Marex UK HoldingsMRX
13F holders, Q3 2025 (September 30)191holders −3
45new positions
48sold out
6famous investors
$33.57avg. 13F price*
At the end of Q3 2025, 191 institutions reported holding Marex UK Holdings Ltd. (MRX) in their 13F filings, down 3 from Q2 2025. 45 opened new positions and 48 sold out. The largest holders were BlackRock, Inc. ($124.9M), Capital International Investors ($117.3M) and Loomis Sayles & Co. L P ($60.1M). 6 famous investors held it, including Paul Tudor Jones (0.0% of Tudor Investment Corporation's portfolio), Jim Simons / Peter Brown (0.0% of Renaissance Technologies's portfolio) and Ken Griffin (0.0% of Citadel Advisors's portfolio).
- Company
- Marex UK Holdings Ltd.
- Filed as
- MAREX GROUP PLC (Q3 2025)
- CUSIP
- G5S37H101
- Latest filing quarter
- Q2 2026
History
Number of 13F holders
Total Exit/New Position Q2 2025 → Q3 2025
| Institutions | Total Value | |
|---|---|---|
| New Positions | 45 | $68.1M |
| Exits | 48 | $165.2M |
All 13F filers, Q2 2025 → Q3 2025: 12,107,311 shares bought and 10,791,597 shares sold, net +1,315,714 shares. Counts holders who added, trimmed, opened or closed a position; split-adjusted.
Ownership 191 holders
| BlackRock, Inc. | 0.00% | Add +46.8% | 3,715,680 | $124.9M |
| Capital International Investors | 0.02% | No change | 3,488,093 | $117.3M |
| Loomis Sayles & Co. L P | 0.07% | Add +1.1% | 1,786,767 | $60.1M |
| Grandeur Peak Global Advisors, LLC | 7.91% | Add +17.8% | 1,753,821 | $59.0M |
| Alliancebernstein L.P. | 0.02% | Add +16.4% | 1,558,926 | $52.4M |
| Jennison Associates LLC | 0.03% | Add +1.8% | 1,453,778 | $48.9M |
| Royce & Associates LP | 0.48% | Add +48.0% | 1,418,932 | $47.7M |
| Adage Capital Partners Gp, L.L.C. | 0.07% | Add +23.5% | 1,332,500 | $44.8M |
| Invesco Ltd. | 0.01% | Reduce -25.6% | 1,212,717 | $40.8M |
| T. Rowe Price Associates Inc. | 0.00% | Add +7518.1% | 1,211,193 | $40.7M |
| Balyasny Asset Management L.P. | 0.08% | Add +129.4% | 1,201,588 | $40.4M |
| Healthcare of Ontario Pension Plan Trust Fund | 0.07% | Add +49.2% | 1,074,200 | $36.1M |
| Granahan Investment Management, LLC | 1.45% | Reduce -49.2% | 1,054,954 | $35.5M |
| Thornburg Investment Management Inc. | 0.46% | Add +27.6% | 1,049,351 | $35.3M |
| Qube Research & Technologies Ltd | 0.05% | Add +59.3% | 1,039,550 | $34.9M |
| Jefferies Financial Group Inc. | 0.32% | Reduce -3.8% | 1,000,000 | $33.6M |
| Two Sigma Investments, LP | 0.05% | Reduce -11.8% | 934,221 | $31.4M |
| Ameriprise Financial Inc. | 0.01% | Add +2.5% | 873,378 | $29.4M |
| Two Sigma Advisers, LP | 0.05% | Reduce -12.2% | 803,900 | $27.0M |
| Samlyn Capital, LLC | 0.38% | Add +64.0% | 798,227 | $26.8M |
| State Street Corp. | 0.00% | Add +93.0% | 793,603 | $26.7M |
| Morgan Stanley | 0.00% | Reduce -38.0% | 792,710 | $26.7M |
