Document:

Form of Sale Participation Agreement

 Exhibit 4.10 
 SALE PARTICIPATION AGREEMENT 

(DATE)                      
                   
  

	To:	The Person whose name is 

	  	set forth on the signature page hereof 

 Dear
Sir or Madam: 
 Concurrently with entering into this letter agreement, you are entering into a Management Stockholder’s
Agreement with Energy Future Holdings Corp., a Texas corporation formerly known as “TXU Corp.” (the “Company”) and Texas Energy Future Holdings Limited Partnership, a Delaware limited partnership
(“Parent”) (the “Stockholder’s Agreement”) relating to (i) your acquisition or continued ownership of common stock, no par value, of the Company, including, without limitation, such common stock, no par
value, of the Company hereafter acquired upon the exercise of Options or subsequently issued to a Management Stockholder Entity pursuant to a distribution under the terms of the EFH Salary Deferral Plan (“Common Stock”) and/or
(ii) the grant by the Company to you of new options (the “Options”) to purchase shares of Common Stock. 

Parent hereby agrees with you as follows: 
 1. (a) In the event that at any time on or after the date hereof (i) Parent or (ii) any member of the Sponsor Group (as defined in the Stockholder’s Agreement) solely to the extent that
such member of the Sponsor Group is selling limited partnership units of Parent (“LP Units”) in connection with a sale (or series of related sales) of 50% or more of the outstanding LP Units to a transferee that is not an Affiliate
of any member of the Sponsor Group or a partner of Parent (each a “Selling Entity”) proposes to sell directly for cash or any other consideration (x) in the case of clause (i) any shares of Common Stock owned by Parent and
(y) in the case of clause (ii) any LP Units, in any transaction other than a Public Offering (as defined in the Stockholder’s Agreement) or a sale, directly or indirectly, to an Affiliate of Parent, then, unless such Selling Entity is
entitled to and does exercise the drag-along rights pursuant to Paragraph 7 below and a Drag Transaction (as defined below) is consummated, Parent will notify you or your Management Stockholder’s Estate or Management Stockholder’s Trust
(as such terms are defined in the Stockholder’s Agreement, and collectively with you, the “Management Stockholder Entities”), as the case may be, in writing (a “Notice”) of such proposed sale (a
“Proposed Sale”) specifying the principal terms and conditions of the Proposed Sale (the “Material Terms”) including (A) the number of Shares of Common Stock or LP Units proposed to be included in the Proposed
Sale, (B) the percentage of the outstanding Common Stock or LP Units at the time the Notice is given that is represented by the number of shares of Common Stock or LP Units proposed to be included in the Proposed Sale, (C) the price per
share of Common Stock subject to the Proposed Sale (where the event triggering the Notice is a sale of LP Units, such price per share of Common Stock shall be deemed to be equal to the price per LP Unit subject to the proposed sale, subject to
equitable adjustment for stock or unit dividends or splits, recapitalizations or similar events), including a description of any pricing formulae and of any non-cash consideration sufficiently detailed to permit the valuation thereof, (D) the
Tag Along Sale Percentage (as defined below) of the Selling Entity and (E) the name and address of the Person (as defined in the Stockholder’s Agreement) to whom the Common Stock or LP Units is proposed to be sold. 

 (b) If, within 10 Business Days after the delivery of Notice under Section 1(a),
Parent receives from a Management Stockholder Entity a written request (a “Request”) to include Common Stock held by such Management Stockholder Entity in the Proposed Sale (which Request shall be irrevocable except (a) as set
forth in clauses (c) and (d) of this Section 1 below or (b) if otherwise mutually agreed to in writing by the Management Stockholder Entity and Parent), the Common Stock held by such Management Stockholder Entities plus all
shares of Common Stock which you are then entitled to acquire under any unexercised portion of Options, to the extent such Option is then exercisable or would become exercisable as a result of the consummation of the Proposed Sale (not in any event
to exceed the Tag Along Sale Percentage of the Selling Entity multiplied by the total number of shares of Common Stock held by the Management Stockholder Entities in the aggregate, including all shares of Common Stock which you are then entitled to
acquire under any unexercised portion of Options, to the extent such Option is then exercisable or would become exercisable as a result of the consummation of the Proposed Sale) will be so included as provided herein. Promptly after the execution of
the definitive sale agreement, if any, for such Proposed Sale (the “Sale Agreement”), Parent will furnish each Management Stockholder Entity with a copy of the Sale Agreement, if any. For purposes of this Agreement, the “Tag
Along Sale Percentage” shall mean the fraction, expressed as a percentage, determined by dividing the number of shares of Common Stock or LP Units, as applicable, to be purchased from the Selling Entity by the total number of shares of
Common Stock or LP Units, as applicable, owned directly by the Selling Entity. 
 (c) Notwithstanding anything to the contrary
contained in this Agreement, if any of the economic terms of the Proposed Sale change, including without limitation if the per share price will be less than the per share price disclosed in the Notice, or any of the other principal terms or
conditions will be materially less favorable to the selling Management Stockholder Entities than those described in the Notice, Parent will provide written notice thereof to each Management Stockholder Entity who has made a Request and each such
Management Stockholder Entity will then be given an opportunity to withdraw the offer contained in such holder’s Request (by providing prompt (and in any event within five (5) Business Days; provided that, notwithstanding the foregoing, if
the proposed closing with respect to the Proposed Sale is to occur within five (5) Business Days or less, no later than three (3) Business Days prior to such closing) written notice of such withdrawal to Parent), whereupon such withdrawing
Management Stockholder Entity will be released from all obligations thereunder. 
 (d) If the Selling Entity does not complete
the Proposed Sale by the end of the 120th day following the date of the effectiveness of the Notice, each selling Management Stockholder Entity may elect on or prior to such date to be released on and after such date from all obligations under the
applicable Request by notifying Parent and any Selling Entity (if not Parent) in writing of its desire to so withdraw. Upon receipt of that withdrawal notice, the Notice of the relevant Management Stockholder Entity shall be null and void, and it
will then be necessary for a separate Notice to be furnished, and the terms and provisions of clauses (a) and (b) of this Paragraph 1 separately complied with, in order to consummate such Proposed Sale pursuant to this Paragraph 1, unless
the failure to complete such Proposed Sale resulted from any failure by any selling Management Stockholder Entity to comply with the terms of this Paragraph 1. 

  
 2 

 (e) Notwithstanding anything to the contrary in the foregoing provisions of this Paragraph
1, the Selling Entity may, in its sole discretion, decide whether or not to pursue, consummate, postpone or abandon the Proposed Sale and the terms and conditions thereof. None of the Company, the Selling Entities or any of their respective
Affiliates shall have any liability to any Management Stockholder Entity arising from, relating to or in connection with the pursuit, consummation, postponement, abandonment or terms and conditions of any such Proposed Sale. 

2. (a) The number of shares of Common Stock that you will be permitted to include in a Proposed Sale pursuant to a Request will be the
lesser of (A) the number of shares of Common Stock that you have offered to sell in the Proposed Sale as set forth in the Request and (B) the product of (i) the aggregate number of shares of Common Stock or LP Units, as applicable, to
be included in the Proposed Sale multiplied by (ii) a fraction the numerator of which is the number of shares of Common Stock owned by you plus all shares of Common Stock which you are then entitled to acquire under any
unexercised portion of Options, to the extent such Option is then exercisable or would become exercisable as a result of the consummation of the Proposed Sale and the denominator of which is the total number of shares of Common Stock owned by you
and all other Persons participating in such sale as tag-along sellers pursuant to Other Management Stockholders Agreements (as defined in the Stockholder’s Agreement) or other agreements (all such other participants, the “Tag Along
Sellers”) plus the total number of shares of Common Stock which you and such Tag Along Sellers are then entitled to acquire under any unexercised portion of Options, to the extent such Options are then exercisable or would become
exercisable as a result of the consummation of the Proposed Sale, plus all shares of Common Stock owned by Parent. Each Tag Along Seller shall be permitted to conditionally exercise then-exercisable Options such that if the Proposed Sale in
not consummated, such exercise shall be void and such Options shall remain exercisable on the same terms and conditions as prior to such conditional exercise. 
 (b) If one or more Tag Along Sellers elect not to include the maximum number of shares of Common Stock which such Tag Along Seller would have been permitted to include in a Proposed Sale pursuant to
Paragraph 2(a) (such non-included shares, the “Eligible Shares”), then you and each of the remaining Tag Along Sellers, or any of them, will have the right to sell in the Proposed Sale a number of additional shares of Common Stock
equal to your pro rata portion of the number of Eligible Shares, based on the relative number of shares of Common Stock then held by you and each such Tag Along Seller plus all shares of Common Stock which you and such Tag Along Seller are
then entitled to acquire under any unexercised portion of the Option, to the extent such Option is then exercisable or would become exercisable as a result of the consummation of the Proposed Sale. Such additional shares of Common Stock which you
and such Tag Along Seller propose to sell shall not be included in any calculation made pursuant to Paragraph 2(a) for the purpose of determining the number of shares of Common Stock which you will be permitted to include in a Proposed Sale.
Notwithstanding any of the foregoing, the Selling Entity will have the right to sell in the Proposed Sale additional shares of Common Stock or LP Units, as applicable, owned by it equal to the number, if any, of the total remaining Eligible Shares,
which will not be included in any calculation made pursuant to Paragraph 2(a) for the purpose of determining the number of shares of Common Stock which you will be permitted to include in a Proposed Sale. 

