Alliant Energy Corp

alliantenergy.com

Alliant Energy Corp (NASDAQ: LNT) is a regulated electric and natural gas utility company that delivers energy to customers through two principal utility subsidiaries: Interstate Power and Light Company, serving Iowa, and Wisconsin Power and Light Company, serving Wisconsin. Revenue is generated through regulated rate structures approved by state utility commissions, meaning Alliant Energy earns a allowed return on its rate base of power generation, transmission, and distribution assets. The combined 10-K filed on 2026-02-20 (accession 000035254126000007) was filed jointly by Alliant Energy Corporation, Interstate Power and Light Company, and Wisconsin Power and Light Company, each as a separate registrant. As a regulated utility, pricing and capital recovery are set by regulatory bodies rather than market competition, giving the business predictable but capped earnings. Alliant Energy is headquartered in the Midwest and operates exclusively in Iowa and Wisconsin based on its subsidiary structure disclosed in the filing.