Wisconsin Energy Corporation is a diversified holding company. The Company operates primarily through two segments: a utility energy segment and a non-utility energy segment. The Company’s primary subsidiaries include Wisconsin Electric Power Company (Wisconsin Electric), Wisconsin Gas LLC (Wisconsin Gas) and W.E. Power, LLC (We Power). The Company’s utility energy segment consists of Wisconsin Electric and Wisconsin Gas, operating together under the trade name of We Energies. Its utility energy segment operates in electric utility and natural gas utility. Its non-utility energy segment derives its revenues primarily from the ownership of electric power generating facilities for long-term lease to Wisconsin Electric. As of December 31, 2010, the Company had a 26.2% interest in American Transmission Company LLC (ATC). On January 12, 2011, OC 2 was placed into service and is fully operational.