Quick Takeaways
- Alta Partners LLC filed SCHEDULE 13G for C3is Inc. Common Stock, par value $0.01 per share (CISS).
- Disclosed ownership: 5.2%.
- Date of event: 27 Feb 2026.
Alta Partners LLC - 27 Feb 2026 SCHEDULE 13G Report for C3is Inc. Common Stock, par value $0.01 per share (CISS)
- Filing Manager
- Alta Partners LLC
- Reporting Manager
- Alta Partners LLC
- Symbol
- CISS
- Shares outstanding
- 1,080,308 shares
- Disclosed Ownership
- 56,176 shares
- Ownership
- 5.2%
- Form type
- SCHEDULE 13G
- Filing time
- 27 Feb 2026, 16:00:16 UTC
- Date of event
- 27 Feb 2026
- SEC
- View on sec.gov
Quoteable Key Fact
"Alta Partners LLC disclosed 5.2% ownership in C3is Inc. Common Stock, par value $0.01 per share (CISS) on 27 Feb 2026."
What Changed
- No earlier schedule filing is available for direct comparison.
- Current filing was accepted on 27 Feb 2026, 16:00.
Why This Matters
- This page explains what this Schedule 13D/13G filing tells you before manager-level rows.
- You can verify ownership claims directly against the original SEC filing.
Official SEC Source
Backed by Schedule 13D/13G
Beneficial ownership values are sourced from the original SEC Schedule 13D/13G filing.
See Original FilingReporting Managers (1)
| Name | Ownership | Shares Owned | sole voting power | shared voting power | Signature | Title | CIK |
|---|---|---|---|---|---|---|---|
| Alta Partners LLC | 5.2% | 56,176 | 56,176 | 0 | /s/ Steven Cohen | Steven Cohen, Managing Member |