Document:

Form of Restricted Stock Unit Award Agreement

 Exhibit 10.1 
 AVI BIOPHARMA, INC. 
 2011 EQUITY INCENTIVE PLAN 

RESTRICTED STOCK UNIT AWARD AGREEMENT 
 Unless otherwise defined herein, the terms defined in the AVI BioPharma, Inc. 2011 Equity Incentive Plan (the “Plan”) will have the same defined meanings in this Restricted Stock Unit Award
Agreement (the “Award Agreement”). 
  

	I.	NOTICE OF RESTRICTED STOCK UNIT GRANT 

 Participant Name: 
 Address: 

You have been granted the right to receive an Award of Restricted Stock Units, subject to the terms and conditions of the Plan and this
Award Agreement, as follows: 
  

					
	 Grant Number
	 	  
	 	
			
	 Date of Grant
	 	  
	 	
			
	 Vesting Commencement Date
	 	  
	 	
			
	 Number of Restricted Stock Units
	 	  
	 	

 Vesting Schedule: 
 Subject to any acceleration provisions contained in the Plan or as otherwise set forth below, the Restricted Stock Units will vest in accordance with the following schedule: 

[INSERT VESTING SCHEDULE.] 
 In the event Participant ceases to be a Service Provider for any or no reason before Participant vests in the Restricted Stock Units, the Restricted Stock Units and Participant’s right to acquire any
Shares hereunder will immediately terminate. 

 By Participant’s signature and the signature of the representative of AVI BioPharma,
Inc. (the “Company”) below, Participant and the Company agree that this Award of Restricted Stock Units is granted under and governed by the terms and conditions of the Plan and this Award Agreement, including the Terms and Conditions of
Restricted Stock Unit Grant, attached hereto as Exhibit A, all of which are made a part of this document. Participant has reviewed the Plan and this Award Agreement in their entirety, has had an opportunity to obtain the advice of counsel
prior to executing this Award Agreement and fully understands all provisions of the Plan and Award Agreement. Participant hereby agrees to accept as binding, conclusive and final all decisions or interpretations of the Administrator upon any
questions relating to the Plan and Award Agreement. Participant further agrees to notify the Company upon any change in the residence address indicated below. 
  

					
	PARTICIPANT:	  		  	AVI BIOPHARMA, INC.
			
	  
	  		  	  

	Signature	  		  	By
			
	  
	  		  	  

	Print Name	  		  	Title
			
	Address:	  		  	
			
	  
	  		  	
			
	  
	  		  	

  
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 EXHIBIT A 

TERMS AND CONDITIONS OF RESTRICTED STOCK UNIT GRANT 
 1. Grant. The Company hereby grants to the individual named in the Notice of Grant attached as Part I of this Award Agreement (the “Participant”) under the Plan an Award of Restricted
Stock Units, subject to all of the terms and conditions in this Award Agreement and the Plan, which is incorporated herein by reference. Subject to Section 20(c), in the event of a conflict between the terms and conditions of the Plan and the
terms and conditions of this Award Agreement, the terms and conditions of the Plan will prevail. 
 2.
Company’s Obligation to Pay. Each Restricted Stock Unit represents the right to receive a Share on the date it vests. Unless and until the Restricted Stock Units will have vested in the manner set forth in Section 3, Participant
will have no right to payment of any such Restricted Stock Units. Prior to actual payment of any vested Restricted Stock Units, such Restricted Stock Unit will represent an unsecured obligation of the Company, payable (if at all) only from the
general assets of the Company. Any Restricted Stock Units that vest in accordance with Sections 3 or 4 will be paid to Participant (or in the event of Participant’s death, to his or her estate) in whole Shares, subject to Participant satisfying
any applicable tax withholding obligations as set forth in Section 7. Subject to the provisions of Section 4, such vested Restricted Stock Units will be paid in Shares as soon as practicable after vesting, but in each such case within the
period ending no later than the date that is two and one-half (2 1/2) months from the end of the Company’s tax year that includes the vesting date. 
 3. Vesting Schedule. Except as provided in Section 4, and subject to Section 5, the Restricted Stock Units awarded by this Award Agreement will vest in accordance with the vesting
provisions set forth in the Notice of Grant. Restricted Stock Units scheduled to vest on a certain date or upon the occurrence of a certain condition will not vest in Participant in accordance with any of the provisions of this Award Agreement,
unless Participant will have been continuously a Service Provider from the Date of Grant until the date such vesting occurs. 

4. Administrator Discretion. The Administrator, in its discretion, may accelerate the vesting of the balance, or some lesser
portion of the balance, of the unvested Restricted Stock Units at any time, subject to the terms of the Plan. If so accelerated, such Restricted Stock Units will be considered as having vested as of the date specified by the Administrator.

