| Type | Filed | Filer | Subject | Shares Owned | Percent Owned | |
|---|---|---|---|---|---|---|
| SC 13G/A | 2024-02-13 | VANGUARD GROUP INC | ALLIANT ENERGY CORP | 32,094,212 | 12.6% | EDGAR |
| SC 13G/A | 2024-01-30 | STATE STREET CORP | ALLIANT ENERGY CORP | - | 5.3% | EDGAR |
| SC 13G/A | 2024-01-24 | BlackRock Inc. | ALLIANT ENERGY CORP | 23,143,382 | 9.1% | EDGAR |
| SC 13G/A | 2023-02-09 | VANGUARD GROUP INC | ALLIANT ENERGY CORP | 32,798,266 | 13.1% | EDGAR |
| SC 13G/A | 2023-02-08 | STATE STREET CORP | ALLIANT ENERGY CORP | - | 5.6% | EDGAR |
| SC 13G/A | 2023-01-27 | BlackRock Inc. | ALLIANT ENERGY CORP | 22,703,583 | 9.0% | EDGAR |
| SC 13G/A | 2023-01-25 | BlackRock Inc. | ALLIANT ENERGY CORP | 22,703,583 | 9.0% | EDGAR |
| SC 13G/A | 2022-02-10 | STATE STREET CORP | ALLIANT ENERGY CORP | - | 5.1% | EDGAR |
| SC 13G/A | 2022-02-09 | VANGUARD GROUP INC | ALLIANT ENERGY CORP | 30,687,859 | 12.3% | EDGAR |
| SC 13G/A | 2022-01-27 | BlackRock Inc. | ALLIANT ENERGY CORP | 27,301,825 | 10.9% | EDGAR |
| SC 13G/A | 2022-01-25 | BlackRock Inc. | ALLIANT ENERGY CORP | 27,301,825 | 10.9% | EDGAR |
| SC 13G/A | 2021-02-10 | VANGUARD GROUP INC | ALLIANT ENERGY CORP | 29,984,210 | 12.0% | EDGAR |
| SC 13G | 2021-02-05 | STATE STREET CORP | ALLIANT ENERGY CORP | - | 5.0% | EDGAR |
| SC 13G/A | 2021-01-29 | BlackRock Inc. | ALLIANT ENERGY CORP | 20,097,020 | 8.0% | EDGAR |
| SC 13G | 2020-02-13 | STATE STREET CORP | ALLIANT ENERGY CORP | - | 5.4% | EDGAR |
| SC 13G/A | 2020-02-11 | VANGUARD GROUP INC | ALLIANT ENERGY CORP | 30,817,515 | 12.6% | EDGAR |
| SC 13G/A | 2020-02-05 | BlackRock Inc. | ALLIANT ENERGY CORP | 23,173,142 | 9.6% | EDGAR |
| SC 13G/A | 2019-02-13 | STATE STREET CORP | ALLIANT ENERGY CORP | - | 4.8% | EDGAR |
| SC 13G/A | 2019-02-11 | VANGUARD GROUP INC | ALLIANT ENERGY CORP | 26,589,237 | 10.9% | EDGAR |
| SC 13G/A | 2019-02-04 | BlackRock Inc. | ALLIANT ENERGY CORP | 22,875,576 | 9.7% | EDGAR |