Page 1

Alliant Energy Corporation Supplemental Information February 19 , 2021 Earnings Call Forward Looking Statements Alliant Energy The information regarding forecasted earnings per share , forecasted generation additions , forecasted effective income tax rates , and regulatory plans contain forward - looking statements . Actual results could differ materially because the realization of those results is subject to many uncertainties , including : the state of the economy in the service territories of IPL and WPL ; state and federal legislation and regulatory actions ; weather ; and other factors discussed in more detail in Alliant Energy Corporation's earnings release dated February 18 , 2021 and in Alliant Energy's SEC filings . Alliant Energy cannot provide any assurance that the assumptions used in the forward - looking statements or otherwise are accurate or will prove to be correct . All forward - looking statements included in this presentation are based upon information presently available , and Alliant Energy assumes no obligation to update any forward - looking statements . Supplemental Slides to 2020 Earnings Call – February 19 , 2021 - 1