Part IV

Agreement and Plan of Merger dated January 9, 2005 among XTO Energy Inc., XTO Barnett Inc., and Antero Resources Corporation (incorporated by reference to Exhibit 2.2 to Form 10-K for the year ended December 31, 2004)

Amendment No. 1 to Agreement and Plan of Merger dated February 3, 2005 among XTO Energy Inc., XTO Barnett Inc., and Antero Resources Corporation (incorporated by reference to Exhibit 2.3 to Form 10-K for the year ended December 31, 2004)

Amendment No. 2 to Agreement and Plan of Merger dated March 22, 2005 among the Company, XTO Barnett Inc., XTO Barnett LLC and Antero Resources Corporation (incorporated by reference to Exhibit 2.1 to Form 8-K filed March 28, 2005)

Amendment No. 3 to Agreement and Plan of Merger dated March 31, 2005 among the Company, XTO Barnett Inc., XTO Barnett LLC and Antero Resources Corporation (incorporated by reference to Exhibit 2.1 to Form 8-K filed April 5, 2005)

Gulf Coast/Rockies/San Juan Package Purchase Agreement dated as of June 1, 2007 between Dominion Exploration & Production, Inc., Dominion Energy, Inc., Dominion Oklahoma Texas Exploration & Production, Inc., Dominion Reserves, Inc., LDNG Texas Holdings, LLC and DEPI Texas Holdings, LLC. as Sellers and XTO Energy Inc. as Buyer. (incorporated by reference to Exhibit 2.1 to Form 8-K filed August 6, 2007)

Restated Certificate of Incorporation of the Company, as restated on June 21, 2006 (incorporated by reference to Exhibit 3.1 to Form 10-Q for the quarter ended June 30, 2006)

Amended and Restated Bylaws of the Company dated November 18, 2003 (incorporated by reference to Exhibit 3.1 to Form 10-Q for the quarter ended March 31, 2006)

Form of Indenture for Senior Debt Securities dated as of April 23, 2002 between the Company and the Bank of New York, as Trustee (incorporated by reference to Exhibit 4.3.1 to Form 8-K filed April 17, 2002)

First Supplemental Indenture dated as of April 23, 2002 between the Company and the Bank of New York, as Trustee for the 7 1/2 % Senior Notes due 2012 (incorporated by reference to Exhibit 4.2 to Form 10-K for the year ended December 31, 2002)

Second Supplemental Indenture dated as of October 1, 2005 between the Company and The Bank of New York Trust Company, as Successor Trustee, for 7 1/2 % Senior Notes due 2012 (incorporated by reference to Exhibit 4.3 to Form 10-Q for the quarter ended March 31, 2006)

Preferred Stock Purchase Rights Agreement dated August 25, 1998 between the Company and ChaseMellon Shareholder Services, LLC (incorporated by reference to Exhibit 4.1 to Form 8-A/A filed September 8, 1998)

Certificate of Designation of Series A Junior Participating Preferred Stock, par value $0.01 per share, dated August 25, 1998 (incorporated by reference to Exhibit 4.1 to Form 10-Q for the quarter ended September 30, 2000)

Registration Rights Agreement among the Company and partners of Cross Timbers Oil Company, L.P. (incorporated by reference to Exhibit 10.9 to Registration Statement on Form S-1, File No. 33-59820)

Indenture dated as of April 23, 2003 between the Company and the Bank of New York, as Trustee for the 6 1/4 % Senior Notes due 2013 (incorporated by reference to Exhibit 4.1 to Form 10-Q for the quarter ended March 31, 2003)

First Supplemental Indenture dated as of October 1, 2005 between the Company and The Bank of New York Trust Company, as Successor Trustee, for 6 1/4 % Senior Notes due 2013 (incorporated by reference to Exhibit 4.4 to Form 10-Q for the quarter ended March 31, 2006)

Registration Rights Agreement dated April 23, 2003 between the Company and certain Initial Purchasers named therein (incorporated by reference to Exhibit 4.2 to Form 10-Q for the quarter ended March 31, 2003)

Indenture for Senior Debt Securities dated as of January 22, 2004 between the Company and the Bank of New York, as Trustee (incorporated by reference to Exhibit 4.3.1 to Form 8-K filed January 16, 2004)

