Latest Period
Q1 2026
Security Snapshot
C3is Inc. - Common Stock (CISS) Institutional Ownership
CUSIP: Y18284169
13F Institutional Holders and Ownership History from Q1 2025 to Q1 2026
Institutions Reporting
0
Shares (Excl. Options)
0
Price
$0.14
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- Type / Class
- Equity / Common Stock
- Symbol
- CISS on Nasdaq
- Shares outstanding
- 538,462
- Price per share
- $0.14
- All holders as of 31 Mar 2026
- Q1 2026
- Total 13F shares
- 0
- Total reported value
- $0
- Share change
- -1,046,681
- Value change
- -$240,733
- Number of holders
- 0
Reported Shares, Excluding Options vs Price
Reported Value, Excluding Options
Total Investors
Key facts
- CISS - C3is Inc. - Common Stock is tracked under CUSIP Y18284169.
- 0 institutions reported positions in Q1 2026.
- 8 significant owners is listed from Schedule 13D/13G reporting.
Change
- Holder count moved from 5 to 0 between Q4 2025 and Q1 2026.
- Reported value moved from $240,733 to $0.
Research use
- You can quickly see who holds this security, then open quarter and manager detail pages for full evidence.
- 13F and Schedule 13D/13G sections are kept together so you can cross-check institutional and beneficial ownership context.
Evidence
Source: SEC Form 13F
Open SEC Evidence
Latest holder context comes from 0 institutions filings for Q1 2026.
Security key
Y18284169
Latest holder period
Q1 2026
13F holders
0
13D/G owners
8
CIK / CUSIP context first
Open Q1 2026 holders
CISS full holder history
C3is Inc. SEC filings
C3is Inc. company facts
C3is Inc. insider transactions
Broader feeds
Recent Quarterly Holder Reports
Open recent reporting periods for CUSIP Y18284169:
Significant Owners of C3is Inc. - Common Stock (CISS) based on Schedule 13D/G filings
| Filer | Ownership | Change % | Holdings Value | Net Change | Nb Shares | Change % | Reporting Name | Report Period |
|---|---|---|---|---|---|---|---|---|
| Imperial Petroleum Inc./Marshall Islands | 74% | +21% | $53,415,697 | +$35,040,697 | 36,337,209 | +191% | Imperial Petroleum Inc. | 29 Dec 2025 |
| Evergreen Capital Management LLC/NV | 10% | $762,326 | 443,213 | Evergreen Capital Management LLC | 11 Dec 2025 | |||
| L1 Capital Global Opportunities Master Fund, Ltd. | 10% | $651,523 | 443,213 | L1 Capital Global Opportunities Master Fund, Ltd. | 11 Dec 2025 | |||
| S.H.N. Financial Investments Ltd. | 10% | +243% | $651,523 | +$542,486 | 443,213 | +498% | S.H.N. Financial Investments Ltd. | 11 Dec 2025 |
| Athanasios Tsiakmakis | 5% | -67% | $688,000 | +$421,400 | 400,000 | +158% | Athanasios Tsiakmakis | 09 Jan 2026 |
| Flawless Management Inc. | 3.7% | -43% | $229,316 | 100,577 | 0% | Harry N. Vafias | 09 Oct 2025 | |
| Pandora Consultants II SA | 2.7% | $97,917 | 42,946 | Nikolaos Vafias | 30 Sep 2025 | |||
| TOWERVIEW LLC | 6.5% | $4,900 | 35,000 | TOWERVIEW LLC | 18 May 2026 |
As of 31 Mar 2026, 0 institutional investors reported holding 0 shares of C3is Inc. - Common Stock (CISS). This represents 0% of the company’s total 538,462 outstanding shares.