The current institutional shareholding score of Alliant Energy Corp is 7.00, ranking 18 out of 63 in the Electric Utilities & IPPs industry. The latest institutional shareholding proportion is 83.81%, representing a quarter-over-quarter decrease of 5.80%. The largest institutional shareholder is Mairs and Power, holding a total of 2.79M shares, representing 1.12% of shares outstanding, with 4.92% decrease in holdings.