MRX Marex Group plc

NASDAQ
$73.00

Marex Group plc (MRX) Hedge Fund Activity

This view isolates hedge funds from the broader institutional ownership shown on the Institutional tab. A pension fund tracking an index may have no view on a stock; when a hedge fund builds or exits a position, that decision can carry information. This page measures those changes. Positions as of June 30, 2026.

Based on quarterly 13F long-equity filings. Changes compare reported quarter-end positions; filings can be reported up to 45 days later and do not represent a fund's complete exposure.

Hedge fund breadth
-15.38
11 buyers / 15 sellers
SELLING
Funds compared
26
funds with comparable MRX positions
19 current holders · 22 prior-quarter holders
Net share change
-581.0K
+1.02M added, -1.60M cut
Position activity
4 new 7 increased 8 reduced 7 exited

Most significant moves

Ranked by conviction, not size — how much of the fund's own book the position represents, how far it moved, and what kind of fund made it.

Fund Action Shares changed Change Est. value Portfolio wt. Score
CITADEL ADVISORS LLC Quant Sold Out -173.5K -100.0% $10.6M 0.0% 62
Tudor Investment Corporation Macro New +372.9K — $22.7M 0.1% 58
ADAGE CAPITAL PARTNERS GP, L.L.C. Sold Out -48.1K -100.0% $2.9M 0.0% 58
RENAISSANCE TECHNOLOGIES LLC Quant Increased +99.6K +123.7% $6.1M 0.0% 54
Alyeska Investment Group, L.P. Increased +227.8K +1346.8% $13.9M 0.0% 54
Man Group Event Long/Short Sold Out -89.2K -100.0% $5.4M 0.0% 54
Jain Global Long/Short Quant New +25.3K — $1.5M 0.0% 54
Verition Fund Management Event Long/Short Sold Out -5.8K -100.0% $351.1K 0.0% 54
Balyasny Asset Management L.P. Reduced -277.9K -80.2% $16.9M 0.0% 50
Walleye Capital Long/Short Quant Increased +248.2K +155.3% $15.1M 0.2% 50

Most significant buyers

By move score, not size.

  • Tudor Investment Corporation New · +372.9K
  • RENAISSANCE TECHNOLOGIES LLC Increased · +99.6K
  • Alyeska Investment Group, L.P. Increased · +227.8K
  • Jain Global New · +25.3K
  • Walleye Capital Increased · +248.2K

Most significant sellers

By move score, not size.

  • CITADEL ADVISORS LLC Sold Out · -173.5K
  • ADAGE CAPITAL PARTNERS GP, L.L.C. Sold Out · -48.1K
  • Man Group Sold Out · -89.2K
  • Verition Fund Management Sold Out · -5.8K
  • Balyasny Asset Management L.P. Reduced · -277.9K

Hedge fund positions

Fund Tier Shares Previous Change Change % Portfolio wt. Action Score
CITADEL ADVISORS LLC 1 0 173.5K -173.5K -100.0% 0.0% Sold Out 62
Tudor Investment Corporation 2 372.9K 0 +372.9K — 0.1% New 58
ADAGE CAPITAL PARTNERS GP, L.L.C. 2 0 48.1K -48.1K -100.0% 0.0% Sold Out 58
RENAISSANCE TECHNOLOGIES LLC 1 180.1K 80.5K +99.6K +123.7% 0.0% Increased 54
Alyeska Investment Group, L.P. 2 244.7K 16.9K +227.8K +1346.8% 0.0% Increased 54
Man Group 3 0 89.2K -89.2K -100.0% 0.0% Sold Out 54
Jain Global 3 25.3K 0 +25.3K — 0.0% New 54
Verition Fund Management 2 0 5.8K -5.8K -100.0% 0.0% Sold Out 54
Balyasny Asset Management L.P. 2 68.8K 346.7K -277.9K -80.2% 0.0% Reduced 50
Walleye Capital 3 408.0K 159.8K +248.2K +155.3% 0.2% Increased 50
CenterBook Partners 4 4.5K 0 +4.5K — 0.0% New 49
Winton Group 4 0 13.5K -13.5K -100.0% 0.0% Sold Out 48
Centiva Capital 4 0 14.8K -14.8K -100.0% 0.0% Sold Out 48
Voloridge Investment Management 2 30.6K 224.5K -193.9K -86.4% 0.0% Reduced 48
Engineers Gate 4 0 14.9K -14.9K -100.0% 0.0% Sold Out 48
Quantbot Technologies 4 5.4K 0 +5.4K — 0.0% New 45
Y-Intercept 4 26.9K 6.0K +21.0K +352.3% 0.0% Increased 44
Samlyn Capital 2 1.5M 1.7M -205.6K -12.2% 1.5% Reduced 41
MARSHALL WACE, LLP 2 74.7K 125.5K -50.8K -40.5% 0.0% Reduced 37
TWO SIGMA INVESTMENTS, LP 2 1.3M 1.7M -346.1K -20.6% 0.1% Reduced 35
Qube Research & Technologies Ltd 2 449.4K 592.6K -143.2K -24.2% 0.0% Reduced 32
Aquatic Capital Management 4 17.7K 36.5K -18.9K -51.6% 0.0% Reduced 32
AQR Capital Management 3 40.3K 30.9K +9.5K +30.7% 0.0% Increased 27
Squarepoint Ops LLC 2 56.7K 64.1K -7.4K -11.6% 0.0% Reduced 26
Hudson Bay Capital Management 3 228.7K 224.1K +4.6K +2.1% 0.1% Increased 23
Trexquant Investment 3 55.3K 51.4K +3.9K +7.6% 0.0% Increased 22

Every fund above opens. Subscribers can see any manager's whole portfolio — every position, its weight, and what they bought, trimmed and exited last quarter.

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Hedge funds are identified from their 13F filings, which are due 45 days after quarter end and cover long U.S.-listed equity positions only. A fund's short book never appears, so a reduced position can mean a changed view or a changed hedge — the filing doesn't say which.