Document:

Amended and Restated 2004 Directors' Stock Option Plan

 Exhibit 4.2 
 PRO-DEX, INC. 
 AMENDED AND RESTATED 2004 DIRECTORS’ STOCK OPTION
PLAN 
 This Amended and Restated 2004 Directors’ Stock Option Plan (the “Plan”) is adopted in
consideration for services rendered and to be rendered to Pro-Dex, Inc. and related companies. 

1.          Definitions. Unless otherwise indicated or required by the
particular context, the terms used in this Plan shall have the following meanings: 

(a)          Board: The Board of Directors of Pro-Dex, Inc. 

(b)          Change of Control: shall mean the occurrence of any of the following
events: 
 (i)          Any “person” or
“group” (as such term is used in Sections 13(d) and 14(d) of the Securities Exchange Act of 1934, as amended) is or becomes the “beneficial owner” (as defined in Rule 13d-3 under said Act), directly or indirectly,
of securities of the Company representing fifty percent (50%) or more of the total voting power represented by the Company’s then outstanding voting securities; 
 (ii)          A change in the composition of the Board of the Company occurring within a one-year period, resulting in the change of sixty percent or more
of the directors serving on the Board from the beginning of the of the one-year period to the end of the one-year period; 

(iii)          There is a merger or consolidation of the Company in which the Company
does not survive as an independent public company; or 
 (iv)          The
acquisition of all or substantially all the Company’s assets in a transaction or series of related transactions with a third-party purchaser. 
 (c)          Code: The Internal Revenue Code of 1986, as amended. 
 (d)          Common Stock: The no par value common stock of Pro-Dex, Inc. 
 (e)          Company: Pro-Dex, Inc., a corporation incorporated under the laws of Colorado, together with any successors thereto. 

(f)          Date of Grant: The date on which an Option (see below) is granted
under the Plan. 
 (g)          Effective Date: The date the Plan is
approved by the Board, which is September 12, 2011. 

(h)          Fair Market Value: If, at any time an Option is granted under the
Plan, the Company’s Common Stock is publicly traded, Fair Market Value shall be determined as of the last business day for which the prices or quotes discussed in this sentence are available prior to

 
the date an Option is granted and shall mean (i) the closing price (on that date) of the Common Stock on the principal national securities exchange by which the Common Stock is traded, if
the stock is then traded on a national securities exchange; or, (ii) the last reported sale price (on that date) of the Common Stock on NASDAQ, if the stock is not then traded on a national securities exchange; or (iii) the closing bid
price last quoted (on that date) by an established quotation service for over-the-counter securities, if the stock is not reported on NASDAQ. However, if the Common Stock is not publicly traded at the time an Option is granted under the Plan, Fair
Market Value shall be as determined in good faith by the Board based on such valuations and other factors it deems appropriate. 

(i)          Nonemployee Director: A person who is a member of the Board on the
Date of Grant and who is not an employee of the Company. 

(j)          Option: The rights to purchase a stated number of shares of Common
Stock granted pursuant to the terms, conditions and restrictions of the Plan and an Option Agreement (as defined below). 

(k)          Option Agreement: The written agreement (including any amendments
or supplements thereto) between the Company and a Nonemployee Director designating the terms, restrictions and conditions of an Option. 
 (l)           Option Shares: The shares of Common Stock underlying an Option granted to a Nonemployee Director. 

(m)         Optionee: A Nonemployee Director who has been granted an Option.

 (n)          Prior Plan: The 2004 Directors’ Stock Option Plan
of the Company. 
 2.          Purpose and Scope. 

(a)          The purpose of this Plan is to advance the interests of the Company and
its shareholders by affording Nonemployee Directors, whose participation and guidance contribute to the successful operation of the Company, an opportunity for investment in the Company and the incentive advantages inherent in stock ownership in
this Company. The Plan is also intended to further the efforts of the company to attract and retain qualified Non-Employee Directors. 
 (b)          This Plan authorizes that Options be granted to Nonemployee Directors according to the formula set forth in Section 3 of this
Plan. 
 (c)          It is the further intent of the Plan that it conform in
all respects with (i) the requirements of Rule 16b-3 of the Securities Exchange Act of 1934 (“Rule 16b-3”) and (ii) the Code. To the extent that any aspect of the Plan or its administration is at any time viewed as
inconsistent with the requirements of Rule 16b-3 or the Code, that aspect shall be deemed to be modified, deleted, or otherwise changed as necessary to ensure continued compliance with Rule 16b-3 or Code requirements. 

(d)          Notwithstanding any other provision in the Plan or an Option Agreement to
the contrary, if and to the extent that Code Section 409A is deemed to apply to the Plan or any 

  
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Option granted under the Plan, it is the general intention of the Company that the Plan and all such Options shall, to the extent practicable, comply with Code Section 409A, and the Plan and
any such Option shall, to the extent practicable, be construed in accordance therewith. Without in any way limiting the effect of the foregoing, in the event that Code Section 409A requires that any special terms, provisions or conditions be
included in the Plan or any Option, then such terms, provisions and conditions shall, to the extent practicable, be deemed to be made a part of the Plan or Option, as applicable. Further, in the event that the Plan or any Option shall be deemed not
to comply with Code Section 409A, then neither the Corporation nor the Board shall be liable to any Optionee or other person for actions, decisions or determinations made in good faith. 

3.          Operation of the Plan. 

(a)          Grant of Options; Amount and Timing. The Board may grant Options to
Nonemployee Directors in such amounts and subject to such terms and conditions as set forth in any Director Compensation Program of the Company adopted by the Board, subject to the provisions of the Plan. All Options shall be exercisable only as set
forth in Sections 3(c) and 6 below and shall be subject to the other terms and conditions set forth in this Plan or otherwise established by the Company. 
 (b)          Option Purchase Price. The exercise price for each Option Share shall be the Fair Market Value of the Company’s Common Stock on
the Date of Grant. 
 (c)          Term. Each Option shall expire ten
years after the Date of Grant, except that an Option will expire, if not exercised, 90 days after the Optionee ceases to be a Non-Employee Director of the Company. 
 (d)          Amendments. This Plan may be changed or modified from time to time provided, however, that, (i) no such change or modification
shall impair any Option previously granted under the Plan; (ii) the provisions relating to the amount, price and timing of the Options shall not be amended more than once every six months other than to comport with changes in the Code, the
Employee Retirement Income Security Act, or rules promulgated thereunder, or other applicable law; and (iii) the approval by the affirmative vote of the holders of a majority of shares of the Company’s securities present, or represented,
and entitled to vote at a meeting duly held in accordance with the applicable laws of the State of Colorado, shall be required for any amendment which would do any of the following: 

(i)          materially modify the eligibility requirements for receiving Options
under the Plan; 
 (ii)          except as provided in
Section 8 relative to capital changes, increase the number of shares purchasable pursuant to the granting of any Option hereunder or the exercise price of each Option; 

(iii)         increase the maximum term of Options granted; 

(iv)         decrease the minimum price at which Options may be granted;

  
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 (v)           change the dollar
amount pursuant to which Options may be granted at any one time; 

(vi)          change the timing of Option Grants; or 

(vii)         increase the term of the Plan. 

