GMX RESOURCES INC. 21,075,000 Shares of Common Stock UNDERWRITING AGREEMENT

Exhibit 1.1

GMX RESOURCES INC.

21,075,000 Shares of Common Stock

UNDERWRITING AGREEMENT

February 4, 2011

▇▇▇▇▇▇ ▇▇▇▇▇▇▇ & CO. INCORPORATED

CREDIT SUISSE SECURITIES (USA) LLC,

As Representatives of the Several Underwriters,

c/o Morgan ▇▇▇▇▇▇▇ & Co. Incorporated

▇▇▇▇ ▇▇▇▇▇▇▇▇

▇▇▇ ▇▇▇▇, ▇▇▇ ▇▇▇▇ ▇▇▇▇▇

c/o Credit Suisse Securities (USA) LLC

Eleven ▇▇▇▇▇▇▇ ▇▇▇▇▇▇

▇▇▇ ▇▇▇▇, ▇▇▇ ▇▇▇▇ ▇▇▇▇▇

Dear Sirs:

1. Introductory. GMX Resources Inc., an Oklahoma corporation (“Company”), agrees with the several underwriters named in Schedule A hereto (“Underwriters”) to issue and sell to the several Underwriters 21,075,000 shares (“Firm Securities”) of its common stock, par value $0.001 per share (the “Common Stock”) and also agrees to issue and sell to the Underwriters, at the option of the Underwriters, an aggregate of not more than 3,161,250 additional shares of its Common Stock (“Optional Securities”) on the terms set forth below. The Firm Securities and the Optional Securities are herein collectively called the “Offered Securities”.

Substantially concurrently with the offering of the Offered Securities, the Company will conduct (i) a tender offer (the “Tender Offer”) to purchase up to $50.0 million aggregate principal amount of the Company’s 5.00% Convertible Senior Notes due 2013 and (ii) an offering under Rule 144A and Regulation S under the Act of U.S.$200 million principal amount of its 11.375% Senior Notes due 2019 (the “Debt Offering”). In connection with the transactions described herein, the Company has entered into an amendment and restatement of its existing Revolving Credit Agreement (as defined below).

2. Representations and Warranties of the Company. The Company represents and warrants to, and agrees with, the several Underwriters that:

(a) Filing and Effectiveness of Registration Statement; Certain Defined Terms. The Company has filed with the Commission a registration statement on Form S-3 (No. 333-171521), including a related prospectus or prospectuses, covering the registration of the Offered Securities under the Act, which has become effective. “Registration Statement” at any particular time means such registration statement in the form then filed with the Commission, including any amendment thereto, any document incorporated by reference therein and all 430B Information and all 430C Information with respect to such registration

statement, that in any case has not been superseded or modified. “Registration Statement” without reference to a time means the Registration Statement as of the Effective Time. For purposes of this definition, 430B Information shall be considered to be included in the Registration Statement as of the time specified in Rule 430B.

For purposes of this Agreement:

“430B Information” means information included in a prospectus then deemed to be a part of the Registration Statement pursuant to Rule 430B(e) or retroactively deemed to be a part of the Registration Statement pursuant to Rule 430B(f).

“430C Information” means information included in a prospectus then deemed to be a part of the Registration Statement pursuant to Rule 430C.

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

“Applicable Time” means 9:17a.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” of the Registration Statement relating to the Offered Securities means the time of the first contract of sale for the Offered Securities.

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

“Final Prospectus” means the Statutory Prospectus that discloses the public offering price, other 430B 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 B 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.

“Revolving Credit Agreement” means, that certain Fourth Amended and Restated Loan Agreement dated as of July 8, 2010, among the Company, as borrower, Capital One, National Association, a national banking association, as administrative agent and the other financial institutions from time to time party thereto, as amended and supplemented by the first amendment thereto, dated December 13, 2010, and the second amendment thereto dated December 21, 2010, as may be further amended, amended and restated, supplemented or otherwise modified form time to time.

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

“Securities Laws” means, collectively, the ▇▇▇▇▇▇▇▇-▇▇▇▇▇ Act of 2002 (“▇▇▇▇▇▇▇▇-▇▇▇▇▇”), the Act, the Exchange Act, the Rules and Regulations, the auditing principles, rules, standards and practices applicable to auditors of “issuers” (as defined in ▇▇▇▇▇▇▇▇-▇▇▇▇▇) promulgated or approved by the Public Company Accounting Oversight Board and, as applicable, the rules of the New York Stock Exchange and the NASDAQ Stock Market (“Exchange Rules”).

“Statutory Prospectus” with reference to any particular time means the prospectus relating to the Offered Securities that is included in the Registration Statement immediately prior to that time, including all 430B Information and all 430C Information with respect to the Registration Statement. For purposes of the foregoing definition, 430B Information shall be considered to be included in the Statutory Prospectus only as of the actual time that form of prospectus (including a prospectus supplement) is filed with the Commission pursuant to Rule 424(b) and not retroactively.

(b) Compliance with Securities Act Requirements. Neither the Commission nor any state or other jurisdiction or other regulatory body has issued, and neither is, to the knowledge of the Company, threatening to issue, any stop order under the Act or other order suspending the effectiveness of the Registration Statement. (i) (A) At the time the Registration Statement initially became effective, (B) at the time of each amendment thereto for the purposes of complying with Section 10(a)(3) of the Act (whether by post-effective amendment, incorporated report or form of prospectus), (C) at the Effective Time relating to the Offered Securities and (D) on the Closing Date, the Registration Statement conformed and will conform in all respects to the requirements of the Act and the Rules and Regulations and did not 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 not misleading and (ii) (A) on its date, (B) at the time of filing the Final Prospectus pursuant to Rule 424(b) and (C) on the 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 not misleading. 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(b) hereof.

(c) Shelf Registration Statement. The date of the Underwriting Agreement is not more than three years subsequent to the initial effective time of the Registration Statement. If, immediately prior to the third anniversary of the initial effective time of the Registration Statement, any of the Offered Securities remain unsold by the Underwriters, the Company will prior to that third anniversary file, if it has not already done so, a new shelf registration statement relating to the Offered Securities, in a form satisfactory to the Representatives, will use its best efforts to cause such registration statement to be declared effective within 180 days after that third anniversary, and will take all other action necessary or appropriate to permit the public offering and sale of the Offered Securities to continue as contemplated in the expired registration statement relating to the Offered Securities. References herein to the Registration Statement shall include such new shelf registration statement.

(d) Ineligible Issuer Status. At the earliest time after the filing of the Registration Statement at which the Company or another offering participant made a bona fide offer (within the meaning of Rule 164(h)(2)) of the Offered Securities and as of the date hereof, the Company was not and is not an “ineligible issuer” as such term is defined in Rule 405.

(e) 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 and the preliminary prospectus supplement, dated January 28, 2011, including the base prospectus, dated January 3, 2011, (which is the most recent Statutory Prospectus distributed to investors generally), and the other information, if any, stated in Schedule B 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 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(b) hereof.

(f) 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. If at any time following issuance of an Issuer Free Writing Prospectus 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 light of the circumstances under which they were made, not misleading, (i) the Company has promptly notified or will promptly notify the Representatives and (ii) the Company has promptly amended or will promptly amend or supplement such Issuer Free Writing Prospectus to eliminate or correct such conflict, untrue statement or omission.

(g) Good Standing of the Company. The Company and its Subsidiaries (as defined below) have been duly organized and are validly existing in good standing under the laws of the states or other jurisdictions in which they are incorporated, formed or organized, as applicable with full power and authority (corporate and other) to own, lease and operate their properties and conduct their businesses as described in each of the General Disclosure Package and the Final Prospectus and, with respect to the Company, to execute and deliver, and perform the Company’s obligations under this Agreement; the Company and its Subsidiaries are duly qualified to do business as foreign entities in good standing in each state or other jurisdiction in which their ownership or leasing of property or conduct of their business legally requires such qualification, except where the failure to be so qualified, individually or in the aggregate, would not have a Material Adverse Effect (as defined below). The term “Material Adverse Effect” as used herein means any material adverse effect on the condition (financial or other), net worth, business, management, results of operations or cash flow of the Company and its Subsidiaries, taken as a whole. The Company has no significant subsidiaries (as such term is defined in Rule 1-02(w) of Regulation S-X promulgated by the Commission) other than those Subsidiaries listed on Schedule C hereto (the “Subsidiaries”).

