X0305 4 2012-06-05 0000731802 ATMOS ENERGY CORP ATO 0001181021 GREGORY LOUIS P 5430 LBJ FREEWAY 1800 III LINCOLN CENTRE DALLAS TX 75240 1 Sr VP and General Counsel Common Stock 2012-06-05 4 S 0 2500 33.214 D 35187 D Common Stock 10607.017 I By Retirement Savings Plan and Trust The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $33.21 to $33.221, inclusive. The reporting person undertakes to provide to the Company, any security holder of the Company, or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price within the ranges set forth in this footnote to this Form 4. To update end of period holdings as of 5/31/12 under the Atmos Energy Corporation Retirement Savings Plan and Trust. /s/Suzanne Johnson by POA 2012-06-06