Alliant Energy Corporation (NASDAQ: LNT; LSE: 0HCT) is a public utility holding company that provides regulated electric and natural gas services to approximately 1 million electric and 430,000 natural gas retail customers across Iowa and Wisconsin. Headquartered in Madison, Wisconsin, and founded in 1981 through mergers tracing back to 1917, the company operates primarily through subsidiaries Interstate Power and Light Company, serving Iowa with electricity generation, transmission, and distribution alongside natural gas distribution and transportation, and Wisconsin Power and Light Company, delivering similar services in southern and central Wisconsin; it also maintains a minority interest in American Transmission Co. and offers non-regulated services via Travero, Inc., including logistics brokerage, trucking, rail, transloading, and warehousing. Alliant Energy's generation portfolio features a balanced mix of wind, solar, hydropower, natural gas, coal, and energy storage, with a long-term plan targeting net-zero greenhouse gas emissions from utility operations by 2050. In recent developments, the company has secured multiple data center agreements totaling 3 gigawatts of contracted demand, including a significant electric service agreement for 900 megawatts at the QTS Madison site and a $10 billion partnership with QTS, driving expectations of 50% peak energy demand growth by 2030; it increased its capital expenditure plan to $11.5 billion through 2028, with over 40% allocated to renewables like wind, solar, and storage, alongside grid strengthening, and narrowed 2025 ongoing earnings guidance to $3.17-$3.23 per share while announcing 2026 guidance.