(h) No Material Adverse Change. Neither the Company nor any of its Subsidiaries has sustained since the date of the latest audited financial statements included or incorporated by reference in the General Disclosure Package or Final Prospectus 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 dispute or court or governmental action, order or

decree other than as set forth in each of the General Disclosure Package and the Final Prospectus and, since the respective dates as of which information is given in the General Disclosure Package, there has not been any change in the capital stock or long-term debt of the Company or any of its Subsidiaries or any Material Adverse Change (as defined below), or any development involving a prospective Material Adverse Change, otherwise than as set forth in each of the General Disclosure Package and the Final Prospectus. The term “Material Adverse Change” as used herein means any change that has a Material Adverse Effect.

(i) Offered Securities. The Offered Securities and all other outstanding shares of capital stock of the Company have been duly authorized; the authorized equity capitalization of the Company is as set forth in the General Disclosure Package and the Final Prospectus; all outstanding shares of capital stock of the Company are, 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, conform or will conform to the information in the General Disclosure Package and to the description of such Offered Securities contained in the Final Prospectus; the stockholders of the Company have no preemptive rights with respect to the Common Stock, including the Offered 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 each of the General Disclosure Package and Final Prospectus, there are no outstanding subscription rights, warrants, options, calls, convertible securities, commitments of sale or rights related to or entitling any person to purchase or otherwise to acquire any shares of, or any security convertible into or exchangeable or exercisable for, the capital stock of, or other ownership interest in, the Company, except for such options or rights as may have been granted by the Company to employees, directors or consultants pursuant to its stock option or stock purchase plans. The outstanding shares of capital stock of the Company’s Subsidiaries have been duly authorized and validly issued, are fully paid and nonassessable and, except for liens under the Company’s Revolving Credit Agreement disclosed in each of the General Disclosure Package and Final Prospectus, are owned by the Company free and clear of any mortgage, pledge, lien, encumbrance, charge or adverse claim and are not the subject of any agreement or understanding with any person and were not issued in violation of any preemptive or similar rights; and there are no outstanding subscriptions, rights, warrants, options, calls, convertible securities, commitments of sale or instruments related to or entitling any person to purchase or otherwise acquire any shares of, or any security convertible into or exchangeable or exercisable for, the capital stock of, or other ownership interest in any of the Subsidiaries.

(j) No Registration Rights. Except as disclosed in each of the General Disclosure Package and the Final Prospectus, no holder of any security of the Company, other than the notes issued in the Debt Offering, has any right to require registration of shares of Common Stock or any other security of the Company because of the filing of the Registration Statement or the consummation of the transactions contemplated hereby and, except as disclosed in each of the General Disclosure Package and the Final Prospectus, no person has the right to require registration under the Act for any shares of Common Stock or, other than the notes issued in the Debt Offering, other securities of the Company. Except for this Agreement, no person has the right, contractual or otherwise, to cause the Company to permit such person to underwrite the sale of any of the Offered Securities.

(k) No Finder’s Fee. Except as disclosed in the General Disclosure Package and 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.

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

(m) Absence of Further Requirements. No consent, approval, authorization, or order, registration or qualification of or with any person (including any governmental agency or body or any court) is required for the execution, delivery and performance of the this Agreement or the consummation of the transactions contemplated by this Agreement in connection with this offering, including the issuance and sale of the Offered Securities and compliance with the terms and provisions thereby, except such as have been obtained, or made and such as may be required under the Act or as may be required by the Financial Industry Regulatory Authority (“FINRA”) and such consents, approvals, authorizations, registrations or qualifications as may be required under state securities or blue sky laws in connection with the purchase and distribution of the Offered Securities to investors, the consummation of the Debt Offering and the Tender Offer.

(n) Independent Accounting Firms. ▇▇▇▇▇ ▇▇▇▇▇▇▇▇ LLP, the accounting firm that (i) has issued an opinion on the financial statements filed with or incorporated by reference in and as a part of the Registration Statement and (ii) will deliver the comfort letters set forth under Section 7(a) of this Agreement, is an independent registered public accounting firm within the meaning of the Act and the Rules and Regulations and the rules and regulations of the Public Company Accounting Oversight Board (“PCAOB”) of the United States. ▇▇▇▇▇ ▇▇▇▇▇▇ & Co., the accounting firm that will deliver the comfort letters set forth under Section 7(a) of this Agreement, is an independent registered public accounting firm within the meaning of the Act and the Rules and Regulations and PCAOB of the United States. The Company and each of its Subsidiaries maintain a system of internal accounting controls sufficient to provide reasonable assurance that: (1) transactions are executed in accordance with management’s general or specific authorization; (2) transactions are recorded as necessary to permit preparation of financial statements in conformity with generally accepted accounting principles and to maintain accountability for assets; (3) access to assets is permitted only in accordance with management’s general or specific authorization; and (4) the recorded accounts for assets are compared with the existing assets at reasonable intervals and appropriate action is taken with respect thereto. Except as described in each of the General Disclosure Package and the Final Prospectus, the consolidated financial statements and schedules of the Company, including the notes thereto, filed with (or incorporated by reference) and as a part of the Registration Statement, General Disclosure Package or Final Prospectus, present fairly the financial condition of the Company and its consolidated Subsidiaries as of the respective dates thereof and the consolidated results of operations and changes in financial position and consolidated statements of cash flow for the respective periods covered thereby, and have been prepared in conformity with generally accepted accounting principles in the United States applied on a consistent basis throughout the periods involved except as otherwise disclosed therein. All adjustments necessary for a fair presentation of results for such periods have been made consistent and, in compliance with, accounting principles generally accepted in the United States, the Act and the Rules and Regulations, except that unaudited interim financial statements are subject to year-end audit adjustments. The selected financial data included or incorporated by reference in the Registration Statement, Statutory Prospectus, General Disclosure Package, Final Prospectus or any Issuer Free Writing Prospectus present fairly the information shown therein and have been compiled on a basis consistent with that of the audited financial statements. Any

operating or other statistical data included or incorporated by reference in the Registration Statement, General Disclosure Package and Final Prospectus comply in all material respects with the Act and the Rules and Regulations and present fairly the information shown therein and are based on or derived from sources that the Company reasonably and in good faith believes are reliable and accurate, and such data agree with the sources from which they are derived. All non-GAAP financial information included (or incorporated by reference) in the Registration Statement, General Disclosure Package or Final Prospectus complies in all material respects with the requirements of Regulation G of the Exchange Act and Item 10 of Regulation S-K under the Act, to the extent applicable.

(o) Absence of Defaults and Conflicts Resulting from Transaction. The execution and delivery by the Company and performance by the Company of its obligations under this Agreement, the issuance and sale of the Offered Securities, the application of the proceeds thereof as described under “Use of Proceeds” in the General Disclosure Package and the Final Prospectus, compliance with the terms and provisions thereof and the consummation of the Debt Offering and the application of the proceeds thereof will not conflict with or result in a breach or violation of any of the terms or provisions of, or constitute a default or a Debt Repayment Triggering Event (as defined below) under, or result in the creation or imposition of any lien, charge or encumbrance upon any properties or assets of the Company or any of its Subsidiaries, pursuant to (i) the charter or by-laws of the Company or any of its Subsidiaries, (ii) any statute, any 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) assuming the amendment and restatement to the Revolving Credit Agreement, as described in the General Disclosure Package and the Final Prospectus Supplement, becomes effective, any indenture, mortgage, deed of trust, loan agreement or other 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 or assets of the Company or any of its Subsidiaries is subject, except to such extent as, individually or in the aggregate, does not have a Material Adverse Effect; a “Debt Repayment Triggering Event” means any event or condition that gives, or with the giving of notice or lapse of time would give, the holder of any note, debenture, or other evidence of indebtedness (or any person acting on such holder’s behalf) the right to require the repurchase, redemption or repayment of all or a portion of such indebtedness by the Company or any of its Subsidiaries; provided, however, that neither the Tender Offer nor any agreement to conduct the Tender Offer shall be considered a Debt Repayment Triggering Event.

(p) Absence of Existing Defaults and Conflicts. Neither the Company nor any of its Subsidiaries is, or with the giving of notice or lapse of time or both would be, in default or violation with respect to its certificate of incorporation or by-laws. Neither the Company nor any of its Subsidiaries is in default, and no event has occurred that, with the giving of notice or lapse of time or both would constitute such a default in the performance or observance of any material obligation, agreement, covenant or condition contained in any material indenture, mortgage, deed of trust, loan agreement, lease or other 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 or assets owned by the Company or any of its Subsidiaries is subject, or in violation of any statutes, laws, ordinances or governmental rules or regulations or any orders or decrees to which it is subject, including, without limitation, Section 13 of the Exchange Act, which default or violation, individually or in the aggregate, would have a Material Adverse Effect.

