Document:

Exhibit
4.5

 

      ,
2010

 

Global
Hunter Securities, LLC

400
Poydras Street, Suite 1510

New
Orleans, Louisiana 70130

 

And

 

Lorus
Therapeutics Inc.

2
Meridian Road

Toronto,
Ontario

M9W
4Z7

 

Ladies &
Gentlemen:

 

1.             As an inducement to Global Hunter Securities, LLC (“GHS”) to execute and act as Placement Agent under a
Placement Agency Agreement proposed to be entered into with Lorus Therapeutics
Inc. (the “Company”), pursuant to which an
offering of common shares of the Company or any successor (by merger or otherwise)
thereto (the “Securities”) will be made pursuant
to an F-1 registration statement that is to be filed with the United States
Securities Exchange Commission (the “Offering”) ,
the undersigned hereby agrees that during the period specified in paragraph 2
below (the “Lock-Up Period”), the
undersigned will not offer, sell, contract to sell, pledge or otherwise dispose
of, directly or indirectly, any Securities or securities convertible into or
exchangeable or exercisable for any Securities, whether now owned or
hereinafter acquired, owned directly by the undersigned (including holding as a
custodian) or with respect to which the undersigned has beneficial ownership
within the rules and regulations of the United States Securities and
Exchange Commission, and will not enter into a transaction which would have the
same effect, or enter into any swap, hedge or other arrangement that transfers,
in whole or in part, any of the economic consequences of ownership of such
Securities, whether any such aforementioned transaction is to be settled by
delivery of the Securities or other securities, in cash or otherwise, (and each
of the foregoing referred to as a “Transfer”) or,
except as required by applicable law, publicly disclose the intention to make
any such Transfer, without, in each case, the prior written consent of GHS,
such consent not to be unreasonably withheld.

 

2.             The Lock-Up Period will commence on the date that
the Company notifies the undersigned in writing that it has closed the Offering
and shall terminate on the earlier of:

 

(a)           45 days after
such closing; and

(b)           August 1,
2010.

 

3.             Any Securities received upon exercise of options
granted to the undersigned will also be subject to this Agreement.  Any Securities acquired by the undersigned in
the open market after the Public Offering Date will not be subject to this
Agreement.

 

4.             Notwithstanding the foregoing paragraphs 1, 2 and 3,
the undersigned may

 

 

(a)           Transfer any or all of the Securities

 

(i)      as a bona fide gift or
gifts, provided that the donee or donees thereof agree to be bound in writing
by the restrictions set forth herein, or

(ii)    to any trust for the direct
or indirect benefit of the undersigned or the immediate family of the
undersigned, provided that the trustee of the trust agrees to be bound in
writing by the restrictions set forth herein, and provided further that any
such transfer shall not involve a disposition for value,

(iii)   if the undersigned is a
corporation, the corporation may transfer the Securities to any wholly owned subsidiary
of such corporation, or

(iv)   in the case of the undersigned, a distribution to
the undersigned’s investors

 

provided
that in any Transfer contemplated in (i), (ii), (iii) and (iv) above,
it shall be a condition to the Transfer that the transferee execute a Lock-Up
Agreement stating that the transferee is receiving and holding such Securities
subject to the provisions of this Lock-Up Agreement and there shall be no
further transfer of such Securities except in accordance with this Lock-Up
Agreement.  For purposes of this Lock-Up
Agreement, “immediate family” shall mean any relationship by blood, marriage or
adoption, not more remote than first cousin;

(b)     Transfer any or all of the
Securities pursuant to a private transaction that is exempt from the prospectus
and registration requirements of applicable securities laws;

(c)     if the undersigned is an
individual, upon such individual ceasing to be a director of the Company or
upon the death, termination of employment of or loss of office of such individual
from the Company (provided that the individual is not, and will not be after
such event, employed by a subsidiary of the Company), the undersigned or the
executor of the undersigned’s estate (upon the death of the undersigned) may
Transfer any or all of the Securities;

(d)     Transfer any or all of the
Securities pursuant to a bona fide take over bid made to all shareholders of,
or for a majority of the Securities of, the Company, or plan of arrangement
involving the Company, or other similar acquisition transaction; and

(e)     pledge any or all of the
Securities to a bank or other financial institution, for the purpose of giving
collateral for a debt incurred in good faith.

