Xcel Energy Inc. operates in the Electric and other services combined sector. Xcel Energy Inc. (Xcel Energy) is a holding company with subsidiaries engaged in the utility business. During the year ended December 31, 2010, Xcel Energy's operations included the activity of four wholly owned utility subsidiaries that serve electric and natural gas to customers in eight states, which includes Northern States Power Company (NSP-Minnesota), Northern States Power Company (NSP-Wisconsin), Public Service Company (PSCo) and Southwestern Public Service Co. (SPS). These utilities serve customers in portions of Colorado, Michigan, Minnesota, New Mexico, North Dakota, South Dakota, Texas and Wisconsin. Along with WYCO Development LLC (WYCO), a joint venture formed with Colorado Interstate Gas Company, to develop and lease natural gas pipeline, storage, and compression facilities, and WestGas InterState, Inc., an interstate natural gas pipeline company. It operates three segments: regulated electric utility, regulated natural gas utility and all other. In our complete report available for purchase the company is compared to: Public Service Enterprise Group Inc., Pepco Holdings, Inc. and Consolidated Edison, Inc..