CISS · C3is Inc. · Holdings
Market Cap
$362,210
Shares
274,402
Institutional ownership from SEC Form 13F filings. Investment managers with more than $100 million in U.S. equities must disclose their positions every quarter, within 45 days of quarter-end, so the holdings shown can lag the market by up to a quarter.
Holders: 3
Total Value: $83,043
Total Shares: 74,461
Institutional Ownership Trend
13 quarters
Holder Concentration
Across 3 13F filers · Δ vs Mar 31, 2026Top Holder
99.9%
+30.4 pts
Top 5
100.0%
0.0 pts
Top 10
100.0%
0.0 pts
HHI
9,990
Highly concentrated+4,632
Quarterly Activity
vs Mar 31, 2026
New
2
Increased
1
Decreased
0
Sold Out
2
Unchanged
0
Holder count:
0
Institutional value:
+26774.8%
Shares held:
-15.8%
Top Buyers
vs Mar 31, 2026| Institution | Added | Now Holds | Open |
|---|---|---|---|
| Large HRT FINANCIAL LP | +338 | 611 |
Top Sellers
vs Mar 31, 2026No qualifying movers this quarter.
Top New Positions
vs Mar 31, 2026| Institution | Acquired | Value (USD) | Open |
|---|---|---|---|
| Small TOWERVIEW LLC | 1,250 | $83,000 | |
| Small Caitong International Asset Management Co., Ltd | 0 | $3 |
Top Sold-Out Positions
vs Mar 31, 2026| Institution | Previously Held | Last Value (USD) | Open |
|---|---|---|---|
| Small StoneX Group Inc. | 37 | $215 | |
| Small SUMMIT SECURITIES GROUP LLC | 5 | $31 |
| Holder | Value (USD) | % of 13F | Shares | Type | Filed | Open |
|---|---|---|---|---|---|---|
| Small TOWERVIEW LLC | $83,000 | 99.95% | 50,000 | Shares | 2026-08-04 | |
| Large HRT FINANCIAL LP | $40 | 0.05% | 24,459 | Shares | 2026-08-14 | |
| Small Caitong International Asset Management Co., Ltd | $3 | 0.00% | 2 | Shares | 2026-08-05 |