 

5.             In addition, the undersigned agrees that, without
the prior written consent of GHS, such consent not to be unreasonably withheld,
it will not, during the Lock-Up Period, exercise any of its rights under the
registration rights agreement between the undersigned and the Company dated as
of August 30, 2006, as amended.

 

6.             In furtherance of the foregoing, the Company and its
transfer agent and registrar are hereby authorized to decline to make any
transfer of shares of Securities if such transfer would constitute a violation
or breach of this Agreement

 

7.             This Agreement
shall be binding on the undersigned and the successors, heirs, personal
representatives and assigns of the undersigned. 
This agreement shall be governed by,
and construed in accordance with, the laws of the State of New York.

 

 

Very
truly yours,

 

 

	
   

  	
   

  	
   

  
	
  [Name]

  	
   

  	
   

  
	
   

  	
   

  	
   

  
	
   

  	
   

  	
   

  
	
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  Exhibit 10.10    
    

 
    SIXTH AMENDMENT TO THIRD AMENDED AND RESTATED
  CREDIT AGREEMENT    
    

        This SIXTH AMENDMENT TO THIRD AMENDED AND RESTATED CREDIT AGREEMENT (this "Amendment")
is made as of May 12, 2010, by and among ANTERO RESOURCES CORPORATION, a Delaware corporation ("Antero"), ANTERO RESOURCES MIDSTREAM CORPORATION,
a Delaware corporation ("Antero Midstream"), ANTERO RESOURCES PICEANCE CORPORATION, a Delaware corporation ("Antero
Piceance"), ANTERO RESOURCES PIPELINE CORPORATION, a Delaware corporation ("Antero Pipeline"), and ANTERO RESOURCES APPALACHIAN
CORPORATION, a Delaware corporation ("Antero Appalachian" and, together with Antero, Antero Midstream, Antero Piceance and Antero Pipeline, each, a
"Borrower" and collectively, the "Borrowers"), CERTAIN SUBSIDIARIES OF BORROWERS, as Guarantors, the
LENDERS party hereto, and JPMORGAN CHASE BANK, N.A., as Administrative Agent (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 Borrowers, the Guarantors, the Administrative Agent and the Lenders have
entered into that certain Third Amended and Restated Credit Agreement, dated as of January 14, 2009 (as amended, restated, supplemented or otherwise modified from time to time, the
"Credit Agreement"); and 

        WHEREAS, the Administrative Agent, the Lenders, the Borrowers and the Guarantors have agreed to amend the Credit Agreement (a) to
increase the Aggregate Commitment and Borrowing Base and (b) for certain other purposes as provided herein, in each case, subject to the terms and conditions set forth herein. 

        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 Borrowers, the Guarantors, 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 1.01 of the Credit Agreement shall be and they hereby
are amended and restated in their respective entireties to read as follows: 

        "Consolidated EBITDAX" means, with respect to any Borrower for any period, the sum of (without duplication) (a) EBITDAX for
such Borrower and its Restricted Subsidiaries (other than Centrahoma) on a Consolidated basis for such period plus (b) (other than for any fiscal quarter during
which the Antero Midstream Sale Closing Date occurs and for any fiscal quarter thereafter) the product of (i) a percent equal to the applicable Borrower's direct or indirect percentage
ownership of the common Equity Interests of Centrahoma as of the last day of such period multiplied by (ii) the EBITDAX of Centrahoma for such
period.

