VIPER ENERGY PARTNERS LP 9,500,000 Common Units Representing Limited Partner Interests UNDERWRITING AGREEMENT

Exhibit 1.1

VIPER ENERGY PARTNERS LP

9,500,000 Common Units

Representing Limited Partner Interests

UNDERWRITING AGREEMENT

February 26, 2019

CREDIT SUISSE SECURITIES (USA) LLC

As Representative of the Several Underwriters

c/o Credit Suisse Securities (USA) LLC

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▇▇▇ ▇▇▇▇, ▇▇▇ ▇▇▇▇ ▇▇▇▇▇

Ladies and Gentlemen:

Viper Energy Partners LP, a Delaware limited partnership (the “Partnership”), proposes to sell 9,500,000 common units (the “Firm Units”) representing limited partner interests in the Partnership (the “Common Units”) to the underwriters (the “Underwriters”) named in Schedule I attached to this agreement (this “Agreement”). In addition, the Partnership proposes to grant to the Underwriters an option to purchase up to 1,425,000 Common Units on the terms set forth in Section 2 to cover over-allotments, if any (the “Option Units”). The Firm Units and the Option Units, if purchased, are hereinafter collectively called the “Units.” This Agreement is to confirm the agreement concerning the purchase of the Units from the Partnership by the Underwriters.

The Partnership, Viper Energy Partners GP LLC, a Delaware limited liability company and the general partner of the Partnership (the “General Partner”), and Viper Energy Partners LLC, a Delaware limited liability company (“OpCo”), are collectively called the “Partnership Entities.” The “Organizational Agreements” means, collectively, the Second Amended and Restated Agreement of Limited Partnership of the Partnership (as it may be amended from time to time, the “Partnership Agreement”), the First Amended and Restated Limited Liability Company Agreement of the General Partner (as it may be amended from time to time, the “General Partner LLC Agreement”) and the Second Amended and Restated Limited Liability Company Agreement of OpCo (as it may be amended from time to time, the “OpCo LLC Agreement”).

1. Representations, Warranties and Agreements of the Partnership Entities. The Partnership Entities, jointly and severally, represent, warrant and agree that:

(a) A registration statement on Form S-3 (File No. 333-226411), including a related prospectus or prospectuses, relating to the Units has (i) been prepared by the Partnership in conformity with the requirements of the Securities Act of 1933, as amended (the “Securities Act”), and the rules and regulations of the Securities and Exchange Commission (the “Commission”) thereunder; (ii) been filed with the Commission under the Securities Act; and (iii) become effective under the Securities Act. Copies of such registration statement and any amendment thereto have been delivered by the Partnership to you as the representative (the “Representative”) of the Underwriters. As used in this Agreement:

(i) “Applicable Time” means 6:10 p.m. (New York City time) on February 26, 2019;

(ii) “Effective Date” means the date and time as of which such registration statement, or the most recent post-effective amendment thereto, if any, was declared effective by the Commission;

(iii) “Issuer Free Writing Prospectus” means each “issuer free writing prospectus” (as defined in Rule 433 under the Securities Act);

(iv) “Preliminary Prospectus” means any preliminary prospectus (including any preliminary prospectus supplement) relating to the Units included in such registration statement or filed with the Commission pursuant to Rule 424(b) under the Securities Act;

(v) “Pricing Disclosure Package” means, as of the Applicable Time, the most recent Preliminary Prospectus, together with the information included in Schedule II hereto and each Issuer Free Writing Prospectus filed or used by the Partnership on or before the Applicable Time, other than a road show that is an Issuer Free Writing Prospectus but is not required to be filed under Rule 433 under the Securities Act;

(vi) “Prospectus” means the final prospectus (including any prospectus supplement) relating to the Units, as filed with the Commission pursuant to Rule 424(b) under the Securities Act;

(vii) “Registration Statement” means such registration statement, as amended as of the Effective Date, including any Preliminary Prospectus or the Prospectus, all exhibits to such registration statement and including the information deemed by virtue of Rule 430B under the Securities Act to be part of such registration statement as of the Effective Date;

(viii) “Testing-the-Waters Communication” means any oral or written communication with potential investors undertaken in reliance on Section 5(d) of the Securities Act; and

(ix) “Written Testing-the-Waters Communication” means any Testing-the-Waters Communication that is a written communication within the meaning of Rule 405 under the Securities Act.

Any reference to any Preliminary Prospectus or the Prospectus shall be deemed to refer to and include any documents incorporated by reference therein pursuant to Form S-3 under the Securities Act, which were filed under the Securities Exchange Act of 1934, as amended (the “Exchange Act”), as of the date of such Preliminary Prospectus or the Prospectus, as the case may be. Any reference to the “most recent Preliminary Prospectus” shall be deemed to refer to the latest Preliminary Prospectus included in the Registration Statement or filed pursuant to Rule 424(b) under the Securities Act prior to or on the date hereof. Any reference to any amendment or supplement to any Preliminary Prospectus or the Prospectus shall be deemed to refer to and include any document filed under the Exchange Act after the date of such Preliminary Prospectus or the Prospectus, as the case may be, and before the date of such amendment or supplement and incorporated by reference in such Preliminary Prospectus or the Prospectus, as the case may be; and any reference to any amendment to the Registration Statement shall be deemed to include any document filed with the Commission pursuant to Section 13(a), 14 or 15(d) of the Exchange Act after the Effective Date and before the date of such amendment that is incorporated by reference in the Registration Statement. Any reference herein to the term “Registration Statement” shall be deemed to include any abbreviated registration statement to register additional Common Units under Rule 462(b) under the Securities Act (the “Rule 462(b) Registration Statement”). The Commission has not issued any order preventing or suspending the use of any Preliminary Prospectus or the Prospectus or suspending the effectiveness of the Registration Statement, and no proceeding or examination for such purpose has been instituted or threatened by the Commission. The Commission has not notified the Company of any objection to the use of the form of the Registration Statement or any post-effective amendment thereto.

(b) The Partnership (i) has not engaged in any Testing-the-Waters Communication and (ii) has not authorized anyone to engage in Testing-the-Waters Communications.

(c) The Partnership was not at the time of initial filing of the Registration Statement and at the earliest time thereafter that the Partnership or another offering participant made a bona fide offer (within the meaning of Rule 164(h)(2) under the Securities Act) of the Units, is not on the date hereof and will not be on the applicable Delivery Date (as defined below), an “ineligible issuer” (as defined in Rule 405 under the Securities Act).

(d) The Registration Statement conformed and will conform in all material respects on the Effective Date and on the applicable Delivery Date, and any amendment to the Registration Statement filed after the date hereof will conform in all material respects when filed, to the requirements of the Securities Act and the rules and regulations thereunder. The most recent Preliminary Prospectus conformed, and the Prospectus will conform, in all material respects when filed with the Commission pursuant to Rule 424(b) under the Securities Act and on the applicable Delivery Date to the requirements of the Securities Act and the rules and regulations thereunder. The documents incorporated by reference in any Preliminary Prospectus or the Prospectus conformed, and any further documents so incorporated will conform, when filed with the Commission, in all material respects to the requirements of the Exchange Act or the Securities Act, as applicable, and the rules and regulations of the Commission thereunder.

(e) The Registration Statement did not, as of the Effective Date, contain an untrue statement of a material fact or omit to state a material fact required to be stated therein or necessary to make the statements therein not misleading; provided that no representation or warranty is made as to information contained in or omitted from the Registration Statement in reliance upon and in conformity with written information furnished to the Partnership through the Representative by or on behalf of any Underwriter specifically for inclusion therein, which information is specified in Section 8(e).

(f) The Prospectus will not, as of its date or as of the applicable Delivery Date, contain an untrue statement of a material fact or omit to state a material fact required to be stated therein or necessary to make the statements therein, in the light of the circumstances under which they were made, not misleading; provided that no representation or warranty is made as to information contained in or omitted from the Prospectus in reliance upon and in conformity with written information furnished to the Partnership through the Representative by or on behalf of any Underwriter specifically for inclusion therein, which information is specified in Section 8(e).

(g) The documents incorporated by reference in any Preliminary Prospectus or the Prospectus did not, and any further documents filed and incorporated by reference therein will not, when filed with the Commission, contain any untrue statement of a material fact or omit to state a material fact necessary to make the statements therein, in the light of the circumstances under which they were made, not misleading.

(h) The Pricing Disclosure Package did not, as of the Applicable Time, contain an untrue statement of a material fact or omit to state a material fact necessary to make the statements therein, in the light of the circumstances under which they were made, not misleading; provided that no representation or warranty is made as to information contained in or omitted from the Pricing Disclosure Package in reliance upon and in conformity with written information furnished to the Partnership through the Representative by or on behalf of any Underwriter specifically for inclusion therein, which information is specified in Section 8(e).

(i) Each Issuer Free Writing Prospectus listed in Schedule III hereto, when taken together with the Pricing Disclosure Package, did not, as of the Applicable Time, contain an untrue statement of a material fact or omit to state a material fact necessary to make the statements therein, in the light of the circumstances under which they were made, not misleading; provided that no representation or warranty is made as to information contained in or omitted from such Issuer Free Writing Prospectus listed in Schedule III hereto in reliance upon and in conformity with written information furnished to the Partnership through the Representative by or on behalf of any Underwriter specifically for inclusion therein, which information is specified in Section 8(e).

(j) Each Issuer Free Writing Prospectus conformed or will conform in all material respects to the requirements of the Securities Act and the rules and regulations thereunder on the date of first use, and the Partnership has complied with all prospectus delivery and any filing requirements applicable to such Issuer Free Writing Prospectus pursuant to the Securities Act and rules and regulations thereunder. The Partnership has not made any offer relating to the Units that would constitute an Issuer Free Writing Prospectus without the prior written consent of the Representative. The Partnership has retained in accordance with the Securities Act and the rules and regulations thereunder all Issuer Free Writing Prospectuses that were not required to be filed pursuant to the Securities Act and the rules and regulations thereunder. The Partnership has taken all actions necessary so that any “road show” (as defined in Rule 433 under the Securities Act) in connection with the offering of Units will not be required to be filed pursuant to the Securities Act and the rules and regulations thereunder.

(k) Each of the statements made by the Partnership in the Registration Statement and the Pricing Disclosure Package and to be made in the Prospectus (and any supplements thereto) within the coverage of Rule 175(b) under the Securities Act was made or will be made with a reasonable basis and in good faith.

(l) Each of the Partnership Entities has been duly organized, is validly existing and in good standing as a limited partnership or limited liability company, as applicable, under the laws of its jurisdiction of organization with power and authority to own and/or lease its properties and conduct its business as described in the Pricing Disclosure Package; and each of the Partnership Entities is duly qualified to do business as a foreign limited partnership or limited liability company, as applicable, in good standing in all other jurisdictions in which its ownership or lease of property or the conduct of its business requires such qualification, except where the failure to so qualify or to be in good standing in such other jurisdictions would not reasonably be expected to, individually or in the aggregate, (i) result in a material adverse effect on the condition (financial or otherwise), results of operations, business, properties or prospects of the Partnership Entities taken as a whole (a “Material Adverse Effect”), or (ii) materially impair the ability of any of the Partnership Entities to consummate the offering of the Units or any other transactions provided for in this Agreement.

(m) The General Partner has, and at each Delivery Date will have, full limited liability company power and authority to serve as general partner of the Partnership in all material respects as disclosed in the Registration Statement and the most recent Preliminary Prospectus.

(n) Diamondback Energy, Inc., a Delaware corporation (the “Sponsor”), owns a 100% membership interest in the General Partner; such membership interest has been duly authorized and validly issued in accordance with the General Partner LLC Agreement, and the Sponsor has no obligation to make further payments for the purchase of such membership interest; and the Sponsor owns such membership interest free and clear of all liens, encumbrances, security interests, equities, charges or claims (“Liens”), except for restrictions on transferability contained in the General Partner LLC Agreement or as described in the Registration Statement, the Pricing Disclosure Package and the Prospectus, if any.

