Ameren Illinois Co — All Filings
463 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.
All
10-K
10-K/A
10-K405
10-Q
10-Q/A
11-K
3
424B2
424B3
424B5
425
5
8-A12G
8-K
8-K/A
ARS
CORRESP
DEF 14A
DEF 14C
DEFA14C
EFFECT
FWP
PRE 14A
RW
S-3
S-3/A
S-3ASR
S-3DPOS
S-4
S-4/A
SC 13G
SC 13G/A
U-3A-2
U-6B-2
UPLOAD
| Form | Description | Accession Number | Filed | Period |
|---|---|---|---|---|
| 10-K | 10-K | 0001002910-26-000009 | Feb 18, 2026 | Dec 31, 2025 |
| 8-K | FORM 8-K | 0001104659-25-119977 | Dec 10, 2025 | — |
| 10-Q | 10-Q | 0001002910-25-000129 | Nov 6, 2025 | Sep 30, 2025 |
| 8-K | FORM 8-K | 0001104659-25-093779 | Sep 26, 2025 | — |
| 424B2 | 424B2 | 0001104659-25-090464 | Sep 16, 2025 | — |
| FWP | FWP | 0001104659-25-090044 | Sep 15, 2025 | — |
| 424B3 | 424B3 | 0001104659-25-089789 | Sep 15, 2025 | — |
| 10-Q | 10-Q | 0001002910-25-000112 | Aug 4, 2025 | Jun 30, 2025 |
| 8-K | FORM 8-K | 0001104659-25-046956 | May 12, 2025 | May 8, 2025 |
| 10-Q | 10-Q | 0001002910-25-000098 | May 5, 2025 | Mar 31, 2025 |
| DEFA14C | DEFA14C | 0001104659-25-027829 | Mar 25, 2025 | — |
| DEF 14C | DEF 14C | 0001104659-25-027828 | Mar 25, 2025 | May 8, 2025 |
| 8-K | FORM 8-K | 0001104659-25-019676 | Mar 3, 2025 | — |
| 424B2 | 424B2 | 0001104659-25-016889 | Feb 25, 2025 | — |
| FWP | FWP | 0001104659-25-016549 | Feb 24, 2025 | — |
| 424B3 | 424B3 | 0001104659-25-016379 | Feb 24, 2025 | — |
| 10-K | 10-K | 0001002910-25-000055 | Feb 18, 2025 | Dec 31, 2024 |
| 8-K | FORM 8-K | 0001104659-24-130545 | Dec 20, 2024 | Dec 19, 2024 |
| 10-Q | 10-Q | 0001002910-24-000111 | Nov 7, 2024 | Sep 30, 2024 |
| 10-Q | 10-Q | 0001002910-24-000101 | Aug 5, 2024 | Jun 30, 2024 |
| 8-K | FORM 8-K | 0001104659-24-075482 | Jun 27, 2024 | — |
| 8-K | FORM 8-K | 0001104659-24-073784 | Jun 21, 2024 | Jun 20, 2024 |
| 424B2 | 424B2 | 0001104659-24-072776 | Jun 18, 2024 | — |
| FWP | FWP | 0001104659-24-072322 | Jun 17, 2024 | — |
| 424B3 | 424B3 | 0001104659-24-072075 | Jun 17, 2024 | — |
| 8-K | FORM 8-K | 0001104659-24-060607 | May 13, 2024 | May 9, 2024 |
| 10-Q | 10-Q | 0001002910-24-000090 | May 6, 2024 | Mar 31, 2024 |
| UPLOAD | — | 0000000000-24-004247 | Apr 18, 2024 | — |
| DEFA14C | DEFA14C | 0001104659-24-044309 | Apr 5, 2024 | — |
| DEF 14C | DEF 14C | 0001104659-24-044308 | Apr 5, 2024 | May 9, 2024 |
| UPLOAD | — | 0000000000-24-003313 | Mar 27, 2024 | — |
| 10-K | 10-K | 0001002910-24-000056 | Feb 29, 2024 | Dec 31, 2023 |
| 8-K | FORM 8-K | 0001104659-23-126540 | Dec 18, 2023 | Dec 14, 2023 |
| 8-K | FORM 8-K | 0001104659-23-120035 | Nov 21, 2023 | Nov 16, 2023 |
| 10-Q | 10-Q | 0001002910-23-000112 | Nov 9, 2023 | Sep 30, 2023 |
| S-3ASR | S-3ASR | 0001104659-23-109165 | Oct 13, 2023 | — |
| 10-Q | 10-Q | 0001002910-23-000102 | Aug 3, 2023 | Jun 30, 2023 |
| 8-K | FORM 8-K | 0001104659-23-066428 | May 31, 2023 | — |
| 424B2 | 424B2 | 0001104659-23-064052 | May 24, 2023 | — |
| FWP | FWP | 0001104659-23-063624 | May 23, 2023 | — |
| 424B3 | 424B3 | 0001104659-23-063446 | May 23, 2023 | — |
| 8-K | FORM 8-K | 0001104659-23-059889 | May 12, 2023 | May 11, 2023 |
| 10-Q | 10-Q | 0001002910-23-000090 | May 5, 2023 | Mar 31, 2023 |
| DEFA14C | DEFA14C | 0001104659-23-037764 | Mar 28, 2023 | — |
| DEF 14C | DEF 14C | 0001104659-23-037762 | Mar 28, 2023 | — |
| 10-K | 10-K | 0001002910-23-000053 | Feb 22, 2023 | Dec 31, 2022 |
| 8-K | FORM 8-K | 0001104659-23-005601 | Jan 23, 2023 | Jan 20, 2023 |
| 8-K | FORM 8-K | 0001104659-23-002326 | Jan 9, 2023 | Jan 6, 2023 |
| 8-K | FORM 8-K | 0001104659-22-124929 | Dec 6, 2022 | — |
| 8-K | FORM 8-K | 0001104659-22-121129 | Nov 22, 2022 | — |