—] Shares PARSLEY ENERGY, INC. Class A common stock FORM OF UNDERWRITING AGREEMENT

Exhibit 1.1

[—] Shares

PARSLEY ENERGY, INC.

Class A common stock

FORM OF UNDERWRITING AGREEMENT

[—], 2014

CREDIT SUISSE SECURITIES (USA) LLC,

▇▇▇▇▇▇▇, ▇▇▇▇▇ & CO.

As Representatives of the Several Underwriters,

c/o Credit Suisse Securities (USA) LLC,

Eleven ▇▇▇▇▇▇▇ ▇▇▇▇▇▇,

▇▇▇ ▇▇▇▇, ▇▇▇ ▇▇▇▇ ▇▇▇▇▇-▇▇▇▇

c/o Goldman, Sachs & Co.

▇▇ ▇▇▇▇▇ ▇▇▇▇▇▇

▇▇▇ ▇▇▇▇, ▇▇▇ ▇▇▇▇ ▇▇▇▇▇

Dear Sirs:

1. Introductory. Parsley Energy, Inc., a Delaware corporation (“Company”) agrees with the several Underwriters named in Schedule A hereto (“Underwriters”) to issue and sell to the several Underwriters [—] shares of its Class A common stock (“Securities”) and the stockholders listed in Schedule B hereto (“Selling Stockholders”) agree severally with the Underwriters to sell to the several Underwriters an aggregate of [—] outstanding shares of the Securities (such [—] shares of Securities being hereinafter referred to as the “Firm Securities”). The Company also agrees to sell to the Underwriters, at the option of the Underwriters, an aggregate of not more than [—] additional shares of its Securities (“Optional Securities”), as set forth below. The Firm Securities and the Optional Securities are herein collectively called the “Offered Securities”. As part of the offering contemplated by this Agreement, [—] (the “Designated Underwriter”) has agreed to reserve out of the Firm Securities purchased by it under this Agreement, up to [—] shares, for sale to the Company’s directors, officers, employees and other parties associated with the Company (collectively, “Participants”), as set forth in the Final Prospectus (as defined herein) under the heading “Underwriting” (the “Directed Share Program”). The Firm Securities to be sold by the Designated Underwriter pursuant to the Directed Share Program (the “Directed Shares”) will be sold by the Designated Underwriter pursuant to this Agreement at the public offering price. Any Directed Shares not subscribed for by the end of the business day on which this Agreement is executed will be offered to the public by the Underwriters as set forth in the Final Prospectus.

The Company is a Delaware corporation that was formed for the purpose of making the proposed issuance and sale of the Offered Securities (the “Offering”). Upon consummation of the Offering contemplated by this Agreement, the Company will (i) contribute the net proceeds of the Offering to Parsley Energy, LLC, a Delaware limited liability company (“Parsley LLC”), in exchange for units of membership interest in Parsley LLC (the “PE Units”) and (ii) become the sole managing member of Parsley LLC. It is understood and agreed to by all parties that concurrently with, or prior

to, the closing of this Offering, Parsley LLC, will enter into certain corporate reorganization transactions (the “Reorganization Transactions”), pursuant to which the following transactions will occur:

A. The members of Parsley LLC (the “Existing Owners”) will convert their existing membership interests in Parsley LLC into PE Units and the Limited Liability Company Agreement of Parsley LLC will be amended and restated (as amended and restated, the “Parsley First Amended and Restated LLC Agreement”) to, among other things, (i) modify Parsley LLC’s capital structure to consist solely of PE Units and (ii) provide certain of the Existing Owners and their permitted transferees the right, subject to the terms of the Parsley First Amended and Restated LLC Agreement, to exchange their PE Units (together with a corresponding number of shares of Class B Common Stock of the Company) for Securities (or, at Parsley LLC’s option, for a cash payment) on a one-for-one basis, subject to certain adjustments.

B. In connection with the Reorganization Transactions, the certificate of incorporation of the Company will be amended and restated (as amended and restated, the “Company Restated Certificate of Incorporation”) and the bylaws of the Company will be amended and restated (as amended and restated, the “Company Restated Bylaws.”

C. Pursuant to that certain Master Reorganization Agreement, dated as of [—], 2014 (the “Master Reorganization Agreement”), by and among the Company, Parley LLC and the Existing Owners, certain of the Existing Owners will contribute all or a portion of the PE Units received by them in the Reorganization Transactions to the Company in exchange for Securities.

D. Pursuant to an Agreement and Plan of Merger, to be entered into on the Closing Date (the “Merger Agreement” and together with the Master Reorganization Agreement, the “Transaction Documents”), by and among Parsley Energy Employee Holdings, LLC, a Delaware limited liability company (“PEEH”) and the Company, PEEH will merge with and into the Company (the “Merger”), with the Company continuing as the surviving entity, and the members of PEEH will receive Securities in exchange for their interests in PEEH in the Merger.

2. Representations and Warranties of the Company and the Selling Stockholders. (a) The Company represents and warrants to, and agrees with, the several Underwriters that:

(i) Filing and Effectiveness of Registration Statement; Certain Defined Terms. The Company has filed with the Commission a registration statement on Form S-1 (No. 333-195230) covering the registration of the Offered Securities under the Act, including a related preliminary prospectus or prospectuses. At any particular time, this initial registration statement, in the form then on file with the Commission, including all information contained in the registration statement (if any) pursuant to Rule 462(b) and then deemed to be a part of the initial registration statement, and all 430A Information and all 430C Information, that in any case has not then been superseded or modified, shall be referred to as the “Initial Registration Statement”. The Company may also have filed, or may file with the Commission, a Rule 462(b) registration statement covering the registration of Offered Securities. At any particular time, this Rule 462(b) registration statement, in the form then on file with the Commission, including the contents of the Initial Registration Statement incorporated by reference therein and including all 430A Information and all 430C Information, that in any case has not then been superseded or modified, shall be referred to as the “Additional Registration Statement”.

As of the time of execution and delivery of this Agreement, the Initial Registration Statement has been declared effective under the Act and is not proposed to be amended. Any Additional Registration Statement has or will become effective upon filing with the Commission pursuant to Rule 462(b) and is not proposed to be amended. The Offered Securities all have been or will be registered under the Act pursuant to the Initial Registration Statement and, if applicable, the Additional Registration Statement.

For purposes of this Agreement:

“430A Information”, with respect to any registration statement, means information included in a prospectus and retroactively deemed to be a part of such registration statement pursuant to Rule 430A(b).

“430C Information”, with respect to any registration statement, means information included in a prospectus then deemed to be a part of such registration statement pursuant to Rule 430C.

“Act” means the Securities Act of 1933, as amended.

“Applicable Time” means [—][a/p]m (Eastern time) on the date of this Agreement.

“Closing Date” has the meaning defined in Section 3 hereof.

“Commission” means the Securities and Exchange Commission.

“Effective Time” with respect to the Initial Registration Statement or, if filed prior to the execution and delivery of this Agreement, the Additional Registration Statement, means the date and time as of which such Registration Statement was declared effective by the Commission or has become effective upon filing pursuant to Rule 462(c). If an Additional Registration Statement has not been filed prior to the execution and delivery of this Agreement but the Company has advised the Representatives that it proposes to file one, “Effective Time” with respect to such Additional Registration Statement means the date and time as of which such Registration Statement is filed and becomes effective pursuant to Rule 462(b).

“Exchange Act” means the Securities Exchange Act of 1934, as amended.

“Final Prospectus” means the Statutory Prospectus that discloses the public offering price, other 430A Information and other final terms of the Offered Securities and otherwise satisfies Section 10(a) of the Act.

“General Use Issuer Free Writing Prospectus” means any Issuer Free Writing Prospectus that is intended for general distribution to prospective investors, as evidenced by its being so specified in Schedule C to this Agreement.

“Issuer Free Writing Prospectus” means any “issuer free writing prospectus,” as defined in Rule 433, relating to the Offered Securities in the form filed or required to be filed with the Commission or, if not required to be filed, in the form retained in the Company’s records pursuant to Rule 433(g).

“Limited Use Issuer Free Writing Prospectus” means any Issuer Free Writing Prospectus that is not a General Use Issuer Free Writing Prospectus.

The Initial Registration Statement and the Additional Registration Statement are referred to collectively as the “Registration Statements” and each individually as a “Registration Statement”. A “Registration Statement” with reference to a particular time means the Initial Registration Statement and any Additional Registration Statement as of such time. A “Registration Statement” without reference to a time means such Registration Statement as of its Effective Time. For purposes of the foregoing definitions, 430A Information with respect to a Registration Statement shall be considered to be included in such Registration Statement as of the time specified in Rule 430A.

“Rules and Regulations” means the rules and regulations of the Commission.

“Statutory Prospectus” with reference to a particular time means the prospectus included in a Registration Statement immediately prior to that time, including any 430A Information or 430C Information with respect to such Registration Statement. For purposes of the foregoing

definition, 430A Information shall be considered to be included in the Statutory Prospectus as of the actual time that form of prospectus is filed with the Commission pursuant to Rule 424(b) or Rule 462(c) and not retroactively.

Unless otherwise specified, a reference to a “rule” is to the indicated rule under the Act.

(ii) Compliance with the Requirements of the Act. (i) (A) At their respective Effective Times and (B) on each Closing Date, each of the Initial Registration Statement and the Additional Registration Statement (if any) conformed and will conform in all material respects to the requirements of the Act and the Rules and Regulations, (ii) at their respective Effective Times, each of the Registration Statements did not and, as amended or supplemented, as applicable, will not, contain any untrue statement of a material fact or omit to state any material fact required to be stated therein or necessary to make the statements therein not misleading, (iii) on its date, at the time of filing of the Final Prospectus pursuant to Rule 424(b) or (if no such filing is required) at the Effective Time of the Additional Registration Statement in which the Final Prospectus is included, and on each Closing Date, the Final Prospectus will conform in all respects to the requirements of the Act and the Rules and Regulations and will not include any untrue statement of a material fact or omit to state any 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, and (iv) on the date of this Agreement, at their respective Effective Times or issue dates and on each Closing Date, each Registration Statement, the Final Prospectus, any Statutory Prospectus, any prospectus wrapper and any Issuer Free Writing Prospectus complied or comply, and such documents and any further amendments or supplements thereto will comply, with any applicable laws or regulations of foreign jurisdictions in which the Final Prospectus, any Statutory Prospectus, any prospectus wrapper or any Issuer Free Writing Prospectus, as amended or supplemented, if applicable, are distributed in connection with the Directed Share Program. The preceding sentence does not apply to statements in or omissions from any such document based upon written information furnished to the Company by any Underwriter through the Representatives specifically for use therein, it being understood and agreed that the only such information is that described as such in Section 8(c) hereof.

(iii) Ineligible Issuer Status. (i) At the time of the initial filing of the Initial Registration Statement and (ii) at the date of this Agreement, the Company was not and is not an “ineligible issuer,” as defined in Rule 405.

(iv) General Disclosure Package. As of the Applicable Time, neither (i) the General Use Issuer Free Writing Prospectus(es) issued at or prior to the Applicable Time, the preliminary prospectus, dated [—], 2014 (the “Preliminary Prospectus”) (which is the most recent Statutory Prospectus distributed to investors generally) and the other information, if any, stated in Schedule C to this Agreement to be included in the General Disclosure Package, all considered together (collectively, the “General Disclosure Package”), nor (ii) any individual Limited Use Issuer Free Writing Prospectus, when considered together with the General Disclosure Package, included any untrue statement of a material fact or omitted 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. The preceding sentence does not apply to statements in or omissions from any Statutory Prospectus or any Issuer Free Writing Prospectus in reliance upon and in conformity with written information furnished to the Company by any Underwriter through the Representatives specifically for use therein, it being understood and agreed that the only such information furnished by any Underwriter consists of the information described as such in Section 8(c) hereof.

