13F Insight
DOSSIER · 13F Holders · Q2 2026

CASTOR MARITIME INC

27 institutions still hold CASTOR MARITIME INC as of Q2 2026. Tracked across SEC 13F-HR filings, with insider and 13D/G activity surfaced alongside.

CUSIP Y1146L208·27 13F holders·last filed Jun 30, 2026
Market cap
—
13F value held
$1M
visible holders
Holders
27
filers reporting
Concentration
39.53%
TOWERVIEW LLC #1
top holder share
AI Holders Summary · Q2 2026

27 institutions reported CASTOR MARITIME INC in Q2 2026. TOWERVIEW LLC leads at 39.5% of the visible book.

Top holders

Sorted by position value. Source: SEC EDGAR 13F-HR filings.

#HolderValueShares% port.Quarter
01
TOWERVIEW LLC
CIK 0001166573
$504K240K0.33%Q2 202602
CITADEL ADVISORS LLC
CIK 0001423053
$395K191K0.00%Q4 202503
RENAISSANCE TECHNOLOGIES LLC
CIK 0001037389
$136K65K0.00%Q2 202604
SUSQUEHANNA INTERNATIONAL GROUP, LLP
CIK 0001446194· Market maker
$57K27K0.00%Q2 202605
NewEdge Advisors, LLC
CIK 0001633516
$46K22K0.00%Q2 202606
GOLDMAN SACHS GROUP INC
CIK 0000886982
$45K21K0.00%Q2 202607
Apriem Advisors
CIK 0001425165
$40K19K0.00%Q2 202608
Centiva Capital, LP
CIK 0001692507
$26K12K0.00%Q2 202609
SIMPLEX TRADING, LLC
CIK 0001488542
$18K9K0.00%Q2 202610
TD Waterhouse Canada Inc.
CIK 0001999606
$6K3K0.00%Q2 202611
GROUP ONE TRADING LLC
CIK 0000932540
$1K5710.00%Q2 202612
MORGAN STANLEY
CIK 0000895421
$5332540.00%Q2 202613
SBI Securities Co., Ltd.
CIK 0001851815
$2121010.00%Q2 202614
JONES FINANCIAL COMPANIES LLLP
CIK 0000815917
$53250.00%Q2 202615
OSAIC HOLDINGS, INC.
CIK 0001677044
$42200.00%Q2 202616
WOLFF WIESE MAGANA LLC
CIK 0001832097
$42200.00%Q2 202617
Allworth Financial LP
CIK 0001555170
$42200.00%Q2 202618
Caitong International Asset Management Co., Ltd
CIK 0001963355
$34160.00%Q2 202619
Farther Finance Advisors, LLC
CIK 0001992825
$32150.00%Q2 202620
Iron Horse Wealth Management, LLC
CIK 0001836270
$24110.00%Q2 2025
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