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CTRM CASTOR MARITIME INC

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Stock (common), issuer CIK 1720161

18 managers (18 13F filers) reported a position in CTRM shares at 2025-09-30, 374,268 shares in all. 2 filers opened a position and 0 filers sold out during the quarter.

Managers
18
13F filers
18
New
2
Added
3
Reduced
4
Sold out
0
Shares held by filers
374,268

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, Q3 2025

Filers in the available 13F reports with a share position at 2025-09-30, 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$499K0.36%013F-HRTimeline
RENAISSANCE TECHNOLOGIES LLC42,669$88.8K<0.01%+2,00013F-HRTimeline
GOLDMAN SACHS GROUP INCin group GOLDMAN SACHS GROUP INC28,848$60K<0.01%-70613F-HRTimelineGroup
Apriem Advisors19,000$39.5K<0.01%013F-HRTimeline
SUSQUEHANNA INTERNATIONAL GROUP, LLPin group SUSQUEHANNA INTERNATIONAL GRO…15,334$31.9K<0.01%-25,10113F-HRTimelineGroup
SIMPLEX TRADING, LLC13,471$28K<0.01%+1,78213F-HRTimeline
MORGAN STANLEYin group MORGAN STANLEY9,064$18.9K<0.01%-3,40213F-HR/ATimelineGroup
Founders Capital Management2,800$5.82K<0.01%013F-HRTimeline
GROUP ONE TRADING LLC2,591$5.39K<0.01%+21713F-HRTimeline
Larson Financial Group LLC240$499<0.01%new13F-HRTimeline
SBI Securities Co., Ltd.116$241<0.01%-113F-HRTimeline
UBS Group AGin group UBS Group AG51$106<0.01%new13F-HRTimelineGroup
Allworth Financial LP20$42<0.01%013F-HRTimeline
WOLFF WIESE MAGANA LLC20$42<0.01%013F-HRTimeline
Strategic Investment Solutions, Inc. /IL20$42<0.01%013F-HRTimeline
Parallel Advisors, LLC10$21<0.01%013F-HRTimeline
Federation des caisses Desjardins du Qu…10$21<0.01%013F-HRTimeline
Cape Investment Advisory, Inc.4$8<0.01%013F-HRTimeline