Atlas Energy Resources, LLC to Present at the Enercom Oil and Gas Conference.

PITTSBURGH -- Atlas Energy Resources, LLC (NYSE: ATN) ("Atlas Energy" or "the Company") announces today that Atlas Energy will be presenting at the Enercom Oil and Gas Conference on Thursday, August 13th in Denver, CO. Edward Cohen, Chairman and Chief Executive Officer, will be presenting for Atlas Energy at 3:55 p.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 is one of the largest independent natural gas producers in the Appalachian and Michigan Basins. The Company is also the country's largest sponsor and manager of tax-advantaged energy investment partnerships that finance the exploration and development of the Company's acreage. For more information, visit Atlas Energy's website at www.atlasenergyresources.com or contact investor relations at [e-mail].