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 |
| MetLife Investment Management, LLC | 0.01% | Add +64.4% | 31,582 | $1.1M |
| PDT Partners, LLC | 0.06% | Reduce -61.5% | 29,398 | $988K |
| Mackenzie Financial Corp. | 0.00% | Add +166.7% | 28,886 | $971K |
| Credit Agricole S A | 0.00% | — | 26,626 | $895K |
| PEAK6 LLC | 0.02% | New | 26,354 | $886K |
| Quantbot Technologies LP | 0.02% | Reduce -81.0% | 26,014 | $875K |
| STRS Ohio | 0.00% | Add +40.9% | 25,500 | $857K |
| MIRAE ASSET GLOBAL ETFS HOLDINGS Ltd. | 0.00% | Add +43.3% | 25,013 | $841K |
| Picton Mahoney Asset Management | 0.01% | New | 22,845 | $768K |
| Mariner, LLC | 0.00% | New | 22,616 | $760K |
| Twinbeech Capital LP | 0.03% | Reduce -82.5% | 21,483 | $722K |
| Daiwa Securities Group Inc. | 0.00% | New | 21,271 | $715K |
| Numerai GP LLC | 0.09% | Reduce -54.1% | 18,760 | $631K |
| Verition Fund Management LLC | 0.00% | Reduce -33.8% | 17,100 | $575K |
| Riverwater Partners LLC | 0.23% | Reduce -23.4% | 16,627 | $559K |
| Entropy Technologies, LP | 0.04% | Reduce -8.0% | 16,471 | $554K |
| Corsair Capital Management, L.P. | 0.09% | No change | 14,932 | $502K |
| Intech Investment Management LLC | 0.00% | Reduce -1.9% | 14,844 | $499K |
| Counterpoint Mutual Funds LLC | 0.04% | New | 14,760 | $496K |
| Police & Firemen's Retirement System of New Jersey | 0.00% | Add +98.5% | 14,617 | $491K |
| Fred Alger Management, LLC | 0.00% | New | 12,400 | $417K |
| R Squared Ltd | 0.16% | New | 10,839 | $364K |
| Cibc World Market Inc. | 0.00% | New | 10,531 | $354K |
| Choreo, LLC | 0.00% | New | 10,468 | $352K |
| Capstone Investment Advisors, LLC | 0.00% | New | 10,450 | $351K |
| Janney Capital Management LLC | 0.02% | Reduce -2.5% | 9,882 | $332K |
| Clear Harbor Asset Management, LLC | 0.02% | Add +7.2% | 9,627 | $324K |
| Orion Porfolio Solutions, LLC | 0.00% | Add +18.9% | 9,305 | $313K |
| PharVision Advisers, LLC | 0.17% | Add +42.9% | 9,225 | $310K |
| ProShare Advisors LLC | 0.00% | Add +41.0% | 9,208 | $310K |
| AQR Capital Management | 0.00% | New | 8,408 | $283K |
| Voya Investment Management LLC | 0.00% | Reduce -3.9% | 8,355 | $281K |
| Keybank National Association | 0.00% | Reduce -9.3% | 7,860 | $264K |
| Navellier & Associates Inc. | 0.03% | New | 7,655 | $257K |
| Verdence Capital Advisors LLC | 0.01% | Add +3.2% | 7,841 | $242K |
| Sumitomo Mitsui Trust Group, Inc. | 0.00% | New | 7,183 | $241K |
| SG Americas Securities, LLC | 0.00% | Reduce -69.0% | 6,927 | $233K |
| Dynamic Technology Lab Private Ltd | 0.04% | Reduce -78.4% | 6,858 | $231K |
| Graham Capital Management, L.P. | 0.01% | Reduce -85.8% | 6,501 | $219K |
| US Bancorp \de | 0.00% | Reduce -76.4% | 4,746 | $160K |
| Ameritas Investment Partners, Inc. | 0.00% | Add +38.4% | 4,498 | $151K |
| Citigroup Inc. | 0.00% | Reduce -69.8% | 3,803 | $128K |
| California State Teachers Retirement System | 0.00% | Add +71.2% | 3,401 | $114K |
| Bessemer Group Inc. | 0.00% | Add +635.9% | 3,260 | $109K |
| Gen-Wealth Partners Inc | 0.03% | No change | 2,575 | $87K |
