Form Type:  25-NSE
Filing Date:  6/28/2010 
CIK:  0000868809 
Address:  810 HOUSTON ST
STE 2000
City, State, Zip:  FORT WORTH, Texas 76102 
Telephone:  (817) 870-2800 
Fiscal Year:  12/31 
Description of Business
XTO Energy Inc. and its subsidiaries ("the Company") are engaged in the acquisition, development, exploitation and exploration of both producing oil and gas properties and unproved properties, and in the production, processing, marketing and transportation of oil and natural gas. The Company was formerly known as Cross Timbers Oil Company and changed its name to XTO Energy Inc. in June 2001. On December 13, 2009, we entered into a definitive merger agreement with Exxon Mobil Corporation under which we would become a wholly owned subsidiary of ExxonMobil. As a result of the merger, each outstanding share of our common stock will be converted into 0.7098 shares of ExxonMobil common stock. Completion of the merger remains subject to certain conditions, including the adoption of the merger agreement by our stockholders, as well as certain governmental and regulatory approvals.
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  EXHIBIT 99.25