Live feed
Filing
SCHEDULE 13G/A
SCHEDULE 13G/A0000898432-26-000030·Athanasios Tsiakmakis
Schedule 13G ownership disclosure
C3IS INC
Common Stock, par value $0.01 per share · CUSIP: Y18284169
Event date: 2026-01-09
- Filing-level shares
- 400,000
- Percent of class
- 5.02%
- Athanasios Tsiakmakis
Shares: 400,000 · Class: 5.02%
Amounts are as disclosed in this filing. Schedule type alone does not establish investment intent.
Source: SEC EDGAR filingFiling metadata
- Accession number
- 0000898432-26-000030
- Form type
- SCHEDULE 13G/A
- Filer
- Athanasios Tsiakmakis
- CIK
- CIK 2093911
- Filed
- Jan 13, 2026
- Reporting period
- Jan 09, 2026
- Description
- Schedule 13G beneficial ownership