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CTRM CASTOR MARITIME INC

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Stock (common), issuer CIK 1720161

19 managers (19 13F filers) reported a position in CTRM shares at 2026-03-31, 374,271 shares in all. 4 filers opened a position and 10 filers sold out during the quarter.

Managers
19
13F filers
19
New
4
Added
3
Reduced
4
Sold out
10
Shares held by filers
374,271

Shares held by filers adds up every 13F filer's report, so a share reported by a parent and by its subsidiary counts twice (H9). Managers counts each filer group once.

13D and 13G filers

No 13D or 13G on this security in the data. Structured 13D/G data starts 2024-12-18.

Insider trades

No Form 4 transaction on this security in the data.

13F holders, Q1 2026

Filers in the available 13F reports with a share position at 2026-03-31, filer groups collapsed to one row (method), largest first. Options and principal amounts are left out. A group row states no % of portfolio, since each member reports its own portfolio: the members' percents are listed under it. A value about 1,000 times or 1/1,000 of the price other filers imply is shown as filed but neither ranks the row nor enters a sum.

HolderSharesValue% of portfolioChangeSource
TOWERVIEW LLC240,000$444K0.29%013F-HRTimeline
RENAISSANCE TECHNOLOGIES LLC73,869$137K<0.01%+33,30013F-HRTimeline
GOLDMAN SACHS GROUP INCin group GOLDMAN SACHS GROUP INC21,081$39K<0.01%-7,83013F-HRTimelineGroup
Apriem Advisors19,000$35.1K<0.01%013F-HRTimeline
Centiva Capital, LP11,089$20.5K<0.01%new13F-HRTimeline
SIMPLEX TRADING, LLC5,878$10.9K<0.01%+3,23513F-HRTimeline
UBS Group AGin group UBS Group AG2,227$4.12K<0.01%+1,49113F-HRTimelineGroup
GROUP ONE TRADING LLC671$1.24K<0.01%-2,02013F-HRTimeline
MORGAN STANLEYin group MORGAN STANLEY254$470<0.01%-513F-HRTimelineGroup
SBI Securities Co., Ltd.101$187<0.01%-1513F-HRTimeline
Allworth Financial LP20$37<0.01%013F-HRTimeline
WOLFF WIESE MAGANA LLC20$37<0.01%013F-HRTimeline
Farther Finance Advisors, LLC15$27<0.01%new13F-HRTimeline
Robinswood Financial LLC15$27<0.01%013F-HR/ATimeline
Parallel Advisors, LLC10$19<0.01%013F-HR/ATimeline
Federation des caisses Desjardins du Qu…10$19<0.01%013F-HRTimeline
GILL CAPITAL PARTNERS, LLC6$11<0.01%new13F-HRTimeline
Caitong International Asset Management …4$7<0.01%new13F-HRTimeline
Russell Investments Group, Ltd.in group Russell Investments Group, Lt…1$2<0.01%013F-HRTimelineGroup