  
 3 

 3. Except as may otherwise be provided herein, shares of Common Stock subject to a Request
will be included in a Proposed Sale pursuant hereto and in any agreements with purchasers relating thereto on the same terms and subject to the same conditions applicable to the shares of Common Stock or LP Units which the Selling Entity proposes to
sell in the Proposed Sale. Such terms and conditions shall include, without limitation: the sale price; the payment of fees, commissions and expenses; the provision of, and customary representations and warranties as to, information reasonably
requested by the Selling Entity covering matters regarding the Management Stockholder Entities’ ownership of shares; and the provision of requisite indemnification; provided that any indemnification provided by the Management Stockholder
Entities shall be pro rata in proportion with the number of shares of Common Stock or LP units to be sold; provided, further, that no Management Stockholder Entity shall be required to (x) indemnify any Person for an amount, in
the aggregate, in excess of the gross proceeds received in such Proposed Sale, or (y) agree to any non-compete or non-solicit provisions that are more restrictive than such similar agreement between the Company and the applicable Management
Stockholder. Notwithstanding anything to the contrary in the foregoing, if the consideration payable for shares of Common Stock is securities and the acquisition of such securities by a Management Stockholder Entity would reasonably be expected to
be prohibited under U.S., foreign or state securities laws, such Management Stockholder Entity shall be entitled to receive an amount in cash equal to the value of any such securities such Person would otherwise be entitled to receive. 

4. Upon delivering a Request, the Management Stockholder Entities will, if requested by Parent, execute and deliver a custody agreement
and power of attorney in form and substance reasonably satisfactory to Parent with respect to the shares of Common Stock which are to be sold by the Management Stockholder Entities pursuant hereto (a “Custody Agreement and Power of
Attorney”). The Custody Agreement and Power of Attorney will contain customary provisions and will provide, among other things, that the Management Stockholder Entities will deliver to and deposit in custody with the custodian and
attorney-in-fact named therein a certificate or certificates (if such shares are certificated) representing such shares of Common Stock (duly endorsed in blank by the registered owner or owners thereof) and irrevocably appoint said custodian and
attorney-in-fact as the Management Stockholder Entities’ agent and attorney-in-fact with full power and authority to act under the Custody Agreement and Power of Attorney on the Management Stockholder Entities’ behalf with respect to the
matters specified therein. 
 5. Your right pursuant hereto to participate in a Proposed Sale shall be contingent on your
material compliance with each of the provisions hereof and your willingness to execute such documents in connection therewith as may be reasonably requested by the Selling Entity. 

  
 4 

 6. If the consideration to be paid in exchange for shares of Common Stock in a Proposed Sale
pursuant to Paragraph 1 includes any securities, and the receipt thereof by the Selling Entity and a Management Shareholder Entity would require under applicable law (a) the registration or qualification of such securities or of any Person as a
broker or dealer or agent with respect to such securities or (b) the provision to any selling Management Shareholder Entity of any information regarding the Company, its subsidiaries, such securities or the issuer thereof that would not be
required to be delivered in an offering solely to a limited number of “accredited investors” under Regulation D promulgated under the Securities Act of 1933, as amended, and the rules and regulations in effect thereunder, the Selling
Entity and such Management Shareholder Entity shall not, subject to the following sentence, have the right to sell shares of Common Stock in such proposed sale. In such event, the Selling Entity shall have the right to cause to be paid to such
selling Management Shareholder Entity in lieu thereof, against surrender of the shares of Common Stock which would have otherwise been sold by such selling Management Shareholder Entity to the prospective buyer in the proposed sale, an amount in
cash equal to the Fair Market Value (as defined in the Stockholder’s Agreement) of such shares of Common Stock as of the date such securities would have been issued in exchange for such shares of Common Stock. 

7. (a) If any Selling Entity that directly owns shares of Common Stock or LP Units proposes to transfer, directly or indirectly (whether
by means of a merger, consolidation, reorganization or recapitalization, sale, transfer or otherwise), a number of shares of Common Stock or LP Units equal to 50% or more of the outstanding Common Stock or LP Units, as applicable (such Person, the
“Drag-Along Purchaser”), then if requested by such Selling Entity, each Management Stockholder Entity shall be required to sell a number of shares of Common Stock equal to the aggregate number of shares of Common Stock held by the
Management Stockholder Entities (including shares of Common Stock underlying exercisable Options) multiplied by the Tag Along Sale Percentage (such transaction, a “Drag Transaction”). 

(b) Shares of Common Stock held by the Management Stockholder Entities included in a Drag Transaction will be included in any agreements
with the Drag-Along Purchaser relating thereto on the same terms and subject to the same conditions applicable to the shares of Common Stock or LP Units, as applicable, which the Drag-Along Purchaser proposes to sell in the Drag Transaction. Such
terms and conditions shall include, without limitation: the pro rata reduction of the number of shares of Common Stock or LP Units to be sold by the Drag-Along Purchaser and the Management Stockholder Entities to be included in the Drag Transaction
if required by the Drag-Along Purchaser; the sale price; the payment of fees, commissions and expenses; the provision of, and representation and warranty as to, information reasonably requested by the Drag-Along Purchaser covering matters regarding
the Management Stockholder Entities’ ownership of shares of Common Stock; and the provision of requisite indemnification; provided that any indemnification provided by the Management Stockholder Entities shall be pro rata in proportion
with the number of shares of Common Stock or LP Units to be sold; provided, further, that no Management Stockholder Entity shall be required to (x) indemnify any Person for an amount, in the aggregate, in excess of the gross
proceeds received in such Proposed Sale, or (y) agree to any non-compete or non-solicit provisions that are more restrictive than such similar agreement between the Company and the applicable Management Stockholder. 

(c) Your pro rata share of any amount to be paid pursuant to Paragraph 3 or 7(b) shall be based upon the number of shares of Common
Stock intended to be transferred by the Management Stockholder Entities plus the number of shares of Common Stock you would have the right to acquire under any unexercised portion of the Option which is then vested or would become vested as a result
of the Proposed Sale or Drag Transaction, assuming that you receive a payment in respect of such Option. 

  
 5 

 (d) Notwithstanding anything to the contrary in the foregoing, if the consideration payable
to Management Stockholder Entities for shares of Common Stock is securities and the acquisition of such securities by a Management Stockholder Entity would reasonably be expected to be prohibited under U.S., foreign or state securities laws, such
Management Stockholder Entity shall be entitled to receive an amount in cash equal to the value of any such securities such Person would otherwise be entitled to receive. 
 8. The obligations of Parent hereunder shall extend only to you and your transferees (“Permitted Transferees”) who (a) are party to a Stockholder’s Agreement with the Company
and (b) have acquired Common Stock pursuant to clause (ii) of the definition of a Permitted Transfer (as defined in the Stockholder’s Agreement), and none of the Management Stockholder Entities’ successors or assigns, with the
exception of any Permitted Transferee and only with respect to the Common Stock acquired by such Permitted Transferee pursuant to a Permitted Transfer, shall have any rights pursuant hereto. 

9. This Agreement shall terminate and be of no further force and effect on the occurrence of the earlier of the consummation of a
Qualified Public Offering (as defined in the Stockholder’s Agreement) or a Change in Control (as defined in the Stockholder’s Agreement). 
 10. All notices and other communications required or permitted hereunder shall be in writing and shall be deemed effectively given: (a) upon personal delivery to the party to be notified,
(b) when sent by confirmed facsimile if sent during normal business hours of the recipient, if not, then on the next Business Day, (c) five (5) days after having been sent by registered or certified mail, return receipt requested,
postage prepaid or (d) one (1) Business Day after deposit with a nationally recognized overnight courier, specifying next day delivery, with written verification of receipt. All communications shall be sent to such party’s address as
set forth below or at such other address or to such other person as the party shall have furnished to each other party in writing in accordance with this provision: 
 If to Parent, at the following address: 
 Texas Energy Future
Holdings Limited Partnership 
 c/o TPG Capital, L.P. 

301 Commerce Street, Suite 3300 
 Fort Worth, Texas 76102 
 Attention: Clive Bode 

Telecopy: (817) 871-4000 

  
 6 

 with a copy to: 

Simpson Thacher & Bartlett LLP 

425 Lexington Avenue 
 New York, New York 10017 
 Attention: Alvin Brown, Esq. 

                 Andrew W. Smith,
Esq. 
 Telecopy: (212) 455-2502 
 If to you, to you at the address set forth on the signature page hereto; 
 If to
your Management Stockholder’s Estate or Management Stockholder’s Trust, to the address provided to the Company by such entity in writing. 
 11. The laws of the State of Texas shall govern the interpretation, validity and performance of the terms of this Agreement. In the event of any controversy among the parties hereto arising out of, or
relating to, this Agreement which cannot be settled amicably by the parties, such controversy shall be finally, exclusively and conclusively settled by mandatory arbitration conducted expeditiously in accordance with the American Arbitration
Association rules, by a single independent arbitrator. Such arbitration process shall take place in Dallas, Texas. The decision of the arbitrator shall be final and binding upon all parties hereto and shall be rendered pursuant to a written
decision, which contains a detailed recital of the arbitrator’s reasoning. Judgment upon the award rendered may be entered in any court having jurisdiction thereof. Each party shall bear its own legal fees and expenses, unless otherwise
determined by the arbitrator; provided that if the Management Stockholder substantially prevails on any of his or her substantive legal claims, Parent shall reimburse all legal fees and arbitration fees incurred by the Management Stockholder to
arbitrate the dispute. Each party hereto hereby irrevocably waives any right that it may have had to bring an action in any court, domestic or foreign, or before any similar domestic or foreign authority with respect to this Agreement. 

12. This Agreement may be executed in counterparts, and by different parties on separate counterparts, each of which shall be deemed an
original, but all such counterparts shall together constitute one and the same instrument. 
 13. This Agreement may be amended
by Parent at any time upon notice to the Management Stockholder thereof; provided that any amendment (i) that materially disadvantages the Management Stockholder shall not be effective unless and until the Management Stockholder has
consented thereto in writing and (ii) that disadvantages the Management Stockholders in more than a de minimis way but less than a material way shall require the consent of Management Stockholders holding a majority of the equity interests held
by the Management Stockholders. 
 14. Capitalized terms used by not defined herein shall have the meaning ascribed to such
terms in the Stockholder’s Agreement. 
 [Signatures on following pages] 

  
 7 

 If the foregoing accurately sets forth our agreement, please acknowledge your acceptance
thereof in the space provided below for that purpose. 
  