4.          Number of Shares. The Board is authorized to appropriate, issue and
sell for the purposes of the Plan, an aggregate maximum of (i) the sum of (A) 100,000 shares of Common Stock, plus (B) any shares of Common Stock remaining available for issuance under the Prior Plan as of the Effective Date of the
Plan, plus (C) any shares of Common Stock subject to an Option granted under the Prior Plan or the Plan, which Option at any time is forfeited, cancelled, terminated, expires or lapses for any reason without the issuance of shares pursuant to
the Option or (ii) the number and kind of shares of stock or other securities which in accordance with Section 8 may be substituted for the shares authorized under sub-section (i) or into which such shares shall be adjusted.

 5.          Eligibility. Options shall be granted under the Plan
only to Nonemployee Directors provided that any Nonemployee Director may waive his right to participate in the Plan. 

6.          Exercise of Options. 

(a)          Each Option granted pursuant to this Plan shall be exercisable in full
commencing six months after the Date of Grant, except as otherwise determined by the Board. 

(b)          Each Option may be exercised in whole or in part by delivering to the
Chief Financial Officer of the Company written notice of the number of shares with respect to which the Option is to be exercised and by paying in full the purchase price for the Option Shares as set forth in Section 7 herein; provided,
that an Option may not be exercised in part unless the purchase price for the Option Shares purchased is at least $2,000. 

(c)          No Option may be exercised, and no Option Shares may be sold, transferred
or otherwise disposed of for a period of at least six months following the Date of Grant of the Option. 

  
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 7.          Payment for Option
Shares. Upon exercise of any Option, the aggregate exercise price shall be paid to the Company in cash or by certified or cashier’s check. For any single purchase by an Optionee of Option Shares at a total purchase price in excess of
$2,000, the Company, in its sole discretion, upon request by the Optionee, may permit all or part of the purchase price for the Option Shares to be paid by (a) delivery to the Company for cancellation shares of the Common Stock previously owned
by the Optionee (“Previously Owned Shares”) with a Fair Market Value as of the date of the payment equal to the portion of the purchase price for the Option Shares that the Optionee does not pay in cash; (b) having shares
withheld from the amount of shares to be received by the Optionee; or (c) complying with any other payment mechanism as the Company may approve from time to time. Notwithstanding the above, an Optionee shall be permitted to exercise his Option
by delivering Previously Owned Shares only if he has held, and provides appropriate evidence of such, the Previously Owned Shares for more than six months prior to the date of exercise. This period (the “Holding Period”) may be
extended by the Company acting in its sole discretion as is necessary, in the opinion of the Company, so that, under generally accepted accounting principles, no compensation shall be considered to have been or to be paid to the Optionee as a result
of the exercise of the Option in this manner. At the time the Option is exercised, the Optionee shall provide an affidavit, and such other evidence and documents as the Company shall request, to establish the Optionee’s Holding Period. As
indicated above, an Optionee may deliver shares of Common Stock as part of the purchase price only if the Company, in its sole discretion agrees, on a case by case basis, to permit this form of payment. 

8.          Change in Stock, Adjustments, Etc. 

(a)          In the event that each of the outstanding shares of Common Stock (other
than shares held by dissenting shareholders which are not changed or exchanged) should be changed into, or exchanged for, a different number or kind of shares of stock or other securities of the Company, or if further changes or exchanges of any
stock or other securities into which the Common Stock shall have been changed, or for which it shall have been exchanged, shall be made (whether by reason of merger, consolidation, reorganization, recapitalization, stock dividends, reclassification,
split-up, combination of shares or otherwise) then there shall be substituted for each share of Common Stock that is subject to the Plan but not subject to an outstanding Option hereunder, the number and kind of shares of stock or other securities
into which each outstanding shares of Common Stock (other than shares held by dissenting shareholders which are not changed or exchanged) shall be so changed or for which each outstanding share of Common Stock (other than shares held by dissenting
shareholders) shall be so changed or for which each such share shall be exchanged. Any securities so substituted shall be subject to similar successive adjustments. 
 (b)          In the event of any such changes or exchanges, (i) the number, or kind, or exercise price of the Option Shares or other securities that
are then subject to an Option or Options granted pursuant to the Plan shall be deemed automatically adjusted in order to prevent dilution or enlargement of rights and (ii) such adjustments shall be effective and binding for all purposes or the
Plan. 
 9.          Nontransferability of Option. Except as herein
provided, no Option granted under the Plan shall be transferable by the Optionee, either voluntarily or involuntarily, except by will, 

  
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by the laws of descent and distribution, or pursuant to a qualified domestic relations order as defined in the Code or the Employee Retirement Income Security Act or rules promulgated thereunder;
and no Option shall be subject to execution, attachment or similar process. Except as may be permitted by the preceding sentence, an Option shall be exercisable during the Optionee’s lifetime only by him or by his guardian or legal
representative. Any attempt to transfer an Option except as otherwise herein provided shall void the Option. Notwithstanding anything herein to the contrary, an Option may be transferred to an immediate family member or a family trust if such
transfer is then permitted by the rules adopted under Section 16(b) of the Securities Exchange Act of 1934, as amended. 

10.          Rights as a Shareholder. No person shall have any rights as a
shareholder with respect to any shares covered by an Option until that person becomes the holder of record of such shares and, except as provided in Section 8, no adjustments shall be made for dividends or other distributions or other
rights as to which there is an earlier record date. 

11.          Securities Laws Requirements. No Option Shares shall be issued
unless and until, in the opinion of the Company, any applicable registration requirements of the Securities Act of 1933, as amended (“Securities Act”), any applicable listing requirements of any securities exchange on which stock of
the same class is then listed, and any other requirement of law or of any regulatory bodies having jurisdiction over such issuance and delivery, have been fully complied with. Each Option Agreement and each Option Share certificate may be imprinted
with legends reflecting federal and state securities laws restrictions and conditions, and the Company may comply therewith and issue “stop transfer” instructions to its transfer agent and registrar in good faith without liability.

 12.          Disposition of Shares. To the extent reasonably
requested by the Company, each Optionee, as a condition of exercise, shall represent, warrant and agree, in a form of written certificate approved by the Company, as follows: (a) that all Option Shares are being acquired solely for his/her own
account and not on behalf of any other person or entity; (b) that no Option Shares will be sold or otherwise distributed in violation of the Securities Act or any other applicable federal or state securities laws; (c) that he/she will
report all sales of Option Shares to the Company in writing on a form prescribed by the Company; and (d) that if he/she is subject to the reporting requirements under Section 16(a) of the Exchange Act (i) he will not violate
Section 16(b) of the Exchange Act, (ii) he will furnish the Company with a copy of each Form 4 and Form 5 filed by him, and (iii) he will timely file all reports required under the federal securities laws. 

