Castor Maritime Inc.
CTRM- Exchange
- Nasdaq
- Industry
- Deep Sea Foreign Transportation of Freight
- SEC CIK
- 0001720161
No open-market purchases or sales by Castor Maritime Inc. insiders were filed in the last 90 days; 25 institutions reported holding it in 13F filings for Q2 2026, worth $902.9K in total; no superinvestor holds it.
13F holders, Q4 2025
Institutional positions in Castor Maritime Inc. as of Dec 31, 2025. Investment managers with $100 million or more in US stocks report their long positions on Form 13F within 45 days after each quarter ends. How 13F works
- Institutional holders
- 25
- +7 vs. Q3 2025
- Shares held
- 494.0K
- +119.7K (+32.0%) vs. Q3 2025
- Total value
- $1.02M
- +$244.5K (+31.4%) vs. Q3 2025
- New holders
- 10
- 4 more added
- Sold out
- 3
- 3 more reduced
Compare with Q3 2025: new holders, sold out and not filed yet
Holders and value by quarter
Institutions reporting CTRM on Form 13F each quarter since Q1 2021, and the total value they reported. Values are as of each quarter end, so they also move with the share price.
| Quarter | Holders | Value |
|---|---|---|
| Q2 2026 | 25 | $902.9K |
| Q1 2026 | 19 | $692.4K |
| Q4 2025 | 25 | $1.02M |
| Q3 2025 | 18 | $778.5K |
| Q2 2025 | 17 | $852.6K |
| Q1 2025 | 16 | $925.1K |
| Q4 2024 | 17 | $1.08M |
| Q3 2024 | 22 | $658.9K |
| Q2 2024 | 22 | $577.8K |
| Q1 2024 | 20 | $329.0K |
| Q4 2023 | 30 | $443.5K |
| Q3 2023 | 28 | $392.7K |
| Q2 2023 | 27 | $398.9K |
| Q1 2023 | 29 | $1.48M |
| Q4 2022 | 33 | $1.91M |
| Q3 2022 | 28 | $1.44M |
| Q2 2022 | 32 | $1.95M |
| Q1 2022 | 28 | $1.68M |
| Q4 2021 | 29 | $5.60M |
| Q3 2021 | 33 | $6.66M |
| Q2 2021 | 31 | $12.2M |
| Q1 2021 | 40 | $7.71M |
Institutions, Q4 2025
Shares, value and share of portfolio for each institution holding Castor Maritime Inc.; share changes are against Q3 2025.
| Institution | Shares | Value | % of portfolio | Change in shares | Action |
|---|---|---|---|---|---|
| Towerview LLC | 240,000 | $496.8K | 0.36% | 00.0% | Unchanged |
| Citadel Advisors LLC | 73,357 | $151.8K | 0.00% | +73,357 | New |
| Renaissance Technologies LLC | 40,569 | $84.0K | 0.00% | −2,100−4.9% | Reduced |
| Susquehanna International Group, LLP | 36,418 | $75.4K | 0.00% | +21,084+137.5% | Added |
| Goldman Sachs Group Inc | 28,911 | $59.8K | 0.00% | +63+0.2% | Added |
| Apriem Advisors | 19,000 | $39.3K | 0.00% | 00.0% | Unchanged |
| Jane Street Group, LLC | 17,898 | $37.0K | 0.00% | +17,898 | New |
| Two Sigma Securities, LLC | 17,297 | $35.8K | 0.00% | +17,297 | New |
| Virtu Financial LLC | 11,852 | $25.0K | 0.00% | +11,852 | New |
| Group One Trading, L.P. | 2,691 | $5.57K | 0.00% | +100+3.9% | Added |
| Simplex Trading, LLC | 2,643 | $5.47K | 0.00% | −10,828−80.4% | Reduced |
| Garton & Associates Financial Advisors LLC | 2,000 | $4.14K | 0.00% | +2,000 | New |
| UBS Group AG | 736 | $1.52K | 0.00% | +685+1,343.1% | Added |
| Morgan Stanley | 259 | $536 | 0.00% | −8,805−97.1% | Reduced |
| Tower Research Capital LLC (TRC) | 122 | $253 | 0.00% | +122 | New |
| SBI Securities Co., Ltd. | 116 | $240 | 0.00% | 00.0% | Unchanged |
| Allworth Financial LP | 20 | $42 | 0.00% | 00.0% | Unchanged |
| Wolff Wiese Magana LLC | 20 | $42 | 0.00% | 00.0% | Unchanged |
| Robinswood Financial LLC | 15 | $31 | 0.00% | +15 | New |
| Parallel Advisors, LLC | 10 | $21 | 0.00% | 00.0% | Unchanged |
| Federation des caisses Desjardins du Quebec | 10 | $21 | 0.00% | 00.0% | Unchanged |
| Jones Financial Companies LLLP | 6 | $12 | 0.00% | +6 | New |
| Cape Investment Advisory, Inc. | 4 | $8 | 0.00% | 00.0% | Unchanged |
| Russell Investments Group, Ltd. | 1 | $2 | 0.00% | +1 | New |
| Navalign, LLC | 1 | $2 | 0.00% | +1 | New |
| Founders Capital Management | 0 | $0 | 0.00% | −2,800−100.0% | Sold out |
| Larson Financial Group LLC | 0 | $0 | 0.00% | −240−100.0% | Sold out |
| Strategic Investment Solutions, Inc. | 0 | $0 | 0.00% | −20−100.0% | Sold out |