(o) OpCo is the Partnership’s only “significant” subsidiary, as defined in Rule 1-02 of Regulation S-X. The Sponsor owns 72,418,500 units representing limited liability company interests in OpCo (the “OpCo Units”), and the Partnership owns 41,470,777 OpCo Units. All of the limited liability company interests in OpCo have been duly authorized and validly issued in accordance with the OpCo LLC Agreement, and the Sponsor and the Partnership have no obligation to make further payments for the purchase of such membership interest; and the Sponsor and the Partnership own such membership interest in OpCo free and clear of all Liens; except for (i) those arising under the Partnership’s Senior Secured Revolving Credit Agreement, dated as of July 8, 2014, as may be amended, restated, supplemented or otherwise modified from time to time, (ii) restrictions on transferability contained in the OpCo LLC Agreement or (iii) as described in the Registration Statement, the Pricing Disclosure Package and the Prospectus, if any.

(p) The General Partner is, and at each applicable Delivery Date, will be, the sole general partner of the Partnership, with a non-economic 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 has no obligation to make further payments for the purchase of such general partner interest; and the General Partner owns such general partner interest free and clear of all Liens, except for restrictions on transferability contained in the Partnership Agreement or as described in the Registration Statement, the Pricing Disclosure Package and the Prospectus, if any.

(q) The Sponsor owns (i) 731,500 Common Units (the “Sponsor Common Units”) and (ii) 72,418,500 Class B Units (together with the Sponsor Common Units, the “Sponsor Units”) representing limited partner interests in the Partnership (the “Class B Units”); the Sponsor Units have been duly authorized and validly issued in accordance with the Partnership Agreement, and the Sponsor has no obligation to make further payments for the purchase of such Sponsor Units; and the Sponsor owns all of the Sponsor Units free and clear of all Liens, except for restrictions on transferability contained in the Partnership Agreement or as described in the Registration Statement, the Pricing Disclosure Package and the Prospectus, if any.

(r) At each applicable Delivery Date, the Units to be sold by the Partnership and the limited partner interests represented thereby will have been duly authorized in accordance with the Partnership Agreement and, when issued and delivered to the Underwriters against payment therefor in accordance with this Agreement, will have been validly issued; the unitholders purchasing such Units do not have any obligation to make further payments for the purchase of such Units. At the Initial Delivery Date, after giving effect to the offering of the Firm Units as contemplated by this Agreement and assuming no exercise of the option provided in Section 2, the issued and outstanding limited partnership interests of the Partnership will consist of 51,653,956 Common Units and the 72,418,500 Class B Units.

(s) The Units, when issued and delivered in accordance with the terms of the Partnership Agreement and this Agreement against payment therefor as provided therein and herein will conform in all material respects to the description thereof contained in the Registration Statement and the Pricing Disclosure Package and to be contained in the Prospectus.

(t) Except as described in the Registration Statement and the most recent Preliminary Prospectus, there are no profits interests, options, warrants, preemptive rights, rights of first refusal or other rights to subscribe for or to purchase, nor any restriction upon the voting or transfer of, any equity securities of any of the Partnership Entities, in each case pursuant to the Organizational Agreement of any such Partnership Entity, the certificates of limited partnership or formation or any other organizational documents of any such Partnership Entity or any other agreement or other instrument to which any such Partnership Entity is a party or by which any such Partnership Entity may be bound. Except for such rights that have been waived or as described in the Registration Statement, the Pricing Disclosure Package and the Prospectus, neither the filing of the Registration Statement nor the offering or sale of the Units as contemplated by this Agreement gives rise to any rights for or relating to the registration of any Common Units or other securities of the Partnership.

(u) Each of the Partnership Entities has all requisite power and authority to execute, deliver and perform its obligations under this Agreement. The Partnership has all requisite limited partnership power and authority to issue, sell and deliver the Units in accordance with and upon the terms and conditions set forth in this Agreement, the Partnership Agreement, the Registration Statement and the most recent Preliminary Prospectus. At each Delivery Date, all limited partnership or limited liability company action, as the case may be, required to be taken by any of the Partnership Entities or any of their respective unitholders, members or partners for the authorization, issuance, sale and delivery of the Units and the consummation of any other transactions contemplated by this Agreement, shall have been validly taken.

(v) This Agreement has been duly and validly authorized, executed and delivered by each of the Partnership Entities.

(w) The statements in the Registration Statement and Pricing Disclosure Package under the captions “Description of the Units,” “How We Make Distributions on Our Limited Partnership Interests,” “The Partnership Agreement,” “The Operating Company Limited Liability Company Agreement” and “Material U.S. Federal Income Tax Consequences” insofar as they purport to summarize the provisions of the legal matters and documents referred to therein, are accurate summaries in all material respects. There are no contracts or other documents required to be described in the Registration Statement or the most recent Preliminary Prospectus or filed as exhibits to the Registration Statement, that are not described and filed as required. The statements made in the most recent Preliminary Prospectus, insofar as they purport to constitute summaries of the terms of the contracts and other documents described and filed, constitute accurate summaries of the terms of such contracts and documents in all material respects.

(x) The Common Units are listed on The Nasdaq Global Select Market.

(y) The Partnership has not distributed and, prior to the later to occur of any Delivery Date and completion of the distribution of the Units, will not distribute any offering material in connection with the offering and sale of the Units other than any Preliminary Prospectus, the Prospectus and any Issuer Free Writing Prospectus to which the Representative has consented in accordance with Section 5(a)(vi) and any press release or other announcement permitted by Rule 134 or Rule 135 under the Securities Act.

(z) No consent, approval, authorization, or order of, or filing or registration with any governmental agency or body or any court having jurisdiction over any of the Partnership Entities or any of their properties or assets is required to be obtained or made by the Partnership for the consummation of the transactions contemplated by this Agreement in connection with the sale of the Units, except such as (i) have been obtained or made, (ii) may be required under state securities laws, the Securities Act or the Exchange Act, by the Nasdaq Global Select Market or by the Financial Industry Regulatory Authority (“FINRA”) and (iii) the absence or omission of which would not reasonably be expected to materially impair the ability of any of the Partnership Entities to consummate the transactions contemplated by this Agreement.

(aa) Except as disclosed in the Pricing Disclosure Package, each of the Partnership Entities has (i) good and defensible title to all of the interests in oil and gas properties underlying its estimates of its net proved reserves contained or incorporated by reference in the Pricing Disclosure Package and (ii) good and marketable title to all other real and personal property reflected in the Pricing Disclosure Package as assets owned by it, in each case free and clear of all liens, encumbrances and defects, except such as (x) are described in the Registration Statement, the Pricing Disclosure Package and the Prospectus or (y) do not materially affect the value of the properties of the Partnership Entities and do not interfere in any material respect with the use made or proposed to be made of such properties by the Partnership Entities.

(bb) Each of the Partnership Entities has such consents, easements, rights-of-way or licenses from any person (collectively, “rights-of-way”) as are necessary to enable it to conduct its business in the manner described in the Pricing Disclosure Package, subject to qualifications as may be set forth in the Pricing Disclosure Package, except where failure to have such rights-of-way would not reasonably be expected to, individually or in the aggregate, have a Material Adverse Effect.

(cc) ▇▇▇▇▇ ▇▇▇▇▇ Company, L.P., a reserve engineer that prepared reserve reports on estimated net proved oil and natural gas reserves with respect to the mineral interests held by OpCo, as of December 31, 2018, December 31, 2017 and December 31, 2016 was, as of the date of preparation of such reserve reports, and is, as of the date hereof, an independent petroleum engineer with respect to the Partnership Entities.

(dd) The information contained or incorporated by reference in the Pricing Disclosure Package regarding estimated proved reserves is based upon the reserve reports prepared by ▇▇▇▇▇ ▇▇▇▇▇ Company, L.P. The information provided to ▇▇▇▇▇ ▇▇▇▇▇ Company, L.P. by the Partnership Entities, including, without limitation, information as to production, costs of operation and development, current prices for production, agreements relating to current and future operations and sales of production, was true and correct in all material respects on the dates that such reports were made. Such information was provided to ▇▇▇▇▇ ▇▇▇▇▇ Company, L.P. in accordance with all customary industry practices.

(ee) The reserve reports prepared by ▇▇▇▇▇ ▇▇▇▇▇ Company, L.P. setting forth the estimated proved reserves with respect to the mineral interests held by OpCo accurately reflect in all material respects the ownership interests of OpCo in the properties therein. Other than normal production of reserves, intervening market commodity price fluctuations, fluctuations in demand for such products, adverse weather conditions, unavailability or increased costs of rigs, equipment, supplies or personnel, the timing of third party operations and other facts, in each case in the ordinary course of business, and except as disclosed in the Pricing Disclosure Package, none of the Partnership Entities is aware of any facts or circumstances that would result in a material adverse change in the aggregate net reserves, or the present value of future net cash flows therefrom, as described in the Pricing Disclosure Package and the reserve reports; and estimates of such reserves and present values as described in the Pricing Disclosure Package and reflected in the reserve reports comply in all material respects with the applicable requirements of Regulation S-X and Subpart 1200 of Regulation S-K under the Securities Act.

(ff) The execution, delivery and performance of this Agreement, and the issuance and sale of the Units will not result in a breach or violation of any of the terms and provisions of, or constitute a default under, or result in the imposition of any lien, charge or encumbrance upon any property or assets of the Partnership Entities pursuant to (i) the Organizational Agreements, the certificates of limited partnership or formation or any other organizational document of any Partnership Entity, (ii) any statute, rule, regulation or order of any governmental agency or body or any court, domestic or foreign, having jurisdiction over the Partnership Entities or any of their respective properties, or (iii) any agreement or instrument to which any Partnership Entity is a party or by which the Partnership Entities are bound or to which any of the properties of the Partnership Entities is subject, except in the case of clauses (ii) and (iii), for any breaches, violations, defaults, liens, charges or encumbrances, which, individually or in the aggregate, would not result in a Material Adverse Effect.

(gg) None of the Partnership Entities (i) is in violation of its respective charter, limited partnership agreement, limited liability company agreement or similar organizational documents, (ii) is in default (or with the giving of notice or lapse of time would be in default) under any existing obligation, agreement, covenant or condition contained in any indenture, loan agreement, mortgage, lease or other agreement or instrument to which any of them is a party or by which any of them is bound or to which any of the properties of any of them is subject or (iii) is in violation of any statute or any order, rule or regulation of any court or governmental agency or body having jurisdiction over it or its property or assets, except in the case of clauses (ii) and (iii), to the extent any such violation or default would not reasonably be expected to, individually or in the aggregate, result in a Material Adverse Effect.

(hh) The Partnership Entities possess all adequate certificates, authorizations, franchises, licenses and permits issued by appropriate federal, state, local or foreign regulatory bodies (collectively, “Licenses”) necessary or material to the conduct of the business now conducted or proposed in the Pricing Disclosure Package to be conducted by them, except where the failure to have obtained the same would not reasonably be expected to result in a Material Adverse Effect. The Partnership Entities are in compliance with the terms and conditions of all such Licenses, except where the failure to so comply would not reasonably be expected to, individually or in the aggregate, result in a Material Adverse Effect, and have not received any notice of proceedings relating to the revocation or modification of any Licenses that, if determined adversely to a Partnership Entity, would reasonably be expected to, individually or in the aggregate, result in a Material Adverse Effect.

