Document:

EX-10.50

 Exhibit 10.50 
 SECOND AMENDED, RESTATED AND CONSOLIDATED 
 UNCONDITIONAL GUARANTY

 SEPTEMBER 28, 2012 
 1. Pursuant to this Second Amended, Restated and Consolidated Unconditional Guaranty (this agreement, together with all amendments, restatements, supplements, other modifications and Guaranty Supplements
(as defined below), this “Guaranty”), the undersigned, MRC Permian Company, a Texas corporation, MRC Rockies Company, a Texas corporation, Matador Production Company, a Texas corporation, Longwood Gathering and Disposal Systems GP,
Inc., a Texas corporation, Longwood Gathering and Disposal Systems, LP, a Texas limited partnership, and Matador Resources Company (formerly known as Matador Holdco, Inc.), a Texas corporation, and each other Person who becomes a party hereto
pursuant to Section 21 (each, a “Guarantor,” and collectively, the “Guarantors”), whose address is 5400 LBJ Freeway, Suite 1500, Dallas, Texas 75240, hereby jointly and severally, irrevocably, unconditionally
and absolutely guarantee in favor of (i) Royal Bank of Canada, as administrative agent (in such capacity, “Administrative Agent”) for the Lenders from time to time parties to that certain Third Amended and Restated Credit
Agreement, dated as of September 28, 2012, among MRC Energy Company, a Texas corporation formerly known as Matador Resources Company (the “Borrower”), the Lenders from time to time party thereto, and the Administrative Agent
(as the same may be amended, restated, amended and restated, renewed, extended, supplemented, or otherwise modified from time to time, the “Credit Agreement”; capitalized terms used herein and not otherwise defined herein shall have
the meanings given to such terms in the Credit Agreement) and (ii) the other Secured Parties, their respective successors, endorsees, permitted transferees and permitted assigns, the prompt and complete payment and performance when due, after
the expiration of any applicable cure period under the Credit Agreement, if any, of all Guaranteed Obligations (as herein defined). 
 As used herein, “Guaranteed Obligations” means all Indebtedness and interest (including any interest which, but for the application of the provisions of the Bankruptcy Code, would have
accrued on amounts owed by the Borrower) under the Credit Agreement. This is a joint and several, irrevocable, unconditional and continuing guaranty of payment, and not a guaranty of collection, and the Administrative Agent, on behalf of Secured
Parties, may enforce each Guarantor’s obligations hereunder without first suing or enforcing its rights or remedies against the Borrower or any other Guarantor or obligor or enforcing or collecting any present or future collateral security for
the Guaranteed Obligations. Notwithstanding anything herein or in any other Loan Document to the contrary, in any action or proceeding involving any state corporate law, or any state or federal bankruptcy, insolvency, reorganization or other law
affecting the rights of creditors generally, if, as a result of applicable law relating to fraudulent conveyance or fraudulent transfer, including Section 548 of the Bankruptcy Code or any applicable provisions of comparable state law
(collectively, “Fraudulent Transfer Laws”), the obligations of any Guarantor under this Section 1 would otherwise, after giving effect to (y) all other liabilities of such Guarantor, contingent or otherwise, that are
relevant under such Fraudulent Transfer Laws (specifically excluding, however, any liabilities of such Guarantor in respect of intercompany Debt to the Borrower to the extent that such Debt would be discharged in an amount equal to the amount paid
by such Guarantor hereunder) and (z) the value as assets of such Guarantor (as determined under the applicable provisions of such Fraudulent Transfer Laws) of any rights of 

 
subrogation, contribution, reimbursement, indemnity or similar rights held by such Guarantor pursuant to (i) applicable requirements of law, (ii) Section 10 hereof or
(iii) any other contractual obligations providing for an equitable allocation among such Guarantor and other Subsidiaries or Affiliates of the Borrower of obligations arising under this Guaranty or other guaranties of the Guaranteed Obligations
by such parties, be held or determined to be void, invalid or unenforceable, or subordinated to the claims of any other creditors, on account of the amount of its liability under this Section 1, then the amount of such liability shall, without
any further action by such Guarantor, any Secured Party or any other Person, be automatically limited and reduced to the highest amount that is valid and enforceable and not subordinated to the claims of other creditors as determined in such action
or proceeding. 
 2. Payment of any sum or sums due to the Secured Parties hereunder will be made by each Guarantor immediately
upon demand by Administrative Agent. Each Guarantor agrees that its obligation hereunder shall not be discharged or impaired in any respect by reason of any failure by Administrative Agent to perfect, or continue perfection of, any Lien or security
interest in any security or any delay by Administrative Agent in perfecting any such Lien or security interest. 
 3. Each
Guarantor hereby waives (a) notice of acceptance of this Guaranty, (b) notice of the extension of credit by the Lenders or Issuing Lender to the Borrower, (c) notice of the occurrence of any breach or default by the Borrower in
respect of the Guaranteed Obligations, (d) notice of the sale or foreclosure on any collateral for the Guaranteed Obligations, (e) notice of the transfer of any part or all of the Guaranteed Obligations to any third party, (f) demand
for payment, presentment, protest, notice of protest and non-payment, or other notice of default, notice of acceleration and intention to accelerate, and (g) all other notices (other than notices required by the Loan Documents). 

4. Each Guarantor hereby consents, agrees and acknowledges that its obligations hereunder shall not be released or discharged by, the
following: (a) the renewal, extension, modification, increase, amendment or alteration of the Credit Agreement, the Guaranteed Obligations or any related document or instrument; (b) any forbearance, waiver, extension or compromise granted
to the Borrower by the Secured Parties; (c) the insolvency, bankruptcy, liquidation or dissolution of the Borrower or any other Guarantor or obligor; (d) the invalidity, illegality or unenforceability of all or any part of the Guaranteed
Obligations; (e) the full or partial release of the Borrower, any other Guarantor or obligor; (f) the release, surrender, exchange, subordination, deterioration, waste, loss or impairment (including without limitation negligent, willful
unreasonable or unjustifiable impairment) of any collateral for the Guaranteed Obligations; (g) the failure of the Secured Parties to properly obtain, perfect or preserve any security interest or Lien in any such collateral; (h) the
failure of the Secured Parties to exercise diligence, commercial reasonableness or reasonable care in the preservation, enforcement or sale of any such collateral; (i) the time for the Borrower’s performance of or compliance with any
covenant or agreement contained in the Credit Agreement or any other Loan Document may be extended or such performance or compliance may be waived; and (j) any other act or omission of the Secured Parties, the Borrower or any other Person or
any other circumstance which would otherwise constitute or create a legal or equitable defense in favor of any Guarantor (other than the defenses of final payment and performance). 

