Document:

2011 Employee Stock Purchase Plan

 Exhibit 10.28 
 ARGOS THERAPEUTICS, INC. 
 2011 EMPLOYEE STOCK PURCHASE PLAN 

The purpose of this Plan is to provide eligible employees of Argos Therapeutics, Inc. (the “Company”) and certain of its
subsidiaries with opportunities to purchase shares of the Company’s common stock, $0.001 par value (the “Common Stock”), commencing on the effective date in 2012 of a Qualified Public Offering (as such term is defined in the Fifth
Certificate of Amendment of the Company’s Third Amended and Restated Certificate of Incorporation (the “Fifth Amendment”)). A number of shares of Common Stock equal to the lower of (i) 9,500,000 shares of Common Stock (prior to
giving effect to, and subject to adjustment as a result of, the Reverse Stock Split effected pursuant to the Fifth Amendment) and (ii) 13.63 percent of the number of shares of Common Stock set forth in Section 4(a)(1)(A) of the
Company’s 2011 Stock Incentive Plan have been approved for this purpose, subject to any adjustment pursuant to Section 15 hereof. This Plan is intended to qualify as an “employee stock purchase plan” as defined in
Section 423 of the Internal Revenue Code of 1986, as amended (the “Code”), and the regulations issued thereunder, and shall be interpreted consistent therewith. 
 1. Administration. The Plan will be administered by the Company’s Board of Directors (the “Board”) or by a Committee appointed by the Board (the “Committee”). The Board or
the Committee has authority to make rules and regulations for the administration of the Plan and its interpretation and decisions with regard thereto shall be final and conclusive. 

2. Eligibility. All employees of the Company and all employees of any subsidiary of the Company (as defined in Section 424(f)
of the Code) designated by the Board or the Committee from time to time (a “Designated Subsidiary”), are eligible to participate in any one or more of the offerings of Options (as defined in Section 9) to purchase Common Stock under
the Plan provided that: 
 (a) they are customarily employed by the Company or a Designated Subsidiary for more
than 20 hours a week and for more than five months in a calendar year; 
 (b) they have been employed by the
Company or a Designated Subsidiary for at least twelve months prior to enrolling in the Plan; and 
 (c) they are
employees of the Company or a Designated Subsidiary on the first day of the applicable Plan Period (as defined below). 

No employee may be granted an Option hereunder if such employee, immediately after the Option is granted, owns 5% or more of the
total combined voting power or value of the stock of the Company or any subsidiary. For purposes of the preceding sentence, the attribution rules of Section 424(d) of the Code shall apply in determining the stock ownership of an employee,
and all stock that the employee has a contractual right to purchase shall be treated as stock owned by the employee. 

  
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 The Company retains the discretion to determine which eligible employees may participate in
an offering pursuant to and consistent with Treasury Regulation Sections 1.423-2(e) and (f). 
 3. Offerings. The Company
will make one or more offerings (“Offerings”) to employees to purchase stock under this Plan. Offerings will begin at such time or times as the Board shall determine. The first day of an Offering is the “Offering Commencement
Date”. Each Offering Commencement Date will begin a six month period (a “Plan Period”) during which payroll deductions will be made and held for the purchase of Common Stock at the end of the Plan Period. The Board or the Committee
may, at its discretion, choose a different Plan Period of twelve (12) months or less for Offerings. 
 4.
Participation. An employee eligible on the Offering Commencement Date of any Offering may participate in such Offering by completing and forwarding either a written or electronic payroll deduction authorization form to the employee’s
appropriate payroll office at least seven days prior to the applicable Offering Commencement Date. The form will authorize a regular payroll deduction from the Compensation received by the employee during the Plan Period. Unless an
employee files a new form or withdraws from the Plan, his deductions and purchases will continue at the same rate for future Offerings under the Plan as long as the Plan remains in effect. The term “Compensation” means the amount of money
reportable on the employee’s Federal Income Tax Withholding Statement, excluding overtime, shift premium, incentive or bonus awards, allowances and reimbursements for expenses such as relocation allowances for travel expenses, income or gains
associated with the grant or vesting of restricted stock, income or gains on the exercise of Company stock options or stock appreciation rights, and similar items, whether or not shown or separately identified on the employee’s Federal Income
Tax Withholding Statement, but including, in the case of salespersons, sales commissions to the extent determined by the Board or the Committee. 
 5. Deductions. The Company will maintain payroll deduction accounts for all participating employees. With respect to any Offering made under this Plan, an employee may authorize a payroll deduction
in any dollar amount up to a maximum of 10% of the Compensation he or she receives during the Plan Period or such shorter period during which deductions from payroll are made. The Board or the Committee may, at its discretion, designate a lower
maximum contribution rate. The minimum payroll deduction is such percentage of Compensation as may be established from time to time by the Board or the Committee. 
 6. Deduction Changes. An employee may decrease or discontinue his payroll deduction once during any Plan Period, by filing either a written or electronic new payroll deduction authorization
form. However, an employee may not increase his payroll deduction during a Plan Period. If an employee elects to discontinue his payroll deductions during a Plan Period, but does not elect to withdraw his funds pursuant to Section 8
hereof, funds deducted prior to his election to discontinue will be applied to the purchase of Common Stock on the Exercise Date (as defined below). 
 7. Interest. Interest will not be paid on any employee accounts, except to the extent that the Board or the Committee, in its sole discretion, elects to credit employee accounts with interest
at such rate as it may from time to time determine. 

  
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 8. Withdrawal of Funds. An employee may at any time prior to the close of business on
the last business day in a Plan Period and for any reason permanently draw out the balance accumulated in the employee’s account and thereby withdraw from participation in an Offering. Partial withdrawals are not permitted. The employee may not
begin participation again during the remainder of the Plan Period during which the employee withdrew his or her balance. The employee may participate in any subsequent Offering in accordance with terms and conditions established by the Board or the
Committee. 
 9. Purchase of Shares. 
 (a) Number of Shares. On the Offering Commencement Date of each Plan Period, the Company will grant to each eligible employee who is then a participant in the Plan an option (an “Option”)
to purchase on the last business day of such Plan Period (the “Exercise Date”) at the applicable purchase price (the “Option Price”) up to a whole number of shares of Common Stock determined by multiplying $2,083 by the number of
full months in the Plan Period and dividing the result by the closing price (as determined below) on the Offering Commencement Date; provided, however, that no employee may be granted an Option which permits his rights to purchase Common Stock under
this Plan and any other employee stock purchase plan (as defined in Section 423(b) of the Code) of the Company and its subsidiaries, to accrue at a rate which exceeds $25,000 of the fair market value of such Common Stock (determined at the date
such Option is granted) for each calendar year in which the Option is outstanding at any time. 
 (b) Option Price. The
Board or the Committee shall determine the Option Price for each Plan Period, including whether such Option Price shall be determined based on the lesser of the closing price of the Common Stock on (i) the first business day of the Plan Period
or (ii) the Exercise Date, or shall be based solely on the closing price of the Common Stock on the Exercise Date; provided, however, that such Option Price shall be at least 85% of the applicable closing price. In the absence of a
determination by the Board or the Committee, the Option Price will be 85% of the lesser of the closing price of the Common Stock on (i) the first business day of the Plan Period or (ii) the Exercise Date. The closing price shall be
(a) the closing price (for the primary trading session) on any national securities exchange on which the Common Stock is listed or (b) the average of the closing bid and asked prices in the over-the-counter-market, whichever is applicable,
as published in The Wall Street Journal or another source selected by the Board or the Committee. If no sales of Common Stock were made on such a day, the price of the Common Stock shall be the reported price for the next preceding day on
which sales were made. 
 (c) Exercise of Option. Each employee who continues to be a participant in the Plan on the
Exercise Date shall be deemed to have exercised his Option at the Option Price on such date and shall be deemed to have purchased from the Company the number of whole shares of Common Stock reserved for the purpose of the Plan that his accumulated
payroll deductions on such date will pay for, but not in excess of the maximum numbers determined in the manner set forth above. 
 (d) Return of Unused Payroll Deductions. Any balance remaining in an employee’s payroll deduction account at the end of a Plan Period will be automatically refunded

  
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to the employee, except that any balance that is less than the purchase price of one share of Common Stock will be carried forward into the employee’s payroll deduction account for the
following Offering, unless the employee elects not to participate in the following Offering under the Plan, in which case the balance in the employee’s account shall be refunded. 

10. Issuance of Certificates. Certificates representing shares of Common Stock purchased under the Plan may be issued only in the
name of the employee, in the name of the employee and another person of legal age as joint tenants with rights of survivorship, or (in the Company’s sole discretion) in the name of a brokerage firm, bank, or other nominee holder designated by
the employee. The Company may, in its sole discretion and in compliance with applicable laws, authorize the use of book entry registration of shares in lieu of issuing stock certificates. 

11. Rights on Retirement, Death or Termination of Employment. If a participating employee's employment ends before the last
business day of a Plan Period, no payroll deduction shall be taken from any pay then due and owing to the employee and the balance in the employee’s account shall be paid to the employee. In the event of the employee’s death before the
last business day of a Plan Period, the Company shall, upon notification of such death, pay the balance of the employee’s account (a) to the executor or administrator of the employee’s estate or (b) if no such executor or
administrator has been appointed to the knowledge of the Company, to such other person(s) as the Company may, in its discretion, designate. If, before the last business day of the Plan Period, the Designated Subsidiary by which an employee is
employed ceases to be a subsidiary of the Company, or if the employee is transferred to a subsidiary of the Company that is not a Designated Subsidiary, the employee shall be deemed to have terminated employment for the purposes of this
Plan. 
 12. Optionees Not Stockholders. Neither the granting of an Option to an employee nor the deductions from
his or her pay shall make such employee a stockholder of the shares of Common Stock covered by an Option under this Plan until he or she has purchased and received such shares. 

13. Options Not Transferable. Options under this Plan are not transferable by a participating employee other than by will or the
laws of descent and distribution, and are exercisable during the employee’s lifetime only by the employee. 
 14.
Application of Funds. All funds received or held by the Company under this Plan may be combined with other corporate funds and may be used for any corporate purpose. 
 15. Adjustment for Changes in Common Stock and Certain Other Events. 
 (a) Changes in Capitalization. In the event of any stock split, reverse stock split, stock dividend, recapitalization, combination of shares, reclassification of shares, spin-off or other similar
change in capitalization or event, or any dividend or distribution to holders of Common Stock other than an ordinary cash dividend, (i) the number and class of securities available under this Plan, (ii) the share limitations set forth in
Section 9, and (iii) the Option Price shall be equitably adjusted to the extent determined by the Board or the Committee. 
 (b) Reorganization Events. 

  
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 (1) Definition. A “Reorganization Event” shall mean: (a) any merger
or consolidation of the Company with or into another entity as a result of which all of the Common Stock of the Company is converted into or exchanged for the right to receive cash, securities or other property or is cancelled, (b) any transfer
or disposition of all of the Common Stock of the Company for cash, securities or other property pursuant to a share exchange or other transaction or (c) any liquidation or dissolution of the Company. 

(2) Consequences of a Reorganization Event on Options. In connection with a Reorganization Event, the Board or the Committee may
take any one or more of the following actions as to outstanding Options on such terms as the Board or the Committee determines: (i) provide that Options shall be assumed, or substantially equivalent Options shall be substituted, by the
acquiring or succeeding corporation (or an affiliate thereof), (ii) upon written notice to employees, provide that all outstanding Options will be terminated immediately prior to the consummation of such Reorganization Event and that all such
outstanding Options will become exercisable to the extent of accumulated payroll deductions as of a date specified by the Board or the Committee in such notice, which date shall not be less than ten (10) days preceding the effective date of the
Reorganization Event, (iii) upon written notice to employees, provide that all outstanding Options will be cancelled as of a date prior to the effective date of the Reorganization Event and that all accumulated payroll deductions will be
returned to participating employees on such date, (iv) in the event of a Reorganization Event under the terms of which holders of Common Stock will receive upon consummation thereof a cash payment for each share surrendered in the
Reorganization Event (the “Acquisition Price”), change the last day of the Plan Period to be the date of the consummation of the Reorganization Event and make or provide for a cash payment to each employee equal to (A) (i) the
Acquisition Price times (ii) the number of shares of Common Stock that the employee’s accumulated payroll deductions as of immediately prior to the Reorganization Event could purchase at the Option Price, where the Acquisition Price is
treated as the fair market value of the Common Stock on the last day of the applicable Plan Period for purposes of determining the Option Price under Section 9(b) hereof, and where the number of shares that could be purchased is subject to the
limitations set forth in Section 9(a), minus (B) the result of multiplying such number of shares by such Option Price, (v) provide that, in connection with a liquidation or dissolution of the Company, Options shall convert into the
right to receive liquidation proceeds (net of the Option Price thereof) and (vi) any combination of the foregoing. 
 For
purposes of clause (i) above, an Option shall be considered assumed if, following consummation of the Reorganization Event, the Option confers the right to purchase, for each share of Common Stock subject to the Option immediately prior to the
consummation of the Reorganization Event, the consideration (whether cash, securities or other property) received as a result of the Reorganization Event by holders of Common Stock for each share of Common Stock held immediately prior to the
consummation of the Reorganization Event (and if holders were offered a choice of consideration, the type of consideration chosen by the holders of a majority of the outstanding shares of Common Stock); provided, however, that if the consideration
received as a result of the Reorganization Event is not solely common stock of the acquiring or succeeding corporation (or an affiliate thereof), the Company may, with the consent of the acquiring or succeeding corporation, provide for the
consideration to be received upon the exercise of Options to consist solely of such number of shares of common stock of the acquiring 

  
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or succeeding corporation (or an affiliate thereof) that the Board determines to be equivalent in value (as of the date of such determination or another date specified by the Board) to the per
share consideration received by holders of outstanding shares of Common Stock as a result of the Reorganization Event. 
 16.
Amendment of the Plan. The Board may at any time, and from time to time, amend or suspend this Plan or any portion thereof, except that (a) if the approval of any such amendment by the stockholders of the Company is required by
Section 423 of the Code, such amendment shall not be effected without such approval, and (b) in no event may any amendment be made that would cause the Plan to fail to comply with Section 423 of the Code. 