(ii) Except as disclosed in the Pricing Disclosure Package, (a)(i) none of the Partnership Entities is in violation of, and does not have any liability under, any federal, state, local or non-U.S. statute, law, rule, regulation, ordinance, code, other requirement or rule of law (including common law), or decision or order of any domestic or foreign governmental agency, governmental body or court, relating to pollution, to the use, handling, transportation, treatment, storage, discharge, disposal or release of Hazardous Substances (as defined below), to the protection or restoration of the environment or natural resources, to health and safety including as such relates to exposure to Hazardous Substances, and to natural resource damages (collectively, “Environmental Laws”), (ii) to the knowledge of the Partnership Entities, none of the Partnership Entities owns, occupies, operates or uses any real property contaminated with Hazardous Substances, (iii) none of the Partnership Entities is conducting or funding any investigation, remediation, remedial action or monitoring of actual or suspected Hazardous Substances in the environment, (iv) to the knowledge of the Partnership Entities, none of the Partnership Entities is liable or allegedly liable for any release or threatened release of Hazardous

Substances, including at any off-site treatment, storage or disposal site, (v) none of the Partnership Entities is subject to any pending, or to the Partnership Entities’ knowledge threatened, claim by any governmental agency or governmental body or person arising under Environmental Laws or relating to Hazardous Substances, and (vi) the Partnership Entities have received and are in compliance with all, and have no liability under any, permits, licenses, authorizations, identification numbers or other approvals required under applicable Environmental Laws to conduct their business, except in each case covered by clauses (i) – (vi) such as would not, individually or in the aggregate, result in a Material Adverse Effect; (b) to the knowledge of the Partnership Entities, there are no facts or circumstances that would reasonably be expected to result in a violation of, liability under, or claim pursuant to any Environmental Law that would result in a Material Adverse Effect; and (c) in the ordinary course of its business, the Partnership Entities periodically evaluate the effect, including associated costs and liabilities, of Environmental Laws on the business, properties, results of operations and financial condition of the Partnership, and, on the basis of such evaluation, the Partnership Entities have reasonably concluded that such Environmental Laws will not, individually or in the aggregate, result in a Material Adverse Effect. For purposes of this subsection, “Hazardous Substances” means (A) petroleum and petroleum products, by-products or breakdown products, radioactive materials, asbestos-containing materials, polychlorinated biphenyls and mold, and (B) any other chemical, material or substance defined or regulated as toxic or hazardous or as a pollutant, contaminant or waste under Environmental Laws.

(jj) None of the Partnership Entities has taken, directly or indirectly, any action that is designed to or that has constituted or that would reasonably be expected to cause or result in the stabilization or manipulation of the price of any security of the Partnership to facilitate the sale or resale of the Units.

(kk) The Partnership has not sold or issued any securities that would be integrated with the offering of the Units contemplated by this Agreement pursuant to the Securities Act, the rules and regulations thereunder or the interpretations thereof by the Commission.

(ll) Except as disclosed in the Pricing Disclosure Package, there are no contracts, agreements or understandings between the Partnership and any person that would give rise to a valid claim against the Partnership or any Underwriter for a brokerage commission, finder’s fee or other like payment in connection with the offering and sale of the Units.

(mm) Any third-party statistical and market-related data included or incorporated by reference in the Registration Statement, Prospectus or Pricing Disclosure Package are based on or derived from sources that the Partnership believes to be reliable and accurate in all material respects.

(nn) Except as set forth in the Pricing Disclosure Package, the Partnership Entities and the Board of Directors of the General Partner (the “Board”) are in compliance with all applicable provisions of the ▇▇▇▇▇▇▇▇-▇▇▇▇▇ Act of 2002, the Exchange Act and the rules of the Nasdaq Global Select Market (the “Nasdaq Rules”). The Partnership maintains a system of internal controls, including, but not limited to, disclosure controls and procedures and internal controls over accounting matters and financial reporting (collectively, “Internal Controls”) that comply with the applicable provisions of the Exchange Act and the rules and regulations thereunder and the Nasdaq

Rules and are sufficient to provide reasonable assurances that (i) transactions are executed in accordance with management’s general or specific authorizations, (ii) transactions are recorded as necessary to permit preparation of financial statements in conformity with U.S. Generally Accepted Accounting Principles (“GAAP”) and to maintain accountability for assets, (iii) access to assets is permitted only in accordance with management’s general or specific authorization, and (iv) the recorded accounting for assets is compared with the existing assets at reasonable intervals and appropriate action is taken with respect to any differences. The Internal Controls are overseen by the Audit Committee of the Board (the “Audit Committee”) in accordance with Exchange Rules. The Partnership has not publicly disclosed or reported to the Audit Committee or the Board, and within the next 135 days the Partnership does not reasonably expect to publicly disclose or report to the Audit Committee or the Board, a significant deficiency, material weakness or fraud involving management or other employees who have a significant role in Internal Controls, any violation of, or failure to comply with, the applicable provisions of the Exchange Act and the rules and regulations thereunder and the Nasdaq Rules, or any matter which, if determined adversely, would result in a Material Adverse Effect.

(oo) Except as disclosed in the Pricing Disclosure Package, there are no pending actions, suits or proceedings (including any inquiries or investigations by any court or governmental agency or body, domestic or foreign) against or affecting the Partnership Entities or, to the knowledge of the Partnership Entities, any of their respective properties that, if determined adversely to a Partnership Entity, would reasonably be expected to, individually or in the aggregate, result in a Material Adverse Effect, or would materially and adversely affect the ability of the Partnership Entities to perform their respective obligations under this Agreement, or which are otherwise material in the context of the sale of the Units; and no such actions, suits or proceedings (including any inquiries or investigations by any court or governmental agency or body, domestic or foreign) are, to the knowledge of the Partnership Entities, threatened or contemplated.

(pp) The historical financial statements included or incorporated by reference in the Registration Statement and the Pricing Disclosure Package present fairly in all material respects the financial position of the Partnership at the dates and for the periods indicated, and such financial statements have been prepared in conformity with GAAP, applied on a consistent basis. ▇▇▇▇▇ ▇▇▇▇▇▇▇▇ LLP has certified the audited financial statements of the Partnership included or incorporated by reference in the Registration Statement, Pricing Disclosure Package and the Prospectus, and is an independent registered public accounting firm with respect to the Partnership as required by the Securities Act and the applicable rules and guidance from the Public Company Accounting Oversight Board (United States). The other financial and statistical data included or incorporated by reference in the Registration Statement, the Pricing Disclosure Package and the Prospectus present fairly, in all material respects, the information shown therein and such data has been compiled on a basis consistent with the financial statements presented therein and the books and records of the Partnership Entities. The Partnership Entities do not have any material liabilities or obligations, direct or contingent (including any off-balance sheet obligations or any “variable interest entities” within the meaning of Financial Accounting Standards Board Interpretation No. 46), not disclosed in the Registration Statement, the Pricing Disclosure Package and the Prospectus. There are no financial statements that are required to be included or incorporated by reference in the Registration Statement, the Pricing Disclosure Package or the Prospectus that are not included or incorporated by reference as required.

(qq) Except as disclosed in the Pricing Disclosure Package, since the end of the period covered by the latest audited financial statements included or incorporated by reference in the Pricing Disclosure Package, (i) there has been no change, nor any development or event involving a prospective change, in the condition (financial or otherwise), results of operations, business, properties or prospects of the Partnership Entities, taken as a whole, that is material and adverse, (ii) there has been no dividend or distribution of any kind declared, paid or made by the Partnership on any Common Units, (iii) there has been no material adverse change in the Common Units, short-term indebtedness, long-term indebtedness, net current assets or net assets of the Partnership Entities, (iv) there has been no material transaction entered into and there is no material transaction that is probable of being entered into by the Partnership Entities other than transactions in the ordinary course of business and (v) there has been no obligation, direct or contingent, that is material to the Partnership Entities taken as a whole, incurred by the Partnership Entities, except obligations incurred in the ordinary course of business.

(rr) None of the Partnership Entities is, and, after giving effect to the offering and sale of the Units and the application of the proceeds thereof as described in the Pricing Disclosure Package, will be an “investment company” as defined in the Investment Company Act of 1940 (the “Investment Company Act”).

(ss) Effective May 10, 2018, the Partnership has properly elected to be classified as an association taxable as a corporation for United States federal income tax purposes. Each of the Partnership Entities other than the Partnership is properly treated as a partnership or disregarded as an entity separate from its owner for United States federal income tax purposes.

(tt) No “nationally recognized statistical rating organization” as such term is defined for purposes of Section 3(a)(62) of the Exchange Act has rated any securities of the Partnership.

(uu) Except as disclosed in the Registration Statement and the Pricing Disclosure Package, the Partnership Entities are insured by insurers of recognized financial responsibility against such losses and risks and in such amounts as the Partnership reasonably believes are adequate for the conduct of their business. All such policies of insurance insuring the Partnership Entities are in full force and effect. The Partnership Entities are in compliance with the terms of such policies and instruments in all material respects; and there are no material claims by the Partnership Entities under any such policy or instrument as to which any insurance company is denying liability or defending under a reservation of rights clause. None of the Partnership Entities has any reason to believe that any of them will not be able to renew its existing insurance coverage as and when such coverage expires or to obtain similar coverage from similar insurers as may be necessary to continue its business at a cost that would not reasonably expected to have a Material Adverse Effect, except as disclosed in the Registration Statement and the Pricing Disclosure Package.

(vv) The Partnership Entities have filed all federal, state, local and non-U.S. tax returns that are required to be filed or have requested extensions thereof (except in any case in which the failure so to file would not reasonably be expected to result in a Material Adverse Effect); and, except as set forth in the Pricing Disclosure Package, the Partnership Entities have paid all taxes (including any assessments, fines or penalties) required to be paid by them, except for any such taxes, assessments, fines or penalties currently being contested in good faith or as would not reasonably be expected to, individually or in the aggregate, result in a Material Adverse Effect.

(ww) No relationship, direct or indirect, exists between or among any of the Partnership Entities on the one hand, and the directors, officers, unitholders, customers or suppliers of the Partnership Entities on the other hand, which is required to be described in the Pricing Disclosure Package which is not so described therein. The Prospectus will contain the same description of the matters set forth in the preceding sentence contained in the Pricing Disclosure Package.

(xx) None of the Partnership Entities or, to the knowledge of the Partnership Entities, any director, officer, agent, employee or other person associated with or acting on behalf of the Partnership Entities has (i) used any corporate funds for any unlawful contribution, gift, entertainment or other unlawful expense relating to political activity; (ii) made any direct or indirect unlawful payment or otherwise unlawfully provided anything of value to any foreign or domestic government official or employee, political party or official thereof, any candidate for political office and/or any other person while knowing that all or a portion of the payment will be offered, given or promised to any of the foregoing persons from corporate funds; (iii) violated or is in violation of any provision of U.S. Foreign Corrupt Practices Act of 1977 or other applicable anti-bribery or anti-corruption laws or regulations; or (iv) made any bribe, unlawful rebate, payoff, influence payment, kickback or other unlawful payment to any domestic government official or any foreign official or other foreign government employee. The Partnership Entities have instituted, maintain and enforce policies and procedures designed to promote and ensure compliance with all applicable anti-bribery and anti-corruption laws or regulations.

(yy) The operations of the Partnership Entities are and have been conducted at all times in compliance with applicable financial recordkeeping and reporting requirements, including those of the Currency and Foreign Transactions Reporting Act of 1970, as amended, the Bank Secrecy Act, as amended by Title III of the Uniting and Strengthening America by Providing Appropriate Tools Required to Intercept and Obstruct Terrorism Act of 2001 (USA Patriot Act), the anti-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 agency (collectively, the “Anti-Money Laundering Laws”) and no action, suit or proceeding by or before any court or governmental agency, authority or body or any arbitrator involving any of the Partnership Entities with respect to the Anti-Money Laundering Laws is pending or, to the knowledge of the Partnership Entities, threatened.

(zz) None of the Partnership Entities or, to the knowledge of the Partnership Entities, any director, officer, agent, employee, affiliate or other person associated with or acting on behalf of the Partnership Entities is (i) currently subject to or the target of any sanctions administered or enforced by the U.S. government (including, without limitation, sanctions administered by the Office of Foreign Assets Control of the U.S. Department of the Treasury or the U.S. Department of State and including, without limitation, persons included on the “Specially Designated Nationals and Blocked Persons List”); and the Partnership Entities will not directly or indirectly use the proceeds of the offering, or lend, knowingly contribute or otherwise make available such proceeds to any subsidiary, joint venture partner or other person or entity, for the purpose of financing or facilitating the activities or business of any person that, at the time of such financing or facilitation, is the subject to or target of any sanctions administered or enforced by the U.S. government.

(aaa) OpCo is not prohibited, directly or indirectly, from paying any distributions to the Partnership, from making any other distribution on such subsidiary’s equity interests, from repaying to the Partnership any loans or advances to such subsidiary from the Partnership or from transferring any of such subsidiary’s property or assets to the Partnership or any other subsidiary of the Partnership.

