🕵️ C3IS Inc. ($CISS)
SEC insider & ownership activity, last 12 months · CIK 1951067 · every row links its SEC filing
Insiders were quiet over the last 12 months – no open-market buys or sells. Imperial Petroleum Inc. added 68.8% → 80.5%; Athanasios Tsiakmakis trimmed 14.4% → 5.0%. No red-flag 8-Ks in the window.
Insider flow
0 buyers, $0 (0 lots) · 0 sellers, $0 (0 lots)
No open-market insider transactions in the last 12 months.
5%+ holders
| Holder | Stake | Class | Schedule | Event | |
|---|---|---|---|---|---|
| Imperial Petroleum Inc. | 80.5% | 13D | Aug 26, 2026 | filing ↗ | |
| Ascent Partners Fund LLC | 10.0% | 13G | Aug 4, 2026 | filing ↗ | |
| Ascent Partners LLC | 10.0% | 13G | Aug 4, 2026 | filing ↗ | |
| Dominion Capital LLC | 10.0% | 13G | Aug 4, 2026 | filing ↗ | |
| Dominion Capital GP LLC | 10.0% | 13G | Aug 4, 2026 | filing ↗ | |
| Eagle CLAW Corp. | 10.0% | 13G | Aug 4, 2026 | filing ↗ | |
| Masada Group Holdings LLC | 10.0% | 13G | Aug 4, 2026 | filing ↗ | |
| Mikhail Gurevich | 10.0% | 13G | Aug 4, 2026 | filing ↗ | |
| Gennadiy Gurevich | 10.0% | 13G | Aug 4, 2026 | filing ↗ | |
| Alon Brenner | 10.0% | 13G | Aug 4, 2026 | filing ↗ | |
| Ayrton Capital LLC | 10.0% | 13G | Feb 11, 2026 | filing ↗ | |
| ALTO Opportunity Master Fund, SPC - Segregated Master Portfolio B | 10.0% | 13G | Feb 11, 2026 | filing ↗ | |
| Waqas Khatri | 10.0% | 13G | Feb 11, 2026 | filing ↗ | |
| LIND Global Fund III LP | 10.0% | 13G | Jul 31, 2026 | filing ↗ | |
| LIND Global Partners III LLC | 10.0% | 13G | Jul 31, 2026 | filing ↗ | |
| Easton Jeff | 10.0% | 13G | Jul 31, 2026 | filing ↗ | |
| CVI Investments, Inc. | 9.9% | 13G | Aug 3, 2026 | filing ↗ | |
| Heights Capital Management, Inc. | 9.9% | 13G | Aug 3, 2026 | filing ↗ | |
| Timothy P. Horne | 9.1% | 13G | Sep 3, 2026 | filing ↗ | |
| ALTA Partners LLC | 8.2% | 13G | Aug 3, 2026 | filing ↗ | |
| JANE Street Group, LLC | 7.2% | 13G | Aug 19, 2026 | filing ↗ | |
| Wexford Capital LP | 7.0% | 13G | Sep 29, 2025 | filing ↗ | |
| Wexford GP LLC | 7.0% | 13G | Sep 29, 2025 | filing ↗ | |
| Charles Davidson | 7.0% | 13G | Sep 29, 2025 | filing ↗ | |
| Joseph Jacobs | 7.0% | 13G | Sep 29, 2025 | filing ↗ | |
| Towerview LLC | 6.5% | 13G | May 18, 2026 | filing ↗ | |
| JANE Street Capital, LLC | 5.2% | 13G | Aug 19, 2026 | filing ↗ | |
| Athanasios Tsiakmakis | 5.0% | 13G | Jan 13, 2026 | filing ↗ | |
| JANE Street Global Trading, LLC | exited | 13G | Aug 19, 2026 | filing ↗ |
Planned insider sales (Form 144)
No sale notices filed in the last 12 months.
Material events (8-K)
No 8-K filings in the last 12 months.