Castor Maritime Inc. (CTRM) — Institutional Holders, Q2 2026
25 institutional investment managers reported a CTRM position on SEC Form 13F-HR for the quarter ended June 30, 2026, with a combined reported value of $902.9K. Every filer is listed below, ranked by position value. Put and call option positions are excluded, and a firm filing several lots or share classes is shown once with its total.
CTRM in Q2 2026: what funds did
Funds that filed a 13F for both Q1 2026 and Q2 2026, by what they did with the common stock. Share counts are adjusted for any split between the two quarters; dollar figures are the change in shares at this quarter’s price.
Biggest buyers
- CITADEL ADVISORSNew · +26,060 sh+$54.7K
- NewEdge AdvisorsNew · +21,912 sh+$46.0K
- SUSQUEHANNA INTERNATIONAL GROUP, LLPNew · +12,558 sh+$26.4K
- TD Waterhouse CanadaNew · +2,800 sh+$5.9K
- SIMPLEX TRADINGAdded · +2,632 sh+$5.5K
Biggest sellers
- RENAISSANCE TECHNOLOGIESTrimmed · -9,052 sh-$19.0K
- UBS Group AGSold out · -2,227 sh-$4.7K
- GROUP ONE TRADING, L.P.Trimmed · -100 sh-$210.00
- Robinswood FinancialSold out · -15 sh-$32.00
CTRM 13F holders ranked 1–25 of 25
| # | Institution | Shares | Value | % of portfolio | QoQShares vs Q1 2026 |
|---|---|---|---|---|---|
| 1 | TOWERVIEW#1 · 240,000 sh | 240,000 | $504.0K | 0.33% | 0.0% |
| 2 | RENAISSANCE TECHNOLOGIES#2 · 64,817 sh | 64,817 | $136.1K | <0.01% | -12.3% |
| 3 | CITADEL ADVISORS#3 · 26,060 sh | 26,060 | $54.5K | 0.00% | New |
| 4 | NewEdge Advisors#4 · 21,912 sh | 21,912 | $46.0K | <0.01% | New |
| 5 | GOLDMAN SACHS GROUP#5 · 21,202 sh | 21,202 | $44.5K | 0.00% | +0.6% |
| 6 | Apriem Advisors#6 · 19,000 sh | 19,000 | $39.9K | <0.01% | 0.0% |
| 7 | SUSQUEHANNA INTERNATIONAL GROUP, LLP#7 · 12,558 sh | 12,558 | $26.2K | 0.00% | New |
| 8 | Centiva Capital#8 · 12,248 sh | 12,248 | $25.6K | <0.01% | +10.5% |
| 9 | SIMPLEX TRADING#9 · 8,510 sh | 8,510 | $17.9K | 0.00% | +44.8% |
| 10 | TD Waterhouse Canada#10 · 2,800 sh | 2,800 | $5.9K | — | New |
| 11 | GROUP ONE TRADING, L.P.#11 · 571 sh | 571 | $1.2K | 0.00% | -14.9% |
| 12 | MORGAN STANLEY#12 · 254 sh | 254 | $533.00 | 0.00% | 0.0% |
| 13 | SBI Securities , Ltd.#13 · 101 sh | 101 | $212.00 | — | 0.0% |
| 14 | JONES FINANCIAL COMPANIES LLLP#14 · 25 sh | 25 | $53.00 | 0.00% | New |
| 15 | Allworth Financial#15 · 20 sh | 20 | $42.00 | 0.00% | 0.0% |
| 16 | OSAIC#16 · 20 sh | 20 | $42.00 | 0.00% | New |
| 17 | WOLFF WIESE MAGANA#17 · 20 sh | 20 | $42.00 | — | 0.0% |
| 18 | Caitong International Asset Management , Ltd#18 · 16 sh | 16 | $34.00 | 0.00% | +300.0% |
| 19 | Farther Finance Advisors#19 · 15 sh | 15 | $32.00 | — | 0.0% |
| 20 | GILL CAPITAL PARTNERS#20 · 12 sh | 12 | $26.00 | — | +100.0% |
| 21 | Parallel Advisors#21 · 10 sh | 10 | $21.00 | 0.00% | 0.0% |
| 22 | Federation des caisses Desjardins du Quebec#22 · 10 sh | 10 | $21.00 | 0.00% | 0.0% |
| 23 | Cape Investment Advisory#23 · 4 sh | 4 | $8.00 | — | New |
| 24 | Russell Investments Group, Ltd.#24 · 1 sh | 1 | $2.00 | 0.00% | 0.0% |
| 25 | Steward Partners Investment Advisory#25 · 1 sh | 1 | $2.00 | 0.00% | New |
Funds that sold out of CTRM in Q2 2026 (2)
Held CTRM at the end of Q1 2026 and filed a Q2 2026 13F without it. Not in the list above, because they no longer hold it. Largest prior position first.
| Institution | Shares sold | Value in Q1 2026 |
|---|---|---|
| UBS Group AG2,227 sh | 2,227 | $4.1K |
| Robinswood Financial15 sh | 15 | $28.00 |
Source: Form 13F-HR filings on SEC EDGAR, Q2 2026. Values are as reported by each manager at quarter end. “% of portfolio” is the position’s share of the manager’s total reported 13F value for the same quarter. “New” means the manager filed a 13F for Q1 2026 without this position; a dash means no comparison is available. Where a manager’s own filing is internally inconsistent its value is withheld and it is listed last. 13F data shows reported holdings, not recommendations.