Castor Maritime Inc. - CTRM
Detailed investor-level table based on 13F positions.
Early Q1 2026 data: only 1 institutional holders reported so far. The full shareholder list will grow as more funds file with the SEC.
Methodology:
Market value and % of portfolio use SEC reported VALUE ($000).
For PUT/CALL positions this reflects reported underlying exposure, not premium cash paid/received.
Details.
Rows: 0
| Investor | History | Status | Shares held | Market value ($000) | % of portfolio | Previous % | Rank | Change in shares | % change in shares | Source | Date reported |
|---|---|---|---|---|---|---|---|---|---|---|---|
| TOWERVIEW LLC | History | No change | 240,000 | 496 | 0.36% | 0.36% | 1 | 0 | 0.0% | Q4 2025 | Feb 04, 2026 |
| CITADEL ADVISORS LLC | History | New | 191,057 | 395 | 0.0% | — | 2 | +191,057 | New | Q4 2025 | Feb 17, 2026 |
| SUSQUEHANNA INTERNATIONAL GROUP, LLP | History | Added to | 113,318 | 234 | 0.0% | 0.0% | 3 | +97,984 | 639.0% | Q4 2025 | Feb 17, 2026 |
| RENAISSANCE TECHNOLOGIES LLC | History | Reduced | 40,569 | 83 | 0.0% | 0.0% | 4 | -2,100 | -4.92% | Q4 2025 | Feb 12, 2026 |
| GROUP ONE TRADING LLC | History | Added to | 28,991 | 60 | 0.0% | 0.0% | 5 | +23,400 | 418.53% | Q4 2025 | Feb 12, 2026 |
| GOLDMAN SACHS GROUP INC | History | Added to | 28,911 | 59 | 0.0% | 0.0% | 6 | +63 | 0.22% | Q4 2025 | Mar 25, 2026 |
| Apriem Advisors | History | No change | 19,000 | 39 | 0.0% | 0.0% | 7 | 0 | 0.0% | Q4 2025 | Feb 13, 2026 |
| JANE STREET GROUP, LLC | History | New | 17,898 | 37 | 0.0% | — | 8 | +17,898 | New | Q4 2025 | Feb 12, 2026 |
| TWO SIGMA SECURITIES, LLC | History | New | 17,297 | 35 | 0.0% | — | 9 | +17,297 | New | Q4 2025 | Feb 17, 2026 |
| Virtu Financial LLC | History | New | 11,852 | 25 | 0.0% | — | 10 | +11,852 | New | Q4 2025 | Feb 23, 2026 |
| SIMPLEX TRADING, LLC | History | Reduced | 4,943 | 10 | 0.0% | 0.0% | 11 | -8,528 | -63.31% | Q4 2025 | Feb 11, 2026 |
| Garton & Associates Financial Advisors LLC | History | New | 2,000 | 4 | 0.0% | — | 12 | +2,000 | New | Q4 2025 | Feb 18, 2026 |
| UBS Group AG | History | Added to | 736 | 1 | 0.0% | — | 13 | +685 | 1343.14% | Q4 2025 | Jan 29, 2026 |
| MORGAN STANLEY | History | Reduced | 259 | 0 | — | 0.0% | — | -8,805 | -97.14% | Q4 2025 | Feb 13, 2026 |
| Founders Capital Management | History | Closed out | 0 | 0 | — | 0.0% | — | -2,800 | -100.0% | Q3 2025 | Nov 13, 2025 |
| Larson Financial Group LLC | History | Closed out | 0 | 0 | — | — | — | -240 | -100.0% | Q3 2025 | Nov 14, 2025 |
| Tower Research Capital LLC (TRC) | History | New | 122 | 0 | — | — | — | +122 | New | Q4 2025 | Feb 17, 2026 |
| Allworth Financial LP | History | New | 20 | 0 | — | — | — | +20 | New | Q4 2025 | Feb 05, 2026 |
| Strategic Investment Solutions, Inc. /IL | History | Closed out | 0 | 0 | — | — | — | -20 | -100.0% | Q3 2025 | Dec 03, 2025 |
| JONES FINANCIAL COMPANIES LLLP | History | New | 6 | 0 | — | — | — | +6 | New | Q4 2025 | Feb 17, 2026 |
| Russell Investments Group, Ltd. | History | New | 1 | 0 | — | — | — | +1 | New | Q4 2025 | Feb 17, 2026 |
| Navalign, LLC | History | New | 1 | 0 | — | — | — | +1 | New | Q4 2025 | Feb 05, 2026 |
| Parallel Advisors, LLC | History | No change | 10 | 0 | — | — | — | 0 | 0.0% | Q4 2025 | Feb 11, 2026 |
| WOLFF WIESE MAGANA LLC | History | No change | 20 | 0 | — | — | — | 0 | 0.0% | Q4 2025 | Jan 14, 2026 |
| SBI Securities Co., Ltd. | History | No change | 116 | 0 | — | — | — | 0 | 0.0% | Q4 2025 | Feb 03, 2026 |
| Cape Investment Advisory, Inc. | History | No change | 4 | 0 | — | — | — | 0 | 0.0% | Q4 2025 | Feb 17, 2026 |
| Federation des caisses Desjardins du Quebec | History | No change | 10 | 0 | — | — | — | 0 | 0.0% | Q4 2025 | Feb 12, 2026 |