17. Insufficient Shares. If the total number of shares of Common Stock specified in elections to be purchased under any Offering
plus the number of shares purchased under previous Offerings under this Plan exceeds the maximum number of shares issuable under this Plan, the Board or the Committee will allot the shares then available on a pro-rata basis. 

18. Termination of the Plan. This Plan may be terminated at any time by the Board. Upon termination of this Plan all amounts in
the accounts of participating employees shall be promptly refunded. 
 19. Governmental Regulations. The Company’s
obligation to sell and deliver Common Stock under this Plan is subject to listing on a national stock exchange (to the extent the Common Stock is then so listed or quoted) and the approval of all governmental authorities required in connection
with the authorization, issuance or sale of such stock. 
 20. Governing Law. The Plan shall be governed by Delaware law
except to the extent that such law is preempted by federal law. 
 21. Issuance of Shares. Shares may be issued upon
exercise of an Option from authorized but unissued Common Stock, from shares held in the treasury of the Company, or from any other proper source. 
 22. Notification upon Sale of Shares. Each employee agrees, by entering the Plan, to promptly give the Company notice of any disposition of shares purchased under the Plan where such disposition
occurs within two years after the date of grant of the Option pursuant to which such shares were purchased. 
 23. Grants to
Employees in Foreign Jurisdictions. The Company may, to comply with the laws of a foreign jurisdiction, grant Options to employees of the Company or a Designated Subsidiary who are citizens or residents of such foreign jurisdiction (without
regard to whether they are also citizens of the United States or resident aliens (within the meaning of Section 7701(b)(1)(A) of the Code)) with terms that are less favorable (but not more favorable) than the terms of Options granted under the
Plan to employees of the Company or a Designated Subsidiary who are resident in the United States. Notwithstanding the preceding provisions of this Plan, employees of the Company or a Designated Subsidiary who are citizens or residents of a foreign
jurisdiction (without regard to whether they are also citizens of the United States or resident aliens (within the meaning of Section 7701(b)(1)(A) of the Code)) may be excluded from eligibility under the Plan if (a) the grant of an Option
under the Plan to a citizen or resident 

  
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of the foreign jurisdiction is prohibited under the laws of such jurisdiction or (b) compliance with the laws of the foreign jurisdiction would cause the Plan to violate the requirements of
Section 423 of the Code. The Company may add one or more appendices to this Plan describing the operation of the Plan in those foreign jurisdictions in which employees are excluded from participation or granted less favorable Options.

 24. Authorization of Sub-Plans. The Board may from time to time establish one or more sub-plans under the Plan with
respect to one or more Designated Subsidiaries, provided that such sub-plan complies with Section 423 of the Code. 
 25.
Withholding. If applicable tax laws impose a tax withholding obligation, each affected employee shall, no later than the date of the event creating the tax liability, make provision satisfactory to the Board for payment of any taxes required
by law to be withheld in connection with any transaction related to Options granted to or shares acquired by such employee pursuant to the Plan. The Company may, to the extent permitted by law, deduct any such taxes from any payment of any kind
otherwise due to an employee. 
 26. Effective Date and Approval of Stockholders. The Plan shall take effect on the date
on which the Plan is approved by the stockholders of the Company as required by Section 423 of the Code, which approval must occur within twelve months of the adoption of the Plan by the Board. 

  
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 Adopted by the Board of Directors 

on September 21, 2011 
 Approved by the stockholders 
 on December 21, 2011

  
 -8-Separation and Distribution Agreement, dated as of December 30, 2011

 Exhibit 10.1 

 
  
 SEPARATION AND DISTRIBUTION AGREEMENT 
 by and between 

THE WILLIAMS COMPANIES, INC., 
 and 
 WPX ENERGY, INC. 

Dated as of December 30, 2011 
  

 

 TABLE OF CONTENTS 

 

							
	 	  	 	  	Page	 
		
	 ARTICLE I DEFINITIONS
	  	 	2	  
			
	        Section 1.1	  	Table of Definitions	  	 	3	  
	        Section 1.2	  	Certain Defined Terms	  	 	8	  
		
	 ARTICLE II THE CONTRIBUTION
	  	 	8	  
			
	        Section 2.1	  	Contribution of WPX Assets	  	 	8	  
	        Section 2.2	  	Assumption of Liabilities	  	 	8	  
	        Section 2.3	  	Effective Time; Deliveries	  	 	8	  
	        Section 2.4	  	Transfers Not Effected on or before the Effective Time	  	 	9	  
	        Section 2.5	  	Termination of Agreements	  	 	10	  
	        Section 2.6	  	Governmental Approvals and Consents	  	 	10	  
	        Section 2.7	  	Disclaimer of Representations and Warranties	  	 	11	  
		
	 ARTICLE III ACTIONS PENDING THE DISTRIBUTION
	  	 	11	  
			
	        Section 3.1	  	Actions Prior to the Distribution	  	 	11	  
	        Section 3.2	  	Conditions to the Distribution	  	 	12	  
		
	 ARTICLE IV THE DISTRIBUTION
	  	 	13	  
			
	        Section 4.1	  	The Distribution	  	 	13	  
	        Section 4.2	  	Fractional Shares	  	 	14	  
	        Section 4.3	  	Sole Discretion of the WMB Board	  	 	14	  
		
	 ARTICLE V EXCHANGE OF INFORMATION; CONFIDENTIALITY
	  	 	14	  
			
	        Section 5.1	  	Agreement for Exchange of Information	  	 	14	  
	        Section 5.2	  	Ownership of Information	  	 	15	  
	        Section 5.3	  	Compensation for Providing Information	  	 	15	  
	        Section 5.4	  	Record Retention	  	 	16	  
	        Section 5.5	  	Limitation of Liability	  	 	16	  
	        Section 5.6	  	Other Agreements Providing for Exchange of Information	  	 	16	  
	        Section 5.7	  	Cooperation	  	 	16	  
	        Section 5.8	  	Confidentiality	  	 	16	  
	        Section 5.9	  	Protective Arrangements	  	 	17	  
		
	 ARTICLE VI ADDITIONAL COVENANTS AND OTHER MATTERS
	  	 	18	  
			
	        Section 6.1	  	Further Assurances	  	 	18	  
	        Section 6.2	  	Use of Names, Logos and Information	  	 	18	  

							
	        Section 6.3	  	Non-Solicitation	  	 	19	  
	        Section 6.4	  	Information Technology Transition Costs	  	 	20	  
		
	 ARTICLE VII MUTUAL RELEASES; INDEMNIFICATION
	  	 	20	  
			
	        Section 7.1	  	Mutual Releases	  	 	20	  
	        Section 7.2	  	Indemnification by WPX	  	 	21	  
	        Section 7.3	  	Indemnification by WMB	  	 	22	  
	        Section 7.4	  	Indemnification Obligations Net of Insurance Proceeds and Other Amounts	  	 	23	  
	        Section 7.5	  	Third-Party Claims	  	 	24	  
	        Section 7.6	  	Additional Matters	  	 	25	  
	        Section 7.7	  	Remedies Cumulative	  	 	26	  
	        Section 7.8	  	Survival of Indemnities	  	 	26	  
	        Section 7.9	  	Limitation on Liability	  	 	26	  
		
	 ARTICLE VIII TERMINATION
	  	 	26	  
			
	        Section 8.1	  	Termination	  	 	26	  
	        Section 8.2	  	Effect of Termination	  	 	26	  
		
	 ARTICLE IX DISPUTE RESOLUTION
	  	 	26	  
			
	        Section 9.1	  	Disputes	  	 	26	  
	        Section 9.2	  	Escalation; Mediation	  	 	27	  
	        Section 9.3	  	Court Actions	  	 	28	  
		
	 ARTICLE X MISCELLANEOUS
	  	 	29	  
			
	        Section 10.1	  	Corporate Power	  	 	29	  
	        Section 10.2	  	Coordination with Certain Ancillary Agreements; Conflicts	  	 	29	  
	        Section 10.3	  	Expenses	  	 	29	  
	        Section 10.4	  	Amendment and Modification.	  	 	29	  
	        Section 10.5	  	Waiver	  	 	29	  
	        Section 10.6	  	Notices	  	 	30	  
	        Section 10.7	  	Interpretation	  	 	30	  
	        Section 10.8	  	Entire Agreement	  	 	31	  
	        Section 10.9	  	No Third Party Beneficiaries	  	 	31	  
	        Section 10.10	  	Governing Law	  	 	31	  
	        Section 10.11	  	Submission to Jurisdiction	  	 	31	  
	        Section 10.12	  	Assignment	  	 	31	  
	        Section 10.13	  	Severability	  	 	32	  
	        Section 10.14	  	Waiver of Jury Trial	  	 	32	  
	        Section 10.15	  	Counterparts	  	 	32	  
	        Section 10.16	  	Facsimile Signature	  	 	32	  

  
 ii 

			
	Exhibit A	 	Contributed Entities
	Schedule 2.5(b)(v)	 	Surviving Agreements
	Schedule 7.3	 	Contracts Excluded From Indemnification
	Schedule 7.3(d)	 	California Gas Marketing Proceedings
	Schedule 7.3(e)	 	Gas Price Indices Proceedings

  
 iii

 SEPARATION AND DISTRIBUTION AGREEMENT 

SEPARATION AND DISTRIBUTION AGREEMENT, dated as of December 30, 2011 (this “Agreement”), by and between The
Williams Companies, Inc., a Delaware corporation (“WMB”), and WPX Energy, Inc., a Delaware corporation (“WPX”). 
 RECITALS 
 A. The WMB Board has determined that it would be appropriate,
desirable and in the best interests of WMB and WMB’s stockholders to separate WMB into two publicly traded companies: (i) WMB, which will continue to own and conduct, directly and indirectly, the WMB Business, and (ii) WPX, which will
own and conduct, directly and indirectly, the WPX Business. 
 B. In connection with the separation of the WPX Business from
WMB, WMB desires to contribute or otherwise transfer, and to cause certain of its Subsidiaries to contribute or otherwise transfer, certain Assets and Liabilities associated with the WPX Business, including the stock or other equity interests of
certain of WMB’s Subsidiaries dedicated to the WPX Business, to WPX and certain of WPX’s Subsidiaries (collectively, the “Contribution”). 
 C. On the Distribution Date, and subject to the terms and conditions of this Agreement, WMB will distribute to holders of shares of WMB Common Stock, on a pro rata basis, all the outstanding shares
of common stock, par value $0.01 per share, of WPX (“WPX Common Stock”) owned by WMB on the Distribution Date (the “Distribution”). 
 D. WMB and WPX intend that the Contribution and Distribution, taken together, will qualify as a reorganization for U.S. federal income tax purposes pursuant to which no gain or loss will be recognized by
WMB or its stockholders under Section 355, 361(b)(3), 368(a)(1)(D) and related provisions of the Code, and that this Agreement is intended to be, and is hereby adopted as, a plan of reorganization under Section 368 of the Code. 