        "Net Cash Proceeds" means, (a) with respect to any sale, transfer, assignment or other disposition of any Borrowing Base
Properties (including any sale, transfer, assignment or other disposition of Equity Interests of a Borrower or a Restricted Subsidiary) by Holdings or any Credit Party, the cash proceeds  

1

 

 received in connection with such sale net of (i) all federal, state and local taxes required to be paid or accrued as a liability under GAAP or required to be paid pursuant to the terms of the
Limited Liability Company Agreement of Holdings dated November 3, 2009 in connection with such sale, transfer, assignment or disposition, (ii) the deduction of appropriate amounts to be
provided as a reserve, in accordance with GAAP, for liabilities associated with such sale, transfer, assignment or disposition and retained by the seller thereof, (iii) any amounts held in
escrow pending determination of purchase price adjustment (such amounts to be become Net Cash Proceeds at the time such amounts are released to a Borrower or Restricted Subsidiary) and
(iv) brokerage fees, professional commissions and other costs and expenses associated therewith, including all legal, title and recording fees and expenses and (b) with respect to any
issuance of Senior Notes, the cash proceeds from such issuance of Senior Notes net of underwriting discounts and commissions and other reasonable costs and expenses associated therewith, including
reasonable legal fees and expenses.

        1.2    Additional Definitions.    The following definitions shall be and they hereby are added to  Section 1.01 of the
Credit Agreement in appropriate alphabetical order: 

        "Antero Midstream Sale" has the meaning assigned to such term in Section 7.16.

        "Antero Midstream Sale Closing Date" means the date the Antero Midstream Sale is consummated.

        "Sixth Amendment Effective Date" means May 12, 2010.

        1.3    Scheduled Redeterminations of the Borrowing Base; Procedures and Standards.    The first sentence of  Section 3.03 of
the Credit Agreement shall be and it hereby is amended and restated in its entirety to read as follows:
 

        Based in part on the Reserve Reports made available to the Administrative Agent and the Lenders pursuant to Section 3.02 and, in the event the Antero
Midstream Sale Closing Date does not occur prior to the next Scheduled Redetermination to occur on or about October 15, 2010, the Midstream Reports delivered to the Administrative Agent and
each Lender pursuant to Section 6.01(l), the Lenders shall redetermine the Borrowing Base on or prior to the next Redetermination Date (or such date promptly thereafter as reasonably possible
based on the engineering and other information available to the Lenders).

        1.4    Special Redeterminations.    Section 3.04 of the Credit
Agreement shall be and it hereby is amended and restated in its entirety to read as follows: 

        Section 3.04.    Special Redeterminations.    In addition
to Scheduled Redeterminations and Special Redeterminations pursuant to Section 7.03(d), (a) the Borrowers may request a Special Redetermination of the Borrowing Base (i) once in
any calendar year ending on or before December 31, 2009 and (ii) twice in any calendar year thereafter and (b) the Required Lenders may request a Special Redetermination
(i) in connection with any incurrence of, or any increase in, Permitted Subordinated Debt, (ii) in connection with the incurrence of Indebtedness described in Section 7.01(g) on
or after the Effective Date, and (iii) once in any calendar year for any other reason. Any request by Borrowers pursuant to this Section 3.04 shall be submitted to the Administrative
Agent and each Lender and at the time of such request (or within fifteen (15) days thereafter in the case of the Reserve Report and the Midstream Report) Borrowers shall (1) deliver to
the Administrative Agent and each Lender a Reserve Report and, in the event the Antero Midstream Sale Closing Date does not occur prior to the next Scheduled Redetermination to occur on or about
October 15, 2010, Midstream Report prepared as of a date prior to the date of such request that is reasonably acceptable to the Administrative Agent and such other information which the
Administrative Agent shall reasonably request, and (2) notify the Administrative Agent and each Lender of the Borrowing Base requested by Borrowers in connection with such Special
Redetermination. Any request by Required Lenders pursuant to this Section 3.04 shall be submitted to the Administrative Agent and the Borrowers. Any Special  

2

 

 Redetermination shall be made by the Administrative Agent and Lenders in accordance with the procedures and standards set forth in Section 3.03; provided that no
Reserve Report or Midstream Report is required to be delivered to the Administrative Agent or the Lenders in connection with any Special Redetermination requested by the Required Lenders pursuant to
this Section 3.04.