 Notwithstanding anything in the Plan or this Award Agreement to the contrary, if the vesting of the balance, or some lesser
portion of the balance, of the Restricted Stock Units is accelerated in connection with Participant’s termination as a Service Provider (provided that such termination is a “separation from service” within the meaning of
Section 409A, as determined by the Company), other than due to death, and if (x) Participant is a “specified employee” within the meaning of Section 409A at the time of such termination as a Service Provider and
(y) the payment of such accelerated Restricted Stock Units will result in the imposition of additional tax under Section 409A if paid to Participant on or within the six (6) month period following Participant’s termination as a
Service Provider, then the payment of such accelerated Restricted Stock Units will not be made until the date six (6) months and one (1) day following the date of Participant’s termination as a Service Provider, unless the Participant
dies 

  
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following his or her termination as a Service Provider, in which case, the Restricted Stock Units will be paid in Shares to the Participant’s estate as soon as practicable following his or
her death. It is the intent of this Award Agreement to comply with the requirements of Section 409A so that none of the Restricted Stock Units provided under this Award Agreement or Shares issuable thereunder will be subject to the additional
tax imposed under Section 409A, and any ambiguities herein will be interpreted to so comply. For purposes of this Award Agreement, “Section 409A” means Section 409A of the Code, and any proposed, temporary or final Treasury
Regulations and Internal Revenue Service guidance thereunder, as each may be amended from time to time. 
 5. Forfeiture upon
Termination of Status as a Service Provider. Notwithstanding any contrary provision of this Award Agreement, the balance of the Restricted Stock Units that have not vested as of the time of Participant’s termination as a Service Provider
for any or no reason and Participant’s right to acquire any Shares hereunder will immediately terminate. 
 6. Death of
Participant. Any distribution or delivery to be made to Participant under this Award Agreement will, if Participant is then deceased, be made to Participant’s designated beneficiary, or if no beneficiary survives Participant, the
administrator or executor of Participant’s estate. Any such transferee must furnish the Company with (a) written notice of his or her status as transferee, and (b) evidence satisfactory to the Company to establish the validity of the
transfer and compliance with any laws or regulations pertaining to said transfer. 
 7. Withholding of Taxes.
Notwithstanding any contrary provision of this Award Agreement, no certificate representing the Shares will be issued to Participant, unless and until satisfactory arrangements (as determined by the Administrator) will have been made by Participant
with respect to the payment of income, employment and other taxes which the Company determines must be withheld with respect to such Shares. The Administrator, in its sole discretion and pursuant to such procedures as it may specify from time to
time, may permit Participant to satisfy such tax withholding obligation, in whole or in part (without limitation) by (a) paying cash, (b) electing to have the Company withhold otherwise deliverable Shares having a Fair Market Value equal
to the minimum amount required to be withheld, (c) delivering to the Company already vested and owned Shares having a Fair Market Value equal to the amount required to be withheld, or (d) selling a sufficient number of such Shares
otherwise deliverable to Participant through such means as the Company may determine in its sole discretion (whether through a broker or otherwise) equal to the amount required to be withheld. To the extent determined appropriate by the Company in
its discretion, it will have the right (but not the obligation) to satisfy any tax withholding obligations by reducing the number of Shares otherwise deliverable to Participant. If Participant fails to make satisfactory arrangements for the payment
of any required tax withholding obligations hereunder at the time any applicable Restricted Stock Units otherwise are scheduled to vest pursuant to Sections 3 or 4, Participant will permanently forfeit such Restricted Stock Units and any right to
receive Shares thereunder and the Restricted Stock Units will be returned to the Company at no cost to the Company. 
 8.
Rights as Shareholder. Neither Participant nor any person claiming under or through Participant will have any of the rights or privileges of a shareholder of the Company in respect of any Shares deliverable hereunder unless and until
certificates representing such Shares will have been issued, recorded on the records of the Company or its transfer agents or registrars, 