(bbb) Each Partnership Entity’s information technology assets and equipment, computers, systems, networks, hardware, software, websites, applications, and databases (collectively, “IT Systems”) are adequate for, and operate and perform in all material respects as required in connection with, the operation of the business of such Partnership Entity as currently conducted, free and clear of all material bugs, errors, defects, Trojan horses, time bombs, malware and other corruptants. Each Partnership Entity has implemented and maintained commercially reasonable controls, policies, procedures, and safeguards to maintain and protect its material confidential information and the integrity, continuous operation, redundancy and security of all IT Systems and data (including all personal, personally identifiable, sensitive, confidential or regulated data (“Personal Data”)) used in connection with its business, and there have been no breaches, violations, outages or unauthorized uses of or accesses to the same, except for those that (i) have been remedied without material cost or liability or the duty to notify any other person and (ii) those that will not individually or in the aggregate result in a Material Adverse Effect, nor any incidents under internal review or investigations relating to the same. Each Partnership Entity is presently in material compliance with all applicable laws or statutes and all judgments, orders, rules and regulations of any court or arbitrator or governmental or regulatory authority, internal policies and contractual obligations relating to the privacy and security of IT Systems and Personal Data and to the protection of such IT Systems and Personal Data from unauthorized use, access, misappropriation or modification.

Any certificate signed by any officer of the General Partner and delivered to the Representative or counsel for the Underwriters in connection with the offering of the Units shall be deemed a representation and warranty by the Partnership, as to matters covered thereby, to each Underwriter.

2. Purchase of the Units by the Underwriters. On the basis of the representations, warranties and covenants contained in, and subject to the terms and conditions of, this Agreement, the Partnership agrees to sell 9,500,000 Firm Units to the several Underwriters, and each of the Underwriters, severally and not jointly, agrees to purchase the number of Firm Units set forth opposite that Underwriter’s name in Schedule I hereto. The respective purchase obligations of the Underwriters with respect to the Firm Units shall be rounded among the Underwriters to avoid fractional Common Units, as the Representative may determine.

In addition, the Partnership grants to the Underwriters an option to purchase up to 1,425,000 additional Option Units. Each Underwriter agrees, severally and not jointly, to purchase the number of Option Units (subject to such adjustments to eliminate fractional Common Units as the Representative may determine) that bears the same proportion to the total number of Option Units to be sold on such Delivery Date as the number of Firm Units set forth in Schedule I hereto opposite the name of such Underwriter bears to the total number of Firm Units.

The purchase price payable by the Underwriters for the Firm Units and any Option Units is $31.20 per Unit.

The Partnership is not obligated to deliver any of the Firm Units or Option Units, as applicable, to be delivered on the applicable Delivery Date, except upon payment for all such Units to be purchased on such Delivery Date as provided herein.

3. Offering of Units by the Underwriters. Upon authorization by the Representative of the release of the Firm Units, the several Underwriters propose to offer the Firm Units for sale upon the terms and conditions to be set forth in the Prospectus.

4. Delivery of and Payment for the Units. Delivery of and payment for the Firm Units shall be made at 10:00 a.m., New York City time, on March 1, 2019 or at such other date or place as shall be determined by agreement between the Representative and the Partnership. This date and time are sometimes referred to as the “Initial Delivery Date.” Delivery of the Firm Units shall be made to the Representative for the account of each Underwriter against payment by the several Underwriters through the Representative of the respective aggregate purchase prices of the Firm Units being sold by the Partnership to or upon the order of the Partnership by wire transfer in immediately available funds to the accounts specified by the Partnership. Time shall be of the essence, and delivery at the time and place specified pursuant to this Agreement is a further condition of the obligation of each Underwriter hereunder. The Partnership shall deliver the Firm Units through the facilities of The Depository Trust Company (“DTC”) unless the Representative shall otherwise instruct.

The option granted in Section 2 will expire 30 days after the date of this Agreement and may be exercised in whole or from time to time in part by written notice being given to the Partnership by the Representative; provided that if such date falls on a day that is not a business day, the option granted in Section 2 will expire on the next succeeding business day. Such notice shall set forth the aggregate number of Option Units as to which the option is being exercised, the names in which the Option Units are to be registered, the denominations in which the Option Units are to be issued and the date and time, as determined by the Representative, when the Option Units are to be delivered; provided, however, that this date and time shall not be earlier than the Initial Delivery Date nor earlier than the second business day after the date on which the option shall have been exercised nor later than the fifth business day after the date on which the option shall have been exercised. Each date and time any Option Units are delivered is sometimes referred to as an “Option Units Delivery Date,” and the Initial Delivery Date and any Option Units Delivery Date are sometimes each referred to as a “Delivery Date.”

Delivery of the Option Units by the Partnership and payment for the Option Units by the several Underwriters through the Representative shall be made at 10:00 a.m., New York City time, on the date specified in the corresponding notice described in the preceding paragraph or at such other date or place as shall be determined by agreement between the Representative and the Partnership. On each Option Units Delivery Date, the Partnership shall deliver or cause to be delivered the Option Units to the Representative for the account of each Underwriter against payment by the several Underwriters through the Representative of the aggregate purchase price of the Option Units being sold by the Partnership to or upon the order of the Partnership by wire transfer in immediately available funds to the accounts specified by the Partnership. Time shall be of the essence, and delivery at the time and place specified pursuant to this Agreement is a further condition of the obligation of each Underwriter hereunder. The Partnership shall deliver the Option Units through the facilities of DTC unless the Representative shall otherwise instruct.

5. Further Agreements.

(a) The Partnership Entities jointly and severally covenant and agree with each of the Underwriters:

(i) To prepare the Prospectus in a form approved by the Representative and to file such Prospectus pursuant to Rule 424(b) under the Securities Act not later than the Commission’s close of business on the second business day following the execution and delivery of this Agreement; to make no further amendment or any supplement to the Registration Statement or the Prospectus prior to the last Delivery Date except as provided herein; to advise the Representative, promptly after it receives notice thereof, of the time when any amendment or supplement to the Registration Statement or the Prospectus has been filed and to furnish the Representative with copies thereof; to advise the Representative, promptly after it receives notice thereof, of the issuance by the Commission of any stop order or of any order preventing or suspending the use of the Prospectus or any Issuer Free Writing Prospectus, of the suspension of the qualification of the Units for offering or sale in any jurisdiction, of the initiation or threatening of any proceeding or examination for any such purpose or of any request by the Commission for the amending or supplementing of the Registration Statement, the Prospectus or any Issuer Free Writing Prospectus or for additional information; and, in the event of the issuance of any stop order or of any order preventing or suspending the use of the Prospectus or any Issuer Free Writing Prospectus or suspending any such qualification, to use promptly their best efforts to obtain its withdrawal.

(ii) To furnish promptly to the Representative and to counsel for the Underwriters a signed copy of the Registration Statement as originally filed with the Commission, and each amendment thereto filed with the Commission, including all consents and exhibits filed therewith.

(iii) To deliver promptly to the Representative such number of the following documents as the Representative shall reasonably request: (A) conformed copies of the Registration Statement as originally filed with the Commission and each amendment thereto (in each case excluding exhibits other than this Agreement), (B) each Preliminary Prospectus, the Prospectus and any amended or supplemented Prospectus, (C) each Issuer Free Writing Prospectus and (D) any document incorporated by reference in any Preliminary Prospectus or the Prospectus; and, if the delivery of a prospectus is required at any time after the date hereof in connection with the offering or sale of the Units or any other securities relating thereto and if at such time any event shall have occurred as a result of which the Prospectus as then amended or supplemented would include an untrue statement of a material fact or omit to state any material fact necessary in order to make the statements therein, in the light of the circumstances under which they were made when such Prospectus is delivered, not misleading, or, if for any other reason it shall be

necessary to amend or supplement the Prospectus in order to comply with the Securities Act, to notify the Representative and, upon request, to file such document and to prepare and furnish without charge to each Underwriter and to any dealer in securities as many copies as the Representative may from time to time reasonably request of an amended or supplemented Prospectus that will correct such statement or omission or effect such compliance.

(iv) To file promptly with the Commission any amendment or supplement to the Registration Statement or the Prospectus that may, in the judgment of the Partnership or the Representative, be required by the Securities Act or requested by the Commission.

(v) Prior to filing with the Commission any amendment or supplement to the Registration Statement, the Prospectus, any document incorporated by reference in the Prospectus or any amendment to any document incorporated by reference in the Prospectus, to furnish a copy thereof to the Representative and counsel for the Underwriters and obtain the consent of the Representative to the filing.

(vi) Not to make any offer relating to the Units that would constitute an Issuer Free Writing Prospectus without the prior written consent of the Representative.

(vii) To comply with all applicable requirements of Rule 433 under the Securities Act with respect to any Issuer Free Writing Prospectus. If at any time after the date hereof any event shall have occurred as a result of which any Issuer Free Writing Prospectus, as then amended or supplemented, would conflict with the information in the Registration Statement, the most recent Preliminary Prospectus or the Prospectus or would include an untrue statement of a material fact or omit to state any material fact necessary in order to make the statements therein, in the light of the circumstances under which they were made, not misleading, or, if for any other reason it shall be necessary to amend or supplement any Issuer Free Writing Prospectus, to notify the Representative and, upon request, to file such document and to prepare and furnish without charge to each Underwriter as many copies as the Representative may from time to time reasonably request of an amended or supplemented Issuer Free Writing Prospectus that will correct such conflict, statement or omission or effect such compliance.

(viii) As soon as practicable after the Effective Date (it being understood that the Partnership shall have until at least 405 days or, if the fourth quarter following the fiscal quarter that includes the Effective Date is the last fiscal quarter of the Partnership’s fiscal year, 440 days after the end of the Partnership’s current fiscal quarter), to make generally available to the Partnership’s security holders and to deliver to the Representative an earnings statement of the Partnership (which need not be audited) complying with Section 11(a) of the Securities Act and the rules and regulations thereunder (including, at the option of the Partnership, Rule 158).

(ix) Promptly from time to time to take such action as the Representative may reasonably request to qualify the Units for offering and sale under the securities or Blue Sky laws of such jurisdictions as the Representative may request and to comply with such laws so as to permit the continuance of sales and dealings therein in such jurisdictions for

as long as may be necessary to complete the distribution of the Units; provided that in connection therewith the Partnership shall not be required to (i) qualify as a foreign entity in any jurisdiction in which it would not otherwise be required to so qualify, (ii) file a general consent to service of process in any such jurisdiction, or (iii) subject itself to taxation in any jurisdiction in which it would not otherwise be subject.

(x) For a period commencing on the date hereof and ending on the 45th day after the date of the Prospectus (the “Lock-Up Period”), not to, directly or indirectly, (A) offer for sale, sell, pledge, or otherwise dispose of (or enter into any transaction or device that is designed to, or could be expected to, result in the disposition by any person at any time in the future of) any Common Units, Class B Units or securities convertible into or exercisable or exchangeable for Common Units or Class B Units (other than the Units or Common Units issued pursuant to employee benefit plans, qualified option plans or other employee compensation plans existing on the date hereof and any exchange or redemption at any time or from time to time by the Sponsor of any and all Class B Units and OpCo Units held by the Sponsor for Common Units), (B) enter into any swap or other derivatives transaction that transfers to another, in whole or in part, any of the economic benefits or risks of ownership of such Common Units or Class B Units, whether any such transaction described in clause (A) or (B) above is to be settled by delivery of Common Units, Class B Units or other securities, in cash or otherwise, (C) file or cause to be filed a registration statement, including any amendments thereto, with respect to the registration of any Common Units, Class B Units or securities convertible, exercisable or exchangeable into Common Units, Class B Units or any other securities of the Partnership (other than any registration statement on Form S-8), or (D) publicly disclose the intention to do any of the foregoing, in each case without the prior written consent of Credit Suisse Securities (USA) LLC, on behalf of the Underwriters, and to cause each officer and director of the General Partner and unitholder of the Partnership set forth on Schedule IV hereto to furnish to the Representative, on behalf of the Underwriters, prior to the Initial Delivery Date, a letter or letters, substantially in the form of Exhibit A hereto (the “Lock-Up Agreements”).