13.          Effective Date of Plan; Termination Date of Plan. The Plan shall be
effective on the date the Plan has been approved by the Board and the shareholders of the Company. The Plan was adopted, subject to shareholder approval, by the Board as of September 12, 2011. The Plan shall terminate on September 12,
2021, except as to Options previously granted and outstanding under the Plan at that time. No Options shall be granted after the date on which the Plan terminates. In no event may the Option period exceed ten years from the date on which the Option
is granted. The Plan may be abandoned or terminated at any earlier time by the affirmative vote of the holders of a majority of the shares of Common Stock present, or represented, and entitled to vote at a meeting duly held in accordance with the
applicable laws of the State of Colorado, except with respect to any Options then outstanding under the Plan. 

  
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 14.          Withholding Taxes. The
Option Agreement shall provide that the Company may take such steps as it may deem necessary or appropriate for the withholding of any taxes which the Company is required by any law or regulation or any governmental authority, whether federal, state
or local, domestic or foreign, to withhold in connection with any Option including, but riot limited to, the withholding of all or any portion of any payment or the withholding of issuance of Option Shares upon the exercise of any Option.

 15.          Change of Control. 

(a)          Notwithstanding any other provision of the Plan to the contrary, and
unless and Option Agreement provides otherwise (or as may otherwise be required under Code Section 409A), in the event of a Change of Control, all Options outstanding as of the date of such Change of Control shall become fully vested and
exercisable, whether or not then otherwise vested and exercisable. 

(b)          Notwithstanding the foregoing, in the event of a merger, share exchange,
reorganization or other business combination affecting the Company, the Board may, in its sole and absolute discretion, determine that any or all Options granted pursuant to the Plan shall not vest or become exercisable on an accelerated basis, if
the Company or the surviving or acquiring corporation, as the case may be, shall have taken such action, including but not limited to the assumption of Options granted under the Plan or the grant of substitute options (in either case, with
substantially similar terms or equivalent economic benefits as Options granted under the Plan), as in the opinion of the Board is equitable or appropriate to protect the rights and interests of participants under the Plan. 

16.          Restrictions. The Company may impose such restrictions on Options,
shares and any other benefits underlying Options hereunder as it may deem advisable, including without limitation restrictions under the federal securities laws, the requirements of any stock exchange or similar organization and any blue sky, state
or foreign securities laws applicable to such securities. 

17.          Other Provisions. The following provisions are also in effect under
the Plan: 
 (a)          The use of a masculine gender in the Plan shall also
include within its meaning the feminine, and the singular may include the plural, and the plural may include the singular, unless the context clearly indicates to the contrary. 

(b)          Any expenses of administering the plan shall be borne by the Company.

 (c)          This Plan shall be construed to be in addition to any and all
other compensation plans or programs. The adoption of the Plan by the shareholders of the Company shall not be construed as creating any limitations on the power or authority of the Board to adopt such other additional incentive or other
compensation arrangements as the Board may deem necessary or desirable. 

(d)          The corporate laws of the State of Colorado shall govern all issues
concerning the relative rights of the Company and its shareholders under the Plan. All other questions and obligations under the Plan shall be construed and enforced in accordance with the internal laws of the State of California, without giving
effect to any choice of law or conflict of law provision or rule (whether of the State of California or any other jurisdiction) that would cause the application of the laws of any jurisdiction other than the State of California. 

  
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 (e)          Notwithstanding anything to
the contrary contained in this Plan, this Plan is intended to comply with the California Corporate Securities Law of 1968 and the rules and regulations promulgated thereunder. 
 (f)          If any provision of the Plan shall be held illegal or invalid for any reason, such illegality or invalidity shall not affect the remaining
parts of the Plan, and the Plan shall be construed and enforced as if the illegal or invalid provision had not been included. 

(g)          Headings are given to the sections of this Plan solely as a convenience to
facilitate reference. The reference to any statute, regulation or other provision of law shall be construed to refer to any amendment to or successor of such provision of law. 
 (h)          The Plan shall be binding upon the Company, its successors and assigns, and Optionees, their executors, administrators and permitted
transferees and beneficiaries. 

  
 8EX-10.1

 Exhibit 10.1 

STOCK PURCHASE AGREEMENT, dated February 9, 2012 (this “Agreement”), by and among PostRock Energy
Corporation, a Delaware corporation (the “Company”), White Deer Energy L.P., a Cayman Islands exempted limited partnership (“White Deer”), White Deer Energy TE L.P., a Cayman Islands exempted limited partnership
(“White Deer TE”) and White Deer Energy FI L.P. a Cayman Islands exempted limited partnership (together with White Deer and White Deer TE, the “Investors” and each an “Investor”). 

Recitals: 

A. The Company. As of the date hereof, the Company has 40,000,000 authorized shares of Common Stock, $0.01 par value per share
(“Common Stock”), and 5,000,000 authorized shares of Preferred Stock, $0.01 par value per share (“Preferred Stock”). 
 B. The Issuance. The Company intends to issue to the Investors in a private placement 2,180,233 shares of Common Stock (the “Purchased Securities”), and the Investors intend to
purchase from the Company the Purchased Securities. 
 NOW, THEREFORE, in consideration of the premises, and of the
representations, warranties, covenants and agreements set forth herein, the parties hereto agree as follows: 
 ARTICLE I

 Purchase; Closing; Closing Transactions 
 1.1 Purchase. At the Closing, on the terms and subject to the conditions set forth in this Agreement, the Company is issuing and selling to each of Investors, and each of the Investors is
purchasing, severally and not jointly, from the Company (collectively, the sales of all of the Purchased Securities hereunder, the “Purchase”) the number of shares of Common Stock set forth opposite such Investor’s name on
Schedule 1.1, for a purchase price of $3.44 per share of Common Stock (which the parties hereto agree is the consolidated closing bid price per share of Common Stock as of the business day immediately prior to the date hereof) and for an
aggregate purchase price of $7,500,001.52, by wire transfer of immediately available funds to a bank account designated by the Company. 
 1.2 Closing. On the terms and subject to the conditions set forth in this Agreement, the closing of the Purchase (the “Closing”) is taking place at the offices of Vinson &
Elkins LLP, 666 Fifth Avenue, 26th Floor, New York, New
York 10103, concurrently with the execution and delivery of this Agreement. The date on which the Closing occurs is referred to in this Agreement as the “Closing Date.” 