(v) Issuer Free Writing Prospectuses. Each Issuer Free Writing Prospectus, as of its issue date and at all subsequent times through the completion of the public offer and sale of the Offered Securities or until any earlier date that the Company notified or notifies the Representatives as described in the next sentence, did not, does not and will not include any information that conflicted, conflicts or will conflict with the information then contained in the Registration Statement.

(vi) Good Standing of the Company. The Company has been duly incorporated and is existing and in good standing under the laws of the State of Delaware, with power and authority (corporate and other) to own its properties and conduct its business as described in the General Disclosure Package and the Final Prospectus; and the Company is duly qualified to do business as a foreign corporation 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 be duly qualified or in good standing would not, individually or in the aggregate, reasonably be expected to have a material adverse effect on the management, condition (financial or other), results of operations, business, properties or prospects of the Company and its subsidiaries taken as a whole (a “Material Adverse Effect”); all such jurisdictions are listed on Schedule D hereto.

(vii) Subsidiaries. After giving effect to the Reorganization Transactions, the Company will own [ ]% of the issued and outstanding PE Units and the entities listed on Schedule E hereto will be the only direct or indirect subsidiaries (as defined in Rule 1-02(w) of Regulation S-X) of the Company (references herein to “Subsidiaries” refer to the Company’s indirect and direct subsidiaries as listed on Schedule E after giving effect to the Reorganization Transactions). Each such subsidiary has been duly incorporated or formed and is existing and in good standing under the laws of the jurisdiction of its incorporation or formation, with corporate, limited liability company, limited partnership, and/or other similar power and authority to own its properties and conduct its business as described in the General Disclosure Package and the Final Prospectus; and each subsidiary listed on Schedule E hereto is duly qualified to do business as a foreign corporation or other entity 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 be duly qualified or in good standing would not, individually or in the aggregate, have a Material Adverse Effect; all such jurisdictions are listed on Schedule D hereto; all of the issued and outstanding capital stock or other ownership interests of each such Subsidiary has been duly authorized and validly issued and, in the case of any such corporation, is fully paid and nonassessable; and the capital stock or other ownership interests of each such Subsidiary owned by the Company, directly or indirectly, is owned free from liens, encumbrances and defects, other than those arising under (i) the Amended and Restated Credit Agreement, dated as of October 21, 2013, by and among Parsley Energy, L.P., as borrower, ▇▇▇▇▇ Fargo Bank, National Association, as administrative agent, JPMorgan Chase Bank, N.A., as syndication agent, BMO ▇▇▇▇▇▇ Bank, N.A., as documentation agent and the lenders party thereto, as heretofore amended, restated, modified or supplemented and (ii) the [Aircraft Term Note], or as otherwise would not individually or in the aggregate, reasonably be expected to have a Material Adverse Effect.

(viii) Offered Securities. The Offered Securities and all other outstanding shares of capital stock of the Company, after giving effect to the Reorganization Transactions, will have been duly authorized; after giving effect to the Reorganization Transactions, the authorized equity capitalization of the Company will be as set forth in the General Disclosure Package and the Final Prospectus under the heading “Capitalization”; after giving effect to the Reorganization Transactions, all outstanding shares of capital stock of the Company will be, and, when the Offered Securities have been delivered and paid for in accordance with this Agreement on each Closing Date, such Offered Securities will have been, validly issued, fully paid and nonassessable, and will conform to the information in the General Disclosure Package and to the description of such Offered Securities contained in the Final Prospectus in all material respects; the stockholders of the Company have no preemptive rights with respect to the Securities; and none of the outstanding shares of capital stock of the Company have been issued in violation of any preemptive or similar rights of any security holder. Except as disclosed in the Registration Statement, the General Disclosure Package and the Final Prospectus there are no outstanding (A) securities or obligations of the Company convertible

into or exchangeable for any capital stock of the Company, (B) warrants, rights or options to subscribe for or purchase from the Company any such capital stock or any such convertible or exchangeable securities or obligations or (C) obligations of the Company to issue or sell any shares of capital stock, any such convertible or exchangeable securities or obligations or any such warrants, rights or options. The Company has not, directly or indirectly, offered or sold any of the Offered Securities by means of any “prospectus” (within the meaning of the Act and the Rules and Regulations) or used any “prospectus” or made any offer (within the meaning of the Act and the Rules and Regulations) in connection with the offer or sale of the Offered Securities, in each case other than through any Preliminary Prospectus, the Final Prospectus, any Permitted Free Writing Prospectus, and in connection with the Directed Share Program, the enrollment materials prepared by the Designated Underwriter on behalf of the Company.

(ix) No Finder’s Fee. Except as disclosed in the General Disclosure Package and the Final Prospectus, there are no contracts, agreements or understandings between the Company and any person that would give rise to a valid claim against the Company or any Underwriter for a brokerage commission, finder’s fee or other like payment in connection with this offering.

(x) Registration Rights. Except as disclosed in the General Disclosure Package and the Final Prospectus and as set forth in that certain Registration Rights Agreement, dated as of June 11, 2013, by and among the Company, NGP X US Holdings, L.P., and the other parties thereto, there are no contracts, agreements or understandings between the Company and any person granting such person the right to require the Company to file a registration statement under the Act with respect to any securities of the Company owned or to be owned by such person or to require the Company to include such securities in the securities registered pursuant to a Registration Statement or in any securities being registered pursuant to any other registration statement filed by the Company under the Act. (collectively, “registration rights”), and any person to whom the Company has granted registration rights has agreed not to exercise such rights until after the expiration of the Lock-Up Period referred to in Section 5(l) hereof.

(xi) Listing. The Offered Securities have been approved for listing on The New York Stock Exchange, subject to official notice of issuance.

(xii) Absence of Further Requirements. No consent, approval, authorization, or order of, or filing or registration with, any person (including any governmental agency or body or any court) is required to be obtained or made by the Company for the consummation of the transactions contemplated by this Agreement in connection with the sale of the Offered Securities, except (i) such as have been obtained, (ii) where the failure of the Company to obtain or make any such consent, approval, authorization, order, filing or registration would not reasonably be expected to have a Material Adverse Effect, or (iii) such as have been made or as may be required under state or foreign securities or “Blue Sky” laws or by the Financial Industry Regulatory Authority (“FINRA”).

(xiii) Title to Property. Except as disclosed in the General Disclosure Package and the Final Prospectus, after giving effect to the Reorganization Transactions, the Company and its Subsidiaries will have (i) good and defensible title to all of the interests in oil and gas properties underlying the Company’s estimates of its net proved reserves contained in the General Disclosure Package and the Final Prospectus and (ii) good and marketable title to all other real and personal property reflected in the General Disclosure Package and the Final Prospectus as assets owned by them, in each case free and clear of all liens, encumbrances and defects except such as (w) are described in the General Disclosure Package and the Final Prospectus, (x) are liens and encumbrances under operating agreements, unitization and pooling agreements, production sales contracts, farmout agreements and other oil and gas exploration, participation and production agreements, in each case that secure payment of amounts not yet due and payable for the performance of other unmatured obligations and are

of a scope and nature customary in the oil and gas industry or arise in connection with drilling and production operations, or (y) do not materially affect the value of the properties of the Company and its Subsidiaries and do not interfere in any material respect with the use made or proposed to be made of such properties by the Company or its Subsidiaries; any other real property and buildings held under lease by the Company and its Subsidiaries are held by them under valid, subsisting and enforceable leases, with such exceptions as are not material and do not interfere in any material respect with the use made and proposed to be made of such property and buildings by the Company or its Subsidiaries; and the working interests derived from oil, gas and mineral leases or mineral interests that constitute a portion of the real property held or leased by the Company and its Subsidiaries reflect in all material respects the rights of the Company and its Subsidiaries to explore, develop or produce hydrocarbons from such real property in the manner contemplated by the General Disclosure Package and the Final Prospectus, and the care taken by the Company and its Subsidiaries with respect to acquiring or otherwise procuring such leases or other property interests was generally consistent with standard industry practices in the areas in which the Company and its Subsidiaries operate for acquiring or procuring leases and interests therein to explore, develop or produce hydrocarbons. With respect to interests in oil and gas properties obtained by or on behalf of the Company and its Subsidiaries that have not yet been drilled or included in a unit for drilling, the Company and its Subsidiaries have carried out such title investigations in accordance with the customary practice in the oil and gas industry in the areas in which the Company and its Subsidiaries operate.

(xiv) Rights-of-Way. After giving effect to the Reorganization Transactions, the Company and its Subsidiaries will have such consents, easements, rights-of-way or licenses from any person (collectively, “rights-of-way”) as are necessary to enable the Company to conduct its business in the manner described in the General Disclosure Package and the Final Prospectus, subject to qualifications as may be set forth in the General Disclosure Package and the Final Prospectus, except where failure to have such rights-of-way would not reasonably be expected to have, individually or in the aggregate, a Material Adverse Effect.

(xv) Status of Oil and Gas Leases. As of the date hereof, (i) all royalties, rentals, deposits and other amounts owed under the oil and gas leases constituting the oil and gas properties of the Company and its Subsidiaries have been properly and timely paid (other than amounts held in suspense accounts pending routine payments or related to disputes about the proper identification of royalty owners and except where the failure to timely pay or pay such amounts would not reasonably be expected to have a Material Adverse Effect); and no material amount of proceeds from the sale or production attributable to the oil and gas properties of the Company and its Subsidiaries are currently being held in suspense by any purchaser thereof, except where such amounts due would not reasonably be expected to have a Material Adverse Effect, and (ii) there are no claims under take-or-pay contracts pursuant to which natural gas purchasers have any make-up rights affecting the interests of the Companies or its Subsidiaries in their respective oil and gas properties, except where such claims would not reasonably be expected to have a Material Adverse Effect.

(xvi) Reserve Engineers. Netherland, ▇▇▇▇▇▇ & Associates, Inc., the reserve engineer that prepared a reserve report on estimated net proved oil and natural gas reserves held by the Company and its Subsidiaries as of December 31, 2013 have represented to the Company that they are an independent petroleum engineer with respect to the Company and its Subsidiaries for the periods set forth in the General Disclosure Package and the Final Prospectus.

(xvii) Reserve Report Information. The information contained in the General Disclosure Package and the Final Prospectus regarding estimated proved reserves of the Company and its Subsidiaries is based upon the reserve reports prepared by Netherland, ▇▇▇▇▇▇ & Associates, Inc. The information provided to Netherland, ▇▇▇▇▇▇ & Associates, Inc., by the Company and its Subsidiaries, 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 the reports were made. Such information was provided to Netherland, ▇▇▇▇▇▇ & Associates, Inc., in accordance with all customary industry practices.

(xviii) Reserve Reports; Production Estimates. The factual information underlying the estimates of reserves of the Company and its Subsidiaries included in the General Disclosure Package and the Final Prospectus, including, without limitation, 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 such estimates were made and such information was supplied and was prepared in accordance with customary industry practices. 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 factors, in each case in the ordinary course of business, and except as described in the General Disclosure Package and the Final Prospectus, neither of the Company nor any of its Subsidiaries is aware of any facts or circumstances that would result in a material adverse change in the aggregate net reserves, or the aggregate present value of future net cash flows therefrom, as described in the General Disclosure Package and the Final Prospectus.

