Alliant Energy Corp. 13F holders
Of the 44 funds followed here, 6 reported a position in Alliant Energy Corp. in a 13F for the quarter ended 30 June 2026. The largest: Geode Capital Management, 7.4 million shares worth $563.0 million, 0.0% of its reported book. Sold out: Soros Fund Management, Two Sigma Investments.
| Fund | Shares | Value | Of its book | Change on the quarter | Status | Quarter ended | Filing |
|---|---|---|---|---|---|---|---|
| Geode Capital Management | 7,407,445 | $563.0 million | 0.0% | +149,419 | added | 30 June 2026 | 13F |
| FMR LLC | 5,043,741 | $384.8 million | 0.0% | +2,181,315 | added | 30 June 2026 | 13F |
| Point72 Asset Management | 2,094,866 | $159.8 million | 0.2% | +851,285 | added | 30 June 2026 | 13F |
| Renaissance Technologies | 477,500 | $36.4 million | 0.1% | -233,200 | trimmed | 30 June 2026 | 13F |
| Millennium Management | 344,680 | $26.3 million | 0.0% | +141,299 | added | 30 June 2026 | 13F |
| Citadel Advisors | 290,100 | $22.1 million | 0.0% | -44,946 | trimmed | 30 June 2026 | 13F |
| Soros Fund Management | 0 | $0 | 0.0% | -18,452 | exited | 30 June 2026 | 13F |
| Two Sigma Investments | 0 | $0 | 0.0% | -68,938 | exited | 30 June 2026 | 13F |
Value is what the fund reported. Change is shares against the fund's previous 13F; a fund with one filing read shows no change. 13Fs cover long US positions of managers above $100 million and are filed up to 45 days after the quarter.
Schedule 13D and 13G filed on the name, last twelve months
| Filed | Schedule | Who | Holding | Of the class | Event date | Rule or purpose | Filing |
|---|---|---|---|---|---|---|---|
| 29 April 2026 | 13G | Vanguard Capital Management and 1 other | 19.4 million | 7.5% | 31 March 2026 | passive, institutional (13d-1(b)) | EDGAR |
| 28 April 2026 | 13G | Vanguard Portfolio Management and 1 other | 14.6 million | 5.7% | 31 March 2026 | passive, institutional (13d-1(b)) | EDGAR |
| 26 March 2026 | 13G/A | The Vanguard Group and 1 other | 0 | 0.0% | 13 March 2026 | passive, institutional (13d-1(b)) | EDGAR |
A Schedule 13D is filed by anyone who crosses 5% of a class with intent to influence; a 13G by a passive holder. Amendments (/A) report a change, including an exit to zero. Holding and percentage are as the filer stated them on the cover page; the purpose is the filer's own words, cut short.
Fails to deliver
| Settlement date | Shares failed | Price | File |
|---|---|---|---|
| 26 August 2026 | 2,639 | $68.34 | SEC |
| 17 August 2026 | 3,691 | $70.60 | SEC |
| 14 August 2026 | 42 | $70.20 | SEC |
| 13 August 2026 | 28,595 | $70.24 | SEC |
| 12 August 2026 | 7,546 | $68.58 | SEC |
| 10 August 2026 | 3,197 | $69.37 | SEC |
| 7 August 2026 | 251 | $69.52 | SEC |
| 5 August 2026 | 2,085 | $70.66 | SEC |
| 4 August 2026 | 2,963 | $71.27 | SEC |
| 31 July 2026 | 1,418 | $70.89 | SEC |
| 30 July 2026 | 816 | $72.00 | SEC |
| 22 July 2026 | 18,718 | $73.11 | SEC |
| 20 July 2026 | 21,916 | $74.82 | SEC |
Shares that failed to deliver at settlement, per day, from the SEC's half-month files, which arrive about two weeks after the period. Largest in the window: 28,595 on 13 August 2026. A fail is an operational fact about settlement, not a position.
Source
Each fund's 13F-HR on EDGAR, linked per row; positions matched to LNT by CUSIP from the SEC's own fails-to-deliver files; Schedule 13D and 13G from the company's own filing index, each read to confirm the company is the issuer named.
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