Atlas Resource Partners, L.P. (NYSE: ARP) (“ARP” or “the Company”) announced today the completion of its previously announced acquisition of natural gas assets from EP Energy E&P Company, L.P. (“EP Energy”) for $733 million, as adjusted pursuant to the purchase agreement. The acquired assets include 466 Bcf of natural gas proved reserves primarily in the Raton (New Mexico) and Black Warrior (Alabama) Basins. ARP financed a portion of the EP Energy transaction with $400 million in equity, including $313 million through a public offering of newly issued common units and $87 million of Class C convertible preferred units purchased by Atlas Energy, L.P. (“ATLS”). In addition, ARP financed a portion of the transaction with a $250 million offering of senior unsecured notes maturing in 2021, and the remainder of the transaction was funded with ARP’s revolving credit facility. As a result of the closing of the EP Energy acquisition, ARP’s borrowing base on its revolving credit facility has been increased from $430 million to $835 million. Deutsche Bank Securities acted as financial advisor, and Wachtell, Lipton, Rosen & Katz and Ledgewood (Philadelphia) acted as legal advisors, on the transaction. Atlas Resource Partners, L.P. (NYSE: ARP) is an exploration & production master limited partnership which owns an interest in over 12,000 producing natural gas and oil wells, located primarily in Appalachia, the Barnett Shale (TX), the Raton Basin (NM) and Black Warrior Basin (AL). ARP is also the largest sponsor of natural gas and oil investment partnerships in the U.S. For more information, please visit our website at www.atlasresourcepartners.com, or contact Investor Relations at InvestorRelations@atlasenergy.com. Atlas Energy, L.P. (NYSE: ATLS) is a master limited partnership which owns all of the general partner Class A units and incentive distribution rights and an approximate 37% limited partner interest in its upstream oil & gas subsidiary, Atlas Resource Partners, L.P. Additionally, Atlas Energy owns and operates the general partner of its midstream oil & gas subsidiary, Atlas Pipeline Partners, L.P., through all of the general partner interest, all the incentive distribution rights and an approximate 6% limited partner interest. For more information, please visit our website at www.atlasenergy.com, or contact Investor Relations at InvestorRelations@atlasenergy.com. Cautionary Note Regarding Forward-Looking Statements This document contains forward-looking statements that involve a number of assumptions, risks and uncertainties that could cause actual results to differ materially from those contained in the forward-looking statements. ARP cautions readers that any forward-looking information is not a guarantee of future performance. Such forward-looking statements include, but are not limited to, statements about future financial and operating results, resource potential, ARP’s plans, objectives, expectations and intentions and other statements that are not historical facts. Risks, assumptions and uncertainties that could cause actual results to materially differ from the forward-looking statements include, but are not limited to, those associated with general economic and business conditions; ARP’s ability to realize the anticipated benefits of the acquisition; changes in commodity prices; changes in the costs and results of drilling operations; uncertainties about estimates of reserves and resource potential; inability to obtain capital needed for operations; ARP’s level of indebtedness; changes in government environmental policies and other environmental risks; the availability of drilling equipment and the timing of production; tax consequences of business transactions; and other risks, assumptions and uncertainties detailed from time to time in ARP’s reports filed with the U.S. Securities and Exchange Commission, including quarterly reports on Form 10-Q, reports on Form 8-K and annual reports on Form 10-K. Forward-looking statements speak only as of the date hereof, and ARP assumes no obligation to update such statements, except as may be required by applicable law.