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

(r) Possession of Licenses and Permits. Each of the Company and its Subsidiaries is in possession of and is operating in compliance with all franchises, grants, authorizations, licenses, certificates, permits, easements, consents, orders and approvals (“Permits”) from all state, federal, foreign and other regulatory authorities, and has satisfied the requirements imposed by regulatory bodies, administrative agencies or other governmental bodies, agencies or officials, that are required for the Company and its Subsidiaries lawfully to own, lease and operate their properties and conduct their businesses as described in each of the General Disclosure Package and the Final Prospectus, and each of the Company and its Subsidiaries is conducting its business in compliance with all of the laws, rules and regulations of each jurisdiction in which it conducts its business, in each case with such exceptions, individually or in the aggregate, as would not have a Material Adverse Effect; each of the Company and its Subsidiaries has filed all notices, reports, documents or other information (“Notices”) required to be filed under applicable laws, rules and regulations, in each case, with such exceptions, individually or in the aggregate, as would not have a Material Adverse Effect; and, except as otherwise specifically described in each of the General Disclosure Package and the Final Prospectus, neither the Company nor any of its Subsidiaries has received any notification from any court or governmental body, authority or agency, relating to the revocation or modification of any such Permit or to the effect that any additional authorization, approval, order, consent, license, certificate, permit, registration or qualification (“Approvals”) from such regulatory authority is needed to be obtained by any of them, in any case where it is reasonably expected that obtaining such Approvals or the failure to obtain such Approvals, individually or in the aggregate, would have a Material Adverse Effect.

(s) Taxes. The Company and its Subsidiaries have filed all necessary federal, state and material foreign income and material franchise tax returns required to be filed prior to the date hereof (taking into account extensions requested in good faith by the Company and in compliance with applicable tax rules and regulations) and paid all taxes shown as due thereon; all such tax returns are complete and correct in all material respects; all material tax liabilities are adequately provided for on the books of the Company and its Subsidiaries; and the Company and its Subsidiaries have no knowledge of any tax proceeding or action pending or threatened against the Company or its Subsidiaries that, individually or in the aggregate, might have a Material Adverse Effect.

(t) Absence of Labor Dispute. No labor disturbance exists with the employees of the Company or any of its Subsidiaries or, to the knowledge of the Company, is imminent that, individually or in the aggregate, would have a Material Adverse Effect. None of the employees of the Company or any of its Subsidiaries is represented by a union and, to the knowledge of the Company and its Subsidiaries, no union organizing activities are taking place. Neither the Company nor any of its Subsidiaries has violated any federal, state or local law or foreign law relating to discrimination in hiring, promotion or pay of employees, nor any applicable wage or hour laws, or the rules and regulations thereunder, or analogous foreign laws and regulations, that would, individually or in the aggregate, result in a Material Adverse Effect.

(u) Possession of Intellectual Property. Except as described in each of the General Disclosure Package and the Final Prospectus, the Company and its Subsidiaries own or possess, or can acquire on reasonable terms, adequate patents, patent licenses, trademarks,

service marks and trade names necessary to conduct the business now operated by them, and neither the Company nor any of its Subsidiaries has received any notice of infringement of or conflict with asserted rights of others with respect to any patents, patent licenses, trademarks, service marks or trade names that, individually or in the aggregate, if the subject of an unfavorable decision, ruling or finding, would have a Material Adverse Effect.

(v) Title to Properties. Each of the Company and its Subsidiaries have (i) good and Defensible (as defined below) title to all its interests in its producing natural gas and oil properties (including oil and gas ▇▇▇▇▇, producing leasehold interests and appurtenant personal property) as described in the General Disclosure Package and the Final Prospectus as owned by it, (ii) investigated title in accordance with customary industry procedures prior to acquiring any non-producing leasehold properties (including undeveloped locations or leases held by production, and those leases not held by production and including exploration prospects) described in the General Disclosure Package and the Final Prospectus as owned by it, (iii) good and indefeasible title to its other real property as described in the General Disclosure Package and the Final Prospectus as owned by it and (iv) good title to its personal property as described in the General Disclosure Package and the Final Prospectus as owned by it, in each case free and clear of all liens, claims, security interests, equities, or other encumbrances except those (a) described in each of the General Disclosure Package and the Final Prospectus or (b) that do not materially interfere with the use or value of such properties taken as a whole as described in each of the General Disclosure Package and the Final Prospectus. All real property and buildings held under lease or license by the Company or its Subsidiaries are held under valid and subsisting and enforceable leases or licenses with such exceptions as do not materially interfere with the use of such properties taken as a whole as they have been used in the past and are proposed to be used in the future as described in each of the General Disclosure Package and the Final Prospectus. As used herein, “Defensible” means, with respect to title to the producing properties (including oil and gas ▇▇▇▇▇ and producing leasehold interests) described in the General Disclosure Package and the Final Prospectus as being owned by the Company or its Subsidiaries, that the Company and its Subsidiaries (1) are entitled to receive not less than the net revenue interests of such properties as set forth in the reserve reports of (x) MHA Petroleum Consultants, an independent petroleum engineering firm, dated as of January 23, 2011 and (y) ▇▇▇▇▇▇▇▇ and ▇▇▇▇▇▇▇▇▇▇▇, an independent petroleum engineering firm, dated as of January 17, 2011 (collectively, the “Reserve Reports”) of all hydrocarbons and minerals produced, saved and marketed from such properties, and proceeds thereof, all without reduction, suspension or termination of such interests throughout the productive life of such properties, and (2) are obligated to bear a share of the costs and expenses relating to the maintenance, exploration, drilling, completion, development, operation, plugging and abandonment of such properties not greater than the working interests of such properties as set forth in the Reserve Reports, without increase throughout the life of such properties.

(w) Environmental Laws. Except as described in each of the General Disclosure Package and the Final Prospectus, there is no material pending action, suit or other proceeding involving the Company or any of its Subsidiaries or any of their material assets for any failure of the Company or any of its Subsidiaries, or any predecessor thereof, to comply with any requirements of federal, state or local regulation relating to air, water, solid waste management, hazardous or toxic substances, or the protection of health, safety or the environment. Except as described in each of the General Disclosure Package and the Final Prospectus, none of the property owned or leased by the Company or any of its Subsidiaries is, to the best knowledge of the Company (i) contaminated with waste or hazardous or toxic substances in material amounts or in amounts that pose a threat to employees or visitors, and

(ii) neither the Company nor any of its Subsidiaries may be deemed an “owner or operator” of a “facility” or “vessel” that owns, possesses, transports, generates or disposes of a “hazardous substance” as those terms are defined in §9601 of the Comprehensive Environmental Response, Compensation and Liability Act of 1980, 42 U.S.C. §9601 et seq., which status would result in a Material Adverse Effect.

(x) ERISA. The Company and its Subsidiaries are in compliance in all material respects with all presently applicable provisions of the Employee Retirement Income Security Act of 1974, as amended, including the regulations and published interpretations thereunder (“ERISA”); no “reportable event” (as defined in Section 4043 of ERISA and the regulations thereunder) for which the 30-day notice requirement has not been waived by the Pension Benefit Guarantee Corporation has occurred with respect to any “pension plan” (as defined in ERISA) for which the Company and its Subsidiaries would have any liability; the Company and its Subsidiaries have not incurred and do not expect to incur liability under (i) Title IV of ERISA with respect to termination of, or withdrawal from, any “pension plan” or (ii) Sections 412 or 4971 of the Internal Revenue Code of 1986, as amended, including the regulations and published interpretations thereunder (the “Code”); and each “pension plan” for which the Company or any of its Subsidiaries would have any liability that is intended to be qualified under Section 401(a) of the Code is so qualified in all material respects, and nothing has occurred, whether by action or by failure to act, that would cause the loss of such qualification.

(y) Insurance. The Company and its Subsidiaries maintain insurance of the types and in the amounts generally deemed adequate for its business, including, but not limited to, directors’ and officers’ insurance, insurance covering real and personal property owned or leased by the Company and its Subsidiaries against theft, damage, destruction, acts of vandalism and all other risks customarily insured against, all of which insurance is in full force and effect. Neither the Company nor any of its Subsidiaries has been refused any insurance coverage sought or applied for, and the Company has no reason to believe that it and its Subsidiaries will not be able to renew their 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 have a Material Adverse Effect.