1.3 Closing Transactions . At the Closing, subject to the satisfaction or waiver of each of the conditions specified below:

 (i) the Company is duly executing and delivering to each of the Investors one or more
certificates, dated as of the Closing Date and bearing appropriate legends as hereinafter provided for, representing all of the Purchased Securities set forth opposite such Investor’s name on Schedule 1.1, in each case against payment of
the aggregate purchase price therefor as set forth in Section 1.1; 
 (ii) the Company is duly executing and delivering to the
Investors, and each of the Investors is duly executing and delivering to the Company, an Amendment No. 1 to the First Amended and Restated Registration Rights Agreement (the “Registration Rights Amendment”) in the form of
Annex A; 
 (iii) the Company is delivering to the Investors a good standing certificate with respect to the Company
issued by the Secretary of State of the State of Delaware, dated as of a recent date; 
 (iv) the Company is delivering to the
Investors a certificate, executed on behalf of the Company by its Secretary, dated as of the Closing Date, (a) certifying the resolutions adopted by the Independent Majority of the board of directors of the Company approving this Agreement, the
Registration Rights Amendment, the Transactions and the issuance of the Purchased Securities, (b) certifying the current versions of the Certificate of Incorporation and by-laws of the Company and (c) certifying as to the signatures and
authority of persons signing the Transaction Documents and related documents on behalf of the Company; and 
 (v) the Company is
delivering all other documents, certificates, instruments and writings reasonably requested by any of the Investors or their counsel prior to the Closing as may be necessary or advisable in connection with the consummation of any of the
Transactions. 
 ARTICLE II 
 Definitions 
 2.1 Defined Terms. For the purposes of this Agreement
the following words and phrases shall have the following meanings: 
 (a) “2010 Purchase Agreement” means the
Securities Purchase Agreement, dated September 2, 2010, by and among the Company and the Investors. 
 (b)
“Affiliate” means, with respect to any person, any person directly or indirectly controlling, controlled by or under common control with, such other person. For purposes of this definition, “control” when used with respect
to any person, means the possession, directly or indirectly, of the power to cause the direction of management or policies of such person, whether through the ownership of voting securities, by contract or otherwise. For purposes hereof, the
Company’s Affiliates shall be deemed not to include the White Deer Group (as such term is defined in the 2010 Purchase Agreement, other than the Company and its Subsidiaries). 

  
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 (c) “Certificate of Incorporation” means the Company’s restated
certificate of incorporation (together with any certificates of designation) in effect at the time as of which any determination is being made. 
 (d) “Governmental Entity” means any (i) federal, state, local, municipal, foreign or other government (or agency thereof), (ii) governmental, quasi-governmental or regulatory
authority of any nature (including any governmental agency, branch, department or other entity and any court or other tribunal), (iii) multinational organization or (iv) body exercising, or entitled to exercise, any administrative,
executive, judicial, legislative, police, regulatory or taxing authority or power any nature. 
 (e) “Independent
Majority” means a majority of the members of the board of directors of the Company who are neither Investor Directors (as such term is defined in the 2010 Purchase Agreement) nor employees of the Company. 

(f) “Nasdaq” means NASDAQ OMX Group Inc. 
 (g) “Securities Act” means the Securities Act of 1933. 
 (h)
“Subsidiary” means, with respect to any person, those entities of which such person owns or controls more than 50% of the outstanding equity securities either directly or through an unbroken chain of entities as to each of which
more than 50% of the outstanding equity securities is owned directly or indirectly by its parent. 
 (i) “Transaction
Documents” means, collectively, this Agreement and the Registration Rights Amendment, in each case, as amended, modified or supplemented from time to time in accordance with their respective terms. 

(j) “Transactions” means the transactions contemplated by the Transaction Documents, including the Purchase. 

2.2 Other Terms. For purposes of this Agreement, the following terms shall have the meaning specified in the Sections indicated
below: 
  

			
	 Term
	  	Location of Definition
	 Agreement
	  	Preamble
	 Bankruptcy Exception
	  	3.1(d)(i)
	 business day
	  	5.12
	 Closing
	  	1.2
	 Closing Date
	  	1.2
	 Common Stock
	  	Recital A
	 Company
	  	Preamble
	 Investor(s)
	  	Preamble
	 Investor Indemnified Parties
	  	4.5(a)
	 Losses
	  	4.5(a)
	 Preferred Stock
	  	Recital A

  
 3 

  

			
	 Term
	  	Location of Definition
	 Purchase
	  	1.1
	 Purchased Securities
	  	Recital B
	 Registration Rights Amendment
	  	1.3(i)
	 Representative
	  	2.3(d)
	 White Deer
	  	Preamble
	 White Deer TE
	  	Preamble

 ARTICLE III 
 Representations and Warranties 
 3.1 Representations and Warranties of
the Company. The Company represents and warrants to the Investors that as of the date hereof (or such other date specified herein): 
 (a) Organization and Authority. The Company has been duly incorporated and is validly existing as a corporation in good standing under the laws of the State of Delaware, with corporate power and
authority to own its properties and conduct its business as currently conducted, and has been duly qualified as a foreign corporation for the transaction of business and is in good standing under the laws of each other jurisdiction in which it owns
or leases properties, or conducts any business so as to require such qualification. 
 (b) Capitalization. The authorized
capital stock of the Company consists of 40,000,000 shares of Common Stock, of which 9,935,337 shares are issued and outstanding, and 5,000,000 shares of Preferred Stock, of which 6,000 shares of Series A Cumulative Redeemable Preferred Stock are
issued or outstanding and 215,662.45 shares of Series B Voting Preferred Stock are issued and outstanding. Schedule 3.1(b) sets forth all of the options, warrants and equity incentive plans of the Company, and the number of shares of Common
Stock reserved for issuance pursuant to any outstanding options, warrants or equity incentive plans. The outstanding shares of the Company’s capital stock have been duly authorized and are validly issued and outstanding, fully paid and
non-assessable, are not subject to preemptive rights (and were not issued in violation of any preemptive rights) and were issued in full compliance with applicable state and federal securities laws and any rights of third parties. Except as provided
in the 2010 Purchase Agreement, no person is entitled to preemptive or similar statutory or contractual rights with respect to any securities of the Company. Except as set forth above or on Schedule 3.1(b), there are no outstanding warrants,
options, convertible securities or other rights, agreements or arrangements of any character under which the Company or any of its Subsidiaries is or may be obligated to issue any equity securities of any kind and, except as contemplated by this
Agreement, neither the Company nor any of its Subsidiaries is currently in negotiations for the issuance of any equity securities of any kind. The issuance and sale of the Purchased Securities hereunder will not obligate the Company to issue shares
of Common Stock or other securities to any other person (other than the Investors) and will not result in the adjustment of the exercise, conversion, exchange or reset price of any outstanding security. 