        1.5    Financial Statements; Other Information.    Clause (k) of  Section 6.01 of the Credit Agreement shall be and it
hereby is amended and restated in its entirety to read as follows: 

        (k)   at any time prior to the Antero Midstream Sale Closing Date, promptly upon delivery thereof to Centrahoma or any Credit Party or Restricted
Subsidiary, a copy of any Present Value—Cash Flow report (a "Centrahoma Report"), if available, prepared with respect to the natural gas and natural gas
liquids produced or derived from a Centrahoma Partner's Oil and Gas Interests that are being transported through or processed by Centrahoma;

        1.6    Financial Statements; Other Information.    Clause (l) of  Section 6.01 of the Credit Agreement shall be and it
hereby is amended and restated to read as follows: 

        (l)    as soon as available, and in any event no later than April 1 and October 1 of each year prior to the Antero Midstream Sale Closing
Date, and promptly following notice of a Special Redetermination under
Section 3.04, a Midstream Report concerning all Midstream Assets attributed to the Credit Parties and Centrahoma, prepared by employees of the Credit Parties (or no more frequently than once in
any calendar year at the request of Required Lenders, by a third party firm of independent petroleum engineers selected by the Borrower Representative and reasonably acceptable to the Administrative
Agent and the Required Lenders and in a form reasonably acceptable to the Borrower Representative, the Administrative Agent and the Required Lenders), in each case prepared as of the last day of the
preceding calendar month, together with an accompanying report on property sales, property purchase and changes in categories, in the same form and scope as the reports in paragraph (f)
above;

        1.7    Limitations on Indebtedness.    Clause (f) of  Section 7.01 of the Credit Agreement shall be and it hereby is
amended and restated in its entirety to read as follows: 

        (f)    Guarantees by any Credit Party or any Restricted Subsidiary of (i) at any time prior to the Antero Midstream Sale Closing Date, the
Centrahoma Indebtedness and (ii) the Indebtedness permitted under paragraph (j) of this Section 7.01;

        1.8    Limitations on Investments.    Clause (c) of  Section 7.07 of the Credit Agreement shall be and it hereby is
amended and restated in its entirety to read as follows: 

        (c)   make any acquisitions of or capital contributions to or other Investments in any Person, other than (i) Permitted Investments,
(ii) investments in the Equity Interests of any Restricted Subsidiary, and (iii) investments received as consideration for the Antero Midstream Sale.

        1.9    Sale of Antero Midstream.    Article VII of the Credit
Agreement shall be and it hereby is amended by adding a new Section 7.16 to the end thereof to read as follows: 

        Section 7.16.    Sale of Antero
Midstream.    Notwithstanding anything to the contrary contained in this Agreement or any other Loan Document, Holdings may
sell, transfer or otherwise dispose of all, but not less than all, of the Equity Interests of Antero Midstream (the "Antero Midstream Sale");
provided, that (a) at the time of and immediately after giving effect to the Antero Midstream Sale, no Default shall have occurred and be continuing, (b) the
Antero Midstream Sale is consummated on or prior to October 31, 2010, (c) the consideration received by Holdings in respect of the Antero Midstream Sale is at least fair market value (as
reasonably determined by the Board of Directors of Holdings, and if requested by the Administrative Agent or the Required Lenders, the Borrower Representative shall deliver a certificate certifying to
that effect), (d) promptly and in any event within one (1) Business Day after receipt thereof, Holdings contributes the Net Cash Proceeds received in  

3

 

 respect of the Antero Midstream Sale to one or more of the Borrowers, (e) at least seventy-five percent (75%) of the consideration received from the Antero Midstream Sale shall be
in the form of cash or cash equivalents, and (f) if a Borrowing Base Deficiency exists on the Antero Midstream Sale Closing Date, the Borrowers shall prepay the Loans with the Net Cash Proceeds
received in respect of the Antero Midstream Sale on the Business Day on which it receives such Net Cash Proceeds from Holdings to the extent necessary to eliminate such Borrowing Base
Deficiency.

