Integrys Energy Group, Inc. Declares Dividend on Common Stock

Chicago – July 12, 2011 – The Board of Directors of Integrys Energy Group, Inc. (NYSE: TEG) has declared a quarterly dividend of $0.68 per share on common stock, payable on September 20, 2011, to shareholders of record August 31, 2011. Integrys Energy Group has paid a dividend to its shareholders for 71 consecutive years.

About Integrys Energy Group, Inc.: Integrys Energy Group is a diversified holding company with regulated utility operations operating through six wholly owned subsidiaries, Wisconsin Public Service Corporation, The Peoples Gas Light and Coke Company, North Shore Gas Company, Upper Peninsula Power Company, Michigan Gas Utilities Corporation, and Minnesota Energy Resources Corporation; nonregulated operations through its wholly owned nonregulated subsidiary, Integrys Energy Services; and also a 34% equity ownership interest in American Transmission Company LLC (an electric transmission company operating in Wisconsin, Michigan, Minnesota, and Illinois).

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