(xix) Absence of Defaults and Conflicts Resulting from Transaction. The execution, delivery and performance of this Agreement and the Transaction Documents, the issuance and sale of the Offered Securities and the application of the net proceeds therefrom as set forth in the General Disclosure Package and the Final Prospectus will not result in a breach or violation of any of the terms and provisions of, or constitute, or with the giving of notice or lapse of time, would constitute, a default under, or result in the imposition of any lien, charge or encumbrance upon any property or assets of the Company or any of its Subsidiaries pursuant to, (i) their respective certificate of formation, limited liability company agreement, limited partnership agreement, charter, or by-laws or similar organizational documents of the Company or any of its Subsidiaries, (ii) any statute, rule, regulation or order of any governmental agency or body or any court, domestic or foreign, having jurisdiction over the Company or any of its Subsidiaries or any of their properties, or (iii) any agreement or instrument to which the Company or any of its Subsidiaries is a party or by which the Company or any of its Subsidiaries is bound or to which any of the properties of the Company or any of its Subsidiaries is subject, except in the case of clauses (ii) and (iii) as would not reasonably be expected to have a Material Adverse Effect.

(xx) Absence of Existing Defaults and Conflicts. Neither the Company nor any of its Subsidiaries is (i) in violation of its respective certificate of formation, limited liability company agreement, limited partnership agreement, charter, by-laws or similar organizational documents, (ii) 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) in violation of any law or statute or any judgment, order, rule or regulation of any court or arbitrator or governmental or regulatory authority, except, in the case of clauses (ii) and (iii) above, for any such default or violation that would not reasonably be expected to have a Material Adverse Effect.

(xxi) Authorization of Agreement. This Agreement has been duly authorized, executed and delivered by the Company.

(xxii) Possession of Licenses and Permits. After giving effect to the Reorganization Transactions, the Company and its Subsidiaries will possess all 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 in the

manner described in the General Disclosure Package and the Final Prospectus to be conducted by them, except where the failure to have obtained the same would not reasonably be expected to have a Material Adverse Effect. After giving effect to the Reorganization Transactions, the Company and its Subsidiaries will be in compliance with the terms and conditions of all such Licenses, except where the failure to so comply would not, individually or in the aggregate, reasonably be expected to have 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 the Company or any of its Subsidiaries, would, individually or in the aggregate, reasonably be expected to have a Material Adverse Effect.

(xxiii) Absence of Labor Dispute. No labor dispute with the employees of the Company or any of its Subsidiaries exists or, to the knowledge of the Company, is imminent that would reasonably be expected to have a Material Adverse Effect or except as described in the General Disclosure Package and the Final Prospectus.

(xxiv) Possession of Intellectual Property. The Company and its subsidiaries own, possess or can acquire on reasonable terms, adequate trademarks, trade names and other rights to inventions, know-how, patents, copyrights, confidential information and other intellectual property (collectively, “intellectual property rights”) necessary to conduct the business now operated by them, or presently employed by them, and have not received any notice of infringement of or conflict with asserted rights of others with respect to any intellectual property rights that, if determined adversely to the Company or any of its subsidiaries, would individually or in the aggregate have a Material Adverse Effect.

(xxv) Environmental Laws. Except as disclosed in the General Disclosure Package and the Final Prospectus, (a)(i) neither the Company nor any of its Subsidiaries 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”) that would, individually or in the aggregate, reasonably be expected to have a Material Adverse Effect, (ii) to the knowledge of the Company, neither the Company nor any of its Subsidiaries own, occupy, operate or use any real property contaminated with Hazardous Substances, (iii) neither the Company nor any of its Subsidiaries 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 Company, neither the Company nor any of its Subsidiaries is liable or allegedly liable for any release or threatened release of Hazardous Substances, including at any off site storage, treatment, or disposal site, (v) neither the Company nor any of its Subsidiaries is subject to any pending, or to the Company’s knowledge, threatened, claim by any governmental agency or governmental body or person arising under Environmental Laws or relating to the release of or exposure to Hazardous Substances, and (vi) the Company and its Subsidiaries have received, 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, reasonably be expected to have a Material Adverse Effect; (b) to the knowledge of the Company and its Subsidiaries, 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 reasonably be expected to have a Material Adverse Effect; and (c) in the ordinary course of its business, each of the Company and its Subsidiaries periodically evaluate the effect, including associated costs and liabilities, of Environmental Laws on the business, properties, results of operations and financial condition of the Company and its Subsidiaries, and, on the basis of such evaluation, the Company and its Subsidiaries

have reasonably concluded that such Environmental Laws are not, individually or in the aggregate, reasonably expected to have 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, and polychlorinated biphenyls, 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.

(xxvi) Accurate Disclosure. The statements in the General Disclosure Package and the Final Prospectus under the headings “Certain Relationships and Related Party Transactions,” “Description of Capital Stock,” “Business—Legal Proceedings,” “Business—Regulation of the Oil and Natural Gas Industry”, “Business—Regulation of Environmental and Occupational Safety and Health Matters”, and “Material U.S. Federal Income and Estate Tax Consequences to Non-U.S. Holders”, in each case to the extent that they constitute matters of law or summaries of legal matters, any other instruments, agreements, or documents, summaries of legal or regulatory proceedings, or legal conclusions are correct in all material respects. There are no contracts or documents which are required to be described in the Registration Statement or the Preliminary Prospectus pursuant to Form S-1 or to be filed as exhibits to the Registration Statement pursuant to Item 601 of Regulation S-K which have not been so described or filed as required, except for where the failure to describe or file such exhibits would not have a Material Adverse Effect.

(xxvii) Absence of Manipulation. The Company has not 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 Company to facilitate the sale or resale of the Offered Securities.

(xxviii) Statistical and Market-Related Data. Any third-party statistical and market-related data included in a Registration Statement, a Statutory Prospectus, or the General Disclosure Package or the Final Prospectus are based on or derived from sources that the Company believes to be reliable and accurate.

(xxix) Internal Controls and Compliance with the ▇▇▇▇▇▇▇▇-▇▇▇▇▇ Act. There is and has been no failure on the part of the Company and any of the Company’s directors or officers, in their capacities as such, to comply with any provision of the ▇▇▇▇▇▇▇▇-▇▇▇▇▇ Act of 2002, as amended, and the rules and regulations promulgated in connection therewith applicable to the Company. The Company maintains a system of internal controls, including, but not limited to, disclosure controls and procedures, internal controls over accounting matters and financial reporting, an internal audit function and legal and regulatory compliance controls that 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. Since the date of the most recent balance sheet of the Company and its Subsidiaries reviewed or audited by KPMG LLP, (i) the Company has not been advised of or become aware of (A) any significant deficiencies in the design or operation of internal controls that could adversely affect the ability of the Company or any of its Subsidiaries to record, process, summarize and report financial data, or any material weaknesses in internal controls, and (B) any fraud, whether or not material, that involves management or other employees who have a significant role in the internal controls of the Company and each of its Subsidiaries; and (ii) there have been no significant changes in internal controls or in other factors that could significantly affect internal controls, including any corrective actions with regard to significant deficiencies and material weaknesses.

(xxx) Litigation. Except as disclosed in the General Disclosure Package and the Final Prospectus, 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 Company, any of its Subsidiaries or any of their respective properties that, if determined adversely to the Company or any of its Subsidiaries, would, individually or in the aggregate, reasonably be expected to have a Material Adverse Effect, or would materially and adversely affect the ability of the Company to perform its obligations under this Agreement; and no such actions, suits or proceedings (including any inquiries or investigations by any court or governmental agency or body, domestic or foreign) are threatened or, to the Company’s knowledge, contemplated.

(xxxi) Financial Statements. The historical financial statements included in each Registration Statement, the General Disclosure Package and the Final Prospectus present fairly in all material respects the financial position of the Company and its consolidated Subsidiaries as of the dates shown and their results of operations and cash flows of the Company and its Subsidiaries for the periods shown. Except as disclosed in the General Disclosure Package and the Final Prospectus, such financial statements comply as to form in all material respects with the applicable accounting requirements of Regulation S-X and have been prepared in all material respects in conformity with GAAP applied on a consistent basis throughout the periods involved except as otherwise stated therein. The unaudited pro forma financial statements and the related notes thereto included under the heading “Pro Forma Consolidated and Combined Financial Statements” in the Preliminary Prospectus present fairly in all material respects the information contained therein and have been properly presented on the bases described therein, and the assumptions used in the preparation thereof are reasonable and the adjustment used therein are appropriate to give effect to the transactions and circumstances referred to therein. The pro forma adjustments comply as to form in all material respects with the applicable accounting requirements of Rule 11-02 of Regulation S-X under the Securities Act and the pro forma adjustments have been properly applied to the historical amounts in the compilation of those statements. KPMG LLP has certified the audited financial statements of the Company included in the Registration Statement, General Disclosure Package and the Final Prospectus, and is an independent registered public accounting firm with respect to the Company and its Subsidiaries within the Rules and Regulations and as required by the Act and the applicable rules and guidance from the Public Company Accounting Oversight Board (United States). The other financial and statistical data included in the Registration Statement, the General Disclosure Package and the Final Prospectus under the captions “Summary Historical and Pro Forma Consolidated and Combined Financial Data and “Selected Historical and Pro Forma Consolidated and Combined Financial Data” 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 Company. The Company does 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 General Disclosure Package and the Final Prospectus.

(xxxii) No Material Adverse Change in Business. Except as disclosed in the General Disclosure Package and the Final Prospectus, since the end of the period covered by the latest audited financial statements included in the General Disclosure Package and the Final Prospectus (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 Company and its Subsidiaries, 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 Company on any class of its capital stock, (iii) there has been no material adverse change in the capital stock, short-term indebtedness, long-term indebtedness, net current assets or net assets of the Company or any of its Subsidiaries, (iv) there has been no obligation, direct or

contingent, that is material to the Company or any of its Subsidiaries taken as a whole, incurred by the Company or any of its Subsidiaries, except obligations incurred in the ordinary course of business and (v) neither the Company nor any of its Subsidiaries has sustained any material loss or interference with its business from fire, explosion, flood or other calamity, whether or not covered by insurance, or from any labor disturbance or dispute or any action, order or decree of any court or arbitrator or governmental or regulatory authority.

(xxxiii) Investment Company Act. The Company is not and, after giving effect to the offering and sale of the Offered Securities and the application of the proceeds thereof as described in the General Disclosure Package and the Final Prospectus, will not be an “investment company” as defined in the Investment Company Act of 1940 (the “Investment Company Act”).

(xxxiv) Ratings. No “nationally recognized statistical rating organization” as such term is defined for purposes of Section 3(a)(62) of the Exchange Act has imposed (or has informed the Company or any of its Subsidiaries that it is considering imposing) any condition (financial or otherwise) on the Company’s or any of its Subsidiaries’ retaining any rating assigned to the Company or any of its Subsidiaries or any securities of the Company or any of its Subsidiaries or (ii) has indicated to the Company or any of its Subsidiaries that it is considering any of the actions described in Section 7(d)(ii) hereof.