(xi) To apply the net proceeds from the sale of the Units being sold by the Partnership substantially in accordance with the description as set forth in the Prospectus under the caption “Use of Proceeds.”

(xii) If the Partnership elects to rely upon Rule 462(b) under the Securities Act, the Partnership shall file a Rule 462(b) Registration Statement with the Commission in compliance with Rule 462(b) under the Securities Act by 10:00 P.M., Washington, D.C. time, on the date of this Agreement, and the Partnership shall at the time of filing pay the Commission the filing fee for the Rule 462(b) Registration Statement.

(xiii) The Partnership and its affiliates will not take, directly or indirectly, any action designed to or that has constituted or that reasonably would be expected to cause or result in the stabilization or manipulation of the price of any security of the Partnership in connection with the offering of the Units.

(xiv) The Partnership will do and perform all things required or necessary to be done and performed under this Agreement by it prior to each Delivery Date, and to satisfy all conditions precedent to the Underwriters’ obligations hereunder to purchase the Units.

(b) Each Underwriter severally agrees that such Underwriter shall not include any “issuer information” (as defined in Rule 433 under the Securities Act) in any “free writing prospectus” (as defined in Rule 405 under the Securities Act) used or referred to by such Underwriter without the prior consent of the Partnership (any such issuer information with respect to whose use the Partnership has given its consent, “Permitted Issuer Information”); provided that (i) no such consent shall be required with respect to any such issuer information contained in any document filed by the Partnership with the Commission prior to the use of such free writing prospectus, and (ii) “issuer information,” as used in this Section 5(b), shall not be deemed to include information prepared by or on behalf of such Underwriter on the basis of or derived from issuer information.

6. Expenses. The Partnership agrees, whether or not the transactions contemplated by this Agreement are consummated or this Agreement is terminated, to pay all expenses, costs, fees and taxes incident to and in connection with (a) the authorization, issuance, sale and delivery of the Units and any stamp duties or other taxes payable in that connection, and the preparation and printing of certificates for the Units; (b) the preparation, printing and filing under the Securities Act of the Registration Statement (including any exhibits thereto), any Preliminary Prospectus, the Prospectus, any Issuer Free Writing Prospectus, any Written Testing-the-Waters Communication, and any amendment or supplement thereto; (c) the distribution of the Registration Statement (including any exhibits thereto), any Preliminary Prospectus, the Prospectus, any Issuer Free Writing Prospectus, any Written Testing-the-Waters Communication, and any amendment or supplement thereto, or any document incorporated by reference therein, all as provided in this Agreement; (d) the production and distribution of this Agreement, and any supplementary agreement among the Underwriters, and any other related documents in connection with the offering, purchase, sale and delivery of the Units; (e) any required review by FINRA of the terms of sale of the Units (including related fees and expenses of counsel to the Underwriters in an amount that is not greater than $20,000); (f) the inclusion of the Units on The Nasdaq Global Select Market; (g) the qualification of the Units under the securities laws of the several jurisdictions as provided in Section 5(a)(ix) and the preparation, printing and distribution of a Blue Sky Memorandum (including related fees and expenses of counsel to the Underwriters); (h) the preparation, printing and distribution of one or more versions of the Preliminary Prospectus and the Prospectus for distribution in Canada, including in the form of a Canadian “wrapper” (including related fees and expenses of Canadian counsel to the Underwriters); (i) the investor presentations on any “road show” or any Testing-the-Waters Communication, undertaken in connection with the marketing of the Units, including, without limitation, expenses associated with any electronic road show, travel and lodging expenses of the representatives and officers of the Partnership; provided, however, that the Underwriters will pay for 50% of the cost of any aircraft chartered in connection with the road show, except for flights on which there is no representative of the Representative; and (j) all other costs and expenses incident to the performance of the obligations of the Partnership under this Agreement; provided that, except as provided in this Section 6 and in Section 11, the Underwriters shall pay their own costs and expenses, including the costs and expenses of their counsel, any transfer taxes on the Units which they may sell, the expenses of advertising any offering of the Units made by the Underwriters and the transportation and other expenses incurred by the Underwriters on their own behalf in connection with presentations to prospective purchasers of the Units.

7. Conditions of Underwriters’ Obligations. The respective obligations of the Underwriters hereunder are subject to the accuracy, when made and on each Delivery Date, of the representations and warranties of the Partnership Entities contained herein, to the performance by the Partnership Entities of their respective obligations hereunder, and to each of the following additional terms and conditions:

(a) The Prospectus shall have been timely filed with the Commission in accordance with Section 5(a)(i). The Partnership shall have complied with all filing requirements applicable to any Issuer Free Writing Prospectus used or referred to after the date hereof; no stop order suspending the effectiveness of the Registration Statement or preventing or suspending the use of the Prospectus or any Issuer Free Writing Prospectus shall have been issued and no proceeding or examination for such purpose shall have been initiated or threatened by the Commission; and any request of the Commission for inclusion of additional information in the Registration Statement or the Prospectus or otherwise shall have been complied with. If the Partnership has elected to rely upon Rule 462(b) under the Securities Act, the Rule 462(b) Registration Statement shall have become effective by 10:00 p.m., Washington, D.C. time, on the date of this Agreement.

(b) No Underwriter shall have discovered and disclosed to the Partnership on or prior to such Delivery Date that the Registration Statement, the Prospectus or the Pricing Disclosure Package, or any amendment or supplement thereto, contains an untrue statement of a fact which, in the opinion of ▇▇▇▇▇▇ & ▇▇▇▇▇▇▇ LLP, counsel for the Underwriters, is material or omits to state a fact which, in the opinion of such counsel, is material and is required to be stated therein or is necessary to make the statements therein not misleading.

(c) All proceedings and other legal matters incident to the authorization, form and validity of this Agreement, the Units, the Registration Statement, the Prospectus and any Issuer Free Writing Prospectus, and all other legal matters relating to this Agreement and the transactions contemplated hereby shall be reasonably satisfactory in all material respects to counsel for the Underwriters, and the Partnership shall have furnished to such counsel all documents and information that they may reasonably request to enable them to pass upon such matters.

(d) Akin Gump ▇▇▇▇▇▇▇ ▇▇▇▇▇ & ▇▇▇▇ LLP shall have furnished to the Representative its written opinion, as counsel to the Partnership Entities, addressed to the Underwriters and dated such Delivery Date, in form and substance reasonably satisfactory to the Representative.

(e) P. ▇▇▇▇ ▇▇▇▇▇▇▇▇▇ shall have furnished to the Representative his written opinion, as general counsel to the General Partner, addressed to the Underwriters and dated such Delivery Date, in form and substance reasonably satisfactory to the Representative.

(f) The Representative shall have received from ▇▇▇▇▇▇ & ▇▇▇▇▇▇▇ LLP, counsel for the Underwriters, such opinion or opinions, dated such Delivery Date, with respect to the issuance and sale of the Units, the Registration Statement, the Prospectus and the Pricing Disclosure Package and other related matters as the Representative may reasonably require, and the Partnership Entities shall have furnished to such counsel such documents as they reasonably request for the purpose of enabling them to pass upon such matters.

(g) At the time of execution of this Agreement, the Representative shall have received from ▇▇▇▇▇ ▇▇▇▇▇▇▇▇ LLP a letter, in form and substance satisfactory to the Representative, addressed to the Underwriters and dated the date hereof (i) confirming that they are independent public accountants within the meaning of the Securities Act and are in compliance with the applicable requirements relating to the qualification of accountants under Rule 2-01 of Regulation S-X of the Commission, and (ii) stating, as of the date hereof (or, with respect to matters involving changes or developments since the respective dates as of which specified financial information is given in the most recent Preliminary Prospectus, as of a date not more than three days prior to the date hereof), the conclusions and findings of such firm with respect to the financial information and other matters ordinarily covered by accountants’ “comfort letters” to underwriters in connection with registered public offerings.

(h) With respect to the letter of ▇▇▇▇▇ ▇▇▇▇▇▇▇▇ LLP referred to in the preceding paragraph and delivered to the Representative concurrently with the execution of this Agreement (the “initial letter”), the Partnership shall have furnished to the Representative a letter (the “bring-down letter”) of such accountants, addressed to the Underwriters and dated such Delivery Date (i) confirming that they are independent public accountants within the meaning of the Securities Act and are in compliance with the applicable requirements relating to the qualification of accountants under Rule 2-01 of Regulation S-X of the Commission, (ii) stating, as of the date of the bring-down letter (or, with respect to matters involving changes or developments since the respective dates as of which specified financial information is given in the Prospectus, as of a date not more than three days prior to the date of the bring-down letter), the conclusions and findings of such firm with respect to the financial information and other matters covered by the initial letter, and (iii) confirming in all material respects the conclusions and findings set forth in the initial letter.

(i) The Representative shall have received from ▇▇▇▇▇ ▇▇▇▇▇ Company, L.P. a letter, addressed to the Underwriters dated such Delivery Date, in form and substance satisfactory to the Representative, confirming that, as of the date of its reserve report, it was an independent petroleum engineer with respect to the Partnership Entities, and as of the date of such letter, no information had come to its attention that could reasonably have been expected to cause it to withdraw its reserve report.

(j) The Partnership Entities shall have furnished to the Representative a certificate, dated such Delivery Date, of the Chief Executive Officer and the Chief Financial Officer of the General Partner as to such matters as the Representative may reasonably request, including, without limitation, a statement that:

(i) The representations, warranties and agreements of the Partnership Entities in Section 1 are true and correct on and as of such Delivery Date, and the Partnership has complied with all its agreements contained herein and satisfied all the conditions on its part to be performed or satisfied hereunder at or prior to such Delivery Date;

(ii) No stop order suspending the effectiveness of the Registration Statement has been issued; and no proceedings or examination for that purpose have been instituted or, to the knowledge of such officers, threatened; and the Commission shall not have notified the Company of any objection to the use of the form of the Registration Statement or any post-effective amendment thereto; and

(iii) They have examined the Registration Statement, the Prospectus and the Pricing Disclosure Package, and, in their opinion, (A) (1) the Registration Statement, as of the Effective Date, (2) the Prospectus, as of its date and on the applicable Delivery Date, and (3) the Pricing Disclosure Package, as of the Applicable Time, did not and do not contain any untrue statement of a material fact and did not and do not omit to state a material fact required to be stated therein or necessary to make the statements therein (except in the case of the Registration Statement, in the light of the circumstances under which they were made) not misleading, and (B) since the Effective Date, no event has occurred that should have been set forth in a supplement or amendment to the Registration Statement, the Prospectus or any Issuer Free Writing Prospectus that has not been so set forth.

(k) Except as described in the most recent Preliminary Prospectus, (i) none of the Partnership Entities shall have sustained, since the date of the latest audited financial statements included or incorporated by reference in the most recent Preliminary Prospectus, any loss or interference with its business from fire, explosion, flood or other calamity, whether or not covered by insurance, or from any labor dispute or court or governmental action, order or decree, or (ii) since such date there shall not have been any change in the equity interest or long-term debt of any of the Partnership Entities or any change, or any development involving a prospective change, in or affecting the condition (financial or otherwise), results of operations, partners’ or members’ equity, properties, management, business or prospects of the Partnership Entities taken as a whole, the effect of which, in any such case described in clause (i) or (ii), is, individually or in the aggregate, in the judgment of the Representative, so material and adverse as to make it impracticable or inadvisable to proceed with the public offering or the delivery of the Units being delivered on such Delivery Date on the terms and in the manner contemplated in the Prospectus.

(l) Subsequent to the execution and delivery of this Agreement, to the extent applicable, (i) no downgrading shall have occurred in the rating accorded the Partnership’s debt securities by any “nationally recognized statistical rating organization” (as defined by the Commission in Section 3(a)(62) of the Exchange Act), and (ii) no such organization shall have publicly announced that it has under surveillance or review, with possible negative implications, its rating of any of the Partnership’s debt securities.

