Alliant Energy(LNT) - 2024 Q3 - Quarterly Results

Exhibit 99.1 Alliant Energy Corporation Corporate Headquarters 4902 North Biltmore Lane Madison, WI 53718-2148 www.alliantenergy.com News Release Media Hotline:(608) 458-4040 Investor Relations: Susan Gille (608) 458-3956 FOR IMMEDIATE RELEASE ALLIANT ENERGY ANNOUNCES THIRD QUARTER 2024 RESULTS • Third quarter GAAP earnings per share was $1.15 in 2024, compared to$1.02 in 2023 • 2024 earnings guidance narrowed to a range of $2.99 -$3.06 per share • Provided 2025 earnings guidance range of $3.15 -$3.25 pe ...