| Steward Partners Investment Advisory, LLC | 0.00% | Reduce -17.7% | 2,325 | $78K |
| Aster Capital Management (DIFC) Ltd | 0.04% | New | 2,208 | $74K |
| Assetmark, Inc. | 0.00% | Reduce -0.8% | 1,727 | $58K |
| Tower Research Capital LLC (TRC) | 0.00% | Reduce -46.0% | 1,527 | $51K |
| Quarry LP | 0.01% | Reduce -28.5% | 1,524 | $51K |
| Farther Finance Advisors, LLC | 0.00% | New | 1,320 | $44K |
| Rockefeller Capital Management L.P. | 0.00% | New | 1,280 | $43K |
| Sterling Capital Management LLC | 0.00% | Add +288.5% | 1,255 | $42K |
| Cwm, LLC | 0.00% | New | 1,226 | $41K |
| Amalgamated Bank | 0.00% | No change | 1,088 | $37K |
| Osaic Holdings, Inc. | 0.00% | Reduce -30.1% | 964 | $33K |
| Caitong International Asset Management Co., Ltd | 0.02% | Add +1418.2% | 668 | $22K |
| Jones Financial Companies LLLP | 0.00% | Add +55.6% | 560 | $19K |
| Park Place Capital Corp | 0.00% | Add +35.5% | 370 | $12K |
| Harbor Capital Advisors, Inc. | 0.00% | New | 371 | $12K |
| Stone House Investment Management, LLC | 0.00% | New | 311 | $10K |
| Nisa Investment Advisors, LLC | 0.00% | No change | 280 | $9K |
| SBI Securities Co., Ltd. | 0.00% | Reduce -82.0% | 262 | $9K |
| Proffitt & Goodson Inc. | 0.00% | New | 250 | $8K |
| Quadrant Capital Group LLC | 0.00% | New | 215 | $7K |
| Annis Gardner Whiting Capital Advisors, LLC | 0.00% | Reduce -25.5% | 149 | $5K |
| Bell Investment Advisors, Inc | 0.00% | No change | 117 | $4K |
| GPS Wealth Strategies Group, LLC | 0.00% | No change | 100 | $3K |
| Ameritas Advisory Services, LLC | 0.00% | New | 100 | $3K |
| Northwestern Mutual Wealth Management Co. | 0.00% | Reduce -21.8% | 97 | $3K |
| Arax Advisory Partners | 0.00% | New | 95 | $3K |
| GAMMA Investing LLC | 0.00% | New | 91 | $3K |
| Allworth Financial LP | 0.00% | New | 88 | $3K |
| Larson Financial Group LLC | 0.00% | Add +182.8% | 82 | $3K |
| WealthCollab, LLC | 0.00% | No change | 75 | $3K |
| Federation des caisses Desjardins du Quebec | 0.00% | New | 60 | $2K |
| Harbour Investments, Inc. | 0.00% | Reduce -99.7% | 50 | $2K |
| PNC Financial Services Group, Inc. | 0.00% | Add +44.1% | 49 | $2K |
| True Wealth Design, LLC | 0.00% | New | 35 | $1K |
| Montag A & Associates Inc. | 0.00% | New | 27 | $908 |
| CIBC Private Wealth Group LLC | 0.00% | Reduce -42.5% | 23 | $773 |
| Essential Partners LLC | 0.00% | New | 19 | $639 |
| UMB Bank, n.a. | 0.00% | New | 18 | $605 |
| Principal Securities, Inc. | 0.00% | Reduce -22.7% | 17 | $572 |
| Physician Wealth Advisors, Inc. | 0.00% | No change | 14 | $471 |
| Bogart Wealth, LLC | 0.00% | No change | 12 | $403 |
| Advisory Services Network, LLC | 0.00% | New | 7 | $235 |
| Kilter Group LLC | 0.00% | Reduce -14.3% | 6 | $202 |
| Signaturefd, LLC | 0.00% | Reduce -92.0% | 6 | $202 |
| IFP Advisors, Inc | 0.00% | New | 2 | $67 |
| EverSource Wealth Advisors, LLC | 0.00% | New | 2 | $67 |
"% of holder's portfolio" is MRX's weight in each manager's 13F, not the share of Marex UK Holdings Ltd. the manager owns.