  
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 (c) Purchased Securities. The Purchased Securities have been duly and validly
authorized, and, when issued and delivered pursuant to this Agreement, the Purchased Securities will be duly and validly issued, fully paid and non-assessable. 
 (d) Authorization, Enforceability. 
 (i) The Company has the corporate power
and authority to execute and deliver this Agreement and the Registration Rights Amendment and to carry out its obligations hereunder (which includes the issuance of the Purchased Securities) and thereunder. The execution, delivery and performance by
the Company of this Agreement and the Registration Rights Amendment and the consummation of the Transactions have been duly authorized by all necessary corporate action on the part of the Company, and no further approval or authorization is required
on the part of the Company. This Agreement and the Registration Rights Amendment are or will be valid and binding obligations of the Company enforceable against the Company in accordance with their respective terms, except as the same may be limited
by applicable bankruptcy, insolvency, reorganization, fraudulent transfer or conveyance, moratorium or similar laws affecting the enforcement of creditors’ rights generally and general equitable principles, regardless of whether such
enforceability is considered in a proceeding at law or in equity (“Bankruptcy Exceptions”). 
 (ii) Except as
set forth on Schedule 3.1(d), the execution, delivery and performance by the Company of this Agreement and the Registration Rights Amendment, compliance by the Company with any of the provisions hereof or thereof and the consummation of the
Transactions, will not (i) violate, conflict with, or result in a breach of any provision of, or constitute a default (or an event which, with notice or lapse of time or both, would constitute a default) under, or result in the termination of,
accelerate the performance required by, or result in any payment obligations under, or result in a right of termination, acceleration or payment of, or result in the creation of, any lien, security interest, charge or encumbrance upon any of the
properties or assets of the Company or any of its Subsidiaries under any of the terms, conditions or provisions of (A) the Certificate of Incorporation or by-laws of the Company or (B) any material note, bond, mortgage, indenture, deed of
trust, license, lease, agreement or other instrument or obligation to which the Company or any of its Subsidiaries is a party or by which it or any of its Subsidiaries may be bound, or to which the Company or any of its Subsidiaries or any of the
properties or assets of the Company or any of its Subsidiaries may be subject, including as a result of any change of control or similar provision (except for violations, conflicts, breaches or defaults that would not be reasonably likely to be
material to the Company and its Subsidiaries, taken as a whole) or (ii) subject to compliance with the statutes and regulations referred to in the next paragraph, materially violate (x) any statute, rule or regulation or any judgment,
ruling, order, writ, injunction or decree or (y) any rule related to the qualification, listing and delisting of companies on the Nasdaq Stock Market, in each case applicable to the Company or any of its Subsidiaries or any of their respective
properties or assets. 
 (e) Other than the filing of any current report on Form 8-K and a Form D required to be filed with the
Securities and Exchange Commission, and such as have been made or obtained, no notice to, filing with, exemption or review by, or authorization, consent or approval of, any Governmental Entity is required to be made or obtained by the Company in
connection with the consummation of the Transactions. 

  
 5 

 (f) Brokers or Finders. The Company represents as to itself, its predecessors and its
Affiliates, that no agent, broker, investment banker or other firm or person is or will be entitled to any broker’s or finder’s fee or any other commission or similar fee in connection with the Purchase. 

(g) No Directed Selling Efforts or General Solicitation. Neither the Company nor any person acting on its behalf has conducted any
general solicitation or general advertising (as those terms are used in Regulation D of the Securities Act) in connection with the offer or sale of any of the Purchased Securities. 

(h) No Integrated Offering. Neither the Company nor any of its Affiliates, nor any person acting on its or their behalf has, directly
or indirectly, made any offers or sales of any Company security or solicited any offers to buy any security, under circumstances that would adversely affect reliance by the Company on Section 4(2) of the Securities Act for the exemption from
registration for the transactions contemplated hereby or would require registration of the Purchased Securities under the Securities Act. 
 (i) Private Placement. Assuming the accuracy of the representations of the Investors in Section 3.2(c), the offer and sale of the Purchased Securities to the Investors as contemplated hereby is
exempt from the registration requirements of the Securities Act. 
 3.2 Representations and Warranties of the Investors.
The Investors, jointly and severally, hereby represent and warrant to the Company that as of the date hereof: 
 (a)
Status. Each Investor has been duly organized and is validly existing as an exempted limited partnership under the laws of the Cayman Islands, with the limited partnership power and authority to own its properties and conduct its business as
currently conducted. 
 (b) Authorization, Enforceability. 

(i) Each Investor, acting through its general partner, has the limited partnership power and authority to execute and deliver this
Agreement and the Registration Rights Amendment and to carry out its obligations hereunder and thereunder. The execution, delivery and performance by each Investor of this Agreement and the Registration Rights Amendment and the consummation of the
transactions contemplated hereby and thereby have been duly authorized by such Investor’s general partner and all other necessary limited partnership acting on the part of such Investor, and no further approval or authorization is required on
the part of such Investor or any other party for such authorization to be effective. This Agreement and the Registration Rights Amendment are or will be valid and binding obligations of each Investor enforceable against such Investor in accordance
with their respective terms, except as the same may be limited by Bankruptcy Exceptions. 

  
 6 

 (ii) The execution, delivery and performance by each Investor of this Agreement and the
Registration Rights Amendment and the consummation of the transactions contemplated hereby and thereby and compliance by such Investor with any of the provisions hereof and thereof, will not (i) violate, conflict with, or result in a breach of
any provision of, or constitute a default (or an event which, with notice or lapse of time or both, would constitute a default) under, or result in the termination of, or accelerate the performance required by, or result in a right of termination or
acceleration of, or result in the creation of, any lien, security interest, charge or encumbrance upon any of the properties or assets of such Investor under any of the terms, conditions or provisions of (A) its organizational documents or
(B) any note, bond, mortgage, indenture, deed of trust, license, lease, agreement or other instrument or obligation to which such Investor is a party or by which it may be bound, or to which such Investor or any of the properties or assets of
such Investor may be subject, or (ii) violate any statute, rule or regulation or any judgment, ruling, order, writ, injunction or decree applicable to such Investor or any of its properties or assets. 

(iii) Other than such as have been made or obtained, no notice to, filing with, exemption or review by, or authorization, consent or
approval of, any Governmental Entity is required to be made or obtained by any Investor in connection with the consummation by such Investor of the Purchase. 
 (c) Purchase for Investment. Each Investor acknowledges that the offering and sale of the Purchased Securities have not been registered under the Securities Act or under any state securities laws.
Each Investor (i) is acquiring the Purchased Securities pursuant to an exemption from registration under the Securities Act solely for investment with no present intention to distribute them to any person in violation of the Securities Act or
any applicable U.S. state securities laws, (ii) will not sell or otherwise dispose of any of the Purchased Securities, except in compliance with the registration requirements or exemption provisions of the Securities Act and any applicable U.S.
state securities laws, (iii) has such knowledge and experience in financial and business matters and in investments of this type that it is capable of evaluating the merits and risks of the Purchase and of making an informed investment
decision, and has conducted a review of the business and affairs of the Company that it considers sufficient and reasonable for purposes of making the Purchase, and (iv) is an “accredited investor” (as that term is defined by Rule 501
under the Securities Act). 
 (d) Company Representations. Each of the Investors acknowledges and agrees that
(1) other than as expressly set forth in Section 3.1 hereof, neither the Company nor any of its directors, officers, shareholders, employees, Affiliates, agents, advisors or representatives (collectively,
“Representatives”) is making or has made any representations or warranties, written or oral, statutory, express or implied, concerning the Company, its Subsidiaries, their respective businesses or assets or any aspect of the
Transactions and (2) such Investor has not been induced by and has not relied upon any representations, warranties or statements, whether written or oral, statutory, express or implied, made by the Company or any of its Representatives that are
not expressly set forth in Section 3.1 hereof. 