| FMR LLC | 0.00% | Add +390.8% | 756,386 | $25.4M |
| JPMorgan Chase & Co. | 0.00% | Reduce -4.2% | 744,921 | $25.0M |
| Allspring Global Investments Holdings, LLC | 0.04% | Add +17.0% | 815,306 | $25.0M |
| Geode Capital Management, LLC | 0.00% | Add +57.7% | 700,747 | $23.6M |
| Principal Financial Group Inc. | 0.01% | Reduce -14.4% | 675,385 | $22.7M |
| Royal Bank of Canada | 0.00% | Add +6.7% | 675,412 | $22.7M |
| Voloridge Investment Management, LLC | 0.08% | Add +18.8% | 674,238 | $22.7M |
| Marshall Wace, LLP | 0.02% | Reduce -47.9% | 656,580 | $22.1M |
| Man Group plc | 0.04% | New | 615,438 | $20.7M |
| Westwood Holdings Group Inc. | 0.15% | Add +11.8% | 596,785 | $20.1M |
| Artisan Partners Limited Partnership | 0.03% | Add +6.6% | 537,003 | $18.1M |
| Citadel Advisors | 0.01% | Reduce -46.1% | 528,082 | $17.8M |
| Renaissance Technologies | 0.02% | Add +22.3% | 514,887 | $17.3M |
| Burkehill Global Management, LP | 0.98% | Reduce -16.7% | 500,000 | $16.8M |
| Vanguard Group Inc. | 0.00% | Add +116.9% | 468,461 | $15.7M |
| BNP Paribas Financial Markets | 0.01% | Add +16.8% | 465,410 | $15.6M |
| Wellington Management Group LLP | 0.00% | Add +617.9% | 458,073 | $15.4M |
| Goldman Sachs Group Inc. | 0.00% | Add +7.2% | 424,766 | $14.3M |
| Praetorian PR LLC | 8.22% | New | 400,000 | $13.4M |
| Bank of America Corp. | 0.00% | Reduce -7.5% | 390,031 | $13.1M |
| William Blair Investment Management, LLC | 0.03% | Reduce -54.6% | 368,449 | $12.4M |
| Nuveen, LLC | 0.00% | Add +80.1% | 365,753 | $12.3M |
| Alyeska Investment Group, L.P. | 0.04% | Add +12.9% | 352,375 | $11.8M |
| Sei Investments Co. | 0.01% | Add +18.3% | 349,875 | $11.8M |
| Glenmede Investment Management, LP | 0.06% | Add +1490.7% | 345,739 | $11.6M |
| Cubist Systematic Strategies, LLC | 0.16% | Add +1.7% | 342,574 | $11.5M |
| Millennium Management | 0.01% | Reduce -67.2% | 335,606 | $11.3M |
| UBS Group AG | 0.00% | Add +66.3% | 334,000 | $11.2M |
| Engle Capital Management, L.P. | 3.91% | Reduce -18.6% | 330,119 | $11.1M |
| Manufacturers Life Insurance Company, The | 0.01% | Add +9.9% | 324,500 | $10.9M |
| Bank of New York Mellon Corp | 0.00% | Add +23.8% | 324,242 | $10.9M |
| Northern Trust Corp. | 0.00% | Add +69.1% | 306,928 | $10.3M |
| Algert Global LLC | 0.15% | Add +825.6% | 271,631 | $9.1M |
| Seven Grand Managers, LLC | 0.68% | Reduce -44.0% | 250,000 | $8.4M |
| Russell Investments Group, Ltd. | 0.01% | Add +7.7% | 234,111 | $7.9M |
| Lord, Abbett & Co. LLC | 0.02% | Reduce -20.1% | 222,041 | $7.5M |
| Renaissance Group LLC | 0.27% | Add +8.0% | 211,021 | $7.1M |
| Globeflex Capital L P | 1.09% | New | 209,667 | $7.0M |
| Squarepoint Ops LLC | 0.01% | Add +2468.4% | 202,851 | $6.8M |
| Charles Schwab Investment Management Inc. | 0.00% | Add +99.3% | 159,870 | $5.4M |