First Supplemental Indenture dated as of January 22, 2004 between the Company and the Bank of New York, as Trustee for the 4.90% Senior Notes due 2014 (incorporated by reference to Exhibit 4.3.2 to Form 8-K filed January 16, 2004)

Second Supplemental Indenture dated as of October 1, 2005 between the Company and The Bank of New York Trust Company, as Successor Trustee, for 4.90% Senior Notes due 2014 (incorporated by reference to Exhibit 4.5 to Form 10-Q for the quarter ended March 31, 2006)

Indenture dated as of September 23, 2004 between the Company and the Bank of New York, as Trustee for the 5% Senior Notes due 2015 (incorporated by reference to Exhibit 4.1 to Form 8-K filed September 24, 2004)

First Supplemental Indenture dated as of October 1, 2005 between the Company and The Bank of New York Trust Company, as Successor Trustee, for 5% Senior Notes due 2015 (incorporated by reference to Exhibit 4.6 to Form 10-Q for the quarter ended March 31, 2006)

Indenture for Senior Debt Securities dated as of April 13, 2005 between the Company and the Bank of New York, as Trustee (incorporated by reference to Exhibit 4.3.1 to Form 8-K filed April 12, 2005)

First Supplemental Indenture dated as of April 13, 2005 between the Company and the Bank of New York, as Trustee for 5.30% Senior Notes due 2015 (incorporated by reference to Exhibit 4.3.2 to Form 8-K filed April 12, 2005)

Second Supplemental Indenture dated as of October 1, 2005 between the Company and The Bank of New York Trust Company, as Successor Trustee, for 5.30% Senior Notes due 2015 (incorporated by reference to Exhibit 4.1 to Form 10-Q for the quarter ended March 31, 2006)

Third Supplemental Indenture dated as of March 30, 2006 between the Company and The Bank of New York Trust Company, as Trustee, for 5.65% Senior Notes due 2016 and 6.10% Senior Notes due 2036 (incorporated by reference to Exhibit 4.2 to Form 10-Q for the quarter ended March 31, 2006)

Registration Rights Agreement dated April 1, 2005 among XTO Energy Inc. and the security holders of Antero Resources Corporation (incorporated by reference to Exhibit 4.1 to Form 10-Q for the quarter ended June 30, 2005)

Indenture for Senior Debt Securities dated as of July 19, 2007 between the Company and the Bank of New York Trust Company, N.A., as Trustee (incorporated by reference to Exhibit 4.3.1 to Form 8-K filed July 16, 2007)

First Supplemental Indenture dated as of July 19, 2007 between the Company and the Bank of New York Trust Company, N.A., as Trustee for 5.90% Senior Notes due 2012, 6.25% Senior Notes due 2017 and 6.75% Senior Notes due 2037 (incorporated by reference to Exhibit 4.3.2 to Form 8-K filed July 16, 2007)

Amended and Restated Employment Agreement between the Company and Bob R. Simpson, dated May 17, 2000 (incorporated by reference to Exhibit 10.2 to Form 10-Q for the quarter ended June 30, 2000)

Amendment to Amended and Restated Employment Agreement between the Company and Bob R. Simpson, dated August 20, 2002 (incorporated by reference to Exhibit 10.1 to Form 10-Q for the quarter ended September 30, 2002)

Employment Agreement between the Company and Bob R. Simpson, dated May 16, 2006 (incorporated by reference to Exhibit 10.2 to Form 10-Q for the quarter ended June 30, 2006)

Amendment to Employment Agreement between XTO Energy Inc. and Bob R. Simpson, dated December 31, 2007 (incorporated by reference to Exhibit 10.1 to Form 8-K filed January 7, 2008)

Employment Agreement between the Company and Keith A. Hutton, dated May 16, 2006 (incorporated by reference to Exhibit 10.3 to Form 10-Q for the quarter ended June 30, 2006)

Employment Agreement between the Company and Vaughn O. Vennerberg II, dated May 16, 2006 (incorporated by reference to Exhibit 10.4 to Form 10-Q for the quarter ended June 30, 2006)

Amended and Restated Employment Agreement between the Company and Steffen E. Palko, dated May 17, 2000 (incorporated by reference to Exhibit 10.3 to Form 10-Q for the quarter ended June 30, 2000)

Amendment to Amended and Restated Employment Agreement between the Company and Steffen E. Palko, dated August 20, 2002 (incorporated by reference to Exhibit 10.2 to Form 10-Q for the quarter ended September 30, 2002)