(xxxv) Absence of Unlawful Influence. The Company has not offered or sold, or caused the Underwriters to offer or sell, any Offered Securities to any person pursuant to the Directed Share Program with the specific intent to unlawfully influence (i) a customer or supplier of the Company to alter the customer’s or supplier’s level or type of business with the Company or (ii) a trade journalist or publication to write or publish favorable information about the Company or its products.

(xxxvi) Insurance. Except as disclosed in the Registration Statement, the General Disclosure Package and the Final Prospectus, the Company and its Subsidiaries are insured by insurers of recognized financial responsibility against such losses and risks and in such amounts as the Company reasonably believes are adequate for the conduct of their business. All such policies of insurance insuring the Company and its Subsidiaries are in full force and effect. The Company and its Subsidiaries are in compliance with the terms of such policies and instruments in all material respects; and there are no material claims by the Company or its Subsidiaries under any such policy or instrument as to which any insurance company is denying liability or defending under a reservation of rights clause. Neither the Company nor any of its Subsidiaries 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 be expected to have a Material Adverse Effect, except as disclosed in the Registration Statement, the General Disclosure Package and the Final Prospectus.

(xxxvii) Tax Returns. The Company and its Subsidiaries 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 have a Material Adverse Effect); and, except as set forth in the General Disclosure Package and the Final Prospectus, the Company and its Subsidiaries 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, individually or in the aggregate, reasonably be expected to have a Material Adverse Effect.

(xxxviii) Certain Relationships and Related Party Transactions. No relationship, direct or indirect, exists between or among the Company or its Subsidiaries on the one hand, and the directors, officers, stockholders, customers or suppliers of the Company or its Subsidiaries on the other hand, which is required to be described in the General Disclosure Package which is not so described therein. The Final Prospectus will contain the same description of the matters set forth in the preceding sentence contained in the General Disclosure Package.

(xxxix) No Unlawful Payments. None of the Company or any of its Subsidiaries, or to the knowledge of the Company and its Subsidiaries, any of its or their respective directors, officers, agents, employees or other persons associated with or acting on behalf of the Company or any of its Subsidiaries has (A) used any corporate funds for any unlawful contribution, gift, entertainment or other unlawful expense relating to political activity; (B) made any direct or indirect unlawful payment to any foreign or domestic government official or employee from corporate funds; (C) violated or is in violation of any provision of the Foreign Corrupt Practices Act of 1977; or (D) made any bribe, rebate, payoff, influence payment, kickback or other unlawful payment.

(xl) Compliance with Anti-Money Laundering Laws. The operations of the Company and its Subsidiaries 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 applicable money laundering statutes of all jurisdictions where the Company or any of its Subsidiaries conducts business, the rules and regulations thereunder and any related or similar rules, regulations or guidelines issued, administered or enforced by any governmental or regulatory agency (collectively, the “Anti-Money Laundering Laws”) and no action, suit or proceeding by or before any court or governmental or regulatory agency, authority or body or any arbitrator involving the Company or any of its Subsidiaries with respect to the Anti-Money Laundering Laws is pending or, to the knowledge of the Company and the Subsidiaries, threatened.

(xli) Compliance with OFAC. None of the Company or any of its Subsidiaries, or to the knowledge of the Company and its Subsidiaries, any of the directors, officers, agents, employees or affiliates of the Company or any of its Subsidiaries is currently subject to any U.S. sanctions administered by the Office of Foreign Assets Control of the U.S. Department of the Treasury (“OFAC”); and none of the Company or any of its Subsidiaries will, directly or indirectly, use the proceeds of the offering and sale of its Offered Securities under this Agreement, or lend, contribute or otherwise make available such proceeds to any subsidiary, joint venture partner or other person or entity, for the purpose of financing the activities of any person currently subject to any U.S. sanctions administered by OFAC.

(xlii) Emerging Growth Company. The Company is an emerging growth company as defined in Section 2(a)(19) of the Act. Neither the Company nor any person authorized by the Company has engaged in any oral or written communication in connection with the offering of the Offered Securities in reliance on Section 5(d) of the Act.

(b) Each Selling Stockholder severally and not jointly represents and warrants to, and agrees with, the several Underwriters that:

(i) Title to Securities. Upon completion of the Reorganization Transactions, and immediately prior to any Closing Date on which such Selling Stockholder is selling the Offered Securities, such Selling Stockholder will have good and marketable title to the Offered Securities to be sold by such Selling Stockholder hereunder on such Closing Date, free and clear of all liens, encumbrances, equities, community property rights, restrictions on transfer or claims except for any liens, encumbrances, equities or claims arising under the Custody Agreement (defined below).

(ii) Valid Security Entitlement. Upon payment for the Offered Securities to be sold by such Selling Stockholder pursuant to this Agreement, delivery of such Offered Securities, as directed by the Underwriters, to Cede & Co. (“Cede”) or such other nominee as may be designated by The Depository Trust Company (“DTC”), registration of such Offered Securities in the name of Cede or such other nominee and the crediting of such Offered Securities on the books of

DTC to securities accounts of the Underwriters (i) DTC will acquire good and marketable title to the Offered Securities free and clear of all liens, encumbrances, equities, community property rights, restrictions on transfer or claims, (ii) DTC shall be a “protected purchaser” of such Offered Securities within the meaning of Section 8-303 of the New York Uniform Commercial Code (the “UCC”), (iii) under Section 8-501 of the UCC, the Underwriters will acquire a valid security entitlement in respect of such Offered Securities, and (iv) an action based on an “adverse claim” (within the meaning of Sections 8-102 and 8-105 of the UCC) to such securities entitlement, whether framed in conversion, replevin, constructive trust, equitable lien or other theory may not be asserted against the Underwriters with respect to such security entitlement (assuming that the Underwriters are purchasing such Offered Securities without notice of any adverse claim). For purposes of this representation, such Selling Stockholder may assume that when such payment, delivery and crediting occur, (x) such Offered Securities will have been registered in the name of Cede or another nominee designated by DTC, in each case on the Company’s share registry in accordance with its certificate of incorporation, bylaws and applicable law, (y) DTC will be registered as a “clearing corporation” within the meaning of Section 8-102 of the UCC, and (z) appropriate entries to the accounts of the several Underwriters on the records of DTC will have been made pursuant to the UCC.

(iii) Custody Agreement. Such Selling Stockholder will, prior to the First Closing Date, place in custody under a custody agreement (the “Custody Agreement” and, together with all other similar agreements executed by the other Selling Stockholders, the “Custody Agreements”) with American Stock Transfer & Trust Company, LLC, as custodian (the “Custodian”), for delivery under this Agreement, certificates in negotiable form (with signature guaranteed by a participant in the Securities Transfer Agents Medallion Program, the New York Stock Exchange Medallion Signature Program or the Stock Exchanges Medallion Program) representing the Offered Securities to be sold by the Selling Stockholder hereunder.

(iv) Power of Attorney. Such Selling Stockholder has duly and irrevocably executed and delivered a power of attorney (the “Power of Attorney” and, together with all other similar agreements executed by the other Selling Stockholders, the “Powers of Attorney”) appointing the Custodian and ▇▇▇▇▇ ▇▇▇▇▇▇▇ and ▇▇▇▇ ▇▇▇▇▇▇ as attorneys in fact, with full power of substitution, and with full authority (exercisable by any one or more of them) to execute and deliver this Agreement and to take such other action as may be necessary or desirable to carry out the provisions hereof on behalf of the Selling Stockholder.

(v) Absence of Further Requirements. No consent, approval, authorization or order of, or filing with, any person (including any governmental agency or body or any court) is required to be obtained or made by any Selling Stockholder for the consummation of the transactions contemplated by the Custody Agreement or this Agreement in connection with the offering and sale of the Offered Securities sold by the Selling Stockholders, except (A) such as have been or, prior to the First Closing Date will be, obtained or made, (B) for the registration of the Offered Securities under the Act and such consents, approvals, authorizations, orders, filings, registrations or qualifications as may be required under the Exchange Act and applicable state securities laws in connection with the purchase and sale of the Offered Securities by the Underwriters, (C) for such that, if not obtained, have not or would not, in the aggregate, reasonably be expected to have a material adverse effect on the ability of the Selling Stockholders to consummate the transactions contemplated by this Agreement, the Custody Agreement or the Power of Attorney, and (D) as described in the Registration Statement and the most recent Preliminary Prospectus.

(vi) Absence of Defaults and Conflicts Resulting from Transaction. The execution, delivery and performance of the Custody Agreement and this Agreement and the consummation of the transactions therein and herein contemplated will not result in a breach or violation of (i) 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 any Selling Stockholder pursuant to, any statute, any rule, regulation or order of any governmental agency or body or any court having jurisdiction over

any Selling Stockholder or any of their properties or any agreement or instrument to which any Selling Stockholder is a party or by which any Selling Stockholder is bound or to which any of the properties of any Selling Stockholder is subject except for any breach or violation that would not, individually or in the aggregate, materially impair the Selling Stockholder’s ability to consummate the transactions contemplated by this Agreement, the Custody Agreement or the Power of Attorney, or (ii) the charter or by-laws of any Selling Stockholder that is a corporation or the constituent documents of any Selling Stockholder that is not a natural person or a corporation.

(vii) Authority. Such Selling Stockholder has full right, power and authority, corporate or otherwise, to enter into this Agreement, the Custody Agreement and the Power of Attorney.

(viii) Compliance with Securities Act Requirements.

(a) The representations in Section 2(b)(viii)(b) are limited to any statements or omissions made in the Registration Statement, the Preliminary Prospectus, the Final Prospectus or any amendment or supplement thereto or any Issuer Free Writing Prospectus that are made in reliance upon and in conformity with written information furnished to the Company by such Selling Stockholder expressly for use therein, it being understood and agreed that the only such information furnished by such Selling Stockholder consists of (A) the legal name, address and the number of Securities owned by such Selling Stockholder upon completion of the Reorganization Transactions, (B) the other information with respect to such Selling Stockholder (excluding percentages) which appear in the table (and corresponding footnotes) under the caption “Principal and Selling Shareholders” and (C) information with respect to such Selling Stockholder under the description of the Reorganization Transactions (with respect to such Selling Stockholder, the “Selling Stockholder Information”)

(b) (i) (A) At their respective Effective Times, and (B) on each Closing Date, each of the Initial Registration Statement and the Additional Registration Statement (if any) conformed and will conform in all respects to the requirements of the Act and the Rules and Regulations, (ii) at their respective Effective Times, each of the Registration Statements, did not and as amended or supplemented, as applicable, will not contain any untrue statement of a material fact or omit to state any material fact required to be stated therein or necessary to make the statements therein not misleading, (iii) on its date, at the time of filing of the Final Prospectus pursuant to Rule 424(b) or (if no such filing is required) at the Effective Time of the Additional Registration Statement in which the Final Prospectus is included, and on each Closing Date, the Final Prospectus will conform in all respects to the requirements of the Act and the Rules and Regulations and will not include any untrue statement of a material fact or omit to state any material fact required to be stated therein or necessary to make the statements therein, in light of the circumstances under which they were made, not misleading.

(ix) No Undisclosed Material Information. The sale of the Offered Securities by such Selling Stockholder pursuant to this Agreement is not prompted by any material information concerning the Company or any of its Subsidiaries that is not set forth the General Disclosure Package and the Final Prospectus.

(x) Authorization of Agreement. This Agreement has been duly authorized, executed and delivered by each Selling Stockholder.

(xi) Absence of Manipulation. Such Selling Stockholder has not 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 Company to facilitate the sale or resale of the Offered Securities.

