C3is Inc. (CISS) Ownership
CISS ownership summary
as of October 17, 2026- Institutions
- 5.5% of shares outstanding
- Insiders
- 9.89% of shares outstanding
- Shares outstanding
- 3.4M
- Float
- 12K shares available to trade
- Short interest
- 0.56% 19K shares short
- Days to cover
- 0.02 short interest down 6.4% vs prior month
- Institutions 5.49%
- Insiders 9.89%
- Other investors 84.62%
CISS top institutional holders
6 largest| # | Holder | % of shares | Shares | Value | Change | Reported |
|---|---|---|---|---|---|---|
| 1 | Towerview LLC | 0.04% | 50K | $26,650 | +50,000 (0.0%) | June 30, 2026 |
| 2 | HRT FINANCIAL LLC | 0.02% | 24K | $13,037 | +24,459 (0.0%) | June 30, 2026 |
| 3 | Integrated Wealth Concepts LLC | 0.00% | 5 | $3 | +5 (0.0%) | June 30, 2026 |
| 4 | Caitong International Asset Management Co., Limited. | 0.00% | 2 | $1 | +2 (0.0%) | June 30, 2026 |
| 5 | Wexford Capital LP | 0.00% | — | — | −5,601 (−100.0%) | March 31, 2026 |
| 6 | Citadel Advisors Llc | 0.00% | — | — | −2,382 (−100.0%) | March 31, 2026 |
Value at the latest close. Change = shares bought or sold in the latest quarterly filing (13F). In the top 6, 4 holders added 74K shares and 2 cut 7,983.
CISS shares outstanding
Year-end shares outstanding, adjusted for splits.
Who owns CISS
Institutional investors own 5.5% of C3is's shares and insiders 9.89%. The largest holder is Towerview LLC with 0.04% of the shares (50K), as of June 30, 2026. Among the top 6 institutions, 4 added shares and 2 reduced their stake in the latest filings. Short interest is 0.56% of the float, or 0.02 days of average trading volume. The share count rose 1,882.8% since 2021.
Related: CISS key metrics. See the CISS stock overview for the latest quote and news.
CISS ownership FAQ
Who owns the most C3is stock?
The largest shareholders of C3is are Towerview LLC (0.04%), HRT FINANCIAL LLC (0.02%), Integrated Wealth Concepts LLC (0.00%), Caitong International Asset Management Co., Limited. (0.00%), Wexford Capital LP (0.00%).
What percentage of C3is is owned by institutions?
Institutions hold 5.5% of C3is's shares outstanding; insiders hold 9.89%.
What is C3is's short interest?
19K shares of C3is were sold short, 0.56% of the float; at the average daily volume it would take 0.02 days to cover.
How many shares of C3is are outstanding?
C3is has 3.4M shares outstanding, of which 12K are in the public float.