  
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and delivered to Participant. After such issuance, recordation and delivery, Participant will have all the rights of a shareholder of the Company with respect to voting such Shares and receipt of
dividends and distributions on such Shares. 
 9. No Guarantee of Continued Service. PARTICIPANT ACKNOWLEDGES AND AGREES
THAT THE VESTING OF THE RESTRICTED STOCK UNITS PURSUANT TO THE VESTING SCHEDULE HEREOF IS EARNED ONLY BY CONTINUING AS A SERVICE PROVIDER AT THE WILL OF THE COMPANY (OR THE PARENT OR SUBSIDIARY EMPLOYING OR RETAINING PARTICIPANT) AND NOT THROUGH THE
ACT OF BEING HIRED, BEING GRANTED THIS AWARD OF RESTRICTED STOCK UNITS OR ACQUIRING SHARES HEREUNDER. PARTICIPANT FURTHER ACKNOWLEDGES AND AGREES THAT THIS AWARD AGREEMENT, THE TRANSACTIONS CONTEMPLATED HEREUNDER AND THE VESTING SCHEDULE SET FORTH
HEREIN DO NOT CONSTITUTE AN EXPRESS OR IMPLIED PROMISE OF CONTINUED ENGAGEMENT AS A SERVICE PROVIDER FOR THE VESTING PERIOD, FOR ANY PERIOD, OR AT ALL, AND WILL NOT INTERFERE IN ANY WAY WITH PARTICIPANT’S RIGHT OR THE RIGHT OF THE COMPANY (OR
THE PARENT OR SUBSIDIARY EMPLOYING OR RETAINING PARTICIPANT) TO TERMINATE PARTICIPANT’S RELATIONSHIP AS A SERVICE PROVIDER AT ANY TIME, WITH OR WITHOUT CAUSE. 
 10. Address for Notices. Any notice to be given to the Company under the terms of this Award Agreement will be addressed to the Company, in care of Stock Administration at AVI BioPharma, Inc., at
3450 Monte Villa Parkway, Suite 101, Bothell, WA 98021, or at such other address as the Company may hereafter designate in writing. 
 11. Grant is Not Transferable. Except to the limited extent provided in Section 6, this grant and the rights and privileges conferred hereby will not be transferred, assigned, pledged or
hypothecated in any way (whether by operation of law or otherwise) and will not be subject to sale under execution, attachment or similar process. Upon any attempt to transfer, assign, pledge, hypothecate or otherwise dispose of this grant, or any
right or privilege conferred hereby, or upon any attempted sale under any execution, attachment or similar process, this grant and the rights and privileges conferred hereby immediately will become null and void. 

12. Binding Agreement. Subject to the limitation on the transferability of this grant contained herein, this Award Agreement will
be binding upon and inure to the benefit of the heirs, legatees, legal representatives, successors and assigns of the parties hereto. 
 13. Additional Conditions to Issuance of Stock. If at any time the Company will determine, in its discretion, that the listing, registration or qualification of the Shares upon any securities
exchange or under any state or federal law, or the consent or approval of any governmental regulatory authority is necessary or desirable as a condition to the issuance of Shares to Participant (or his or her estate), such issuance will not occur
unless and until such listing, registration, qualification, consent or approval will have been effected or obtained free of any conditions not acceptable to the Company. Where the Company determines that the delivery of the payment of any Shares
will violate federal securities laws or other applicable laws, the Company will defer delivery until the earliest date at which the Company reasonably anticipates 

  
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that the delivery of Shares will no longer cause such violation. The Company will make all reasonable efforts to meet the requirements of any such state or federal law or securities exchange and
to obtain any such consent or approval of any such governmental authority. 
 14. Plan Governs. This Award Agreement is
subject to all terms and provisions of the Plan. In the event of a conflict between one or more provisions of this Award Agreement and one or more provisions of the Plan, the provisions of the Plan will govern. Capitalized terms used and not defined
in this Award Agreement will have the meaning set forth in the Plan. 
 15. Administrator Authority. The Administrator
will have the power to interpret the Plan and this Award Agreement and to adopt such rules for the administration, interpretation and application of the Plan as are consistent therewith and to interpret or revoke any such rules (including, but not
limited to, the determination of whether or not any Restricted Stock Units have vested). All actions taken and all interpretations and determinations made by the Administrator in good faith will be final and binding upon Participant, the Company and
all other interested persons. No member of the Administrator will be personally liable for any action, determination or interpretation made in good faith with respect to the Plan or this Award Agreement. 

16. Electronic Delivery. The Company may, in its sole discretion, decide to deliver any documents related to Restricted Stock
Units awarded under the Plan or future Restricted Stock Units that may be awarded under the Plan by electronic means or request Participant’s consent to participate in the Plan by electronic means. Participant hereby consents to receive such
documents by electronic delivery and agrees to participate in the Plan through any on-line or electronic system established and maintained by the Company or another third party designated by the Company. 

17. Captions. Captions provided herein are for convenience only and are not to serve as a basis for interpretation or construction
of this Award Agreement. 
 18. Agreement Severable. In the event that any provision in this Award Agreement will be held
invalid or unenforceable, such provision will be severable from, and such invalidity or unenforceability will not be construed to have any effect on, the remaining provisions of this Award Agreement. 

19. Modifications to the Agreement. This Award Agreement constitutes the entire understanding of the parties on the subjects
covered. Participant expressly warrants that he or she is not accepting this Award Agreement in reliance on any promises, representations, or inducements other than those contained herein. Modifications to this Award Agreement or the Plan can be
made only in an express written contract executed by a duly authorized officer of the Company. Notwithstanding anything to the contrary in the Plan or this Award Agreement, the Company reserves the right to revise this Award Agreement as it deems
necessary or advisable, in its sole discretion and without the consent of Participant, to comply with Section 409A or to otherwise avoid imposition of any additional tax or income recognition under Section 409A in connection to this Award
of Restricted Stock Units. 