3. Purchase, Sale and Delivery of Offered Securities. On the basis of the representations, warranties and agreements and subject to the terms and conditions set forth herein, the Company and each Selling Stockholder agree, severally and not jointly, to sell to each Underwriter, and each Underwriter agrees, severally and not jointly, to purchase from the Company and each Selling Stockholder, at a purchase price of $[—] per share, that number of Firm Securities (rounded up or down, as determined by the Representatives in their discretion, in order to avoid fractions) obtained by multiplying [—] Firm Securities in the case of the Company and the number of Firm Securities set forth opposite the name of such Selling Stockholder in Schedule B hereto, in the case of a Selling Stockholder, in each case by a fraction the numerator of which is the number of Firm Securities set forth opposite the name of such Underwriter in Schedule A hereto and the denominator of which is the total number of Firm Securities.

Certificates in book-entry form for the Offered Securities to be sold by the Selling Stockholders hereunder have been placed in custody, for delivery under this Agreement, under Custody Agreements made with American Stock Transfer & Trust Company, LLC, as custodian (“Custodian”). Each Selling Stockholder agrees that the shares represented by the certificates held in custody for the Selling Stockholders under such Custody Agreements are subject to the interests of the Underwriters hereunder, that the arrangements made by the Selling Stockholders for such custody are to that extent irrevocable, and that the obligations of the Selling Stockholders hereunder shall not be terminated by operation of law, whether by the death of any individual Selling Stockholder or the occurrence of any other event, or in the case of a trust, by the death of any trustee or trustees or the termination of such trust. If any individual Selling Stockholder or any such trustee or trustees should die, or if any other such event should occur, or if any of such trusts should terminate, before the delivery of the Offered Securities hereunder, such Offered Securities shall be delivered by the Custodian in accordance with the terms and conditions of this Agreement as if such death or other event or termination had not occurred, regardless of whether or not the Custodian shall have received notice of such death or other event or termination.

The Company and the Custodian will deliver the Firm Securities to or as instructed by the Representatives for the accounts of the several Underwriters in a form reasonably acceptable to the Representatives against payment of the purchase price in Federal (same day) funds by official bank check or checks or wire transfer to an account at a bank acceptable to the Representatives drawn to the order of the Company in the case of [—] shares of Firm Securities and [—] in the case of [—] shares of Firm Securities, at the office of ▇▇▇▇▇▇ & ▇▇▇▇▇▇▇ LLP, ▇▇▇ ▇▇▇▇ ▇▇▇▇▇▇, ▇▇▇▇▇ ▇▇▇▇, ▇▇▇▇▇▇▇, ▇▇▇▇▇ ▇▇▇▇▇, at [9:00] am (Eastern Time), on [—] 2014, or at such other time not later than seven full business days thereafter as the Representatives and the Company determine, such time being herein referred to as the “First Closing Date”. For purposes of Rule 15c6-1 under the Securities Exchange Act of 1934, the First Closing Date (if later than the otherwise applicable settlement date) shall be the settlement date for payment of funds and delivery of securities for all the Offered Securities sold pursuant to the offering. Delivery of the Firm Securities will be made through the facilities of the Depositary Trust Company (the “DTC”) unless the Representatives shall otherwise instruct.

In addition, upon written notice from the Representatives given to the Company from time to time not more than 30 days subsequent to the date of the Final Prospectus, the Underwriters may purchase all or less than all of the Optional Securities at the purchase price per Security to be paid for the Firm Securities. Such notice shall set forth (i) the aggregate number of shares of Optional Securities to be sold by the Company as to which the Underwriters are exercising the option and (ii) the time, date and place at which the Optional Securities will be delivered (each time for the delivery of and payment for the Optional Securities being herein referred to as an “Optional Closing Date,” which may be the First Closing Date) (the First Closing Date and each Optional Closing Date, if any, being sometimes referred to as a “Closing Date”). The Company agrees to sell to the Underwriters the number of Optional Securities specified in such notice and the Underwriters agree, severally and not jointly, to purchase such Optional Securities. Such Optional Securities shall be purchased for the account of each Underwriter in the same proportion as the number of Firm Securities set forth opposite such Underwriter’s name bears to the total number of Firm Securities (subject to adjustment by the Representatives to eliminate fractions) and may be purchased by the Underwriters only for the purpose

of covering over-allotments made in connection with the sale of the Firm Securities. No Optional Securities shall be sold or delivered unless the Firm Securities previously have been, or simultaneously are, sold and delivered. The right to purchase the Optional Securities or any portion thereof may be exercised from time to time and to the extent not previously exercised may be surrendered and terminated at any time upon notice by the Representatives to the Company and the Selling Stockholders.

Each Optional Closing Date shall be determined by the Representatives but shall be not later than five full business days after written notice of election to purchase Optional Securities is given. The Company will deliver the Optional Securities being purchased on each Optional Closing Date to or as instructed by the Representatives for the accounts of the several Underwriters in a form reasonably acceptable to the Representatives, against payment of the purchase price therefor in Federal (same day) funds by official bank check or checks or wire transfer to an account at a bank acceptable to the Representatives drawn to the order of the Company, at the above office of ▇▇▇▇▇▇ & ▇▇▇▇▇▇▇ LLP. The delivery of any Optional Securities will be made through the facilities of the DTC unless the Representatives shall otherwise instruct.

4. Offering by Underwriters. It is understood that the several Underwriters propose to offer the Offered Securities for sale to the public as set forth in the Final Prospectus.

5. Certain Agreements of the Company and the Selling Stockholders. The Company agrees with the several Underwriters and the Selling Stockholders that:

(a) Additional Filings. The Company will file the Final Prospectus, in a form approved by the Representatives, with the Commission pursuant to and in accordance with subparagraph (1) (or, if applicable and if consented to by the Representatives, subparagraph (4)) of Rule 424(b) not later than the earlier of (A) the second business day following the execution and delivery of this Agreement or (B) the fifteenth business day after the Effective Time of the Initial Registration Statement. The Company will advise the Representatives promptly of any such filing pursuant to Rule 424(b) and provide satisfactory evidence to the Representatives of such timely filing. If an Additional Registration Statement is necessary to register a portion of the Offered Securities under the Act but the Effective Time thereof has not occurred as of the execution and delivery of this Agreement, the Company will file the additional registration statement or, if filed, will file a post-effective amendment thereto with the Commission pursuant to and in accordance with Rule 462(b) on or prior to 10:00 P.M., New York time, on the date of this Agreement or, if earlier, on or prior to the time the Final Prospectus is finalized and distributed to any Underwriter, or will make such filing at such later date as shall have been consented to by the Representatives.

(b) Filing of Amendments: Response to Commission Requests. The Company will promptly advise the Representatives of any proposal to amend or supplement at any time the Initial Registration Statement, any Additional Registration Statement or any Statutory Prospectus and will not effect such amendment or supplementation without the Representatives’ consent; and the Company will also advise the Representatives promptly of (i) the effectiveness of any Additional Registration Statement (if its Effective Time is subsequent to the execution and delivery of this Agreement), (ii) any amendment or supplementation of a Registration Statement or any Statutory Prospectus, (iii) any request by the Commission or its staff for any amendment to any Registration Statement, for any supplement to any Statutory Prospectus or for any additional information, (iv) the institution by the Commission of any stop order proceedings in respect of a Registration Statement or the threatening of any proceeding for that purpose, and (v) the receipt by the Company of any notification with respect to the suspension of the qualification of the Offered Securities in any jurisdiction or the institution or threatening of any proceedings for such purpose. The Company will use its reasonable best efforts to prevent the issuance of any such stop order or the suspension of any such qualification and, if issued, to obtain as soon as possible the withdrawal thereof.

(c) Continued Compliance with Securities Laws. If, at any time when a prospectus relating to the Offered Securities is (or but for the exemption in Rule 172 would be) required to be delivered under the Act by any Underwriter or dealer, any event occurs as a result of which the Final Prospectus as then amended or supplemented would include an untrue statement of a material fact or omit to state any material fact necessary to make the statements therein, in the light of the circumstances under which they were made, not misleading, or if it is necessary at any time to amend the Registration Statement or supplement the Final Prospectus to comply with the Act, the Company will promptly notify the Representatives of such event and will promptly prepare and file with the Commission and furnish, at its own expense, to the Underwriters and the dealers and any other dealers upon request of the Representatives, an amendment or supplement which will correct such statement or omission or an amendment which will effect such compliance. Neither the Representatives’ consent to, nor the Underwriters’ delivery of, any such amendment or supplement shall constitute a waiver of any of the conditions set forth in Section 7 hereof.

(d) Rule 158. As soon as practicable, but not later than the Availability Date (as defined below), the Company will make generally available to its security holders an earnings statement covering a period of at least 12 months beginning after the Effective Date of the Initial Registration Statement (or, if later, the Effective Time of the Additional Registration Statement) which will satisfy the provisions of Section 11(a) of the Act and Rule 158 under the Act. For the purpose of the preceding sentence, “Availability Date” means the day after the end of the fourth fiscal quarter following the fiscal quarter that includes such Effective Time on which the Company is required to file its Form 10-Q for such fiscal quarter except that, if such fourth fiscal quarter is the last quarter of the Company’s fiscal year, “Availability Date” means the day after the end of such fourth fiscal quarter on which the Company is required to file its Form 10-K.

(e) Furnishing of Prospectuses. The Company will furnish to the Representatives copies of each Registration Statement (three of which will be signed and will include all exhibits), each related Statutory Prospectus, and, so long as a prospectus relating to the Offered Securities is (or but for the exemption in Rule 172 would be) required to be delivered under the Act, the Final Prospectus and all amendments and supplements to such documents, in each case in such quantities as [the Representatives request. The Final Prospectus shall be so furnished within two business days following the execution and delivery of this agreement, unless otherwise agreed by the Company and the Representatives. All other such documents shall be so furnished as soon as available, unless otherwise agreed by the Company and the Representatives.

(f) Blue Sky Qualifications. The Company shall cooperate with the Underwriters and counsel for the Underwriters to qualify or register the Offered Securities for resale under (or obtain exemptions from the application of) the state securities or Blue Sky laws of those jurisdictions designated by the Underwriters, shall comply with such laws and shall continue such qualifications, registrations and exemptions in effect so long as required for the distribution of the Offered Securities. Notwithstanding the foregoing, the Company shall not be required to qualify as a foreign corporation or to take any action that would subject it to general service of process or taxation in any such jurisdiction where it is not presently qualified or subject to taxation.

(g) Reporting Requirements. During the period of five years hereafter, the Company will furnish to the Representatives and, upon request, to each of the other Underwriters, as soon as practicable after the end of each fiscal year, a copy of its annual report to stockholders for such year; and the Company will furnish to the Representatives (i) as soon as available, a copy of each report and any definitive proxy statement of the Company filed with the Commission under the Exchange Act or mailed to stockholders, and (ii) from time to time, such other information concerning the Company as the Representatives may reasonably request. However, so long as the Company is subject to the reporting requirements of either Section 13 or Section

15(d) of the Exchange Act and is timely filing reports with the Commission on its Electronic Data Gathering, Analysis and Retrieval system (“▇▇▇▇▇”), it is not required to furnish such reports or statements to the Underwriters.

