Marketaxess HoldingsMKTX
13F holders, Q4 2025 (December 31)487holders +35
102new positions
71sold out
8famous investors
$181.23avg. 13F price*
At the end of Q4 2025, 487 institutions reported holding Marketaxess Holdings Inc. (MKTX) in their 13F filings, up 35 from Q3 2025. 102 opened new positions and 71 sold out. The largest holders were Vanguard Group Inc. ($696.0M), BlackRock, Inc. ($679.0M) and Primecap Management Co. ($575.5M). 8 famous investors held it, including Cliff Asness (0.2% of AQR Capital Management's portfolio), Ken Griffin (0.1% of Citadel Advisors's portfolio) and Jim Simons / Peter Brown (0.0% of Renaissance Technologies's portfolio).
- Company
- Marketaxess Holdings Inc.
- CUSIP
- 57060D108
- Latest filing quarter
- Q2 2026
History
Number of 13F holders
Total Exit/New Position Q3 2025 → Q4 2025
| Institutions | Total Value | |
|---|---|---|
| New Positions | 102 | $121.2M |
| Exits | 71 | $135.6M |
All 13F filers, Q3 2025 → Q4 2025: 9,529,764 shares bought and 8,284,761 shares sold, net +1,245,003 shares. Counts holders who added, trimmed, opened or closed a position; split-adjusted.
Ownership 487 holders
| Vanguard Group Inc. | 0.01% | Reduce -0.4% | 3,839,889 | $696.0M |
| BlackRock, Inc. | 0.01% | Add +102.5% | 3,746,472 | $679.0M |
| Primecap Management Co. | 0.44% | Add +42.4% | 3,175,425 | $575.5M |
| AQR Capital Management | 0.24% | Add +169.0% | 2,558,097 | $463.7M |
| FMR LLC | 0.02% | Reduce -6.5% | 2,004,625 | $363.3M |
| North Reef Capital Management LP | 11.74% | Add +76.6% | 1,609,330 | $291.7M |
| State Street Corp. | 0.01% | Reduce -5.5% | 1,248,314 | $226.3M |
| Van Eck Associates Corp. | 0.18% | Reduce -37.6% | 1,214,967 | $220.2M |
| GUARDCAP ASSET MANAGEMENT Ltd | 5.58% | Reduce -15.3% | 1,153,578 | $209.0M |
| Bank of Montreal | 0.07% | Add +5086.4% | 951,024 | $172.4M |
| Geode Capital Management, LLC | 0.01% | Add +0.3% | 833,067 | $151.0M |
| Citadel Advisors | 0.08% | Add +101.6% | 625,208 | $113.3M |
| Neuberger Berman Group LLC | 0.07% | Add +26504.0% | 549,639 | $99.6M |
| JPMorgan Chase & Co. | 0.01% | Add +21.8% | 545,364 | $98.8M |
| Findlay Park Partners LLP | 1.24% | Reduce -16.8% | 536,400 | $97.2M |
| Two Sigma Investments, LP | 0.15% | Add +46.4% | 533,527 | $96.7M |
| Dimensional Fund Advisors LP | 0.02% | Add +1.1% | 526,981 | $95.5M |
| Norges Bank | 0.01% | — | 503,855 | $91.3M |
| Morgan Stanley | 0.00% | Reduce -22.6% | 424,877 | $77.0M |
| BNP Paribas Financial Markets | 0.04% | Reduce -22.7% | 375,735 | $68.1M |
| Charles Schwab Investment Management Inc. | 0.01% | Add +1.0% | 318,386 | $57.7M |
| RDST Capital LLC | 5.31% | Add +10.3% | 310,697 | $56.3M |
| Millennium Management | 0.04% | Reduce -50.4% | 301,665 | $54.7M |
| Bank of New York Mellon Corp | 0.01% | Reduce -20.7% | 298,728 | $54.1M |
| Arrowstreet Capital, Limited Partnership | 0.03% | Add +10.9% | 288,742 | $52.3M |
| Northern Trust Corp. | 0.01% | Reduce -0.1% | 234,306 | $42.5M |
| Holocene Advisors, LP | 0.08% | Reduce -23.4% | 214,855 | $38.9M |
| HRT Financial LP | 0.12% | Add +106.3% | 214,101 | $38.8M |
| Bank of America Corp. | 0.00% | Add +23.2% | 199,231 | $36.1M |
| BNP PARIBAS ASSET MANAGEMENT Holding S.A. | 0.04% | Add +22178.7% | 190,483 | $34.5M |
| Ieq Capital, LLC | 0.10% | Add +479.6% | 189,326 | $34.3M |
| Principal Financial Group Inc. | 0.02% | Reduce -3.7% | 178,073 | $32.3M |
| Renaissance Technologies | 0.05% | Reduce -28.2% | 176,000 | $31.9M |
| Goldman Sachs Group Inc. | 0.00% | Add +29.1% | 172,598 | $31.3M |
