C3is Inc.
CISSNasdaqIndustrials · Deep Sea Foreign Transportation of Freight · 1T · SEC filings ↗ · Compare ⊕
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SEC XBRL · annualNo structured XBRL financials available (common for pre-2009 filers, foreign issuers, or companies that never reported as a US public company).
5%+ owners
SEC Schedule 13D / 13G · last 3 yrs- Towerview LlcPassive (13G)May 18, 2026
- Evergreen Capital Management Llc/NvPassive (13G)May 11, 2026
- Imperial Petroleum Inc./Marshall IslandsActivist (13D)May 6, 2026
- Alta Partners LlcPassive (13G)Feb 27, 2026
- Ayrton Capital LlcPassive (13G)Feb 11, 2026
- Athanasios TsiakmakisPassive (13G)Jan 13, 2026
- S.H.N. Financial Investments Ltd.Passive (13G)Dec 18, 2025
- L1 Capital Global Opportunities Master Fund, Ltd.Passive (13G)Dec 17, 2025
- Flawless Management Inc.Activist (13D)Oct 10, 2025
- Pandora Consultants Ii SaPassive (13G)Oct 2, 2025
- Wexford Capital LpPassive (13G)Sep 29, 2025
Holders who disclosed a 5%+ stake. 13D signals intent to influence or control; 13G is a passive holding. Latest filing per holder — open it for the exact stake.
Short interest
FINRA · bi-monthly| Settlement | Shares short | Days to cover | Δ vs prior |
|---|---|---|---|
| May 15, 2026 | 104,053 | 3.1 | +22.4% |
| Apr 30, 2026 | 84,980 | 1.1 | +699.4% |
| Apr 15, 2026 | 10,631 | 1.0 | -81.8% |
| Mar 31, 2026 | 58,387 | 1.0 | -3.7% |
| Mar 13, 2026 | 60,614 | 1.0 | -75.9% |
Shares sold short as reported to FINRA. Days-to-cover = short shares ÷ average daily volume — higher means more potential squeeze pressure.
Recent SEC filings
All filings ↗- 424B3May 18, 2026
- 424B3May 18, 2026
- 424B3May 18, 2026
- 424B3May 18, 2026
- 6-KMay 18, 2026
- SCHEDULE 13GMay 18, 2026
- EFFECTMay 13, 2026
- EFFECTMay 13, 2026
- EFFECTMay 13, 2026
- EFFECTMay 13, 2026
- SCHEDULE 13G/AMay 11, 2026
- SCHEDULE 13D/AMay 6, 2026
- POS AMMay 5, 2026
- POS AMMay 5, 2026
- POS AMMay 5, 2026
Event-driven situations (2)
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