Atlas Energy, L.P. (NYSE: ATLS) announces today that it will release results for the first quarter 2012 on Monday, May 7, 2012 after market hours, and invites investors and other interested parties to listen to the live webcast of its quarterly conference call on Tuesday, May 8, 2012, at 9:00am ET. This call is being webcast live and can be accessed by investors and other interested parties from the Investor Relations section of Atlas Energy’s website at www.atlasenergy.com. For those unavailable to listen to the live broadcast, the replay of the webcast will be available following the live call on the website and telephonically beginning at 11:00a.m. ET on May 8, 2012 by dialing 888-286-8010, passcode: 75755395. Atlas Energy, L.P. (NYSE: ATLS) is a master limited partnership which owns all of the general partner interest and approximately 78% of the limited partner interests 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 which it owns a 2% general partner interest, all the incentive distribution rights and an approximate 11% limited partner interest. For more information, please visit our website at www.atlasenergy.com, or contact Investor Relations at InvestorRelations@atlasenergy.com.