  
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 20. Amendment, Suspension or Termination of the Plan. By accepting this Award,
Participant expressly warrants that he or she has received an Award of Restricted Stock Units under the Plan, and has received, read and understood a description of the Plan. Participant understands that the Plan is discretionary in nature and may
be amended, suspended or terminated by the Company at any time. 
 21. Governing Law. This Award Agreement will be
governed by the laws of the State of Oregon, without giving effect to the conflict of law principles thereof. For purposes of litigating any dispute that arises under this Restricted Stock Unit or this Award Agreement, the parties hereby submit to
and consent to the jurisdiction of the State of Oregon, and agree that such litigation will be conducted in the state courts of Oregon, or the federal courts for the United States for the District of Oregon, and no other courts, where this
Restricted Stock Unit is made and/or to be performed. 

  
 -7-Voting Agreement

 Exhibit 10.1 
 VOTING AGREEMENT 
 THIS VOTING AGREEMENT (this
“Agreement”), is dated as of April 24, 2012 by and between GeoResources, Inc., a Colorado corporation (the “Company”) and HALRES LLC, a Delaware limited liability company (“Stockholder”).

 WHEREAS, Stockholder is, as of the date hereof, the record and beneficial owner of that number of shares of Common Stock, par
value $0.0001 per share (the “Parent Common Stock”), of Halcón Resources Corporation, a Delaware corporation (the “Parent”), set forth opposite Stockholder’s name on Schedule A hereto; 

WHEREAS, Parent, a wholly owned subsidiary of Parent (“Merger Sub”) and the Company concurrently with the execution and
delivery of this Agreement are entering into an Agreement and Plan of Merger, dated as of the date hereof (as the same may be amended or supplemented, the “Merger Agreement”), providing for, among other things, the merger (the
“Merger”) of Merger Sub with and into the Company, and the Company as the surviving entity to the Merger thereafter merging with and into another wholly owned subsidiary of Parent, upon the terms and subject to the conditions set
forth in the Merger Agreement (capitalized terms used and not otherwise defined herein shall have the meanings attributed thereto in the Merger Agreement); and 
 WHEREAS, as a condition to the willingness of the Company to enter into the Merger Agreement, and in order to induce the Company to enter into the Merger Agreement, Stockholder has agreed to enter into
this Agreement. 
 NOW, THEREFORE, in consideration of the execution and delivery by the Company of the Merger Agreement and the
mutual representations, warranties, covenants and agreements contained herein, and other good and valuable consideration, the receipt and sufficiency of which are hereby acknowledged, the parties hereto agree as follows: 

Section 1. Representations and Warranties of Stockholder. Stockholder hereby represents and warrants to the Company as
follows: 
 (a) Stockholder is the beneficial owner (within the meaning of Rule 13d-3 under the Securities
Exchange Act of 1934, as amended (the “Exchange Act”)) and unless otherwise indicated, the record owner of the shares of Parent Common Stock (as may be adjusted from time to time pursuant to Section 5 hereof, the
“Shares”) set forth opposite Stockholder’s name on Schedule A to this Agreement and such Shares represent all of the shares of Parent Common Stock beneficially owned by Stockholder as of the date hereof. For purposes of
this Agreement, the term “Shares” shall include any shares of Parent Common Stock issuable to Stockholder upon exercise or conversion of any existing right, contract, option, or warrant to purchase, or securities convertible into or
exchangeable for, Parent Common Stock (“Stockholder Rights”) that are currently exercisable or convertible or become exercisable or convertible and any other shares of Parent Common Stock Stockholder may acquire or beneficially own
during the term of this Agreement. 

