Alliant Energy Corporation is a public utility holding company that provides regulated electricity and natural gas service to approximately 975,000 electric and 420,000 natural gas customers across Iowa and Wisconsin. The company's utility operations serve customers in the Midwest region of the United States. Alliant Energy's non-regulated operations include its subsidiary, Alliant Energy Transportation, which provides transportation services to the company's regulated utilities, and its subsidiary, Alliant Energy Resources, which owns and operates a portfolio of non-regulated businesses, including the generation and sale of electric power and the provision of energy-related products and services to wholesale and retail customers.