C3is Inc. — All Filings
241 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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20-F
3
424B1
424B3
424B4
424B5
6-K
8-A12B
CERT
CORRESP
DRS
DRS/A
DRSLTR
EFFECT
F-1
F-1/A
F-1MEF
F-3
POS AM
S-8
SC 13D
SC 13D/A
SC 13G
SCHEDULE 13D/A
SCHEDULE 13G
SCHEDULE 13G/A
UPLOAD
| Form | Description | Accession Number | Filed | Period |
|---|---|---|---|---|
| 3 | 3 | 0001193125-26-114074 | Mar 18, 2026 | — |
| 3 | 3 | 0001193125-26-114054 | Mar 18, 2026 | — |
| 3 | 3 | 0001193125-26-114046 | Mar 18, 2026 | — |
| 3 | 3 | 0001193125-26-114018 | Mar 18, 2026 | — |
| 3 | 3 | 0001193125-26-113888 | Mar 18, 2026 | — |
| SCHEDULE 13G | — | 0001896206-26-000004 | Feb 27, 2026 | — |
| 424B3 | 424B3 | 0001193125-26-071850 | Feb 25, 2026 | — |
| 424B3 | 424B3 | 0001193125-26-071841 | Feb 25, 2026 | — |
| 424B3 | 424B3 | 0001193125-26-071827 | Feb 25, 2026 | — |
| 424B3 | 424B3 | 0001193125-26-071812 | Feb 25, 2026 | — |
| 6-K | 6-K | 0001193125-26-071797 | Feb 25, 2026 | — |
| 424B5 | 424B5 | 0001193125-26-071752 | Feb 25, 2026 | — |
| 424B3 | 424B3 | 0001193125-26-058279 | Feb 19, 2026 | — |
| 424B3 | 424B3 | 0001193125-26-058278 | Feb 19, 2026 | — |
| 424B3 | 424B3 | 0001193125-26-058276 | Feb 19, 2026 | — |
| 424B3 | 424B3 | 0001193125-26-058273 | Feb 19, 2026 | — |
| 6-K | 6-K | 0001193125-26-058269 | Feb 19, 2026 | — |
| SCHEDULE 13G | — | 0001493152-26-006140 | Feb 11, 2026 | — |
| 424B3 | 424B3 | 0001193125-26-022556 | Jan 26, 2026 | — |
| 424B3 | 424B3 | 0001193125-26-022555 | Jan 26, 2026 | — |
| 424B3 | 424B3 | 0001193125-26-022552 | Jan 26, 2026 | — |
| 424B3 | 424B3 | 0001193125-26-022549 | Jan 26, 2026 | — |
| 6-K | 6-K | 0001193125-26-022543 | Jan 26, 2026 | — |
| 424B3 | 424B3 | 0001193125-26-018753 | Jan 22, 2026 | — |
| 424B3 | 424B3 | 0001193125-26-018750 | Jan 22, 2026 | — |
| 424B3 | 424B3 | 0001193125-26-018748 | Jan 22, 2026 | — |
| 424B3 | 424B3 | 0001193125-26-018744 | Jan 22, 2026 | — |
| 6-K | 6-K | 0001193125-26-018737 | Jan 22, 2026 | — |
| 424B3 | 424B3 | 0001193125-26-016761 | Jan 20, 2026 | — |
| 424B3 | 424B3 | 0001193125-26-016758 | Jan 20, 2026 | — |
| 424B3 | 424B3 | 0001193125-26-016756 | Jan 20, 2026 | — |
| 424B3 | 424B3 | 0001193125-26-016749 | Jan 20, 2026 | — |
| 6-K | 6-K | 0001193125-26-016737 | Jan 20, 2026 | — |
| SCHEDULE 13G/A | — | 0001909404-26-000006 | Jan 14, 2026 | — |
| SCHEDULE 13G/A | — | 0000898432-26-000030 | Jan 13, 2026 | — |
| SCHEDULE 13G | — | 0001909404-26-000002 | Jan 8, 2026 | — |
| 424B3 | 424B3 | 0001193125-25-327072 | Dec 19, 2025 | — |
| 424B3 | 424B3 | 0001193125-25-327054 | Dec 19, 2025 | — |
| 424B3 | 424B3 | 0001193125-25-327050 | Dec 19, 2025 | — |
| 424B3 | 424B3 | 0001193125-25-327043 | Dec 19, 2025 | — |
| 6-K | 6-K | 0001193125-25-326806 | Dec 19, 2025 | — |
| EFFECT | — | 9999999995-25-003823 | Dec 18, 2025 | — |
| EFFECT | — | 9999999995-25-003822 | Dec 18, 2025 | — |
| EFFECT | — | 9999999995-25-003820 | Dec 18, 2025 | — |
| SCHEDULE 13G | — | 0001079973-25-001874 | Dec 18, 2025 | — |
| SCHEDULE 13G | — | 0001079973-25-001866 | Dec 17, 2025 | — |
| POS AM | POS AM | 0001193125-25-319448 | Dec 15, 2025 | — |
| POS AM | POS AM | 0001193125-25-319443 | Dec 15, 2025 | — |
| POS AM | POS AM | 0001193125-25-319438 | Dec 15, 2025 | — |
| 6-K | 6-K | 0001193125-25-317644 | Dec 12, 2025 | — |