E. The parties intend this Agreement and the Ancillary Agreements to set forth the principal arrangements between them regarding the
Contribution and Distribution. 
 AGREEMENT 
 In consideration of the foregoing and the mutual covenants and agreements herein contained, and intending to be legally bound hereby, the parties agree as follows: 

 ARTICLE I 
 DEFINITIONS 
 Section 1.1 Table of Definitions. The following
terms have the meanings set forth on the pages referenced below: 

 

					
	 Definition
	  	Page	 
		
	 Action
	  	 	3	  
	 Affiliate
	  	 	3	  
	 Agent
	  	 	3	  
	 Agreement
	  	 	1	  
	 Ancillary Agreements
	  	 	3	  
	 Assets
	  	 	3	  
	 Bad Act
	  	 	8	  
	 Business Day
	  	 	3	  
	 Code
	  	 	3	  
	 Consents
	  	 	3	  
	 Contract
	  	 	3	  
	 Contribution
	  	 	1	  
	 CPR
	  	 	27	  
	 Distribution
	  	 	1	  
	 Distribution Date
	  	 	3	  
	 Distribution Ratio
	  	 	4	  
	 Effective Time
	  	 	4	  
	 Employee Matters Agreement
	  	 	4	  
	 Environmental Laws
	  	 	28	  
	 Environmental Liabilities
	  	 	28	  
	 Exchange Act
	  	 	4	  
	 Form 10
	  	 	4	  
	 GAAP
	  	 	4	  
	 Governmental Approvals
	  	 	4	  
	 Governmental Authority
	  	 	4	  
	 Group
	  	 	4	  
	 Hazardous Substances
	  	 	28	  
	 Indemnifying Party
	  	 	23	  
	 Indemnitee
	  	 	23	  
	 Indemnity Payment
	  	 	23	  
	 Information
	  	 	4	  
	 Information Statement
	  	 	4	  
	 Insurance Proceeds
	  	 	5	  
	 Intended Transferee
	  	 	9	  
	 Intended Transferor
	  	 	9	  

 

					
	 Definition
	  	Page	 
		
	 IRS
	  	 	5	  
	 Law
	  	 	5	  
	 Liabilities
	  	 	5	  
	 Next Step Up Representatives
	  	 	27	  
	 Person
	  	 	5	  
	 Proceeding
	  	 	31	  
	 Record Date
	  	 	5	  
	 Record Holders
	  	 	5	  
	 SEC
	  	 	5	  
	 Securities Act
	  	 	6	  
	 Subsidiary
	  	 	6	  
	 Tax or Taxes
	  	 	6	  
	 Tax Sharing Agreement
	  	 	6	  
	 Third-Party Claim
	  	 	24	  
	 Transition Services Agreement
	  	 	6	  
	 WMB
	  	 	1	  
	 WMB Board
	  	 	6	  
	 WMB Business
	  	 	6	  
	 WMB Common Stock
	  	 	6	  
	 WMB Entities
	  	 	6	  
	 WMB Group
	  	 	6	  
	 WMB Indemnitees
	  	 	21	  
	 WMB Liabilities
	  	 	6	  
	 WPX
	  	 	1	  
	 WPX Assets
	  	 	7	  
	 WPX Borrowing
	  	 	7	  
	 WPX Business
	  	 	7	  
	 WPX Common Stock
	  	 	1	  
	 WPX Credit Facility
	  	 	7	  
	 WPX Entities
	  	 	7	  
	 WPX Group
	  	 	7	  
	 WPX Indemnitees
	  	 	22	  
	 WPX Liabilities
	  	 	7	  
	 WPX Notes
	  	 	8	  

 
 

  
 2 

 Section 1.2 Certain Defined Terms. For the purposes of this Agreement:

 “Action” means any claim, demand, action, suit, countersuit, audit, arbitration, inquiry, proceeding or
investigation by or before any Governmental Authority or any United States or non-United States federal, state, local or international arbitration or mediation tribunal. 
 “Affiliate” of any Person means a Person that controls, is controlled by, or is under common control with such Person; provided, however, that for purposes of this Agreement
and the Ancillary Agreements, none of the WMB Entities shall be deemed to be an Affiliate of any WPX Entity and none of the WPX Entities shall be deemed to be an Affiliate of any WMB Entity. As used herein, “control” means the possession,
directly or indirectly, of the power to direct or cause the direction of the management and policies of such entity, whether through ownership of voting securities or other interests, by contract or otherwise. 

“Agent” means the distribution agent to be appointed by the WMB Board to distribute to the Record Holders the shares of
WPX Common Stock pursuant to the Distribution. 
 “Ancillary Agreements” means the Transition Services
Agreement, Tax Sharing Agreement, Employee Matters Agreement and any other instruments, assignments, documents and agreements executed in connection with the implementation of the transactions contemplated by this Agreement. 

“Assets” means assets, properties and rights (including goodwill and rights arising under Contracts), wherever located
(including in the possession of vendors, other Persons or elsewhere), whether real, personal or mixed, tangible, intangible or contingent, in each case whether or not recorded or reflected or required to be recorded or reflected on the books and
records or financial statements of any Person. 
 “Business Day” means a day other than a Saturday, Sunday or
other day on which commercial banks in the State of Oklahoma are authorized or required by law to close. 

“Code” means the Internal Revenue Code of 1986, as amended. 

“Consents” means any consents, waivers or approvals from, or notification requirements to, any Person other than a
member of either Group. 
 “Contract” means any contract, agreement, lease, license, sales order, purchase
order, instrument or other commitment that is binding on any Person or any part of its property under applicable law. 

“Distribution Date” means the date on which the Distribution occurs. 

  
 3 

 “Distribution Ratio” means the number of shares of WPX Common Stock to be
distributed in respect of each share of WMB Common Stock in the Distribution, which ratio shall be determined by the WMB Board prior to the Record Date. 
 “Effective Time” means 12:01 a.m., Eastern time, on the Distribution Date. 
 “Employee Matters Agreement” means the Employee Matters Agreement, dated as of the date hereof, between WMB and WPX, as may be amended or modified from time to time. 

“Exchange Act” means the Securities Exchange Act of 1934, as amended, together with the rules and regulations
promulgated thereunder. 
 “Form 10” means the registration statement on Form 10 filed by WPX with the SEC to
effect the registration of WPX Common Stock pursuant to the Exchange Act in connection with the Distribution, as such registration statement may be amended or supplemented from time to time. 

“GAAP” means U.S. generally accepted accounting principles. 

“Governmental Approvals” means any notices, reports or other filings to be given to or made with, or any releases,
Consents, substitutions, approvals, amendments, registrations, permits or authorizations to be obtained from, any Governmental Authority. 
 “Governmental Authority” means any United States or non-United States federal, state, local, territorial, tribal or international court, government, department, commission, board, bureau,
agency, official or other legislative, judicial, regulatory, administrative or governmental authority. 

“Group” means the WMB Group or the WPX Group, as the context requires. 

“Information” means information, including books and records, whether or not patentable or copyrightable, in written,
oral, electronic or other tangible or intangible forms, stored in any medium, including studies, reports, records, books, contracts, instruments, surveys, discoveries, ideas, concepts, know-how, techniques, designs, specifications, drawings,
blueprints, diagrams, models, prototypes, samples, flow charts, data, computer data, disks, diskettes, tapes, computer programs or other software, marketing plans, customer names, communications by or to attorneys (including attorney-client
privileged communications), memos and other materials prepared by attorneys or under their direction (including attorney work product), and other technical, financial, employee or business information or data. 

“Information Statement” means the Information Statement, attached as an exhibit to Form 10, to be sent to each holder of
WMB Common Stock in connection with the Distribution, as such Information Statement may be amended or supplemented from time to time. 

  
 4 

 “Insurance Proceeds” means, with respect to any Liability to be reimbursed
by an Indemnifying Party that may be covered, in whole or in part, by insurance policies written by third-party providers, the amount of insurance proceeds actually received in cash under such insurance policy with respect to such Liability, net of
any costs in seeking such collection. 
 “IRS” means the U.S. Internal Revenue Service. 

“Law” means any statute, law, regulation, ordinance, rule, judgment, rule of common law, order, decree, government
approval, concession, grant, franchise, license, agreement, directive, guideline, policy, requirement or other governmental restriction or any similar form of decision of, or determination by, or any interpretation or administration of any of the
foregoing by, any Governmental Authority, whether now or hereinafter in effect and, in each case, as amended. 

“Liabilities” means any and all losses, claims, charges, debts, demands, Actions, damages, obligations, payments, costs
and expenses, sums of money, bonds, indemnities and similar obligations, penalties, covenants, Contracts, controversies, agreements, promises, omissions, guarantees, make whole agreements and similar obligations, and other liabilities, including all
contractual obligations, whether absolute or contingent, inchoate or otherwise, matured or unmatured, liquidated or unliquidated, accrued or unaccrued, known or unknown, whenever arising, and including those arising under any Law, Action, threatened
or contemplated Action (including the costs and expenses of demands, assessments, judgments, settlements and compromises relating thereto and attorneys’ fees and any and all costs and expenses (including allocated costs of in-house counsel and
other personnel), whatsoever incurred in investigating, preparing or defending against any such Actions or threatened or contemplated Actions), order or consent decree of any Governmental Authority or any award of any arbitrator of any kind, and
those arising under any contract, commitment or undertaking, including those arising under this Agreement or any Ancillary Agreement or incurred by a party hereto or thereto in connection with enforcing its rights to indemnification hereunder or
thereunder, in each case, whether or not recorded or reflected or required to be recorded or reflected on the books and records or financial statements of any Person. 
 “Person” means an individual, corporation, partnership, limited liability company, limited liability partnership, syndicate, person, trust, association, organization or other entity,
including any Governmental Authority, and including any successor, by merger or otherwise, of any of the foregoing. 

“Record Date” means the close of business on the date to be determined by WMB’s Board of Directors as the record
date for determining the stockholders of WMB entitled to receive shares of WPX Common Stock pursuant to the Distribution. 

“Record Holders” means the holders of WMB Common Stock on the Record Date. 

“SEC” means the U.S. Securities and Exchange Commission. 

  
 5 

 “Securities Act” means the Securities Act of 1933, as amended, together
with the rules and regulations promulgated thereunder. 
 “Subsidiary” of any Person means any corporation or
other organization, whether incorporated or unincorporated, of which at least a majority of the securities or interests having by the terms thereof ordinary voting power to elect at least a majority of the board of directors or others performing
similar functions with respect to such corporation or other organization is directly or indirectly owned or controlled by such Person or by any one or more of its Subsidiaries, or by such Person and one or more of its Subsidiaries; provided,
however, that no Person that is not directly or indirectly wholly owned by any other Person shall be a Subsidiary of such other Person unless such other Person controls, or has the right, power or ability to control, that Person. 

“Tax” or “Taxes” shall have the same meaning as ascribed to such term in the Tax Sharing Agreement.

 “Tax Sharing Agreement” means the Tax Sharing Agreement, dated as of the date hereof, between WMB and WPX,
as may be amended or modified from time to time. 
 “Transition Services Agreement” means the Transition
Services Agreement, dated as of the date hereof, between WMB and WPX, as may be amended or modified from time to time, which provides for WMB’s provision of certain services to WPX on and after the Distribution Date. 

“WMB Board” means the Board of Directors of WMB or an authorized committee thereof. 

“WMB Business” means the business and operations other than the WPX Business conducted by WMB and the WMB Entities
(whether conducted independently or in association with one or more third parties through a partnership, joint venture or other mutual enterprise) at any time prior to, on or after the Effective Time. 

“WMB Common Stock” means the common stock, par value $1.00 per share, of WMB. 

“WMB Entities” means the members of the WMB Group. 

“WMB Group” means WMB and each direct or indirect Subsidiary of WMB, other than Persons in the WPX Group. 

“WMB Liabilities” means (without duplication): (a) any and all Liabilities that are expressly contemplated by this
Agreement or any Ancillary Agreement to be retained or assumed by WMB or any WMB Entity, and all agreements, obligations and Liabilities of any WMB Entity under this Agreement or any of the Ancillary Agreements; (b) all Liabilities to the
extent relating to, arising out of or resulting from the operation of the WMB Business, as conducted at any time prior to, on or after the Effective Time; and (c) all other Liabilities of any member of the WMB Group that are not WPX
Liabilities. 

  
 6 

 “WPX Assets” means all of WMB’s and its Subsidiaries’ right,
title and interest in and to: 
 (a) any and all Assets of WMB and its Subsidiaries that are used exclusively or held for use
exclusively in the WPX Business (other than WMB’s direct or indirect equity interests in Williams Production Services, LLC and Williams Gas Marketing Services, LLC), including without limitation (i) all of WMB’s direct or indirect
stock or other equity interests in the entities set forth on Exhibit A which have been or are hereby contributed as part of the Contribution, and (ii) certain Assets of WMB that may have been previously contributed to WPX; and

 (b) any and all Assets that are expressly listed, scheduled or otherwise clearly described in any Ancillary Agreement as
Assets to be transferred to any WPX Entity. 
 “WPX Borrowing” means the indebtedness of WPX incurred pursuant
to the issuance of the WPX Notes and the WPX Credit Facility. 
 “WPX Business” means the exploration and
production business and any other business and operations conducted by WPX and the WPX Entities (whether conducted independently or in association with one or more third parties through a partnership, joint venture or other mutual enterprise) at any
time prior to, on or after the Effective Time. 
 “WPX Credit Facility” means Credit Agreement, dated as of
June 3, 2011, by and among WPX, the lenders named therein, and Citibank, N.A., as administrative agent and swingline lender. 
 “WPX Entities” means the members of the WPX Group. 
 “WPX
Group” means WPX and each direct or indirect Subsidiary of WPX. 
 “WPX Liabilities” means (without
duplication): 
 (a) any and all Liabilities to the extent arising out of or relating to the WPX Business or the WPX Assets, in
each case whether such Liabilities arise or accrue prior to, on or after the Effective Time (other than Tax-related Liabilities, which are exclusively governed by the Tax Sharing Agreement); 

(b) any and all Liabilities to the extent arising out of or relating to the operation of any business conducted by any WPX Entity at any
time after the Effective Time; 
 (c) any and all Liabilities that are expressly listed, scheduled or otherwise clearly
described in any Ancillary Agreement as Liabilities to be assumed by WPX or any WPX Entity; and 

  
 7 

 (d) all obligations of the WPX Group under or pursuant to this Agreement, any Ancillary
Agreement or any other instrument entered into in connection herewith or therewith. 
 “WPX Notes” means up to
$1.5 billion aggregate principal amount of senior unsecured notes issued by WPX prior to the Distribution on such terms and conditions as agreed to by WMB, WPX and the underwriters for the WPX Notes. 

