CTRM · Castor Maritime Inc. · Holdings
Market Cap
$23.38M
Shares
9.66M
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: 25
Total Value: $976,454
Total Shares: 464,981
Institutional Ownership Trend
26 quarters
Holder Concentration
Across 25 13F filers · Δ vs Mar 31, 2026Top Holder
51.6%
−3.5 pts
Top 5
86.1%
−4.9 pts
Top 10
99.8%
−0.1 pts
HHI
3,061
Highly concentrated−424
Quarterly Activity
vs Mar 31, 2026
New
6
Increased
6
Decreased
2
Sold Out
2
Unchanged
11
Holder count:
+4
Institutional value:
+21.3%
Shares held:
+6.9%
Top Buyers
vs Mar 31, 2026| Institution | Added | Now Holds | Open |
|---|---|---|---|
| Mega CITADEL ADVISORS LLC | +8,860 | 45,960 | |
| Mega SUSQUEHANNA INTERNATIONAL GROUP, LLP | +3,758 | 27,458 | |
| Mid SIMPLEX TRADING, LLC | +2,632 | 8,510 | |
| Mid Centiva Capital, LP | +1,159 | 12,248 | |
| Mega GOLDMAN SACHS GROUP INC | +121 | 21,202 |
Top Sellers
vs Mar 31, 2026| Institution | Sold | Now Holds | Open |
|---|---|---|---|
| Large RENAISSANCE TECHNOLOGIES LLC | −9,052 | 64,817 | |
| Mid GROUP ONE TRADING LLC | −100 | 571 |
Top New Positions
vs Mar 31, 2026| Institution | Acquired | Value (USD) | Open |
|---|---|---|---|
| Large NewEdge Advisors, LLC | 21,912 | $46,015 | |
| Large TD Waterhouse Canada Inc. | 2,800 | $5,880 | |
| Large JONES FINANCIAL COMPANIES LLLP | 25 | $52 | |
| Large OSAIC HOLDINGS, INC. | 20 | $42 | |
| Small Cape Investment Advisory, Inc. | 4 | $8 |
Top Sold-Out Positions
vs Mar 31, 2026| Institution | Previously Held | Last Value (USD) | Open |
|---|---|---|---|
| Mega UBS Group AG | 2,227 | $4,119 | |
| Micro Robinswood Financial LLC | 15 | $27 |