Who owns MRXWhat MRX owns — n/a

Who owns Marex Group Ltd?

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

Institutional ownership of MRX from SEC Form 13F filings across 227 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, 227 institutions disclosed 57.5M shares of Marex Group Ltd worth $2.51B; the largest disclosed holder is BlackRock, Inc.. Source: SEC Form 13F filings, parsed by EvidInvest.

227

13F holders

$2.51B

value, 2026 filers

57.5M

shares disclosed

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 MRX's shares outstanding

#	Manager	Shares	Value	% of fund	% of co.	Δ shares QoQ
1	BlackRock, Inc.	4.4M	$195.7M	0.0%	—	—
2	Capital International Investors	3.5M	$155.5M	0.0%	—	—
3	FMR LLC	3.5M	$155.2M	0.0%	—	—
4	WASATCH ADVISORS LP	1.7M	$102.6M	0.7%	—	—
5	LOOMIS SAYLES & CO L P	1.9M	$85.5M	0.1%	—	—
6	PRICE T ROWE ASSOCIATES INC /MD/	1.9M	$85.0M	0.0%	—	—
7	SAMLYN CAPITAL, LLC	1.7M	$75.3M	1.3%	—	—
8	TWO SIGMA INVESTMENTS, LP	1.7M	$75.0M	0.1%	—	—
9	WILLIAM BLAIR INVESTMENT MANAGEMENT, LLC	1.6M	$69.8M	0.2%	—	—
10	ALLIANCEBERNSTEIN L.P.	1.7M	$66.4M	0.0%	—	—
11	Invesco Ltd.	1.4M	$61.2M	0.0%	—	—
12	Grandeur Peak Global Advisors, LLC	1.3M	$59.1M	13.8%	—	—
13	VICTORY CAPITAL MANAGEMENT INC	1.3M	$58.6M	0.0%	—	—
14	ROYCE & ASSOCIATES LP	1.3M	$55.8M	0.6%	—	—
15	Ophir Asset Management Pty Ltd	1.2M	$55.6M	6.5%	—	—
16	Granahan Investment Management, LLC	1.2M	$54.6M	2.6%	—	—
17	Artisan Partners Limited Partnership	1.2M	$54.2M	0.1%	—	—
18	QUADRANT CAPITAL GROUP LLC	1,087	$49.0M	0.0%	—	—
19	AMERIPRISE FINANCIAL INC	954,242	$42.5M	0.0%	—	—
20	Allspring Global Investments Holdings, LLC	908,596	$39.1M	0.1%	—	—
21	STATE STREET CORP	873,461	$38.9M	0.0%	—	—
22	JENNISON ASSOCIATES LLC	604,393	$36.8M	0.0%	—	—
23	HEALTHCARE OF ONTARIO PENSION PLAN TRUST FUND	729,000	$32.5M	0.1%	—	—
24	GEODE CAPITAL MANAGEMENT, LLC	726,494	$32.4M	0.0%	—	—
25	WELLINGTON MANAGEMENT GROUP LLP	655,460	$29.2M	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.