Alliant Energy is a regulated utility company providing electric and natural gas services to approximately 1 million electric customers and 430,000 natural gas customers across Iowa and Wisconsin. The company operates through two subsidiaries—Interstate Power and Light Company (IPL) and Wisconsin Power and Light Company (WPL)—and generates electricity from a balanced mix of wind, solar, hydropower, natural gas, coal, and energy storage., Alliant Energy is a regulated utility company providing electric and natural gas services to approximately 1 million electric customers and 430,000 natural gas customers across Iowa and Wisconsin. The company operates through two subsidiaries—Interstate Power and Light Company (IPL) and Wisconsin Power and Light Company (WPL)—and generates electricity from a balanced mix of wind, solar, hydropower, natural gas, coal, and energy storage.