1998 Stock Incentive Plan, as amended March 17, 2004 (incorporated by reference to Exhibit 10.1 to Form 10-Q for the quarter ended March 31, 2004)

XTO Energy Inc. Amended and Restated 2004 Stock Incentive Plan (incorporated by reference to Appendix B to the Proxy Statement dated April 13, 2006 for the Annual Meeting of Stockholders held May 16, 2006)

XTO Energy Inc. Amended and Restated 2004 Stock Incentive Plan (as amended and restated through November 21, 2006) (incorporated by reference to Exhibit to 10.10 to Form 10-K for the year ended December 31, 2006)

Form of Nonqualified Stock Option Agreement for Employees under the 2004 Stock Incentive Plan (incorporated by reference to Exhibit 10.2 to Form 8-K filed November 22, 2004)

Form of Nonqualified Stock Option Agreement for Employees with Employment Agreements under the Amended and Restated 2004 Stock Incentive Plan (incorporated by reference to Exhibit 10.4 to Form 10-Q for the quarter ended September 30, 2006)

Form of Stock Award Agreement for Employees under the 2004 Stock Incentive Plan (incorporated by reference to Exhibit 10.3 to Form 8-K filed November 22, 2004)

Form of Nonqualified Stock Option Agreement for Non-Employee Directors under the 2004 Stock Incentive Plan (incorporated by reference to Exhibit 10.4 to Form 8-K filed November 22, 2004)

Form of Stock Award Agreement for Non-Employee Directors under the 2004 Stock Incentive Plan (incorporated by reference to Exhibit 10.5 to Form 8-K filed November 22, 2004)

Form of Stock Grant Agreement for Non-Employee Directors under Section 11 of the 2004 Stock Incentive Plan (incorporated by reference to Exhibit 10.1 to Form 8-K filed February 22, 2005)

Form of Stock Grant Agreement (With Restrictions) for Non-Employee Directors under Section 11 of the 2004 Stock Incentive Plan

Amended Employee Severance Protection Plan, as amended February 15, 2000 (incorporated by reference to Exhibit 10.14 to Form 10-K for the year ended December 31, 1999)

Amendment to Amended Employee Severance Protection Plan, as amended August 20, 2002 (incorporated by reference to Exhibit 10.5 to Form 10-Q for the quarter ended September 30, 2002)

Second Amended and Restated Employee Severance Protection Plan, as amended August 15, 2006 (incorporated by reference to Exhibit 10.1 to Form 10-Q for the quarter ended September 30, 2006)

Amended and Restated Management Group Employee Severance Protection Plan, as amended February 15, 2000 (incorporated by reference to Exhibit 10.13 to Form 10-K for the year ended December 31, 1999)

Amendment to Amended and Restated Management Group Employee Severance Protection Plan, as amended August 20, 2002 (incorporated by reference to Exhibit 10.4 to Form 10-Q for the quarter ended September 30, 2002)

Second Amended and Restated Management Group Employee Severance Protection Plan, as amended August 15, 2006 (incorporated by reference to Exhibit 10.2 to Form 10-Q for the quarter ended September 30, 2006)

Outside Directors Severance Plan dated August 20, 2002 (incorporated by reference to Exhibit 10.6 to Form 10-Q for the quarter ended September 30, 2002)

Amended and Restated Outside Directors Severance Plan, as amended August 15, 2006 (incorporated by reference to Exhibit 10.3 to Form 10-Q for the quarter ended September 30, 2006)

Form of Amended and Restated Agreement (relating to change in control) between the Company and Bob R. Simpson, Steffen E. Palko, Louis G. Baldwin, Keith A. Hutton and Vaughn O. Vennerberg II, dated October 15, 2004 (incorporated by reference to Exhibit 10.1 to Form 8-K filed October 21, 2004)

Form of Amendment No. One to Amended and Restated Agreement (relating to change in control) between the Company and Bob R. Simpson, Louis G. Baldwin, Keith A. Hutton and Vaughn O. Vennerberg, dated November 21, 2006 (incorporated by reference to Exhibit to 10.26 to Form 10-K for the year ended December 31, 2006)

Amendment Number Two to Amended and Restated Agreement (relating to change in control) between XTO Energy Inc. and Bob R. Simpson, dated December 31, 2007 (incorporated by reference to Exhibit 10.2 to Form 8-K filed January 7, 2008)