  
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 (b) Stockholder has all requisite power and authority to execute and deliver
this Agreement and to consummate the transactions contemplated hereby. This Agreement has been validly executed and delivered by Stockholder and, assuming that this Agreement constitutes the legal, valid and binding obligation of the Company,
constitutes the legal, valid and binding obligation of Stockholder, enforceable against Stockholder in accordance with its terms (except insofar as enforceability may be limited by applicable bankruptcy, insolvency, reorganization, moratorium or
similar laws affecting creditors’ rights generally, or by principles governing the availability of equitable remedies). 
 (c) The execution and delivery of this Agreement by Stockholder does not, and the performance of this Agreement by Stockholder will not, (i) conflict with the certificate of formation or limited
liability company agreement or similar organizational documents of Stockholder as presently in effect, (ii) conflict with or violate any judgment, order, decree, statute, Law, ordinance, rule or regulation applicable to Stockholder or by which
it is bound or affected, (iii)(A) result in any breach of or constitute a default (or an event that with notice or lapse of time or both would become a default) under, (B) give to any other Person any rights of termination, amendment,
acceleration or cancellation of, or (C) result in the creation of any pledge, claim, lien, charge, encumbrance or security interest of any kind or nature whatsoever upon any of the properties or assets of Stockholder under, any agreement,
contract, indenture, note or instrument to which Stockholder is a party or by which it is bound or affected, except for such breaches, defaults or other occurrences that would not prevent or materially delay the performance by Stockholder of any of
Stockholder’s obligations under this Agreement, or (iv) except for applicable requirements, if any, of the Exchange Act, the Securities Act of 1933, as amended (the “Securities Act”), the New York Stock Exchange (the
“NYSE”) or the Hart-Scott-Rodino Antitrust Improvements Act of 1976, as amended (the “HSR Act”), require any filing by Stockholder with, or any permit, authorization, consent or approval of, any governmental or
regulatory authority, except where the failure to make such filing or obtain such permit, authorization, consent or approval would not prevent or materially delay the performance by Stockholder of any of Stockholder’s obligations under this
Agreement. 
 (d) The Shares and the certificates representing the Shares owned by Stockholder are now and at all
times during the term hereof will be held by Stockholder, or by a nominee or custodian for the benefit of Stockholder, free and clear of all pledges, liens, charges, claims, security interests, proxies, voting trusts or agreements, understandings or
arrangements or any other encumbrances whatsoever, except for any such encumbrances or proxies arising hereunder or under applicable federal and state securities laws or under the agreements set forth on Schedule B hereto. Stockholder owns of
record or beneficially no shares of Parent Common Stock other than Stockholder’s Shares. 
 (e) As of the
date hereof, neither Stockholder, nor any of its properties or assets is subject to any order, writ, judgment, injunction, decree, determination or award that would prevent or delay the consummation of the transactions contemplated hereby.

  
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 (f) Stockholder understands and acknowledges that the Company is entering
into, the Merger Agreement in reliance upon Stockholder’s execution and delivery of this Agreement. 
 Section 2.
Representations and Warranties of the Company. The Company hereby represents and warrants to Stockholder as follows: 
 (a) The Company is a corporation duly organized, validly existing and in good standing under the laws of the jurisdiction of its incorporation. The Company has all requisite power and authority to execute
and deliver this Agreement, to perform its obligations hereunder and to consummate the transactions contemplated hereby, and has taken all necessary corporate action to authorize the execution, delivery and performance of this Agreement. This
Agreement has been duly executed and delivered by the Company, assuming that this Agreement constitutes the legal, valid and binding obligation of the other parties hereto, constitutes the legal, valid and binding obligation of the Company,
enforceable against the Company in accordance with the terms of this Agreement (except insofar as enforceability may be limited by applicable bankruptcy, insolvency, reorganization, moratorium or similar laws affecting creditors’ rights
generally, or by principles governing the availability of equitable remedies). 
 (b) The execution and delivery
of this Agreement by the Company does not, and the performance of this Agreement by the Company will not, (i) conflict with the articles of incorporation or bylaws of the Company as presently in effect, (ii) conflict with or violate any
judgment, order, decree, statute, Law, ordinance, rule or regulation applicable to the Company or by which it is bound or affected, (iii) (A) result in any breach of or constitute a default (or an event that with notice or lapse of time or
both would become a default) under, (B) give to any other Person any rights of termination, amendment, acceleration or cancellation of, or (C) result in the creation of any pledge, claim, lien, charge, encumbrance or security interest of
any kind or nature whatsoever upon any of the properties or assets of the Company under, any agreement, contract, indenture, note or instrument to which the Company is a party or by which it is bound or affected, except for such breaches, defaults
or other occurrences that would not prevent or materially delay the performance by the Company of its obligations under this Agreement, or (iv) except for applicable requirements, if any, of the Exchange Act, the Securities Act, the NYSE or the
HSR Act, require any filing by the Company with, or any permit, authorization, consent or approval of, any governmental or regulatory authority, except where the failure to make such filing or obtain such permit, authorization, consent or approval
would not prevent or materially delay the performance by the Company of its obligations under this Agreement. 

  
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 (c) As of the date hereof, neither the Company nor any of its properties or
assets is subject to any order, writ, judgment, injunction, decree, determination or award that would prevent or delay the consummation of the transactions contemplated hereby. 