ARTICLE II 

THE CONTRIBUTION 
 Section 2.1 Contribution of WPX Assets. Unless otherwise provided in this Agreement or in any Ancillary Agreement, on or before the Effective Time, WMB will (and WMB will cause its applicable
Subsidiaries to) assign, transfer and convey to WPX and its applicable Subsidiaries, and WPX will receive and accept from WMB and its applicable Subsidiaries, all of WMB’s and its applicable Subsidiaries’ right, title and interest in and
to the WPX Assets. Such assignments, transfers and conveyances will be effective at such times as provided in each respective Ancillary Agreement and will be subject to the terms and conditions of this Agreement and any applicable Ancillary
Agreement. 
 Section 2.2 Assumption of Liabilities. Unless otherwise provided in this Agreement or in any Ancillary
Agreement, on or before the Effective Time, WPX will (and WPX will cause its applicable Subsidiaries to) assume, and on a timely basis pay, perform, satisfy and discharge the WPX Liabilities in accordance with their respective terms. WPX and its
applicable Subsidiaries will be responsible for all WPX Liabilities, regardless of (a) when or where such Liabilities arose or arise, (b) whether the facts on which they are based occurred on, prior to or subsequent to the Effective Time,
(c) where or against whom such Liabilities are asserted or determined, (d) whether asserted or determined on, prior to or subsequent to the Effective Time, or (e) whether arising from or alleged to arise from negligence, recklessness,
violation of law, fraud or misrepresentation (each, a “Bad Act”) by any member of the WMB Group, the WPX Group or any of their respective past or present representatives; provided, however, that this Section 2.2
will not limit WPX’s right to make a claim against a WMB Group member for Losses suffered by it to the extent that such Losses are a direct result of a Bad Act committed by a WMB Group member subsequent to the Effective Time. Such assumptions
of WPX Liabilities will be effective at such times as provided in each respective Ancillary Agreement and will be subject to the terms and conditions of this Agreement and any applicable Ancillary Agreement. 

Section 2.3 Effective Time; Deliveries. In furtherance of the assignment, transfer and conveyance of the WPX Assets and the
assumption of the WPX Liabilities as set forth in this Agreement and the Ancillary Agreements, unless otherwise provided in this Agreement or in any Ancillary Agreement, on or before the Effective Time, the parties will execute and deliver, and they
will cause their respective Subsidiaries and representatives, as applicable, to execute and deliver: (a) each of the Ancillary Agreements; (b) such bills of sale, stock powers, certificates of title, assignments of 

  
 8 

 
Contracts, subleases and other instruments of transfer, conveyance and assignment as, and to the extent, necessary or convenient to evidence the transfer, conveyance and assignment to WPX (or, as
applicable, its Subsidiaries) of all of WMB’s (or, as applicable, its Subsidiaries’) right, title and interest in and to the WPX Assets; and (c) such assumptions of Contracts and other instruments of assumption as, and to the extent,
necessary or convenient to evidence the valid and effective assumption of the WPX Liabilities by WPX (or, as applicable, its Subsidiaries). 
 Section 2.4 Transfers Not Effected on or before the Effective Time . 

(a) The parties acknowledge and agree that some of the transfers contemplated by this Article II may not be effected on or before the
Effective Time due to the inability of the parties to obtain necessary Consents or approvals or the inability of the parties to take certain other actions necessary to effect such transfers on or before the Effective Time. To the extent any
transfers contemplated by this Article II have not been fully effected on or before the Effective Time, WMB and WPX will cooperate and use commercially reasonable efforts (and will cause the applicable members of its respective Group to use such
efforts) to obtain any necessary Consents or approvals or take any other actions necessary to effect such transfers as promptly as practicable following the Effective Time. 
 (b) Nothing in this Agreement will be deemed to require the transfer or assignment of any Contract or other Asset by any WMB Entity (an “Intended Transferor”) to any WPX Entity (an
“Intended Transferee”) to the extent that such transfer or assignment would constitute a material breach of such Contract or cause forfeiture or loss of such Asset; provided, however, that even if such Contract or
other Asset cannot be so transferred or assigned, such Contract or other Asset will be deemed a WPX Asset solely for purposes of determining whether any Liability is a WPX Liability. 

(c) If an attempted assignment would be ineffective or would impair an Intended Transferee’s rights under any such WPX Asset so that
the Intended Transferee would not receive all such rights, then the parties will use commercially reasonable efforts to provide to, or cause to be provided to, the Intended Transferee, to the extent permitted by law, the rights of any such WPX Asset
and take such other actions as may reasonably be requested by the other party in order to place the Intended Transferee, insofar as reasonably possible, in the same position as if such WPX Asset had been transferred as contemplated hereby. In
connection therewith, (i) the Intended Transferor will promptly pass along to the Intended Transferee when received all benefits derived by the Intended Transferor with respect to any such WPX Asset, and (ii) the Intended Transferee will
pay, perform and discharge on behalf of the Intended Transferor all of the Intended Transferor’s obligations with respect to any such WPX Asset in a timely manner and in accordance with the terms thereof which it may do without breach. If and
when such Consents or approvals are obtained or such other required actions have been taken, the transfer of the applicable WPX Asset will be effected in accordance with the terms of this Agreement and any applicable Ancillary Agreement. 

  
 9 

 Section 2.5 Termination of Agreements. 

(a) Except as set forth in Section 2.5(b), the WMB Entities, on the one hand, and the WPX Entities, on the other hand, hereby
terminate any and all agreements, arrangements, commitments or understandings (including intercompany work orders), whether or not in writing, between or among any WMB Entity, on the one hand, and any WPX Entity, on the other hand, effective as of
the Effective Time. No such terminated agreement, arrangement, commitment or understanding (including any provision thereof that purports to survive termination) shall be of any further force or effect from and after the Effective Time. Each party
shall, at the reasonable request of the other party, take, or cause to be taken, such other actions as may be necessary to effect the foregoing. 
 (b) The provisions of Section 2.5(a) shall not apply to any of the following agreements, arrangements, commitments or understandings (or to any of the provisions thereof): 

(i) this Agreement and the Ancillary Agreements (and each other agreement or instrument expressly contemplated by this Agreement or any
Ancillary Agreement to be entered into by any WMB Entity or WPX Entity); 
 (ii) any agreements, arrangements, commitments or
understandings to which any non-wholly owned Subsidiary or non-wholly owned Affiliate of WMB or WPX, as the case may be, is a party; 
 (iii) any other agreements, arrangements, commitments or understandings that this Agreement or any Ancillary Agreement expressly contemplates will survive the Effective Time; 

(iv) any confidentiality or non-disclosure agreements among any members of either Group or employees of any member of either Group,
including any obligation not to disclose proprietary or privileged information; and 
 (v) any agreements, arrangements,
commitments or understandings listed or described on Schedule 2.5(b)(v). 
 (c) Except as otherwise expressly and
specifically provided in this Agreement or any Ancillary Agreement, all intercompany receivables, payables, loans and other accounts between any WMB Entity, on the one hand, and any WPX Entity, on the other hand, in existence as of immediately prior
to the Effective Time shall be satisfied and/or settled by the relevant members of the WMB Group and the WPX Group no later than the Effective Time by (i) forgiveness by the relevant obligor or (ii) one or a related series of repayments,
distributions of and/or contributions to capital, in each case as determined by WMB. 
 Section 2.6 Governmental
Approvals and Consents. To the extent that any of the transactions contemplated by this Agreement or any Ancillary Agreement requires any Governmental Approval or Consent, the parties will use their reasonable best efforts to obtain such
Governmental Approval or Consent. 

  
 10 

 Section 2.7 Disclaimer of Representations and Warranties. Each of WMB (on behalf
of itself and each other WMB Entity) and WPX (on behalf of itself and each other WPX Entity) understands and agrees that, except as expressly set forth herein or in any Ancillary Agreement, no party (including its Affiliates) to this Agreement, any
Ancillary Agreement or any other agreement or document contemplated by this Agreement, any Ancillary Agreement or otherwise, is making any representations or warranties relating in any way to the Contribution, Distribution or WPX Assets. 

ARTICLE III 

ACTIONS PENDING THE DISTRIBUTION 
 Section 3.1 Actions Prior to the Distribution. 
 (a) Subject to the
conditions specified in Section 3.2 and subject to Section 4.3, each of the parties shall use its reasonable best efforts to consummate the Distribution. Such actions shall include those specified in this Section 3.1. 

(b) Prior to the Distribution, each of the parties will execute and deliver all Ancillary Agreements to which it is a party, and will
cause the other WMB Entities and WPX Entities, as applicable, to execute and deliver any Ancillary Agreements to which such Persons are parties. 
 (c) Prior to the Distribution, WPX shall mail the Information Statement to the Record Holders. 
 (d) WPX shall prepare, file with the SEC and use its reasonable best efforts to cause to become effective any registration statements or amendments thereto required to effect the establishment of, or
amendments to, any employee benefit and other plans necessary or appropriate in connection with the transactions contemplated by this Agreement or any of the Ancillary Agreements. 

(e) Each of the parties shall take all such actions as may be necessary or appropriate under the securities or blue sky Laws of the
states or other political subdivisions of the United States or of other foreign jurisdictions in connection with the Distribution. 
 (f) WPX shall prepare and file, and shall use reasonable best efforts to have approved prior to the Distribution, an application for the listing on the NYSE or another national securities exchange of the
WPX Common Stock to be distributed in the Distribution, subject to official notice of listing. 
 (g) Prior to the Distribution,
the existing directors of WPX shall duly elect the individuals listed as members of the WPX board of directors in the Information Statement, and such individuals shall become the members of the WPX board of directors effective as of no later than
immediately prior to the Distribution. 

  
 11 

 (h) Prior to the Distribution, WMB shall deliver or cause to be delivered to WPX the
resignation from each applicable WPX Entity, effective as of no later than immediately prior to the Distribution, of each individual who will be an employee of any WMB Entity after the Distribution and who is an officer or director of any WPX Entity
immediately prior to the Distribution. 
 (i) Immediately prior to the Distribution, the Restated Certificate of Incorporation
and Restated Bylaws of WPX, each in substantially the form filed as an exhibit to the Form 10, shall be in effect. 
 (j)
The parties shall, subject to Section 4.3, take all reasonable steps necessary and appropriate to cause the conditions set forth in Section 3.2 to be satisfied and to effect the Distribution on the Distribution Date. 

Section 3.2 Conditions to the Distribution. The obligations of the parties to consummate the Distribution shall be
conditioned on the satisfaction, or waiver by the WMB Board, in its sole and absolute discretion, of the following conditions: 

(a) The WMB Board shall, in its sole and absolute discretion, have authorized and approved the Contribution and Distribution and not
withdrawn such authorization and approval. 
 (b) The WMB Board shall have declared the dividend of WPX Common Stock to the
Record Holders. 
 (c) Each Ancillary Agreement shall have been executed by each party thereto. 

(d) The SEC shall have declared the Form 10 effective, no stop order suspending the effectiveness of the Form 10 shall be in
effect, and no proceedings for such purpose shall be pending before or threatened by the SEC. 
 (e) The WPX Common Stock shall
have been accepted for listing on the NYSE or another national securities exchange approved by the WMB Board, subject to official notice of issuance. 
 (f) WMB shall have received an opinion from WMB’s legal advisors regarding the tax consequences of the Contribution and Distribution and such other matters, as it will determine to be necessary or
advisable in its sole and absolute discretion, each of which shall remain in full force and effect, that the Contribution and Distribution will not result in recognition for U.S. Federal income tax purposes, of income, gain or loss to WMB, or of
income, gain or loss to its stockholders, except to the extent of cash received in lieu of fractional shares of WPX Common Stock. 
 (g) WPX shall have received the net proceeds from the Notes and shall have made a cash distribution of approximately $979 million to Williams; 

(h) An independent firm acceptable to WMB, in its sole and absolute discretion, shall have delivered one or more opinions to the WMB
Board confirming the solvency and financial viability of WMB and WPX, which opinions shall be in form and substance satisfactory to WMB, in its sole and absolute discretion, and shall not have been withdrawn or rescinded. 

  
 12 

 (i) No order, injunction or decree that would prevent the consummation of the Distribution
shall be threatened, pending or issued (and still in effect) by any Governmental Authority of competent jurisdiction, no other legal restraint or prohibition preventing the consummation of the Distribution shall be in effect, and no other event
outside the control of WMB shall have occurred or failed to occur that prevents the consummation of the Distribution. 
 (j) No
other events or developments shall have occurred prior to the Distribution Date that, in the judgment of the WMB Board, would result in the Distribution having a significant adverse effect on WMB or its stockholders. 

