Marex MRX Institutional Ownership

NASDAQ MRX

$70.47 -2.52 (-3.45%)

As of: Aug 24, 2026 · 3:59 PM EDT

Institutions by Trading Activity

202 Institutions

Increased 119 58.9%

Unchanged 23 11.4%

Reduced 60 29.7%

Ownership Statistics

13F · as of 31 Mar, 2026

Institutional Ownership

72.75%

▲+2.96 pp QoQ

Shares Held by Institutions

52.22Mn

of 71.78Mn outstanding

▲+10.03% QoQ

Shares Outstanding

71.78Mn

19.56Mn held outside 13F filers

Institutional Investors

202

filed 13F for Mar 2026

▲+15 vs prior quarter

Net Shares Added (QoQ)

+4.76Mn

accumulated since last quarter

Value of Holdings

$3.75Bn

reported market value

Shares Owned by Institutions

Shares held % of outstanding

Latest —

Average ownership —

Peak ownership —

Shares Purchased/Sold by Institutions

Accumulated Distributed

Latest quarter —

Net over range —

Accumulating quarters —

Ownership Summary

Quarter ending 31 Mar, 2026

Marex Group Ltd (NASDAQ:MRX) has 202 institutional investors that have filed 13F reports for the period ending March 2026.

Their combined ownership stood at 72.8% of outstanding shares in March 2026, up from 69.8% in December 2025.
They increased total shares held in Marex by 10.03% from last quarter, and the number of investors in MRX increased 62.9% annually.
Of these 202 funds, 119 grew their exposure to Marex, 60 cut back, and 23 maintained positions.
In total, institutional investors held 52.22Mn shares in Marex as of March 2026, up by 4.76Mn shares quarter on quarter, and up 23.85Mn shares year over year.
As of March 31, 2026, BlackRock, Inc. held the largest stake in Marex with 4.39Mn shares, accounting for 6.11% of total shares outstanding.
The biggest buyers of Marex for the quarter ending March 2026 included FMR LLC (2.15Mn), PRICE T ROWE ASSOCIATES INC /MD/ (1.91Mn), TWO SIGMA INVESTMENTS, LP (778.44K), VICTORY CAPITAL MANAGEMENT INC (644.79K), SAMLYN CAPITAL, LLC (546.97K).
The biggest sellers of Marex for the quarter ending March 2026 included ADAGE CAPITAL PARTNERS GP, L.L.C. (1.26Mn), BALYASNY ASSET MANAGEMENT L.P. (1.05Mn), THORNBURG INVESTMENT MANAGEMENT INC (693.27K), Grandeur Peak Global Advisors, LLC (454.55K), DEUTSCHE BANK AG\ (448.65K).
Per Business Quant data, the top 10 holders of Marex for the quarter ending March 2026 are BlackRock, Inc. (4.39Mn), Capital International Investors (3.49Mn), FMR LLC (3.48Mn), LOOMIS SAYLES & CO L P (1.92Mn), PRICE T ROWE ASSOCIATES INC /MD/ (1.91Mn), ALLIANCEBERNSTEIN L.P. (1.73Mn), SAMLYN CAPITAL, LLC (1.69Mn), TWO SIGMA INVESTMENTS, LP (1.68Mn), JENNISON ASSOCIATES LLC (1.61Mn), WILLIAM BLAIR INVESTMENT MANAGEMENT, LLC (1.57Mn).

Form 13F Holdings

202 Institutional Holders

Report period 31 Mar, 2026

Total shares held 52.22Mn

Of outstanding 72.75%

#	Institution	CIK	Shares Held	% of Outstanding	Change (QoQ)	Change (%)	Value (USD)
1	BlackRock, Inc.	0002012383	4,389,325	6.11%	▲422,791	+10.66%	$195.68Mn
2	Capital International Investors	0001562230	3,488,093	4.86%	0	0.00%	$155.50Mn
3	FMR LLC	0000315066	3,481,911	4.85%	▲2,147,113	+160.86%	$155.22Mn
4	LOOMIS SAYLES & CO L P	0000312348	1,918,622	2.67%	▼16,881	-0.87%	$85.53Mn
5	PRICE T ROWE ASSOCIATES INC /MD/	0000080255	1,906,029	2.66%	▲1,906,029	0.00%	$84.97K
6	ALLIANCEBERNSTEIN L.P.	0001109448	1,730,125	2.41%	▼20,127	-1.15%	$66.37Mn
7	SAMLYN CAPITAL, LLC	0001421097	1,688,877	2.35%	▲546,966	+47.90%	$75.29Mn
8	TWO SIGMA INVESTMENTS, LP	0001179392	1,681,560	2.34%	▲778,437	+86.19%	$74.96Mn
9	JENNISON ASSOCIATES LLC	0000053417	1,606,691	2.24%	▲131,436	+8.91%	$71.63Mn
10	WILLIAM BLAIR INVESTMENT MANAGEMENT, LLC	0001644956	1,566,181	2.18%	▼172,746	-9.93%	$69.82Mn
11	Invesco Ltd.	0000914208	1,372,768	1.91%	▲77,790	+6.01%	$61.20Mn
12	Grandeur Peak Global Advisors, LLC	0001569137	1,325,195	1.85%	▼454,548	-25.54%	$59.08Mn
13	VICTORY CAPITAL MANAGEMENT INC	0001040188	1,314,816	1.83%	▲644,791	+96.23%	$58.61Mn
14	ROYCE & ASSOCIATES LP	0000906304	1,252,790	1.75%	▼7,919	-0.63%	$55.85Mn
15	Ophir Asset Management Pty Ltd	0001844640	1,246,546	1.74%	▲159,386	+14.66%	$55.57Mn
16	Granahan Investment Management, LLC	0001026710	1,223,750	1.70%	▼153,243	-11.13%	$54.55Mn
17	Artisan Partners Limited Partnership	0001466153	1,216,883	1.70%	▲311,926	+34.47%	$54.25Mn
18	Ameriprise Financial Inc	0000820027	954,242	1.33%	▲94,218	+10.96%	$42.54Mn
19	Allspring Global Investments Holdings, LLC	0001890906	908,596	1.27%	▲93,863	+11.52%	$39.12Mn
20	State Street Corp	0000093751	873,461	1.22%	▲33,925	+4.04%	$38.94Mn

Showing 1 to 20 of 202 holders