  
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 5. Until all of the Guaranteed Obligations have been paid in full in cash, each Guarantor
hereby waives any rights of subrogation, reimbursement, indemnity, or contribution which it may have as a result of paying the Guaranteed Obligations. Any amounts paid to a Guarantor on account of subrogation rights under this Guaranty at any time
when all the Guaranteed Obligations have not been paid in full, shall be held in trust for the benefit of the Administrative Agent and shall promptly be paid to the Administrative Agent to be credited and applied to the Guaranteed Obligations,
whether matured or unmatured or absolute or contingent, in accordance with the terms of the Credit Agreement. 
 6. Each
Guarantor represents and warrants that (a) it has received or will receive direct or indirect benefit from the making of this Guaranty and the creation of the Guaranteed Obligations; (b) each Guarantor is familiar with the financial
condition of the Borrower and the value of any collateral security for the Guaranteed Obligations; (c) none of the Secured Parties has made any representations to any Guarantor in order to induce such Guarantor to execute this Guaranty;
(d) to the best of its knowledge and belief, the execution, delivery and performance by each Guarantor of this Guaranty and the consummation of the transactions contemplated hereunder do not, and will not, contravene or conflict in any material
respect with any law, statute or regulation whatsoever to which such Guarantor is subject or constitute a default (or an event which with notice or lapse of time or both would constitute a default) under, or result in the breach of, any indenture,
mortgage, deed of trust, charge, Lien, or any contract, agreement or other instrument to which such Guarantor is a party or which may be applicable to such Guarantor or any of its assets, except where such contravention, default or breach could not
reasonably be expected to have a Material Adverse Effect; (e) this Guaranty has been authorized by all necessary action of each Guarantor and is a legal and binding obligation of each Guarantor and is enforceable in accordance with its terms,
except as limited by bankruptcy, insolvency or other laws of general application relating to the enforcement of creditors’ rights and general equitable principles; and (f) all representations and warranties made by each Guarantor herein
shall survive the execution hereof. 
 7. Each Guarantor hereby acknowledges that any Guarantor’s termination or
disposition of any ownership interest in the Borrower shall not alter, affect or in any way limit the obligations of such Guarantor hereunder. 
 8. In the event the Borrower is not liable for part or all of the Guaranteed Obligations because the act of creating the obligation is ultra vires, or the officers or persons creating same acted in excess
of their authority, and for these reasons any part of the Guaranteed Obligations cannot be enforced against the Borrower, such fact shall in no manner affect any Guarantor’s liability hereunder; but each Guarantor shall be liable hereunder,
notwithstanding any finding that the Borrower is not liable for part or all of the Guaranteed Obligations, and to the same extent as such Guarantor would have been if the Guaranteed Obligations had been enforceable against the Borrower. 

9. In the event of a default in the payment or performance of all or any part of the Guaranteed Obligations when such Guaranteed
Obligations become due, whether by its terms, by acceleration or otherwise, each Guarantor shall, upon demand, promptly pay the amount due thereon to Administrative Agent, in lawful money of the United States, at Administrative Agent’s address
set forth in the Credit Agreement. One or more successive or concurrent 

  
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actions may be brought against any Guarantor, either in the same action in which the Borrower is sued or in separate actions, as often as Administrative Agent deems advisable. Suit may be brought
or demand may be made against all parties who have signed this Guaranty or any other guaranty in favor of Administrative Agent covering all or any part of the Guaranteed Obligations, or against any one or more of them, separately or together,
without impairing the rights of Administrative Agent against any party hereto. The exercise by Administrative Agent of any right or remedy under this Guaranty or under any other agreement or instrument, at law, in equity or otherwise, shall not
preclude concurrent or subsequent exercise of any other right or remedy. No delay on the part of Administrative Agent in exercising any right hereunder or failure to exercise the same shall operate as a waiver of such right. In no event shall any
waiver of the provisions of this Guaranty be effective unless the same be in writing and signed by Administrative Agent, and then only in the specific instance and for the purpose given. 

10. To the extent that any Guarantor shall be required hereunder to pay a portion of the Guaranteed Obligations exceeding the greater of
(a) the amount of the economic benefit actually received by such Guarantor from the Advances and the Letters of Credit and (b) the amount such Guarantor would otherwise have paid if such Guarantor had paid the aggregate amount of the
Guaranteed Obligations (excluding the amount thereof repaid by the Borrower) in the same proportion as such Guarantor’s net worth at the date enforcement is sought hereunder bears to the aggregate net worth of all the Guarantors at the date
enforcement is sought hereunder, then such Guarantor shall be reimbursed by such other Guarantors for the amount of such excess, pro rata, based on the respective net worths of such other Guarantors at the date enforcement hereunder is sought.
Notwithstanding anything to the contrary, each Guarantor agrees that the Guaranteed Obligations may at any time and from time to time exceed the amount of the liability of such Guarantor hereunder without impairing its guaranty herein or affecting
the rights and remedies of the Guarantors hereunder. This Section 10 is intended only to define the relative rights of the Guarantors, and nothing set forth in this Section 10 is intended to or shall impair the obligations of the
Guarantors, jointly and severally, to pay to the Administrative Agent, for the benefit of the Secured Parties, the Guaranteed Obligations as and when the same shall become due and payable in accordance with the terms hereof. 

11. Any and all payments by or on account of any obligation of any Guarantor hereunder shall be made free and clear of and without
deduction or withholding for any Indemnified Taxes or Other Taxes on the same terms and to the same extent that payments by the Borrower are required to be made free and clear of Indemnified Taxes and Other Taxes pursuant to the terms of
Section 11.9 of the Credit Agreement. 
 12. This Guaranty shall continue to be effective or be reinstated, as the case may
be, if at any time any payment of any of the Guaranteed Obligations is rescinded or must otherwise be returned by any Secured Party or any other Person upon the insolvency, bankruptcy or reorganization of the Borrower or any Guarantor or otherwise,
all as though such payment had not been made. 
 13. If an Event of Default shall have occurred and be continuing, the
Administrative Agent and each of the Secured Parties shall be entitled, at their option, to offset balances (general or special, time or demand, provisional or final) held by them for the accounts of the Guarantors at any of the Administrative
Agent’s or any Secured Party’s offices, in United States 

  
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dollars or in any other currency, against any amount payable by the Guarantors under this Guaranty which is not paid when due, in which case it shall promptly notify the Guarantors thereof;
provided that the Administrative Agent’s or any Secured Party’s failure to give such notice shall not affect the validity thereof. 
 14. All notices shall be given as provided by the terms of the Credit Agreement and to the addresses for notices set forth on the signature pages hereto. 

