MGE Energy, Inc. (MGE Energy) is a holding company and conducts all of its business operations through its subsidiaries. Madison Gas and Electric Company (MGE) is a wholly owned subsidiary of MGE Energy. The Company operates in five segments: Regulated electric utility operations, which is engaged in generating, purchasing, and distributing electricity through MGE; Regulated gas utility operations, which is engaged in purchasing and distributing natural gas through MGE; Nonregulated energy operations, which is engaged in constructing, owning, and leasing electric generating capacity that assists MGE through MGE Energy's wholly owned subsidiaries MGE Power Elm Road and MGE Power West Campus; Transmission investments, which is representing its investment in American Transmission Company LLC, and All other, which is investing in companies and property that relate to the regulated operations and financing the regulated operations.