        1.10    Administrative Agent.    Article X of the Credit
Agreement shall be and it hereby is amended by adding a new paragraph to the end thereof to read as follows: 

        Each Lender and the Issuing Bank hereby authorize the Administrative Agent to release any Collateral that is permitted to be sold or released pursuant to the
terms of the Loan Documents. Each Lender and the Issuing Bank hereby authorize the Administrative Agent to execute and deliver to the Borrower, at the Borrower's sole cost and expense, any and all
releases of Liens, termination statements, assignments or other documents reasonably requested by the Borrower in connection with any sale or other disposition of Collateral to the extent such sale or
other disposition is permitted by the terms of Section 7.05, Section 7.16 or is otherwise authorized by the terms of the Loan Documents. For the avoidance of doubt and without limiting
the generality of the foregoing, upon the consummation of the Antero Midstream Sale in accordance with the terms of this Agreement, each Lender and the Issuing Bank hereby authorizes the
Administrative Agent to (a) release Antero Midstream from its obligations (i) as a Borrower and Guarantor under this Agreement and the other Loan Documents and (ii) as a Grantor
under any Security Document, (b) release Centrahoma from its obligations as a Restricted Subsidiary under this Agreement and the other Loan Documents, (c) terminate the Midstream Pledge
Agreement, and (d) terminate and release all of the Liens and security interests granted by Antero Midstream under the Security Documents securing repayment of the Obligations and Guaranteed
Liabilities under the Loan Documents.

        1.11    Amendment to Schedule 1.01.    Schedule 1.01 to
the Credit Agreement shall be and it hereby is amended in its entirety and replaced with Schedule 1.01 attached hereto. 

        SECTION 2.    Redetermined Borrowing Base.    This Amendment shall constitute notice of the Redetermination of
the Borrowing Base pursuant to Section 3.05 of the Credit Agreement, and the
Administrative Agent, the Lenders, the Borrowers and the Guarantors hereby acknowledge that effective as of the Sixth Amendment Effective Date, the Borrowing Base is $400,000,000, and such
redetermined Borrowing Base shall remain in effect until the earlier of (i) the next Redetermination of the Borrowing Base and (ii) the date such Borrowing Base is otherwise reduced
pursuant to the terms of this Agreement. For the avoidance of doubt, the parties hereto hereby acknowledge and agree that (i) such redetermined Borrowing Base was established by the
Administrative Agent and the Lenders without giving effect to any Midstream Assets included in the Midstream Report most recently delivered to the Administrative Agent and the Lenders pursuant to  Section 6.01(l)
 and (ii) the consummation of the Antero Midstream Sale shall not result in any adjustment to the Borrowing Base under the
asset sale provisions of Section 7.05 of the Credit Agreement. 

        SECTION 3.    Increase of Commitments.    One or more of the Lenders has agreed to increase its respective
Commitment under the Credit Agreement to the amount set forth opposite its name on Schedule 1.01 to this Amendment. On the Sixth Amendment
Effective Date and after giving effect to the increase in the Borrowing Base, the Commitment and Applicable Percentage of each Lender shall be as set forth on  Schedule 1.01 to this Amendment. Each
Lender hereby consents to the Applicable Percentages and Commitments set forth on  Schedule 1.01 to this Amendment. 

        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 increase of the Commitments contained in Section 3 of
this Amendment shall be effective upon the satisfaction of each of the conditions set forth in this Section 4. 

4

 

        4.1    Execution and Delivery.    Each Credit Party, the Lenders, and the Administrative Agent shall have executed and
delivered this Amendment. 

        4.2    No Default.    No Default shall have occurred and be continuing or shall result from the effectiveness of this
Amendment. 

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

        SECTION 5.    Representations and Warranties of Credit Parties.    To induce the Lenders to enter into this
Amendment, each Credit Party hereby represents and warrants to the Lenders as follows: 

        5.1    Reaffirmation of Representations and Warranties/Further Assurances.    After giving effect to the amendments
herein, each representation and warranty of such 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 (except to the extent such representations and warranties specifically refer to an earlier date, in which case they are true and correct in all material respects as of such earlier date). 