(h) Payment of Expenses. The Company agrees with the several Underwriters that the Company will pay all expenses incident to the performance of the obligations of the Company and the Selling Stockholders, as the case may be, under this Agreement, including but not limited to (i) any filing fees and reasonable attorneys’ fees and expenses incurred by the Company, the Selling Stockholders or the Underwriters in connection with qualifying or registering (or obtaining exemptions from the qualification or registration of) all or any part of the Offered Securities for offer and sale under the state securities or Blue Sky laws of such jurisdictions as the Representatives designate and the preparation and printing of memoranda relating thereto, (ii) the filing fees incident to, and the reasonable fees and expenses of counsel for the Underwriters up to $[—], in connection with the FINRA’s review and approval of the Underwriters’ participation in the offering and distribution of the Offered Securities, (iii) fees and expenses incident to listing the Offered Securities on the New York Stock Exchange, (iv) fees and expenses in connection with the registration of the Offered Securities under the Exchange Act, (v) any transfer taxes on the sale by the Selling Stockholders of the Offered Securities to the Underwriters, (vi) expenses incurred in distributing preliminary prospectuses, the Final Prospectus (including any amendments and supplements thereto) and the Registration Statement and exhibits thereto to the Underwriters and expenses incurred for preparing, printing and distributing any Issuer Free Writing Prospectuses to investors or prospective investors and (vii) all other fees, costs and expenses referred to in Item 13 of Part II of the Registration Statement. The Company will also pay or reimburse the Underwriters (to the extent incurred by them) for costs and expenses of the Underwriters and the Company’s officers and employees and any other expenses of the Underwriters and the Company relating to investor presentations or any “road show” in connection with the offering and sale of the Offered Securities including, without limitation, any travel expenses of the Company’s officers and employees and any other expenses of the Company, including 50% of the cost of the chartering of airplanes. It is understood, however, that except as provided in this Section 5(h) and Sections 8 and 10 hereof, the Underwriters will pay all of their own costs and expenses, including the fees of their counsel and any road show expenses incurred by them (other than costs and expenses incurred by the Underwriters on behalf of the Company).

(i) Use of Proceeds. The Company will use the net proceeds received by it in connection with this offering in the manner described in the “Use of Proceeds” section of the General Disclosure Package and the Final Prospectus and, except as disclosed in the General Disclosure Package and the Final Prospectus, the Company does not intend to use any of the proceeds from the sale of the Offered Securities hereunder to repay any outstanding debt owed to any affiliate of any Underwriter.

(j) Absence of Manipulation. The Company and the Selling Stockholders will not take, directly or indirectly, any action designed to or that would constitute or that might reasonably be expected to cause or result in, stabilization or manipulation of the price of any securities of the Company to facilitate the sale or resale of the Offered Securities.

(l) (A) Restriction on Sale of Securities by the Company. For the period specified below (the “Lock-Up Period”), the Company will not, directly or indirectly, take any of the following actions with respect to its Securities or any securities convertible into or exchangeable or exercisable for any of its Securities (“Lock-Up Securities”): (i) offer, sell, issue, contract to sell, pledge or otherwise dispose of Lock-Up Securities (other than the Offered Securities and shares issued pursuant to employee benefit plans, qualified stock option plans or other employee compensation plans existing on the date hereof and described in the Preliminary Prospectus or the General Disclosure Package), (ii) offer, sell, issue, contract to sell, contract to purchase or grant any option, right or warrant to purchase Lock-Up Securities (other than the grant of options pursuant to employee benefit plans, option plans, qualified

stock option plans or other employee compensation plans existing on the date hereof and described in the Preliminary Prospectus or the General Disclosure Package), (iii) enter into any swap, hedge or any other agreement that transfers, in whole or in part, the economic consequences of ownership of Lock-Up Securities, (iv) establish or increase a put equivalent position or liquidate or decrease a call equivalent position in Lock-Up Securities within the meaning of Section 16 of the Exchange Act or (v) file with the Commission a registration statement under the Act relating to Lock-Up Securities, or publicly disclose the intention to take any such action, without the prior written consent of Credit Suisse Securities (USA) LLC (“Credit Suisse”), except (i) issuances of Lock-Up Securities pursuant to the conversion or exchange of convertible or exchangeable securities or the exercise of warrants or options, in each case outstanding on the date hereof and (ii) the filing of a registration statement on Form S-8 relating to, and the issuance and sale of Lock-Up Securities pursuant to, the terms of a plan described in the General Disclosure Package and the Final Prospectus. The initial Lock-Up Period will commence on the date hereof and continue for 180 days after the date hereof or such earlier date that Credit Suisse consents to in writing.

(B) Agreement to announce lock-up waiver. If Credit Suisse, in its sole discretion, agrees to release or waive the restrictions set forth in a lock-up letter described in Section 7(l) hereof for an officer or director of the Company and provides the Company with notice of the impending release or waiver at least three business days before the effective date of the release or waiver, the Company agrees to announce the impending release or waiver by a press release substantially in the form of Exhibit A hereto through a major news service at least two business days before the effective date of the release or waiver

(m) Transfer Restrictions. In connection with the Directed Share Program, the Company will ensure that the Directed Shares will be restricted to the extent required by the FINRA or the FINRA rules from sale, transfer, assignment, pledge or hypothecation for a period of three months following the date of the effectiveness of the Registration Statement. The Designated Underwriter will notify the Company as to which Participants will need to be so restricted. The Company will direct the transfer agent to place stop transfer restrictions upon such securities for such period of time.

(n) Payment of Expenses Related to Directed Share Program. The Company will pay all reasonable and documented fees and disbursements of counsel (including non-U.S. counsel) incurred by the Underwriters in connection with the Directed Share Program and stamp duties, similar taxes or duties or other taxes, if any, incurred by the underwriters in connection with the Directed Share Program.

(o) Compliance with Foreign Laws. The Company will comply with all applicable securities and other applicable laws, rules and regulations in each foreign jurisdiction in which the Directed Shares are offered in connection with the Directed Share Program.

6. Free Writing Prospectuses. The Company and Selling Stockholders represent and agree that, unless they obtain the prior consent of the Representatives, and each Underwriter represents and agrees that, unless it obtains the prior consent of the Company and the Representatives, it has not made and will not make any offer relating to the Offered Securities that would constitute an Issuer Free Writing Prospectus, or that would otherwise constitute a “free writing prospectus,” as defined in Rule 405, required to be filed with the Commission. Any such free writing prospectus consented to by the Company and the Representatives is hereinafter referred to as a “Permitted Free Writing Prospectus.” The Company and the Representatives agree that any such Permitted Free Writing Prospectus is listed on Schedule C hereto. The Company represents that it has treated and agrees that it will treat each Permitted Free Writing Prospectus as an “issuer free writing prospectus,” as defined in Rule 433, and has complied and will comply with the requirements of Rules 164 and 433 applicable to any Permitted Free Writing Prospectus, including timely Commission filing where required, legending and record keeping. The Company represents that it has satisfied and agrees that it will satisfy the conditions in Rule 433 to avoid a requirement to file with the Commission any electronic road show. If

at any time following issuance of an Issuer Free Writing Prospectus, at a time when a prospectus relating to the Offered Securities is (or but for the exemption of Rule 172 would be) required to be delivered under the Act by any Underwriter or dealer, there occurred or occurs an event or development as a result of which such Issuer Free Writing Prospectus conflicted or would conflict with the information then contained in the Registration Statement or as a result of which such Issuer Free Writing Prospectus, if republished immediately following such event or development, would include an untrue statement of a material fact or omitted or would omit to state a material fact necessary in order to make the statements therein, in the light of the circumstances under which they were made, not misleading, the Company will promptly notify the Representatives and will promptly amend or supplement such Issuer Free Writing Prospectus to eliminate or correct such conflict, untrue statement or omission.

7. Conditions of the Obligations of the Underwriters. The obligations of the several Underwriters to purchase and pay for the Firm Securities on the First Closing Date and the Optional Securities to be purchased on each Optional Closing Date will be subject to the accuracy of the representations and warranties of the Company and the Selling Stockholders herein (as though made on such Closing Date), to the accuracy of the statements of Company officers made pursuant to the provisions hereof, to the performance by the Company and the Selling Stockholders of their obligations hereunder and to the following additional conditions precedent:

(a) KPMG Comfort Letter. The Representatives shall have received a “comfort letter,” dated the date hereof, of KPMG LLP in form and substance satisfactory to the Representatives, covering the financial information in the Registration Statements, the General Disclosure Package and the Final Prospectus and other customary matters. In addition, on each Closing Date, the Underwriters shall have received from such accountant a “bring-down comfort letter” dated such Closing Date addressed to the Underwriters, in form and substance satisfactory to the Representatives, in the form of the “comfort letter” delivered on the date hereof, except that (i) it shall cover the financial information in the Registration Statement and the Final Prospectus and any amendment or supplement thereto and (ii) procedures shall be brought down to a date no more than three (3) days prior to such Closing Date.

(b) Netherland ▇▇▇▇▇▇ Comfort Letter. The Representatives shall have received a letter, dated the date hereof, of Netherland, ▇▇▇▇▇▇ & Associates, Inc., independent petroleum engineers, in form and substance satisfactory to the Representatives, covering the oil and gas reserves information in the Registration Statement, the General Disclosure Package and the Final Prospectus and other customary matters. In addition, on each Closing Date, the Underwriters shall have received from such independent petroleum engineers a “bring-down comfort letter” dated such Closing Date addressed to the Underwriters, in form and substance satisfactory to the Representatives, in the form of the “comfort letter” delivered on the date hereof, except that (i) it shall cover the oil and gas reserves information in the Registration Statement and the Final Prospectus and any amendment or supplement thereto and (ii) procedures shall be brought down to a date no more than three (3) days prior to the Closing Date.

(c) Effectiveness of Registration Statement. If the Effective Time of the Additional Registration Statement (if any) is not prior to the execution and delivery of this Agreement, such Effective Time shall have occurred not later than 10:00 P.M., New York time, on the date of this Agreement or, if earlier, the time the Final Prospectus is finalized and distributed to any Underwriter, or shall have occurred at such later time as shall have been consented to by the Representatives. The Final Prospectus shall have been filed with the Commission in accordance with the Rules and Regulations and Section 5(a) hereof. Prior to such Closing Date, no stop order suspending the effectiveness of a Registration Statement shall have been issued and no proceedings for that purpose shall have been instituted or, to the knowledge of any Selling Stockholder, the Company or the Representatives, shall be contemplated by the Commission.

(d) No Material Adverse Change. Subsequent to the execution and delivery of this Agreement, there shall not have occurred (i) any change, or any development or event involving a prospective change, in the condition (financial or otherwise), results of operations, business, properties or prospects of the Company and its Subsidiaries taken as a whole which, in the judgment of the Representatives, is material and adverse and makes it impractical or inadvisable to market the Offered Securities; (ii) any downgrading in the rating of any debt securities of the Company by any “nationally recognized statistical rating organization” (as defined in Section 3(a)(62) of the Exchange Act), or any public announcement that any such organization has under surveillance or review its rating of any debt securities of the Company (other than an announcement with positive implications of a possible upgrading, and no implication of a possible downgrading, of such rating) or any announcement that the Company has been placed on negative outlook; (iii) any change in U.S. or international financial, political or economic conditions or currency exchange rates or exchange controls the effect of which is such as to make it, in the judgment of the Representatives, impractical to market or to enforce contracts for the sale of the Offered Securities, whether in the primary market or in respect of dealings in the secondary market; (iv) any suspension or material limitation of trading in securities generally on the New York Stock Exchange, or any setting of minimum or maximum prices for trading on such exchange; (v) or any suspension of trading of any securities of the Company on any exchange or in the over-the-counter market; (vi) any banking moratorium declared by any U.S. federal or New York authorities; (vii) any major disruption of settlements of securities, payment or clearance services in the United States or any other country where such securities are listed or (viii) any attack on, outbreak or escalation of hostilities or act of terrorism involving the United States, any declaration of war by Congress or any other national or international calamity or emergency if, in the judgment of the Representatives, the effect of any such attack, outbreak, escalation, act, declaration, calamity or emergency is such as to make it impractical or inadvisable to market the Offered Securities or to enforce contracts for the sale of the Offered Securities.