Agreement (relating to change in control) between the Company and Timothy L Petrus, dated November 21, 2006 (incorporated by reference to Exhibit 10.27 to Form 10-K for the year ended December 31, 2006)

Consulting and Non-Competition Agreement dated April 1, 2005 between the Company and Steffen E. Palko (incorporated by reference to Exhibit 10.1 to Form 8-K filed April 5, 2005)

Form of Indemnification Agreement dated November 15, 2005 between the Company and each director, executive officer and certain other officers (incorporated by reference to Exhibit 10.1 to Form 8-K filed November 18, 2005)

Form of Stock Award Agreement (Restricted Shares) for Employees under the 2004 Stock Incentive Plan (incorporated by reference to Exhibit 10.30 to Form 10-K for the year ended December 31, 2006)

Description of Matching Charitable Contribution Program for officers and directors

Amended and Restated 5-Year Revolving Credit Agreement dated April 1, 2005 between the Company and certain commercial banks named therein (incorporated by reference to Exhibit 10.3 to Form 10-Q for the quarter ended March 31, 2005)

First Amendment to Five-Year Revolving Credit Agreement dated March 10, 2006 between the Company and certain commercial banks named therein (incorporated by reference to Exhibit 10.1 to Form 10-Q for the quarter ended March 31, 2006)

Second Amendment to Five-Year Revolving Credit Agreement dated October 25, 2006 between the Company and certain commercial banks named therein (incorporated by reference to Exhibit 10.5 to Form 10-Q for the quarter ended September 30, 2006)

Third Amendment to 5-Year Revolving Credit Agreement dated March 19, 2007 between the Company and certain commercial banks named therein (incorporated by reference to Exhibit 10.1 to Form 8-K filed March 23, 2007)

Fourth Amendment to 5-Year Revolving Credit Agreement dated February 6, 2008 between the Company and certain commercial banks named therein

Term Loan Credit Agreement dated November 10, 2004 between the Company and certain commercial banks named therein (incorporated by reference to Exhibit 10.20 to Form S-4 dated December 13, 2004)

First Amendment to Term Loan Agreement dated April 1, 2005 between the Company and certain banks named therein (incorporated by reference to Exhibit 10.4 to Form 10-Q for the quarter ended March 31, 2005)

Second Amendment to Term Loan Agreement dated March 10, 2006 between the Company and certain commercial banks named therein (incorporated by reference to Exhibit 10.2 to Form 10-Q for the quarter ended March 31, 2006)

Third Amendment to Term Loan Agreement dated March 19, 2007 between the Company and certain banks named therein (incorporated by reference to Exhibit 10.2 to Form 8-K filed March 23, 2007)

Fourth Amendment to Term Loan Agreement dated February 6, 2008 between the Company and certain banks named therein

Form of Commercial Paper Dealer Agreement dated October 27, 2006 between the Company and each of Lehman Brothers Inc., Citigroup Global Markets Inc., Goldman, Sachs & Co. and JPMorgan Securities Inc. (incorporated by reference to Exhibit 10.1 to Form 8-K filed November 2, 2006)

Issuing and Paying Agency Agreement dated October 27, 2006 between the Company and JPMorgan Chase bank, National Association (incorporated by reference to Exhibit 10.2 to Form 8-K filed November 2, 2006)

Firm Intrastate Gas Transportation Agreement dated July 1, 2005 between the Company, XTO Resources I, LP and Energy Transfer Fuel, LP (incorporated by reference to Exhibit 10.1 to Form 10-Q for the quarter ended September 30, 2005) (Material has been omitted from this Exhibit pursuant to an order of confidential treatment and the omitted material has been separately filed with the Securities and Exchange Commission.)

Computation of Ratio of Earnings to Fixed Charges

Subsidiaries of XTO Energy Inc.

Consent of KPMG LLP

Consent of Miller and Lents, Ltd.

Chief Executive Officer Certification required by Rule 13a-14(a)/15d-14(a) of the Securities Exchange Act of 1934

Chief Financial Officer Certification required by Rule 13a-14(a)/15d-14(a) of the Securities Exchange Act of 1934

Chief Executive Officer and Chief Financial Officer Certification pursuant to 18 U.S.C. Section 1350, as adopted pursuant to Section 906 of the Sarbanes-Oxley Act of 2002