  
 7 

 ARTICLE IV 
 Covenants and Additional Agreements 
 4.1 Further Assurances. At any
time and from time to time after the Closing, at the request of any Investor, the Company shall execute and deliver such further documents, and perform such further acts, as may be reasonably necessary in order to effectively transfer and convey the
applicable Purchased Securities to each of the Investors, on the terms herein contained, and to otherwise comply with the terms of this Agreement and consummate the Transactions. 

4.2 Expenses. 
 (a) At any time and from time to time after the Closing, the Company shall reimburse the Investors for their reasonable costs and expenses, including reasonable legal or other professional fees and
expenses, and reasonable out-of-pocket due diligence expenses, incurred or made (i) in connection with this Agreement and the Transactions (including any reasonable cost and expenses incurred after the Closing to the extent related) and
(ii) in connection with any amendments to the Transaction Documents. Prior to any such reimbursement, the Investors shall provide the Company with reasonably detailed invoices setting forth the expenses to be reimbursed and, within 30 days
thereof, the Company shall pay the applicable amount by a wire transfer of immediately available funds as designated by the Investors. 
 (b) The Company shall reimburse the Investors for their reasonable out-of-pocket costs and expenses (including airfare, hotels and cab fare) incurred or made in connection with ongoing oversight of the
Company during the period commencing on September 21, 2011 and ending the later of (i) the first anniversary of the Closing Date and (ii) the first date on which the Investors, on the one hand, or the Independent Majority, on the
other hand, provide good faith written notice to the other that the Investors’ ongoing oversight of the Company has ceased to provide sufficient value to the stockholders of the Company to justify such reimbursement. Prior to any such
reimbursement, the Investors shall provide the Company with reasonably detailed invoices setting forth the expenses to be reimbursed and a good faith attestation that such costs were incurred in the course of conducting work for the benefit of all
Company shareholders. Reimbursements shall be made within 30 days of the invoices having been presented to the Company. 
 4.3
Transfer Restrictions. The Purchased Securities are restricted securities under the Securities Act and may not be offered or sold except pursuant to an effective registration statement or an available exemption from registration under the
Securities Act. Accordingly, each Investor agrees it shall not, directly or through others, offer or sell any Purchased Securities except pursuant to a registration statement or pursuant to Rule 144 or another exemption from registration under the
Securities Act, if available. Prior to any transfer of Purchased Securities other than pursuant to an effective registration statement, each Investor agrees it shall notify the Company of such transfer and the 

  
 8 

 
Company may require such Investor to provide, prior to such transfer, such evidence that the transfer will comply with the Securities Act (including written representations and an opinion of
counsel) as the Company may reasonably request. The Company may impose stop-transfer instructions with respect to any securities that are to be transferred in contravention of this Agreement. 

4.4 Legend. Each Investor agrees that all certificates or other instruments representing Purchased Securities will bear a legend
substantially to the following effect: 
 “THE SECURITIES REPRESENTED BY THIS INSTRUMENT HAVE NOT BEEN REGISTERED UNDER THE
SECURITIES ACT OF 1933, AS AMENDED, OR THE SECURITIES LAWS OF ANY STATE AND MAY NOT BE TRANSFERRED, SOLD OR OTHERWISE DISPOSED OF EXCEPT WHILE A REGISTRATION STATEMENT RELATING THERETO IS IN EFFECT UNDER SUCH ACT AND APPLICABLE STATE SECURITIES LAWS
OR PURSUANT TO AN EXEMPTION FROM REGISTRATION UNDER SUCH ACT OR SUCH LAWS. THIS INSTRUMENT IS ISSUED PURSUANT TO AND SUBJECT TO THE RESTRICTIONS ON TRANSFER AND OTHER PROVISIONS OF THE STOCK PURCHASE AGREEMENT, DATED FEBRUARY 9, 2012, AS AMENDED
FROM TIME TO TIME, AMONG THE ISSUER OF THESE SECURITIES AND THE INVESTORS REFERRED TO THEREIN, A COPY OF WHICH IS ON FILE WITH THE ISSUER. THE SECURITIES REPRESENTED BY THIS INSTRUMENT MAY NOT BE SOLD OR OTHERWISE TRANSFERRED EXCEPT IN COMPLIANCE
WITH SAID AGREEMENT. ANY SALE OR OTHER TRANSFER NOT IN COMPLIANCE WITH SAID AGREEMENT WILL BE VOID.” 
 In the event that (i) any
Purchased Securities become registered under the Securities Act or (ii) Purchased Securities are eligible to be transferred without restriction in accordance with Rule 144 under the Securities Act, the Company shall issue new certificates or
other instruments representing such Purchased Securities, which shall not contain such portion of the above legend that is no longer applicable; provided that the Investors surrender to the Company the previously issued certificates or other
instruments. 
 4.5 Indemnification. 
 (a) Indemnification by the Company. From and after the Closing, the Company shall indemnify and hold harmless the Investors and their respective Affiliates and their respective directors, officers,
employees and agents (the “Investor Indemnified Parties”) from and against any and all losses, claims, damages, liabilities and expenses (including without limitation reasonable attorney fees and disbursements and other expenses
reasonably incurred in connection with investigating, preparing or defending any action, claim or proceeding, pending 

  
 9 

 
or threatened and the costs of enforcement thereof) (collectively, “Losses”) asserted against or incurred by such Investor Indemnified Party to the extent arising out of or in
connection with (i) any breach of the representations or warranties of the Company set forth in this Agreement or (ii) any breach or violation of the covenants or agreements of the Company set forth in this Agreement. 

(b) Indemnification by the Purchasers. From and after the Closing, each of the Investors shall, severally but not jointly,
indemnify and hold the Company harmless from and against all Losses asserted against or incurred by the Company to the extent arising out of or in connection with (i) any breach of the representations or warranties of such Investor set forth in
this Agreement or (ii) any breach or violation of the covenants or agreements of such Investor set forth in this Agreement. 