        5.2    Corporate Authority; No Conflicts.    The execution, delivery and performance by each Credit Party of this
Amendment are within such Credit Party's corporate or other organizational 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 any Credit Party or result in the creation or imposition of
any Lien upon any of the assets of any Credit Party except for Permitted Liens and otherwise as permitted in the Credit Agreement. 

        5.3    Enforceability.    This Amendment constitutes the valid and binding obligation of the Borrowers and each other
Credit Party 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 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 each Credit Party. Each Borrower and each
Guarantor hereby agree that the amendments and modifications herein contained shall in no manner affect or impair the liabilities, duties and obligations of any Credit Party under the Credit Agreement
and the other Loan Documents or the Liens securing the payment and performance thereof. 

        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    Legal Expenses.    Each Credit Party hereby agrees to pay all reasonable 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. 

        6.4    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 

5

 

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. 

        6.5    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. 

        6.6    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. 

        6.7    Governing Law.    This Amendment shall be construed in accordance with and governed by the laws of the State of
Texas. 

        6.8    Loan Document.    This Amendment shall constitute a Loan Document for all purposes and in all respects. 

 
  [Remainder of page intentionally blank.
  Signature pages follow.]    
    

6

  
        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. 

 

 

							
	 	 	 BORROWERS:
	

 	
 	
 ANTERO RESOURCES CORPORATION
	

 	
 	
 ANTERO RESOURCES MIDSTREAM CORPORATION
	

 	
 	
 ANTERO RESOURCES PICEANCE CORPORATION
	

 	
 	
 ANTERO RESOURCES PIPELINE CORPORATION
	

 	
 	
 ANTERO RESOURCES APPALACHIAN CORPORATION
	

 	
 	
By:	
 	
/s/ Alvyn A. Schopp

 
	 	 	 	 	Name:	 	Alvyn A. Schopp
	 	 	 	 	Title:	 	Treasurer and Vice President,

Administration and Accounting
	

 	
 	
 RESTRICTED SUBSIDIARIES:
	

 	
 	
 ANTERO RESOURCES FINANCE CORPORATION
	

 	
 	
By:	
 	
/s/ Alvyn A. Schopp

 
	 	 	 	 	Name:	 	Alvyn A. Schopp
	 	 	 	 	Title:	 	Treasurer and Vice President,

Administration and Accounting

 

 SIGNATURE
PAGE 

 

 

							
	 	 	 JPMORGAN CHASE BANK, N.A.,

as Administrative Agent, Issuing Bank and a Lender
	

 	
 	
By:	
 	
/s/ Ryan Fuessel

 
	 	 	 	 	Name:	 	Ryan Fuessel
	 	 	 	 	Title:	 	Senior Vice President

 

 SIGNATURE
PAGE 

 

 

							
	 	 	 BANK OF SCOTLAND plc,

as Co-Syndication Agent and a Lender
	

 	
 	
By:	
 	
/s/ Julia R. Franklin

 
	 	 	 	 	Name:	 	Julia R. Franklin
	 	 	 	 	Title:	 	Assistant Vice President

 

 SIGNATURE
PAGE 

 

 

							
	 	 	 BNP PARIBAS,

as Co-Syndication Agent and a Lender
	

 	
 	
By:	
 	
/s/ Andrew Ostrov

 
	 	 	 	 	Name:	 	Andrew Ostrov
	 	 	 	 	Title:	 	Director
	

 	
 	
By:	
 	
/s/ Matthew A. Turner

 
	 	 	 	 	Name:	 	Matthew A. Turner
	 	 	 	 	Title:	 	Vice President

 

 SIGNATURE
PAGE 

 

 

							
	

        
	 	 
	 	 
	 	 

	 
	 	 UNION BANK, N.A. (f/k/a UNION BANK OF CALIFORNIA, N.A.),

as Documentation Agent and a Lender
	 
	 	 By:
	 	 /s/ Brian Caddell

 
	 
	 	 	 	Name:	 	Brian Caddell
	 
	 	 	 	Title:	 	Assistant Vice President

 

 SIGNATURE
PAGE 

 

 

							
	