| Tudor Investment Corporation | 0.03% | Reduce -65.7% | 148,096 | $5.0M |
| State of Wisconsin Investment Board | 0.01% | No change | 147,858 | $5.0M |
| Cantor Fitzgerald, L. P. | 0.09% | Add +93.1% | 140,000 | $4.7M |
| Robeco Institutional Asset Management B.V. | 0.01% | Add +33.4% | 127,728 | $4.3M |
| Creative Planning | 0.00% | New | 120,661 | $4.1M |
| Moody Aldrich Partners LLC | 0.72% | Reduce -35.5% | 112,300 | $3.8M |
| Jump Financial, LLC | 0.05% | Reduce -55.0% | 110,400 | $3.7M |
| Trexquant Investment LP | 0.04% | New | 102,602 | $3.4M |
| Engineers Gate Manager LP | 0.04% | Reduce -39.6% | 99,539 | $3.3M |
| Walleye Capital LLC | 0.03% | Add +560.9% | 96,494 | $3.2M |
| Aquatic Capital Management LLC | 0.06% | New | 95,749 | $3.2M |
| FJ Capital Management LLC | 0.34% | Add +52.6% | 95,683 | $3.2M |
| Cinctive Capital Management LP | 0.15% | Add +260.0% | 90,000 | $3.0M |
| New York State Common Retirement Fund | 0.00% | Add +30.8% | 87,657 | $2.9M |
| Point72 Asset Management | 0.01% | Reduce -8.7% | 82,801 | $2.8M |
| Barclays PLC | 0.00% | Reduce -81.0% | 79,992 | $2.7M |
| Jain Global LLC | 0.04% | Reduce -46.3% | 79,000 | $2.7M |
| Moody National Bank Trust Division | 0.21% | Reduce -50.3% | 74,485 | $2.5M |
| Rhumbline Advisers | 0.00% | Add +54.8% | 71,167 | $2.4M |
| Envestnet Asset Management Inc. | 0.00% | Reduce -1.1% | 69,270 | $2.3M |
| Raymond James Financial Inc. | 0.00% | Add +12.6% | 63,396 | $2.1M |
| Legal & General Group Plc | 0.00% | Add +3.6% | 63,201 | $2.1M |
| Y-Intercept (Hong Kong) Ltd | 0.05% | Add +203.0% | 61,355 | $2.1M |
| Marex Group Ltd | 0.03% | New | 61,172 | $2.1M |
| Jane Street Group, LLC | 0.00% | Add +49.3% | 60,721 | $2.0M |
| WINTON GROUP Ltd | 0.07% | Reduce -1.7% | 53,300 | $1.8M |
| North Reef Capital Management LP | 0.08% | New | 52,191 | $1.8M |
| Los Angeles Capital Management LLC | 0.01% | Add +135.7% | 50,322 | $1.7M |
| Franklin Resources Inc. | 0.00% | Add +326.0% | 45,450 | $1.5M |
| Main Street Financial Solutions, LLC | 0.10% | New | 45,000 | $1.5M |
| Dark Forest Capital Management LP | 0.06% | New | 44,888 | $1.5M |
| Federated Hermes, Inc. | 0.00% | New | 44,372 | $1.5M |
| Deutsche Bank AG | 0.00% | Add +105.6% | 41,198 | $1.4M |
| State of Tennessee, Department of Treasury | 0.00% | Reduce -66.2% | 39,520 | $1.3M |
| Teachers Retirement System of the State of Kentucky | 0.01% | New | 39,234 | $1.3M |
| Wells Fargo & Company | 0.00% | Reduce -58.0% | 38,410 | $1.3M |
| Militia Capital Partners, LP | 0.56% | Add +20.0% | 36,000 | $1.2M |
| Schonfeld Strategic Advisors LLC | 0.01% | Reduce -41.9% | 35,665 | $1.2M |
"% of holder's portfolio" is MRX's weight in each manager's 13F, not the share of Marex UK Holdings Ltd. the manager owns.