15. This Guaranty shall be binding upon and inure to the benefit of the parties hereto and their respective successors, assigns,
transferees, and endorsees; provided that the Guarantors may not assign or transfer their respective rights or obligations under this Guaranty. 
 16. Whenever herein the singular number is used, the same shall include the plural where appropriate, and words of any gender shall include each other gender where appropriate. 

17. This Guaranty embodies the entire agreement between the parties hereto, and supersedes all prior agreements, conditions and
understandings, if any, related to the subject matter hereof. This Guaranty may be amended only by a written instrument executed by Guarantors and Administrative Agent. The substantive laws of the State of Texas shall govern the validity,
construction, enforcement and interpretation of this Guaranty. For purposes of litigation pertaining to this Guaranty, each Guarantor, Administrative Agent, and each Secured Party by its acceptance of the benefits of this Guaranty, hereby
irrevocably consent and submit to the non-exclusive personal jurisdiction of state and federal courts located in the State of Texas. The Guarantors, Administrative Agent, and each Secured Party by its acceptance of the benefits of this Guaranty
agree that Dallas County, Texas, is a convenient forum in which to decide any dispute related to this Guaranty or the Credit Agreement and agrees that all actions pertaining to this Guaranty and the Credit Agreement may be brought in Dallas County,
Texas. 
 18. In addition to the obligation of each Guarantor set forth in Section 1 hereof, such Guarantor shall
pay to the Secured Parties all reasonable and documented costs and expenses (including court costs and reasonable attorneys’ fees) incurred by any of the Secured Parties in the preservation or enforcement of its rights and remedies hereunder.
The obligations of the Guarantors under this Section 19 shall survive the termination of this Guaranty. 
 19. This
Guaranty is an amendment and restatement, but not an extinguishment, novation, or release of that certain Amended, Restated and Consolidated Unconditional Guaranty dated December 30, 2011 (the “Existing Guaranty”), executed by
the Guarantors. Each Guarantor who is a party to the Existing Guaranty hereby reaffirms, ratifies, restates and confirms its obligations pursuant to the Existing Guaranty, as applicable, as amended and restated by this Guaranty. This Guaranty, as it
relates to any Guarantor, shall be released and/or terminated in accordance with Section 13.20 of the Credit Agreement. 

20. Upon the execution and delivery by any other Person of a Guaranty Supplement in substantially the form of Exhibit A (each, a
“Guaranty Supplement”), such Person shall become a “Guarantor” hereunder with the same force and effect as if originally named as a Guarantor herein. The execution and delivery of any Guaranty Supplement shall not require
the consent of any other Guarantor hereunder. The rights and obligations of each Guarantor hereunder shall remain in full force and effect notwithstanding the addition of any new Guarantor as a party to this Guaranty. 

  
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 21. This Guaranty may be executed in any number of counterparts, all of which taken together
shall constitute one agreement, and any of the parties hereto may execute this Guaranty by signing any such counterpart. Delivery of an executed counterpart of a signature page of this Guaranty by facsimile or by other electronic transmission shall
be effective as delivery of a manually executed counterpart of this Guaranty. 
 22. THIS GUARANTY AND THE OTHER LOAN
DOCUMENTS REPRESENT THE FINAL AGREEMENT BETWEEN THE PARTIES AND MAY NOT BE CONTRADICTED BY EVIDENCE OF PRIOR, CONTEMPORANEOUS, OR SUBSEQUENT ORAL AGREEMENTS BETWEEN THE PARTIES. THERE ARE NO UNWRITTEN ORAL AGREEMENTS BETWEEN THE PARTIES HERETO.

 23. EACH PARTY HERETO KNOWINGLY, VOLUNTARILY AND INTENTIONALLY WAIVES ANY RIGHT IT MAY HAVE TO A TRIAL BY JURY IN ANY
LITIGATION BASED UPON OR ARISING OUT OF THIS GUARANTY OR ANY RELATED INSTRUMENT OR AGREEMENT OR ANY OF THE TRANSACTIONS CONTEMPLATED BY THIS GUARANTY OR ANY COURSE OF CONDUCT, DEALING, STATEMENTS (WHETHER ORAL OR WRITTEN) OR ACTION OF ANY PARTY
HERETO. NONE OF THE PARTIES HERETO SHALL SEEK TO CONSOLIDATE, BY COUNTERCLAIM OR OTHERWISE, ANY SUCH ACTION IN WHICH A JURY TRIAL HAS BEEN WAIVED WITH ANY OTHER ACTION IN WHICH A JURY TRIAL CANNOT BE OR HAS NOT BEEN WAIVED. THESE PROVISIONS SHALL
NOT BE DEEMED TO HAVE BEEN MODIFIED IN ANY RESPECT OR RELINQUISHED BY ANY PARTY HERETO EXCEPT BY A WRITTEN INSTRUMENT EXECUTED BY ALL THE PARTIES HERETO. EACH REFERENCE TO A “PARTY” OR THE “PARTIES” IN THIS SECTION 23 SHALL
INCLUDE EACH PERSON WHO EXECUTES AND DELIVERS A GUARANTY SUPPLEMENT. 
 [Signature page follows] 

  
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 IN WITNESS WHEREOF, the parties hereto have caused this Guaranty to be duly executed and
delivered by their respective officers thereunto duly authorized as of the day and year first written above. 
  

			
	GUARANTORS:
	
	MRC PERMIAN COMPANY
		
	By:	 	/s/ David E. Lancaster
	Name:	 	David E. Lancaster
	Title:	 	Executive Vice President
	
	MRC ROCKIES COMPANY
		
	By: 	 	/s/ David E. Lancaster
	Name:	 	David E. Lancaster
	Title:	 	Executive Vice President
	
	MATADOR PRODUCTION COMPANY
		
	By:	 	/s/ David E. Lancaster
	Name:	 	David E. Lancaster
	Title:	 	Executive Vice President
	
	 LONGWOOD GATHERING AND
 DISPOSAL SYSTEMS GP, INC.

