As of May 14, 2026, Alliant Energy's top three insider holders are John O Larsen (Executive Chairman, 289.94K shares), John O Larsen (Executive Chairman, 289.94K shares), Robert J Durian (Evp And Cfo, 157.13K shares).
| Holder | Position | Shares (Direct) | Shares (Indirect) | Report Date |
|---|---|---|---|---|
| John O Larsen | Executive Chairman | 289,939 | 0 | 24 Feb, 2025 |
| John O Larsen | Executive Chairman | 289,939 | 0 | 24 Feb, 2025 |
| Robert J Durian | Evp And Cfo | 157,126 | 0 | 23 Feb, 2026 |
| Robert J Durian | Evp And Cfo | 157,126 | 0 | 23 Feb, 2026 |
| Robert J Durian | Evp And Cfo | 157,126 | 0 | 23 Feb, 2026 |
| Lisa M Barton | President And Ceo | 107,452 | 0 | 23 Feb, 2026 |
| James H Gallegos | Evp, Gen Cnsl And Corp Sec | 57,448 | 0 | 01 Mar, 2022 |
| James H Gallegos | Evp, Gen Cnsl And Corp Sec | 57,448 | 0 | 01 Mar, 2022 |
| James H Gallegos | Evp, Gen Cnsl And Corp Sec | 57,448 | 0 | 01 Mar, 2022 |
| Leon David A De | Senior Vice President | 47,708 | 0 | 23 Feb, 2026 |
| Leon David A De | Senior Vice President | 47,708 | 0 | 23 Feb, 2026 |
| Leon David A De | Senior Vice President | 47,708 | 0 | 23 Feb, 2026 |
| Terry L Kouba | Senior Vice President | 42,849 | 0 | 20 Feb, 2024 |
| Terry L Kouba | Senior Vice President | 42,849 | 0 | 20 Feb, 2024 |
| Terry L Kouba | Senior Vice President | 42,849 | 0 | 20 Feb, 2024 |
| Raja Sundararajan | Executive Vice President | 33,050 | 0 | 23 Feb, 2026 |
| Raja Sundararajan | Executive Vice President | 33,050 | 0 | 23 Feb, 2026 |
| Raja Sundararajan | Executive Vice President | 33,050 | 0 | 23 Feb, 2026 |
| Antonio P Smyth | Executive Vice President | 20,678 | 0 | 16 Apr, 2026 |
| Benjamin M Bilitz | Cao And Controller | 19,420 | 0 | 24 Feb, 2025 |
| Benjamin M Bilitz | Cao And Controller | 19,420 | 0 | 24 Feb, 2025 |
| Benjamin M Bilitz | Cao And Controller | 19,420 | 0 | 24 Feb, 2025 |
| Raja Sundararajan | Executive Vice President | 16,358 | 0 | 24 Feb, 2025 |
| Raja Sundararajan | Executive Vice President | 16,358 | 0 | 24 Feb, 2025 |
| Raja Sundararajan | Executive Vice President | 16,358 | 0 | 24 Feb, 2025 |
| Mayuri Farlinger | Vice President | 10,432 | 0 | 23 Feb, 2026 |
| Mayuri Farlinger | Vice President | 10,432 | 0 | 23 Feb, 2026 |
| Mayuri Farlinger | Vice President | 10,432 | 0 | 23 Feb, 2026 |
| Michael Luhrs | Senior Vice President | 4,037 | 0 | 27 Feb, 2023 |
| Michael Luhrs | Senior Vice President | 4,037 | 0 | 27 Feb, 2023 |
| Michael Luhrs | Senior Vice President | 4,037 | 0 | 27 Feb, 2023 |
| Dylan Syse | Cao And Controller | 4,020 | 0 | 23 Feb, 2026 |
| Dylan Syse | Cao And Controller | 4,020 | 0 | 23 Feb, 2026 |
| Dylan Syse | Cao And Controller | 4,020 | 0 | 23 Feb, 2026 |
| Rebecca C. Valcq | Vice President | 2,335 | 0 | 19 Mar, 2026 |
| Rebecca C. Valcq | Vice President | 2,335 | 0 | 19 Mar, 2026 |
| Rebecca C. Valcq | Vice President | 2,335 | 0 | 19 Mar, 2026 |
* Please note that the shares above only reflect shares from the fund portfolio and the institutional portfolio. Shares from the personal portfolio are excluded from this Institutional Ownership Page. See these insiders' latest transactions here on Insider Page.
| Transaction Date | Insider Name | Security Class | Transaction Type | Shares Traded | Price | Shares Remaining | Ownership | Code |
|---|---|---|---|---|---|---|---|---|
| 15 Apr, 2026 | Antonio P Smyth | Common Stock | D | 1,259 | $72.18 | 20,678 | D | F |
| 10 Apr, 2026 | Christie Raymond | Deferred Common Stock Units | A | 1,043 | $73.10 | 8,585 | D | A |
| 10 Apr, 2026 | Ignacio A Cortina | Deferred Common Stock Units | A | 667 | $73.10 | 10,227 | D | A |
| 10 Apr, 2026 | Roger K Newport | Deferred Common Stock Units | A | 769 | $73.10 | 31,446 | D | A |
| 10 Apr, 2026 | Michael Dennis Garcia | Deferred Common Stock Units | A | 876 | $73.10 | 25,762 | D | A |
| 10 Apr, 2026 | Roger K Newport | Deferred Common Stock Units | A | 769 | $73.10 | 31,446 | D | A |
| 10 Apr, 2026 | Stephanie Cox | Deferred Common Stock Units | A | 547 | $73.10 | 17,253 | D | A |
| 10 Apr, 2026 | Stephanie Cox | Deferred Common Stock Units | A | 547 | $73.10 | 17,253 | D | A |
| 10 Apr, 2026 | Patrick E Allen | Deferred Common Stock Units | A | 513 | $73.10 | 45,515 | D | A |
| 19 Feb, 2026 | Rebecca C. Valcq | Common Stock | D | 438 | $70.01 | 2,335 | D | F |
| 19 Feb, 2026 | Rebecca C. Valcq | Common Stock | D | 438 | $70.01 | 2,335 | D | F |
| 19 Feb, 2026 | Rebecca C. Valcq | Common Stock | D | 438 | $70.01 | 2,335 | D | F |
| 19 Feb, 2026 | Robert J Durian | Common Stock | A | 27,882 | $0.00 | 167,806 | D | A |
| 19 Feb, 2026 | Raja Sundararajan | Common Stock . | A | 18,768 | $0.00 | 35,590 | D | A |
| 19 Feb, 2026 | Rebecca C. Valcq | Common Stock | A | 1,004 | $0.00 | 2,773 | D | A |
| 19 Feb, 2026 | Robert J Durian | Common Stock | A | 27,882 | $0.00 | 167,806 | D | A |
| 19 Feb, 2026 | Mayuri Farlinger | Common Stock | A | 3,026 | $0.00 | 10,513 | D | A |
| 19 Feb, 2026 | Dylan Syse | Common Stock | A | 1,063 | $0.00 | 3,776 | D | A |
| 19 Feb, 2026 | Mayuri Farlinger | Common Stock | A | 3,026 | $0.00 | 10,513 | D | A |
| 19 Feb, 2026 | Dylan Syse | Common Stock | A | 1,063 | $0.00 | 3,776 | D | A |