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Integrys Energy Group, Inc. Declares Dividend on Common Stock

CHICAGO, IL--(Marketwired - May 16, 2013) - 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 June 20, 2013, to shareholders of record May 31, 2013. With this payment, Integrys Energy Group will now have paid a dividend to its shareholders for 73 consecutive years.

About Integrys Energy Group, Inc.

Integrys Energy Group is a diversified energy holding company with regulated natural gas and electric utility operations (serving customers in Illinois, Michigan, Minnesota, and Wisconsin), an approximate 34% equity ownership interest in American Transmission Company (a federally regulated electric transmission company), and nonregulated energy operations.

More information about Integrys Energy Group, Inc. is available online at www.integrysgroup.com.