Integrys Energy Group Declares Special Pro Rata Dividend Of $0.68

In preparation for the potential closing of the merger of Integrys Energy Group

with Wisconsin Energy Corporation

prior to the next Integrys Energy Group common stock dividend record date, and in accordance with the merger agreement, the Board of Directors of Integrys Energy Group today declared a special pro rata dividend to ensure that its shareholders continue to receive their dividend at the current rate until the closing of the merger. The Board of Directors declared a pro rata dividend of $0.007234 per share per day that will accrue from May 30, 2015 (the date immediately following the prior Integrys Energy Group record date), until and including the day prior to the effective day of the merger. This pro rata dividend, which is the daily equivalent of the current quarterly dividend rate of $0.68 per share, will be paid to Integrys Energy Group shareholders of record at the close of business on the day immediately prior to the effective date of the merger. The dividend will be paid as soon as practicable following the completion of the merger. The effective date of the merger is not currently known, but is expected to occur by the end of this summer. The pro rata dividend declaration is contingent upon the completion of the merger prior to the next regularly scheduled dividend record date for Integrys Energy Group, which is August 31, 2015. Therefore, the pro rata dividend is contingent on the merger being completed on or before August 31, 2015. As previously announced, it is intended that the quarterly dividend of the combined company (which will be called WEC Energy Group) will be $0.4575 per share, bringing Integrys and Wisconsin Energy shareholders to dividend parity per the merger agreement.