(k) The actions set forth in Sections 3.1(c), (g), (h) and (i) shall have been completed. 

The foregoing conditions may only be waived by the WMB Board, in its sole and absolute discretion, are for the sole benefit of WMB and
shall not give rise to or create any duty on the part of the WMB Board to waive or not waive such conditions or in any way limit the right of termination of this Agreement set forth in Article VIII or alter the consequences of any such
termination from those specified in Article VIII. Any determination made by the WMB Board prior to the Distribution concerning the satisfaction or waiver of any or all of the conditions set forth in this Section 3.2 shall be conclusive.

 ARTICLE IV 
 THE DISTRIBUTION 
 Section 4.1 The Distribution. 

(a) WPX shall cooperate with WMB to accomplish the Distribution and shall, at the direction of WMB, use its reasonable best efforts to
promptly take any and all actions necessary or desirable to effect the Distribution. Each of the parties will provide, or cause the applicable member of its Group to provide, to the Agent all documents and information required to complete the
Distribution. 
 (b) Subject to the terms and conditions set forth in this Agreement, (i) on or prior to the Distribution
Date, for the benefit of and distribution to the Record Holders, WMB will deliver to the Agent all of the issued and outstanding shares of WPX Common Stock then owned by WMB or any other WMB Entity and book-entry authorizations for such shares and
(ii) on the Distribution Date, WMB shall instruct the Agent to distribute, by means of a pro rata dividend, to each Record Holder (or such Record Holder’s bank or brokerage firm on such Record Holder’s behalf) electronically,
by direct registration in book-entry form, the number of whole shares of WPX Common Stock to which such Record Holder is entitled based on the Distribution Ratio. The Distribution shall be effective at the Effective Time. On or as soon as
practicable after the Distribution Date, the Agent will mail an account statement indicating the number of shares of WPX Common Stock that have been registered in book-entry form in the name of each Record Holder. 

  
 13 

 (c) With respect to the shares of WPX Common Stock remaining with the Agent 180 days after
the Distribution Date, the Agent shall deliver any such shares as directed by WPX, with the consent of WMB (which consent shall not be unreasonably withheld or delayed). 
 Section 4.2 Fractional Shares. The Agent and WMB shall, as soon as practicable after the Distribution Date, (a) determine the number of whole shares and fractional shares of WPX Common
Stock allocable to each Record Holder, (b) aggregate all such fractional shares into whole shares and sell the whole shares obtained thereby in open market transactions at then-prevailing trading prices on behalf of Record Holders that would
otherwise be entitled to fractional share interests and (c) distribute to each such Record Holder, or for the benefit of each beneficial owner of fractional shares, such Record Holder’s or beneficial owner’s ratable share of the net
proceeds of such sales, based upon the average gross selling price per share of WPX Common Stock after making appropriate deductions for any amount required to be withheld under applicable Tax Law and less any transfer Taxes. WPX will be responsible
for payment of any brokerage fees associated with such sales. The Agent, in its sole discretion, will determine the timing and method of selling such shares, the selling price of such shares and the broker-dealer to which such shares will be sold;
provided, however, that the designated broker-dealer is not an Affiliate of WMB or WPX. Neither WMB nor WPX will pay any interest on the proceeds from the sale of such shares. 

Section 4.3 Sole Discretion of the WMB Board. The WMB Board shall, in its sole and absolute discretion, determine the
Distribution Date and all terms of the Distribution, including the form, structure and terms of any transactions and/or offerings to effect the Distribution and the timing of and conditions to the consummation thereof. In addition, and
notwithstanding anything to the contrary set forth below, the WMB Board, in its sole and absolute discretion, may at any time and from time to time until the Distribution decide to abandon the Distribution or modify or change the terms of the
Distribution, including by accelerating or delaying the timing of the consummation of all or part of the Distribution. 

ARTICLE V 

EXCHANGE OF INFORMATION; CONFIDENTIALITY 
 Section 5.1 Agreement for Exchange of Information. 
 (a) Except in the
case of an adversarial Action or threatened adversarial Action related to a request hereunder by any member of either the WMB Group or the WPX Group against any member of the other Group (which shall be governed by such discovery rules as may be
applicable thereto), and subject to Section 5.1(b), each of WMB and WPX, on behalf of the members of its respective Group, shall use reasonable best efforts to provide (except as otherwise provided in this Agreement or any Ancillary Agreement,
at the sole cost and expense of the requesting party), or cause to be provided, 

  
 14 

 
to the other Group, at any time before or after the Effective Time, as soon as reasonably practicable after written request therefor, any Information in the possession or under the control of the
members of such respective Group that the requesting party reasonably requests (i) in connection with reporting, disclosure, filing or other requirements imposed on the requesting party (including under applicable securities, defense
contracting or Tax Laws) by a Governmental Authority having jurisdiction over the requesting party, (ii) for use in any other judicial, regulatory, administrative, tax, insurance or other proceeding or in order to satisfy audit, accounting,
claims, regulatory, investigation, litigation, tax or other similar requirements, or (iii) to comply with its obligations under this Agreement, any Ancillary Agreement or the WPX Borrowing. The receiving party shall use any Information received
pursuant to this Section 5.1(a) solely to the extent reasonably necessary to satisfy the applicable obligations or requirements described in the immediately preceding sentence and shall otherwise take reasonable steps to protect such
Information. Nothing in this Section 5.1 shall be construed as obligating a party to create Information not already in its possession or control. 
 (b) In the event that any party determines that the exchange of any Information pursuant to Section 5.1(a) is reasonably likely to violate any Law or binding agreement, or waive or jeopardize any
attorney-client privilege, or attorney work product protection, such party shall not be required to provide access to or furnish such Information to the other party; provided, however, that the parties shall take all reasonable
measures to permit compliance with Section 5.1(a) in a manner that avoids any such harm or consequence. WMB and WPX intend that any provision of access to or the furnishing of Information that would otherwise be within the ambit of any legal
privilege shall not operate as a waiver of such privilege. 
 (c) After the Effective Time, each of WMB and WPX shall maintain
in effect systems and controls reasonably intended to enable the members of the other Group to satisfy their respective known reporting, accounting, disclosure, audit and other obligations. 

Section 5.2 Ownership of Information. Any Information owned by a member of one Group that is provided to a requesting party
pursuant to Section 5.1 shall be deemed to remain the property of the providing party. Except as specifically set forth herein, nothing contained in this Agreement shall be construed as granting or conferring rights of license or otherwise in
any such Information. 
 Section 5.3 Compensation for Providing Information. The party requesting Information
pursuant to Section 5.1 agrees to reimburse the party providing such Information for the reasonable costs, if any, of creating, gathering and copying such Information, to the extent that such costs are incurred for the benefit of the requesting
party. Except as may be otherwise specifically provided elsewhere in this Agreement or in any other agreement between the parties, such costs shall be computed in accordance with the providing party’s standard methodology and procedures.

  
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 Section 5.4 Record Retention. To facilitate the possible exchange of Information
pursuant to this Article V and other provisions of this Agreement from and after the Effective Time, each of the parties agrees to use reasonable best efforts to retain all Information in accordance with its record and retention policy as in effect
immediately prior to the Effective Time or as modified in good faith thereafter. 
 Section 5.5 Limitation of
Liability. No party shall have any liability to any other party in the event that any Information exchanged or provided pursuant to this Agreement that is an opinion, estimate or forecast, or that is based on an opinion, estimate or
forecast, is found to be inaccurate, in the absence of willful misconduct by the party providing such Information. No party shall have any liability to any other party if any Information is destroyed after reasonable best efforts by such party to
comply with the provisions of Section 5.4. 
 Section 5.6 Other Agreements Providing for Exchange of
Information. The rights and obligations granted under this Article V shall be subject to any specific limitations, qualifications or additional provisions on the sharing, exchange or confidential treatment of Information set forth in any
Ancillary Agreement. 
 Section 5.7 Cooperation. 

(a) From and after the Effective Time, except in the case of an adversarial Action or threatened adversarial Action by any member of
either the WMB Group or the WPX Group against any member of the other Group (which shall be governed by such discovery rules as may be applicable thereto), each party, upon reasonable written request of the other party, shall use reasonable efforts
to cooperate and consult in good faith with the other party to the extent such cooperation and consultation is reasonably necessary with respect to (i) any Action, (ii) this Agreement or any of the Ancillary Agreements or any of the
transactions contemplated hereby or thereby or (iii) any audit, investigation or any other legal requirement, and, upon reasonable written request of the other party, shall use reasonable efforts to make available to such other party the
former, current and future directors, officers, employees, other personnel and agents of the members of its respective Group (whether as witnesses or otherwise). The requesting party shall bear all costs and expenses in connection therewith.

 (b) Notwithstanding the foregoing, Section 5.7(a) shall not require a party to take any step that would significantly
interfere, or that such party reasonably determines could significantly interfere, with its business. 
 Section 5.8
Confidentiality. 
 (a) Subject to Section 5.9, each of WMB and WPX, on behalf of itself and each member of its
Group, shall hold, and shall cause its respective directors, officers, employees, agents, accountants, counsel and other advisors and representatives to hold, in strict confidence and not release or disclose, with at least the same degree of care,
but no less than a reasonable degree of care, that it applies to its own business sensitive and proprietary information, all Information concerning the other Group or its business that is either in its possession (including Information in its
possession prior to the Distribution) or furnished by any member of such other Group or its respective directors, officers, 

  
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employees, agents, accountants, counsel and other advisors and representatives at any time pursuant to this Agreement, any Ancillary Agreement or otherwise, and shall not use any such Information
other than for such purposes as shall be expressly permitted hereunder or thereunder, except, in each case, to the extent that such Information is (i) in the public domain through no fault of such party or any member of such Group or any of
their respective directors, officers, employees, agents, accountants, counsel and other advisors and representatives, (ii) later lawfully acquired from other sources by such party (or any member of such party’s Group), which sources are
not themselves bound by a confidentiality obligation, or (iii) independently generated without reference to any proprietary or confidential Information of the disclosing party or its Group. 

(b) No receiving party shall release or disclose, or permit to be released or disclosed, any such Information concerning the other Group
to any other Person, except its directors, officers, employees, agents, accountants, counsel and other advisors and representatives who need to know such Information (who shall be advised of their obligations hereunder with respect to such
Information), except in compliance with Section 5.9. Without limiting the foregoing, when any Information concerning the other Group or its business is no longer needed for the purposes contemplated by this Agreement or any Ancillary Agreement,
each disclosing party will, promptly after the request of the receiving party, either return to the disclosing party all Information in a tangible form (including all copies thereof and all notes, extracts or summaries based thereon) or certify to
the disclosing party that it has destroyed such Information (and such copies thereof and such notes, extracts or summaries based thereon). 
 Section 5.9 Protective Arrangements. In the event that any party or any member of its Group either determines on the advice of its counsel that it should disclose any Information pursuant to
applicable Law or receives any demand under lawful process or from any Governmental Authority or properly constituted arbitral authority to disclose or provide Information of any other party (or any member of any other party’s Group) that is
subject to the confidentiality provisions hereof, the Person required to disclose the Information shall give the applicable Person prompt, and to the extent reasonably practicable, prior written notice of such disclosure and an opportunity to
contest such disclosure, and shall use reasonable best efforts to cooperate, at the expense of the requesting Person, in seeking any reasonable protective arrangements requested by such Person. In the event that such appropriate protective
arrangement or order or other remedy is not obtained, the Person that is required to disclose such Information shall furnish, or cause to be furnished, only that portion of such Information that is legally required to be disclosed and shall use
reasonable best efforts to ensure that confidential treatment is accorded such Information. This Section 5.9 shall not apply to the disclosure of any Information to any Governmental Authority that is reasonably necessary to respond to any
inquiry by any Governmental Authority. 

  
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 ARTICLE VI 
 ADDITIONAL COVENANTS AND OTHER MATTERS 
 Section 6.1 Further
Assurances. 
 (a) In addition to the actions specifically provided for elsewhere in this Agreement, each of the parties
shall use its reasonable best efforts, prior to, on and after the Effective Time, to take, or cause to be taken, all actions, and to do, or cause to be done, all things, reasonably necessary, proper or advisable under applicable Law, regulations and
agreements to consummate and make effective the transactions contemplated by this Agreement and the Ancillary Agreements. 
 (b)
On or prior to the Effective Time, WMB and WPX in their respective capacities as direct and indirect stockholders of their respective Subsidiaries, shall each ratify any actions that are reasonably necessary or desirable to be taken by WMB and WPX
or any other Subsidiary of WMB or WPX, as the case may be, to effectuate the transactions contemplated by this Agreement. 