			
	 Very truly yours,
  

TEXAS ENERGY FUTURE HOLDINGS
 LIMITED
PARTNERSHIP

		
	By:	 	 TEXAS ENERGY FUTURE CAPITAL

HOLDINGS LLC,
 its general
partner

		 	
		
	By:	 	 
		 	 Name:

Title:

	
	 Accepted and agreed as of the date first written
 above.

	
	  
	 (NAME)

(ADDRESS)

  

[Signature page to Sale Participation Agreement]Form of Management Stockholder's Agreement

 Exhibit 4.11 
 MANAGEMENT STOCKHOLDER’S AGREEMENT 
 LT/MT Form 

This Management Stockholder’s Agreement (this “Agreement”) is entered into as of {DATE} among Energy Future
Holdings Corp. (formerly known as “TXU Corp.”), a Texas corporation (the “Company”), Texas Energy Future Holdings Limited Partnership, a Delaware limited partnership (“Parent”), and the undersigned person
(the “Management Stockholder”) (the Company, Parent and the Management Stockholder being hereinafter collectively referred to as the “Parties”). All capitalized terms not immediately defined are hereinafter defined
in Section 7(b) of this Agreement. 
 WHEREAS, pursuant to the Agreement and Plan of Merger, dated as of February 25,
2007 (the “Merger Agreement”), by and among Parent, Texas Energy Future Merger Sub Corp, a Texas corporation and a direct wholly owned Subsidiary of Parent (“Merger Sub”) and the Company, on October 10, 2007,
Merger Sub merged with and into the Company (the “Merger”), with the Company surviving the Merger and being renamed “Energy Future Holdings Corp.”; 
 WHEREAS, in connection with the Merger, investment funds affiliated with Kohlberg Kravis Roberts & Co. L.P., TPG Capital, L.P. and Goldman, Sachs & Co. (collectively, the
“Sponsor Group”), as well as other investors, contributed certain funds to Parent in exchange for limited partnership units; 
 WHEREAS, as a result of the Merger and after giving effect to certain issuances of stock in connection therewith, Parent owns, beneficially and of record, in excess of 99% of the issued and outstanding
shares of the Company’s common stock, no par value (the “Common Stock”); 
 WHEREAS, the Management
Stockholder has been selected by the Company (i) in connection with the Merger, to exchange certain shares of common stock of the Company owned immediately prior to the Effective Time for new shares of Common Stock (the “Rollover
Stock”) pursuant to an Exchange Agreement entered into between the Management Stockholder and Parent prior to the Merger (the “Exchange Agreement”); and/or (ii) to be permitted to transfer to the Company cash in
exchange for shares of Common Stock (the “Cash Purchased Stock”); and/or (iii) to be permitted to designate certain funds held pursuant to the EFH Salary Deferral Plan (the “Program”) as deemed to be invested
in Common Stock (any shares of Common Stock subsequently issued to a Management Stockholder Entity (as defined below) pursuant to a distribution under the terms of the Program, “Deferred Purchased Stock” and together with Cash
Purchased Stock, “Purchased Stock”); and/or (iv) has been selected by the Company to receive options to purchase shares of Common Stock (the “Options”) pursuant to the terms set forth below and the terms of the
2007 Stock Incentive Plan for Key Employees of Energy Future Holdings Corp. and its Affiliates (the “Option Plan”) and the Energy Future Holdings Corp. Key Employee Non-Qualified Stock Option Agreement to be entered into by and
between the Company and the Management Stockholder on or about the date hereof (the “Stock Option Agreement”); and 
 WHEREAS, this Agreement is one of several other agreements (“Other Management Stockholders Agreements”) which concurrently with the execution hereof or in the future will be entered into
between the Company and other individuals who are or will be key employees of the Company or one of its Subsidiaries (collectively, the “Other Management Stockholders”). 

 NOW THEREFORE, to implement the foregoing and in consideration of the mutual agreements
contained herein, the Parties agree as follows: 
 1. Issuance of Purchased Stock; New Options; Rollover Stock.

 (a) Subject to the terms and conditions hereinafter set forth, the Management Stockholder hereby subscribes for and shall
purchase, as of the date hereof, and the Company shall issue and deliver to the Management Stockholder as of the date hereof, the number of shares of Cash Purchased Stock at a $[        ] per share purchase
price (the “Base Price”), in each case as set forth on Schedule I hereto. 
 (b) If the Management
Stockholder holds Rollover Stock, immediately prior to the Effective Time, the Management Stockholder has, if applicable, transferred to Parent the shares identified by such Management Stockholder in the Exchange Agreement and immediately after the
Effective Time the Management Stockholder has received a number of shares of Rollover Stock, in each case pursuant to the Exchange Agreement. The Parties agree that they will not treat the Management Stockholder as holding a limited partnership
interest in Parent for U.S. federal income tax purposes. 
 (c) Subject to certain terms and conditions, including those
hereinafter set forth and as set forth in the Option Plan, including the Management Stockholder’s continuing ownership of the Rollover Stock or Purchased Stock, the Company will grant to the Management Stockholder Options, at an initial
exercise price equal to the Base Price, to acquire the number of shares of Common Stock as set forth in such Management Stockholder’s Stock Option Agreement which the Parties shall execute and deliver to each other copies of concurrently with
the issuance of such Options. 
 (d) The Company shall have no obligation to sell any Purchased Stock to any person who
(i) is a resident or citizen of a state or other jurisdiction in which the sale of the Common Stock to him or her would constitute a violation of the securities or “blue sky” laws of such jurisdiction or (ii) is not an employee
or director of the Company or its Subsidiaries as of the Closing Date. 
 2. Management Stockholder’s Representations,
Warranties and Agreements. 
 (a) The Management Stockholder agrees and acknowledges that he will not, directly or
indirectly, offer, transfer, sell, assign, pledge, hypothecate or otherwise dispose of (any of the foregoing acts being referred to herein as a “transfer”) any shares of (x) Purchased Stock, (y) Rollover Stock, and
(z) at the time of exercise, Common Stock issuable upon exercise of Options (“Option Stock”; together with all Purchased Stock, Rollover Stock, and any other Common Stock otherwise acquired and/or held by the Management
Stockholder Entities as of or after the date hereof, “Stock”), except as provided in this Section 2(a) below and Section 3 hereof. If the Management Stockholder is an Affiliate of the Company, the Management Stockholder
also agrees and acknowledges that he or she will not transfer any shares of the Stock unless: 

  
 2 

 (i) the transfer is pursuant to an effective registration statement under
the Securities Act of 1933, as amended, and the rules and regulations in effect thereunder (the “Act”), and in compliance with applicable provisions of state securities laws; or 

(ii) (A) counsel for the Management Stockholder (which counsel shall be reasonably acceptable to the Company) shall have
furnished the Company with an opinion or other advice, reasonably satisfactory in form and substance to the Company, that no such registration is required because of the availability of an exemption from registration under the Act and (B) if
the Management Stockholder is a citizen or resident of any country other than the United States, or the Management Stockholder desires to effect any transfer in any such country, counsel for the Management Stockholder (which counsel shall be
reasonably satisfactory to the Company) shall have furnished the Company with an opinion or other advice reasonably satisfactory in form and substance to the Company to the effect that such transfer will comply with the securities laws of such
jurisdiction. 
 Notwithstanding the foregoing, the Company acknowledges and agrees that any of the following transfers of Stock are deemed to
be in compliance with the Act and this Agreement (including without limitation any restrictions or prohibitions herein), and no opinion of counsel is required in connection therewith: (1) a transfer made pursuant to Sections 3, 4, 5, 6 or 9
hereof, (2) a transfer (x) upon the death or Disability of the Management Stockholder to the Management Stockholder’s Estate or (y) to the executors, administrators, testamentary trustees, legatees, immediate family members or
beneficiaries of a person who has become a holder of Stock in accordance with the terms of this Agreement; provided that it is expressly understood that any such transferee shall be bound by the provisions of this Agreement and if requested
such transferee shall agree in writing to be bound by the terms and conditions hereof as a “Management Stockholder” with respect to the representations and warranties and other obligations of this Agreement, (3) a transfer made after
the Closing Date in compliance with the federal securities laws to a Management Stockholder’s Trust; provided that such transfer is made expressly subject to this Agreement and that the transferee agrees in writing to be bound by the
terms and conditions hereof as a “Management Stockholder” with respect to the representations and warranties and other obligations of this Agreement; and provided further that it is expressly understood and agreed that if such
Management Stockholder’s Trust at any point includes any person or entity other than the Management Stockholder, his spouse (or ex-spouse) or his lineal descendants (including adopted children) such that it fails to meet the definition thereof
as set forth in Section 7(b) hereof, such transfer shall no longer be deemed in compliance with this Agreement and shall be subject to 3(c) below and (4) a transfer made by the Management Stockholder, with the Board’s approval, to the
Company or any Subsidiary of the Company. 
 (b) The certificate (or certificates) representing the Stock, if any, shall bear
the following legend: 
 “THE SHARES REPRESENTED BY THIS CERTIFICATE MAY NOT BE TRANSFERRED, SOLD, ASSIGNED, PLEDGED,
HYPOTHECATED OR OTHERWISE DISPOSED OF UNLESS SUCH TRANSFER, SALE, ASSIGNMENT, PLEDGE, HYPOTHECATION OR OTHER DISPOSITION COMPLIES WITH THE PROVISIONS OF THE MANAGEMENT STOCKHOLDER’S AGREEMENT BETWEEN ENERGY FUTURE HOLDINGS CORP. (THE
“COMPANY”) AND THE MANAGEMENT STOCKHOLDER NAMED ON THE FACE HEREOF OR THE SALE PARTICIPATION AGREEMENT BETWEEN SUCH MANAGEMENT STOCKHOLDER AND TEXAS ENERGY FUTURE HOLDINGS LIMITED PARTNERSHIP, IN EACH CASE DATED AS OF DECEMBER __, 2007
(COPIES OF WHICH ARE ON FILE WITH THE SECRETARY OF THE COMPANY) AND ALL APPLICABLE FEDERAL AND STATE SECURITIES LAWS.” 