(m) Subsequent to the execution and delivery of this Agreement there shall not have occurred any of the following: (i) (A) trading in securities generally on any securities exchange that has registered with the Commission under Section 6 of the Exchange Act (including the New York Stock Exchange, The Nasdaq Global Select Market, The Nasdaq Global Market or The Nasdaq Capital Market), or (B) trading in any securities of the Partnership on any exchange or in the over-the-counter market, shall have been suspended or materially limited or the settlement of such trading generally shall have been materially disrupted or minimum prices shall have been established on any such exchange or such market by the Commission, by such exchange or by any other regulatory body or governmental authority having jurisdiction, (ii) a general moratorium on commercial banking activities shall have been declared by federal or state authorities, (iii) the United States shall have become engaged in hostilities, there shall have been an escalation in hostilities involving the United States or there shall have been a declaration of a national emergency or war by the United States, or (iv) there shall have occurred such a material adverse change in general economic, political or financial conditions, including, without limitation, as a result of terrorist activities after the date hereof (or the effect of international conditions on the financial markets in the United States shall be such) or any other calamity or crisis either within or outside the United States, as to make it, in the judgment of the Representative, impracticable or inadvisable to proceed with the public offering or delivery of the Units being delivered on such Delivery Date on the terms and in the manner contemplated in the Prospectus.

(n) The Lock-Up Agreements between the Representative and the officers and directors of the General Partner and the unitholders of the Partnership set forth on Schedule IV, delivered to the Representative on or before the date of this Agreement, shall be in full force and effect on such Delivery Date.

(o) On or prior to each Delivery Date, the Partnership Entities shall have furnished to the Underwriters such further certificates and documents as the Representative may reasonably request.

All opinions, letters, evidence and certificates mentioned above or elsewhere in this Agreement shall be deemed to be in compliance with the provisions hereof only if they are in form and substance reasonably satisfactory to counsel for the Underwriters.

8. Indemnification and Contribution.

(a) The Partnership Entities hereby agree, jointly and severally, to indemnify and hold harmless each Underwriter, its affiliates, directors, officers and employees and each person, if any, who controls any Underwriter within the meaning of Section 15 of the Securities Act or Section 20 of the Exchange Act, from and against any loss, claim, damage or liability, joint or several, or any action in respect thereof (including, but not limited to, any loss, claim, damage, liability or action relating to purchases and sales of Units), to which that Underwriter, affiliate, director, officer, employee or controlling person may become subject, under the Securities Act or otherwise, insofar as such loss, claim, damage, liability or action arises out of, or is based upon, (i) any untrue statement or alleged untrue statement of a material fact contained in (A) any Preliminary Prospectus, the Registration Statement, the Prospectus or in any amendment or supplement thereto, (B) any Issuer Free Writing Prospectus or in any amendment or supplement thereto, (C) any Permitted Issuer Information used or referred to in any “free writing prospectus” (as defined in Rule 405 under the Securities Act) used or referred to by any Underwriter, (D) any materials or information provided to investors by, or with the approval of, the Partnership in connection with the marketing of the offering of the Units, including any “road show” (as defined in Rule 433 under the Securities Act) not constituting an Issuer Free Writing Prospectus and any Written Testing-the-Waters Communication (“Marketing Materials”), or (E) any Blue Sky application or other document prepared or executed by the Partnership (or based upon any written information furnished by the Partnership for use therein) specifically for the purpose of qualifying any or all of the Units under the securities laws of any state or other jurisdiction (any such application, document or information being hereinafter called a “Blue Sky Application”) or (ii) the omission or alleged omission to state in any Preliminary Prospectus, the Registration Statement, the Prospectus, any Issuer Free Writing Prospectus or in any amendment or supplement thereto or in any Permitted Issuer Information, any Marketing Materials or any Blue Sky Application, any material fact required to be stated therein or necessary to make the statements therein not misleading, and shall reimburse each Underwriter and each such affiliate, director, officer, employee or controlling person promptly upon demand for any legal or other expenses reasonably incurred by that Underwriter, affiliate, director, officer, employee or controlling person in connection with investigating or defending or preparing to defend against any such loss, claim, damage, liability or action as such expenses are incurred; provided, however, that none of the Partnership Entities shall be liable in any such case to the extent that any such loss, claim, damage, liability or action arises out of, or is based upon, any untrue statement or alleged untrue statement or omission or alleged omission made in any Preliminary Prospectus, the Registration Statement, the Prospectus, any Issuer Free Writing Prospectus or in any such amendment or supplement thereto or in any Permitted Issuer Information, any Marketing Materials or any Blue Sky Application, in reliance upon and in conformity with written information concerning such Underwriter furnished to the Partnership through the Representative by or on behalf of any Underwriter specifically for inclusion therein, which information consists solely of the information specified in Section 8(e). The foregoing indemnity agreement is in addition to any liability which the Partnership may otherwise have to any Underwriter or to any affiliate, director, officer, employee or controlling person of that Underwriter.

(b) Each Underwriter, severally and not jointly, shall indemnify and hold harmless each Partnership Entity, its directors, officers and employees, and each person, if any, who controls such Partnership Entity within the meaning of Section 15 of the Securities Act or Section 20 of the Exchange Act, from and against any loss, claim, damage or liability, joint or several, or any action in respect thereof, to which such Partnership Entity or any such director, officer, employee or controlling person may become subject, under the Securities Act or otherwise, insofar as such loss, claim, damage, liability or action arises out of, or is based upon, (i) any untrue statement or alleged untrue statement of a material fact contained in any Preliminary Prospectus, the Registration Statement, the Prospectus, any Issuer Free Writing Prospectus or in any amendment or supplement thereto or in any Marketing Materials or Blue Sky Application, or (ii) the omission or alleged omission to state in any Preliminary Prospectus, the Registration Statement, the Prospectus, any Issuer Free Writing Prospectus or in any amendment or supplement thereto or in any Marketing Materials or Blue Sky Application, any material fact required to be stated therein or necessary to make the statements therein not misleading, but in each case only to the extent that the untrue statement or alleged untrue statement or omission or alleged omission was made in reliance upon and in conformity with written information concerning such Underwriter furnished to the Partnership through the Representative by or on behalf of that Underwriter specifically for inclusion therein, which information is limited to the information set forth in Section 8(e). The foregoing indemnity agreement is in addition to any liability that any Underwriter may otherwise have to the Partnership or any such director, officer, employee or controlling person.

(c) Promptly after receipt by an indemnified party under this Section 8 of notice of any claim or the commencement of any action, the indemnified party shall, if a claim in respect thereof is to be made against the indemnifying party under this Section 8, notify the indemnifying party in writing of the claim or the commencement of that action; provided, however, that the failure to notify the indemnifying party shall not relieve it from any liability which it may have under this Section 8 except to the extent it has been materially prejudiced (through the forfeiture of substantive rights and defenses) by such failure and, provided, further, that the failure to notify the indemnifying party shall not relieve it from any liability which it may have to an indemnified party otherwise than under this Section 8. If any such claim or action shall be brought against an indemnified party, and it shall notify the indemnifying party thereof, the indemnifying party shall be entitled to participate therein and, to the extent that it wishes, jointly with any other similarly notified indemnifying party, to assume the defense thereof with counsel reasonably satisfactory to the indemnified party. After notice from the indemnifying party to the indemnified party of its election to assume the defense of such claim or action, the indemnifying party shall not be liable to the indemnified party under this Section 8 for any legal or other expenses subsequently incurred by the indemnified party in connection with the defense thereof other than reasonable costs of investigation; provided, however, that the indemnified party shall have the right to employ counsel to represent jointly the indemnified party and those other indemnified parties and their respective directors, officers, employees and controlling persons who may be subject to liability arising out of any claim in respect of which indemnity may be sought under this Section 8 if (i) the indemnified party and the indemnifying party shall have so mutually agreed; (ii) the indemnifying party has failed within a reasonable time to retain counsel reasonably satisfactory to the indemnified party; (iii) the indemnified party and its directors, officers, employees and controlling persons shall have reasonably concluded that there may be legal defenses available to them that are different from or in addition to

those available to the indemnifying party; or (iv) the named parties in any such proceeding (including any impleaded parties) include both the indemnified parties or their respective directors, officers, employees or controlling persons, on the one hand, and the indemnifying party, on the other hand, and representation of both sets of parties by the same counsel would be inappropriate due to actual or potential differing interests between them, and in any such event the fees and expenses of such separate counsel shall be paid by the indemnifying party. No indemnifying party shall (x) without the prior written consent of the indemnified parties (which consent shall not be unreasonably withheld), settle or compromise or consent to the entry of any judgment with respect to any pending or threatened claim, action, suit or proceeding in respect of which indemnification or contribution may be sought hereunder (whether or not the indemnified parties are actual or potential parties to such claim or action) unless such settlement, compromise or consent includes an unconditional release of each indemnified party from all liability arising out of such claim, action, suit or proceeding and does not include a statement as to, or an admission of fault, culpability or a failure to act by or on behalf of any indemnified party, or (y) be liable for any settlement of any such action effected without its written consent (which consent shall not be unreasonably withheld), but if settled with the consent of the indemnifying party or if there be a final judgment for the plaintiff in any such action, the indemnifying party agrees to indemnify and hold harmless any indemnified party from and against any loss or liability by reason of such settlement or judgment. Notwithstanding the foregoing sentence, if at any time an indemnified party shall have requested an indemnifying party to reimburse the indemnified party for fees and expenses of counsel as contemplated by Section 8(a) or (b) hereof, the indemnifying party agrees that it shall be liable for any settlement of any proceeding effected without its written consent if (i) such settlement is entered into more than 30 days after receipt by such indemnifying party of the aforesaid request and (ii) such indemnifying party shall not have reimbursed the indemnified party in accordance with such request or disputed in good faith the indemnified party’s entitlement to such reimbursement prior to the date of such settlement.

(d) If the indemnification provided for in this Section 8 shall for any reason be unavailable to or insufficient to hold harmless an indemnified party under Section 8(a), or 8(b) in respect of any loss, claim, damage or liability, or any action in respect thereof, referred to therein, then each indemnifying party shall, in lieu of indemnifying such indemnified party, contribute to the amount paid or payable by such indemnified party as a result of such loss, claim, damage or liability, or action in respect thereof, (i) in such proportion as shall be appropriate to reflect the relative benefits received by the Partnership Entities, on the one hand, and the Underwriters, on the other, from the offering of the Units, or (ii) if the allocation provided by clause (i) above is not permitted by applicable law, in such proportion as is appropriate to reflect not only the relative benefits referred to in clause (i) above but also the relative fault of the Partnership Entities, on the one hand, and the Underwriters, on the other, with respect to the statements or omissions that resulted in such loss, claim, damage or liability, or action in respect thereof, as well as any other relevant equitable considerations. The relative benefits received by the Partnership Entities, on the one hand, and the Underwriters, on the other, with respect to such offering shall be deemed to be in the same proportion as the total net proceeds from the offering of the Units purchased under this Agreement

(before deducting expenses) received by the Partnership Entities, as set forth in the table on the cover page of the Prospectus, on the one hand, and the total underwriting discounts and commissions received by the Underwriters with respect to the Units purchased under this Agreement, as set forth in the table on the cover page of the Prospectus, on the other hand. The relative fault shall be determined by reference to whether the untrue or alleged untrue statement of a material fact or omission or alleged omission to state a material fact relates to information supplied by the Partnership Entities or the Underwriters, the intent of the parties and their relative knowledge, access to information and opportunity to correct or prevent such statement or omission. The Partnership Entities and the Underwriters agree that it would not be just and equitable if contributions pursuant to this Section 8(d) were to be determined by pro rata allocation (even if the Underwriters were treated as one entity for such purpose) or by any other method of allocation that does not take into account the equitable considerations referred to herein. The amount paid or payable by an indemnified party as a result of the loss, claim, damage or liability, or action in respect thereof, referred to above in this Section 8(d) shall be deemed to include, for purposes of this Section 8(d), any legal or other expenses reasonably incurred by such indemnified party in connection with investigating or defending any such action or claim. Notwithstanding the provisions of this Section 8(d), in no event shall an Underwriter be required to contribute any amount in excess of the amount by which the total underwriting discounts and commissions received by such Underwriter with respect to the offering of the Units exceeds the amount of any damages that such Underwriter has otherwise been required to pay by reason of such untrue or alleged untrue statement or omission or alleged omission. No person guilty of fraudulent misrepresentation (within the meaning of Section 11(f) of the Securities Act) shall be entitled to contribution from any person who was not guilty of such fraudulent misrepresentation. The Underwriters’ obligations to contribute as provided in this Section 8(d) are several in proportion to their respective underwriting obligations and not joint.