Section 6.2 Use of Names, Logos and Information. 
 (a) No later than the Distribution Date, WPX shall cause to be filed with the Secretary of State (or other appropriate Governmental Authority) of the states in which its Subsidiaries are located or are
doing business, an amendment to their certificates of incorporation or similar governing documents or qualification to do business to change the name of any Subsidiary with “Williams” in its name to a new name not confusingly similar to
WMB’s name. 
 (b) No later than the Distribution Date (or, with respect to any WPX Entity’s wells, tanks, pipelines,
and other field facilities, no later than the date that is six months after the Distribution Date), WPX shall use reasonable best efforts to remove, and WPX shall cause each member of the WPX Group to remove, from their websites, and any other
publicly distributed material (other than material required to be submitted for the purpose of regulatory filings and other similar documentation), any reference to WMB, and its business lines and plans and any names, logos, or trademarks associated
therewith. WPX and each other member of the WPX Group shall cease all use of the WMB name (and any name confusingly similar thereto) and all trademarks and service marks associated therewith no later than the Distribution Date (or, with respect to
any WPX Entity’s wells, tanks, pipelines, and other field facilities, no later than the date that is six months after the Distribution Date); provided that, if any member of the WPX Group is unable to comply with the foregoing
requirements of this Section 6.2(b) for reasons outside of its reasonable control, WPX may request WMB to grant an extension of time beyond the Distribution Date, and WMB agrees not to unreasonably withhold or delay the granting of any such
requested extension. Nothing in this Section 6.2(b) shall preclude WPX or its Subsidiaries from using the WMB name to indicate that WPX and members of the WPX Group were formerly associated with WMB, or from referring to WMB by its name for
non-trademark and non-branding purposes as is permitted by applicable Law. 

  
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 (c) WPX shall not, and shall cause each member of the WPX Group not to, take any action,
purport to take any action or otherwise hold itself out as having any authority to act on behalf of or represent in any way any member of the WMB Group. WPX shall indemnify, defend and hold harmless each of the WMB Indemnitees from and against any
and all Liabilities of the WMB Indemnitees relating to, arising out of or resulting from a breach of this Section 6.2(c). 

Section 6.3 Non-Solicitation. 
 (a) Without the prior consent of WMB, during the term of the Transition Services Agreement and for a period of one year thereafter, WPX will not (and will cause each other WPX Entity not to) solicit for
employment, directly or indirectly, any employee or contractor (including any contractor employed by a third party) of the WMB Entities that (i) is providing services to any WMB Entity or WPX Entity in connection with this Agreement or any
Ancillary Agreement, or (ii) with whom any WPX Entity has, or will have, more than incidental contact pursuant to this Agreement or any Ancillary Agreement. 
 (b) Without the prior consent of WPX, during the term of the Transition Services Agreement and for a period of one year thereafter, WMB will not (and will cause each other WMB Entity not to) solicit for
employment, directly or indirectly, any employee of WPX involved in the performance of WPX obligations under this Agreement or any Ancillary Agreement. 
 (c) With respect to each of Sections 6.3(a) and 6.3(b) above, the prohibition on solicitation shall extend 90 days after the termination of any employee’s employment or, in the case of WMB employees,
90 days after the cessation of such employee’s involvement in the performance of all “Services” (as defined under the Transition Services Agreement). This provision shall not operate or be construed to prevent or limit any
employee’s right to practice his or her profession or to utilize his or her skills for another employer or to restrict any employee’s freedom of movement or association. 

(d) Neither the publication of classified advertisements in newspapers, periodicals, Internet bulletin boards, or other publications of
general availability or circulation, nor the consideration and hiring of persons responding to such advertisements, shall be deemed a breach of this Section 6.3, unless the advertisement and solicitation is undertaken as a means to circumvent
or conceal a violation of this provision and/or the hiring party acts with knowledge of this hiring prohibition. 
 (e) Each of
the parties (i) acknowledges and agrees that money damages would not be a sufficient remedy for any breach of this Section 6.3 by such party (or any other member of such party’s Group), (ii) consents to a court of competent
jurisdiction entering an order finding that the non-breaching party has been irreparably harmed as a result of any such breach and (iii) consents to the granting of injunctive relief without proof of actual damages as a remedy for any such
breach. Such remedies shall not be deemed to be the exclusive remedies for a breach of this Section 6.3 but shall be in addition to all other remedies available at law or equity to the non-breaching party. 

  
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 Section 6.4 Information Technology Transition Costs. Notwithstanding anything to
the contrary in this Agreement, upon the completion of the Distribution WMB shall promptly contribute to WPX $20.1 million for certain information technology transition costs expected to be incurred by the WPX Entities in connection with the
Distribution, less any amounts funded by WMB for such costs prior to the completion of the Distribution. 
 ARTICLE VII

 MUTUAL RELEASES; INDEMNIFICATION 
 Section 7.1 Mutual Releases. 
 (a) Except (i) as provided in
Section 7.1(c), (ii) as may be otherwise provided in this Agreement or any Ancillary Agreement and (iii) for any matter for which any WPX Indemnitee is entitled to indemnification pursuant to this Article VIII, effective as of
the Effective Time, WPX does hereby, for itself and each other WPX Entity and their respective Affiliates, predecessors, successors and assigns, and, to the extent WPX legally may, all Persons that at any time prior or subsequent to the Effective
Time have been stockholders, directors, officers, members, agents or employees of WPX or any other WPX Entity (in each case, in their respective capacities as such), remise, release and forever discharge each WMB Entity, their respective Affiliates,
successors and assigns, and all Persons that at any time prior to the Effective Time have been stockholders, directors, officers, members, agents or employees of WMB or any other WMB Entity (in each case, in their respective capacities as such), and
their respective heirs, executors, administrators, successors and assigns, from any and all Liabilities whatsoever, whether at law or in equity, whether arising under any contract or agreement, by operation of law or otherwise, existing or arising
from or relating to any acts or events occurring or failing to occur or alleged to have occurred or to have failed to occur or any conditions existing or alleged to have existed on or before the Effective Time, whether or not known as of the
Effective Time. 
 (b) Except (i) as provided in Section 7.1(c), (ii) as may be otherwise provided in this
Agreement or any Ancillary Agreement and (iii) for any matter for which any WMB Indemnitee is entitled to indemnification pursuant to this Article VIII, WMB does hereby, for itself and each other WMB Entity and their respective Affiliates,
successors and assigns, and, to the extent WMB legally may, all Persons that at any time prior to the Effective Time have been stockholders, directors, officers, members, agents or employees of WMB or any other WMB Entity (in each case, in their
respective capacities as such), remise, release and forever discharge each WPX Entity, their respective Affiliates, successors and assigns, and all Persons that at any time prior to the Effective Time have been stockholders, directors, officers,
members, agents or employees of WPX or any other WPX Entity (in each case, in their respective capacities as such), and their respective heirs, executors, administrators, successors and assigns, from any and all Liabilities whatsoever, whether at
law or in equity, whether arising under any contract or 

  
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agreement, by operation of law or otherwise, existing or arising from any acts or events occurring or failing to occur or alleged to have occurred or to have failed to occur or any conditions
existing or alleged to have existed on or before the Effective Time, whether or not known as of the Effective Time. 
 (c)
Nothing contained in Section 7.1(a) or 7.1(b) shall impair any right of any Person to enforce this Agreement, any Ancillary Agreement, including the applicable Schedules hereto and thereto, or any arrangement that is not to terminate as of the
Effective Time, as specified in Section 2.5(b). Nothing contained in Section 7.1(a) or 7.1(b) shall release any Person from: 
 (i) any Liability provided in or resulting from any agreement among any WMB Entities and any WPX Entities that is not to terminate as of the Effective Time, as specified in Section 2.5(b), or any
other Liability that is not to terminate as of the Effective Time, as specified in Section 2.5(b); 
 (ii) any Liability,
contingent or otherwise, assumed, transferred, assigned or allocated to the Group of which such Person is a member in accordance with, or any other Liability of any member of any Group under, this Agreement or any Ancillary Agreement; or 

(iii) any Liability the release of which would result in the release of any Person other than a Person released pursuant to this
Section 7.1; provided that the parties agree not to bring suit or permit any of their Subsidiaries to bring suit against any Person with respect to any Liability to the extent that such Person would be released with respect to such
Liability by this Section 7.1 but for the provisions of this clause (iii). 
 (d) WPX shall not make, and shall not permit
any other WPX Entity to make, any claim or demand, or commence any Action asserting any claim or demand, including any claim for indemnification, against any WMB Entity, or any other Person released pursuant to Section 7.1(a), with respect to
any Liabilities released pursuant to Section 7.1(a). WMB shall not, and shall not permit any other WMB Entity, to make any claim or demand, or commence any Action asserting any claim or demand, including any claim for indemnification, against
any WPX Entity, or any other Person released pursuant to Section 7.1(b), with respect to any Liabilities released pursuant to Section 7.1(b). 
 (e) At any time, at the request of any other party, each party shall cause each member of its respective Group to execute and deliver releases in form reasonably satisfactory to the other party reflecting
the provisions of this Section 7.1. 
 Section 7.2 Indemnification by WPX. Subject to Section 7.4, WPX
shall, and shall cause each of its Subsidiaries that is in the WPX Group as of the Effective Time to, jointly and severally indemnify, defend and hold harmless WMB, each WMB Entity and each of their respective current, former and future directors,
officers and employees, and each of the heirs, executors, successors and assigns of any of the foregoing (collectively, the “WMB Indemnitees”), from and against any and all Liabilities of the WMB 

Indemnitees relating to, arising out of or resulting from any of the following items (without duplication): 

  
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 (a) any WPX Liability, including the failure of WPX or any other member of the WPX Group or
any other Person to pay, perform or otherwise promptly discharge any WPX Liabilities in accordance with their respective terms, whether prior to, on or after the Effective Time; 

(b) the WPX Business; 
 (c) any breach by any WPX Entity of this Agreement or any of the Ancillary Agreements; and 
 (d) any untrue statement or alleged untrue statement of a material fact or omission or alleged omission to state a material fact required to be stated therein or necessary to make the statements therein
not misleading, with respect to all information contained in the Form 10 or the Information Statement; provided, however, that the indemnity provided in this Section 7.2(d) shall not apply to any WMB Indemnitee with respect to any
Liability to the extent arising out of any untrue statement or omission or alleged untrue statement or omission contained in any information furnished in writing to WPX by WMB expressly for use in such filing. 

Notwithstanding the foregoing, no WMB Indemnitee shall be entitled to indemnification under this Section 7.2 for any Liability for which any WPX
Indemnitee is entitled to be indemnified pursuant to Sections 7.3(d) and 7.3(e) below. 
 Section 7.3 Indemnification by
WMB. Subject to Section 7.4, WMB shall, and shall cause each of its Subsidiaries that is in the WMB Group as of the Effective Time to, jointly and severally indemnify, defend and hold harmless WPX, each WPX Entity and each of their
respective current, former and future directors, officers and employees, and each of the heirs, executors, successors and assigns of any of the foregoing (collectively, the “WPX Indemnitees”), from and against any and all
Liabilities of the WPX Indemnitees relating to, arising out of or resulting from any of the following items (without duplication): 
 (a) any WMB Liability, including the failure of WMB or any other member of the WMB Group or any other Person to pay, perform or otherwise promptly discharge any WMB Liabilities in accordance with their
respective terms, whether prior to, on or after the Effective Time; 
 (b) the WMB Business; 

(c) any breach by any WMB Entity of this Agreement or any of the Ancillary Agreements; and 

(d) any cash payment determined to be owed by any WPX Entity in any of the pending proceedings set forth on Schedule 7.3(d)
related to power marketing in California; provided, that WPX shall pay, or cause to be paid, to WMB any cash that a WPX Entity receives, or is entitled to receive, in connection with such proceedings, regardless of whether such amount exceeds
any amount due from WMB to WPX pursuant to this clause; and 

  
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 (e) the pending proceedings set forth on Schedule 7.3(e) related to published gas
price indices, including, solely for purposes of this Section 7.3(e), any Liability for indirect, punitive or consequential damages relating to such proceeding; provided, that if all or any portion of the indemnification obligation set
forth in this Section 7.3(e) is held to be invalid, illegal or unenforceable in any respect under any applicable Law or rule in any jurisdiction, then the parties will, to the extent permitted by law, take such actions as may reasonably be
necessary in order to place the WPX Entities in the same position as if such obligation were fully valid, legal and enforceable. 