        
	 	 
	 	 
	 	 

	 
	 	 WELLS FARGO BANK, N.A.,

as a Lender
	 
	 	 By:
	 	 /s/ Oleg Kogan

 
	 
	 	 	 	Name:	 	Oleg Kogan
	 
	 	 	 	Title:	 	Vice President

 

 SIGNATURE
PAGE 

 

 

							
	

        
	 	 
	 	 
	 	 

	 
	 	 BARCLAYS BANK PLC,

as a Lender
	 
	 	 By:
	 	 /s/ Sam Yoo

 
	 
	 	 	 	Name:	 	Sam Yoo
	 
	 	 	 	Title:	 	Assistant Vice President

 

 SIGNATURE
PAGE 

 

 

							
	

        
	 	 
	 	 
	 	 

	 
	 	 U.S. BANK NATIONAL ASSOCIATION,

as a Lender
	 
	 	 By:
	 	 /s/ Daria Mahoney

 
	 
	 	 	 	Name:	 	Daria Mahoney
	 
	 	 	 	Title:	 	Vice President

 

 SIGNATURE
PAGE 

 

 

							
	

        
	 	 
	 	 
	 	 

	 
	 	 CREDIT AGRICOLE CORPORATE AND INVESTMENT BANK (f/k/a CALYON NEW YORK BRANCH),

as a Lender
	 
	 	 By:
	 	 /s/ Sharada Manne

 
	 
	 	 	 	Name:	 	Sharada Manne
	 
	 	 	 	Title:	 	Director
	 
	 	 By:
	 	 /s/ Dixon Schultz

 
	 
	 	 	 	Name:	 	Dixon Schultz
	 
	 	 	 	Title:	 	Director

 

 SIGNATURE
PAGE 

 

 

							
	 	 	 COMERICA BANK,

as a Lender
	

 	
 	
By:	
 	
/s/ Paul J. Edmonds

 
	 	 	 	 	Name:	 	Paul J. Edmonds
	 	 	 	 	Title:	 	Vice President

 

 SIGNATURE
PAGE 

 

 

							
	 	 	 KEYBANK, NATIONAL ASSOCIATION,

as a Lender
	

 	
 	
By:	
 	
/s/ Todd Coker

 
	 	 	 	 	Name:	 	Todd Coker
	 	 	 	 	Title:	 	Vice President

 

 SIGNATURE
PAGE 

 

 

							
	 	 	 CREDIT SUISSE AG, CAYMAN ISLANDS BRANCH,

as a Lender
	

 	
 	
By:	
 	
/s/ Nupur Kumar

 
	 	 	 	 	Name:	 	Nupur Kumar
	 	 	 	 	Title:	 	Vice President
	

 	
 	
By:	
 	
/s/ Lynne-Marie Paquette

 
	 	 	 	 	Name:	 	Lynne-Marie Paquette
	 	 	 	 	Title:	 	Associate

 

 SIGNATURE
PAGE 

 

 

							
	 	 	 DEUTSCHE BANK TRUST COMPANY AMERICAS,

as a Lender
	

 	
 	
By:	
 	
/s/ Carin Keegan

 
	 	 	 	 	Name:	 	Carin Keegan
	 	 	 	 	Title:	 	Director
	

 	
 	
By:	
 	
/s/ Enrique Landaeta

 
	 	 	 	 	Name:	 	Enrique Landaeta
	 	 	 	 	Title:	 	Vice President

 

 SIGNATURE
PAGE 

 

 

							
	 	 	 GUARANTY BANK AND TRUST COMPANY,

as a Lender
	

 	
 	
By:	
 	
/s/ Gail J. Nofsinger

 
	 	 	 	 	Name:	 	Gail J. Nofsinger
	 	 	 	 	Title:	 	Senior Vice President

 

 SIGNATURE
PAGE 

QuickLinks

Exhibit 10.10

SIXTH AMENDMENT TO THIRD AMENDED AND RESTATED CREDIT AGREEMENT

WITNESSETH

[Remainder of page intentionally blank. Signature pages follow.]

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