the limited partners of the private equity fund vehicles that indirectly own Stonepeak at any time; provided, that any such limited partner will be deemed to be a “Representative” of Stonepeak under its Confidentiality Agreement, and, (ii) during the Non-Affiliate Transfer Period, Stonepeak may, with the prior written consent of the Partnership (which consent shall not be unreasonably withheld, conditioned or delayed), share Confidential Information (as defined in Stonepeak’s Confidentiality Agreement) with any bona fide potential transferee of Purchased Units; provided, that such potential transferee executes a letter agreement with Stonepeak agreeing (A) that it and its representatives shall be deemed “Representatives” under Stonepeak’s Confidentiality Agreement and responsible for any breaches of such Confidentiality Agreement as if originally party thereto and (B) that the Partnership is an express third-party beneficiary of such letter. Except as set forth in the preceding sentence, this Agreement shall not impact the terms and provisions of any of the Confidentiality Agreements. Subject to the foregoing, the Confidentiality Agreements shall continue to be in full force and effect, pursuant to the terms and conditions thereof.

(b) Other than filings made by the Partnership with the Commission, the Partnership and any of its Representatives may disclose in writing the identity of, or any other information concerning, the Purchasers or any of their respective Affiliates only after providing the Purchasers a reasonable opportunity to review and comment on such written disclosure (with such comments being incorporated or reflected, to the extent reasonable, in any such written disclosure); provided, however, that nothing in this Section 8.06 shall delay any required filing or other disclosure with the NYSE or any Governmental Authority or otherwise hinder the Partnership Entities’ or their Representatives’ ability to timely comply with all Laws or rules and regulations of the Commission, the NYSE or other Governmental Authority.

(c) Notwithstanding anything to the contrary in this Section 8.06, the Partnership and the General Partner agree that the Purchasers may (i) publicize their ownership in the Partnership, as well as the identity of the Partnership, the size of the investment and its pricing terms with respect to the Series A Preferred Units on its internet site or in marketing materials, press releases, published “tombstone” announcements or any other print or electronic medium and (ii) display the Partnership’s corporate logo in conjunction with any such reference.

Section 8.07 Communications. All notices and demands provided for hereunder shall be in writing and shall be given by registered or certified mail, return receipt requested, telecopy, electronic mail, air courier guaranteeing overnight delivery or personal delivery to the following addresses

(a) If to the Purchasers, to the addresses set forth on Schedule A.

(b) If to the Partnership:

MPLX LP

1515 Arapahoe Street, Tower 1, Suite 1600

Denver, CO 80202

Attention: Executive Vice President, Chief Financial Officer

Executive Vice President, General Counsel

Facsimile: (303) 542-8779

(303) 925-9308

Email: nbuese@markwest.com
cbromley@markwest.com

with a copies to (which shall not constitute notice):

Marathon Petroleum Corporation

539 S. Main St.

Findlay, Ohio 45840

Attention: Suzanne Gagle, Vice President and General Counsel

Email: sgagle@marathonpetroleum.com

Vinson & Elkins L.L.P.

1001 Fannin Street

Suite 2500

Houston TX 77002-6760

Attention: David Oelman

Facsimile: (713) 615-5620

Email: doelman@velaw.com

or to such other address as the Partnership or the Purchasers may designate in writing. All notices and communications shall be deemed to have been duly given: at the time delivered by hand, if personally delivered; upon actual receipt if sent by certified or registered mail, return receipt requested, or regular mail, if mailed; upon actual receipt of the facsimile, if sent via facsimile; when sent, if sent by electronic mail prior to 5 pm Houston, Texas time on a Business Day, or on the next succeeding Business Day, if not; and upon actual receipt when delivered to an air courier guaranteeing overnight delivery.

Section 8.08 Removal of Legend. In connection with a sale of Purchased Units or Conversion Units by a Purchaser in reliance on Rule 144 promulgated under the Securities Act, the applicable Purchaser or its broker shall deliver to the Partnership a broker representation letter providing to the Partnership any information the Partnership deems necessary to determine that

the sale of such Units is made in compliance with Rule 144 promulgated under the Securities Act, including, as may be appropriate, a certification that the Purchaser is not an Affiliate of the Partnership (as defined in Rule 144 promulgated under the Securities Act) and a certification as to the length of time the such units have been held. Upon receipt of such representation letter, the Partnership shall promptly remove the notation of a restrictive legend in such Purchaser’s book-entry account maintained by the Partnership, including the legend referred to in Section 4.05, and the Partnership shall bear all costs associated with the removal of such legend in the Partnership’s books. At such time as the Conversion Units have been sold pursuant to an effective registration statement under the Securities Act or the Purchased Units or the Conversion Units have been held by any Purchaser for more than one year where such Purchaser is not, and has not been in the preceding three months, an affiliate of the Partnership (as defined in Rule 144 promulgated under the Securities Act), if the book-entry account of such Purchaser still bears the notation of the restrictive legend referred to in Section 4.05, the Partnership agrees, upon request of the Purchaser or its permitted assignee, to take all steps necessary to promptly effect the removal of the legend described in Section 4.05, and the Partnership shall bear all costs associated with the removal of such legend in the Partnership’s books, regardless of whether the request is made in connection with a sale or otherwise, so long as such Purchaser or its permitted assigns provide to the Partnership any information the Partnership deems reasonably necessary to determine that the legend is no longer required under the Securities Act or applicable state Laws, including (if there is no such registration statement) a certification that the holder is not an Affiliate of the Partnership (as defined in Rule 144 promulgated under the Securities Act) and to consent to the notation of an appropriate restriction, as well as a covenant to inform the Partnership if it should thereafter become an affiliate (as defined in Rule 144 promulgated under the Securities Act), and a certification as to the length of time such units have been held. The Partnership shall cooperate with each Purchaser to effect the removal of the legend referred to in Section 4.05 at any time such legend is no longer appropriate.

