ALLETE, Inc. operates as an energy company. The company operates through Regulated Operations, and Investments and Other segments. It generates electricity from coal-fired, hydro, wind, and biomass co-fired facilities. The company provides regulated electric, natural gas, and water services in northwestern Wisconsin to approximately 15,000 electric customers, 12,000 natural gas customers, and 10,000 water customers, as well as regulated utility electric service in northeastern Minnesota to approximately 144,000 retail customers and 16 non-affiliated municipal customers. It also owns and maintains electric transmission assets in Wisconsin, Michigan, Minnesota, and Illinois. The company owns and operates 174 substations with a capacity of 10,651 megavolt amperes. In addition, it is involved in the coal mining operations in North Dakota; and real estate investment activities in Florida. Further, the company offers seller financing; and holds approximately 5,000 acres of land in Minnesota. It serves industrial clients that comprise taconite mining, iron concentrate, paper, pulp and wood products, and pipeline industries. The company was founded in 1906 and is headquartered in Duluth, Minnesota.