Exhibit 99.1

[XTO Logo Here]

NEWS RELEASE

For Immediate Release

Number: 10-03

XTO ENERGY ANNOUNCES EARNINGS, PRODUCTION AND CASH FLOW FOR 4Q;

REPORTS RECORD EARNINGS, PRODUCTION AND CASH FLOW FOR 2009

FORT WORTH, TX (February 17, 2010) – XTO Energy Inc. (NYSE-XTO) today reported record production for fourth quarter 2009 of 2.88 billion cubic feet equivalent (Bcfe) per day, up 9% from the fourth quarter 2008 level of 2.64 Bcfe per day. Total revenues for the fourth quarter were a record $2.34 billion, a 19% increase from $1.96 billion the prior year. Earnings for the quarter were $537 million, or $0.92 per share ($0.92 diluted), a 53% increase from fourth quarter 2008 earnings of $351 million, or $0.61 per share ($0.61 diluted). After adjusting for an $8 million ($5 million after tax) non-cash derivative fair value loss, adjusted earnings for fourth quarter 2009 were $542 million, or $0.93 per share ($0.93 diluted). Fourth quarter 2008 adjusted earnings were $393 million, or $0.68 per share ($0.68 diluted).¹

Operating income for the quarter was $989 million, a 39% increase from fourth quarter 2008 operating income of $709 million. Operating cash flow was a record $1.69 billion, up 28% from 2008 fourth quarter comparable operating cash flow of $1.32 billion.¹

Fourth quarter daily gas production averaged 2.37 billion cubic feet (Bcf), up 9% from fourth quarter 2008 daily production of 2.17 Bcf. Daily oil production for the fourth quarter was 64.6 thousand barrels, a 2% increase from the fourth quarter 2008 level of 63.5 thousand barrels. During the fourth quarter, natural gas liquids production was 21.2 thousand barrels per day, a 37% increase from the fourth quarter 2008 rate of 15.4 thousand barrels per day.

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XTO Energy Announces Earnings, Production and Cash Flow for 4Q;

Reports Record Earnings, Production and Cash Flow for 2009

The average realized gas price for the quarter was $7.29 per thousand cubic feet (Mcf), 7% higher than the fourth quarter 2008 average price of $6.79 per Mcf. The fourth quarter average oil price increased 30% to $110.85 per barrel from the fourth quarter 2008 average price of $85.19 per barrel. Natural gas liquids prices averaged $39.07 per barrel for the quarter, a 33% increase from the 2008 fourth quarter average price of $29.46.

For the year, the Company reported record earnings of $2.02 billion, or $3.48 per share ($3.46 diluted), compared with earnings of $1.91 billion, or $3.58 per share ($3.54 diluted) for 2008. After adjusting for a $130 million ($83 million after tax) non-cash derivative fair value loss and a $17 million ($11 million after tax) gain on extinguishment of debt, 2009 adjusted earnings were $2.09 billion, or $3.60 per share ($3.58 diluted) compared to 2008 adjusted earnings of $1.95 billion, or $3.64 per share ($3.60 diluted).¹ Operating cash flow in 2009 was a record $6.25 billion, up 22% from the prior year level of $5.13 billion.¹ Total revenues for 2009 were a record $9.06 billion, an 18% increase from revenues of $7.70 billion for 2008. Operating income for the year was $3.69 billion, a 5% increase from $3.51 billion for 2008.

Gas production for the year was a record 2.34 Bcf per day, up 23% from 2008 daily production of 1.91 Bcf. Oil production for 2009 was a record 66.3 thousand barrels per day, an 18% increase from 2008 production of 56.0 thousand barrels per day. Natural gas liquids production for 2009 was a record 20.6 thousand barrels per day, a 32% increase from 2008 production of 15.6 thousand barrels per day.

The average realized gas price for 2009 was $7.13 per Mcf, 9% lower than the 2008 average price of $7.81 per Mcf. The average oil price for the year was $107.65 per barrel, a 23% increase from the 2008 average price of $87.59 per barrel. Natural gas liquids averaged $30.03 per barrel, or 38% lower than the 2008 average of $48.76 per barrel.

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XTO Energy Announces Earnings, Production and Cash Flow for 4Q;

Reports Record Earnings, Production and Cash Flow for 2009

XTO Energy Inc. is a domestic energy producer engaged in the acquisition, development and discovery of quality, long-lived oil and natural gas properties in the United States.

Statements made in this news release may include forward-looking statements within the meaning of Section 27A of the Securities Act of 1933 and Section 21E of the Securities Exchange Act of 1934. These statements are based on assumptions and estimates that management believes are reasonable based on currently available information; however, management’s assumptions and the Company’s future performance are both subject to a wide range of business risks and uncertainties and there is no assurance that these goals and projections can or will be met. Any number of factors could cause actual results to differ materially from those in the forward-looking statements. The Company undertakes no obligation to publicly update or revise any forward-looking statements. Further information on risks and uncertainties is available in the Company’s filings with the Securities and Exchange Commission, which are incorporated by this reference as though fully set forth herein.

XTO ENERGY INC.

Consolidated Income Statements

XTO ENERGY INC.

Consolidated Statements of Cash Flows

XTO ENERGY INC.

Consolidated Balance Sheets

XTO ENERGY INC. (continued)

XTO ENERGY INC. (continued)

Effective January 1, 2009, we adopted the authoritative guidance for earnings per share as it relates to determining whether instruments granted in share-based payment transactions are participating securities. As a result of adoption, we retrospectively adjusted the calculation of our 2008 earnings per share on a basis consistent with 2009. The previously reported earnings per share for fourth quarter 2008 were $0.61 basic and $0.61 diluted and for the year 2008 were $3.60 basic and $3.56 diluted.

Realized gains and losses on non-hedge derivatives and on the ineffective portion of hedge derivatives are recorded as a component of derivative fair value (gain) loss (see (d) above). These non-hedge and ineffective derivative gains and losses are primarily related to certain of our crude oil swap agreements that did not qualify for hedge accounting, and the timing of entering basis swap agreements and designating them as hedges associated with NYMEX swaps. Had realized non-hedge and ineffective gains and losses, attributable to fourth quarter and year-end production, been recorded as gas, natural gas liquids and oil revenue, the average gas, natural gas liquids and oil prices would have been:

XTO ENERGY INC. (continued)

Non-GAAP Financial Measures

Adjusted Earnings

Adjusted earnings, a non-GAAP financial measure, excludes certain items that management believes affect the comparability of operating results. The Company discloses adjusted earnings as a useful adjunct to GAAP net income because:

The following reconciles GAAP net income to adjusted earnings:

Operating Cash Flow

Operating cash flow, a non-GAAP financial measure, is defined as cash provided by operating activities before changes in operating assets and liabilities, exploration expense and significant cash flow effects of earnings adjustments. Because of these adjustments, this cash flow statistic is different from cash provided by operating activities, as disclosed under GAAP. Management believes operating cash flow is a better liquidity indicator for oil and gas producers because of the adjustments made to cash provided by operating activities, explained as follows:

Management uses operating cash flow not only for measuring the Company’s cash flow and liquidity, but also in evaluating the Company against other oil and gas producing companies and valuing potential producing property acquisitions.

XTO ENERGY INC. (continued)

Non-GAAP Financial Measures

The following reconciles cash provided by operating activities, the GAAP cash flow measure, to operating cash flow:

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