Alliant Energy Corporation (LNT) ownership: Top institutional holder: VANGUARD GROUP INC ($2.20B). Insider activity: Net Seller (5 buys, 15 sells). 4 recent congressional STOCK Act disclosures. SEC EDGAR first-party data.
| Holder | Shares | Market Value | Reported |
|---|---|---|---|
| VANGUARD GROUP INC | 33785294.00 | $2.20B | 2025-12-31 |
| BlackRock, Inc. | 24499440.00 | $1.76B | 2026-03-31 |
| STATE STREET CORP | 17010651.00 | $1.22B | 2026-03-31 |
| VANGUARD CAPITAL MANAGEMENT LLC | 16699462.00 | $1.20B | 2026-03-31 |
| VANGUARD PORTFOLIO MANAGEMENT LLC | 14595006.00 | $1.05B | 2026-03-31 |
| JANUS HENDERSON GROUP PLC | 11273621.00 | $809.00M | 2026-03-31 |
| Nuveen, LLC | 7440386.00 | $533.92M | 2026-03-31 |
| VICTORY CAPITAL MANAGEMENT INC | 7238864.00 | $519.46M | 2026-03-31 |
| Insider | Transaction | Value | Date |
|---|---|---|---|
| Buy | null | 2026-04-15 | |
| Sell | null | 2026-04-10 | |
| Sell | null | 2026-04-10 | |
| Sell | null | 2026-04-10 | |
| Sell | null | 2026-04-10 | |
| Sell | null | 2026-04-10 | |
| Sell | null | 2026-04-10 | |
| Sell | null | 2026-04-10 |
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Institutional data from SEC Form 13F. Insider data from SEC Form 4. Congressional data from STOCK Act disclosures. Not personalized investment advice.