Castor MaritimeCTRM
13F holders, Q4 2025 (December 31)At the end of Q4 2025, 25 institutions reported holding Castor Maritime Inc. (CTRM) in their 13F filings, up 7 from Q3 2025. 9 opened new positions and 3 sold out. The largest holders were Towerview LLC ($497K), Citadel Advisors ($152K) and Renaissance Technologies ($84K). 2 famous investors held it, including Ken Griffin (0.0% of Citadel Advisors's portfolio) and 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 Q3 2025 → Q4 2025
| Institutions | Total Value | |
|---|---|---|
| New Positions | 9 | $250K |
| Exits | 3 | $6K |
All 13F filers, Q3 2025 → Q4 2025: 142,481 shares bought and 24,793 shares sold, net +117,688 shares. Counts holders who added, trimmed, opened or closed a position; split-adjusted.
Ownership 25 holders
| Towerview LLC | 0.36% | No change | 240,000 | $497K |
| Citadel Advisors | 0.00% | New | 73,357 | $152K |
| Renaissance Technologies | 0.00% | Reduce -4.9% | 40,569 | $84K |
| Susquehanna International Group, LLP | 0.00% | Add +137.5% | 36,418 | $75K |
| Goldman Sachs Group Inc. | 0.00% | Add +0.2% | 28,911 | $60K |
| Apriem Advisors | 0.00% | No change | 19,000 | $39K |
| Jane Street Group, LLC | 0.00% | New | 17,898 | $37K |
| Two Sigma Securities, LLC | 0.00% | New | 17,297 | $36K |
| Virtu Financial LLC | 0.00% | New | 11,852 | $25K |
| Group One Trading LLC | 0.00% | Add +3.9% | 2,691 | $6K |
| Simplex Trading, LLC | 0.00% | Reduce -80.4% | 2,643 | $5K |
| Garton & Associates Financial Advisors LLC | 0.00% | — | 2,000 | $4K |
| UBS Group AG | 0.00% | Add +1343.1% | 736 | $2K |
| Morgan Stanley | 0.00% | Reduce -97.1% | 259 | $536 |
| Tower Research Capital LLC (TRC) | 0.00% | New | 122 | $253 |
| SBI Securities Co., Ltd. | 0.00% | No change | 116 | $240 |
| Allworth Financial LP | 0.00% | No change | 20 | $42 |
| Wolff Wiese Magana LLC | 0.00% | No change | 20 | $42 |
| Robinswood Financial LLC | 0.00% | New | 15 | $31 |
| Parallel Advisors, LLC | 0.00% | No change | 10 | $21 |
| Federation des caisses Desjardins du Quebec | 0.00% | No change | 10 | $21 |
| Jones Financial Companies LLLP | 0.00% | New | 6 | $12 |
| Cape Investment Advisory, Inc. | 0.00% | No change | 4 | $8 |
| Russell Investments Group, Ltd. | 0.00% | New | 1 | $2 |
| Navalign, LLC | 0.00% | New | 1 | $2 |
"% of holder's portfolio" is CTRM's weight in each manager's 13F, not the share of Castor Maritime Inc. the manager owns.