ALLIANT ENERGY CORP(LNT)

John O. Larsen:Board — Compensation Arrangement | Retiring from executive position on or before January 1, 2025.; Transitioning to non-employee Chairman of the Board of Directors.; Will receive compensation as a non-employee director per the company's proxy statement.; Receives an additional supplemental annual cash retainer of $200,000 for the role of Board Chairman.

Terry L. Kouba: — Retirement/Separation | Announced retirement effective May 1, 2024.; Role at time of retirement: President of Interstate Power and Light Company and Senior Vice President of Alliant Energy Corporation.

Mayuri N. Farlinger — Appointment | Appointed President of Interstate Power and Light Company effective May 1, 2024.; Will continue to serve as Vice President of Alliant Energy and Wisconsin Power and Light Company.; Age 41.; Previously served as Vice President since January 2022.

Christie Raymond — Director Compensation Arrangement | Appointed as a member of the Boards of Directors of Alliant Energy Corporation, Interstate Power and Light Company and Wisconsin Power and Light Company.; Effective date of appointment: April 1, 2024.; Will serve as a member of the Audit Committee and the Compensation and Personnel Committee of each Board.; Will receive compensation as a non-employee director in accordance with the non-employee director compensation practices described in Alliant Energy's Definitive Proxy Statement filed on April 4, 2023, as updated by Exhibit 10.14 to Alliant Energy's Annual Report on Form 10-K filed on February 16, 2024.