Company · CIK 1951067 # C3is Inc. | CIK | [1951067](https://www.sec.gov/cgi-bin/browse-edgar?action=getcompany&CIK=0001951067) (SEC EDGAR) | | --- | --- | | Industry (SIC) | 4412 — Deep Sea Foreign Transportation of Freight | | Incorporated in | 1T | | Business address | Greece | | Listed | CISS (Nasdaq) | | First annual or quarterly report | 2024-04-30 | ## Offerings 7 registrations | Registration | Label and status | First filed | Last event | Filings | | --- | --- | --- | --- | --- | | 333-276430 | IPO Final prospectus | 2024-01-08 | 2026-10-16 | 9 | | 333-276868 | IPO Final prospectus | 2024-02-05 | 2026-10-16 | 11 | | 333-290011 | Registered company Final prospectus | 2025-09-03 | 2026-10-16 | 7 | | 333-297627 | Registered company Final prospectus | 2026-07-22 | 2026-07-28 | 4 | | 333-272939 | IPO Final prospectus | 2023-06-26 | 2026-05-13 | 8 | | 333-285135 | Shelf Effective | 2025-02-21 | 2026-02-25 | 4 | | 333-271228 | IPO Final prospectus | 2023-04-12 | 2023-06-12 | 5 | ## Filings 53 | Filed | Filing | Registration | Accession | | --- | --- | --- | --- | | 2026-10-16 | [EFFECT](https://www.sec.gov/Archives/edgar/data/1951067/999999999526003271/9999999995-26-003271-index.htm) Declared effective | 333-290011 | 9999999995-26-003271 | | 2026-10-16 | [EFFECT](https://www.sec.gov/Archives/edgar/data/1951067/999999999526003267/9999999995-26-003267-index.htm) Declared effective | 333-276868 | 9999999995-26-003267 | | 2026-10-16 | [EFFECT](https://www.sec.gov/Archives/edgar/data/1951067/999999999526003266/9999999995-26-003266-index.htm) Declared effective | 333-276430 | 9999999995-26-003266 | | 2026-07-28 | [424B4](https://www.sec.gov/Archives/edgar/data/1951067/000119312526318972/0001193125-26-318972-index.htm) Final prospectus | 333-297627 | 0001193125-26-318972 | | 2026-07-27 | [EFFECT](https://www.sec.gov/Archives/edgar/data/1951067/999999999526002470/9999999995-26-002470-index.htm) Declared effective | 333-297627 | 9999999995-26-002470 | | 2026-07-23 | [F-1/A](https://www.sec.gov/Archives/edgar/data/1951067/000119312526314070/0001193125-26-314070-index.htm) Amendment | 333-297627 | 0001193125-26-314070 | | 2026-07-22 | [F-1](https://www.sec.gov/Archives/edgar/data/1951067/000119312526312562/0001193125-26-312562-index.htm) Registration filed | 333-297627 | 0001193125-26-312562 | | 2026-07-10 | [DRS](https://www.sec.gov/Archives/edgar/data/1951067/000119312526301049/0001193125-26-301049-index.htm) Draft made public | 377-09558 | 0001193125-26-301049 | | 2026-05-13 | [EFFECT](https://www.sec.gov/Archives/edgar/data/1951067/999999999526001603/9999999995-26-001603-index.htm) Declared effective | 333-290011 | 9999999995-26-001603 | | 2026-05-13 | [EFFECT](https://www.sec.gov/Archives/edgar/data/1951067/999999999526001600/9999999995-26-001600-index.htm) Declared effective | 333-276868 | 9999999995-26-001600 | | 2026-05-13 | [EFFECT](https://www.sec.gov/Archives/edgar/data/1951067/999999999526001599/9999999995-26-001599-index.htm) Declared effective | 333-276430 | 9999999995-26-001599 | | 2026-05-13 | [EFFECT](https://www.sec.gov/Archives/edgar/data/1951067/999999999526001598/9999999995-26-001598-index.htm) Declared effective | 333-272939 | 9999999995-26-001598 | | 2026-02-25 | [424B5](https://www.sec.gov/Archives/edgar/data/1951067/000119312526071752/0001193125-26-071752-index.htm) Shelf takedown | 333-285135 | 0001193125-26-071752 | | 2025-12-18 | [EFFECT](https://www.sec.gov/Archives/edgar/data/1951067/999999999525003823/9999999995-25-003823-index.htm) Declared effective | 333-276868 | 9999999995-25-003823 | | 