		
	By:	 	/s/ David E. Lancaster
	Name:	 	David E. Lancaster
	Title:	 	Executive Vice President

  
 Second Amended and
Restated Guaranty – Signature Page 

 
			
	 LONGWOOD GATHERING AND
 DISPOSAL SYSTEMS, LP

		
	By:	 	 Longwood Gathering and Disposal

Systems GP, Inc., its General Partner

		
	By:	 	/s/ David E. Lancaster
	Name:	 	David E. Lancaster
	Title:	 	Executive Vice President
	
	MATADOR RESOURCES COMPANY
		
	By:	 	/s/ David E. Lancaster
	Name:	 	David E. Lancaster
	Title:	 	Executive Vice President
	
	 Address for each Guarantor:
 5400 LBJ Freeway, Suite 1500
 Dallas, Texas 75240

Attention: David Lancaster
 Facsimile No:
(214) 866-4832

  
 Second Amended and
Restated Guaranty – Signature Page 

			
	ACCEPTED AND AGREED TO BY:
	
	 ROYAL BANK OF CANADA,
 as Administrative Agent

		
	By:	 	/s/ Ann Hurley
	Name:	 	Ann Hurley
	Title:	 	Manager, Agency
	
	Address:
	Royal Bank of Canada, as Agent
	20 King Street West,
	4th Floor
	Toronto, Ontario
	M5H1C4, Canada
	Attn: Manager Agency Services Group
	Fax: (416) 842 4023
	
	With a copy to:
	2800 Post Oak Blvd.
	Suite 3900
	Houston, Texas 77056
	Telephone: (713) 403-5607
	Fax: (713) 403-5624
	Attn: Don J. McKinnerney

  
 Second Amended and
Restated Guaranty – Signature Page 

 Exhibit A 
 Form of Guaranty Supplement  
 GUARANTY
SUPPLEMENT NO.              

THIS GUARANTY SUPPLEMENT NO.            (this “Guaranty
Supplement”) is made as of            , to the Second Amended, Restated and Consolidated Unconditional Guaranty dated as of September 28, 2012 (such agreement, together with
all amendments, restatements, other modifications and Guaranty Supplements (as such term is defined therein), the “Guaranty”), among the initial signatories thereto and each other Person which from time to time thereafter became a
party thereto pursuant to Section 21 thereof (each, individually, a “Guarantor” and, collectively, the “Guarantors”), in favor of Administrative Agent (as defined in the Guaranty) for the benefit of the
Secured Parties (as defined in the Guaranty). 
 BACKGROUND. 

Capitalized terms not otherwise defined herein have the meaning specified in the Guaranty. The Guaranty provides that additional parties
may become Guarantors under the Guaranty by execution and delivery of this Guaranty Supplement. Pursuant to the provisions of Section 21 of the Guaranty, the undersigned is becoming a Guarantor under the Guaranty. The undersigned desires
to become a Guarantor under the Guaranty in order to induce the Secured Parties to continue to make credit extensions and accommodations under the Loan Documents. 
 AGREEMENT. 
 NOW, THEREFORE, the undersigned agrees with Administrative
Agent and each other Secured Party as follows: 
 SECTION 1. In accordance with the Guaranty, the undersigned hereby becomes a
Guarantor under the Guaranty with the same force and effect as if it were an original signatory thereto as a Guarantor, and the undersigned hereby (a) agrees to all the terms and provisions of the Guaranty applicable to it as a Guarantor
thereunder and (b) represents and warrants that the representations and warranties made by it as a Guarantor thereunder are true and correct in all material respects (except to the extent such representation and warranty is already qualified by
materiality or by a “Material Adverse Effect” clause, in which case such representation and warranty shall be true and correct in all respects) on and as of the date hereof, except for any such representations and warranties that were made
as of a specified date. Each reference to a “Guarantor” in the Guaranty shall be deemed to include the undersigned. 

SECTION 2. Except as expressly supplemented hereby, the Guaranty shall remain in full force and effect in accordance with its terms.

 SECTION 3. The substantive laws of the State of Texas shall govern the validity, construction, enforcement and interpretation
of this Guaranty Supplement. 

  
 Exhibit A – Guaranty
Supplement 

 SECTION 4. This Guaranty Supplement hereby incorporates by reference the provisions of the
Guaranty, which provisions are deemed to be a part hereof, and this Guaranty Supplement shall be deemed to be a part of the Guaranty. 
 SECTION 5. This Guaranty Supplement may be executed in any number of counterparts, all of which taken together shall constitute one agreement, and any of the parties hereto may execute this Guaranty
Supplement by signing any such counterpart. Delivery of an executed counterpart of a signature page of this Guaranty Supplement by facsimile or by other electronic transmission shall be effective as delivery of a manually executed counterpart of
this Guaranty Supplement. The notice address of the undersigned for any notices or other communications under the Guaranty shall be the notice address as set forth on the signature page attached hereto. 

[Signature page follows] 

  
 Exhibit A – Guaranty
Supplement 

 EXECUTED as of the date above first written. 

 

					
	ADDRESS:	 		 	[ADDITIONAL GUARANTOR]
			
	
                         
                                         
                                         
                

                         
                                         
                                         
                
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	ACCEPTED BY:	 		 	
			
	 ROYAL BANK OF CANADA,
 as
Administrative Agent
	 		 	
			
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 Exhibit A – Guaranty
SupplementEX-10.51

 Exhibit 10.51 
 FIRST AMENDMENT TO THIRD AMENDED AND RESTATED CREDIT AGREEMENT 
 This FIRST
AMENDMENT TO THIRD AMENDED AND RESTATED CREDIT AGREEMENT (this “Amendment”) is entered into as of March 11, 2013, by and among MRC ENERGY COMPANY, a Texas corporation (the “Borrower”), the LENDERS party hereto
and ROYAL BANK OF CANADA, as Administrative Agent for the Lenders (in such capacity, the “Administrative Agent”). Unless otherwise expressly defined herein, capitalized terms used but not defined in this Amendment have the meanings
assigned to such terms in the Credit Agreement (as defined below). 
 WITNESSETH: 

WHEREAS, the Borrower, the Administrative Agent and the Lenders have entered into that certain Third Amended and Restated Credit
Agreement, dated as of September 28, 2012 (as the same has been and may hereafter be amended, restated, supplemented or otherwise modified from time to time, the “Credit Agreement”); and 