  
 3 

 (c) The Management Stockholder acknowledges that he has been advised that (i) the Stock
are characterized as “restricted securities” under the Act inasmuch as they are being acquired from the Company in a transaction not involving a Public Offering and that under the Act (including applicable regulations) the Stock may be
resold without registration under the Act only in certain limited circumstances, (ii) a restrictive legend in the form heretofore set forth shall be placed on the certificates (if any) representing the Stock and (iii) a notation shall be
made in the appropriate records of the Company indicating that the Stock is subject to restrictions on transfer and appropriate stop transfer restrictions will be issued to the Company’s transfer agent with respect to the Stock. 

(d) If any shares of the Stock are to be disposed of in accordance with Rule 144 under the Act or otherwise, the Management
Stockholder shall promptly notify the Company of such intended disposition and shall deliver to the Company at or prior to the time of such disposition such documentation as the Company may reasonably request in connection with such sale and take
any actions reasonably requested by the Coordination Committee prior to any such sale (provided that such instructions shall not have a disproportionate adverse impact on any Management Stockholder vis-à-vis any other stockholders of the
Company or limited partners of Parent) and, in the case of a disposition pursuant to Rule 144, shall deliver to the Company an executed copy of any notice on Form 144 required to be filed with the SEC. 

(e) The Management Stockholder represents and warrants that (i) with respect to the Purchased Stock, Rollover Stock and Option
Stock, the Management Stockholder has received and reviewed the available information relating to such Stock, including having received and reviewed the documents related thereto, certain of which documents set forth the rights, preferences and
restrictions relating to the Options and the Stock underlying the Options and (ii) the Management Stockholder has been given the opportunity to obtain any additional information or documents and to ask questions and receive answers about such
information and documents, the Company and the business and prospects of the Company which the Management Stockholder deems necessary to evaluate the merits and risks related to the Management Stockholder’s investment in the Stock and to verify
the information contained in the information received as indicated in this Section 2(e), and the Management Stockholder has relied solely on such information. 
 (f) The Management Stockholder further represents and warrants that (i) the Management Stockholder’s financial condition is such that the Management Stockholder can afford to bear the economic
risk of holding the Stock for an indefinite period of time and has adequate means for providing for the Management Stockholder’s current needs and personal contingencies, (ii) the Management Stockholder can afford to suffer a complete loss
of his or her investment in the Stock, (iii) the Management Stockholder understands and has taken cognizance of all risk factors related to the purchase of the Stock, (iv) the Management Stockholder’s knowledge and experience in
financial and business matters are such that the Management Stockholder is capable of evaluating the merits and risks of the Management Stockholder’s purchase of the Stock as contemplated by this Agreement, (v) with respect to the
Purchased Stock, such Purchased Stock is being acquired by the Management Stockholder for his or her own account, not as nominee or agent, and not with a view to the resale or distribution of any part thereof in violation of the Act, and the
Management Stockholder has no present intention of selling or otherwise distributing the Purchased Stock in violation of the Act, and (vi) at the time of this offering, the Management Stockholder is an employee, director or officer of the
Company or one of its Subsidiaries. 

  
 4 

 3. Transferability of Stock. 

(a) The Management Stockholder agrees that he or she will not transfer any shares of Stock at any time during the period commencing on
the date hereof and ending on the later of (x) the fifth anniversary of the Closing Date and (y) the consummation of a Qualified Public Offering; provided, however, that during such period, the Management Stockholder may
transfer shares of Stock pursuant to one of the following exceptions: (i) transfers permitted by Sections 5 or 6; (ii) transfers permitted by clauses (2) and (3) of Section 2(a); (iii) a sale of shares of Common
Stock pursuant to Section 9; (iv) transfers permitted pursuant to the Sale Participation Agreement; (v) transfers permitted by the Board or (vi) transfers to Parent or its designee (any such exception, a “Permitted
Transfer”); provided, further, that following the consummation of a Qualified Public Offering and prior to the fifth anniversary of the Closing Date, if the Selling Entities (as defined in the Sale Participation Agreement)
transfer, directly for cash or any other consideration any shares of Common Stock owned by any such Selling Entity (other than pursuant to the Registration Rights Agreement or to an Affiliate or to another limited partner in Parent), the Management
Stockholder shall be entitled to transfer (without giving effect to any restrictions included above in this Section 3(a)) a number of shares of Common Stock, if any, that the Management Stockholder would have been able to transfer in such sale
pursuant to Section 2 of the Sale Participation Agreement had it occurred prior to a Qualified Public Offering. 
 (b) No
transfer of any such shares in violation hereof shall be made or recorded on the books of the Company and any such transfer shall be void ab initio and of no effect. 
 (c) No transfer of any shares of Stock shall be permitted or effected if such transfer would cause the Company to be required to register the Common Stock pursuant to Section 12(g)(1) of the Exchange
Act. 
 (d) Notwithstanding anything to the contrary herein, Parent may, at any time and from time to time, waive the
restrictions on transfers contained in Section 3(a), whether such waiver is made prior to or after the transferee has effected or committed to effect the transfer, or has notified the Sponsor Group of such transfer or commitment to transfer.
Any transfers made pursuant to such waiver or which are later made subject to such a waiver shall, as of the date of the waiver and at all times thereafter, not be deemed to violate any applicable restrictions on transfers contained in this
Agreement. 
 4. [Intentionally omitted] 
 5. The Management Stockholder’s Right to Resell Option Stock and Options to the Company. 

  
 5 

 (a) Except as otherwise provided herein, if the Management Stockholder’s employment
with the Company (or, if applicable, any of its Subsidiaries or Affiliates) terminates as a result of the death or Disability of the Management Stockholder, then the applicable Management Stockholder Entity, shall, during the later of the following:
(x) the 365-day period following the date of such termination for death or Disability or (y) if the Company has declared an Event has occurred, the 30-day period following the date on which the Management Stockholder Entity receives notice
that an Event which was declared by the Company while the Management Stockholder Entity held the Stock no longer exists; provided, however, the Management Stockholder Entity shall not be entitled to exercise the Management
Stockholder’s rights pursuant to this Section 5 unless the Management Stockholder Entity has held the Stock to be resold pursuant to this Section 5 for at least six (6) months (including as a result of net settlement as specified
in Section 5(a)(ii) (the “Put Period”), have the right to: 
 (i) With respect to Option
Stock (including Net Settled Stock, defined below), sell to the Company, and the Company shall be required to purchase, on one occasion, all of the shares of Option Stock then held by the applicable Management Stockholder Entities at a per share
price equal to the Fair Market Value on the Repurchase Calculation Date; 
 (ii) With respect to any outstanding
vested Options, upon the occurrence of the applicable event identified in this Section 5 giving rise to the Management Stockholder’s rights hereunder, the Company shall deem the Management Stockholder Entity to have exercised the
outstanding vested Options, in accordance with the terms of the relevant Stock Option Agreement, and be entitled to receive from the Company, on one occasion, in exchange for all of the outstanding vested Options then held by the applicable
Management Stockholder Entity, if any, a number of shares of Stock equal to the quotient of (x) the product of (A) the excess, if any, of the Fair Market Value over the Option Exercise Price and (B) the number of shares then
acquirable on exercise, divided by (y) the Fair Market Value, which Options shall be terminated in exchange for such payment of shares of Stock (such shares of Stock, the “Net Settled Stock”). In the event the foregoing amount
is zero or a negative number, all outstanding exercisable Options shall be automatically terminated without any payment in respect thereof; and 
 (iii) With respect to any outstanding unvested Options, all outstanding unvested Options shall be terminated and cancelled without any payment in respect thereof. 

(b) In the event the applicable Management Stockholder Entities intend to exercise their rights pursuant to Section 5(a), such
Management Stockholder Entities shall send written notice to the Company, at any time during the Put Period, of their intention to sell shares of Stock (including Net Settled Stock) in exchange for the payment referred to in Section 5(a)(i) and
shall indicate the number of shares of Option Stock (including Net Settled Stock) to be sold (the “Redemption Notice”). The completion of the purchases shall take place at the principal office of the Company no later than the
twentieth Business Day (such date to be determined by the Company) after the giving of the Redemption Notice. The applicable Repurchase Price shall be paid by delivery to the applicable Management Stockholder Entities, at the option of the Company,
of a certified bank check or checks in the appropriate amount payable to the order of each of the applicable Management Stockholder Entities (or by wire transfer of immediately available funds, if the Management Stockholder Entities provide to the
Company wire transfer instructions) against delivery of certificates or other instruments representing the Stock so purchased. 

