Schedule 13G ownership disclosure
C3IS INC
Common Stock, par value $0.01 per share · CUSIP: Y18284177
Event date: 2026-02-27
- Filing-level shares
- 56,176.00
- Percent of class
- 5.2%
- Alta Partners LLC
Shares: 56,176.00 · Class: 5.2%
Amounts are as disclosed in this filing. Schedule type alone does not establish investment intent.
Source: SEC EDGAR filingFiling metadata
- Accession number
- 0001896206-26-000004
- Form type
- SCHEDULE 13G
- Filer
- Alta Partners LLC
- CIK
- CIK 1896206
- Filed
- Feb 27, 2026
- Reporting period
- Feb 27, 2026
- Description
- Schedule 13G beneficial ownership