WHEREAS, the Borrower has requested that the Administrative Agent and the Lenders amend the Credit Agreement in certain respects
and the Administrative Agent and the Lenders have agreed to do so on the terms and conditions hereinafter set forth. 
 NOW,
THEREFORE, for and in consideration of the mutual covenants and agreements herein contained and other good and valuable consideration, the receipt and sufficiency of which are hereby acknowledged and confessed, the Borrower, the Administrative
Agent and the Lenders hereby agree as follows: 
 SECTION 1. Amendments to Credit Agreement. Subject to the satisfaction or waiver in
writing of each condition precedent set forth in Section 4 of this Amendment, and in reliance on the representations, warranties, covenants and agreements contained in this Amendment, the Credit Agreement shall be amended in the manner
provided in this Section 1. 
 1.1 Amended Definitions. The following definitions in Section 1.1
of the Credit Agreement shall be and they hereby are amended and restated in their respective entireties to read as follows: 
 “Indebtedness” means (a) all indebtedness, obligations and liabilities of every nature, contingent or otherwise, of Borrower or any Guarantor to any of the Lenders, any of the
Lenders’ Affiliates, the Administrative Agent, or the Issuing Lender, individually or collectively, under any Loan Document, whether for principal, interest, reimbursement of amounts drawn under any Letter of Credit, funding indemnification
amounts, fees, expenses, indemnification or otherwise, (b) Lender Hedging Obligations, and (c) Lender Product Obligations, in each case whether existing on the date of this Agreement or arising thereafter, direct or indirect, joint or
several, absolute or contingent, matured or unmatured, liquidated or unliquidated, secured or unsecured, including interest accruing subsequent to the filing of a petition or other action concerning bankruptcy or other similar proceedings, and all
renewals, extensions, refinancings and replacements for the foregoing; provided; however, that Indebtedness shall not include any Excluded Swap Obligations. 

  

					
	MRC ENERGY COMPANY	 		  	
	FIRST AMENDMENT	 	PAGE
 1
	  	

 “Lender Hedging Obligations” means all obligations
arising from time to time under Commodity Hedging Agreements and Interest Rate Agreements permitted hereunder and entered into from time to time between any Credit Party, on the one hand and a Lender Counterparty on the other hand (including any
such obligations under any Existing Commodity Hedging Agreements); provided, however, that if a Lender Counterparty ceases to be a Lender hereunder or an Affiliate of a Lender hereunder, Lender Hedging Obligations shall only include such
obligations to the extent arising from transactions and confirmations entered into under Commodity Hedging Agreements and Interest Rate Agreements at any time such Person was a Lender or an Affiliate of a Lender hereunder, without giving effect to
any extension, increases or modifications thereof which are made after such Person ceases to be a Lender or an Affiliate of a Lender hereunder. 
 “Secured Party” means each of the Administrative Agent, any Lender, any Lender Counterparty, or any Affiliate of any Lender to which any Indebtedness is owed, including any Lender
Hedging Obligations and Lender Product Obligations, provided, however, that a Lender Counterparty and Lenders and Affiliates of Lenders to whom Lender Product Obligations or Lender Hedging Obligations are owed shall be a Secured Party
(a) in the case of Lender Product Obligations, only while such Person (or, in the case of an Affiliate of a Lender, such Lender) is a Lender under this Agreement and (b) in the case of Lender Hedging Obligations, only with respect to
obligations arising from transactions and confirmations entered into under Commodity Hedging Agreements and Interest Rate Agreements at any time such Person (or, in the case of an Affiliate of a Lender, such Lender) is a Lender under this Agreement.

 1.2 Additional Definitions. The following definitions shall be and they hereby are added to
Section 1.1 of the Credit Agreement in appropriate alphabetical order: 
 “Commodity
Exchange Act” means the Commodity Exchange Act (7 U.S.C. § 1 et seq.), as amended from time to time, and any successor statute. 
 “Excluded Swap Obligation” means, with respect to any Guarantor, any Swap Obligation if, and to the extent that, all or a portion of the guarantee of such Guarantor of, or the grant by
such Guarantor of a security interest to secure, such Swap Obligation (or any guarantee thereof) is or becomes illegal under the Commodity Exchange Act or any rule, regulation or order of the Commodity Futures Trading Commission (or the application
or official interpretation of any thereof) by virtue of such Guarantor’s failure for any reason to constitute an “eligible contract participant” as defined in the Commodity Exchange Act and the regulations thereunder at the time the
guarantee of such Guarantor or the grant of such security interest becomes effective with respect to such Swap Obligation. If a Swap Obligation arises under a master agreement governing more than one swap, such exclusion shall apply only to the
portion of such Swap Obligation that is attributable to swaps for which such guarantee or security interest is or becomes illegal. 

  

					
	MRC ENERGY COMPANY	 		  	
	FIRST AMENDMENT	 	PAGE
 2
	  	

 “Swap Obligation” means, with respect to any Guarantor,
any obligation to pay or perform under any agreement, contract or transaction that constitutes a “swap” within the meaning of section 1a(47) of the Commodity Exchange Act. 

1.3 Current Ratio. Clause (b) of Section 7.9 of the Credit Agreement shall be and it hereby is amended and
restated in its entirety to read as follows: 
 (b) Current Ratio. Maintain as of the last day of each
Fiscal Quarter, commencing with the Fiscal Quarter ending March 31, 2014, a Current Ratio of not less than 1.00 to 1.00. 
 1.4 Application of Proceeds of Collateral. Section 10.2 of the Credit Agreement shall be and it hereby is amended by deleting in its entirety the phrase “owing to a Lender or an
Affiliate of a Lender” located in the second clause (d) thereof. 
 1.5 Concerning Lender Hedging Obligations
and Lender Product Obligations. Section 13.19 of the Credit Agreement shall be and it hereby is amended and restated in its entirety to read as follows: 

13.19 Concerning Lender Hedging Obligations and Lender Product Obligations. The benefit of the Collateral
Documents and of the provisions of this Agreement relating to any collateral securing the Indebtedness shall also extend to the Lender Hedging Obligations and the Lender Product Obligations; provided that if any Lender Counterparty ceases to
be a Lender or an Affiliate of a Lender hereunder, (a) such Lender Hedging Obligations shall only include obligations under Commodity Hedging Agreements and Interest Rate Agreements entered into with such Person to the extent arising from
transactions and confirmations entered into at any time such Person was a Lender or an Affiliate of a Lender hereunder, without giving effect to any extension, increases or modifications thereof which are made after such Person ceases to be a Lender
or an Affiliate of a Lender hereunder and (b) any obligations arising under Lender Products extended by such Person shall no longer constitute Lender Product Obligations. No Lender or any Affiliate of a Lender shall have any voting rights under
any Loan Document or with respect to any Collateral, as a result of the existence of obligations owed to it under any Commodity Hedging Agreements, Interest Rate Agreements or agreements relating to Lender Products. All Commodity Hedging Agreements,
Interest Rate Agreements and agreements relating to Lender Products, if any, are independent agreements governed by the written provisions of such agreements, which will remain in full force and effect, unaffected by any repayment, prepayment,
acceleration, reduction, increase or change in the terms of the Advances or this Agreement, except as otherwise expressly provided in such agreements, and any payoff statement from any Lender relating to this Agreement shall not apply to such
agreements except as otherwise expressly provided in such payoff statement. 