Section 3. Covenants of Stockholder. Stockholder agrees as follows: 

(a) Stockholder shall not, except as contemplated by the terms of this Agreement, sell, transfer, pledge, assign or
otherwise dispose of, or enter into any contract, option or other arrangement (including any profit-sharing arrangement) or understanding with respect to the sale, transfer, pledge, assignment or other disposition of, the Shares (including any
options or warrants to purchase Parent Common Stock) to any Person (any such action, a “Transfer”). For purposes of clarification, the term “Transfer” shall include, without limitation, any short sale (including any
“short sale against the box”), pledge, transfer, and the establishment of any open “put equivalent position” within the meaning of Rule 16a-1(h) under the Exchange Act. Notwithstanding the foregoing, (i) Transfers of Shares
as bona fide gifts, or (ii) distributions of Shares to partners, members, stockholders, subsidiaries, affiliates, affiliated partnerships or other affiliated entities of the undersigned, shall not be prohibited by this Agreement; provided that
in the case of any such transfer or distribution pursuant to clause (i) or (ii), each donee or distributee shall execute and deliver to the Company a valid and binding counterpart to this Agreement. 

(b) Stockholder shall not, except as contemplated by the terms of this Agreement (i) enter into any voting
arrangement, whether by proxy, voting agreement, voting trust, power-of-attorney or otherwise, with respect to the Shares or (ii) take any other action that would in any way restrict, limit or interfere with the performance of its obligations
hereunder or the transactions contemplated hereby or make any representation or warranty of Stockholder herein untrue or incorrect in any material respect. 
 (c) At any meeting of Stockholders of the Parent called to vote upon the Merger or in connection with any Stockholder consent in respect of a vote on the Merger, the Merger Agreement or any other
transaction contemplated by the Merger Agreement or at any adjournment thereof or in any other circumstances upon which a vote, consent or other approval (including by written consent) with respect to such matters is sought, Stockholder shall vote
(or cause to be voted), or shall consent, execute a consent or cause to be executed a consent in respect of, Stockholder’s Shares in favor of the Merger, the adoption by the Parent of the Merger Agreement and the approval of any other
transactions contemplated by the Merger Agreement. 
 (d) Stockholder agrees to permit the Parent and Merger Sub
to publish and disclose in the Proxy Statement and related filings under the securities laws Stockholder’s identity and ownership of Shares and the nature of its commitments, arrangements and understandings under this Agreement and any other
information required by applicable Law. 

  
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 Section 4. Grant of Irrevocable Proxy; Appointment of Proxy. 

(a) Stockholder hereby irrevocably grants to, and appoints, Frank A. Lodzinski, and any other individual who shall
hereafter be designated by the Company, Stockholder’s proxy and attorney-in-fact (with full power of substitution), for and in the name, place and stead of Stockholder, to vote Stockholder’s Shares, or grant a consent or approval in
respect of such Shares, at any meeting of Stockholders of the Parent or at any adjournment thereof or in any other circumstances upon which their vote, consent or other approval is sought, in favor of the Merger, the adoption by the Parent of the
Merger Agreement and the approval of the other transactions contemplated by the Merger Agreement. 
 (b)
Stockholder represents that any existing proxies given in respect of Stockholder’s Shares are not irrevocable, and that any such proxies are hereby revoked. 

(c) Stockholder hereby affirms that the irrevocable proxy set forth in this Section 4 is given in connection
with the execution of the Merger Agreement, and that such irrevocable proxy is given to secure the performance of the duties of Stockholder under this Agreement. Stockholder hereby further affirms that the irrevocable proxy is coupled with an
interest and may under no circumstances be revoked, subject to Section 7 herein. Stockholder hereby ratifies and confirms all that such irrevocable proxy may lawfully do or cause to be done by virtue hereof. Such irrevocable proxy is
executed and intended to be irrevocable in accordance with applicable Law. Such irrevocable proxy shall be valid until the termination of this Agreement pursuant to Section 7 herein. 

Section 5. Adjustments Upon Share Issuances, Changes in Capitalization. In the event of any change in Parent Common Stock or
in the number of outstanding shares of Parent Common Stock by reason of a stock dividend, subdivision, reclassification, recapitalization, split, combination, exchange of shares or other similar event or transaction or any other change in the
corporate or capital structure of the Parent (including, without limitation, the declaration or payment of an extraordinary dividend of cash, securities or other property), and consequently the number of Shares changes or is otherwise adjusted, this
Agreement and the obligations hereunder shall attach to any additional shares of Parent Common Stock, Stockholder Rights or other securities or rights of the Parent issued to or acquired by Stockholder. 

Section 6. Further Assurances. Stockholder will, from time to time, execute and deliver, or cause to be executed and
delivered, such additional or further transfers, assignments, endorsements, consents and other instruments as the Company may reasonably request for the purpose of effectively carrying out the transactions contemplated by this Agreement and to vest
the power to vote Stockholder’s Shares as contemplated by Section 3 herein. 

