Alliant Energy Corp
LNTNasdaqCIK 352541UtilitiesFiscal year ends Dec 31
Reports and events: 306 filings
Newest first, by EDGAR acceptance time (Eastern). Each filing’s page lists its documents on sec.gov and, for 10-K and 10-Q reports, the extracted sections.
What the forms are: 10-K, 10-Q, 8-K, Form 4, DEF 14A, Schedule 13D, Schedule 13G, amendments, accession numbers.
| Filed | Form | What it is | Accession number |
|---|---|---|---|
| 2026-10-3011:21 ET | 10-Q | Quarterly reportPeriod 2026-09-30 | 0000352541-26-000047 |
| 2026-10-3018:06 ET | 8-K | 2.02 Results of operations; 9.01 Financial statements and exhibits | 0000352541-26-000045 |
| 2026-10-2808:15 ET | 8-K | 1.01 Entry into a material agreement; 2.03 New direct financial obligation; 9.01 Financial statements and exhibits | 0001193125-26-435177 |
| 2026-08-2108:45 ET | 8-K | 8.01 Other events; 9.01 Financial statements and exhibits | 0001193125-26-360020 |
| 2026-07-3111:22 ET | 10-Q | Quarterly reportPeriod 2026-06-30 | 0000352541-26-000043 |
| 2026-07-3118:02 ET | 8-K | 2.02 Results of operations; 9.01 Financial statements and exhibits | 0000352541-26-000042 |
| 2026-05-2117:05 ET | 8-K | 5.07 Shareholder vote results | 0000352541-26-000036 |
| 2026-05-0111:07 ET | 10-Q | Quarterly reportPeriod 2026-03-31 | 0000352541-26-000033 |
| 2026-05-0118:23 ET | 8-K | 2.02 Results of operations; 9.01 Financial statements and exhibits | 0000352541-26-000030 |
| 2026-03-3118:02 ET | DEF 14A | Proxy statementPeriod 2026-05-20 | 0000352541-26-000025 |
| 2026-03-1917:28 ET | 8-K | 1.01 Entry into a material agreement; 9.01 Financial statements and exhibits | 0001193125-26-116244 |
| 2026-03-0420:13 ET | 8-K | 1.01 Entry into a material agreement; 2.03 New direct financial obligation; 9.01 Financial statements and exhibits | 0000352541-26-000009 |
| 2026-02-2014:58 ET | 10-K | Annual reportPeriod 2025-12-31 | 0000352541-26-000007 |
| 2026-02-2018:22 ET | 8-K | 2.02 Results of operations; 9.01 Financial statements and exhibits | 0000352541-26-000005 |
| 2026-01-0816:15 ET | 8-K | 5.02 Departure or appointment of officers or directors | 0000352541-26-000003 |
| 2025-12-1616:20 ET | 8-K | 5.02 Departure or appointment of officers or directors | 0000352541-25-000089 |
| 2025-12-0521:45 ET | 8-K | 8.01 Other events; 9.01 Financial statements and exhibits | 0000352541-25-000085 |
| 2025-11-0712:02 ET | 10-Q | Quarterly reportPeriod 2025-09-30 | 0000352541-25-000081 |
| 2025-11-0718:10 ET | 8-K | 2.02 Results of operations; 9.01 Financial statements and exhibits | 0000352541-25-000079 |
| 2025-09-2619:58 ET | 8-K | 8.01 Other events; 9.01 Financial statements and exhibits | 0000352541-25-000076 |
| 2025-09-1121:34 ET | 8-K | 8.01 Other events; 9.01 Financial statements and exhibits | 0000352541-25-000074 |
| 2025-08-0811:49 ET | 10-Q | Quarterly reportPeriod 2025-06-30 | 0000352541-25-000072 |
| 2025-08-0818:03 ET | 8-K | 2.02 Results of operations; 9.01 Financial statements and exhibits | 0000352541-25-000070 |
| 2025-05-2009:32 ET | 8-K | 5.07 Shareholder vote results | 0000352541-25-000055 |
