C3is Inc. SEC filings CISS
C3is Inc. has 321 filings in SEC EDGAR's recent list, going back to Dec 7, 2022. Its latest annual report, Form 20-F, was filed on Apr 22, 2026 for the period ended Dec 31, 2025. The most recent current report (Form 6-K) was filed on Nov 5, 2026. The company's fiscal year ends on December 31.
| Form | Description | Filed | Period |
|---|---|---|---|
| EFFECT | Filing | Oct 16, 2026 | — |
| EFFECT | Filing | Oct 16, 2026 | — |
| EFFECT | Filing | Oct 16, 2026 | — |
| EFFECT | Filing | Jul 27, 2026 | — |
| DRS | Filing | Jul 10, 2026 | — |
| EFFECT | Filing | May 13, 2026 | — |
| EFFECT | Filing | May 13, 2026 | — |
| EFFECT | Filing | May 13, 2026 | — |
| EFFECT | Filing | May 13, 2026 | — |
| EFFECT | Filing | Dec 18, 2025 | — |
| EFFECT | Filing | Dec 18, 2025 | — |
| EFFECT | Filing | Dec 18, 2025 | — |
| EFFECT | Filing | Dec 10, 2025 | — |
| CORRESP | Letter to the SEC | Dec 9, 2025 | — |
| CORRESP | Letter to the SEC | Dec 9, 2025 | — |
| EFFECT | Filing | Nov 21, 2025 | — |
| CORRESP | Letter to the SEC | Nov 3, 2025 | — |
| UPLOAD | Letter from the SEC | Sep 22, 2025 | — |
| CORRESP | Letter to the SEC | Sep 3, 2025 | — |
| UPLOAD | Letter from the SEC | Aug 11, 2025 | — |
| DRSLTR | Filing | Jul 21, 2025 | — |
| DRS | Filing | Jul 21, 2025 | — |
| EFFECT | Filing | May 5, 2025 | — |
| EFFECT | Filing | May 5, 2025 | — |
| EFFECT | Filing | May 5, 2025 | — |
| EFFECT | Filing | Mar 6, 2025 | — |
| CORRESP | Letter to the SEC | Mar 4, 2025 | — |
| UPLOAD | Letter from the SEC | Mar 3, 2025 | — |
| EFFECT | Filing | Dec 13, 2024 | — |
| EFFECT | Filing | Dec 13, 2024 | — |
| EFFECT | Filing | Dec 13, 2024 | — |
| EFFECT | Filing | May 8, 2024 | — |
| EFFECT | Filing | May 8, 2024 | — |
| EFFECT | Filing | May 8, 2024 | — |
| EFFECT | Filing | Mar 14, 2024 | — |
| CORRESP | Letter to the SEC | Mar 14, 2024 | — |
| CORRESP | Letter to the SEC | Mar 14, 2024 | — |
| CORRESP | Letter to the SEC | Mar 14, 2024 | — |
| CORRESP | Letter to the SEC | Mar 14, 2024 | — |
| CORRESP | Letter to the SEC | Mar 11, 2024 | — |
| CORRESP | Letter to the SEC | Mar 11, 2024 | — |
| CORRESP | Letter to the SEC | Feb 23, 2024 | — |
| UPLOAD | Letter from the SEC | Feb 22, 2024 | — |
| EFFECT | Filing | Jan 18, 2024 | — |
| CORRESP | Letter to the SEC | Jan 17, 2024 | — |
| CORRESP | Letter to the SEC | Jan 17, 2024 | — |
| UPLOAD | Letter from the SEC | Jan 16, 2024 | — |
| DRS | Filing | Sep 29, 2023 | — |
| EFFECT | Filing | Jun 30, 2023 | — |
| CORRESP | Letter to the SEC | Jun 28, 2023 | — |
| CORRESP | Letter to the SEC | Jun 28, 2023 | — |
| UPLOAD | Letter from the SEC | Jun 26, 2023 | — |
| DRS | Filing | Jun 14, 2023 | — |
| EFFECT | Filing | Jun 12, 2023 | — |
| CERT | Filing | Jun 12, 2023 | — |
| CORRESP | Letter to the SEC | Jun 8, 2023 | — |
| 8-A12B | Filing | Jun 8, 2023 | — |
| CORRESP | Letter to the SEC | Jun 6, 2023 | — |
| UPLOAD | Letter from the SEC | Jun 1, 2023 | — |
| CORRESP | Letter to the SEC | May 17, 2023 | — |
| UPLOAD | Letter from the SEC | Apr 28, 2023 | — |
| CORRESP | Letter to the SEC | Apr 12, 2023 | — |
| UPLOAD | Letter from the SEC | Feb 13, 2023 | — |
| DRSLTR | Filing | Jan 25, 2023 | — |
| DRS/A | Filing | Jan 25, 2023 | — |
| UPLOAD | Letter from the SEC | Jan 3, 2023 | — |
| DRS | Filing | Dec 7, 2022 | — |
Showing 67 filings. Main filings leave out insider and ownership forms such as Form 4; choose a type above to see them. Each form opens on SEC.gov. Older filings are on SEC EDGAR.
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Company profile
- Industry
- Deep Sea Foreign Transportation of Freight (SIC 4412)
- Listed as
- CISS (Nasdaq)
- Fiscal year ends
- December 31
- Incorporated in
- Marshall Islands
- Headquarters
- Athens, Greece
- SEC filer status
- Non-accelerated filer, Emerging growth company
- SEC CIK
- 1951067
Other Deep Sea Foreign Transportation of Freight companies
- Frontline plc FRO
- Cmb.tech NV CMBT
- Scorpio Tankers Inc. STNG
- TORM plc TRMD
- DHT Holdings, Inc. DHT
- Okeanis Eco Tankers Corp. ECO
- ZIM Integrated Shipping Services Ltd. ZIM
- Star Bulk Carriers Corp. SBLK
Source: SEC EDGAR filings. This is company-reported data, not investment advice.