  
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 Section 7. Termination. This Agreement, and all rights and obligations of the
parties hereunder, shall terminate upon the earlier of (a) the Effective Time and (b) the date upon which the Merger Agreement is terminated pursuant to Section 7.1 thereof. Notwithstanding the foregoing, Sections 7, 8 and
9 hereof shall survive any termination of this Agreement. 
 Section 8. Action in Stockholder Capacity Only. No
Person executing this Agreement who is or becomes during the term hereof a director or officer of the Parent makes any agreement or understanding herein in his or her capacity as such director or officer. Stockholder signs solely in its capacity as
the record holder and beneficial owner of, or the trustee of a trust whose beneficiaries are the beneficial owners of, Stockholder’s Shares and nothing herein shall limit or affect any actions taken by or fiduciary duties of Stockholder or any
of its affiliates in its or their capacity as an officer or director of the Parent to the extent permitted by the Merger Agreement and applicable Law. 
 Section 9. Miscellaneous. 
 (a) Assignment.
Neither this Agreement nor any of the rights, interests or obligations hereunder shall be assigned by any of the parties without the prior written consent of the other parties. Subject to the preceding sentence, this Agreement will be binding upon,
inure to the benefit of and be enforceable by the parties and their respective successors and assigns. Stockholder agrees that this Agreement and the obligations of Stockholder hereunder shall attach to Stockholder’s Shares and shall be binding
upon any person or entity to which legal or beneficial ownership of such Shares shall pass, whether by operation of law or otherwise, including without limitation Stockholder’s successors. 

(b) Expenses. All costs and expenses incurred in connection with this Agreement and the transactions contemplated
thereby shall be paid by the party incurring such expenses. 
 (c) Amendments. This Agreement may not be
amended except by an instrument in writing signed by each of the parties hereto and in compliance with applicable Law. 
 (d) Notice. All notices and other communications hereunder shall be in writing and shall be deemed duly given if delivered personally, mailed by registered or certified mail (return receipt
requested), delivered by Federal Express or other nationally recognized overnight courier service or sent via facsimile to the parties at the following addresses (or at such other address for a party as shall be specified by like notice):

 (i) if to Stockholder, to the address set forth under the name of Stockholder on Schedule A hereto

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

Thompson & Knight LLP 
 333 Clay Street, Suite 3300 
 Houston, Texas 77002 

Attention: William T. Heller IV 
 Fax: 713-654-1871 
 and 

(ii) if to the Company, addressed to it at: 
 GeoResources, Inc. 
 110 Cypress Station Drive, Suite 220 

Houston, Texas 77090 
 Attention: Frank A. Lodzinski 
 Fax: 281-537-8324 

with a copy to (which shall not constitute notice): 
 Jones & Keller, P.C. 
 1999 Broadway, Suite 3150 

Denver, Colorado 80202 
 Attention: Reid A. Godbolt 
 Fax: 303-573-8133 

(e) Interpretation. The headings contained in this Agreement are for reference purposes only and shall not affect
in any way the meaning or interpretation of this Agreement. In this Agreement, unless a contrary intention appears, (i) the words “herein,” “hereof” and “hereunder” and other words of similar import refer to this
Agreement as a whole and not to any particular Section or other subdivision and (ii) reference to any Section means such Section hereof. No provision of this Agreement shall be interpreted or construed against any party hereto solely because
such party or its legal representative drafted such provision. 
 (f) Counterparts. This Agreement may be
executed in two or more counterparts, each of which shall be deemed an original but all of which shall be considered one and the same agreement. Delivery of an executed counterpart signature page of this Agreement by facsimile is as effective as
executing and delivering this Agreement in the presence of the other parties. 
 (g) Entire Agreement.
This Agreement constitutes the entire agreement of the parties and supersedes all prior agreements and undertakings, both written and oral, between the parties, or any of them, with respect to the subject matter hereof, and except as otherwise
expressly provided herein, is not intended to confer upon any other Person any rights or remedies hereunder. 

(h) Governing Law; Consent to Jurisdiction; Waiver of Trial by Jury. This Agreement shall be governed by, and
construed in accordance with, the Laws of the State of Delaware, without regard to laws that may be applicable 

