Castor MaritimeCTRM
13F holders, Q3 2025 (September 30)18holders +1
2new positions
0sold out
1famous investor
$2.08avg. 13F price*
At the end of Q3 2025, 18 institutions reported holding Castor Maritime Inc. (CTRM) in their 13F filings, up 1 from Q2 2025. 2 opened new positions and 0 sold out. The largest holders were Towerview LLC ($499K), Renaissance Technologies ($89K) and Goldman Sachs Group Inc. ($60K). One famous investor held it Jim Simons / Peter Brown (0.0% of Renaissance Technologies's portfolio).
- Company
- Castor Maritime Inc.
- CUSIP
- Y1146L208
- Latest filing quarter
- Q2 2026
History
Number of 13F holders
Total Exit/New Position Q2 2025 → Q3 2025
| Institutions | Total Value | |
|---|---|---|
| New Positions | 2 | $605 |
| Exits | 0 | $0 |
All 13F filers, Q2 2025 → Q3 2025: 4,290 shares bought and 29,210 shares sold, net −24,920 shares. Counts holders who added, trimmed, opened or closed a position; split-adjusted.
Ownership 18 holders
| Towerview LLC | 0.36% | No change | 240,000 | $499K |
| Renaissance Technologies | 0.00% | Add +4.9% | 42,669 | $89K |
| Goldman Sachs Group Inc. | 0.00% | Reduce -2.4% | 28,848 | $60K |
| Apriem Advisors | 0.00% | No change | 19,000 | $40K |
| Susquehanna International Group, LLP | 0.00% | Reduce -62.1% | 15,334 | $32K |
| Simplex Trading, LLC | 0.00% | Add +15.3% | 13,471 | $28K |
| Morgan Stanley | 0.00% | Reduce -27.3% | 9,064 | $19K |
| Founders Capital Management | 0.00% | No change | 2,800 | $6K |
| Group One Trading LLC | 0.00% | Add +9.1% | 2,591 | $5K |
| Larson Financial Group LLC | 0.00% | New | 240 | $499 |
| SBI Securities Co., Ltd. | 0.00% | Reduce -0.8% | 116 | $241 |
| UBS Group AG | 0.00% | New | 51 | $106 |
| Allworth Financial LP | 0.00% | No change | 20 | $42 |
| Wolff Wiese Magana LLC | 0.00% | No change | 20 | $42 |
| Strategic Investment Solutions, Inc. | 0.00% | No change | 20 | $42 |
| Parallel Advisors, LLC | 0.00% | No change | 10 | $21 |
| Federation des caisses Desjardins du Quebec | 0.00% | No change | 10 | $21 |
| Cape Investment Advisory, Inc. | 0.00% | No change | 4 | $8 |
"% of holder's portfolio" is CTRM's weight in each manager's 13F, not the share of Castor Maritime Inc. the manager owns.