(e) The Underwriters severally confirm and the Partnership Entities acknowledge and agree that (i) the information appearing in the twelfth paragraph and information relating to stabilization by the Underwriters appearing in the fourteenth and fifteenth paragraphs under the caption “Underwriting” in the most recent Preliminary Prospectus, and (ii) the concession figures appearing in the fourth paragraph under the caption “Underwriting,” the information appearing in the twelfth paragraph and information relating to stabilization by the Underwriters appearing in the fourteenth and fifteenth paragraphs under the caption “Underwriting” in the Prospectus are correct and constitute the only information concerning such Underwriters furnished in writing to the Partnership by or on behalf of the Underwriters specifically for inclusion in any Preliminary Prospectus, the Registration Statement, the Prospectus, any Issuer Free Writing Prospectus or in any amendment or supplement thereto or in any Marketing Materials.

9. Defaulting Underwriters.

(a) If, on any Delivery Date, any Underwriter defaults in its obligations to purchase the Units that it has agreed to purchase under this Agreement, the remaining non-defaulting Underwriters may in their discretion arrange for the purchase of such Units by the non-defaulting Underwriters or other persons satisfactory to the Partnership on the terms contained in this Agreement. If, within 36 hours after any such default by any Underwriter, the non-defaulting Underwriters do not arrange for the purchase of such Units, then the Partnership shall be entitled to a further period of 36 hours within which to procure other persons satisfactory to the non-defaulting Underwriters to purchase such Units on such terms. In the event that within the respective prescribed periods, the non-defaulting Underwriters notify the Partnership that they have so arranged for the purchase of such Units, or the Partnership notifies the non-defaulting Underwriters that it has so arranged for the purchase of such Units, either the non-defaulting Underwriters or the Partnership may postpone such Delivery Date for up to seven full business days in order to effect any changes that in the opinion of counsel for the Partnership or counsel for the Underwriters may be necessary in the Registration Statement, the Prospectus or in any other document or arrangement, and the Partnership agrees to promptly prepare any amendment or supplement to the Registration Statement, the Prospectus or in any such other document or arrangement that effects any such changes. As used in this Agreement, the term “Underwriter” includes, for all purposes of this Agreement unless the context requires otherwise, any party not listed in Schedule I hereto that, pursuant to this Section 9, purchases Units that a defaulting Underwriter agreed but failed to purchase.

(b) If, after giving effect to any arrangements for the purchase of the Units of a defaulting Underwriter or Underwriters by the non-defaulting Underwriters and the Partnership as provided in paragraph (a) above, the total number of the Units that remains unpurchased does not exceed one-eleventh of the total number of all the Units, then the Partnership shall have the right to require each non-defaulting Underwriter to purchase the total number of Units that such Underwriter agreed to purchase hereunder plus such Underwriter’s pro rata share (based on the total number of Units that such Underwriter agreed to purchase hereunder) of the Units of such defaulting Underwriter or Underwriters for which such arrangements have not been made; provided that the non-defaulting Underwriters shall not be obligated to purchase more than 110% of the total number of Units that it agreed to purchase on such Delivery Date pursuant to the terms of Section 2.

(c) If, after giving effect to any arrangements for the purchase of the Units of a defaulting Underwriter or Underwriters by the non-defaulting Underwriters and the Partnership as provided in paragraph (a) above, the total number of Units that remains unpurchased exceeds one-eleventh of the total number of all the Units, or if the Partnership shall not exercise the right described in paragraph (b) above, then this Agreement shall terminate without liability on the part of the non-defaulting Underwriters. Any termination of this Agreement pursuant to this Section 9 shall be without liability on the part of the Partnership, except that the Partnership will continue to be liable for the payment of expenses as set forth in Sections 6 and 11 and except that the provisions of Section 8 shall not terminate and shall remain in effect.

(d) Nothing contained herein shall relieve a defaulting Underwriter of any liability it may have to the Partnership or any non-defaulting Underwriter for damages caused by its default.

10. Termination. The obligations of the Underwriters hereunder may be terminated by the Representative by notice given to and received by the Partnership prior to delivery of and payment for the Firm Units if, prior to that time, any of the events described in Sections 7(l), 7(m) and 7(n) shall have occurred or if the Underwriters shall decline to purchase the Units for any reason permitted under this Agreement.

11. Reimbursement of Underwriters’ Expenses. If (a) the Partnership shall fail to tender the Units for delivery to the Underwriters for any reason other than by reason of a default by any of the Underwriters, or (b) the Underwriters shall decline to purchase the Units for any reason permitted under this Agreement (other than Section 7(n)(i)(A), (n)(ii), (n)(iii) or (n)(iv)), the Partnership will reimburse the Underwriters for all reasonable out-of-pocket expenses (including fees and disbursements of counsel for the Underwriters) incurred by the Underwriters in connection with this Agreement and the proposed purchase of the Units, and upon demand the Partnership shall pay the full amount thereof to the Representative. If this Agreement is terminated pursuant to Section 9 by reason of the default of one or more Underwriters, the Partnership shall not be obligated to reimburse any defaulting Underwriter on account of those expenses.

12. Research Analyst Independence. The Partnership acknowledges that the Underwriters’ research analysts and research departments are required to be independent from their respective investment banking divisions and are subject to certain regulations and internal policies, and that such Underwriters’ research analysts may hold views and make statements or investment recommendations and/or publish research reports with respect to the Partnership and/or the offering that differ from the views of their respective investment banking divisions. The Partnership Entities hereby waive and release, to the fullest extent permitted by law, any claims that the Partnership Entities may have against the Underwriters with respect to any conflict of interest that may arise from the fact that the views expressed by their independent research analysts and research departments may be different from or inconsistent with the views or advice communicated to the Partnership Entities by such Underwriters’ investment banking divisions. The Partnership Entities acknowledge that each of the Underwriters is a full service securities firm and as such from time to time, subject to applicable securities laws, may effect transactions for its own account or the account of its customers and hold long or short positions in debt or equity securities of the companies that may be the subject of the transactions contemplated by this Agreement.

13. No Fiduciary Duty. The Partnership Entities acknowledge and agree that in connection with this offering, sale of the Units or any other services the Underwriters may be deemed to be providing hereunder, notwithstanding any preexisting relationship, advisory or otherwise, between the parties or any oral representations or assurances previously or subsequently made by the Underwriters: (a) no fiduciary or agency relationship between the Partnership Entities and any other person, on the one hand, and the Underwriters, on the other, exists; (b) the Underwriters are not acting as advisors, expert or otherwise, to any of the Partnership Entities, including, without limitation, with respect to the determination of the public

offering price of the Units, and such relationship between the Partnership Entities, on the one hand, and the Underwriters, on the other, is entirely and solely commercial, based on arms-length negotiations; (c) any duties and obligations that the Underwriters may have to the Partnership Entities shall be limited to those duties and obligations specifically stated herein; and (d) the Underwriters and their respective affiliates may have interests that differ from those of the Partnership Entities. The Partnership Entities hereby waive any claims that any of the Partnership Entities may have against the Underwriters with respect to any breach of fiduciary duty in connection with this offering.

14. Notices, etc. All statements, requests, notices and agreements hereunder shall be in writing, and:

(a) if to the Underwriters, shall be delivered or sent by mail or facsimile transmission to Credit Suisse Securities (USA) LLC, Eleven ▇▇▇▇▇▇▇ ▇▇▇▇▇▇, ▇▇▇ ▇▇▇▇, ▇▇▇ ▇▇▇▇ ▇▇▇▇▇-▇▇▇▇, Attention: LCD-IBD; and

(b) if to any of the Partnership Entities, shall be delivered or sent by mail or facsimile transmission to the address of the Partnership set forth in the Registration Statement, Attention: P. ▇▇▇▇ ▇▇▇▇▇▇▇▇▇.

Any such statements, requests, notices or agreements shall take effect at the time of receipt thereof. The Partnership Entities shall be entitled to act and rely upon any request, consent, notice or agreement given or made by the Representative on behalf of the Underwriters.

15. Persons Entitled to Benefit of Agreement. This Agreement shall inure to the benefit of and be binding upon the Underwriters, the Partnership Entities and their respective successors. This Agreement and the terms and provisions hereof are for the sole benefit of only those persons, except that (a) the representations, warranties, indemnities and agreements of the Partnership Entities contained in this Agreement shall also be deemed to be for the benefit of the directors, officers and employees of the Underwriters and each person or persons, if any, who control any Underwriter within the meaning of Section 15 of the Securities Act, and (b) the indemnity agreement of the Underwriters contained in Section 8(b) of this Agreement shall be deemed to be for the benefit of the directors of the General Partner, the officers of the General Partner who have signed the Registration Statement and any person controlling the Partnership within the meaning of Section 15 of the Securities Act. Nothing in this Agreement is intended or shall be construed to give any person, other than the persons referred to in this Section 15, any legal or equitable right, remedy or claim under or in respect of this Agreement or any provision contained herein.

16. Survival. The respective indemnities, representations, warranties and agreements of the Partnership Entities and the Underwriters contained in this Agreement or made by or on behalf of them, respectively, pursuant to this Agreement, shall survive the delivery of and payment for the Units and shall remain in full force and effect, regardless of any investigation made by or on behalf of any of them or any person controlling any of them.

17. Definition of the Terms “Business Day”, “Affiliate” and “Subsidiary”. For purposes of this Agreement, (a) “business day” means each Monday, Tuesday, Wednesday, Thursday or Friday that is not a day on which banking institutions in New York are generally authorized or obligated by law or executive order to close, and (b) “affiliate” and “subsidiary” have the meanings set forth in Rule 405 under the Securities Act.

18. Governing Law. This Agreement shall be governed by and construed in accordance with the laws of the State of New York without regard to conflict of laws principles (other than Section 5-1401 of the General Obligations Law).

19. Waiver of Jury Trial. The Partnership Entities and the Underwriters hereby irrevocably waive, to the fullest extent permitted by applicable law, any and all right to trial by jury in any legal proceeding arising out of or relating to this Agreement or the transactions contemplated hereby.

20. Counterparts. This Agreement may be executed in one or more counterparts and, if executed in more than one counterpart, the executed counterparts shall each be deemed to be an original but all such counterparts shall together constitute one and the same instrument.

21. Patriot Act. In accordance with the requirements of the USA Patriot Act (Title III of Pub. L. 107-56 (signed into law October 26, 2001)), the Underwriters are required to obtain, verify and record information that identifies their respective clients, including the Partnership Entities, which information may include the name and address of their respective clients, as well as other information that will allow the Underwriters to properly identify their respective clients.

22. Headings. The headings herein are inserted for convenience of reference only and are not intended to be part of, or to affect the meaning or interpretation of, this Agreement.

If the foregoing correctly sets forth the agreement among the Partnership Entities and the Underwriters, please indicate your acceptance in the space provided for that purpose below.