(z) 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, the consummation of the Debt Offering and the application of the proceeds therefrom and the consummation of the Tender Offer, will not be an “investment company” or an entity “controlled” by an “investment company,” as such terms are defined in the Investment Company Act of 1940, as amended.

(aa) Accurate Disclosure. The statements in the General Disclosure Package, the Registration Statement and the Final Prospectus under the captions “Description of Capital Stock,” are accurate and complete in all material respects, and the description of the Offered Securities conforms in all material respects to the description thereof contained in the Registration Statement and the Final Prospectus.

(bb) Absence of Manipulation. The Company has not taken and will not take, directly or indirectly, any action designed to or that might reasonably be expected to cause or result in stabilization or manipulation of the price of the Offered Securities, and the Company is not aware of any such action taken or to be taken by affiliates of the Company

(cc) Internal Controls and Compliance with the ▇▇▇▇▇▇▇▇-▇▇▇▇▇ Act. There is not currently and has not in the past been a failure on the part of the Company or, to the Company’s knowledge, any of its respective directors or officers, in their capacities as such, to comply with any applicable provisions of ▇▇▇▇▇▇▇▇-▇▇▇▇▇ and the rules and regulations promulgated in connection therewith, including Sections 302, 402 and 906, and the statements contained in any certification pursuant to ▇▇▇▇▇▇▇▇-▇▇▇▇▇ and related rules and regulations are complete and correct. The Company has established and maintains disclosure controls and procedures and internal control over financial reporting as are currently required (as such terms are defined in Rule 13a-15 and 15d-15 under the Exchange Act); the Company’s disclosure controls and procedures (A) are designed to ensure that information required to be disclosed by the Company in the reports that it files or submits under the Exchange Act is accumulated and communicated to management, including the principal executive and principal financial officer of the Company, or persons performing similar functions, as appropriate to allow timely decisions regarding required disclosure, and that such information is recorded, processed, summarized and reported, within the time periods specified in the Exchange Act and the Rules and Regulations; (B) have been evaluated for effectiveness; and (C) are effective in all material respects to perform the functions for which they were established. Except as discussed with the Company’s auditors and audit committee and as disclosed in each of the General Disclosure Package and the Final Prospectus, (A) there are no significant deficiencies or material weaknesses in the design or operation of internal control over financial reporting that are reasonably likely to adversely affect the Company’s ability to record, process, summarize, and report financial data and (B) there is, and there has been, no fraud, whether or not material, that involves management or other employees who have a role in the Company’s internal control over financial reporting. Since the date of the end of the last fiscal year for which audited financial statements are included or incorporated by reference in each of the General Disclosure Package and the Final Prospectus, there have been no significant changes in internal control over financial reporting or in other factors that could significantly affect internal control over financial reporting, including any corrective actions with regard to significant deficiencies and material weaknesses.

(dd) Distribution of Offering Materials. The Company has not distributed and, prior to the later of First Closing Date (as defined below) and the Optional Closing Date (as defined below), will not distribute any offering material in connection with the offering and sale of the Offered Securities other than the Registration Statement, any General Use Issuer Free Writing Prospectus identified on Schedule B hereto, the General Disclosure Package and the Final Prospectus.

(ee) SEC Comments. The Company has received no written comments from the SEC staff regarding its periodic or current reports under the Exchange Act that remain unresolved and have not been disclosed in the Registration Statement, General Disclosure Package and Final Prospectus.

(ff) Changes in law. To the best knowledge of the Company, no change in any laws or regulations is pending that could reasonably be expected to be adopted and if adopted, is reasonably expected to have, individually or in the aggregate with all such changes, a Material Adverse Effect, except as set forth in or contemplated in each of the General Disclosure Package and the Final Prospectus.

(gg) Foreign Corrupt Practices Act. Neither the Company nor any of its subsidiaries or affiliates, nor any director, officer, or employee, nor, to the Company’s knowledge, any agent

or representative of the Company or of any of its subsidiaries or affiliates, has taken or will take any action in furtherance of an offer, payment, promise to pay, or authorization or approval of the payment or giving of money, property, gifts or anything else of value, directly or indirectly, to any “government official” (including any officer or employee of a government or government-owned or controlled entity or of a public international organization, or any person acting in an official capacity for or on behalf of any of the foregoing, or any political party or party official or candidate for political office) to influence official action or secure an improper advantage; and the Company and its subsidiaries and affiliates have conducted their businesses in compliance with applicable anti-corruption laws and have instituted and maintain and will continue to maintain policies and procedures designed to promote and achieve compliance with such laws and with the representation and warranty contained herein.

(hh) Money Laundering. The operations of the Company and its subsidiaries are and have been conducted at all times in material compliance with all applicable financial recordkeeping and reporting requirements, including those of the Bank Secrecy Act, as amended by Title III of the Uniting and Strengthening America by Providing Appropriate Tools Required to Intercept and Obstruct Terrorism Act of 2001 (USA PATRIOT Act), and the applicable anti-money laundering statutes of jurisdictions where the Company and its subsidiaries conduct business, the rules and regulations thereunder and any related or similar rules, regulations or guidelines, issued, administered or enforced by any governmental agency (collectively, the “Anti-Money Laundering Laws”), and no action, suit or proceeding by or before any court or governmental agency, authority or body or any arbitrator involving the Company or any of its subsidiaries with respect to the Anti-Money Laundering Laws is pending or, to the best knowledge of the Company, threatened.

(ii) OFAC. (i) The Company represents that neither the Company nor any of its subsidiaries, nor any director, officer, or employee thereof, nor, to the Company’s knowledge, any agent, affiliate or representative of the Company or any of its subsidiaries, is an individual or entity (“Person”) that is, or is owned or controlled by a Person that is:

(A) the subject of any sanctions administered or enforced by the U.S. Department of Treasury’s Office of Foreign Assets Control (“OFAC”) (collectively, “Sanctions”), nor

(B) located, organized or resident in a country or territory that is the subject of Sanctions (including, without limitation, Burma/Myanmar, Cuba, Iran, North Korea, Sudan and Syria).

(ii) The Company represents and covenants that it will not, directly or indirectly, use the proceeds of the offering, or lend, contribute or otherwise make available such proceeds to any subsidiary, joint venture partner or other Person:

(A) to fund or facilitate any activities or business of or with any Person or in any country or territory that, at the time of such funding or facilitation, is the subject of Sanctions; or

(B) in any other manner that will result in a violation of Sanctions by any Person (including any Person participating in the offering, whether as underwriter, advisor, investor or otherwise).

(iii) The Company represents and covenants that for the past 5 years, it and its subsidiaries have not knowingly engaged in, are not now knowingly engaged in, and will not engage in, any dealings or transactions with any Person, or in any country or territory, that at the time of the dealing or transaction is or was the subject of Sanctions.

(jj) Certificates. Any certificate signed by any officer of the Company or any of its Subsidiaries and delivered to the Underwriter or to counsel for the Underwriter shall be deemed a representation and warranty by the Company to the Underwriter as to the matters covered thereby.

(kk) Independent Engineer. Each of MHA Petroleum Consultants, Inc. (“MHA”) and ▇▇▇▇▇▇▇▇ and ▇▇▇▇▇▇▇▇▇▇▇ (“DGM”) is a petroleum engineering firm from whose reserve reports information is contained or incorporated by reference in the Registration Statement, the General Disclosure Package and the Final Prospectus, and acts as independent petroleum engineers with respect to the Company. Other than (i) the production of reserves in the ordinary course of business, (ii) intervening price fluctuations or (iii) as described in the General Disclosure Package and the Final Prospectus, the Company is not aware of any facts or circumstances that would result in a material adverse change in its proved reserves in the aggregate, or the aggregate present value of estimated future net revenues of the Company or the standardized measure of discounted future net cash flows therefrom, as described in the General Disclosure Package and the Final Prospectus and reflected in the reserve information as of the respective dates such information is given. Except as described in each of the General Disclosure Package and the Final Prospectus, the General Disclosure Package, including the oil and natural gas production and reserve information and estimates of future net revenues and discounted future net cash flows, complies and the Final Prospectus, including the oil and natural gas production and reserve information and estimates of future net revenues and discounted future net cash flows, will comply, in all material respects with the applicable requirements of Regulation S-X, Industry Guide 2 under the Act and Statement of Financial Accounting Standards Board No. 69, Disclosures about Oil and Petroleum Producing Activities, as amended to date.

