Alliant Energy SEC Filings
NASDAQ: LNTUtilitiesPower GenerationUSD
65.85+0.35 (+0.53%)
At close: Oct 9, 4:00 PM ET · Delayed 15 min
Alliant Energy filing overview
This page lists 60 recent SEC filings by Alliant Energy (LNT), including 38 4, 12 8-K, 3 10-Q, 2 SCHEDULE 13G. The latest annual report (10-K) was filed on Feb 20, 2026 for the period ending Dec 31, 2025. The most recent quarterly report (10-Q) was filed on Jul 31, 2026.
The latest current report (8-K), used to disclose material events such as earnings releases and executive changes, was filed on Aug 21, 2026. Form 10-K is the audited annual report, 10-Q the quarterly report, 8-K covers material events, and Form 4 reports insider transactions. All documents link directly to SEC EDGAR.
Summary generated from market data by MetaCap's automated system. Methodology
LNT SEC filings
| Filed | Form | Description | Document |
|---|---|---|---|
| Aug 21, 2026 | 8-K | Other Events | View on EDGAR |
| Aug 12, 2026 | 4 | Statement of changes in beneficial ownership | View on EDGAR |
| Jul 31, 2026 | 8-K | Results of Operations and Financial Condition | View on EDGAR |
| Jul 31, 2026 | 10-Q | Quarterly report | View on EDGAR |
| Jul 14, 2026 | 4 | Statement of changes in beneficial ownership | View on EDGAR |
| Jul 14, 2026 | 4 | Statement of changes in beneficial ownership | View on EDGAR |
| Jul 14, 2026 | 4 | Statement of changes in beneficial ownership | View on EDGAR |
| Jul 14, 2026 | 4 | Statement of changes in beneficial ownership | View on EDGAR |
| Jul 14, 2026 | 4 | Statement of changes in beneficial ownership | View on EDGAR |
| Jul 14, 2026 | 4 | Statement of changes in beneficial ownership | View on EDGAR |
| Jul 14, 2026 | 4 | Statement of changes in beneficial ownership | View on EDGAR |
| Jul 14, 2026 | 4 | Statement of changes in beneficial ownership | View on EDGAR |
| May 21, 2026 | 8-K | Submission of Matters to a Vote of Security Holders | View on EDGAR |
| May 1, 2026 | 8-K | Results of Operations and Financial Condition | View on EDGAR |
| May 1, 2026 | 10-Q | Quarterly report | View on EDGAR |
| Apr 29, 2026 | SCHEDULE 13G | Beneficial ownership report (passive) | View on EDGAR |
| Apr 28, 2026 | SCHEDULE 13G | Beneficial ownership report (passive) | View on EDGAR |
| Apr 16, 2026 | 4 | Statement of changes in beneficial ownership | View on EDGAR |
| Apr 14, 2026 | 4 | Statement of changes in beneficial ownership | View on EDGAR |
| Apr 14, 2026 | 4 | Statement of changes in beneficial ownership | View on EDGAR |
| Apr 14, 2026 | 4 | Statement of changes in beneficial ownership | View on EDGAR |
| Apr 14, 2026 | 4 | Statement of changes in beneficial ownership | View on EDGAR |
| Apr 14, 2026 | 4 | Statement of changes in beneficial ownership | View on EDGAR |
| Apr 14, 2026 | 4 | Statement of changes in beneficial ownership | View on EDGAR |
| Apr 14, 2026 | 4 | Statement of changes in beneficial ownership | View on EDGAR |
| Mar 31, 2026 | DEF 14A | Definitive proxy statement | View on EDGAR |
| Mar 26, 2026 | SCHEDULE 13G/A | Beneficial ownership report (passive) (amendment) | View on EDGAR |
| Mar 19, 2026 | 424B5 | Prospectus | View on EDGAR |
| Mar 19, 2026 | 8-K | Entry into a Material Definitive Agreement | View on EDGAR |
| Mar 19, 2026 | 4/A | Statement of changes in beneficial ownership (amendment) | View on EDGAR |
| Mar 4, 2026 | 8-K | Entry into a Material Definitive Agreement; Creation of a Direct Financial Obligation or an Obligation under an Off-Balance Sheet Arrangement | View on EDGAR |
| Feb 23, 2026 | 4 | Statement of changes in beneficial ownership | View on EDGAR |
| Feb 23, 2026 | 4 | Statement of changes in beneficial ownership | View on EDGAR |
| Feb 23, 2026 | 4 | Statement of changes in beneficial ownership | View on EDGAR |
| Feb 23, 2026 | 4 | Statement of changes in beneficial ownership | View on EDGAR |
| Feb 23, 2026 | 4 | Statement of changes in beneficial ownership | View on EDGAR |
| Feb 23, 2026 | 4 | Statement of changes in beneficial ownership | View on EDGAR |
| Feb 23, 2026 | 4 | Statement of changes in beneficial ownership | View on EDGAR |
| Feb 23, 2026 | 4 | Statement of changes in beneficial ownership | View on EDGAR |
| Feb 20, 2026 | 8-K | Results of Operations and Financial Condition | View on EDGAR |
| Feb 20, 2026 | 10-K | Annual report | View on EDGAR |
| Jan 12, 2026 | 4 | Statement of changes in beneficial ownership | View on EDGAR |
| Jan 12, 2026 | 4 | Statement of changes in beneficial ownership | View on EDGAR |
| Jan 12, 2026 | 4 | Statement of changes in beneficial ownership | View on EDGAR |
| Jan 12, 2026 | 4 | Statement of changes in beneficial ownership | View on EDGAR |
| Jan 12, 2026 | 4 | Statement of changes in beneficial ownership | View on EDGAR |
| Jan 12, 2026 | 4 | Statement of changes in beneficial ownership | View on EDGAR |
| Jan 12, 2026 | 4 | Statement of changes in beneficial ownership | View on EDGAR |
| Jan 8, 2026 | 8-K | Departure or Appointment of Directors or Officers; Compensatory Arrangements | View on EDGAR |
| Dec 16, 2025 | 8-K | Departure or Appointment of Directors or Officers; Compensatory Arrangements | View on EDGAR |
| Dec 5, 2025 | 8-K | Other Events | View on EDGAR |
| Nov 7, 2025 | 8-K | Results of Operations and Financial Condition | View on EDGAR |
| Nov 7, 2025 | 10-Q | Quarterly report | View on EDGAR |
| Oct 14, 2025 | 4 | Statement of changes in beneficial ownership | View on EDGAR |
| Oct 14, 2025 | 4 | Statement of changes in beneficial ownership | View on EDGAR |
| Oct 14, 2025 | 4 | Statement of changes in beneficial ownership | View on EDGAR |
| Oct 14, 2025 | 4 | Statement of changes in beneficial ownership | View on EDGAR |
| Oct 14, 2025 | 4 | Statement of changes in beneficial ownership | View on EDGAR |
| Oct 14, 2025 | 4 | Statement of changes in beneficial ownership | View on EDGAR |
| Sep 26, 2025 | 8-K | Other Events | View on EDGAR |