		Very truly yours,

VIPER ENERGY PARTNERS LP

By:		Viper Energy Partners GP LLC
		its General Partner

By:		/s/ ▇▇▇▇ ▇▇▇▇▇▇▇▇▇
		Name: P. ▇▇▇▇ ▇▇▇▇▇▇▇▇▇
		Title: Executive Vice President, Secretary
		and General Counsel

VIPER ENERGY PARTNERS GP LLC

By:		/s/ ▇▇▇▇ ▇▇▇▇▇▇▇▇▇
		Name: P. ▇▇▇▇ ▇▇▇▇▇▇▇▇▇
		Title: Executive Vice President, Secretary
		and General Counsel

VIPER ENERGY PARTNERS LLC

By:		/s/ ▇▇▇▇ ▇▇▇▇▇▇▇▇▇
		Name: P. ▇▇▇▇ ▇▇▇▇▇▇▇▇▇
		Title: Executive Vice President, Secretary
		and General Counsel

[Signature Page to Underwriting Agreement]

Accepted:

CREDIT SUISSE SECURITIES (USA) LLC

For itself and as Representative

of the several Underwriters named

in Schedule I hereto

CREDIT SUISSE SECURITIES (USA) LLC


By:		/s/ Blake London
		Name: Blake London
		Title: Managing Director

[Signature Page to Underwriting Agreement]

SCHEDULE I


Underwriters	Number of Firm Units
Credit Suisse Securities (USA) LLC		2,850,000
▇▇▇▇▇▇▇ ▇▇▇▇▇ & Co. LLC		950,000
Citigroup Global Markets Inc.		950,000
▇▇▇▇▇ Fargo Securities, LLC		950,000
UBS Securities LLC		475,000
Barclays Capital Inc.		475,000
▇▇▇▇▇ ▇▇▇▇▇▇▇ & Co.		285,000
Tudor, Pickering, ▇▇▇▇ & Co. Securities, Inc.		285,000
SunTrust ▇▇▇▇▇▇▇▇ ▇▇▇▇▇▇▇▇, Inc.		285,000
Scotia Capital (USA) Inc.		285,000
▇▇▇▇▇▇▇ Lynch, Pierce, ▇▇▇▇▇▇ & ▇▇▇▇▇ Incorporated		285,000
▇▇▇▇▇▇▇ ▇▇▇▇▇ & Associates, Inc.		249,375
TD Securities (USA) LLC		249,375
▇▇▇▇▇▇, ▇▇▇▇▇▇▇▇ & Company, Incorporated		249,375
▇▇▇▇▇▇▇▇ Inc.		249,375
Imperial Capital, LLC		142,500
Northland Securities, Inc.		47,500
Capital One Securities, Inc.		47,500
PNC Capital Markets LLC		47,500
BBVA Securities Inc.		47,500
CIBC World Markets Corp.		47,500
Comerica Securities, Inc.		47,500

Total		9,500,000

SCHEDULE II

ORALLY CONVEYED PRICING INFORMATION

1. Public offering price: $32.00 per Common Unit

3. Number of units offered: 9,500,000 Firm Units or, if the Underwriters exercise in full their option to purchase additional Units granted in Section 2 hereof, 10,925,000 Units

SCHEDULE III

ISSUER FREE WRITING PROSPECTUSES

None.

SCHEDULE IV

PERSONS DELIVERING LOCK-UP AGREEMENTS

Directors

▇▇▇▇▇▇ ▇. ▇▇▇▇▇

▇▇▇▇▇▇ ▇. ▇▇▇▇

W. ▇▇▇▇▇▇ ▇▇▇▇▇

▇▇▇▇▇▇▇ ▇. ▇▇▇▇▇▇

▇▇▇▇▇ ▇. ▇▇▇▇▇

▇▇▇▇▇▇▇▇ ▇▇▇▇▇▇▇ ▇▇▇▇▇▇

▇▇▇▇▇▇▇ ▇. ▇▇▇▇▇▇, III

Officers

▇▇▇▇▇▇ ▇. ▇▇▇▇

▇▇▇▇▇▇▇ ▇▇▇▇▇▇▇▇▇▇▇

P. ▇▇▇▇ ▇▇▇▇▇▇▇▇▇

▇▇▇▇ Van’t Hof

▇▇▇▇▇▇ ▇. ▇▇▇▇▇▇▇

▇▇▇▇ ▇. ▇▇▇▇▇▇

Unitholders

Diamondback Energy, Inc.

EXHIBIT A

LOCK-UP LETTER AGREEMENT

CREDIT SUISSE SECURITIES (USA) LLC

As Representative of the several

Underwriters named in Schedule I

c/o Credit Suisse Securities (USA) LLC

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Ladies and Gentlemen:

The undersigned understands that you and certain other firms (the “Underwriters”) propose to enter into an Underwriting Agreement (the “Underwriting Agreement”) providing for the purchase by the Underwriters of common units (the “Units”) representing limited partner interests (“Common Units”), of Viper Energy Partners LP, a Delaware limited partnership (the “Partnership”), and that the Underwriters propose to reoffer the Units to the public (the “Offering”). Capitalized terms used but not defined herein shall have the meanings given to them in the Underwriting Agreement.

In consideration of the execution of the Underwriting Agreement by the Underwriters, and for other good and valuable consideration, the undersigned hereby irrevocably agrees that, without the prior written consent of Credit Suisse Securities (USA) LLC, on behalf of the Underwriters, the undersigned will not, directly or indirectly, (1) offer for sale, sell, pledge, or otherwise dispose of (or enter into any transaction or device that is designed to, or could be expected to, result in the disposition by any person at any time in the future of) any Common Units [or any Class B Units representing limited partner interests in the Partnership (the “Class B Units”)]¹ (including, without limitation, Common Units [and Class B Units] that may be deemed to be beneficially owned by the undersigned in accordance with the rules and regulations of the Securities and Exchange Commission and Common Units [and Class B Units] that may be issued upon exercise of any options or warrants) or securities convertible into or exercisable or exchangeable for Common Units [or Class B Units], (2) enter into any swap or other derivatives transaction that transfers to another, in whole or in part, any of the economic benefits or risks of ownership of Common Units [or Class B Units], whether any such transaction described in clause (1) or (2) above is to be settled by delivery of Common Units[, Class B Units] or other securities, in cash or otherwise, (3)

¹	Lock-up agreement of Diamondback Energy, Inc. to include Class B Units (as defined herein).

make any demand for or exercise any right or cause to be filed a registration statement, including any amendments thereto, with respect to the registration of any Common Units[, Class B Units] or securities convertible into or exercisable or exchangeable for Common Units[, Class B Units] or any other securities of the Partnership, or (4) publicly disclose the intention to do any of the foregoing for a period commencing on the date hereof and ending on the 45th day after the date of the Prospectus relating to the Offering (such 45-day period, the “Lock-Up Period”).

The foregoing paragraph shall not apply to (a) transactions relating to Common Units or other securities acquired in the open market after the completion of the Offering, (b) bona fide gifts, sales or other dispositions of any class of the Partnership’s units, in each case that are made exclusively between and among the undersigned or members of the undersigned’s family, or affiliates of the undersigned, including its partners (if a partnership) or members (if a limited liability company); provided that it shall be a condition to any transfer pursuant to this clause (b) that (i) the transferee/donee agrees to be bound by the terms of this Lock-Up Letter Agreement (including, without limitation, the restrictions set forth in the preceding sentence) to the same extent as if the transferee/donee were a party hereto, (ii) each party (donor, donee, transferor or transferee) shall not be required by law (including without limitation the disclosure requirements of the Securities Act, and the Exchange Act) to make, and shall agree to not voluntarily make, any filing or public announcement of the transfer or disposition prior to the expiration of the Lock-Up Period, and (iii) the undersigned notifies Credit Suisse Securities (USA) LLC at least two business days prior to the proposed transfer or disposition, (c) the exercise of warrants or the exercise of options granted pursuant to the Partnership’s option/incentive plans or otherwise outstanding on the date hereof; provided, that the restrictions shall apply to Common Units issued upon such exercise or conversion, (d) the establishment of any contract, instruction or plan that satisfies all of the requirements of Rule 10b5-1 (a “Rule 10b5-1 Plan”) under the Exchange Act; provided, however, that no sales of Common Units or securities convertible into, or exchangeable or exercisable for, Common Units, shall be made pursuant to any such Rule 10b5-1 Plan that is established on or after the date hereof, prior to the expiration of the Lock-Up Period (as the same may be extended pursuant to the provisions hereof); provided further, that the Partnership is not required to report the establishment of such Rule 10b5-1 Plan in any public report or filing with the Commission under the Exchange Act during the Lock-Up Period and does not otherwise voluntarily effect any such public filing or report regarding such Rule 10b5-1 Plan, (e) the sales of Common Units or securities convertible into, or exchangeable or exercisable for, Common Units, made pursuant to a Rule 10b5-1 that is in existence as of the date hereof, (f) in the case of the executive officers and directors of the General Partner, the right of such individuals to sell up to 75,000 Common Units per day in the aggregate during the Lock-Up Period, [(g) any exchange or redemption at any time or from time to time by the undersigned of any and all Class B Units and OpCo Units held by the undersigned for Common Units and any transfer by the undersigned of any such Common Units, Class B Units and/or OpCo Units to an affiliate of the undersigned; provided such affiliated entity agrees to be bound by the terms of this Lock-Up Letter Agreement with respect to any such Common ▇▇▇▇▇,

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Class B Units and/or OpCo Units to the same extent as if the entity was a party hereto,] ([g][h]) any demands or requests for, exercise any right with respect to, or take any action in preparation of, the registration by the Partnership under the Securities Act of the undersigned’s Common Units [(including any Common Units that may be received upon exchange or redemption of Class B Units for Common Units)], provided that no transfer of the undersigned’s Common Units registered pursuant to the exercise of any such right and no registration statement shall be filed under the Securities Act with respect to any of the undersigned’s Common Units during the Lock-Up Period and ([h][i]) assignments, transfers or other dispositions by any of the directors of the General Partner to Wexford Capital LP or an affiliate thereof of any class of the Partnership’s units or securities convertible into or exercisable or exchangeable for Common Units issued pursuant to employee benefit plans, qualified option plans or other employee compensation plans existing on the date hereof; provided that it shall be a condition to any transfer pursuant to this clause ([h][i]) that: (x) the transferee/assignee/donee agrees in writing to be bound by the terms of this Lock-Up Letter Agreement (including, without limitation, the restrictions set forth in the preceding sentence) to the same extent as if the transferee/assignee/donee were a party hereto but only with respect to the units or securities so transferred/assigned/donated and (y) such transfer/assignment/donation shall not involve any Form 4 filing or public announcement by any party (donor, donee, transferor or transferee) under the Exchange Act or otherwise unless such filing or announcement prominently discloses that the transfer/assignment/donation is a related party transfer and that the transferee/assignee/donee will be bound by the terms of the Lock-Up Letter Agreement with respect to the units or securities so transferred/assigned/donated as provided for in clause (x).

Notwithstanding anything to the contrary contained herein, the foregoing restrictions shall not apply to any Common Units or other securities of the Partnership held by Wexford Capital LP or any of its affiliated investment funds (together, “Wexford Affiliated Entities”) as of the date hereof or acquired by them on the open market during the Lock-Up Period, and this letter shall not restrict any sale, transfer or other disposition of such Common Units or other securities of the Partnership by the Wexford Affiliated Entities.

In furtherance of the foregoing, the Partnership and its transfer agent are hereby authorized to decline to make any transfer of securities if such transfer would constitute a violation or breach of this Lock-Up Letter Agreement.

It is understood that, if the Partnership notifies the Underwriters that it does not intend to proceed with the Offering, if the Underwriting Agreement does not become effective, or if the Underwriting Agreement (other than the provisions thereof which survive termination) shall terminate or be terminated prior to payment for and delivery of the Units, the undersigned will be released from its obligations under this Lock-Up Letter Agreement.

The undersigned understands that the Partnership and the Underwriters will proceed with the Offering in reliance on this Lock-Up Letter Agreement.

Whether or not the Offering actually occurs depends on a number of factors, including market conditions. Any Offering will only be made pursuant to an Underwriting Agreement, the terms of which are subject to negotiation between the Partnership and the Underwriters.

This Lock-Up Letter Agreement shall automatically terminate upon the termination of the Underwriting Agreement before the sale of any Units to the Underwriters.

[Signature page follows]

The undersigned hereby represents and warrants that the undersigned has full power and authority to enter into this Lock-Up Letter Agreement and that, upon request, the undersigned will execute any additional documents necessary in connection with the enforcement hereof. Any obligations of the undersigned shall be binding upon the heirs, personal representatives, successors and assigns of the undersigned.


Very truly yours,

By:
		Name:
		Title:

Dated: _______________

VIPER ENERGY PARTNERS LP 9,500,000 Common Units Representing Limited Partner Interests UNDERWRITING AGREEMENT

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