Company facts
- Headquarters
- Athens
- Most recent report
- 6-K, filed Sep 29, 2026
- Filings on record
- 316 filings
- On EDGAR
- CIK 1951067
- Fiscal year ends
- December
- Filer status
- Non-accelerated filer, Emerging growth company
Financials 8 of 53
- 6-K Report a foreign issuer made public elsewhere Sep 29, 2026
- 6-K Report a foreign issuer made public elsewhere Aug 27, 2026
- 6-K Report a foreign issuer made public elsewhere Aug 19, 2026
- 6-K Report a foreign issuer made public elsewhere Aug 17, 2026
- 6-K Report a foreign issuer made public elsewhere Jul 28, 2026
- 6-K Report a foreign issuer made public elsewhere Jul 27, 2026
- 6-K Report a foreign issuer made public elsewhere Jul 22, 2026
- 6-K Report a foreign issuer made public elsewhere Jun 22, 2026
Prospectuses and Registrations 8 of 132
- POS AM Post-effective amendment to a registration Oct 5, 2026
- POS AM Post-effective amendment to a registration Oct 5, 2026
- POS AM Post-effective amendment to a registration Oct 5, 2026
- 424B3 Prospectus supplement for an offering Aug 27, 2026
- 424B3 Prospectus supplement for an offering Aug 27, 2026
- 424B3 Prospectus supplement for an offering Aug 27, 2026
- 424B3 Prospectus supplement for an offering Aug 27, 2026
- 424B3 Prospectus supplement for an offering Aug 27, 2026
Ownership 8 of 57
- SCHEDULE 13G/A Large holder reported a passive stake, amended Oct 5, 2026
- SCHEDULE 13G/A Large holder reported a passive stake, amended Oct 5, 2026
- SCHEDULE 13G/A Large holder reported a passive stake, amended Oct 2, 2026
- SCHEDULE 13G Large holder reported a passive stake Sep 3, 2026
- SCHEDULE 13D/A Large holder reported an active stake, amended Aug 28, 2026
- SCHEDULE 13G Large holder reported a passive stake Aug 19, 2026
- SCHEDULE 13G/A Large holder reported a passive stake, amended Aug 14, 2026
- SCHEDULE 13G/A Large holder reported a passive stake, amended Aug 14, 2026
Other 8 of 74
- EFFECT Notice that a registration became effective Oct 16, 2026
- EFFECT Notice that a registration became effective Oct 16, 2026
- EFFECT Notice that a registration became effective Oct 16, 2026
- EFFECT Notice that a registration became effective Jul 27, 2026
- F-1/A Registration statement, foreign issuer, amended Jul 23, 2026
- DRS Draft registration statement, submitted confidentially Jul 10, 2026
- EFFECT Notice that a registration became effective May 13, 2026
- EFFECT Notice that a registration became effective May 13, 2026
Everything here comes from C3is Inc.'s own filings on SEC EDGAR. The filing list is rechecked every hour.