Section 8.09 Entire Agreement. This Agreement, the other Transaction Documents, the Confidentiality Agreements and the other agreements and documents referred to herein are intended by the parties as a final expression of their agreement and intended to be a complete and exclusive statement of the agreement and understanding of the parties hereto in respect of the subject matter contained herein and therein. There are no restrictions, promises, warranties or undertakings, other than those set forth or referred to in this Agreement, the other Transaction Documents or the Confidentiality Agreements with respect to the rights granted by the Partnership or any of its Affiliates or the Purchasers or any of their respective Affiliates. This Agreement, the other Transaction Documents, the Confidentiality Agreements and the other agreements and documents referred to herein or therein supersede all prior agreements and understandings among the parties with respect to such subject matter.

Section 8.10 Assignment. Prior to the Closing, Stonepeak and its Affiliates may transfer or assign their rights to purchase Purchased Units under this Agreement to one or more Persons, subject to the consent of the Partnership as to the identity of the transferee (which consent shall not be unreasonably withheld, conditioned or delayed); provided, however, that (a) any assignment made pursuant to this Section 8.10 must consist of the right and related obligations to purchase Purchased Units in an amount not less than $25 million based on the Unit Purchase Price, (b) the aggregate amount of Purchased Units and rights to purchase Purchased Units transferred pursuant to this

Section 8.10 and the last sentence of Section 5.04 shall not be greater than $100 million based on the Unit Purchase Price, (c) any assignee of Stonepeak’s or its Affiliates’ rights pursuant to this Section 8.10 must execute and deliver to the Partnership at the Closing a Joinder Agreement in the form attached hereto as Exhibit D (the “Joinder Agreement”) and (d) a maximum of two transfers may be made pursuant to this Section 8.10 and the last sentence of Section 5.04. If, and only if, such assignee consummates the purchase at the Closing, then concurrently with the Closing, the assignor shall be released in full from its obligations under this Agreement with respect to the assigned portion of the Purchased Units and the assignee shall be considered a Purchaser hereunder with respect to such portion of the Purchased Units. Prior to and until the Closing occurs, the assignor shall remain fully responsible for its obligations under the Agreement, notwithstanding any execution of a Joinder Agreement by the assignee. In the event of any such assignment, Schedule A shall be amended to reflect the assignee as an additional or alternate Purchaser and the corresponding number of Purchased Units to be purchased by such assignee.

Section 8.11 Governing Law: Submission to Jurisdiction. This Agreement, and all claims or causes of action (whether in contract or tort) that may be based upon, arise out of or relate to this Agreement or the negotiation, execution or performance of this Agreement (including any claim or cause of action based upon, arising out of or related to any representation or warranty made in or in connection with this Agreement), will be construed in accordance with and governed by the Laws of the State of Delaware without regard to principles of conflicts of laws. Any action against any party relating to the foregoing shall be brought in any federal or state court of competent jurisdiction located within the State of Delaware, and the parties hereto hereby irrevocably submit to the non-exclusive jurisdiction of any federal or state court located within the State of Delaware over any such action. The parties hereby irrevocably waive, to the fullest extent permitted by applicable Law, any objection which they may now or hereafter have to the laying of venue of any such dispute brought in such court or any defense of inconvenient forum for the maintenance of such dispute. Each of the parties hereto agrees that a judgment in any such dispute may be enforced in other jurisdictions by suit on the judgment or in any other manner provided by Law.

