10 insiders reported 41 Form 4 transactions for ALLIANT ENERGY CORP (LNT) over the past 18 months (most recent 2026-04-16). Recent activity: Smyth Antonio P (Executive Vice President) Sell 1,259 shares, Valcq Rebecca C. (Vice President) Sell 438 shares, Syse Dylan (CAO and Controller) Buy 1,063 shares, Barton Lisa M (President and CEO) Buy 29,527 shares, Barton Lisa M (President and CEO) Sell 28,594 shares. Source: SEC Form 4.
| Date | Insider | Title | Type | Shares | Value |
|---|---|---|---|---|---|
| 2026-04-16 | Smyth Antonio P | Executive Vice President | Sell | 1,259 | $90,875 |
| 2026-03-19 | Valcq Rebecca C. | Vice President | Sell | 438 | $30,664 |
| 2026-02-23 | Syse Dylan | CAO and Controller | Buy | 1,063 | $0 |
| 2026-02-23 | Barton Lisa M | President and CEO | Buy | 29,527 | $0 |
| 2026-02-23 | Barton Lisa M | President and CEO | Sell | 28,594 | $2.0M |
| 2026-02-23 | Valcq Rebecca C. | Vice President | Buy | 1,004 | $0 |
| 2026-02-23 | DURIAN ROBERT J | EVP and CFO | Buy | 27,882 | $0 |
| 2026-02-23 | DURIAN ROBERT J | EVP and CFO | Buy | 5,950 | $0 |
| 2026-02-23 | DURIAN ROBERT J | EVP and CFO | Sell | 16,630 | $1.2M |
| 2026-02-23 | Farlinger Mayuri | Vice President | Buy | 3,026 | $0 |
| 2026-02-23 | Farlinger Mayuri | Vice President | Buy | 1,098 | $0 |
| 2026-02-23 | Farlinger Mayuri | Vice President | Sell | 1,179 | $82,542 |
| 2026-02-23 | Barton Lisa M | President and CEO | Buy | 47,533 | $0 |
| 2026-02-23 | Syse Dylan | CAO and Controller | Buy | 750 | $0 |
| 2026-02-23 | Syse Dylan | CAO and Controller | Sell | 506 | $35,425 |
| 2026-02-23 | Sundararajan Raja | Executive Vice President | Buy | 18,768 | $0 |
| 2026-02-23 | Sundararajan Raja | Executive Vice President | Buy | 8,784 | $0 |
| 2026-02-23 | Sundararajan Raja | Executive Vice President | Sell | 11,324 | $792,793 |
| 2026-02-23 | Smyth Antonio P | Executive Vice President | Buy | 13,114 | $0 |
| 2026-02-23 | Smyth Antonio P | Executive Vice President | Buy | 5,240 | $0 |
| 2026-02-23 | Smyth Antonio P | Executive Vice President | Sell | 6,226 | $435,882 |
| 2026-02-23 | de Leon David A | Senior Vice President | Buy | 8,616 | $0 |
| 2026-02-23 | de Leon David A | Senior Vice President | Buy | 2,306 | $0 |
| 2026-02-23 | de Leon David A | Senior Vice President | Sell | 5,207 | $364,542 |
| 2025-04-16 | Smyth Antonio P | Executive Vice President | Buy | 9,727 | $0 |
Source: SEC Form 4 filings · as of 2026-04-16