  
 6 

 (c) Notwithstanding anything in this Section 5 to the contrary, if there exists and is
continuing a default or an event of default on the part of the Company or any Subsidiary of the Company under any loan, guarantee or other agreement under which the Company or any Subsidiary of the Company has borrowed money or if the repurchase
referred to in Section 5(a) (or Section 6 below, as the case may be) would result in a default or an event of default on the part of the Company or any Affiliate of the Company under any such agreement or if a repurchase would reasonably
be expected to be prohibited by the Texas Business Organization Code (“TBOC”) or any federal or state securities laws or regulations (or if the Company reincorporates in another state, the business corporation law of such state)
(each such occurrence being an “Event”), the Company shall not be obligated to repurchase any of the Stock or the Options from the applicable Management Stockholder Entities to the extent it would cause any such default or would be
so prohibited by the Event for cash but instead, with respect to such portion with respect to which cash settlement is prohibited, may satisfy its obligations with respect to the Management Stockholder Entities’ exercise of their rights under
Section 5(a) by delivering to the applicable Management Stockholder Entity a note with a principal amount equal to the amount payable under this Section 5 that was not paid in cash, having terms acceptable to the Company’s (and its
Affiliate’s, as applicable) lenders and permitted under the Company’s (and its Affiliate’s, as applicable) debt instruments but which in any event (i) shall be mandatorily repayable promptly and to the extent that an Event no
longer prohibits the payment of cash to the applicable Management Stockholder Entity pursuant to this Agreement; and (ii) shall bear interest at a rate equal to the effective rate of interest in respect of the Company’s U.S.
dollar-denominated subordinated public debt securities (including any original issue discount). 
 (d) Notwithstanding anything
in this Agreement to the contrary, this Section 5 shall terminate and be of no further force or effect upon the earlier of (i) a Change in Control, or (ii) the later of (x) the fifth anniversary of the Closing Date or
(y) the consummation of a Qualified Public Offering, except for any payment obligation of the Company or transfer obligation of the Management Stockholder Entities which has arisen prior to such termination date. 

(e) Notwithstanding the foregoing and subject to Section 5(d), if an Event exists and is continuing for ninety (90) days after
the date of the Redemption Notice, the Management Stockholder Entities shall be permitted by written notice to rescind any Redemption Notice with respect to that portion of the Option Stock (including Net Settled Stock) repurchased by the Company
from the Management Stockholder Entities pursuant to this Section 5 with the note described above, to the extent such note remains unpaid, and such repurchase shall be rescinded; provided that, upon such rescission, such note shall be
immediately canceled without any action on the part of the Company or the Management Stockholder Entities, and notwithstanding anything herein or in such note to the contrary, the Company shall have no obligation to pay any amounts of principal or
interest thereunder. 
 6. The Company’s Option to Purchase Stock of the Management Stockholder Upon Certain
Terminations of Employment. 
 (a) Termination by the Management Stockholder without Good Reason. If, prior to the
fifth anniversary of the Closing Date (and following the fifth anniversary of the Closing Date with respect to Option Stock (including Net Settled Stock as specified below)) the Management Stockholder’s active employment with the Company (or,
if applicable, its Subsidiaries or Affiliates) is terminated by the Management Stockholder without Good Reason, other than on account of Retirement (such event, a “Section 6(a) Call Event”), then: 

  
 7 

 (i) With respect to any Purchased Stock or Rollover Stock, the Company may
purchase, on one occasion, all or any portion of the shares of such Stock or Rollover Stock then held by the applicable Management Stockholder Entities at a per share purchase price equal to the Fair Market Value of the Stock, but only if such
termination occurs prior to the fifth anniversary of the Closing Date; 
 (ii) With respect to any Option Stock
or Net Settled Stock, the Company may purchase, on one occasion, all or any portion of the shares of such Option Stock or Net Settled Stock then held by the applicable Management Stockholder Entities at a per share purchase price equal to
(x) if such termination occurs prior to the fifth anniversary of the Closing Date, the Fair Market Value of the Option Stock or Net Settled Stock less 20% of the amount, if any, by which such Fair Market Value exceeds exercise price paid for
such Option Stock or Net Settled Stock (which exercise price shall be zero with respect to the Net Settled Stock), or (y) if such termination occurs on or after the fifth anniversary of the Closing Date, the Fair Market Value of the Option
Stock or Net Settled Stock; and 
 (iii) With respect to any outstanding vested Options, upon the occurrence of
a Section 6(a) Call Event, the Company shall deem the Management Stockholder Entity to have exercised the outstanding vested Options, in accordance with the terms of the relevant Stock Option Agreement, and be entitled to receive from the
Company, on one occasion, Net Settled Stock in exchange for all of the outstanding vested Options then held by the applicable Management Stockholder Entity. 
 (iv) With respect to any outstanding unvested Options, all outstanding unvested Options shall be automatically terminated without any payment in respect thereof upon the occurrence of the
Section 6(a) Call Event. 
 For the avoidance of any doubt, the termination of the Management Stockholder’s active employment with the
Company (or, if applicable, its Subsidiaries or Affiliates) by the Management Stockholder without Good Reason following the fifth anniversary of the Closing Date shall not constitute a Section 6(a) Call Event with respect to the Purchased Stock
or Rollover Stock. 
 (b) Termination by the Company without Cause, Termination by the Management Stockholder for Good
Reason, Death, Disability or Retirement. If the Management Stockholder’s active employment with the Company (or, if applicable, its Subsidiaries or Affiliates) is terminated by the Company without Cause, by the Management Stockholder for
Good Reason, or on account of the Management Stockholder’s death, Disability or Retirement (such event, a “Section 6(b) Call Event”), then: 

(i) With respect to any Purchased Stock or Rollover Stock, the Company shall have no repurchase right; 

(ii) With respect to any Option Stock (including Net Settled Stock), the Company may purchase, on one occasion, all or
any portion of the shares of such Option Stock then held by the applicable Management Stockholder Entities at a per share purchase price equal the Fair Market Value of the Option Stock; and 

  
 8 

 (iii) With respect to any outstanding vested Options, upon the occurrence of
a Section 6(b) Call Event, the Company shall deem the Management Stockholder Entity to have exercised the outstanding vested Options, in accordance with the terms of the relevant Stock Option Agreement, and be entitled to receive from the
Company, on one occasion, Net Settled Stock in exchange for all of the outstanding vested Options then held by the applicable Management Stockholder Entity. 
 (iv) With respect to any outstanding unvested Options, all outstanding unvested Options shall be automatically terminated without any payment in respect thereof upon the occurrence of the
Section 6(b) Call Event. 
 (c) Termination for Cause by the Company and other Call Events. If at any time
(i) the Management Stockholder’s active employment with the Company (or, if applicable, its Subsidiaries or Affiliates) is terminated by the Company (or, if applicable, its Subsidiaries or Affiliates) for Cause or (ii) within 12
months following any termination of the Management Stockholder’s employment with the Company (and/or, if applicable, its Subsidiaries or Affiliates), the Management Stockholder engages in a Competing Business (each event described above, a
“Section 6(c) Call Event”), then: 
 (i) With respect to Stock (and in the case of a
Section 6(c)(ii) Call Event, with respect to Option Stock only (including Net Settled Stock)), the Company may purchase, on one occasion, all or any portion of the shares of Stock then held by the applicable Management Stockholder Entities at a
per share purchase price equal to the lesser of (x) Base Price (or other applicable price paid by such Management Stockholder Entities for such Stock) and (y) the Fair Market Value of the Stock; and 

(ii) With respect to any outstanding Options (whether or not vested or unvested), all outstanding Options shall
automatically be terminated without any payment in respect thereof. 
 (iii) Notwithstanding the foregoing, to
the extent the Management Stockholder engages in a Section 6(c)(ii) Call Event after the Management Stockholder has exercised his or her outstanding Options and/or sold the underlying Option Stock, Section 22(c) shall apply. 

(d) Call Notice. The Company shall have a period (the “Call Period”) of one hundred eighty (180) days
following the later to occur of (A) the date of any Call Event and (B) the date on which the Management Stockholder Entity has held the Stock (including Net Settled Stock) most recently acquired to be sold pursuant to this Section 6
for at least six (6) months, in which to give notice in writing to the Management Stockholder of its election to exercise its rights and obligations pursuant to this Section 6 (“Repurchase Notice”). The completion of the
purchases pursuant to the foregoing shall take place at the principal office of the Company no later than the fifteenth Business Day after the giving of the Repurchase Notice. The applicable Repurchase Price shall be paid by delivery to the
applicable Management Stockholder Entities of a certified bank check or checks in the appropriate amount payable to the order of each of the applicable Management Stockholder Entities (or by wire transfer of immediately available funds, if the
Management Stockholder Entities provide to the Company wire transfer instructions) against delivery of certificates or other instruments representing the Stock so purchased. For purposes of this Section 6, any determination of Fair Market Value
shall be made as of the Repurchase Calculation Date. 

  
 9 

 (e) Use of Note to Satisfy Call Payment. Notwithstanding any other provision of this
Section 6 to the contrary, if there exists and is continuing any Event, the Company will, to the extent it has exercised its rights to purchase Stock pursuant to this Section 6, in order to complete the purchase of any Stock pursuant to
this Section 6, deliver to the applicable Management Stockholder Entities (i) a cash payment for any amounts payable pursuant to this Section 6 that would not cause an Event and (ii) a note having the same terms as that provided
in Section 5(c) above with a principal amount equal to the amount payable but not paid in cash pursuant to this Section 6 due to the Event. Notwithstanding the foregoing, if an Event exists and is continuing for ninety (90) days from
the date of the Section 6(b) Call Event, the Management Stockholder Entities shall be permitted by written notice to cause the Company to rescind any Repurchase Notice with respect to that portion of the Stock repurchased by the Company from
the Management Stockholder Entities pursuant to this Section 6 with the note described in the foregoing sentence, to the extent such note remains unpaid; provided that, upon such rescission, such repurchase shall be immediately rescinded
and such note shall be immediately canceled without any action on the part of the Company or the Management Stockholder Entities and, notwithstanding anything herein or in such note to the contrary, the Company shall have no obligation to pay any
amounts of principal or interest thereunder. 
 (f) Termination. Notwithstanding anything in this Agreement to the
contrary, this Section 6 shall terminate and be of no further force or effect upon the earlier of (i) a Change in Control, or (ii) the later of (x) the fifth anniversary of the Closing Date or (y) the consummation of a
Qualified Public Offering, except for any payment obligation of the Company or transfer obligation of the Management Stockholder Entities which has arisen prior to such termination date. 