(e) Opinion of Counsel for the Company. The Representatives shall have received an opinion, dated such Closing Date, of ▇▇▇▇▇▇ & ▇▇▇▇▇▇ L.L.P., as to the matters described in Schedule F hereto

(f) Opinion of General Counsel for the Company. The Representatives shall have received an opinion, dated such Closing Date, of ▇▇▇▇▇ ▇. ▇▇▇▇▇▇▇, General Counsel for the Company, as to the matters described in Schedule G hereto.

(g) Opinion of Counsel for Selling Stockholders. The Representatives shall have received an opinion, dated such Closing Date, of ▇▇▇▇▇▇ & ▇▇▇▇▇▇ L.L.P., as to the matters described in Schedule H hereto.

(h) Opinion of Counsel for Underwriters. The Representatives shall have received from ▇▇▇▇▇▇ & ▇▇▇▇▇▇▇ LLP, counsel for the Underwriters, such opinion or opinions, dated such Closing Date, with respect to such matters as the Representatives may require, and the Selling Stockholders and the Company shall have furnished to such counsel such documents as they request for the purpose of enabling them to pass upon such matters.

(i) Officer’s Certificate. The Representatives shall have received a certificate, dated such Closing Date, of an executive officer of the Company and a principal financial or accounting officer of the Company in which such officers shall state that: the representations and warranties of the Company in this Agreement are true and correct; the Company has complied with all agreements and satisfied all conditions on its part to be performed or satisfied hereunder at or prior to such Closing Date; no stop order suspending the effectiveness of any Registration Statement has been issued and no proceedings for that purpose have been instituted or, to the best of their knowledge and after reasonable investigation, are contemplated by the Commission; the Additional Registration Statement (if any) satisfying the requirements of subparagraphs (1) and (3) of Rule 462(b) was timely filed pursuant to Rule

462(b), including payment of the applicable filing fee in accordance with Rule 111(a) or (b) of Regulation S-T of the Commission; and, subsequent to the date of the most recent financial statements in the General Disclosure Package and the Final Prospectus, there has been no material adverse change, nor any development or event involving a prospective material adverse change, in the condition (financial or otherwise), results of operations, business, properties or prospects of the Company and its Subsidiaries taken as a whole except as set forth in the General Disclosure Package, the Final Prospectus or as described in such certificate.

(j) Lock-Up Agreements. On or prior to the date hereof, Credit Suisse shall have received lockup letters in the form of Exhibit B from each of the parties listed on Schedule I hereto.

The Selling Stockholders and the Company will furnish the Representatives with any additional opinions, certificates, letters and documents as the Representatives reasonably request and conformed copies of documents delivered pursuant to this Section 7. The Representatives may in their sole discretion waive on behalf of the Underwriters compliance with any conditions to the obligations of the Underwriters hereunder, whether in respect of an Optional Closing Date or otherwise.

8. Indemnification and Contribution. (a) Indemnification of Underwriters by Company. The Company will indemnify and hold harmless each Underwriter, its partners, members, directors, officers, employees, agents, affiliates and each person, if any, who controls such Underwriter within the meaning of Section 15 of the Act or Section 20 of the Exchange Act (each an “Indemnified Party”), against any and all losses, claims, damages or liabilities, joint or several, to which such Indemnified Party may become subject, under the Act, the Exchange Act, other Federal or state statutory law or regulation or otherwise, insofar as such losses, claims, damages or liabilities (or actions in respect thereof) arise out of or are based upon any untrue statement or alleged untrue statement of any material fact contained in any part of any Registration Statement at any time, any Statutory Prospectus as of any time, the Final Prospectus or any Issuer Free Writing Prospectus, or arise out of or are based upon the omission or alleged omission of a material fact required to be stated therein or necessary to make the statements therein not misleading, and will reimburse each Indemnified Party for any legal or other expenses reasonably incurred by such Indemnified Party in connection with investigating or defending against any loss, claim, damage, liability, action, litigation, investigation or proceeding whatsoever (whether or not such Indemnified Party is a party thereto), whether threatened or commenced, and in connection with the enforcement of this provision with respect to any of the above as such expenses are incurred; provided, however, that the Company will not be liable in any such case to the extent that any such loss, claim, damage or liability arises out of or is based upon an untrue statement or alleged untrue statement in or omission or alleged omission from any of such documents in reliance upon and in conformity with written information furnished to the Company by any Underwriter through the Representatives specifically for use therein, it being understood and agreed that the only such information furnished by any Underwriter consists of the information described as such in subsection (c) below.

The Company agrees to indemnify and hold harmless the Designated Underwriter and its affiliates and each person, if any, who controls the Designated Underwriter within the meaning of either Section 15 of the Act or Section 20 of the Exchange Act (the “Designated Entities”), from and against any and all losses, claims, damages and liabilities (including, without limitation, any legal or other expenses reasonably incurred in connection with defending or investigating any such action or claim) (i) arising out of or based upon any untrue statement or alleged untrue statement of a material fact contained in any material prepared by or with the consent of the Company for distribution to Participants in connection with the Directed Share Program or arising out of or based upon any omission or alleged omission of a material fact required to be stated therein or necessary to make the statements therein not misleading; (ii) arising out of or based upon the failure of any Participant to pay for and accept delivery of Directed Shares that the Participant agreed to purchase; or (iii) arising out of, related to, or in connection with the Directed Share Program, other than losses, claims, damages or liabilities (or expenses relating thereto) that are finally judicially determined to have resulted from the willful misconduct or gross negligence of the Designated Entities.

(b) Indemnification of Underwriters by Selling Stockholders. The Selling Stockholders, severally and not jointly, will indemnify and hold harmless each Underwriter, its partners, members, directors, officers, employees, agents, affiliates and each person, if any, who controls such Underwriter within the meaning of Section 15 of the Act or Section 20 of the Exchange Act (each, an “Indemnified Party”), against any and all losses, claims, damages or liabilities, joint or several, to which such Indemnified Party may become subject, under the Act, the Exchange Act, other Federal or state statutory law or regulation or otherwise, insofar as such losses, claims, damages or liabilities (or actions in respect thereof) arise out of or are based upon any untrue statement or alleged untrue statement of any material fact contained in any part of any Registration Statement at any time, any Statutory Prospectus as of any time, the Final Prospectus or any Issuer Free Writing Prospectus, or arise out of or are based upon the omission or alleged omission of a material fact required to be stated therein or necessary to make the statements therein not misleading, in each case to the extent, but only to the extent, that such untrue statement or alleged untrue statement or omission or alleged omission was made in the Registration Statement, any Preliminary Prospectus, the General Disclosure Package or the Final Prospectus or any such amendment or supplement thereto, or any Issuer Free Writing Prospectus, in reliance upon and in conformity with the Selling Stockholder Information; and will reimburse each Indemnified Party for any legal or other expenses reasonably incurred by such Indemnified Party in connection with investigating or defending against any loss, claim, damage, liability, action, litigation, investigation or proceeding whatsoever (whether or not such Indemnified Party is a party thereto), whether threatened or commenced, and in connection with the enforcement of this provision with respect to the above as such expenses are incurred. The aggregate liability of each Selling Stockholder under Section 8(b) and Section 8(e) or any claim for breach of representations and warranties of such Selling Stockholder contained in Section 2 shall be limited to the aggregate net proceeds, after underwriting discounts but before deducting expenses received by such Selling Stockholder, from the offering of the Offered Securities purchased under the Agreement received by such Selling Stockholder, as set forth in the table on the cover page of the Final Prospectus.

(c) Indemnification of Company and Selling Stockholders. Each Underwriter will severally and not jointly indemnify and hold harmless the Company, each of its directors and each of its officers who signs a Registration Statement and each person, if any, who controls the Company within the meaning of Section 15 of the Act or Section 20 of the Exchange Act, and each Selling Stockholder (each, an “Underwriter Indemnified Party”) against any losses, claims, damages or liabilities to which such Underwriter Indemnified Party may become subject, under the Act, the Exchange Act, or other Federal or state statutory law or regulation or otherwise, insofar as such losses, claims, damages or liabilities (or actions in respect thereof) arise out of or are based upon any untrue statement or alleged untrue statement of any material fact contained in any Registration Statement at any time, any Statutory Prospectus at any time, the Final Prospectus or any Issuer Free Writing Prospectus or arise out of or are based upon the omission or the alleged omission of a material fact required to be stated therein or necessary to make the statements therein not misleading, in each case to the extent, but only to the extent, that such untrue statement or alleged untrue statement or omission or alleged omission was made in reliance upon and in conformity with written information furnished to the Company by such Underwriter through the Representatives specifically for use therein, and will reimburse any legal or other expenses reasonably incurred by such Underwriter Indemnified Party in connection with investigating or defending against any such loss, claim, damage, liability, action, litigation, investigation or proceeding whatsoever (whether or not such Underwriter Indemnified Party is a party thereto), whether threatened or commenced, based upon any such untrue statement or omission, or any such alleged untrue statement or omission as such expenses are incurred, it being understood and agreed that the only such information furnished by any Underwriter consists of the following information in the Final Prospectus furnished on behalf of each Underwriter: (i) the concession and reallowance figures appearing in the fifth paragraph under the caption “Underwriting (Conflicts of Interest)” and (ii) the paragraph relating to stabilization by the Underwriters under the caption “Underwriting (Conflicts of Interest)”.

(d) Actions against Parties; Notification. Promptly after receipt by an indemnified party under this Section of notice of the commencement of any action, such indemnified party will, if a claim in respect thereof is to be made against an indemnifying party under subsection (a), (b) or (c) above, notify the indemnifying party of the commencement thereof; but the failure to notify the indemnifying party shall not relieve it from any liability that it may have under subsection (a), (b) or (c) above except to the extent that it has been materially prejudiced (through the forfeiture of substantive rights or defenses) by such failure; and provided further that the failure to notify the indemnifying party shall not relieve it from any liability that it may have to an indemnified party otherwise than under subsection (a), (b) or (c) above. In case any such action is brought against any indemnified party and it notifies an indemnifying party of the commencement thereof, the indemnifying party will be entitled to participate therein and, to the extent that it may wish, jointly with any other indemnifying party similarly notified, to assume the defense thereof, with counsel satisfactory to such indemnified party (who shall not, except with the consent of the indemnified party, be counsel to the indemnifying party), and after notice from the indemnifying party to such indemnified party of its election so to assume the defense thereof, the indemnifying party will not be liable to such indemnified party under this Section for any legal or other expenses subsequently incurred by such indemnified party in connection with the defense thereof other than reasonable costs of investigation. Notwithstanding anything contained herein to the contrary, if indemnity may be sought pursuant to the last paragraph in Section 8(a) hereof in respect of such action or proceeding, then in addition to such separate firm for the indemnified parties, the indemnifying party shall be liable for the reasonable fees and expenses of not more than one separate firm (in addition to any local counsel) for the Designated Underwriter for the defense of any losses, claims, damages and liabilities arising out of the Directed Share Program, and all persons, if any, who control the Designated Underwriter within the meaning of either Section 15 of the Act of Section 20 of the Exchange Act. No indemnifying party shall, without the prior written consent of the indemnified party, effect any settlement of any pending or threatened action in respect of which any indemnified party is or could have been a party and indemnity could have been sought hereunder by such indemnified party unless such settlement (i) includes an unconditional release of such indemnified party from all liability on any claims that are the subject matter of such action and (ii) does not include a statement as to, or an admission of, fault, culpability or a failure to act by or on behalf of an indemnified party.