(ll) Litigation. Other than as set forth in each of the General Disclosure Package and the Final Prospectus, there are no legal or governmental proceedings pending to which the Company or any of its Subsidiaries is a party or of which any property of the Company or any of its Subsidiaries is the subject that, if determined adversely to the Company or any of its Subsidiaries, would individually or in the aggregate have a Material Adverse Effect or that would materially and adversely affect the consummation of the transactions contemplated hereby or that is required to be disclosed in each of the General Disclosure Package or the Final Prospectus; to the Company’s knowledge, no such proceedings are threatened or contemplated.

(mm) Ratings. No “nationally recognized statistical rating organization” as such term is defined for purposes of Rule 436(g)(2) (i) has imposed (or has informed the Company that it is considering imposing) any condition (financial or otherwise) on the Company’s retaining any rating assigned to the Company or any securities of the Company or (ii) has indicated to the Company that it is considering any of the actions described in Section 7(c)(ii) hereof.

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 agrees to sell to the several Underwriters, and each of the Underwriters agrees, severally and not jointly, to purchase from the Company, at a purchase price of $4.44125 per share, the respective number of shares of Firm Securities set forth opposite the names of the Underwriters in Schedule A hereto.

The Company 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 by the Underwriters in Federal (same day) funds by wire transfer to an account at a bank acceptable to the Representatives drawn to the order of the Company at the office of ▇▇▇▇▇ ▇▇▇▇ & ▇▇▇▇▇▇▇▇ LLP, ▇▇▇ ▇▇▇▇▇▇▇▇▇ ▇▇▇▇▇▇, ▇▇▇ ▇▇▇▇, ▇▇▇ ▇▇▇▇ ▇▇▇▇▇ at 9:30 A.M., New York time, on February 9, 2011, 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 Exchange Act, 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. The Firm Securities so to be delivered or evidence of their issuance will be made available for checking at the above office at least 24 hours prior to the First Closing Date.

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 share of Common Stock to be paid for the Firm Securities. The Company agrees to sell to the Underwriters the number of shares 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 shares of Firm Securities set forth opposite such Underwriter’s name in Schedule A hereto bears to the total number of shares of Firm Securities (subject to adjustment by the Representatives to eliminated 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.

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”), 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 wire transfer to an account at a bank acceptable to the Representatives drawn to the order of the Company, at the above office. The Optional Securities being purchased on each Optional Closing Date or evidence of their issuance will be made available for checking at the above office at a reasonable time in advance of such Optional Closing Date.

The Firm Securities and Optional Securities shall be registered in such names and in such denominations as the Representatives shall request in writing not later than one full business day prior to the Closing Date or the applicable Option Closing Date, as the case may

be. The Firm Securities and Optional Securities shall be delivered to the Representatives on the Closing Date or an Option Closing Date, as the case may be, for the respective accounts of the several Underwriters. The purchase price payable by the Underwriters shall be reduced by (i) any transfer taxes paid by, or on behalf of, the Underwriters in connection with the transfer of the Offered Securities to the Underwriters duly paid and (ii) any withholding required by law.

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. The Company agrees with the several Underwriters that:

(a) Filing of Prospectuses. The Company has filed or will file each Statutory Prospectus (including the Final Prospectus) pursuant to and in accordance with Rule 424(b)(2) (or, if applicable and consented to by the Representatives, subparagraph (5)) not later than the second business day following the earlier of the date it is first used or the execution and delivery of this Agreement. The Company has complied and will comply with Rule 433.

(b) Filing of Amendments; Response to Commission Requests. The Company will promptly advise the Representatives of any proposal to amend or supplement the Registration Statement or any Statutory Prospectus at any time and will offer the Representatives a reasonable opportunity to comment on any such amendment or supplement; and the Company will also advise the Representatives promptly of (i) the filing of any such amendment or supplement, (ii) any request by the Commission or its staff for any amendment to the Registration Statement, for any supplement to any Statutory Prospectus or for any additional information, (iii) the institution by the Commission of any stop order proceedings in respect of the Registration Statement or the threatening of any proceeding for that purpose, and (iv) 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 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 16 months, after the date of this Agreement, the Company will make generally available to its securityholders an earnings statement covering a period of at least 12 months beginning after the date of this Agreement and satisfying the provisions of Section 11(a) of the Act and Rule 158.

(e) Furnishing of Prospectuses. The Company will furnish to the Representatives copies of the Registration Statement, including all exhibits, any Statutory Prospectus, the Final Prospectus and all amendments and supplements to such documents, in each case as soon as available and in such quantities as the Representatives reasonably request. The Company will pay the expenses of printing and distributing to the Underwriters all such documents.

(f) Blue Sky Qualifications. The Company will arrange for the qualification of the Offered Securities for sale under the laws of such jurisdictions as the Representatives designate and will continue such qualifications in effect so long as required for the distribution.

(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 will pay all expenses incident to the performance of its obligations under this Agreement, including but not limited to any filing fees and other expenses (including reasonable fees and disbursements of counsel to the Underwriters) incurred in connection with qualification of the Offered Securities for sale under the laws of such jurisdictions as the Representatives designate and the preparation and printing of memoranda relating thereto, costs and expenses related to the review by FINRA of the Offered Securities, if applicable, (including filing fees and the fees and expenses of counsel for the Underwriters relating to such review), costs and expenses 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 the chartering of airplanes, fees and expenses incident to listing the Offered Securities on the New York Stock Exchange, American Stock Exchange, NASDAQ Stock Market and other national and foreign exchanges, fees and expenses in connection with the registration of the Offered Securities under the Exchange Act, and expenses incurred in distributing preliminary prospectuses and the Final Prospectus (including any amendments and supplements thereto) to the Underwriters and for expenses incurred for preparing, printing and distributing any Issuer Free Writing Prospectuses to investors or prospective investors.

(i) Use of Proceeds. The Company will use the net proceeds received in connection with this offering in the manner described in the “Use of Proceeds” section of the General Disclosure Package and, except as disclosed in the General Disclosure Package, 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 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.

(k) Restriction on Sale of Securities. 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 Common Stock, or any securities convertible into or exchangeable or exercisable for any of its Common Stock (“Lock-Up Securities”): (i) offer, sell, issue, contract to sell, pledge or otherwise dispose of Lock-Up Securities, (ii) offer, sell, issue, contract to sell, contract to purchase or grant any option, right or warrant to purchase Lock-Up Securities, (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, in each case, the prior written consent of the Representatives, except

(A) the issuances of the Offered Securities to the Underwriters under this Agreement;

(B) 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 as described in the General Disclosure Package and Final Prospectus;

(C) transactions relating to the issuance of Lock-Up Securities or other securities acquired in open market transactions after the completion of the offering of the Offered Securities; provided that no filing under Section 16(a) of the Exchange Act is required or will be voluntarily made in connection with subsequent sales of Common Stock or other securities acquired in such open market transactions;

(D) transfers of the Lock-Up Securities or any other security convertible into shares of the Company’s Common Stock as a bona fide gift; provided that each donee enters into a written agreement accepting the same lock-up restrictions as if it were the entity or individual originally subject to the lock-up agreement in the form attached hereto as Exhibit A-3 and no filing under Section 16(a) of the Exchange Act reporting a reduction in beneficial ownership of shares of Common Stock is required or will be voluntarily made in respect of the transfer or distribution during the Lock-Up Period (other than a filing on Form 5 made after the expiration of the Lock-Up Period);

(E) the filing by the Company of a registration statement with the Commission on Form S-8 in respect of any Lock-Up Securities issued under or the grant of any award pursuant to an employee benefit plan in effect on the date of this on the date hereof and as described in the General Disclosure Package and Final Prospectus or issuances of Lock-Up Securities pursuant to the exercise of such options;

(F) issuances of Lock-Up Securities by the Company as described in the General Disclosure Package and Final Prospectus, and the filing by the Company of a registration statement with the Commission on Form S-3 in respect of the resale of such Lock-Up Securities, to be issued to Retamco Operating, Inc. in accordance with a pending acquisition;

(G) issuances of Lock-Up Securities by the Company as described in the General Disclosure Package and Final Prospectus, and the filing by the Company of a registration statement with the SEC on Form S-3 in respect of the resale of such Lock-Up Securities as payment by the Company of any part of the purchase price for the other Acquisitions (as such term is defined in the General Disclosure Package and Final Prospectus under the heading “Recent Developments”); provided that prior to the filing of such registration statement, the sellers shall have agreed not to sell any such Lock-Up Securities during the Lock-Up Period; and

(H) the establishment of a trading plan pursuant to Rule 10b5-1 under the Exchange Act for the transfer of Lock-Up Securities; provided that such plan does not provide for the transfer of Lock-Up Securities during the Lock-Up Period and no public announcement or filing under the Exchange Act regarding the establishment of such plan is required of or voluntarily made by or on behalf of the Company.

The initial Lock-Up Period will commence on the date hereof and continue for 90 days after the date hereof or such earlier date that the Representatives consent to in writing; provided, however, that if (1) during the last 17 days of the initial Lock-Up Period, the Company releases earnings results or material news or a material event relating to the Company occurs or (2) prior to the expiration of the initial Lock-Up Period, the Company announces that it will release earnings results during the 16-day period beginning on the last day of the initial Lock-Up Period, then in each case the Lock-Up Period will be extended until the expiration of the 18-day period beginning on the date of release of the earnings results or the occurrence of the materials news or material event, as applicable, unless the Representatives waive, in writing, such extension. The Company will provide the Representatives with notice of any announcement described in clause (2) of the preceding sentence that gives rise to an extension of the Lock-Up Period.

6. Free Writing Prospectuses. (a) Issuer Free Writing Prospectuses. The Company represents and agrees that, unless it obtains 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 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.

(b) Term Sheets. The Company will prepare a final term sheet relating to the Offered Securities, containing only information that describes the final terms of the Offered Securities, and otherwise in a form consented to by the Representatives, and will file such final term sheet within the period required by Rule 433(d)(5)(ii) following the date such final terms have been established for all classes of the offering of the Offered Securities. Any such final term sheet is an Issuer Free Writing Prospectus and a Permitted Free Writing Prospectus for purposes of this Agreement. The Company also consents to the use by any Underwriter of a free writing prospectus that contains only (i)(x) information describing the preliminary terms of the Offered Securities or their offering or (y) information that describes the final terms of the Offered Securities or their offering and that is

included in the final term sheet of the Company contemplated in the first sentence of this subsection or (ii) other information that is not “issuer information,” as defined in Rule 433, it being understood that any such free writing prospectus referred to in clause (i) or (ii) above shall not be an Issuer Free Writing Prospectus for purposes of this Agreement.

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 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 of its obligations hereunder and to the following additional conditions precedent:

(a) Accountants’ Comfort Letters. The Representatives shall have received letters, dated, respectively, the date hereof and each Closing Date, from each of ▇▇▇▇▇ ▇▇▇▇▇▇▇▇ LLP and ▇▇▇▇▇ ▇▇▇▇▇▇ & Co., each confirming that they are a registered public accounting firm and independent public accountants within the meaning of the Securities Laws and substantially in the form of Exhibit A-4 and Exhibit A-5, respectively, hereto (except that, in any letter dated a Closing Date, the specified date referred to in Exhibit A-4 and A-5 hereto shall be a date no more than three days prior to such Closing Date).

(b) Filing of Prospectus. The Final Prospectus shall have been filed with the Commission in accordance with the Rules and Regulations and Section 5(a) hereof. No stop order suspending the effectiveness of the Registration Statement or of any part thereof shall have been issued and no proceedings for that purpose shall have been instituted or, to the knowledge of the Company or any Underwriter, shall be contemplated by the Commission.

(c) 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 or preferred stock of the Company by any “nationally recognized statistical rating organization” (as defined for purposes of Rule 436(g) under the Act), or any public announcement that any such organization has under surveillance or review its rating of any debt securities or preferred stock 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 NASDAQ Stock Market, or any setting of minimum or maximum prices for trading on such exchanges; (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 in the judgment of the Representatives impractical or inadvisable to market the Offered Securities or to enforce contracts for the sale of the Offered Securities.

(d) Opinion and 10b-5 Statement of Counsel for Company. The Representatives shall have received from (i) ▇▇▇▇▇▇▇ ▇▇▇▇▇ LLP, special counsel for the Company an opinion and negative assurance, dated the Closing Date, in the form attached hereto as Exhibit A-1 and (ii) ▇▇▇▇▇ & ▇▇▇▇▇▇▇, A Professional Corporation, Oklahoma counsel for the Company an opinion, dated the Closing Date in the form attached hereto as Exhibit A-2.

(e) Opinion and 10b-5 Statement of Counsel for Underwriters. The Representatives shall have received from ▇▇▇▇▇ ▇▇▇▇ & ▇▇▇▇▇▇▇▇ LLP, counsel for the Underwriters, such opinion or opinions and negative assurance letter, dated such Closing Date, with respect to such matters as the Representatives may require, 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. In rendering such opinion, ▇▇▇▇▇ ▇▇▇▇ & ▇▇▇▇▇▇▇▇ LLP may rely as to the incorporation of the Company and all other matters governed by Oklahoma law upon the opinion of ▇▇▇▇▇ & ▇▇▇▇▇▇▇ referred to above.

(f) 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 the Registration Statement has been issued and no proceedings for that purpose have been instituted or, to the best of their knowledge, are contemplated by the Commission; and, subsequent to the respective dates of the most recent financial statements in the General Disclosure Package, 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 or as described in such certificate.

(g) Engineering Firms Letters. At the time of execution of this Agreement and each Closing Date, the Underwriter shall have received from each of MHA and DGM, a letter, in form and substance satisfactory to and addressed to the Underwriters with respect to: (i) the estimated quantities of the Company’s proved net reserves, (ii) the future net revenues from those reserves, (iii) their present value as set forth in the General Disclosure Package and the Final Prospectus and (iv) such related matters as the Underwriter shall reasonably request.

(h) Good Standing. The Representatives shall have received on and as of the Closing Date satisfactory evidence of the good standing of the Company and its subsidiaries in their respective jurisdictions of organization and its good standing in such other jurisdictions as the Representatives may reasonably request, in each case in writing or any standard form of telecommunication, from the appropriate governmental authorities of such jurisdictions.

(i) Lock-Up Agreements. The “lock up” agreements, each substantially in the form of Exhibit A-3 hereto, between you and certain shareholders, officers and directors of the

Company relating to sales and certain other dispositions of shares of Common Stock or certain other securities, delivered to you on or before the date hereof, shall be in full force and effect on the Closing Date.

(j) Concurrent Debt Offering. The successful closing of the Debt Offering shall have been consummated substantially concurrently with the closing of the Offered Securities.

(k) Amendment and Restatement of Revolving Credit Agreement. On or prior to the First Closing Date, the amendment and restatement to the existing Revolving Credit Agreement shall have become effective.

(l) Chief Financial Officer’s Certificate. The Representatives shall have received a certificate of the Chief Financial Officer of the Company, dated as of the date hereof and as of the Closing Date, in the form attached hereto as Exhibit A-6.

The Company will furnish the Representatives with such conformed copies of such opinions, certificates, letters and documents as the Representatives reasonably request. 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. 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 the 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, preparing 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 (b) below.

(b) Indemnification of Company. 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 (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, 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 the 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 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: the concession figures appearing in the twelfth paragraph under the caption “Underwriters” and ninth and tenth paragraphs under the caption “Plan of Distribution.”

(c) 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 the indemnifying party under subsection (a) or (b) 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) or (b) 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) or (b) above. In case any such action is brought against any indemnified party and it notifies the 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. In any such proceeding, any indemnified party shall have the right to retain its own counsel, but the fees and expenses of such counsel shall be at the expense of such indemnified party unless 1) the indemnifying party and the indemnified party shall have mutually agreed to the retention of such counsel or 2) the named parties to any such proceeding (including any impleaded parties) include both the indemnifying party and the indemnified party and representation of both parties by the same counsel would be inappropriate due to actual or potential differing interests between them. It is understood that the indemnifying party shall not, in respect of the legal expenses of any indemnified party in connection with any proceeding or related proceedings in the same jurisdiction, be liable for (i) the fees and expenses of more than one separate firm (in addition to any local counsel) for all Underwriters and all persons, if any, who control any Underwriter within the meaning of either Section 15 of the Securities Act or Section 20 of the Exchange Act or who are affiliates

of any Underwriter within the meaning of Rule 405 under the Securities Act and (ii) the fees and expenses of more than one separate firm (in addition to any local counsel) for the Company, its directors, its officers who sign the Registration Statement and each person, if any, who controls the Company within the meaning of either such Section, and that all such fees and expenses shall be reimbursed as they are incurred. In the case of any such separate firm for the Underwriters and such control persons and affiliates of any Underwriters, such firm shall be designated in writing by the Representatives. In the case of any such separate firm for the Company, and such directors, officers and control persons of the Company, such firm shall be designated in writing by the Company. 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.

(d) Contribution. If the indemnification provided for in this Section is unavailable or insufficient to hold harmless an indemnified party under subsection (a) or (b) 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) or (b) above (i) in such proportion as is appropriate to reflect the relative benefits received by the Company on the one hand and the Underwriters on the other from the offering of the Offered 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 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 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 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 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 (d) 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 (d). Notwithstanding the provisions of this subsection (d), no Underwriter shall be required to contribute any amount in excess of the amount by which the total price at which the Offered 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 (d) to contribute are several in proportion to their respective underwriting obligations and not joint. The Company and the Underwriters agree that it would not be just and equitable if contribution pursuant to this Section 8(d) 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(d).

9. Default of Underwriters. If any Underwriter or Underwriters default in their obligations to purchase Offered Securities hereunder on either the First 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 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 and the Company 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 or the Company, 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 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, 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 clauses (vii) and (viii) of Section 7(c) hereof, the Company will reimburse the Underwriters for all out-of-pocket expenses (including 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 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, delivered or telegraphed and confirmed to the ▇▇▇▇▇▇ ▇▇▇▇▇▇▇ & Co. Incorporated, ▇▇▇▇ ▇▇▇▇▇▇▇▇, ▇▇▇ ▇▇▇▇, ▇▇▇ ▇▇▇▇ ▇▇▇▇▇, Attention: Equity Syndicate Desk, with a copy to the Legal Department and to Credit Suisse Securities (USA) LLC at Eleven Madison Avenue, New York, N.Y. 10010-3629, Attention: LCD-IBD, or, if sent to the Company, will be mailed, delivered or telegraphed and confirmed to it at GMX Resources Inc., ▇▇▇▇ ▇▇▇▇▇ ▇▇▇▇▇▇▇▇, ▇▇▇▇▇ ▇▇▇, ▇▇▇▇▇▇▇▇ ▇▇▇▇, ▇▇▇▇▇▇▇▇ ▇▇▇▇▇, Attention: Chief Financial Officer; provided, however, that any notice to an Underwriter pursuant to Section 8 will be mailed, delivered or telegraphed 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 successors and the officers and directors and controlling persons referred to in Section 8, 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 this financing, and any action under this Agreement taken by the Representatives 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 acknowledges and agrees that:

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

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

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

(d) Waiver. The Company waives, to the fullest extent permitted by law, any claims it may have against the Representatives for breach of fiduciary duty or alleged breach of fiduciary duty and agrees that the Representatives shall have no liability (whether direct or indirect) to the Company 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 Borough of Manhattan 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.

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


Very truly yours,

	GMX RESOURCES INC.

	By:	/s/ ▇▇▇▇▇ ▇. ▇▇▇▇▇▇▇
		Name: ▇▇▇▇▇ ▇. ▇▇▇▇▇▇▇
		Title: Chief Financial Officer


The foregoing Underwriting Agreement is hereby confirmed and accepted as of the date first above written.

Acting severally on behalf of themselves and as the Representatives of the several Underwriters named in Schedule A hereto.


		CREDIT SUISSE SECURITIES (USA) LLC

		By:		/s/ ▇▇▇▇▇▇ ▇▇▇▇▇▇▇▇▇▇
				Name: ▇▇▇▇▇▇ ▇▇▇▇▇▇▇▇▇▇
				Title: MDR

		▇▇▇▇▇▇ ▇▇▇▇▇▇▇ & CO. INCORPORATED

		By:		/s/ ▇▇▇▇▇▇ ▇▇▇▇▇▇▇▇
				Name: ▇▇▇▇▇▇ ▇▇▇▇▇▇▇▇
				Title: Vice President

SCHEDULE A


Underwriter	Number of Securities of Firm Securities

▇▇▇▇▇▇ ▇▇▇▇▇▇▇ & Co. Incorporated		8,851,500

Credit Suisse Securities (USA) LLC		5,901,000

Capital One Southcoast, Inc.		3,161,250

▇▇▇▇▇▇▇▇▇ Capital Partners, LLC		1,159,124

▇▇▇▇▇▇▇ ▇▇▇▇ and Company L.L.C.		1,001,063

▇▇▇▇▇▇ ▇▇▇▇ Incorporated		1,001,063

Total		21,075,000

SCHEDULE B

1.	General Use Free Writing Prospectuses (included in the General Disclosure Package)

“General Use Issuer Free Writing Prospectus” includes each of the following documents:

1. Free Writing Prospectus announcing Five Oil Resource Acreage Acquisitions Totaling 67,724 Net Acres in ▇▇▇▇▇▇ and Niobrara Development Cores; Completed Year-End Reserves, which includes Removal of Cotton Valley Undeveloped Reserves to Focus on New Oil Opportunities; Liquidity and Financial Update and 2011 Production Guidance, filed on January 28, 2011

2. Final term sheet, dated February 4, 2011, a copy of which is attached hereto.

2.	Other Information Included in the General Disclosure Package

None

FINAL TERM SHEET


Pricing Term Sheet		Filed pursuant to Rule 433
dated February 4, 2011		Registration File No. 333-171521
		Supplementing the Preliminary
		Prospectus Supplement
		dated January 28, 2011
		(To Prospectus dated January 14, 2011)

GMX Resources Inc.

Offering of 21,075,000 shares of common stock,

par value $0.001 per share (the “Common Stock Offering”)

The information in this pricing term sheet relates only to the Common Stock Offering and should be read together with (i) the preliminary prospectus supplement dated January 28, 2011 relating to the Common Stock Offering, including the documents incorporated by reference therein and (ii) the related base prospectus dated January 14, 2011, filed pursuant to Rule 424(b) under the Securities Act of 1933, as amended, Registration Statement No. 333-171521.

Issuer:

GMX Resources Inc. (the “Issuer”)

Ticker / Exchange for Common Stock:

GMXR / The New York Stock Exchange (the
“NYSE”).

Trade Date:

February 4, 2011

Settlement Date:

February 9, 2011.

Title of Securities:

Common stock, par value $0.001 per share, of the
Issuer.

Shares Offered and Sold:

21,075,000 (or a total of 24,236,250 if the underwriters’
over-allotment option to purchase up to 3,161,250
additional shares of the Issuer’s common stock is
exercised in full).

Public Offering Price per Share:

$4.75 per share / approximately $100,106,250 total (or
approximately $115,122,187.50 total if the
underwriters’ option to purchase up to 3,161,250
additional shares of the Issuer’s common stock is
exercised in full).

Use of Proceeds:

The Issuer expects the net proceeds to it from the
Common Stock Offering, after deducting underwriting
discounts and commissions and estimated expenses of
the Common Stock Offering payable by the Issuer, to
be approximately $93.3 million (or approximately
$107.3 million if the underwriters exercise their option
to purchase additional shares in full). The Issuer intends
to use the net proceeds from the Common Stock
Offering and the Notes Offering (as defined below)
(i) to fund an offer to purchase up to $50.0 million of its
5.00% convertible senior notes due 2013, (ii) to repay
the current outstanding balance under its secured
revolving credit facility, (iii) to fund the cash portion of
the purchase price of pending acquisitions of
undeveloped oil and gas leases for approximately $68.3
million, (iv) to fund its exploration and development
program and (v) for other general corporate purposes.

Commissions and Discounts:

The underwriters have advised the Issuer that they
propose to offer the shares of the Issuer’s common
stock initially at the Public Offering Price per Share and
to selling group members at that price less a selling
concession of $0.18525 per share of common stock.

The following table summarizes the compensation and
estimated expenses that the Issuer will pay:

Per Share

Total

Without
Over-
allotment

With
Over-
allotment

Without
Over-
allotment

With
Over-
allotment

Underwriting Discounts and Commissions paid by the Issuer

0.30875

6,506,906.25

7,482,942.19

Expenses payable by the Issuer

0.01

300,000


Joint Book-Running Managers:		▇▇▇▇▇▇ ▇▇▇▇▇▇▇ & Co. Incorporated and Credit Suisse Securities (USA) LLC

Co-Managers:		Capital One Southcoast, Inc., ▇▇▇▇▇▇▇▇▇ Capital Partners, LLC, ▇▇▇▇▇▇ ▇▇▇▇ Incorporated and ▇▇▇▇▇▇▇ Rice & Company L.L.C.

