October 29, 2008

Atlas Energy Resources, LLC to Report Financial Results for the Third Quarter 2008 and to Host Earnings Conference Call

Atlas Energy Resources, LLC (NYSE:ATN) announced today that it will release its results for the third quarter 2008 on Monday, November 3, 2008 before market hours, and invites investors and other interested parties to listen to the live webcast of its quarterly conference call on Monday, November 3, 2008, at 2:00 p.m. Eastern Time.

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.atlasenergyresources.com. For those unavailable to listen to the live broadcast, the replay of the webcast will be available following the live call on the Atlas Energy Resources website and telephonically beginning at 4:00 p.m. ET on November 3, 2008 by dialing 888-286-8010, passcode: 51968803.

Atlas Energy Resources, LLC develops and produces domestic natural gas and to a lesser extent, oil. Atlas Energy is one of the largest independent energy producers in the Appalachian Basin and Michigan's Antrim Shale. The Company sponsors and manages tax-advantaged investment partnerships, in which it co-invests, to finance the exploration and development of the Company's acreage in the Appalachian Basin. Atlas Energy is active principally in Pennsylvania, Michigan and Tennessee. For more information, visit Atlas Energy's website at www.atlasenergyresources.com or contact investor relations at [email protected]