7. Adjustment of Repurchase Price; Definitions. 
 (a) Adjustment of Repurchase Price. In determining the applicable repurchase price of the Stock and Options, as provided for in Sections 5 and 6, above, appropriate adjustments shall be made
for any stock dividends, splits, combinations, recapitalizations or any other adjustment in the number of outstanding shares of Stock in order to maintain, as nearly as practicable, the intended operation of the provisions of Sections 5 and 6. With
respect to any repurchase of Options provided for in Section 5 or 6 above, if the aggregate amount payable by the Company in respect of the Option Stock that, at a Repurchase Calculation Date, could be purchased by a Management Stockholder upon
exercise of such Options, is less than the applicable Option Exercise Price, all such outstanding exercisable Options will be automatically terminated and cancelled without any payment in respect thereof. 

(b) Definitions. All capitalized terms used in this Agreement and not defined herein shall have the meaning ascribed to such terms
in the Option Plan. Terms used herein and as listed below shall be defined as follows: 
 “Act” shall have the
meaning set forth in Section 2(a)(i) hereof. 
 “Affiliate” means with respect to any Person, any entity
directly or indirectly controlling, controlled by or under common control with such Person; provided, however, for purposes of this Agreement, Texas Energy Future Co-Invest, LP shall not be deemed to be an Affiliate of the Sponsor Group or any
member of the Sponsor Group. 

  
 10 

 “Agreement” shall have the meaning set forth in the introductory paragraph.

 “Base Price” shall have the meaning set forth in Section 1(a) hereof. 

“Board” shall mean the board of directors of the Company, or any duly authorized committee thereof. 

“Business Day” means any day that is not a Saturday, a Sunday or other day on which banks are required or authorized by
law to be closed in the state of New York. 
 “Business Unit” means a discreet business or activity performed
by the Company or its Subsidiaries that is treated, or accounted for, as a separate operating unit in which a Management Stockholder is employed; and furthermore, the sale of a Business Unit may only trigger a Change in Control with respect to the
Management Stockholders employed by that Business Unit. 
 “Call Events” shall mean, collectively,
Section 6(a) Call Events, Section 6(b) Call Events and Section 6(c) Call Events. 
 “Call
Period” shall have the meaning set forth in Section 6(d) hereof. 
 “Cash Purchased Stock” shall
have the meaning set forth in the fourth recital. 
 “Cause” shall mean, with respect to a Management
Stockholder : (i) if, in carrying out his or her duties to the Company, Management Stockholder engages in conduct that constitutes (a) a breach of his or her fiduciary duty to the Company or its shareholders (including, without limitation
a breach or attempted breach of the restrictive covenants under the Management Stockholder’s Agreement), (b) gross neglect or (c) gross misconduct resulting in material economic harm to the Company, or (ii) upon the indictment of
the Management Stockholder , or the plea of guilty or nolo contendere by Management Stockholder to, a felony or a misdemeanor involving moral turpitude. 
 “Change in Control” shall mean, in one or a series of related transactions, (i) the sale of all or substantially all of the consolidated assets or capital stock of the Company or
Business Unit to a person (or group of persons acting in concert) who is not an Affiliate of any member of the Sponsor Group; (ii) a merger, recapitalization or other sale by the Company, any member of the Sponsor Group or their Affiliates, to
a person (or group of persons acting in concert) of Common Stock that results in more than 50% of the Common Stock of the Company (or any resulting company after a merger) being held by a person (or group of persons acting in concert) that does not
include any member of the Sponsor Group or any of their respective Affiliates; or (iii) a merger, recapitalization or other sale of Common Stock by the Company, any member of the Sponsor Group or their Affiliates, after which the Sponsor
Group owns less than 20% of the Common Stock of, and has the ability to appoint less than a majority of the directors to the Board of, the Company (or any resulting company after a merger); and with respect to any of the events described in clauses
(i) and (ii) above, such event results in any person (or group of persons acting in concert) gaining control of more seats on the Board than the Sponsor Group. 
 “Closing Date” shall mean the date of closing of the Merger pursuant to the Merger Agreement. 

  
 11 

 “Common Stock” shall have the meaning set forth in the third recital.

 “Company” shall have the meaning set forth in the introductory paragraph. 

“Competing Business” shall mean any business that directly or indirectly competes, at the relevant determination date,
with one or more of the businesses of the Company, or its Subsidiaries in any geographic area where the Company or its Subsidiaries operates. 
 “Confidential Information” shall mean all non-public information concerning trade secret, know-how, software, developments, inventions, processes, technology, designs, the financial data,
strategic business plans or any proprietary or confidential information, documents or materials in any form or media, including any of the foregoing relating to research, operations, finances, current and proposed products and services, customers,
advertising and marketing, and other non-public, proprietary, and confidential information of the Restricted Group, excluding any such non-public information that (i) is required by court or administrative order to be disclosed or
(ii) becomes generally available to the public other than as a result of a disclosure or failure to safeguard in violation of Section 22. 
 “Coordination Committee” shall be the coordination committee, if any, established by the general partner of the Partnership to facilitate coordination of certain transfers and
dispositions of Common Stock. 
 “Deferred Purchased Stock” shall have the meaning set forth in the fourth
recital. 
 “Disability” shall mean “Disability” as such term is defined in the then current
long-term disability plan of the Company. 
 “Drag Transaction” shall have the meaning ascribed to such term in
the Sale Participation Agreement. 
 “Effective Time” shall have the meaning set forth in the Merger Agreement.

 “Event” shall have the meaning set forth in Section 5(c) hereof. 

“Exchange Act” shall mean the Securities Exchange Act of 1934, as amended (or any successor section thereto).

 “Exchange Agreement” shall have the meaning set forth in the fourth recital. 

“Exercisable Option Shares” shall mean the number of shares of Common Stock that, at the time that Redemption Notice or
Repurchase Notice is delivered (as applicable), could be purchased by the Management Stockholder upon exercise of his or her outstanding and exercisable Options. 
 “Fair Market Value” means (i) if there is a public market for the shares on such date, the average of the high and low closing bid prices of the shares of Common Stock on such stock
exchange on which the shares are principally trading on the date in question, or, if there were no sales on such date, on the closest preceding date on which there were sales of shares or, (ii) if there is no public market for the shares, on a
per share basis, the fair market value of the Common Stock on any given date, as determined reasonably and in good faith by the Board, which shall not take into account any minority interest discount and shall not take into account a discount for
illiquidity of shares of Common Stock held by a Management Stockholder in excess of any illiquidity discount applicable to shares of Common Stock generally. 

  
 12 

 “Good Reason” shall mean (i) a reduction in the Management
Stockholder’s base salary or the Management Stockholder’s annual incentive compensation opportunity (other than a general reduction in base salary or annual incentive compensation opportunities that affects all salaried employees of the
Company equally); (ii) a transfer of the Management Stockholder’s primary workplace by more than thirty-five (35) miles from the current workplace; (iii) a substantial and sustained adverse change in the Management
Stockholder’s duties and responsibilities; or (iv) a material breach by the Company of this Agreement; provided, however, that any isolated, insubstantial and inadvertent failure by the Company that is not in bad faith and is
cured within ten (10) Business Days after the Management Stockholder gives the Company written notice of any such event set forth above, shall not constitute Good Reason. 
 “Management Stockholder” shall have the meaning set forth in the introductory paragraph. 
 “Management Stockholder Entities” shall mean the Management Stockholder’s Trust, the Management Stockholder and the Management Stockholder’s Estate, collectively. 

“Management Stockholder’s Estate” shall mean the conservators, guardians, executors, administrators, testamentary
trustees, legatees or beneficiaries of the Management Stockholder. 
 “Management Stockholder’s Trust”
shall mean a partnership, limited liability company, corporation, trust, private foundation or custodianship, the beneficiaries of which may include only the Management Stockholder, his or her spouse (or ex-spouse) or his or her lineal descendants
(including adopted) or, if at any time after any such transfer there shall be no then living spouse or lineal descendants, the ultimate beneficiaries of any such trust or to the estate of a deceased beneficiary. 

“Merger” shall have the meaning set forth in the first recital. 

“Merger Agreement” shall have the meaning set forth in the first recital. 

“Merger Sub” shall have the meaning set forth in the first recital. 

“Net Settled Stock” shall have the meaning set forth in Section 5(a)(ii) hereof. 

“Non-Compete Period” shall have the meaning set forth in Section 22(a)(ii) hereof. 

“Options” shall have the meaning set forth in the fourth recital. 

“Option Exercise Price” shall mean the then-current exercise price of the shares of Common Stock covered by the
applicable Option. 
 “Option Plan” shall have the meaning set forth in the fourth recital. 

“Option Stock” shall have the meaning set forth in Section 2(a) hereof. 

“Other Management Stockholders” shall have the meaning set forth in the fifth recital. 

  
 13 

 “Other Management Stockholders Agreements” shall have the meaning set forth
in the fifth recital. 
 “Parent” shall have the meaning set forth in the introductory paragraph. 

“Parties” shall have the meaning set forth in the introductory paragraph. 

“Permitted Transfer” shall have the meaning set forth in Section 3(a). 

“Person” shall mean “person,” as such term is used for purposes of Section 13(d) or 14(d) of the Exchange
Act. 
 “Program” shall have the meaning set forth in the fourth recital. 

“Public Offering” shall mean the sale of shares of Common Stock to the public subsequent to the date hereof pursuant to
a registration statement under the Act which has been declared effective by the SEC (other than a registration statement on Form S-4, S-8 or any other similar form). 
 “Purchased Stock” shall have the meaning set forth in the fourth recital. 
 “Put Period” shall have the meaning set forth in Section 5(a) hereof. 
 “Qualified Public Offering” shall mean any firm underwritten public offering of shares of Common Stock (or series of related offerings) pursuant to an effective registration statement
under the Act (other than a registration statement on Form S-4 or S-8 or any other similar form) pursuant to which at least 25% of the outstanding shares of Common Stock are or have been sold to the public. 

