⌘K

MRX Institutional Ownership & 13F Holders | SmartMoneyDB

MRXMAREX GROUP PLC

ORD · CUSIP G5S37H101

Smart Money Ownership

Of the 9 tracked institutions holding MRX, 2 have a 3-year clone track record — 2 of them beat the S&P. Average holder's clone alpha: +5.2pt. It's a gauge of who owns the name, not just how many.

Jim Simons

$11.0M

+7.0pt

PRICE T ROWE ASSOCIATES INC /MD/

$300.1M

+3.5pt

Alpha = the manager's 3-year clone return minus the S&P 500. A skilled roster is a stronger tell than a crowded one — though even skilled managers' edge doesn't reliably survive the 13F disclosure lag. Why →

MRX (MAREX GROUP PLC) Institutional Ownership Summary

Among the 9 tracked institutional investors we monitor, MRX (MAREX GROUP PLC) is held with a combined value of $1.07B across 17,987,701 shares. The largest holder is FMR LLC with a position worth $327.21M (0.01% of their portfolio). 7 funds increased their holdings. 2 funds reduced their position.

Total Institutional Value

$1.07B

Total Shares Held

17,987,701

Institutional Holders

This Quarter's Biggest Movers

Ranked by estimated dollars moved (share change × implied price). 13F data lags up to 45 days.

Biggest Buyers

PRICE T ROWE ASSOCIATES INC /MD/+158% shares~$183.9M FMR LLC+54% shares~$115.0M BlackRock, Inc.+5% shares~$12.6M STATE STREET CORP+18% shares~$9.3M WELLINGTON MANAGEMENT GROUP LLP+18% shares~$7.3M

13F Institutional Holders

Sort

FMR LLC

0.01% of book+54.2%

$327.21M

PRICE T ROWE ASSOCIATES INC /MD/

WELLINGTON MANAGEMENT GROUP LLP

0.01% of book+18.2%

$47.24M

TWO SIGMA ADVISERS, LP

RENAISSANCE TECHNOLOGIES LLC

0.02% of book+123.7%

$10.98M

AQR CAPITAL MANAGEMENT LLC

0.00% of book+30.7%

$2.46M

#	Fund	Value↓	Shares	Portfolio %	Change
1	FMR LLC	$327.21M	5,368,485	0.01%	+54.2%
2	PRICE T ROWE ASSOCIATES INC /MD/	$300.08M	4,923,341	0.03%	+158.3%
3	BlackRock, Inc.	$280.01M	4,594,149	0.00%	+4.7%
4	STATE STREET CORP	$62.58M	1,026,731	0.00%	+17.5%
5	WELLINGTON MANAGEMENT GROUP LLP	$47.24M	775,023	0.01%	+18.2%
6	TWO SIGMA ADVISERS, LP	$26.07M	679,600	0.05%	-15.5%
7	VANGUARD GROUP INC	$15.34M	399,956	0.00%	-14.6%
8	RENAISSANCE TECHNOLOGIES LLC	$10.98M	180,087	0.02%	+123.7%
9	AQR CAPITAL MANAGEMENT LLC	$2.46M	40,329	0.00%	+30.7%

Activist & Large Holders (13D/13G)

Investor	Ownership	Type	Filed
PRICE T ROWE ASSOCIATES INC /MD/	6.8%	13G	2026-08-14
JRJ Investor 1 Limited Partnership	—

Frequently Asked Questions

Which institutional investors own the most MRX stock?

As of the latest SEC 13F filings, FMR LLC is the largest institutional holder of MRX with a position worth $327.21M, representing 0.01% of their portfolio. In total, 9 institutional investors hold MRX with a combined value of $1.07B.

What percentage of MRX is owned by institutional investors?

Institutional investors hold $1.07B worth of MRX stock across 9 positions. The largest institutional holder is FMR LLC with $327.21M in holdings.

What is a 13F filing and why does it matter for MRX?

A 13F filing is a quarterly report required by the SEC from institutional investment managers with over $100 million in assets. It discloses their holdings in U.S. equities. For MRX, these filings reveal which major funds are accumulating or reducing positions, providing insights into institutional sentiment.

Track MRX institutional moves

Get notified when hedge funds change their MRX positions.