Who Owns CASTOR MARITIME INC (CTRM)? -- Institutional Holders (2026-03-31)
28 institutions reported holding $910,674 of CASTOR MARITIME INC (CTRM) in SEC 13F filings for 2026-03-31. Largest institutional holders: TOWERVIEW LLC ($444,000), RENAISSANCE TECHNOLOGIES LLC ($136,658), GROUP ONE TRADING LLC ($100,031), CITADEL ADVISORS LLC ($68,635), SUSQUEHANNA INTERNATIONAL GROUP, LLP ($43,845). Source: SEC Form 13F.
| Rank | Institution | Value | Shares | Change |
|---|
| 1 | TOWERVIEW LLC | $444,000 | 240,000 | Hold |
| 2 | RENAISSANCE TECHNOLOGIES LLC | $136,658 | 73,869 | Added |
| 3 | GROUP ONE TRADING LLC | $100,031 | 54,071 | Added |
| 4 | CITADEL ADVISORS LLC | $68,635 | 37,100 | Trimmed |
| 5 | SUSQUEHANNA INTERNATIONAL GROUP, LLP | $43,845 | 23,700 | Trimmed |
| 6 | GOLDMAN SACHS GROUP INC | $39,000 | 21,081 | Trimmed |
| 7 | Apriem Advisors | $35,150 | 19,000 | Hold |
| 8 | Centiva Capital, LP | $20,515 | 11,089 | New |
| 9 | SIMPLEX TRADING, LLC | $17,904 | 9,678 | Added |
| 10 | UBS Group AG | $4,120 | 2,227 | Added |
| 11 | MORGAN STANLEY | $470 | 254 | Trimmed |
| 12 | SBI Securities Co., Ltd. | $187 | 101 | Trimmed |
| 13 | Allworth Financial LP | $37 | 20 | Hold |
| 14 | WOLFF WIESE MAGANA LLC | $37 | 20 | Hold |
| 15 | Farther Finance Advisors, LLC | $27 | 15 | New |
| 16 | Parallel Advisors, LLC | $19 | 10 | Hold |
| 17 | Federation des caisses Desjardins du Quebec | $19 | 10 | Hold |
| 18 | GILL CAPITAL PARTNERS, LLC | $11 | 6 | New |
| 19 | Caitong International Asset Management Co., Ltd | $7 | 4 | New |
| 20 | Russell Investments Group, Ltd. | $2 | 1 | Hold |
| 21 | Virtu Financial LLC | $0 | 0 | Exited |
| 22 | JANE STREET GROUP, LLC | $0 | 0 | Exited |
| 23 | Garton & Associates Financial Advisors LLC | $0 | 0 | Exited |
| 24 | TWO SIGMA SECURITIES, LLC | $0 | 0 | Exited |
| 25 | Tower Research Capital LLC (TRC) | $0 | 0 | Exited |
Source: SEC Form 13F filings · as of 2026-03-31