(e) Contribution. If the indemnification provided for in this Section is unavailable or insufficient to hold harmless an indemnified party under subsection (a), (b) or (c) above, then each indemnifying party shall contribute to the amount paid or payable by such indemnified party as a result of the losses, claims, damages or liabilities referred to in subsection (a), (b) or (c) above (i) in such proportion as is appropriate to reflect the relative benefits received by the Company and the Selling Stockholders on the one hand and the Underwriters on the other from the offering of the Securities 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 Company and the Selling Stockholders on the one hand and the Underwriters on the other in connection with the statements or omissions which resulted in such losses, claims, damages or liabilities as well as any other relevant equitable considerations. The relative benefits received by the Company and the Selling Stockholders on the one hand and the Underwriters on the other shall be deemed to be in the same proportion as the total net proceeds from the offering (before deducting expenses) received by the Company and the Selling Stockholders bear to the total underwriting discounts and commissions received by the Underwriters. The relative fault shall be determined by reference to, among other things, whether the untrue or alleged untrue statement of a material fact or the omission or alleged omission to state a material fact relates to information supplied by the Company, the Selling Stockholders or the Underwriters and the parties’ relative intent, knowledge, access to information and opportunity to correct or prevent such untrue statement or omission. The amount paid by an indemnified party as a result of the losses, claims, damages or liabilities referred to in the first sentence of this subsection (e) shall be deemed to include any legal or other expenses reasonably incurred by such indemnified party in connection with investigating or defending any action or claim which is the subject of this subsection (e). Notwithstanding the provisions of this subsection (e), no Underwriter shall be required to contribute any amount in excess of the amount by which the total price at which the Securities underwritten by it and distributed to the public were offered to the public exceeds the amount of any damages which 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 Act) shall be entitled to contribution from any person who was not guilty of such fraudulent misrepresentation. The Underwriters’ obligations in this subsection (e) to contribute are several in proportion to their respective underwriting obligations and not joint. The Company, the Selling Stockholders and the Underwriters agree that it would not be just and equitable if contribution pursuant to this Section 8(e) were determined by pro rata allocation (even if the Underwriters were treated as one entity for such purpose) or by any other method of allocation which does not take account of the equitable considerations referred to in this Section 8(e).

9. Default of Underwriters. If any Underwriter or Underwriters default in their obligations to purchase Offered Securities hereunder on either the First Closing Date or any Optional Closing Date and the aggregate number of shares of Offered Securities that such defaulting Underwriter or Underwriters agreed but failed to purchase does not exceed 10% of the total number of shares of Offered Securities that the Underwriters are obligated to purchase on such Closing Date, the Representatives may make arrangements satisfactory to the Company and the Selling Stockholders for the purchase of such Offered Securities by other persons, including any of the Underwriters, but if no such arrangements are made by such Closing Date, the non-defaulting Underwriters shall be obligated severally, in proportion to their respective commitments hereunder, to purchase the Offered Securities that such defaulting Underwriters agreed but failed to purchase on such Closing Date. If any Underwriter or Underwriters so default and the aggregate number of shares of Offered Securities with respect to which such default or defaults occur exceeds 10% of the total number of shares of Offered Securities that the Underwriters are obligated to purchase on such Closing Date and arrangements satisfactory to the Representatives, the Company and the Selling Stockholders for the purchase of such Offered Securities by other persons are not made within 36 hours after such default, this Agreement will terminate without liability on the part of any non-defaulting Underwriter, the Company or the Selling Stockholders, except as provided in Section 10 (provided that if such default occurs with respect to Optional Securities after the First Closing Date, this Agreement will not terminate as to the Firm Securities or any Optional Securities purchased prior to such termination). As used in this Agreement, the term “Underwriter” includes any person substituted for an Underwriter under this Section. Nothing herein will relieve a defaulting Underwriter from liability for its default.

10. Survival of Certain Representations and Obligations. The respective indemnities, agreements, representations, warranties and other statements of the Selling Stockholders, of the Company or its officers and of the several Underwriters set forth in or made pursuant to this Agreement will remain in full force and effect, regardless of any investigation, or statement as to the results thereof, made by or on behalf of any Underwriter, any Selling Stockholder, the Company or any of their respective representatives, officers or directors or any controlling person, and will survive delivery of and payment for the Offered Securities. If the purchase of the Offered Securities by the Underwriters is not consummated for any reason other than solely because of the termination of this Agreement pursuant to Section 9 or the occurrence of any event specified in clause (iv), (vi), (vii) or (viii) of Section 7(d) hereof, the Company and the Selling Stockholders will, jointly and severally, reimburse the Underwriters for all out-of-pocket expenses (including reasonable documented fees and disbursements of counsel) reasonably incurred by them in connection with the offering of the Offered Securities, and the respective obligations of the Company, the Selling Stockholders and the Underwriters pursuant to Section 8 hereof shall remain in effect. In addition, if any Offered Securities have been purchased hereunder, the representations and warranties in Section 2 and all obligations under Section 5 shall also remain in effect.

11. Notices. All communications hereunder will be in writing and, if sent to the Underwriters, will be mailed, hand delivered or telecopied and confirmed to the Representatives at Credit Suisse Securities (USA) LLC, Eleven ▇▇▇▇▇▇▇ ▇▇▇▇▇▇, ▇▇▇ ▇▇▇▇, ▇▇▇ ▇▇▇▇ ▇▇▇▇▇-▇▇▇▇, Attention: LCD-IBD and ▇▇▇▇▇▇▇, ▇▇▇▇▇ & Co., ▇▇ ▇▇▇▇▇ ▇▇▇▇▇▇, ▇▇▇ ▇▇▇▇, ▇▇▇ ▇▇▇▇ ▇▇▇▇▇ or, if sent to the Company, will be mailed, hand delivered or telecopied and confirmed to it at ▇▇▇ ▇▇▇▇ ▇^▇▇ ▇▇▇▇▇▇, ▇▇▇▇▇ ▇▇▇, ▇▇▇▇▇▇, ▇▇▇▇▇ ▇▇▇▇▇ Attention: ▇▇▇▇▇ ▇. ▇▇▇▇▇▇▇, or, if sent to the Selling Stockholders or any of them, will be mailed, hand delivered or telecopied and confirmed to counsel for the Selling Stockholders; provided, however, that any notice to an Underwriter pursuant to Section 8 will be mailed, hand delivered or telecopied and confirmed to such Underwriter.

12. Successors. This Agreement will inure to the benefit of and be binding upon the parties hereto and their respective personal representatives and successors and the officers and directors and controlling persons referred to in Section 7, and no other person will have any right or obligation hereunder.

13. Representation of Underwriters. The Representatives will act for the several Underwriters in connection with the transactions contemplated by this Agreement, and any action under this Agreement taken by the Representatives jointly or by Credit Suisse will be binding upon all the Underwriters.

14. Counterparts. This Agreement may be executed in any number of counterparts, each of which shall be deemed to be an original, but all such counterparts shall together constitute one and the same Agreement.

15. Absence of Fiduciary Relationship. The Company and the Selling Stockholders acknowledge and agree that:

(a) No Other Relationship. The Representatives have been retained solely to act as underwriters in connection with the sale of the Offered Securities and that no fiduciary, advisory or agency relationship between the Company or the Selling Stockholders, on the one hand, and the Representatives, on the other, has been created in respect of any of the transactions contemplated by this Agreement or the Final Prospectus, irrespective of whether the Representatives have advised or are advising the Company or the Selling Stockholders on other matters;

(b) Arms’ Length Negotiations. The price of the Offered Securities set forth in this Agreement was established by Company and the Selling Stockholders following discussions and arms-length negotiations with the Representatives and the Company and the Selling Stockholders are capable of evaluating and understanding and understand and accept the terms, risks and conditions of the transactions contemplated by this Agreement;

(c) Absence of Obligation to Disclose. The Company and the Selling Stockholders have been advised that the Representatives and its affiliates are engaged in a broad range of transactions which may involve interests that differ from those of the Company or the Selling Stockholders and that the Representatives have no obligation to disclose such interests and transactions to the Company or the Selling Stockholders by virtue of any fiduciary, advisory or agency relationship; and

(d) Waiver. The Company and the Selling Stockholders waive, to the fullest extent permitted by law, any claims they may have against the Representatives for breach of fiduciary duty or alleged breach of fiduciary duty and agree that the Representatives shall have no liability (whether direct or indirect) to the Company or the Selling Stockholders in respect of such a fiduciary duty claim or to any person asserting a fiduciary duty claim on behalf of or in right of the Company, including stockholders, employees or creditors of the Company.

16. Applicable Law. This Agreement shall be governed by, and construed in accordance with, the laws of the State of New York.

The Company hereby submits to the non-exclusive jurisdiction of the Federal and state courts in the Borough of Manhattan in The City of New York in any suit or proceeding arising out of or relating to this Agreement or the transactions contemplated hereby. The Company irrevocably and unconditionally waives any objection to the laying of venue of any suit or proceeding arising out of or relating to this Agreement or the transactions contemplated hereby in Federal and state courts in the

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▇▇▇▇▇▇▇ ▇▇ ▇▇▇▇▇▇▇▇▇ in the City of New York and irrevocably and unconditionally waives and agrees not to plead or claim in any such court that any such suit or proceeding in any such court has been brought in an inconvenient forum.

17. 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 Company and the Selling Stockholder, 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.

[Signature Pages Follows]

If the foregoing is in accordance with the Representatives’ understanding of our agreement, kindly sign and return to the Company one of the counterparts hereof, whereupon it will become a binding agreement among the Selling Stockholders, the Company and the several Underwriters in accordance with its terms.


Very truly yours,

PARSLEY ENERGY, INC.

By:
	Name:	▇▇▇▇▇ ▇▇▇▇▇▇▇▇▇
	Title:	Chief Executive Officer

Signature Page to Underwriting Agreement

Very truly yours,

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Signature Page to Underwriting Agreement


Very truly yours,

SHEFFIELD ENERGY MANAGEMENT, LLC

By:
		Name:
		Title:

Signature Page to Underwriting Agreement

Very truly yours,

▇▇▇▇▇▇▇ ▇▇▇▇▇▇

Signature Page to Underwriting Agreement

Very truly yours,

▇▇▇▇ ▇▇▇▇▇▇▇▇▇

Signature Page to Underwriting Agreement

Very truly yours,

▇▇▇▇ ▇▇▇▇▇▇▇▇▇

Signature Page to Underwriting Agreement

Very truly yours,

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Signature Page to Underwriting Agreement


Very truly yours,

DIAMOND K INTERESTS, LP

By:
		Name:
		Title:

Signature Page to Underwriting Agreement


Very truly yours,

PARSLEY INTERESTS, LP

By:
		Name:
		Title:

Signature Page to Underwriting Agreement


Very truly yours,

ONE PUTT OIL & GAS LTD.

By:
		Name:
		Title: