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CTRM CASTOR MARITIME INC

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Stock (common), issuer CIK 1720161

25 managers (25 13F filers) reported a position in CTRM shares at 2025-12-31, 493,956 shares in all. 9 filers opened a position and 3 filers sold out during the quarter.

Managers
25
13F filers
25
New
9
Added
4
Reduced
3
Sold out
3
Shares held by filers
493,956

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, Q4 2025

Filers in the available 13F reports with a share position at 2025-12-31, 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$497K0.36%013F-HRTimeline
CITADEL ADVISORS LLCin group CITADEL ADVISORS LLC73,357$152K<0.01%new13F-HRTimelineGroup
RENAISSANCE TECHNOLOGIES LLC40,569$84K<0.01%-2,10013F-HRTimeline
SUSQUEHANNA INTERNATIONAL GROUP, LLPin group SUSQUEHANNA INTERNATIONAL GRO…36,418$75.4K<0.01%+21,08413F-HRTimelineGroup
GOLDMAN SACHS GROUP INCin group GOLDMAN SACHS GROUP INC28,911$59.8K<0.01%+6313F-HR/ATimelineGroup
Apriem Advisors19,000$39.3K<0.01%013F-HRTimeline
JANE STREET GROUP, LLCin group JANE STREET GROUP, LLC17,898$37K<0.01%new13F-HRTimelineGroup
TWO SIGMA SECURITIES, LLC17,297$35.8K<0.01%new13F-HRTimeline
Virtu Financial LLCin group Virtu Financial LLC11,852$25K<0.01%new13F-HRTimelineGroup
GROUP ONE TRADING LLC2,691$5.57K<0.01%+10013F-HRTimeline
SIMPLEX TRADING, LLC2,643$5.47K<0.01%-10,82813F-HRTimeline
Garton & Associates Financial Advisors …2,000$4.14K<0.01%13F-HRTimeline
UBS Group AGin group UBS Group AG736$1.52K<0.01%+68513F-HRTimelineGroup
MORGAN STANLEYin group MORGAN STANLEY259$536<0.01%-8,80513F-HR/ATimelineGroup
Tower Research Capital LLC (TRC)in group Tower Research Capital LLC (T…122$253<0.01%new13F-HRTimelineGroup
SBI Securities Co., Ltd.116$240<0.01%013F-HRTimeline
Allworth Financial LP20$42<0.01%013F-HRTimeline
WOLFF WIESE MAGANA LLC20$42<0.01%013F-HRTimeline
Robinswood Financial LLC15$31<0.01%new13F-HRTimeline
Parallel Advisors, LLC10$21<0.01%013F-HRTimeline
Federation des caisses Desjardins du Qu…10$21<0.01%013F-HRTimeline
JONES FINANCIAL COMPANIES LLLPin group JONES FINANCIAL COMPANIES LLLP6$12<0.01%new13F-HRTimelineGroup
Cape Investment Advisory, Inc.4$8<0.01%013F-HRTimeline
Russell Investments Group, Ltd.in group Russell Investments Group, Lt…1$2<0.01%new13F-HRTimelineGroup
Navalign, LLC1$2<0.01%new13F-HRTimeline