October 3, 2008

Atlas Energy Resources, LLC to Present at IPAA Oil & Gas Investment Symposium

Atlas Energy Resources, LLC (NYSE:ATN) ("The Company") announces today that the Company will be presenting at the IPAA Oil & Gas Investment Symposium on Wednesday, October 8th in San Francisco, CA. Rich Weber, President and Chief Operating Officer, will be presenting for Atlas Energy at 8:00 a.m. Pacific Time / 11:00 a.m. Eastern Time.

Investors and general public are invited to listen to the live webcast of the presentation at www.atlasenergyresources.com under the Event Calendar page of the Investor Relations section of the site.

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 northern Michigan. Atlas Energy 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]