  

					
	MRC ENERGY COMPANY	 		  	
	FIRST AMENDMENT	 	PAGE
 3
	  	

 1.6 Schedules. Schedule 1.2 of the Credit Agreement shall be and it hereby is
amended and restated in its entirety and replaced with Schedule 1.2 attached hereto. 
 SECTION 2. Redetermined Borrowing
Base. This Amendment shall constitute notice of a redetermination of the Borrowing Base and the Conforming Borrowing Base pursuant to Section 4.2 of the Credit Agreement, and the Administrative Agent, the Lenders and the Borrower
hereby acknowledge that effective as of the date hereof, the Borrowing Base shall be $255,000,000 and the Conforming Borrowing Base shall be $220,000,000 and such redetermined Borrowing Base and Conforming Borrowing Base shall remain in effect until
the date the Borrowing Base and the Conforming Borrowing Base are otherwise adjusted pursuant to the terms of the Credit Agreement. The redetermination of the Borrowing Base and the Conforming Borrowing Base contained herein shall constitute the
Determination Date to occur on or about May 1, 2013. 
 SECTION 3. New Lenders and Reallocation and Increase of
Revolving Credit Commitment Amounts. The Lenders have agreed among themselves to reallocate their respective Revolving Credit Commitment Amounts, and to, among other things, allow certain financial institutions identified by RBC Capital
Markets1 (“RBC Capital”), in its capacity
as a Joint Lead Arranger, in consultation with the Borrower, to become a party to the Credit Agreement as a Lender (each, a “New Lender”). Each of the Administrative Agent and the Borrower hereby consent to (i) the reallocation
of the Revolving Credit Commitment Amounts and (ii) each New Lender’s agreement to provide a Revolving Credit Commitment Amount. On the date this Amendment becomes effective and after giving effect to such reallocation and increase of the
Revolving Credit Aggregate Commitment, the Revolving Credit Commitment Amount of each Lender shall be as set forth on Schedule 1.2 of this Amendment. Each Lender hereby consents to the Revolving Credit Commitment Amount set forth on
Schedule 1.2 of this Amendment. The reallocation of the Revolving Credit Commitment Amounts among the Lenders, including the acquisition by each New Lender of an interest in the Revolving Credit Aggregate Commitment, shall be deemed to have
been consummated pursuant to the terms of the Assignment and Assumption attached as Exhibit D to the Credit Agreement as if the Lenders, including each New Lender, had executed an Assignment and Assumption with respect to such
reallocation. The Administrative Agent hereby waives the $3,500 processing and recordation fee set forth in Section 13.7(b)(iv) of the Credit Agreement with respect to the assignments and reallocations contemplated by this
Section 3. To the extent requested by any Lender, and in accordance with Section 11.1 of the Credit Agreement, the Borrower shall pay to such Lender, within the time period prescribed by Section 11.1 of the Credit
Agreement, any amounts required to be paid by the Borrower under Section 11.1 of the Credit Agreement in the event the payment of any principal of any Eurodollar-based Advance or the conversion of any Eurodollar-based Advance other than
on the last day of an Interest Period applicable thereto is required in connection with the reallocation contemplated by this Section 3. 
 SECTION 4. Conditions. The amendments to the Credit Agreement contained in Section 1 of this Amendment, the redetermination of the Borrowing Base contained in Section 2 of
this Amendment and the reallocation of the Revolving Credit Commitment Amounts contained in Section 3 of this Amendment shall be effective upon the satisfaction of each of the conditions set forth in this Section 4.

  
  

	1 	 The global brand name for the corporate and investment banking businesses of Royal Bank of Canada and its affiliates. 

  

					
	MRC ENERGY COMPANY	 		  	
	FIRST AMENDMENT	 	PAGE
 4
	  	

 4.1 Execution and Delivery. The Administrative Agent shall have received a duly
executed counterpart of (a) this Amendment signed by the Borrower and the Lenders and (b) the Consent and Reaffirmation attached hereto signed by each Guarantor. 
 4.2 No Default. No Default or Event of Default shall have occurred and be continuing or shall result from the effectiveness of this Amendment. 

4.3 Fees. The Borrower and the Administrative Agent shall have executed and delivered a fee letter in connection with this
Amendment, and the Administrative Agent shall have received the fees separately agreed upon in such fee letter. 
 4.4
Notes. The Administrative Agent shall have received Notes duly executed by the Borrower for each New Lender that requests a Note in accordance with Section 2.2(e) of the Credit Agreement. 

4.5 Mortgages. The Credit Parties shall have executed and delivered to the Administrative Agent Mortgages and title information,
in each case, reasonably satisfactory to the Administrative Agent with respect to the Oil and Gas Properties of the Credit Parties, or the portion thereof, as required by Sections 7.16 and 7.17 of the Credit Agreement. 

4.6 Other Documents. The Administrative Agent shall have received such other instruments and documents incidental and appropriate
to the transactions provided for herein as the Administrative Agent or its special counsel may reasonably request, and all such documents shall be in form and substance satisfactory to the Administrative Agent. 

SECTION 5. Representations and Warranties. To induce the Lenders to enter into this Amendment, the Borrower hereby represents and warrants to the
Lenders as follows: 
 5.1 Reaffirmation of Representations and Warranties. After giving effect to the amendments herein,
each representation and warranty of the Borrower, the Parent and each other Credit Party contained in the Credit Agreement and in each of the other Loan Documents is true and correct in all material respects as of the date hereof (without
duplication of any materiality qualifier contained therein), except to the extent any such representations and warranties are expressly limited to an earlier date, in which case, such representations and warranties shall continue to be true and
correct in all material respects (without duplication of any materiality qualifier contained therein) as of such specified earlier date. 
 5.2 Corporate Authority; No Conflicts. The execution, delivery and performance by the Borrower of this Amendment and all documents, instruments and agreements contemplated herein are within the
Borrower’s corporate powers, have been duly authorized by necessary action, require no action by or in respect of, or filing with, any court or agency of government and do not violate or constitute a default under any provision of any
applicable law or other agreements binding upon the Borrower or result in the creation or imposition of any Lien upon any of the assets of the Borrower except for Liens permitted by Section 8.2 of the Credit Agreement and otherwise as
permitted in the Credit Agreement. 