“Redemption Notice” shall have the meaning set forth in Section 5(b) hereof. 

“Registrable Securities” shall have the meaning ascribed to such term in the Registration Rights Agreement. 

“Registration Rights Agreement” shall have the meaning set forth in Section 9 hereof. 

“Repurchase Calculation Date” shall mean (i) prior to the occurrence of a Public Offering, the last day of the
month preceding the month in which date of repurchase occurs, and (ii) on and after the occurrence of a Public Offering, last date of trading of the Common Stock immediately preceding the date of repurchase on which there was a closing trading
price for the Common Stock. 
 “Repurchase Notice” shall have the meaning set forth in Section 6(c)
hereof. 
 “Repurchase Price” shall mean the amount to be paid in respect of the Stock and Options to be
purchased by the Company pursuant to Section 5 and Section 6, as applicable. 
 “Restricted Group”
shall mean, collectively, the Company, its Subsidiaries, the members of the Sponsor Group and their respective Affiliates. 

“Rollover Stock” shall have the meaning set forth in the fourth recital. 

  
 14 

 “Sale Participation Agreement” shall mean that certain sale participation
agreement entered into by and between the Management Stockholder and Parent dated as of the date hereof. 
 “Selling
Entities” shall have the meaning ascribed to such term in the Sale Participation Agreement. 
 “SEC”
shall mean the Securities and Exchange Commission. 
 “Sponsor Group” shall have the meaning set forth in the
second recital. 
 “Stock” shall have the meaning set forth in Section 2(a) hereof. 

“Stock Option Agreements” shall have the meaning set forth in the fourth recital. 

“TBOC” shall have the meaning set forth in Section 2(c) hereof. 

“transfer” shall have the meaning set forth in Section 2(a) hereof. 

8. The Company’s Representations and Warranties and Covenants. 

(a) The Company represents and warrants to the Management Stockholder that (i) this Agreement has been duly authorized, executed and
delivered by the Company and is enforceable against the Company in accordance with its terms and (ii) the Stock, when issued and delivered in accordance with the terms hereof and the other agreements contemplated hereby, will be duly and
validly issued, fully paid and nonassessable. 
 (b) If the Company becomes subject to the reporting requirements of
Section 12 of the Exchange Act, the Company will file the reports required to be filed by it under the Act and the Exchange Act and the rules and regulations adopted by the SEC thereunder, to the extent required from time to time to enable the
Management Stockholder to sell shares of Stock, subject to compliance with the provisions hereof (including requirements of the Coordination Committee of Parent or the Company) without registration under the Exchange Act within the limitations of
the exemptions provided by (A) Rule 144 under the Act, as such Rule may be amended from time to time, or (B) any similar rule or regulation hereafter adopted by the SEC. Notwithstanding anything contained in this Section 8(b),
the Company may de-register under Section 12 of the Exchange Act if it is then permitted to do so pursuant to the Exchange Act and the rules and regulations thereunder and, in such circumstances, shall not be required hereby to file any reports
which may be necessary in order for Rule 144 or any similar rule or regulation under the Act to be available. Nothing in this Section 8(b) shall be deemed to limit in any manner the restrictions on transfers of Stock contained in this
Agreement. 
 (c) The Company will not agree to any amendment of the terms of the credit agreement
entered into on the Closing Date, or to any corresponding provision in any successor or equivalent debt agreement, that imposes any limits on the Company’s permission thereunder to repurchase stock, or
make payments on any note, in each case under Section 5(c) or 6(e) of this Agreement, that are materially more restrictive than such provision under such credit agreement as in effect on the Closing Date if, at or prior to the
time of such agreement, restrictions corresponding and proportionate thereto have not also been imposed thereunder on the payment of cash dividends on the Common Stock. 

  
 15 

 (d) Other than shares of Common Stock there are no other shares of capital stock of the
Company outstanding. 
 9. Registered Sales. In the event of a sale of Common Stock by Parent or any member of the
Sponsor Group in accordance with the terms of the Registration Rights Agreement entered into by and among the Company and Sponsor Group members party thereto (the “Registration Rights Agreement”), the Company shall release, subject
to applicable law, from the transfer restrictions contained in Section 3(a) hereof a number of shares of Stock held by the Management Stockholder equal to the number of shares of Stock then held by the Management Stockholder Entities, including
all shares of Stock which the Management Stockholder Entities are then entitled to acquire under an unexercised Option to the extent then exercisable, multiplied by a fraction, the numerator of which is the aggregate number of shares of Stock being
sold by holders of Registrable Securities (as defined in the Registration Rights Agreement) (other than Management Stockholders) and the denominator of which is the aggregate number of shares of Stock owned by the holders of Registrable Securities
(other than Management Stockholders). 
 10. Rights to Negotiate Repurchase Price. Nothing in this Agreement shall be
deemed to restrict or prohibit the Company from purchasing, redeeming or otherwise acquiring for value shares of Stock or Options from the Management Stockholder, at any time, upon such terms and conditions, and for such price, as may be mutually
agreed upon in writing between the Parties, whether or not at the time of such purchase, redemption or acquisition circumstances exist which specifically grant the Company the right to purchase, or the Management Stockholder the right to sell,
shares of Stock or any Options under the terms of this Agreement; provided that no such purchase, redemption or acquisition shall be consummated, and no agreement with respect to any such purchase, redemption or acquisition shall be entered
into, without the prior approval of the Board. 
 11. Notice of Change of Beneficiary. Immediately prior to any transfer
of Stock to a Management Stockholder’s Trust, the Management Stockholder shall provide the Company with a copy of the instruments creating the Management Stockholder’s Trust and with the identity of the beneficiaries of the Management
Stockholder’s Trust. The Management Stockholder shall notify the Company as soon as practicable prior to any change in the identity of any beneficiary of the Management Stockholder’s Trust. 

12. Recapitalizations, etc. The provisions of this Agreement shall apply, to the full extent set forth herein with respect to the
Stock or the Options, to any and all shares of capital stock of the Company or any capital stock, partnership units or any other security evidencing ownership interests in any successor or assign of the Company (whether by merger, consolidation,
sale of assets or otherwise) which may be issued in respect of, in exchange for, or substitution of the Stock or the Options by reason of any stock dividend, split, reverse split, combination, recapitalization, liquidation, reclassification, merger,
consolidation or otherwise. 
 13. Management Stockholder’s Employment by the Company. Nothing contained in this
Agreement (a) obligates the Company or any Subsidiary of the Company to employ the Management Stockholder in any capacity whatsoever or (b) prohibits or restricts the Company (or any such Subsidiary) from terminating the employment of the
Management Stockholder at any time or for any reason whatsoever, with or without Cause, and the Management Stockholder hereby acknowledges and agrees that neither the Company nor any other person has made any representations or promises whatsoever
to the Management Stockholder concerning the Management Stockholder’s employment or continued employment by the Company or any Subsidiary of the Company. 

  
 16 

 14. Binding Effect. The provisions of this Agreement shall be binding upon and accrue
to the benefit of the parties hereto and their respective heirs, legal representatives, successors and assigns. In the case of a transferee permitted under clauses (2), (3) or (4) of Section 2(a) or clauses (ii) and (v) of
Section 3(a) hereof, such transferee shall be deemed the Management Stockholder hereunder; provided, however, that no transferee (including without limitation, transferees referred to in Section 2(a) or Section 3(a)
hereof) shall derive any rights under this Agreement unless and until such transferee has delivered to the Company a valid undertaking and becomes bound by the terms of this Agreement. No provision of this Agreement is intended to or shall confer
upon any Person other than the Parties any rights or remedies hereunder or with respect hereto. 
 15. Amendment. This
Agreement may be amended by the Company at any time; provided that any amendment (i) that materially disadvantages the Management Stockholder shall not be effective unless and until the Management Stockholder has consented thereto in
writing and (ii) that disadvantages the Management Stockholders in more than a de minimis way but less than a material way shall require the consent of Management Stockholders holding a majority of the equity interests held by the Management
Stockholders. 
 16. Closing. Except as otherwise provided herein, the closing of each purchase and sale of shares of
Stock pursuant to this Agreement shall take place at the principal office of the Company on the tenth Business Day following delivery of the notice by either Party to the other of its exercise of the right to purchase or sell such Stock hereunder.

 17. Applicable Law; Jurisdiction; Arbitration; Legal Fees. 

(a) The laws of the State of Texas applicable to contracts executed and to be performed entirely in such state shall govern the
interpretation, validity and performance of the terms of this Agreement. 
 (b) In the event of any controversy among the
parties hereto arising out of, or relating to, this Agreement which cannot be settled amicably by the parties, such controversy shall be finally, exclusively and conclusively settled by mandatory arbitration conducted expeditiously in accordance
with the American Arbitration Association rules by a single independent arbitrator. Such arbitration process shall take place in Dallas, Texas. The decision of the arbitrator shall be final and binding upon all parties hereto and shall be rendered
pursuant to a written decision, which contains a detailed recital of the arbitrator’s reasoning. Judgment upon the award rendered may be entered in any court having jurisdiction thereof. 

(c) Notwithstanding the foregoing, the Management Stockholder acknowledges and agrees that the Company, its Subsidiaries, the Sponsor
Group and any of their respective Affiliates shall be entitled to injunctive or other relief in order to enforce the covenant not to compete, covenant not to solicit and/or confidentiality covenants as set forth in Section 22(a) of this
Agreement. 

