ALLIANT ENERGY CORP — All Filings
1,002 total filings on record
Public companies registered with the SEC are required to file periodic reports, disclosures, and notices throughout the year. The most important are the 10-K (annual report), 10-Q (quarterly report), and 8-K (material event notice). Use the filters below to narrow by form type.
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10-K
10-K/A
10-K405
10-K405/A
10-Q
10-Q/A
11-K
15-15D
25
3
3/A
35-CERT
35-CERT/A
4
4/A
424B2
424B3
424B5
5
5/A
8-A12B
8-A12B/A
8-K
8-K/A
ARS
CERT
CORRESP
CT ORDER
DEF 14A
DEFA14A
FWP
NO ACT
NT 10-K
NT 11-K
POS AMC
POSASR
PRE 14A
PX14A6G
RW
S-3
S-3/A
S-3ASR
S-3D
S-3MEF
S-4
S-4/A
S-8
S-8 POS
SC 13D
SC 13D/A
SC 13G
SC 13G/A
SCHEDULE 13G/A
SE
U-1
U-1/A
U-12-IB
U-13-60
U-57
U-6B-2
U-6B-2/A
U-9C-3
U5A
U5B
U5B/A
U5S
U5S/A
UPLOAD
| Form | Description | Accession Number | Filed | Period |
|---|---|---|---|---|
| 4 | FORM 4 | 0000352541-25-000065 | Jul 15, 2025 | Jul 11, 2025 |
| 4 | FORM 4 | 0000352541-25-000066 | Jul 15, 2025 | Jul 11, 2025 |
| 4 | FORM 4 | 0000352541-25-000061 | Jul 15, 2025 | Jul 11, 2025 |
| 4 | FORM 4 | 0000352541-25-000062 | Jul 15, 2025 | Jul 11, 2025 |
| 4 | FORM 4 | 0000352541-25-000063 | Jul 15, 2025 | Jul 11, 2025 |
| 4 | FORM 4 | 0000352541-25-000064 | Jul 15, 2025 | Jul 11, 2025 |
| 11-K | 11-K | 0000352541-25-000059 | Jun 24, 2025 | Dec 31, 2024 |
| 8-K | 8-K | 0000352541-25-000055 | May 20, 2025 | May 16, 2025 |
| 8-K | 8-K | 0001628280-25-026398 | May 19, 2025 | May 13, 2025 |
| 8-K | 8-K | 0001193125-25-120808 | May 15, 2025 | May 12, 2025 |
| 10-Q | 10-Q | 0000352541-25-000053 | May 9, 2025 | Mar 31, 2025 |
| 424B5 | 424B5 | 0001193125-25-116988 | May 9, 2025 | — |
| 8-K | 8-K | 0001193125-25-116990 | May 9, 2025 | — |
| 8-K | 8-K | 0000352541-25-000050 | May 9, 2025 | May 8, 2025 |
| PX14A6G | — | 0001214659-25-007193 | May 8, 2025 | — |
| 3 | FORM 3 | 0000352541-25-000047 | Apr 16, 2025 | Apr 7, 2025 |
| 4 | FORM 4 | 0000352541-25-000048 | Apr 16, 2025 | Apr 15, 2025 |
| 4 | FORM 4 | 0000352541-25-000045 | Apr 15, 2025 | Apr 11, 2025 |
| 4 | FORM 4 | 0000352541-25-000043 | Apr 15, 2025 | Apr 11, 2025 |
| 4 | FORM 4 | 0000352541-25-000039 | Apr 15, 2025 | Apr 11, 2025 |
| 4 | FORM 4 | 0000352541-25-000040 | Apr 15, 2025 | Apr 11, 2025 |
| 4 | FORM 4 | 0000352541-25-000042 | Apr 15, 2025 | Apr 11, 2025 |
| 4 | FORM 4 | 0000352541-25-000041 | Apr 15, 2025 | Apr 11, 2025 |
| DEF 14A | DEF 14A | 0000352541-25-000036 | Apr 1, 2025 | May 16, 2025 |
| DEFA14A | DEFA14A | 0000352541-25-000037 | Apr 1, 2025 | — |
| ARS | ARS | 0000352541-25-000038 | Apr 1, 2025 | Dec 31, 2024 |
| 3 | FORM 3 | 0000352541-25-000031 | Mar 12, 2025 | Mar 2, 2025 |
| 8-K | 8-K | 0000352541-25-000029 | Mar 10, 2025 | Mar 7, 2025 |
| 8-K | 8-K | 0000352541-25-000025 | Mar 3, 2025 | — |
| 4 | FORM 4 | 0000352541-25-000022 | Feb 24, 2025 | Feb 20, 2025 |
| 4 | FORM 4 | 0000352541-25-000023 | Feb 24, 2025 | Feb 20, 2025 |
| 4 | FORM 4 | 0000352541-25-000016 | Feb 24, 2025 | Feb 20, 2025 |
| 4 | FORM 4 | 0000352541-25-000019 | Feb 24, 2025 | Feb 20, 2025 |
| 4 | FORM 4 | 0000352541-25-000018 | Feb 24, 2025 | Feb 20, 2025 |
| 4 | FORM 4 | 0000352541-25-000020 | Feb 24, 2025 | Feb 20, 2025 |
| 4 | FORM 4 | 0000352541-25-000021 | Feb 24, 2025 | Feb 20, 2025 |
| 10-K | 10-K | 0000352541-25-000014 | Feb 21, 2025 | Dec 31, 2024 |
| 8-K | 8-K | 0000352541-25-000012 | Feb 21, 2025 | Feb 20, 2025 |
| 8-K | 8-K | 0000352541-25-000009 | Feb 11, 2025 | Feb 7, 2025 |
| 4 | FORM 4 | 0000352541-25-000007 | Jan 14, 2025 | Jan 10, 2025 |
| 4 | FORM 4 | 0000352541-25-000002 | Jan 14, 2025 | Jan 10, 2025 |
| 4 | FORM 4 | 0000352541-25-000003 | Jan 14, 2025 | Jan 10, 2025 |
| 4 | FORM 4 | 0000352541-25-000004 | Jan 14, 2025 | Jan 10, 2025 |
| 4 | FORM 4 | 0000352541-25-000005 | Jan 14, 2025 | Jan 10, 2025 |
| 4 | FORM 4 | 0000352541-25-000006 | Jan 14, 2025 | Jan 10, 2025 |
| 8-K | 8-K | 0000352541-24-000107 | Dec 18, 2024 | — |
| 4 | FORM 4 | 0000352541-24-000105 | Nov 20, 2024 | — |
| 8-K | 8-K | 0000352541-24-000102 | Nov 1, 2024 | Oct 31, 2024 |
| 10-Q | 10-Q | 0000352541-24-000104 | Nov 1, 2024 | Sep 30, 2024 |
| 4 | FORM 4 | 0000352541-24-000099 | Oct 15, 2024 | Oct 11, 2024 |