Concurrent Notes Offering:		Concurrent with this Common Stock Offering, the Issuer is conducting, under a separate offering circular, a non-public offering of $200.0 million aggregate principal amount of its 11.375% Senior Notes due 2019 (the “Notes Offering”), at a price of 96.833%, plus accrued interest, if any, from February 9, 2011. The Issuer expects the net proceeds to it from the Notes Offering, after deducting initial purchaser’s discounts and commissions and estimated expenses of the Notes Offering payable by it to be approximately $186.8 million.

The Issuer has filed a registration statement (including a preliminary prospectus supplement dated January 28, 2011 and an accompanying prospectus dated January 14, 2011) with the Securities and Exchange Commission, or SEC, for the offerings to which this communication relates. Before you invest, you should read the preliminary prospectus supplement, the accompanying prospectus and the other documents the Issuer has filed with the SEC for more complete information about the Issuer and the offerings. You may get these documents for free by visiting ▇▇▇▇▇ on the SEC web site at ▇▇▇.▇▇▇.▇▇▇. Alternatively, copies may be obtained from ▇▇▇▇▇▇ ▇▇▇▇▇▇▇ & Co. Incorporated, ▇▇▇ ▇▇▇▇▇▇ ▇▇▇▇▇▇, ▇▇▇ ▇▇▇▇, ▇▇▇ ▇▇▇▇ ▇▇▇▇▇, Attention: Prospectus Department; e-mail: ▇▇▇▇▇▇▇▇▇▇@▇▇▇▇▇▇▇▇▇▇▇▇▇.▇▇▇; toll-free 1-866-718-1649 or from Credit Suisse Securities (USA) LLC, ▇▇▇▇▇▇▇▇▇▇ ▇▇▇▇▇▇▇▇▇▇, ▇▇▇ ▇▇▇▇▇▇▇ ▇▇▇▇▇▇, ▇▇▇ ▇▇▇▇, ▇▇▇ ▇▇▇▇ ▇▇▇▇▇, toll-free 1 (800) 221-1037.

This communication should be read in conjunction with the preliminary prospectus supplement dated January 28, 2011 and the accompanying prospectus. The information in this communication supersedes the information in the preliminary prospectus supplement and the accompanying prospectus to the extent inconsistent with the information in the preliminary prospectus supplement and the accompanying prospectus.

ANY DISCLAIMERS OR OTHER NOTICES THAT MAY APPEAR BELOW ARE NOT APPLICABLE TO THIS COMMUNICATION AND SHOULD BE DISREGARDED. SUCH DISCLAIMERS OR OTHER NOTICES WERE AUTOMATICALLY GENERATED AS A RESULT OF THIS COMMUNICATION BEING SENT VIA BLOOMBERG OR ANOTHER EMAIL SYSTEM.

SCHEDULE C

List of Subsidiaries

Diamond Blue Drilling Co.

Endeavor Pipeline Inc.

Endeavor Gathering LLC

Exhibit A-3

Form of Lock-Up Letter

GMX Resources Inc.

▇▇▇▇▇▇ ▇▇▇▇▇▇▇ & CO. INCORPORATED

CREDIT SUISSE SECURITIES (USA) LLC,

As Representatives of the Several Underwriters

named in Schedule A to the Underwriting Agreement,

c/o Morgan ▇▇▇▇▇▇▇ & Co. Incorporated

▇▇▇▇ ▇▇▇▇▇▇▇▇

▇▇▇ ▇▇▇▇, ▇▇▇ ▇▇▇▇ ▇▇▇▇▇

c/o Credit Suisse Securities (USA) LLC

Eleven ▇▇▇▇▇▇▇ ▇▇▇▇▇▇

▇▇▇ ▇▇▇▇, ▇▇▇ ▇▇▇▇ ▇▇▇▇▇

Dear Sirs:

As an inducement to the Underwriters to execute the Underwriting Agreement (the “Underwriting Agreement”) dated February 4, 2011 between you and GMX Resources Inc. (the “Company”), pursuant to which an offering will be made that is intended to result in an orderly market for 21,075,000 shares of common stock, par value $0.001 per share (the “Offered Securities”), of the Company (and up to an additional 3,161,250 shares of common stock of the Company, at the option of the Underwriters), the undersigned hereby agrees that during the period specified in the following paragraph (the “Lock-Up Period”), the undersigned will not, directly or indirectly, take any of the following actions with respect to any shares of common stock of the Company, par value $0.001 per share (“Common Stock”) or securities convertible into or exchangeable or exercisable for any Common Stock (the “Lock-Up Securities”): (i) offer, sell, issue, contract to sell, pledge or otherwise dispose of Lock-Up Securities, (ii) offer, sell, issue, contract to sell, contract to purchase or grant any option, right or warrant to purchase Lock-Up Securities, (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 Securities and Exchange Act of 1034, as amended (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, in each case, the prior written consent of ▇▇▇▇▇▇ ▇▇▇▇▇▇▇ & Co. Incorporated and Credit Suisse Securities (USA) LLC (collectively, the “Representatives”), except: (A) transactions relating to the issuance of Lock-Up Securities or other securities acquired in open market transactions after the completion of the offering of the Offered Securities; provided that no filing under Section 16(a) of the Exchange Act is required or will be voluntarily made in connection with subsequent sales of Common Stock or other securities acquired in such open market transactions; (B) transfers of the Lock-Up Securities or any other security convertible into shares of the Company’s Common Stock as a bona fide gift; provided that each donee enters into a written agreement accepting the same lock-up restrictions as if it were the entity or individual originally subject to this lock-up agreement and no filing under Section 16(a) of the Exchange Act reporting a reduction in beneficial ownership of shares of Common Stock is required or will be voluntarily made in respect of the transfer or distribution during the Lock-Up Period (other than a filing on Form 5 made after the expiration of the Lock-Up Period); and (C) the establishment of a trading plan pursuant to Rule 10b5-1 under the Exchange Act for the transfer of Lock-Up Securities; provided that such plan does not provide for the transfer of Lock-Up Securities during the Lock-Up Period and no public announcement or filing under the Exchange Act regarding the establishment of such plan is required of or voluntarily made by or on behalf of the Company or the undersigned.

The initial Lock-Up Period will commence on the date of this Lock-Up Agreement and continue and include the date 90 days after the public offering date set forth on the final prospectus used to sell the Offered Securities (the “Public Offering Date”) pursuant to the Underwriting Agreement, to which you are or expect to become parties; provided, however, that if (1) during the last 17 days of the initial Lock-Up Period, the Company releases earnings results or material news or a material event relating to the Company occurs or (2) prior to the expiration of the initial Lock-Up Period, the Company announces that it will release earnings results during the 16-day period beginning on the last day of the initial Lock-Up Period, then in each case the Lock-Up Period will be extended until the expiration of the 18-day period beginning on the date of release of the earnings results or the occurrence of the material news or material event, as applicable, unless the Representatives waive, in writing, such extension.

The undersigned agrees that, prior to engaging in any transaction or taking any other action that is subject to the terms of this Lock-Up Agreement during the period from the date of this Lock-Up Agreement to and including the 34^th day following the expiration of the initial Lock-Up Period, it will give notice thereof to the Company and will not consummate such transaction or take any such action unless it has received written confirmation from the Company that the Lock-Up Period (as may have been extended pursuant to the previous paragraph) has expired.

Any Common Stock received upon exercise of options granted to the undersigned will also be subject to this Agreement.

Capitalized terms used but not defined herein shall have the meaning assigned to such terms in the Underwriting Agreement.

In furtherance of the foregoing, the Company and its transfer agent and registrar are hereby authorized to decline to make any transfer of Common Stock if such transfer would constitute a violation or breach of this Agreement.

This Agreement shall be binding on the undersigned and the successors, heirs, personal representatives and assigns of the undersigned. This Agreement shall lapse and become null and void if the Public Offering Date shall not have occurred on or before May 4, 2011. This agreement shall be governed by, and construed in accordance with, the laws of the State of New York.

Very truly yours,

Name:

Title:

GMX RESOURCES INC. 21,075,000 Shares of Common Stock UNDERWRITING AGREEMENT

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