  
 7 

 
under conflicts of laws principles. Each of the parties hereto irrevocably and unconditionally (i) agrees that any suit, action or other legal proceeding arising out of or relating to this
Agreement or any of the agreements delivered in connection herewith or the transactions contemplated hereby or thereby shall be brought in the state courts of the State of Delaware (or, if such courts do not have jurisdiction or do not accept
jurisdiction, in the United States District Court located in the State of Delaware), (ii) consents to the jurisdiction of any such court in any such suit, action or proceeding, and (iii) waives any objection that such party may have to the
laying of venue of any such suit, action or proceeding in any such court. Each of the parties hereto agrees that a final judgment in any such action or proceeding shall be conclusive and may be enforced in other jurisdictions by suit on the judgment
or in any other manner provided by Law. Each party to this Agreement irrevocably consents to service of process in the manner provided for notices in Section 9(d). Nothing in this Agreement will affect the right of any party to this
Agreement to serve process in any other manner permitted by Law. 
 EACH PARTY ACKNOWLEDGES AND AGREES THAT ANY CONTROVERSY
WHICH MAY ARISE UNDER THIS AGREEMENT IS LIKELY TO INVOLVE COMPLICATED AND DIFFICULT ISSUES, AND THEREFORE IT HEREBY IRREVOCABLY AND UNCONDITIONALLY WAIVES ANY RIGHT IT MAY HAVE TO A TRIAL BY JURY IN RESPECT OF ANY LITIGATION DIRECTLY OR INDIRECTLY
ARISING OUT OF OR RELATING TO THIS AGREEMENT AND ANY OF THE AGREEMENTS DELIVERED IN CONNECTION HEREWITH OR THE TRANSACTIONS CONTEMPLATED HEREBY OR THEREBY. EACH PARTY CERTIFIES AND ACKNOWLEDGES THAT (A) NO REPRESENTATIVE, AGENT OR ATTORNEY OF
ANY OTHER PARTY HAS REPRESENTED, EXPRESSLY OR OTHERWISE, THAT SUCH OTHER PARTY WOULD NOT, IN THE EVENT OF LITIGATION, SEEK TO ENFORCE EITHER OF SUCH WAIVERS, (B) IT UNDERSTANDS AND HAS CONSIDERED THE IMPLICATIONS OF SUCH WAIVERS, (C) IT
MAKES SUCH WAIVERS VOLUNTARILY, AND (D) IT HAS BEEN INDUCED TO ENTER INTO THIS AGREEMENT BY, AMONG OTHER THINGS, THE MUTUAL WAIVERS AND CERTIFICATIONS IN THIS SECTION 9(h). 

(i) Specific Performance. The parties to this Agreement agree that irreparable damage would occur in the event that
any provision of this Agreement was not performed in accordance with the terms of this Agreement and that the Company shall be entitled to specific performance of the terms of this Agreement in addition to any other remedy at Law or equity.

 (j) Severability. If any term, provision, covenant or restriction of this Agreement is held by a court
of competent jurisdiction or other authority to be invalid, void, unenforceable or against its regulatory policy, the remainder of the terms, provisions, covenants and restrictions of this Agreement shall remain in full force and effect and shall in
no way be affected, impaired or invalidated. 

  
 8 

 (k) Non-Recourse. No past, present or future director, officer,
employee, incorporator, member, partner, stockholder, agent, attorney, representative or affiliate of Stockholder hereto or of any of their respective affiliates shall have any liability (whether in contract or in tort) for any obligations or
liabilities of such party arising under, in connection with or related to this Agreement or for any claim based on, in respect of, or by reason of, the transactions contemplated hereby; provided, however, that nothing in this
paragraph (k) shall limit any liability of Stockholder hereto for its breaches of the terms and conditions of this Agreement. 
 (l) Waiver. No failure or delay by any party in exercising any right, power or privilege hereunder shall operate as a waiver thereof nor shall any single or partial exercise thereof preclude any
other or further exercise thereof or the exercise of any other right, power or privilege. The rights and remedies herein provided shall be cumulative and not exclusive of any rights or remedies provided by applicable Law. 

[Remainder of Page Intentionally Left Blank; Signature Page Follows] 

  
 9 

 IN WITNESS WHEREOF, the Company has caused this Agreement to be signed by its officer
thereunto duly authorized and Stockholder has signed this Agreement, all as of the date first written above. 
  

			
	GEORESOURCES, INC.
		
	By:	 	 /s/ Frank A. Lodzinski

	Name:	 	Frank A. Lodzinski
	Title:	 	President and Chief Executive Officer

 SIGNATURE PAGE TO 
 VOTING AGREEMENT 

 VOTING AGREEMENT 
 STOCKHOLDER SIGNATURE PAGE 
 IN WITNESS WHEREOF, the Company has caused this
Agreement to be signed by its officer thereunto duly authorized and Stockholder has signed this Agreement, all as of the date first written above. 
  

			
	STOCKHOLDER:
	
	HALRES LLC
		
	By:	 	 /s/ Floyd C. Wilson

	Name:	 	Floyd C. Wilson
	Title:	 	Manager

 SIGNATURE PAGE TO 
 VOTING AGREEMENT 

 SCHEDULE A 

OWNERSHIP OF SHARES 
  

					
	 Name and Address of Stockholder
	  	Number of Shares of Parent
Common Stock	 
		
	 HALRES LLC

1000 Louisiana Street

Suite 6700
 Houston, Texas 77002
	  	 	110,000,001	* 

  

	*	Includes a warrant to purchase 36,666,667 shares of common stock exercisable within 60 days after the date hereof owned by HALRES LLC. 

 SCHEDULE B 

LIST OF AGREEMENTS 

None.

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