CTRM
Castor Maritime Inc.Company with tickers: CTRM
CIK
1720161
CUSIP
Y1146L208
Shares Outstanding
9,662,354
13F Activity (30d)
17 filings
17 filers
Price
$1.89
Market Cap
$18.21M
P/E Ratio
5.24
EPS (Diluted)
$0.36
52W High
$2.65
52W Low
$1.66
Price History
Institutional Holders
Short Volume
Short Interest
Fails to Deliver
Financials
SEC Filings
Earnings Calls
Insider Trades
Congressional Trades
Holders: 20
Total Value: $804,845
Total Shares: 435,056
Institutional Ownership Trend
Holder Concentration
Across 20 13F filers · Δ vs Dec 31, 2025Top Holder
55.2%
+20.3 pts
Top 5
91.0%
+1.8 pts
Top 10
99.9%
+0.8 pts
HHI
3,485
Highly concentrated
+1,153
Quarterly Activity
vs Dec 31, 2025
New
4
Increased
3
Decreased
6
Sold Out
8
Unchanged
7
Holder count:
-4
Institutional value:
-43.5%
Shares held:
-36.8%
Top Buyers
vs Dec 31, 2025| Institution | Added | Now Holds |
|---|---|---|
| Large RENAISSANCE TECHNOLOGIES LLC | +33,300 | 73,869 |
| Mid SIMPLEX TRADING, LLC | +3,235 | 5,878 |
| Mega UBS Group AG | +1,491 | 2,227 |
Top Sellers
vs Dec 31, 2025| Institution | Sold | Now Holds |
|---|---|---|
| Mega CITADEL ADVISORS LLC | −153,957 | 37,100 |
| Mega SUSQUEHANNA INTERNATIONAL GROUP, LLP | −89,618 | 23,700 |
| Mega GOLDMAN SACHS GROUP INC | −7,830 | 21,081 |
| Mid GROUP ONE TRADING LLC | −2,020 | 671 |
| Mid SBI Securities Co., Ltd. | −15 | 101 |
Top New Positions
vs Dec 31, 2025| Institution | Acquired | Value (USD) |
|---|---|---|
| Large Centiva Capital, LP | 11,089 | $20,514 |
| Mid Farther Finance Advisors, LLC | 15 | $27 |
| Micro GILL CAPITAL PARTNERS, LLC | 6 | $11 |
| Small Caitong International Asset Management Co., Ltd | 4 | $7 |
Top Sold-Out Positions
vs Dec 31, 2025| Institution | Previously Held | Last Value (USD) |
|---|---|---|
| Mega JANE STREET GROUP, LLC | 17,898 | $37,047 |
| Small TWO SIGMA SECURITIES, LLC | 17,297 | $35,804 |
| Mid Virtu Financial LLC | 11,852 | $24,533 |
| Micro Garton & Associates Financial Advisors LLC | 2,000 | $4,140 |
| Mid Tower Research Capital LLC (TRC) | 122 | $252 |
| Holder | Value (USD) | % of 13F | Shares | Type | Discretion | Filed | Action | |||
|---|---|---|---|---|---|---|---|---|---|---|
| Small TOWERVIEW LLC | $444,000 | 55.17% | 240,000 | Shares | Sole | 2026-05-05 | View | |||
| Large RENAISSANCE TECHNOLOGIES LLC | $136,657 | 16.98% | 73,869 | Shares | Sole | 2026-05-14 | View | |||
| Mega CITADEL ADVISORS LLC | $68,635 | 8.53% | 37,100 | Call | Defined | 2026-05-15 | View | |||
| Mega SUSQUEHANNA INTERNATIONAL GROUP, LLP | $43,845 | 5.45% | 23,700 | Call | Other | 2026-05-15 | View | |||
| Mega GOLDMAN SACHS GROUP INC | $38,999 | 4.85% | 21,081 | Shares | Defined | 2026-05-15 | View | |||
| Small Apriem Advisors | $35,150 | 4.37% | 19,000 | Shares | Sole | 2026-05-15 | View | |||
| Large Centiva Capital, LP | $20,514 | 2.55% | 11,089 | Shares | Sole | 2026-05-14 | View | |||
| Mid SIMPLEX TRADING, LLC | $10,874 | 1.35% | 5,878 | Shares | Sole | 2026-05-14 | View | |||
| Mega UBS Group AG | $4,119 | 0.51% | 2,227 | Shares | Defined | 2026-05-05 | View | |||
| Mid GROUP ONE TRADING LLC | $1,241 | 0.15% | 671 | Shares | Sole | 2026-05-13 | View | |||
| Mega MORGAN STANLEY | $469 | 0.06% | 254 | Shares | Defined | 2026-05-15 | View | |||
| Mid SBI Securities Co., Ltd. Broker-Dealer | $186 | 0.02% | 101 | Shares | Defined | 2026-04-28 | View | |||
| Small WOLFF WIESE MAGANA LLC | $37 | 0.00% | 20 | Shares | Sole | 2026-04-13 | View | |||
| Mid Allworth Financial LP | $37 | 0.00% | 20 | Shares | Sole | 2026-05-15 | View | |||
| Mid Farther Finance Advisors, LLC | $27 | 0.00% | 15 | Shares | Sole | 2026-04-07 | View | |||
| Mid Parallel Advisors, LLC | $18 | 0.00% | 10 | Shares | Sole | 2026-05-07 | View | |||
| Mid Federation des caisses Desjardins du Quebec | $18 | 0.00% | 10 | Shares | Defined | 2026-05-14 | View | |||
| Micro GILL CAPITAL PARTNERS, LLC | $11 | 0.00% | 6 | Shares | Sole | 2026-04-13 | View | |||
| Small Caitong International Asset Management Co., Ltd | $7 | 0.00% | 4 | Shares | Sole | 2026-05-11 | View | |||
| Large Russell Investments Group, Ltd. | $1 | 0.00% | 1 | Shares | Defined | 2026-05-08 | View | |||
| No holders match your search. | ||||||||||