  

					
	MRC ENERGY COMPANY	 		  	
	FIRST AMENDMENT	 	PAGE
 5
	  	

 5.3 Enforceability. This Amendment constitutes the valid and binding obligation of
the Borrower enforceable in accordance with its terms, except as (i) the enforceability thereof may be limited by bankruptcy, insolvency or similar laws affecting creditor’s rights generally, and (ii) the availability of equitable
remedies may be limited by equitable principles of general application. 
 5.4 No Default. As of the date hereof, both
before and immediately after giving effect to this Amendment, no Default or Event of Default has occurred and is continuing. 
 SECTION 6.
Miscellaneous. 
 6.1 Reaffirmation of Loan Documents and Liens. Any and all of the terms and provisions of the Credit
Agreement and the Loan Documents shall, except as amended and modified hereby, remain in full force and effect and are hereby in all respects ratified and confirmed by the Borrower. The Borrower hereby agrees that the amendments and modifications
herein contained shall in no manner affect or impair the liabilities, duties and obligations of the Borrower, the Parent or any other Credit Party under the Credit Agreement and the other Loan Documents or the Liens securing the payment and
performance thereof, except as amended and modified hereby. 
 6.2 Parties in Interest. All of the terms and provisions
of this Amendment shall bind and inure to the benefit of the parties hereto and their respective successors and assigns. 

6.3 Further Assurances. The Borrower covenants and agrees from time to time, as and when requested by the Administrative Agent or
the Lenders, to execute and deliver or cause to be executed or delivered, all such documents, instruments and agreements and to take or cause to be taken such further or other action as the Administrative Agent or the Lenders may reasonably deem
necessary or desirable in order to carry out the intent and purposes of this Amendment. 
 6.4 Legal Expenses. The
Borrower hereby agrees to pay all reasonable and documented out-of-pocket fees and expenses of special counsel to the Administrative Agent incurred by the Administrative Agent in connection with the preparation, negotiation and execution of this
Amendment and all related documents. 
 6.5 Counterparts. This Amendment may be executed in one or more counterparts and
by different parties hereto in separate counterparts each of which when so executed and delivered shall be deemed an original, but all such counterparts together shall constitute but one and the same instrument; signature pages may be detached from
multiple separate counterparts and attached to a single counterpart so that all signature pages are physically attached to the same document. Delivery of photocopies of the signature pages to this Amendment by facsimile or electronic mail shall be
effective as delivery of manually executed counterparts of this Amendment. 
 6.6 Complete Agreement. THIS AMENDMENT, THE
CREDIT AGREEMENT, AND THE OTHER LOAN DOCUMENTS REPRESENT THE FINAL AGREEMENT BETWEEN THE PARTIES AND MAY NOT BE CONTRADICTED BY EVIDENCE OF PRIOR, CONTEMPORANEOUS OR ORAL AGREEMENTS OF THE PARTIES. THERE ARE NO UNWRITTEN ORAL AGREEMENTS BETWEEN THE
PARTIES. 

  

					
	MRC ENERGY COMPANY	 		  	
	FIRST AMENDMENT	 	PAGE
 6
	  	

 6.7 Headings. The headings, captions and arrangements used in this Amendment are,
unless specified otherwise, for convenience only and shall not be deemed to limit, amplify or modify the terms of this Amendment, nor affect the meaning thereof. 
 6.8 Governing Law. This Amendment shall be construed in accordance with and governed by the laws of the State of Texas. 
 6.9 Severability. Any provision of this Amendment held to be invalid, illegal or unenforceable in any jurisdiction shall, as to such jurisdiction, be ineffective to the extent of such invalidity,
illegality or unenforceability without affecting the validity, legality and enforceability of the remaining provisions hereof; and the invalidity of a particular provision in a particular jurisdiction shall not invalidate such provision in any other
jurisdiction. 
 6.10 Reference to and Effect on the Loan Documents. 

(a) This Amendment shall be deemed to constitute a Loan Document for all purposes and in all respects. Each reference in the Credit
Agreement to “this Agreement,” “hereunder,” “hereof,” “herein” or words of like import, and each reference in the Credit Agreement or in any other Loan Document, or other agreements, documents or other
instruments executed and delivered pursuant to the Credit Agreement to the “Credit Agreement”, shall mean and be a reference to the Credit Agreement as amended by this Amendment. 

(b) The execution, delivery and effectiveness of this Amendment shall not operate as a waiver of any right, power or remedy of any Lender
or the Administrative Agent under any of the Loan Documents, nor constitute a waiver of any provision of any of the Loan Documents. 
 [Signature pages follow.] 

  

					
	MRC ENERGY COMPANY	 		  	
	FIRST AMENDMENT	 	PAGE
 7
	  	

 IN WITNESS WHEREOF, the parties have caused this Amendment to be duly executed by
their respective authorized officers to be effective as of the date first above written. 
  

			
	BORROWER:
	
	 MRC ENERGY COMPANY,
 as Borrower

		
	By:	 	 /s/ David E. Lancaster

	Name:	 	David E. Lancaster
	Title:	 	Executive Vice President

  

					
	MRC ENERGY COMPANY	  		  	
	FIRST AMENDMENT	  	SIGNATURE PAGE	  	

 
			
	ROYAL BANK OF CANADA,
	as Administrative Agent
		
	By:	 	 /s/ Rodica Dutka

	Name:	 	Rodica Dutka
	Title:	 	Manager, Agency
	
	 ROYAL BANK OF CANADA,
 as a Lender and as a Issuing Lender

		
	By:	 	 /s/ Don J. McKinnerney

	Name:	 	Don J. McKinnerney
	Title:	 	Authorized Signatory

  

					
	MRC ENERGY COMPANY	  		  	
	FIRST AMENDMENT	  	SIGNATURE PAGE	  	

 
			
	CITIBANK, N.A.,
	as a Lender
		
	By:	 	 /s/ Ryan Watson

	Name:	 	Ryan Watson
	Title:	 	Senior Vice President

  

					
	MRC ENERGY COMPANY	  		  	
	FIRST AMENDMENT	  	SIGNATURE PAGE	  	

 
			
	COMERICA BANK,
	as a Lender and as a Issuing Lender
		
	By:	 	 /s/ Brandon M. White

	Name:	 	Brandon M. White
	Title:	 	Corporate Banking Officer

  

