Atmos Energy Corporation (NYSE: ATO) will host a conference call on Thursday, August 9, 2012, at 10:00 a.m. Eastern to review the company’s fiscal 2012 third quarter financial results. Atmos Energy will release these results on Wednesday, August 8, 2012, following the market close. To listen to the conference call, dial 877-485-3107. You may also listen to the call on the Atmos Energy website at www.atmosenergy.com. The Internet broadcast will be archived for 30 days. Fiscal 2012 Third Quarter Earnings Conference Call August 9, 2012 10:00 a.m. Eastern / 9:00 a.m. Central Toll-free: 877- 485 - 3107 (No pass code) Internet Webcast: www.atmosenergy.com Atmos Energy Corporation, headquartered in Dallas, is one of the country’s largest natural gas-only distributors, serving over three million natural gas distribution customers in more than 1,600 communities in 12 states from the Blue Ridge Mountains in the East to the Rocky Mountains in the West. Atmos Energy also provides natural gas marketing and procurement services to industrial, commercial and municipal customers primarily in the Midwest and Southeast and manages company-owned natural gas pipeline and storage assets, including one of the largest intrastate natural gas pipeline systems in Texas. For more information, visit www.atmosenergy.com.