2025-12-18 | [EFFECT](https://www.sec.gov/Archives/edgar/data/1951067/999999999525003822/9999999995-25-003822-index.htm) Declared effective | 333-276430 | 9999999995-25-003822 | | 2025-12-18 | [EFFECT](https://www.sec.gov/Archives/edgar/data/1951067/999999999525003820/9999999995-25-003820-index.htm) Declared effective | 333-272939 | 9999999995-25-003820 | | 2025-12-11 | [424B4](https://www.sec.gov/Archives/edgar/data/1951067/000119312525316168/0001193125-25-316168-index.htm) Final prospectus | 333-290011 | 0001193125-25-316168 | | 2025-12-10 | [EFFECT](https://www.sec.gov/Archives/edgar/data/1951067/999999999525003623/9999999995-25-003623-index.htm) Declared effective | 333-290011 | 9999999995-25-003623 | | 2025-12-05 | [F-1/A](https://www.sec.gov/Archives/edgar/data/1951067/000119312525309759/0001193125-25-309759-index.htm) Amendment | 333-290011 | 0001193125-25-309759 | | 2025-11-21 | [EFFECT](https://www.sec.gov/Archives/edgar/data/1951067/999999999525003342/9999999995-25-003342-index.htm) Declared effective | 333-276868 | 9999999995-25-003342 | | 2025-11-03 | [F-1/A](https://www.sec.gov/Archives/edgar/data/1951067/000119312525262583/0001193125-25-262583-index.htm) Amendment | 333-290011 | 0001193125-25-262583 | | 2025-10-09 | [424B5](https://www.sec.gov/Archives/edgar/data/1951067/000119312525235139/0001193125-25-235139-index.htm) Shelf takedown | 333-285135 | 0001193125-25-235139 | | 2025-09-03 | [F-1](https://www.sec.gov/Archives/edgar/data/1951067/000119312525194998/0001193125-25-194998-index.htm) Registration filed | 333-290011 | 0001193125-25-194998 | | 2025-07-21 | [DRS](https://www.sec.gov/Archives/edgar/data/1951067/000095012325006492/0000950123-25-006492-index.htm) Draft made public | 377-08236 | 0000950123-25-006492 | | 2025-05-05 | [EFFECT](https://www.sec.gov/Archives/edgar/data/1951067/999999999525001412/9999999995-25-001412-index.htm) Declared effective | 333-276868 | 9999999995-25-001412 | | 2025-05-05 | [EFFECT](https://www.sec.gov/Archives/edgar/data/1951067/999999999525001411/9999999995-25-001411-index.htm) Declared effective | 333-276430 | 9999999995-25-001411 | | 2025-05-05 | [EFFECT](https://www.sec.gov/Archives/edgar/data/1951067/999999999525001407/9999999995-25-001407-index.htm) Declared effective | 333-272939 | 9999999995-25-001407 | | 2025-03-06 | [EFFECT](https://www.sec.gov/Archives/edgar/data/1951067/999999999525000597/9999999995-25-000597-index.htm) Declared effective | 333-285135 | 9999999995-25-000597 | | 2025-02-21 | [F-3](https://www.sec.gov/Archives/edgar/data/1951067/000119312525032047/0001193125-25-032047-index.htm) Shelf registered | 333-285135 | 0001193125-25-032047 | | 2024-12-13 | [EFFECT](https://www.sec.gov/Archives/edgar/data/1951067/999999999524003774/9999999995-24-003774-index.htm) Declared effective | 333-276868 | 9999999995-24-003774 | | 2024-12-13 | [EFFECT](https://www.sec.gov/Archives/edgar/data/1951067/999999999524003773/9999999995-24-003773-index.htm) Declared effective | 333-276430 | 9999999995-24-003773 | | 2024-12-13 | [EFFECT](https://www.sec.gov/Archives/edgar/data/1951067/999999999524003770/9999999995-24-003770-index.htm) Declared effective | 333-272939 | 9999999995-24-003770 | | 2024-05-08 | [EFFECT](https://www.sec.gov/Archives/edgar/data/1951067/999999999524001417/9999999995-24-001417-index.htm) Declared effective | 333-276868 | 9999999995-24-001417 | | 2024-05-08 | [EFFECT](https://www.sec.gov/Archives/edgar/data/1951067/999999999524001416/9999999995-24-001416-index.htm) Declared effective | 333-276430 | 9999999995-24-001416 | | 2024-05-08 | [EFFECT](https://www.sec.gov/Archives/edgar/data/1951067/999999999524001413/9999999995-24-001413-index.htm) Declared effective | 333-272939 | 9999999995-24-001413 | | 2024-03-15 | [424B4](https://www.sec.gov/Archives/edgar/data/1951067/000119312524068660/0001193125-24-068660-index.htm) Final prospectus | 333-276868 | 0001193125-24-068660 | | 2024-03-14 | [EFFECT](https://www.sec.gov/Archives/edgar/data/1951067/999999999524000665/9999999995-24-000665-index.htm) Declared effective | 333-276868 | 9999999995-24-000665 | | 2024-02-23 | [F-1/A](https://www.sec.gov/Archives/edgar/data/1951067/000119312524044556/0001193125-24-044556-index.htm) Amendment | 333-276868 | 0001193125-24-044556 | | 2024-02-05 | [F-1](https://www.sec.gov/Archives/edgar/data/1951067/000119312524024047/0001193125-24-024047-index.htm) Registration filed | 333-276868 | 0001193125-24-024047 | | 2024-01-22 | [424B4](https://www.sec.gov/Archives/edgar/data/1951067/000119312524012266/0001193125-24-012266-index.htm) Final prospectus | 333-276430 | 0001193125-24-012266 | | 2024-01-18 | [EFFECT](https://www.sec.gov/Archives/edgar/data/1951067/999999999524000150/9999999995-24-000150-index.htm) Declared effective | 333-276430 | 9999999995-24-000150 | | 2024-01-08 | [F-1](https://www.sec.gov/Archives/edgar/data/1951067/000119312524004566/0001193125-24-004566-index.htm) Registration filed | 333-276430 | 0001193125-24-004566 | | 2023-09-29 | [DRS](https://www.sec.gov/Archives/edgar/data/1951067/000095012323008622/0000950123-23-008622-index.htm) Draft made public | 377-06902 | 0000950123-23-008622 | | 2023-07-03 | [424B4](https://www.sec.gov/Archives/edgar/data/1951067/000119312523180972/0001193125-23-180972-index.htm) Final prospectus | 333-272939 | 0001193125-23-180972 | | 2023-06-30 | [EFFECT](https://www.sec.gov/Archives/edgar/data/1951067/999999999523001963/9999999995-23-001963-index.htm) Declared effective | 333-272939 | 9999999995-23-001963 | | 2023-06-26 | [F-1](https://www.sec.gov/Archives/edgar/data/1951067/000119312523175217/0001193125-23-175217-index.htm) Registration filed | 333-272939 | 0001193125-23-175217 | | 2023-06-14 | [DRS](https://www.sec.gov/Archives/edgar/data/1951067/000095012323005722/0000950123-23-005722-index.htm) Draft made public | 377-06747 | 0000950123-23-005722 | | 2023-06-12 | [EFFECT](https://www.sec.gov/Archives/edgar/data/1951067/999999999523001722/9999999995-23-001722-index.htm) Declared effective | 333-271228 | 9999999995-23-001722 | | 2023-06-12 | [424B1](https://www.sec.gov/Archives/edgar/data/1951067/000119312523165441/0001193125-23-165441-index.htm) Final prospectus | 333-271228 | 0001193125-23-165441 | | 2023-06-06 | [F-1/A](https://www.sec.gov/Archives/edgar/data/1951067/000119312523161364/0001193125-23-161364-index.htm) Amendment | 333-271228 | 0001193125-23-161364 | | 2023-05-17 | [F-1/A](https://www.sec.gov/Archives/edgar/data/1951067/000119312523146994/0001193125-23-146994-index.htm) Amendment | 333-271228 | 0001193125-23-146994 | | 2023-04-12 | [F-1](https://www.sec.gov/Archives/edgar/data/1951067/000119312523099236/0001193125-23-099236-index.htm) Registration filed | 333-271228 | 0001193125-23-099236 | | 2022-12-07 | [DRS](https://www.sec.gov/Archives/edgar/data/1951067/000095012322012611/0000950123-22-012611-index.htm) Draft made public | 377-06490 | 0000950123-22-012611 | [All filings of this company](https://equitycapital.markets/filings?cik=1951067) · [CSV](https://equitycapital.markets/filings.csv?cik=1951067) --- Source page: https://equitycapital.markets/company/1951067 · Data: U.S. SEC EDGAR · CC BY 4.0