Alliant Energy(LNT) - 2025 Q2 - Quarterly Results

Exhibit 99.1 Alliant Energy Corporation Corporate Headquarters 4902 North Biltmore Lane Madison, WI 53718-2148 www.alliantenergy.com News Release FOR IMMEDIATE RELEASE Media Hotline: (608) 458-4040 Investor Relations: Susan Gille (608) 458-3956 ALLIANT ENERGY ANNOUNCES SECOND QUARTER 2025 RESULTS MADISON, Wis. - August 7, 2025 - Alliant Energy Corporation (NASDAQ: LNT) today announced U.S. generally accepted accounting principles (GAAP) consolidated and non-GAAP consolidated unaudited earnings per share (EP ...