Notwithstanding the foregoing, no WPX Indemnitee shall be entitled to indemnification under this Section 7.3 for any Liability to the extent arising
out of any of the Contracts set forth on Schedule 7.3. 
 Section 7.4 Indemnification Obligations Net of
Insurance Proceeds and Other Amounts. 
 (a) The parties intend that any Liability subject to indemnification or
reimbursement pursuant to this Agreement will be net of Insurance Proceeds and other amounts received that actually reduce the amount of the Liability for which indemnification is sought. Accordingly, the amount which any party (an
“Indemnifying Party”) is required to pay to any Person entitled to indemnification or reimbursement under this Agreement (an “Indemnitee”) will be reduced by any Insurance Proceeds and other amounts theretofore
actually recovered by or on behalf of the Indemnitee in reduction of the related Liability. If an Indemnitee receives a payment (an “Indemnity Payment”) required by this Agreement from an Indemnifying Party in respect of any
Liability and subsequently receives Insurance Proceeds or other amounts therefor, then the Indemnitee will promptly pay to the Indemnifying Party an amount equal to the excess of the Indemnity Payment received over the amount of the Indemnity
Payment that would have been due if the Insurance Proceeds or other amounts had been received, realized or recovered before the Indemnity Payment was made. 
 (b) An insurer that would otherwise be obligated to defend or make payment in response to any claim shall not be relieved of the responsibility with respect thereto or, solely by virtue of the
indemnification provisions hereof, have any subrogation rights with respect thereto, it being expressly understood and agreed that no insurer or any other third party shall be entitled to a “windfall” (i.e., a benefit it would not be
entitled to receive in the absence of the indemnification provisions of this Agreement) by virtue of the indemnification provisions hereof. For the avoidance of doubt, in no event shall any party be obligated to seek recovery from any insurer as a
condition to obtaining the benefit of the indemnification provisions of this Agreement or any Ancillary Agreement. 
 (c) If an
indemnification claim is covered by the indemnification provisions of an Ancillary Agreement, the claim shall be made under the Ancillary Agreement to the extent applicable and the provisions thereof shall govern such claim. In no event shall any
party be entitled to double recovery from the indemnification provisions of this Agreement and any Ancillary Agreement. 

  
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 (d) Payments and reimbursements with respect to Tax-related Liabilities and Tax-related
indemnities are governed exclusively by the Tax Sharing Agreement. To the extent of any inconsistency or conflict between this Agreement and the Tax Sharing Agreement with respect to any matter relating to WMB’s and WPX’s respective
rights, responsibilities and obligations after the Distribution with respect to Taxes, the provisions of the Tax Sharing Agreement shall apply. 
 Section 7.5 Third-Party Claims. 
 (a) If an Indemnitee shall receive
notice or otherwise learn of the assertion by a Person (including any Governmental Authority) that is not a WMB Entity or a WPX Entity of any claim (including environmental claims and demands or requests for investigation or remediation of
contamination) or of the commencement by any such Person of any Action with respect to which an Indemnifying Party may be obligated to provide indemnification to such Indemnitee pursuant to this Agreement or any Ancillary Agreement (collectively, a
“Third-Party Claim”), such Indemnitee shall give such Indemnifying Party written notice thereof as soon as promptly practicable, but no later than 30 days after becoming aware of such Third-Party Claim. Any such notice shall
describe the Third-Party Claim in reasonable detail and contain written correspondence received from the third party that relates to the Third-Party Claim. Notwithstanding the foregoing, the failure of any Indemnitee to give notice as provided in
this Section 7.5(a) shall not relieve the related Indemnifying Party of its obligations under this Article VII, except to the extent that such Indemnifying Party is prejudiced by such failure to give notice. 

(b) With respect to any Third-Party Claim: 
 (i) Unless the parties otherwise agree, within 30 days after the receipt of notice from an Indemnitee in accordance with Section 7.5(a), an Indemnifying Party shall defend (and, unless the
Indemnifying Party has specified any reservations or exceptions, seek to settle or compromise), at such Indemnifying Party’s own cost and expense and by such Indemnifying Party’s own counsel, any Third-Party Claim. The applicable
Indemnitee shall have the right to employ separate counsel and to participate in (but not control) the defense, compromise, or settlement thereof, but the fees and expenses of such counsel shall be the expense of such Indemnitee. Notwithstanding the
foregoing, the Indemnifying Party shall be liable for the fees and expenses of counsel employed by the Indemnitee (A) for any period during which the Indemnifying Party has not assumed the defense of such Third-Party Claim (other than during
any period in which the Indemnitee shall have failed to give notice of the Third-Party Claim in accordance with Section 7.5(a)) or (B) to the extent that such engagement of counsel is as a result of a conflict of interest, as reasonably
determined by the Indemnitee acting in good faith. 

  
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 (ii) No Indemnifying Party shall consent to entry of any judgment or enter into any
settlement of any Third-Party Claim without the consent of the applicable Indemnitee; provided, however, that such Indemnitee shall be required to consent to such entry of judgment or to such settlement that the Indemnifying Party may
recommend if the judgment or settlement (A) contains no finding or admission of any violation of Law or any violation of the rights of any Person, (B) involves only monetary relief which the Indemnifying Party has agreed to pay and could
not reasonably be expected to have a significant adverse impact (financial or non-financial) on the Indemnitee, including a significant adverse impact on the rights, obligations, operations, standing or reputation of the Indemnitee (or any of its
Subsidiaries or Affiliates), and (C) includes a full and unconditional release of the Indemnitee. Notwithstanding the foregoing, in no event shall an Indemnitee be required to consent to any entry of judgment or settlement if the effect thereof
is to permit any injunction, declaratory judgment, other order or other nonmonetary relief to be entered, directly or indirectly, against any Indemnitee. 
 (c) Whether or not the Indemnifying Party assumes the defense of a Third-Party Claim, no Indemnitee shall admit any liability with respect to, or settle, compromise or discharge, such Third-Party Claim
without the Indemnifying Party’s prior written consent, which consent shall not be unreasonably withheld or delayed. 

Section 7.6 Additional Matters. 
 (a) Any claim on account of a Liability that does not result from a Third-Party Claim shall be timely asserted by written notice given by the Indemnitee to the related Indemnifying Party. Such
Indemnifying Party shall have a period of 30 days after the receipt of such notice within which to respond thereto. If such Indemnifying Party does not respond within such 30-day period, such Indemnifying Party shall be deemed to have refused to
accept responsibility to make payment. If such Indemnifying Party does not respond within such 30-day period or rejects such claim in whole or in part, such Indemnitee shall be free to pursue remedies as specified by this Agreement and the Ancillary
Agreements. 
 (b) In the event of payment by or on behalf of any Indemnifying Party to any Indemnitee in connection with any
Third-Party Claim, such Indemnifying Party shall be subrogated to and shall stand in the place of such Indemnitee as to any events or circumstances in respect of which such Indemnitee may have any right, defense or claim relating to such Third-Party
Claim against any claimant or plaintiff asserting such Third-Party Claim or against any other Person. Such Indemnitee shall cooperate with such Indemnifying Party in a reasonable manner, and at the cost and expense of such Indemnifying Party, in
prosecuting any subrogated right, defense or claim. 
 (c) In the event of an Action in which the Indemnifying Party is not a
named defendant, if either the Indemnitee or the Indemnifying Party shall so request, the parties shall endeavor to substitute the Indemnifying Party for the named defendant, if reasonably practicable. If such substitution or addition cannot be
achieved or is not requested, the named defendant shall allow the Indemnifying Party to manage the Action as set forth in this Agreement and the Indemnifying Party shall fully indemnify the named defendant against all costs of defending the Action
(including court costs, sanctions imposed by a court, attorneys’ fees, experts’ fees and all other external expenses, and the allocated costs of in-house counsel and other personnel), the costs of any judgment or settlement, and the cost
of any interest or penalties relating to any judgment or settlement. 

  
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 Section 7.7 Remedies Cumulative . The remedies provided in this
Article VII shall be cumulative and shall not preclude assertion by any Indemnitee of any other rights or the seeking of any and all other remedies against any Indemnifying Party. 

Section 7.8 Survival of Indemnities . The rights and obligations of each of WMB and WPX and their respective
Indemnitees under this Article VII shall survive the sale or other transfer by any party of any assets or businesses or the assignment by it of any Liabilities. 
 Section 7.9 Limitation on Liability. Except as may expressly be set forth in this Agreement, none of WMB, WPX, or any other member of either Group shall in any event have any Liability to the
other or to any other member of the other’s Group, or to any other WMB Indemnitee or WPX Indemnitee, as applicable, under this Agreement (a) to the extent that any such Liability resulted from any willful violation of Law or fraud by the
party seeking indemnification or (b) subject to Section 7.3(e), for any indirect, punitive or consequential damages. Notwithstanding the foregoing, the provisions of this Section 7.9 shall not limit an Indemnifying Party’s
indemnification obligations with respect to any Liability that any Indemnitee may have to any third party not affiliated with any member of the WMB Group or the WPX Group. 
 ARTICLE VIII 
 TERMINATION 

Section 8.1 Termination. This Agreement and any Ancillary Agreement may be terminated at any time prior to the Distribution
in the sole discretion of WMB without the approval of WPX. The obligations of the parties under Article III (including the obligation to pursue or effect the Distribution) may be terminated by WMB if any time after the Distribution it determines, in
its sole and absolute discretion, that the Distribution would not be in the best interests of WMB or its stockholders. 

Section 8.2 Effect of Termination. In the event of any termination of this Agreement prior to the Distribution, no party (or
any of its directors or officers) shall have any Liability or further obligation to any other party with respect to this Agreement. 
 ARTICLE IX 
 DISPUTE RESOLUTION 

Section 9.1 Disputes. Except as otherwise specifically provided in any Ancillary Agreement, the procedures for discussion,
negotiation and mediation set forth in this Article IX shall apply to all disputes, controversies or claims (whether arising in contract, tort or otherwise) that may arise out of or relate to, or arise under or in connection with this Agreement or
any Ancillary Agreement, or the transactions contemplated hereby or thereby (including all actions taken in furtherance of the transactions contemplated hereby or thereby on or prior to the Effective Time), or the commercial or economic relationship
of the parties relating hereto or thereto, between or among any Person in the WMB Group and the WPX Group. 

  
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 Section 9.2 Escalation; Mediation. 

(a) It is the intent of the parties to use their respective commercially reasonable efforts to resolve expeditiously any dispute,
controversy or claim between or among them with respect to the matters covered hereby that may arise from time to time on a mutually acceptable negotiated basis. In furtherance of the foregoing, upon the written notice of either party, each party
shall appoint a representative at an authority level above the level of the individuals who have been unable to resolve the dispute (the “Next Step Up Representatives”). The Next Step Up Representatives shall be appointed as
determined in the discretion of each party considering the importance of the relationship, the complexity of the issues, and the size of the amounts in dispute. The parties shall allow for a period of 15 Business Days after the last representative
is appointed and contact information provided to the other party for the Next Step Up Representatives to negotiate a resolution of the dispute before the parties are required to move to the mediation stage. This 15 Business Day period may be waived
jointly in writing. 
 (b) If the parties are not able to resolve the dispute, controversy or claim (except those relating to
Environmental Liabilities, which are addressed in Section 9.2(c) below) through the escalation process referred to above, then either party may submit the dispute to mediation by written notice to the other party. The parties shall jointly
retain a mediator to aid the parties in their discussions and negotiations by informally providing advice to the parties. The mediator shall be selected by the parties. If the parties cannot agree on a mediator within 30 days after the notice to
mediate, the International Institute for Conflict Prevention and Resolution (“CPR”) shall designate a mediator at the request of either party. Any mediator proposed by CPR must be reasonably acceptable to both parties. Any opinion
expressed by the mediator shall be strictly advisory and shall not be binding on the parties, nor shall any opinion expressed by the mediator be admissible in any other proceeding. Costs of the mediation shall be borne equally by the parties
involved in the matter, except that each party shall be responsible for its own expenses. Mediation shall be a prerequisite to the commencement of any Proceeding (except those relating to Environmental Liabilities, which are addressed in
Section 9.2(c) below) by either party. 
 (c) If the parties are not able to resolve any technical or factual dispute,
controversy or claim relating to Environmental Liabilities through the escalation process referred to above, then either party may submit the dispute to mediation by written notice to the other party. The parties shall jointly retain a technical
mediator, such as a third-party environmental consultant or other person with specific technical expertise in the matter involved in the dispute, controversy or claim to aid the parties in their discussions and negotiations. The technical mediator
shall be selected by the parties. If the parties cannot agree on a technical mediator within 30 days after the notice to mediate, CPR shall designate a technical mediator at the request of either party. Any technical mediator proposed by CPR must be
reasonably acceptable to both parties. The technical mediator shall provide informal advice to the parties and, if requested by both parties, shall also 

  
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provide a written opinion letter or report summarizing the matter in dispute, identifying any significant assumptions or informational gaps underlying that summary, and setting forth the
conclusions and recommendations of the technical mediator. Unless mutually agreed by the parties in writing, any opinion expressed by the technical mediator shall be strictly advisory and shall not be binding on the parties, nor shall any opinion
expressed or delivered by the technical mediator be admissible in any other proceeding. Costs related to the technical mediator’s work, including any investigation, data-gathering or sampling recommended by the technical mediator, shall be
borne equally by the parties involved in the matter, except that each party shall be responsible for its own expenses. Technical mediation shall be a prerequisite to the commencement of any Proceeding relating to Environmental Liabilities by either
party. 
 (d) For purposes of this Section 9.2: 
 (i) “Environmental Laws” means all federal, state, local and foreign Laws, including all judicial and administrative orders, determinations, and consent agreements or decrees, that
relate, in whole or in part, to Hazardous Substances, pollution, contaminants, harmful substances, protection of the environment or human health, including those that regulate the use, manufacture, generation, handling, labeling, testing, transport,
treatment, storage, processing, discharge, disposal, release, threatened release, control, or cleanup of harmful substances, pollutants, contaminants, Hazardous Substances or materials containing such substances, regardless of when enacted or
effective; 
 (ii) “Environmental Liabilities” means any Liabilities arising out of or relating to the
environment, human health, any Environmental Law, Hazardous Substances or exposure to Hazardous Substances, pollutants, contaminants or other harmful substances, including (A) fines, penalties, judgments, awards, settlements, losses, damages
(including consequential damages), costs, fees (including attorneys’ and consultants’ fees), expenses and disbursements, (B) costs of defense and other responses to any administrative or judicial action (including notices, claims,
complaints, suits and other assertions of liability), (C) responsibility for any investigation, remediation, monitoring or cleanup costs, injunctive relief, tort claims, natural resource damages, and any other environmental compliance or
remedial measures, in each case known or unknown, foreseen or unforeseen, and (D) any claims, suits or actions (whether third-party or otherwise) for any Liability, including personal injury or property damage; and 

(iii) “Hazardous Substances” means all materials, wastes or substances defined by, or regulated under, any
Environmental Laws now or in the future and any substance that can give rise to any claim, suit or action (whether third-party or otherwise) for any Liabilities, including personal injury or property damage. 

