C3IS INC COM COM is a security (CUSIP Y18284300) tracked across SEC portfolio filings. 2 institutional managers reported $83K on Form 13F as of 2026-06-30.
| Manager | Location | Value | Shares |
|---|---|---|---|
| TOWERVIEW LLC | NEW YORK, NY | $83K | 50,000 |
| Caitong International Asset Management Co., Ltd | HONG KONG, K3 | $3 | 2 |