# C3is Inc. (CISS) SEC filings and CIK

Canonical: https://sec-api.dev/companies/ciss

> CISS’s SEC CIK is 0001951067 (1951067).

| Filed | Form | Filing |
| --- | --- | --- |
| 2026-11-09 | 424B3 | https://www.sec.gov/Archives/edgar/data/1951067/000119312526452756/0001193125-26-452756-index.htm |
| 2026-11-09 | 424B3 | https://www.sec.gov/Archives/edgar/data/1951067/000119312526452751/0001193125-26-452751-index.htm |
| 2026-11-09 | 424B3 | https://www.sec.gov/Archives/edgar/data/1951067/000119312526452738/0001193125-26-452738-index.htm |
| 2026-11-09 | 6-K | https://www.sec.gov/Archives/edgar/data/1951067/000119312526452731/0001193125-26-452731-index.htm |
| 2026-11-06 | SCHEDULE 13G/A | https://www.sec.gov/Archives/edgar/data/1951067/000159588826000140/0001595888-26-000140-index.htm |

API: GET https://sec-api.dev/api/v1/filings?cik=1951067

---
Independent. Not affiliated with, endorsed by, or sponsored by the U.S. Securities and Exchange Commission. Data is reproduced from public SEC filings and datasets. Not investment advice.
API: https://sec-api.dev/docs · ChatGPT app: https://chatgpt.com/plugins/plugin_asdk_app_6ae0ef2436ac8191941dae8a4d732669 · Free key: https://sec-api.dev/sign-up