(c) No Duplication. Any liability for indemnification under this Agreement shall be determined without duplication of recovery by
reason of the state of facts giving rise to such liability constituting a breach or violation of more than one representation, warranty, covenant or agreement. 
 (d) Sole Remedy. The parties agree that the sole and exclusive remedy of any party to this Agreement or any Investor Indemnified Parties, the events giving rise to this Agreement and the
transactions provided for in this Agreement (excluding, for the avoidance of doubt, the transactions provided for in the Registration Rights Amendment), shall be limited to the indemnification provisions set forth in this Section 4.5 and, in
furtherance of the foregoing, each of the parties, on behalf of itself and its Affiliates, waives and releases the other parties to this Agreement (and such other parties’ Affiliates) from, to the fullest extent permitted under any applicable
law, any and all rights, claims and causes of action it or its Affiliates may have against the other parties to this Agreement in connection with the events giving rise to this Agreement and the transactions provided for in this Agreement
(excluding, for the avoidance of doubt, the transactions provided for in the Registration Rights Amendment), except pursuant to the indemnification provisions set forth in this Section 4.5; provided, however, that nothing herein
shall limit in any way any such party’s remedies in respect of fraud, intentional misrepresentation or omission or intentional misconduct by the other parties in connection herewith or the Transactions. 

(e) NO SPECIAL DAMAGES. IN NO EVENT SHALL ANY PARTY BE LIABLE UNDER THIS SECTION 4.5 OR OTHERWISE IN RESPECT OF THIS AGREEMENT
(EXCLUDING, FOR THE AVOIDANCE OF DOUBT, THE REGISTRATION RIGHTS AMENDMENT) FOR EXEMPLARY, SPECIAL, PUNITIVE, INDIRECT, REMOTE, SPECULATIVE OR CONSEQUENTIAL DAMAGES EXCEPT TO THE EXTENT ANY SUCH PARTY SUFFERS SUCH DAMAGES TO AN UNAFFILIATED THIRD
PARTY IN CONNECTION WITH A LOSS, IN WHICH EVENT SUCH DAMAGES SHALL BE RECOVERABLE; PROVIDED, HOWEVER, THAT THE INVESTOR INDEMNIFIED PARTIES SHALL BE ENTITLED TO RECOVER FROM THE COMPANY ANY AMOUNTS FOR LOSSES TO THE EXTENT NECESSARY TO
COMPENSATE THE INVESTOR INDEMNIFIED PARTIES IN FULL FOR THE DIMINUTION IN VALUE OF ITS INVESTMENT IN THE COMPANY IF SUCH LOSSES RESULT FROM AN INDEMNIFIABLE CLAIM COVERED BY SECTION 4.5(a). 

  
 10 

 4.6 Subsequent Investment. Each of the parties hereto acknowledges and agrees that
the Purchase shall be in partial satisfaction of the Investors’ obligations pursuant to Section 4.5 of the 2010 Purchase Agreement, and the aggregate purchase price hereunder of $7,500,001.52 shall count toward to the amount specified in
Section 4.5 of the 2010 Purchase Agreement. 
 4.7 Restrictions on Sale of Common Stock. Each of the Investors
agrees that the Purchased Securities shall be “Excluded Securities” as defined in, and for purposes of, the 2010 Purchase Agreement. 
 ARTICLE V 
 Miscellaneous 

5.1 Amendment. No amendment of any provision of this Agreement shall be effective unless made in writing and signed by a duly
authorized representative of each party. 
 5.2 Waivers. Any failure by any party to comply with any of its obligations,
agreements or covenants herein may be waived by the party to whom such compliance is owed. No waiver will be effective unless it is in a writing signed by a duly authorized officer or representative of the waiving party that makes express reference
to the provision or provisions subject to such waiver. A waiver of any breach or failure to enforce any of the terms or conditions of this Agreement shall not in any way affect, limit or waive a party’s rights hereunder at any time to enforce
strict compliance thereafter with every term or condition of this Agreement. 
 5.3 Counterparts and Facsimile. For the
convenience of the parties hereto, this Agreement may be executed in any number of separate counterparts, each such counterpart being deemed to be an original instrument, and all such counterparts will together constitute the same agreement.
Executed signature pages to this Agreement may be delivered by PDF (Portable Document Format) or facsimile and such PDFs or facsimiles will be deemed as sufficient as if actual signature pages had been delivered. 

5.4 Governing Law; Submission to Jurisdiction, Etc. This Agreement shall be governed by and construed in accordance with the laws
of the State of New York applicable to contracts made and to be performed entirely within such State, without giving effect to any choice of law or conflict of law rules or provisions that would cause the application of the laws of any other
jurisdiction. With respect to any lawsuit or claim arising out of or in connection with this Agreement or the Registration Rights Amendment, each of the parties hereto agrees (a) to submit to the personal jurisdiction of the State or Federal
courts in the Borough of Manhattan, the City of New York, (b) that jurisdiction and venue shall lie in the 

  
 11 

 
State or Federal courts in the State of New York, and (c) that notice may be served upon such party at the address and in the manner set forth for such party in Section 5.6. TO THE
EXTENT PERMITTED BY APPLICABLE LAW, EACH OF THE PARTIES HERETO HEREBY UNCONDITIONALLY WAIVES TRIAL BY JURY IN ANY LEGAL ACTION OR PROCEEDING RELATING TO THE TRANSACTION DOCUMENTS OR THE TRANSACTIONS CONTEMPLATED HEREBY OR THEREBY. 

5.5 Specific Performance. The parties hereto agree that irreparable damage would occur if any of the provisions of this Agreement
were not performed in accordance with their specific terms or were otherwise breached. It is accordingly agreed that each of the parties hereto shall be entitled to an injunction or injunctions to prevent breaches of this Agreement and to enforce
specifically the terms and provisions of this Agreement, without the necessity of proving the inadequacy of money damages as a remedy, in addition to any other remedy at law or in equity. 

5.6 Notices. Any notice, request, instruction or other document to be given hereunder by any party to the other will be in writing
and will be deemed to have been duly given (a) on the date of delivery if delivered personally or by facsimile (transmission confirmed), or (b) on the second business day following the date of dispatch if delivered by a recognized next day
courier service. All notices hereunder shall be delivered as set forth below, or pursuant to such other instructions as may be designated in writing by the party to receive such notice. 

