UIL Holdings Corporation (UIL Holdings) is engaged in the ownership of its operating regulated utility businesses. The utility businesses consist of the electric distribution and transmission operations of The United Illuminating Company (UI) and the natural gas transportation, distribution and sales operations of The Southern Connecticut Gas Company (SCG), a subsidiary of Connecticut Energy Corporation (CEC), Connecticut Natural Gas Corporation (CNG), a subsidiary of CTG Resources, Inc. (CTG), and The Berkshire Gas Company (Berkshire), a subsidiary of Berkshire Energy Resources (BER, and together with SCG, CNG, Berkshire, CEC and CTG, the Gas Companies). CEC, CTG and BER are holding companies whose sole business is ownership of their operating regulated gas utility. UI is also a 50-50 joint venturer with NRG Energy, Inc. (NRG) in GCE Holding LLC, whose wholly owned subsidiary, GenConn Energy LLC (collectively, GenConn), builds and operates new peaking generation plants.