| 2025-05-1909:00 ET | 8-K | 8.01 Other events; 9.01 Financial statements and exhibits | 0001628280-25-026398 |
| 2025-05-1516:12 ET | 8-K | 1.01 Entry into a material agreement; 2.03 New direct financial obligation; 3.02 Unregistered sale of equity; 8.01 Other events; 9.01 Financial statements and exhibits | 0001193125-25-120808 |
| 2025-05-0917:28 ET | 8-K | 1.01 Entry into a material agreement; 9.01 Financial statements and exhibits | 0001193125-25-116990 |
| 2025-05-0912:28 ET | 10-Q | Quarterly reportPeriod 2025-03-31 | 0000352541-25-000053 |
| 2025-05-0918:20 ET | 8-K | 2.02 Results of operations; 9.01 Financial statements and exhibits | 0000352541-25-000050 |
| 2025-04-0118:02 ET | DEF 14A | Proxy statementPeriod 2025-05-16 | 0000352541-25-000036 |
| 2025-03-1008:35 ET | 8-K | 5.02 Departure or appointment of officers or directors | 0000352541-25-000029 |
| 2025-03-0316:08 ET | 8-K | 1.01 Entry into a material agreement; 2.03 New direct financial obligation; 9.01 Financial statements and exhibits | 0000352541-25-000025 |
| 2025-02-2116:46 ET | 10-K | Annual reportPeriod 2024-12-31 | 0000352541-25-000014 |
| 2025-02-2118:08 ET | 8-K | 2.02 Results of operations; 9.01 Financial statements and exhibits | 0000352541-25-000012 |
| 2025-02-1119:11 ET | 8-K | 5.02 Departure or appointment of officers or directors | 0000352541-25-000009 |
| 2024-12-1810:31 ET | 8-K | 2.03 New direct financial obligation; 9.01 Financial statements and exhibits | 0000352541-24-000107 |
| 2024-11-0111:39 ET | 10-Q | Quarterly reportPeriod 2024-09-30 | 0000352541-24-000104 |
| 2024-11-0118:05 ET | 8-K | 2.02 Results of operations; 9.01 Financial statements and exhibits | 0000352541-24-000102 |
| 2024-09-0608:56 ET | 8-K | 8.01 Other events; 9.01 Financial statements and exhibits | 0000352541-24-000092 |
| 2024-08-0211:51 ET | 10-Q | Quarterly reportPeriod 2024-06-30 | 0000352541-24-000089 |
| 2024-08-0218:05 ET | 8-K | 2.02 Results of operations; 9.01 Financial statements and exhibits | 0000352541-24-000087 |
| 2024-07-2612:21 ET | 8-K | 5.04 Item not in the standard list; 9.01 Financial statements and exhibits | 0000352541-24-000084 |
| 2024-07-1516:42 ET | 8-K | 5.02 Departure or appointment of officers or directors | 0000352541-24-000074 |
| 2024-06-2416:48 ET | 8-K | 2.06 Material impairments | 0000352541-24-000072 |
| 2024-06-0613:17 ET | 8-K | 1.01 Entry into a material agreement; 2.03 New direct financial obligation; 8.01 Other events; 9.01 Financial statements and exhibits | 0000352541-24-000067 |
| 2024-05-2016:35 ET | 8-K | 5.07 Shareholder vote results | 0000352541-24-000064 |
| 2024-05-0311:56 ET | 10-Q | Quarterly reportPeriod 2024-03-31 | 0000352541-24-000058 |
| 2024-05-0318:06 ET | 8-K | 2.02 Results of operations; 9.01 Financial statements and exhibits | 0000352541-24-000054 |
| 2024-04-0217:37 ET | DEF 14A | Proxy statementPeriod 2024-05-17 | 0000352541-24-000038 |
| 2024-03-0817:03 ET | 8-K | 5.02 Departure or appointment of officers or directors | 0000352541-24-000032 |
Source: SEC EDGAR, the company’s filing index. Last ingested by Listed: Oct 30, 2026, 11:23 ET. Listed shows no prices and gives no investment advice.