(a) If to the Investors: 
 c/o White Deer Energy L.P. 
 667 Madison Ave, 4th Floor 

New York, New York 10065 
 Attention: Thomas J. Edelman 
 Facsimile: (212) 888-6877 

and 
 c/o White
Deer Energy L.P. 
 700 Louisiana, Suite 4770 
 Houston, Texas 77002 
 Attention: James E. Saxton 

Facsimile: (713) 581-6901 
 (b) If to the Company: 
 PostRock Energy Corporation 

210 Park Avenue, Suite 2750 
 Oklahoma City, OK 73102 
 Attention: Terry W. Carter 

  
 12 

 Telephone: (405) 702-7487 

Facsimile: (405) 702-7756 
 and 
 PostRock Energy Corporation 

210 Park Avenue, Suite 2750 
 Oklahoma City, OK 73102 
 Attention: Stephen DeGiusti 

Telephone: (405) 702-7487 
 Facsimile: (405) 702-7756 
 5.7 Publicity. Except as set forth below,
no public release or announcement concerning the Transactions shall be issued by the Company, its Subsidiaries or the Investors without the prior consent of the Company (in the case of a release or announcement by the Investors) or the Investors (in
the case of a release or announcement by the Company or its Subsidiaries) (which consents shall not be unreasonably withheld, conditioned or delayed), except as such release or announcement may be required by law or the applicable rules or
regulations of any securities exchange or securities market, in which case the affected party shall allow the other parties hereto, to the extent reasonably practicable in the circumstances, reasonable time to comment on such release or announcement
in advance of such issuance. The Company shall by 8:30 a.m. (New York City time) on the fourth trading day immediately following the date of this Agreement file a Current Report on Form 8-K disclosing the execution and delivery of
this Agreement as well as copies of the Transaction Documents. In addition, the Company will make such other filings and notices in the manner and time required by applicable law or the Securities and Exchange Commission or Nasdaq. 

5.8 Entire Agreement, Etc. This Agreement (including the Annexes and Schedules hereto) and the Registration Rights Amendment
constitute the entire agreement, and supersede all other prior agreements (other than the 2010 Purchase Agreement and the agreements executed in connection therewith), understandings, representations and warranties, both written and oral, among the
parties hereto, with respect to the subject matter hereof. For the avoidance of doubt, each of the parties hereto hereby acknowledges that the 2010 Purchase Agreement shall remain in full force and effect in accordance with its terms except as
expressly modified herein. 
 5.9 Assignment. Neither this Agreement nor any right, remedy, obligation nor liability
arising hereunder or by reason hereof shall be assignable by any party hereto without the prior written consent of the other parties, and any attempt to assign any right, remedy, obligation or liability hereunder without such consent shall be void.
This Section 5.9 applies only to an assignment of this Agreement and the rights, remedies, obligations and liabilities arising hereunder and does not apply to a sale, transfer or assignment of Purchased Securities, which is addressed in
Section 4.3. 

  
 13 

 5.10 Severability. If any provision of this Agreement or the Registration Rights
Amendment, or the application thereof to any person or circumstance, is determined by a court of competent jurisdiction to be invalid, void or unenforceable, the remaining provisions hereof, or the application of such provision to persons or
circumstances other than those as to which it has been held invalid or unenforceable, will remain in full force and effect and shall in no way be affected, impaired or invalidated thereby, so long as the economic or legal substance of the
Transactions is not affected in any manner materially adverse to any party. Upon such determination, the parties hereto shall negotiate in good faith in an effort to agree upon a suitable and equitable substitute provision to effect the original
intent of the parties hereto. 
 5.11 No Third Party Beneficiaries. Nothing contained in this Agreement, expressed or
implied, is intended to confer upon any person or entity other than the Company and the Investors (and any persons to whom an Investor has transferred its rights hereunder in accordance with this Agreement), any benefits, rights, or remedies.

 5.12 Interpretation. When a reference is made in this Agreement to “Recitals,” “Articles,”
“Sections” or “Annexes,” such reference shall be to a Recital, Article or Section of, or Annex to, this Agreement unless otherwise indicated. The terms defined in the singular have a comparable meaning when used in the plural,
and vice versa. References to “herein”, “hereof”, “hereunder” and the like refer to this Agreement as a whole and not to any particular section or provision, unless the context requires otherwise. The table of contents
and headings contained in this Agreement are for reference purposes only and are not part of this Agreement. Whenever the words “include,” “includes” or “including” are used in this Agreement, they shall be deemed
followed by the words “without limitation.” The parties hereto have participated jointly in the negotiation and drafting of this Agreement. In connection with the interpretation or enforcement of this Agreement, this Agreement shall be
construed as if drafted jointly by the parties hereto and no presumption or burden of proof shall arise favoring or disfavoring any party by virtue of the authorship of any of the provisions of this Agreement. Time is of the essence for each and
every provision of this Agreement. All references to “$” or “dollars” mean the lawful currency of the United States of America. Except as expressly stated in this Agreement, all references to any statute, rule or regulation are
to the statute, rule or regulation as amended, modified, supplemented or replaced from time to time (and, in the case of statutes, include any rules and regulations promulgated under the statute) and to any section of any statute, rule or regulation
include any successor to the section. References to a “business day” shall mean any day except a Saturday, Sunday or other day on which (i) the Nasdaq stock market is not open for trading or (ii) commercial banks in the
State of New York or the State of Oklahoma are authorized or required by law or executive order to close. 

*        *        *      
  *        * 

  
 14 

 In Witness Whereof, this Agreement has been executed by the parties hereto as of the
date first herein above written. 
  

			
	
	POSTROCK ENERGY CORPORATION
		
	By:	 	/s/ Terry W. Carter
		 	Terry W. Carter
		 	President and Chief Executive Officer

 Signature Page to Securities Purchase Agreement 

  

			
	
	WHITE DEER ENERGY L.P.
		
	 By:
	 	Edelman & Guill Energy L.P., its general partner
		
	 By:
	 	Edelman & Guill Energy Ltd., its general partner
		
	By:	 	/s/ Thomas J. Edelman
		 	Name: Thomas J. Edelman
		 	Title: Director
	
	WHITE DEER ENERGY TE L.P.
		
	 By:
	 	Edelman & Guill Energy L.P., its general partner
		
	 By:
	 	Edelman & Guill Energy Ltd., its general partner
		
	By:	 	/s/ Thomas J. Edelman
		 	Name: Thomas J. Edelman
		 	Title: Director
	
	WHITE DEER ENERGY FI L.P.
		
	 By:
	 	Edelman & Guill Energy L.P., its general partner
		
	 By:
	 	Edelman & Guill Energy Ltd., its general partner
		
	By:	 	/s/ Thomas J. Edelman
		 	Name: Thomas J. Edelman
		 	Title: Director

 Signature Page to Securities Purchase Agreement 

 SCHEDULE 1.1 – PURCHASED SECURITIES

  

													
	Investor	  	 Number of

Shares of
 Common Stock
 Purchased
	 	  	 Price Per

Share
	 	  	Aggregate 
Purchase
Price	 
	 White Deer Energy L.P.
	  	 	2,039,527	  	  	$	3.44	  	  	$	7,015,972.88	  
	 White Deer Energy TE L.P.
	  	 	67,766	  	  	$	3.44	  	  	$	233,115.04	  
	 White Deer Energy FI L.P.
	  	 	72,940	  	  	$	3.44	  	  	$	25,0913.60	  
		  	  
	  
	 	  	  
	  
	 	  	  
	  
	 
	 Total
	  	 	2,180,233	  	  	$	3.44	  	  	$	7,500,001.52	  

 Schedule 1.1 – Purchased Securities

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