Section 8.12 Waiver of Jury Trial. THE PARTIES TO THIS AGREEMENT EACH HEREBY WAIVES, AND AGREES TO CAUSE ITS AFFILIATES TO WAIVE, TO THE FULLEST EXTENT PERMITTED BY LAW, ANY RIGHT TO TRIAL BY JURY OF ANY CLAIM, DEMAND, ACTION OR CAUSE OF ACTION (a) ARISING UNDER THIS AGREEMENT OR (b) IN ANY WAY CONNECTED WITH OR RELATED OR INCIDENTAL TO THE DEALINGS OF THE PARTIES HERETO IN RESPECT OF THIS AGREEMENT OR ANY OF THE TRANSACTIONS RELATED HERETO, IN EACH CASE WHETHER NOW EXISTING OR HEREAFTER ARISING, AND WHETHER IN CONTRACT, TORT, EQUITY OR OTHERWISE. THE PARTIES TO THIS AGREEMENT EACH HEREBY AGREES AND CONSENTS THAT ANY SUCH CLAIM, DEMAND, ACTION OR CAUSE OF ACTION SHALL BE DECIDED BY COURT TRIAL WITHOUT A JURY AND THAT THE PARTIES TO THIS AGREEMENT MAY FILE AN ORIGINAL COUNTERPART OF A COPY OF THIS AGREEMENT WITH ANY COURT AS WRITTEN EVIDENCE OF THE CONSENT OF THE PARTIES HERETO TO THE WAIVER OF THEIR RIGHT TO TRIAL BY JURY.

Section 8.13 Exclusive Remedy.

(a) Each party hereto hereby acknowledges and agrees that the rights of each party to consummate the transactions contemplated hereby are special, unique and of extraordinary character and that, if any party violates or fails or refuses to perform any covenant or agreement made by it herein, the non-breaching party may be without an adequate remedy at law. If any party violates or fails or refuses to perform any covenant or agreement made by such party herein, the non-breaching party subject to the terms hereof and in addition to any remedy at law for damages or other relief, may (at any time prior to the valid termination of this Agreement pursuant to Article VII) institute and prosecute an action in any court of competent jurisdiction to enforce specific performance of such covenant or agreement or seek any other equitable relief.

(b) The sole and exclusive remedy for any and all claims arising under, out of, or related to this Agreement or the transactions contemplated hereby, shall be the rights of indemnification set forth in Article VI only, and no Person will have any other entitlement, remedy or recourse, whether in contract, tort or otherwise, it being agreed that all of such other remedies, entitlements and recourse are expressly waived and released by the parties hereto to the fullest extent permitted by Law. Notwithstanding anything in the foregoing to the contrary, nothing in this Agreement shall limit or otherwise restrict a fraud claim brought by any party hereto or the right to seek specific performance pursuant to Section 8.13(a).

Section 8.14 No Recourse Against Others.

(a) All claims, obligations, liabilities or causes of action (whether in contract or in tort, in law or in equity, or granted by statute) that may be based upon, in respect of, arise under, out or by reason of, be connected with or relate in any manner to this Agreement, or the negotiation, execution or performance of this Agreement (including any representation or warranty made in, in connection with, or as an inducement to, this Agreement), may be made only against (and are expressly limited to) the Partnership and the Purchasers. No Person other than the Partnership or the Purchasers, including no member, partner, stockholder, Affiliate or Representative thereof, nor any member, partner, stockholder, Affiliate or Representative of any of the foregoing, shall have any liability (whether in contract or in tort, in law or in equity, or granted by statute) for any claims, causes of action, obligations or liabilities arising under, out of, in connection with or related in any manner to this Agreement or based on, in respect of or by reason of this Agreement or its negotiation, execution, performance or breach; and, to the maximum extent permitted by Law, each of the Partnership and the Purchasers hereby waives and releases all such liabilities, claims, causes of action and obligations against any such third Person.

(b) Without limiting the foregoing, to the maximum extent permitted by Law, (i) each of the Partnership and the Purchasers hereby waives and releases any and all rights, claims, demands or causes of action that may otherwise be available at law or in equity, or granted by statute, to avoid or disregard the entity form of the other or otherwise impose liability of the other on any third Person in respect of the transactions contemplated hereby, whether granted by statute or based on theories of equity, agency, control, instrumentality, alter ego, domination, sham, single business enterprise, piercing the veil, unfairness, undercapitalization or otherwise; and (ii) each of the Partnership and the Purchasers disclaims any reliance upon any third Person with respect to the performance of this Agreement or any representation or warranty made in, in connection with or as an inducement to this Agreement.

Section 8.15 No Third-Party Beneficiaries. Nothing in this Agreement, express or implied, is intended to or shall confer upon any Person, other than the Partnership, the Purchasers and, for purposes of Section 8.14 only, any member, partner, stockholder, Affiliate or Representative of the Partnership or the Purchasers, or any member, partner, stockholder, Affiliate or Representative of any of the foregoing, any right, benefit or remedy of any nature whatsoever under or by reason of this Agreement.

Section 8.16 Execution in Counterparts. This Agreement may be executed in any number of counterparts and by different parties hereto in separate counterparts, each of which counterparts, when so executed and delivered, shall be deemed to be an original and all of which counterparts, taken together, shall constitute but one and the same agreement.

[Signature Page to Follow.]

IN WITNESS WHEREOF, the parties hereto execute this Agreement, effective as of the date first above written.



MPLX LP
By:	MPLX GP LLC, its general partner
	By:	/s/ Nancy K. Buese
	Name:	Nancy K. Buese
	Title:	Executive Vice President and Chief Financial Officer