					
	MRC ENERGY COMPANY	  		  	
	FIRST AMENDMENT	  	SIGNATURE PAGE	  	

 
			
	SUNTRUST BANK,
	as a Lender
		
	By:	 	 /s/ Shannon Juhan

	Name:	 	Shannon Juhan
	Title:	 	Vice President

  

					
	MRC ENERGY COMPANY	  		  	
	FIRST AMENDMENT	  	SIGNATURE PAGE	  	

 
			
	THE BANK OF NOVA SCOTIA,
	as a Lender
		
	By:	 	 /s/ Terry Donovan

	Name:	 	Terry Donovan
	Title:	 	Managing Director

  

					
	MRC ENERGY COMPANY	  		  	
	FIRST AMENDMENT	  	SIGNATURE PAGE	  	

 
			
	BMO Harris Financing, Inc.,
	as a Lender
		
	By:	 	 /s/ James V. Ducote

	Name:	 	James V. Ducote
	Title:	 	Director

  

					
	MRC ENERGY COMPANY	  		  	
	FIRST AMENDMENT	  	SIGNATURE PAGE	  	

 
			
	CAPITAL ONE, N.A.,
	as a Lender
		
	By:	 	 /s/ Matthew Molero

	Name:	 	Matthew Molero
	Title:	 	Vice President

  

					
	MRC ENERGY COMPANY	  		  	
	FIRST AMENDMENT	  	SIGNATURE PAGE	  	

 
			
	IBERIABANK,
	as a Lender
		
	By:	 	 /s/ W. Bryan Chapman

	Name:	 	W. Bryan Chapman
	Title:	 	Executive Vice President

  

					
	MRC ENERGY COMPANY	  		  	
	FIRST AMENDMENT	  	SIGNATURE PAGE	  	

 Schedule 1.2 
 Percentages and Allocations 
 Revolving Credit 

 

									
	LENDERS	  	 REVOLVING
 CREDIT
 ALLOCATIONS
	 	  	 REVOLVING
 CREDIT
 PERCENTAGE
	 
	 Royal Bank of Canada
	  	$	55,000,000	  	  	 	21.5686274510	% 
	 Comerica Bank
	  	$	42,500,000	  	  	 	16.6666666667	% 
	 Citibank , N.A.
	  	$	40,000,000	  	  	 	15.6862745098	% 
	 SunTrust Bank
	  	$	32,500,000	  	  	 	12.7450980392	% 
	 The Bank of Nova Scotia
	  	$	32,500,000	  	  	 	12.7450980392	% 
	 BMO Harris Financing, Inc.
	  	$	20,000,000	  	  	 	7.8431372549	% 
	 Capital One, N.A.
	  	$	20,000,000	  	  	 	7.8431372549	% 
	 IBERIABANK
	  	$	12,500,000	  	  	 	4.90196078431	% 
	 TOTALS
	  	$	255,000,000	  	  	 	100.00000000	% 

  

					
	MRC ENERGY COMPANY	  		  	
	FIRST AMENDMENT	  	SIGNATURE 1.2	  	

 CONSENT AND REAFFIRMATION 

Each of the undersigned (each a “Guarantor”) hereby (i) acknowledges receipt of a copy of the foregoing First
Amendment to Third Amended and Restated Credit Agreement (the “First Amendment”); (ii) consents to the Borrower’s execution and delivery thereof; (iii) agrees to be bound by the terms of the First Amendment;
(iv) affirms that nothing contained therein shall modify in any respect whatsoever its guaranty of the Indebtedness pursuant to the terms of the Guaranty or the Liens granted by it pursuant to the terms of the other Loan Documents to which it
is a party securing payment and performance of the Indebtedness, (v) reaffirms that the Guaranty and the other Loan Documents to which it is a party and such Liens are and shall continue to remain in full force and effect and are hereby
ratified and confirmed in all respects and (vi) represents and warrants to the Administrative Agent and the Lenders that, as of the date hereof, (x) all of the representations and warranties made by it in each of the Loan Documents to
which it is a party are true and correct in all material respects (without duplication of any materiality qualifier contained therein), except to the extent any such representations and warranties are expressly limited to an earlier date, in which
case, such representations and warranties shall continue to be true and correct in all material respects (without duplication of any materiality qualifier contained therein) as of such specified earlier date, and (y) no Default or Event of
Default has occurred and is continuing. Although each Guarantor has been informed of the matters set forth herein and has acknowledged and agreed to same, each Guarantor understands that neither the Administrative Agent nor any of the Lenders have
any obligation to inform any Guarantor of such matters in the future or to seek any Guarantor’s acknowledgment or agreement to future amendments or waivers for the Guaranty and other Loan Documents to which it is a party to remain in full force
and effect, and nothing herein shall create such duty or obligation. 
 [SIGNATURE PAGES FOLLOW] 

  

					
	MRC ENERGY COMPANY	  		  	
	FIRST AMENDMENT	  	CONSENT AND REAFFIRMATION	  	

 IN WITNESS WHEREOF, the undersigned has executed this Consent and Reaffirmation on and as of
the date of the First Amendment. 
  

			
	GUARANTORS:
	
	MRC PERMIAN COMPANY
		
	By:	 	  

	Name:	 	David E. Lancaster
	Title:	 	Executive Vice President
	
	MRC ROCKIES COMPANY
		
	By:	 	  

	Name:	 	David E. Lancaster
	Title:	 	Executive Vice President
	
	MATADOR PRODUCTION COMPANY
		
	By:	 	  

	Name:	 	David E. Lancaster
	Title:	 	Executive Vice President
	
	LONGWOOD GATHERING AND DISPOSAL SYSTEMS GP, INC.
		
	By:	 	  

	Name:	 	David E. Lancaster
	Title:	 	Executive Vice President
	
	LONGWOOD GATHERING AND DISPOSAL SYSTEMS, LP
		
	By:	 	Longwood Gathering and Disposal Systems GP, Inc., its General Partner
		
	By:	 	  

	Name:	 	David E. Lancaster
	Title:	 	Executive Vice President

  

					
	MRC ENERGY COMPANY	  		  	
	FIRST AMENDMENT	  	CONSENT AND REAFFIRMATION SIGNATURE PAGE	  	

 
			
	MATADOR RESOURCES COMPANY
		
	By:	 	  

	Name:	 	David E. Lancaster
	Title:	 	Executive Vice President

  

					
	MRC ENERGY COMPANY	  		  	
	FIRST AMENDMENT	  	CONSENT AND REAFFIRMATION SIGNATURE PAGE

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