mge energy, inc., through its subsidiaries, operates as a public utility holding company primarily in wisconsin. it operates through five segments: regulated electric utility operations; regulated gas utility operations; nonregulated energy operations; transmission investments; and all other. the company generates, purchases, and distributes electricity; owns or leases electric generation facilities located in wisconsin and iowa; and plans, constructs, operates, maintains, and expands transmission facilities to provide transmission services. it also generates electricity from coal, natural gas, and renewable energy sources, as well as purchases power under short and long-term commitments. as of february 26, 2020, the company distributed electricity to 155,000 customers in dane county, wisconsin; and purchased and distributed natural gas to 163,000 customers in seven south-central and western wisconsin counties. mge energy, inc. was founded in 1855 and is headquartered in madison, wisco