  
 17 

 (d) In the event of any arbitration or other disputes with regard to this Agreement or any
other document or agreement referred to herein, each Party shall pay its own legal fees and expenses, unless otherwise determined by the arbitrator. 
 18. Assignability of Certain Rights by the Company. The Company shall have the right to assign any or all of its rights or obligations to purchase shares of Stock pursuant to Sections 4, 5 and
6 hereof; provided, however, that no such assignment shall relieve the Company from its obligations thereunder. 

19. Miscellaneous. 
 (a) In this Agreement all references to “dollars” or “$” are to United States dollars and the masculine pronoun shall include the feminine and neuter, and the singular the plural,
where the context so indicates. 
 (b) If any provision of this Agreement shall be declared illegal, void or unenforceable by
any court of competent jurisdiction, the other provisions shall not be affected, but shall remain in full force and effect. 

20. Withholding. The Company or its Subsidiaries shall have the right to deduct from any cash payment made under this Agreement to
the applicable Management Stockholder Entities any federal, state or local income or other taxes required by law to be withheld with respect to such payment, if applicable. 
 21. Notices. All notices and other communications provided for herein shall be in writing. Any notice or other communication hereunder shall be deemed duly given (i) upon electronic
confirmation of facsimile, (ii) one Business Day following the date sent when sent by overnight delivery and (iii) five (5) Business Days following the date mailed when mailed by registered or certified mail return receipt requested
and postage prepaid, in each case as follows: 
  

	 	(a)	If to the Company, to it at the following address: 

 Energy Future Holdings Corp. 
 Energy Plaza 

1601 Bryan Street 
 Dallas, Texas 75201 
 Attention: General Counsel 

Telecopy: (214) 812-4600 
 with copies to: 
 Simpson Thacher & Bartlett LLP

 425 Lexington Avenue 
 New York, New York 10017 
 Attention: Alvin H. Brown, Esq.

                  Andrew
W. Smith, Esq. 
 Telecopy: (212) 455-2502 

  
 18 

 (b) If to the Management Stockholder, to the Management Stockholder at the address set forth
below under the Management Stockholder’s signature; or at such other address as either party shall have specified by notice in writing to the other. 
 22. Confidential Information; Covenant Not to Compete; Covenant Not to Solicit. 
 (a) In consideration of the Company entering into this Agreement with the Management Stockholder and hereby promising and committing itself to provide the Management Stockholder with Confidential
Information and/or specialized training after Management Stockholder executes this Agreement, unless there exists any covenant that pertains to the same subject matter as set forth in this Section 22 in any employment agreement or change in
control agreement in effect at the time of termination of employment between the Management Stockholder and the Company or any of its Subsidiaries or Affiliates, in which case such covenants shall supersede the covenants contained in this
Section 22; then the Management Stockholder shall be subject to the covenants contained in this Section 22. Subject to the preceding sentence, the Management Stockholder shall not, directly or indirectly: 

(i) at any time during or after the Management Stockholder’s employment with the Company or its Subsidiaries,
disclose any Confidential Information pertaining to the business of the Company or any of its Subsidiaries or the Sponsor Group or any of their respective Affiliates, except when required to perform his or her duties to the Company or one of its
Subsidiaries, by law or judicial process; 
 (ii) at any time during the Management Stockholder’s
employment with the Company or its Subsidiaries and for a period of twelve months thereafter (the “Non-Compete Period”), directly or indirectly, act as a proprietor, investor, director, officer, employee, substantial stockholder,
consultant, or partner in any Competing Business in Texas or any other geographic area in which the Company operates or conducts business; or 
 (iii) at any time during the Management Stockholder’s employment with the Company or its Subsidiaries and for a period of twelve months thereafter, directly or indirectly (A) solicit
customers or clients of the Company or any of its Subsidiaries to terminate their relationship with the Company or any of its Subsidiaries or otherwise solicit such customers or clients to compete with any business of the Company or any of its
Subsidiaries, or (B) solicit or offer employment to any person who is, or has been at any time during the twelve (12) months immediately preceding the termination of the Management Stockholder’s employment employed by the Company or
any of its Subsidiaries; 

  
 19 

 provided that in each of (ii) and (iii) above, such restrictions shall not apply with
respect to any member of the Sponsor Group or any of its Affiliates that is not engaged in any business that competes, directly or indirectly, with the Company or any of its Subsidiaries. If the Management Stockholder is bound by any other agreement
with the Company regarding the use or disclosure of Confidential Information, the provisions of this Agreement shall be read in such a way as to further restrict and not to permit any more extensive use or disclosure of Confidential Information.
Notwithstanding the foregoing, for the purposes of Section 22(a)(ii), (A) the Management Stockholder may, directly or indirectly own, solely as an investment, securities of any Person engaged in the business of the Company or its
Affiliates which are publicly traded on a national or regional stock exchange or quotation system or on the over-the-counter market if the Management Stockholder (I) is not a controlling person of, or a member of a group which controls, such
person and (II) does not, directly or indirectly, own 5% or more of any class of securities of such Person (B) the Non-Compete Period shall not be triggered by any exercise of tag-along rights under the Sale Participation Agreement or Drag
Transaction that may occur after the date hereof. 
 (b) Notwithstanding clause (a) above, if at any time a court holds
that the restrictions stated in such clause (a) are unreasonable or otherwise unenforceable under circumstances then existing, the parties hereto agree that the maximum period, scope or geographic area determined to be reasonable under such
circumstances by such court will be substituted for the stated period, scope or area. Because the Management Stockholder’s services are unique and because the Management Stockholder has had access to Confidential Information, the parties hereto
agree that money damages will be an inadequate remedy for any breach of this Agreement (except with respect to any violation of provisions of Section 22(a)(ii)). In the event of a breach or threatened breach of this Agreement, the Company or
its successors or assigns may, in addition to other rights and remedies existing in their favor, apply to any court of competent jurisdiction for specific performance and/or injunctive relief in order to enforce, or prevent any violations of, the
provisions hereof (without the posting of a bond or other security). 
 (c) In the event that the Management Stockholder engages
in activity giving rise to a Section 6(c)(ii) Call Event or breaches any of the provisions of Sections 22(a)(ii) or 22(a)(iii), the Management Stockholder shall be required to pay to the Company any amounts actually paid to him or her or
otherwise received in respect of any repurchase or disposition of any Options or Option Stock (including Net Settled Stock) held by such Management Stockholder; provided that with respect to Option Stock (including Net Settled Stock), the
Management Stockholder shall be required to pay to the Company only such amounts, if any, that the Management Stockholder received in excess of the exercise or purchase price paid by the Management Stockholder in acquiring such Stock, on a net
after-tax basis; provided further, in the event the Management Stockholder engages in activity giving rise to a Section 6(c)(ii) Call Event (to the extent the provisions of Section 6(c)(iii) are applicable) or breaches any of the
provisions of Section 22(a)(ii), the provisions of this Section 22(c) shall be the Company’s sole remedy. 

  
 20 

 23. Irrevocable Proxy. Subject to and to the extent permitted by the laws of the
State of Texas, each Management Stockholder hereby irrevocably appoints Parent and any authorized representatives and designees thereof as its lawful proxy and attorney-in-fact to exercise with full power in such Management Stockholder’s name
and on its behalf such Management Stockholder’s right to vote all of the shares of outstanding Common Stock owned by the Management Stockholder at any regular or special meeting of the stockholders of the Company for the express purpose of
electing any one or more members to the Board or approving any Change in Control transaction or agreement. If voting under such proxy Parent and any authorized representatives and designees thereof shall vote under this proxy on behalf of each such
Management Stockholder in the same manner as Parent votes any outstanding shares of Common Stock owned by it at any such regular or special meeting of the stockholders of the Company for the express purpose of electing any one or more members to the
Board or approving any Change in Control transaction or agreement. This proxy is irrevocable and is coupled with an interest and shall not be terminable as long as this Agreement remains effective among the parties hereto, their successors,
transferees and assigns and, if such Management Stockholder is a natural person, shall not terminate on the disability or incompetence of such Management Stockholder. The Company is hereby requested and directed to honor this proxy upon its
presentation by Parent and any authorized representatives and designees thereof, without any duty of investigation whatsoever on the part of the Company. Each such Management Stockholder agrees that the Company, and the Company’s secretary
shall not be liable to such Management Stockholder for so honoring this proxy. This Section 23 shall terminate and be of no further force or effect upon the later of (x) the fifth anniversary of the Closing Date or (y) the
consummation of a Qualified Public Offering. 
 [Signatures on next page.] 

  
 21 

 IN WITNESS WHEREOF, the Parties have executed this Agreement as of the date first above
written. 
  

	
	ENERGY FUTURE HOLDINGS CORP.
	
	  
	 Richard J. Landy
 Executive
Vice President
 Human Resources & Administration

 
  
  

			
	 TEXAS ENERGY FUTURE HOLDINGS
 LIMITED PARTNERSHIP

		
	By:	 	 Texas Energy Future Capital Holdings
 LLC, its General Partner

		
	By:	 	 

			
		
	Name:	 	 

			
		
	Title:	 	 
		 	

  
 [Signature page to
Management Stockholder’s Agreement] 
  

 
	
	MANAGEMENT STOCKHOLDER:
	
	  
	
	 ̈  The above-signed represents that he/she is an “accredited investor” as defined in Rule 501(a) of Regulation
D, as amended, under the Act.

  
  

[Signature page to Management Stockholder’s Agreement] 

 Schedule I 
 PURCHASED STOCK 
 Number of shares of Purchased Stock (up to
0) (to be purchased at the Base Price): 
 Base Price: $[        ]

 Number of shares of Rollover Stock being applied towards purchase of Purchased Stock 

(applicable only to Management Stockholders with Rollover Stock):
    N/A

Source: [{"source": "alea-institute/alea-institute/kl3m-data-edgar-agreements/train-00184-of-00352.parquet"}, [{"source": "alea-institute/alea-institute/kl3m-data-edgar-agreements/train-00184-of-00352.parquet"}]]