Alliant Energy's top three insider shareholders as of September 29, 2026 are John O Larsen (Executive Chairman, 289.94K shares), Robert J Durian (Evp And Cfo, 158.15K shares), Lisa M Barton (President And Ceo, 107.45K shares).
| # | Insider | Position | Direct | Indirect | Total | Share of Insiders | Last Filed |
|---|---|---|---|---|---|---|---|
| 1 | John O Larsen | Executive Chairman | 289,939 | 0 | 289,939 | 35.6% | 24 Feb, 2025 |
| 2 | Robert J Durian | Evp And Cfo | 158,146 | 0 | 158,146 | 19.4% | 12 Aug, 2026 |
| 3 | Lisa M Barton | President And Ceo | 107,452 | 0 | 107,452 | 13.2% | 23 Feb, 2026 |
| 4 | James H Gallegos | Evp, Gen Cnsl And Corp Sec | 57,448 | 0 | 57,448 | 7.0% | 01 Mar, 2022 |
| 5 | Raja Sundararajan | Executive Vice President | 49,408 | 0 | 49,408 | 6.1% | 23 Feb, 2026 |
| 6 | Leon David A De | Senior Vice President | 47,708 | 0 | 47,708 | 5.9% | 23 Feb, 2026 |
| 7 | Terry L Kouba | Senior Vice President | 42,849 | 0 | 42,849 | 5.3% | 20 Feb, 2024 |
| 8 | Antonio P Smyth | Executive Vice President | 20,678 | 0 | 20,678 | 2.5% | 16 Apr, 2026 |
| 9 | Benjamin M Bilitz | Cao And Controller | 19,420 | 0 | 19,420 | 2.4% | 24 Feb, 2025 |
| 10 | Mayuri Farlinger | Vice President | 10,432 | 0 | 10,432 | 1.3% | 23 Feb, 2026 |
| 11 | Michael Luhrs | Senior Vice President | 4,037 | 0 | 4,037 | 0.5% | 27 Feb, 2023 |
| 12 | Dylan Syse | Cao And Controller | 4,020 | 0 | 4,020 | 0.5% | 23 Feb, 2026 |
| 13 | Rebecca C. Valcq | Vice President | 2,335 | 0 | 2,335 | 0.3% | 19 Mar, 2026 |
| 14 | Nancy Joy Falotico | Director | 1,210 | 0 | 1,210 | 0.1% | 13 Jun, 2022 |
Each row is that insider’s most recently reported position, from Form 4 filings over the last 60 months — which is why this total does not tie to the quarterly series above, where a quarter counts only the insiders who filed in it. Shares held through a fund or institutional portfolio are counted on the institutional ownership page instead.
| Date | Insider | Position | Transaction | Shares | Price | Value | Shares Held After | Ownership |
|---|---|---|---|---|---|---|---|---|
| 10 Aug, 2026 | Robert J Durian | Evp And Cfo | Disposed S | 0 | $68.60 | $7 | 158,146 | Direct |
| 10 Jul, 2026 | Ignacio A Cortina | Director | Acquired A | 638 | $76.40 | $48.75K | 10,943 | Direct |
| 10 Jul, 2026 | Christie Raymond | Director | Acquired A | 998 | $76.40 | $76.25K | 9,648 | Direct |
| 10 Jul, 2026 | Stephanie Cox | Director | Acquired A | 524 | $76.40 | $40.00K | 17,907 | Direct |
| 10 Jul, 2026 | Nancy Joy Falotico | Director | Acquired A | 744 | $76.40 | $56.87K | 20,523 | Direct |
| 10 Jul, 2026 | Patrick E Allen | Director | Acquired A | 491 | $76.40 | $37.50K | 46,349 | Direct |
| 10 Jul, 2026 | Roger K Newport | Director | Acquired A | 736 | $76.40 | $56.25K | 32,420 | Direct |
| 10 Jul, 2026 | Manu Asthana | Director | Acquired A | 998 | $76.40 | $76.25K | 998 | Direct |
| 10 Jul, 2026 | Michael Dennis Garcia | Director | Acquired A | 838 | $76.40 | $64.00K | 26,794 | Direct |
| 15 Apr, 2026 | Antonio P Smyth | Executive Vice President | Disposed F | 1,259 | $72.18 | $90.87K | 20,678 | Direct |
| 10 Apr, 2026 | Patrick E Allen | Director | Acquired A | 513 | $73.10 | $37.50K | 45,515 | Direct |
| 10 Apr, 2026 | Roger K Newport | Director | Acquired A | 769 | $73.10 | $56.25K | 31,446 | Direct |
| 10 Apr, 2026 | Stephanie Cox | Director | Acquired A | 547 | $73.10 | $40.00K | 17,253 | Direct |
| 10 Apr, 2026 | Michael Dennis Garcia | Director | Acquired A | 876 | $73.10 | $64.00K | 25,762 | Direct |
| 10 Apr, 2026 | Ignacio A Cortina | Director | Acquired A | 667 | $73.10 | $48.75K | 10,227 | Direct |
| 10 Apr, 2026 | Nancy Joy Falotico | Director | Acquired A | 778 | $73.10 | $56.88K | 19,630 | Direct |
| 10 Apr, 2026 | Christie Raymond | Director | Acquired A | 1,043 | $73.10 | $76.25K | 8,585 | Direct |
| 19 Feb, 2026 | Rebecca C. Valcq | Vice President | Disposed F | 438 | $70.01 | $30.66K | 2,335 | Direct |
| 19 Feb, 2026 | Lisa M Barton | President And Ceo | Acquired A | 47,533 | $0.00 | $0 | 106,519 | Direct |
| 19 Feb, 2026 | Antonio P Smyth | Executive Vice President | Acquired A | 13,114 | $0.00 | $0 | 22,841 | Direct |