Section 9.3 Court Actions. 
 (a) In the event that any party, after complying with the provisions set forth in Section 9.2 above, desires to commence an Action, such party, subject to Section 10.11, may submit the dispute,
controversy or claim (or such series of related disputes, controversies or claims) to any court of competent jurisdiction. 

  
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 (b) Unless otherwise agreed in writing, the parties will continue to provide service and
honor all other commitments under this Agreement and the Ancillary Agreements during the course of dispute resolution pursuant to the provisions of this Article IX, except to the extent such commitments are the subject of such dispute, controversy
or claim. 
 ARTICLE X 
 MISCELLANEOUS 
 Section 10.1 Corporate Power. WMB represents on
behalf of itself and each other WMB Entity, and WPX represents on behalf of itself and each other WPX Entity, that: 
 (a) each
such Person is a corporation or other entity duly incorporated or formed, validly existing and in good standing under the Laws of the state or other jurisdiction of its incorporation or formation, and has all material corporate or other similar
powers required to carry on its business as currently conducted; 
 (b) each such Person has the requisite corporate or other
power and authority and has taken all corporate or other action necessary in order to execute, deliver and perform this Agreement and each other Ancillary Agreement to which it is a party and to consummate the transactions contemplated hereby and
thereby; and 
 (c) this Agreement and each Ancillary Agreement to which it is a party has been duly executed and delivered by
it and constitutes a valid and binding agreement of such Person enforceable in accordance with the terms hereof and thereof. 

Section 10.2 Coordination with Certain Ancillary Agreements; Conflicts. In the event of any conflict or inconsistency between
any provision of any of the Ancillary Agreements and any provision of this Agreement, the applicable Ancillary Agreement shall control over the inconsistent provisions of this Agreement as to the matters specifically addressed in such Ancillary
Agreement. 
 Section 10.3 Expenses. Except as expressly set forth in this Agreement or in any Ancillary Agreement,
all fees, costs and expenses paid or incurred in connection with the Separation and the performance of this Agreement and any Ancillary Agreement, whether performed by a third-party or internally, will be paid by the party incurring such fees or
expenses, whether or not the Separation is consummated, or as otherwise agreed by the parties. 
 Section 10.4 Amendment
and Modification. This Agreement and the Ancillary Agreements may not be amended, modified or supplemented in any manner, whether by course of conduct or otherwise, except by an instrument in writing specifically designated as an
amendment hereto, signed on behalf of each party. 
 Section 10.5 Waiver. No failure or delay of any party in
exercising any right or remedy hereunder shall operate as a waiver thereof, nor shall any single or partial exercise of any such right or power, or any abandonment or discontinuance of steps to enforce such 

  
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right or power, or any course of conduct, preclude any other or further exercise thereof or the exercise of any other right or power. The rights and remedies of the parties hereunder are
cumulative and are not exclusive of any rights or remedies that they would otherwise have hereunder. Any agreement on the part of any party to any such waiver shall be valid only if set forth in a written instrument executed and delivered by a duly
authorized officer on behalf of such party. 
 Section 10.6 Notices. All notices and other communications hereunder
shall be in writing and shall be deemed duly given (a) on the date of delivery if delivered personally, or if by facsimile, upon written confirmation of receipt by facsimile, e-mail or otherwise, (b) on the first Business Day following the
date of dispatch if delivered utilizing a next-day service by a recognized next-day courier or (c) on the earlier of confirmed receipt or the fifth Business Day following the date of mailing if delivered by registered or certified mail, return
receipt requested, postage prepaid. All notices hereunder shall be delivered to the addresses set forth below, or pursuant to such other instructions as may be designated in writing by the party to receive such notice: 

 

	 	(i)	if to WMB or any other WMB Entity, to: 

 The Williams Companies, Inc. 
 One Williams Center 

Tulsa, Oklahoma 74172-0172 
 Attention: General Counsel 
 Facsimile: 918-573-1807 

E-mail: craig.rainey@williams.com 
  

	 	(ii)	if to WPX or any other WPX Entity, to: 

 WPX Energy, Inc. 
 One Williams Center 

Tulsa, Oklahoma 74172-0172 
 Attention: General Counsel 
 Facsimile: 918-573-5942 

E-mail: james.bender@williams.com 
 Section 10.7 Interpretation. When a reference is made in this Agreement to a Section, Article, or Exhibit such reference shall be to a Section, Article, or Exhibit of this Agreement unless
otherwise indicated. The table of contents and headings contained in this Agreement or in any Exhibit are for convenience of reference purposes only and shall not affect in any way the meaning or interpretation of this Agreement. All words used in
this Agreement will be construed to be of such gender or number as the circumstances require. Any capitalized terms used in any Schedule or Exhibit but not otherwise defined therein shall have the meaning as defined in this Agreement. All Schedules
and Exhibits annexed hereto or referred to herein are hereby incorporated in and made a part of this Agreement as if set forth herein. The word “including” and words of similar import when used in this Agreement shall mean “including,
without limitation,” unless otherwise specified. The word “day” when used in this Agreement shall mean “calendar day,” unless otherwise specified. 

  
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 Section 10.8 Entire Agreement. This Agreement and the Ancillary Agreements and
the Exhibits, Schedules and Appendices hereto and thereto constitute the entire agreement, and supersede all prior written agreements, arrangements, communications and understandings and all prior and contemporaneous oral agreements, arrangements,
communications and understandings among the parties with respect to the subject matter hereof. None of this Agreement or any of the Ancillary Agreements shall be deemed to contain or imply any restriction, covenant, representation, warranty,
agreement or undertaking of any party with respect to the transactions contemplated hereby and thereby other than those expressly set forth herein or therein or in any document required to be delivered hereunder or thereunder. Notwithstanding any
oral agreement or course of action of the parties or their representatives to the contrary, no party to this Agreement shall be under any legal obligation to enter into or complete the transactions contemplated hereby unless and until this Agreement
shall have been executed and delivered by each of the parties. 
 Section 10.9 No Third Party Beneficiaries. Except
for the indemnification rights under this Agreement of any WMB Indemnitee or WPX Indemnitee in their respective capacities as such, nothing in this Agreement or the Ancillary Agreements, express or implied, is intended to or shall confer upon any
Person other than the parties and their respective successors and permitted assigns any legal or equitable right, benefit or remedy of any nature under or by reason of this Agreement or the Ancillary Agreements. 

Section 10.10 Governing Law. This Agreement and all disputes or controversies arising out of or relating to this Agreement or
the transactions contemplated hereby shall be governed by, and construed in accordance with, the internal Laws of the State of Oklahoma, without regard to the Laws of any other jurisdiction that might be applied because of the conflicts of laws
principles of the State of Oklahoma. 
 Section 10.11 Submission to Jurisdiction. Except as otherwise specifically
provided in any Ancillary Agreement, with respect to any suit, action or proceeding relating to this Agreement or any Ancillary Agreement (a “Proceeding”), each party to this Agreement irrevocably (a) consents and submits to
the exclusive jurisdiction of the state and federal courts located in Tulsa County, Oklahoma; (b) waives any objection which such party may have at any time to the laying of venue of any Proceeding brought in any such court, waives any claim
that such Proceeding has been brought in an inconvenient forum and further waives the right to object, with respect to such Proceeding, that such court does not have jurisdiction over such party; and (c) consents to the service of process at
the address set forth for notices in Section 10.6; provided, however, that such manner of service of process shall not preclude the service of process in any other manner permitted under applicable law. 

Section 10.12 Assignment. Except as specifically provided in any Ancillary Agreement, none of this Agreement, any of the
Ancillary Agreements, or any of the rights, interests or obligations hereunder or thereunder may be assigned or delegated, in whole or 

  
 31 

 
in part, by operation of law or otherwise, by any party without the prior written consent of the other parties, and any such assignment without such prior written consent shall be null and void.
If any party (or any of its successors or permitted assigns) (a) shall consolidate with or merge into any other Person and shall not be the continuing or surviving corporation or entity of such consolidation or merger or (b) shall transfer
all or substantially all of its properties and/or assets to any Person, then, and in each such case, the party (or its successors or permitted assigns, as applicable) shall ensure that such Person assumes all of the obligations of such party (or its
successors or permitted assigns, as applicable) under this Agreement and all applicable Ancillary Agreements. 

Section 10.13 Severability. Whenever possible, each provision or portion of any provision of this Agreement and the Ancillary
Agreements shall be interpreted in such manner as to be effective and valid under applicable Law, but if any provision or portion of any provision of this Agreement or the Ancillary Agreements is held to be invalid, illegal or unenforceable in any
respect under any applicable Law or rule in any jurisdiction, such invalidity, illegality or unenforceability shall not affect any other provision or portion of any provision in such jurisdiction, and this Agreement or the Ancillary Agreements shall
be reformed, construed and enforced in such jurisdiction as if such invalid, illegal or unenforceable provision or portion of any provision had never been contained herein. 
 Section 10.14 Waiver of Jury Trial. EACH OF THE PARTIES TO THIS AGREEMENT HEREBY IRREVOCABLY WAIVES ALL RIGHT TO TRIAL BY JURY IN ANY ACTION, PROCEEDING OR COUNTERCLAIM ARISING OUT OF OR
RELATING TO THIS AGREEMENT, ANY OF THE ANCILLARY AGREEMENTS OR THE TRANSACTIONS CONTEMPLATED HEREBY OR THEREBY. 

Section 10.15 Counterparts. This Agreement and each Ancillary Agreement may be executed in one or more counterparts, all of
which shall be considered one and the same instrument and shall become effective when one or more counterparts have been signed by each of the parties and delivered to the other parties. 

Section 10.16 Facsimile Signature. This Agreement may be executed by facsimile signature and a facsimile signature shall
constitute an original for all purposes. 
 [The remainder of this page is intentionally left blank.] 

  
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 IN WITNESS WHEREOF, the parties have caused this Agreement to be executed by their duly
authorized representatives as of the date first set forth above. 
  

									
		 		 	THE WILLIAMS COMPANIES, INC.
					
		 		 		 	 By:
	 	/s/ Alan S. Armstrong
		 		 		 		 	Name: Alan S. Armstrong
		 		 		 		 	Title: Chief Executive Officer

  

									
		 		 	 WPX ENERGY, INC.

					
		 		 		 	 By:
	 	/s/ Ralph A. Hill
		 		 		 		 	Name: Ralph A. Hill
		 		 		 		 	Title: Chief Executive Officer

 [Signature Page to Separation and Distribution Agreement] 

 Exhibit A 
 Contributed Entities 
 (such entities are held 100% by WPX Energy, Inc.

 or its subsidiaries unless otherwise noted) 
 WPX Energy, Inc. 
 Williams Production Holdings LLC 

Williams Production Ryan Gulch LLC 
 Williams
Production RMT Company LLC 
 Fort Union Gas Gathering, L.L.C. (11.11%) 
 Bison Royalty LLC 
 Barrett Resources International Corporation 

Dakota-3 E&P Company, LLC 
 D-3 Van Hook
Gathering Services, LLC 
 Williams Production Company, LLC 
 Williams Production Rocky Mountain Company 
 Williams Production Mid-Continent Company 

Williams Arkoma Gathering Company, LLC 
 Williams
Production Keystone LLC 
 WPX Gas Resources Company 
 Williams Production Appalachia LLC 
 Williams Marcellus Gathering LLC 

Diamond Elk, LLC 
 RW Gathering, LLC (50%)

 Mockingbird Pipeline, L.P. 
 Williams
Production — Gulf Coast Company, L.P. 
 WPX Enterprises, Inc. 
 WPX Energy Marketing, LLC 
 Northwest Argentina Corporation 

Williams International Oil & Gas (Venezuela) Limited 
 WPX Energy Services Company, LLC 
 WPX Energy Marketing Services Company, LLC 

[Exhibit A to Separation and Distribution Agreement]

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