Alliant Energy Corporation

Alliant Energy is the parent company of two public utility companies - Interstate Power and Light Company and Wisconsin Power and Light Company - and of Alliant Energy Finance, LLC, the parent company of Alliant Energy’s non-utility operations. Alliant Energy, whose core purpose is to serve customers and build stronger communities, is an energy-services provider with utility subsidiaries serving approximately 1,015,000 electric and 435,000 natural gas customers. Providing its customers in the Midwest with regulated electricity and natural gas service is the Company’s primary focus. Alliant Energy, headquartered in Madison, Wisconsin, is a component of the S&P 500 and is traded on the Nasdaq Global Select Market under the symbol LNT. For more information, visit the Company’s website at www.alliantenergy.com.

Current securities

1. 10-Q filingOct 30, 2026
2. Results of Operations and Financial ConditionOct 30, 2026
3. Entry into a Material Definitive Agreement · Creation of a Direct Financial Obligation or an Obligation under an Off-Balance Sheet ArrangementOct 28, 2026
4. Other EventsAug 21, 2026
5. Results of Operations and Financial ConditionJul 31, 2026