Who owns CTRMWhat CTRM owns — n/a

Who owns Castor Maritime Inc.?

Prices and market caps: Cboe delayed data, at least 15 minutes delayed. Not real-time. Fundamentals from company filings.

Institutional ownership of CTRM from SEC Form 13F filings across 25 reporting managers. All positions are from one synchronized reporting period — 2026-06-30 books, filed up to 45 days after quarter end — so every row is comparable.

As of the 2026-06-30 reporting period, 25 institutions disclosed 430,181 shares of Castor Maritime Inc. worth $902,872 — about 4.5% of shares outstanding; the largest disclosed holder is TOWERVIEW LLC. Source: SEC Form 13F filings, parsed by EvidInvest.

13F holders

$902,872

value, 2026 filers

4.5%

of shares outstanding (430,181 sh)

new positions (2026 filers)

Top institutional holders

ordered by shares owned · positions as of 2026-06-30 · % of fund = share of the manager's own book · % of co. = share of CTRM's shares outstanding

#	Manager	Shares	Value	% of fund	% of co.	Δ shares QoQ
1	TOWERVIEW LLC	240,000	$504,000	0.3%	2.5%	0.0%
2	RENAISSANCE TECHNOLOGIES LLC	64,817	$136,116	0.0%	0.7%	-12.3%
3	CITADEL ADVISORS LLCNEW	26,060	$54,465	0.0%	0.3%	new
4	NewEdge Advisors, LLCNEW	21,912	$46,016	0.0%	0.2%	new
5	GOLDMAN SACHS GROUP INC	21,202	$44,524	0.0%	0.2%	+0.6%
6	Apriem Advisors	19,000	$39,900	0.0%	0.2%	0.0%
7	SUSQUEHANNA INTERNATIONAL GROUP, LLPNEW	12,558	$26,246	0.0%	0.1%	new
8	Centiva Capital, LP	12,248	$25,598	0.0%	0.1%	+10.5%
9	SIMPLEX TRADING, LLC	8,510	$17,871	0.0%	0.1%	+44.8%
10	TD Waterhouse Canada Inc.NEW	2,800	$5,886	0.0%	0%	new
11	GROUP ONE TRADING LLC	571	$1,193	0.0%	0%	-14.9%
12	MORGAN STANLEY	254	$533	0.0%	0%	0.0%
13	SBI Securities Co., Ltd.	101	$212	0.0%	0%	0.0%
14	JONES FINANCIAL COMPANIES LLLPNEW	25	$53	0.0%	0%	new
15	WOLFF WIESE MAGANA LLC	20	$42	0.0%	0%	0.0%
16	Allworth Financial LP	20	$42	0.0%	0%	0.0%
17	OSAIC HOLDINGS, INC.NEW	20	$42	0.0%	0%	new
18	Caitong International Asset Management Co., Ltd	16	$34	0.0%	0%	+300.0%
19	Farther Finance Advisors, LLC	15	$32	0.0%	0%	0.0%
20	Federation des caisses Desjardins du Quebec	10	$21	0.0%	0%	0.0%
21	Parallel Advisors, LLC	10	$21	0.0%	0%	0.0%
22	GILL CAPITAL PARTNERS, LLC	6	$13	0.0%	0%	0.0%
23	Cape Investment Advisory, Inc.NEW	4	$8	0.0%	0%	new
24	Steward Partners Investment Advisory, LLCNEW	1	$2	0.0%	0%	new
25	Russell Investments Group, Ltd.	1	$2	0.0%	0%	0.0%

Source: SEC Form 13F-HR filings (institutional managers over $100M in US-listed positions). 13Fs disclose long positions only, up to 45 days after quarter end; each manager's latest filed quarter is shown per row and dollar values are the manager's filed marks. Aggregates labeled "2026 filers" count only managers whose latest book is a 2026 quarter. Related: valuation · options positioning · supply chain. Research, not investment advice.