| Two Sigma Advisers, LP | 0.06% | Reduce -1.5% | 171,600 | $31.1M |
| Connor, Clark & Lunn Investment Management Ltd. | 0.08% | Add +35.4% | 170,565 | $30.9M |
| Walleye Capital LLC | 0.19% | Add +1003.9% | 168,688 | $30.6M |
| Janus Henderson Group PLC | 0.01% | Add +16.0% | 168,447 | $30.5M |
| Nuveen, LLC | 0.01% | Reduce -0.3% | 134,524 | $24.4M |
| Public Sector Pension Investment Board | 0.08% | Reduce -11.7% | 128,700 | $23.3M |
| T. Rowe Price Investment Management, Inc. | 0.01% | Reduce -91.5% | 116,204 | $21.1M |
| Invesco Ltd. | 0.00% | Add +50.2% | 114,619 | $20.8M |
| Raymond James Financial Inc. | 0.01% | Reduce -35.1% | 113,465 | $20.6M |
| UBS AM, a distinct business unit of UBS ASSET MANAGEMENT AMERICAS LLC | 0.00% | Reduce -3.1% | 108,428 | $19.7M |
| Cooke & Bieler LP | 0.20% | New | 104,100 | $18.9M |
| Champlain Investment Partners, LLC | 0.19% | New | 103,311 | $18.7M |
| UBS Group AG | 0.00% | Reduce -60.8% | 101,955 | $18.5M |
| Schonfeld Strategic Advisors LLC | 0.09% | Reduce -16.6% | 100,235 | $18.2M |
| Legal & General Group Plc | 0.00% | Reduce -3.3% | 97,269 | $17.6M |
| California Public Employees Retirement System | 0.01% | Reduce -16.9% | 97,186 | $17.6M |
| Victory Capital Management Inc. | 0.01% | Add +208.6% | 93,670 | $17.0M |
| Flossbach Von Storch SE | 0.07% | Add +17.9% | 93,100 | $16.9M |
| Rhumbline Advisers | 0.01% | Reduce -2.5% | 88,192 | $16.0M |
| Ameriprise Financial Inc. | 0.00% | Add +0.0% | 83,362 | $15.1M |
| Cerity Partners LLC | 0.02% | Add +181.8% | 81,965 | $14.9M |
| Gillson Capital LP | 0.96% | Add +114.8% | 80,563 | $14.6M |
| Voloridge Investment Management, LLC | 0.05% | Reduce -57.8% | 80,135 | $14.5M |
| Interval Partners, LP | 0.32% | Add +215.9% | 76,423 | $13.9M |
| Goodman Financial Corp | 2.62% | Add +5.4% | 76,294 | $13.8M |
| Cwm, LLC | 0.04% | Add +190.5% | 75,665 | $13.7M |
| Swiss National Bank | 0.01% | Add +1.4% | 73,700 | $13.4M |
| Squarepoint Ops LLC | 0.03% | Reduce -18.7% | 71,658 | $13.0M |
| Assenagon Asset Management S.A. | 0.02% | Add +387.0% | 63,228 | $11.5M |
| Algert Global LLC | 0.17% | Reduce -22.8% | 59,310 | $10.7M |
| Mariner, LLC | 0.01% | Add +381.0% | 59,260 | $10.7M |
| Canada Pension Plan Investment Board | 0.01% | Reduce -58.0% | 50,600 | $9.2M |
| BW Gestao de Investimentos Ltda. | 0.32% | New | 49,500 | $9.0M |
| ICICI Prudential Asset Management Co Ltd | 1.05% | Add +4.7% | 49,289 | $8.9M |
| Wealth Enhancement Advisory Services, LLC | 0.01% | Add +305.3% | 46,537 | $8.4M |
| First Trust Advisors LP | 0.01% | Add +320.0% | 42,955 | $7.8M |
| DF Dent & Co. Inc. | 0.11% | Add +0.3% | 42,116 | $7.6M |
| Quantinno Capital Management LP | 0.01% | Add +272.7% | 41,229 | $7.5M |
| Prana Capital Management, LP | 0.26% | Reduce -34.8% | 39,971 | $7.2M |
| Wilson Asset Management (international) PTY Ltd. | 1.84% | Reduce -21.4% | 39,461 | $7.2M |
| Quadrature Capital Ltd | 0.07% | Add +59.0% | 39,174 | $7.1M |
| Baillie Gifford & Co. | 0.01% | Reduce -76.2% | 39,115 | $7.1M |
| Trexquant Investment LP | 0.06% | Reduce -4.5% | 38,572 | $7.0M |
| WINTON GROUP Ltd | 0.23% | Add +190.6% | 36,364 | $6.6M |
| Teacher Retirement System of Texas | 0.02% | Add +14.5% | 36,140 | $6.6M |
| D. E. Shaw & Co. | 0.01% | Reduce -80.5% | 36,099 | $6.5M |
| State Board of Administration of Florida Retirement System | 0.01% | Reduce -0.8% | 36,041 | $6.5M |
| New York State Teachers Retirement System | 0.01% | Reduce -2.0% | 35,487 | $6.4M |
| California State Teachers Retirement System | 0.01% | Reduce -2.0% | 35,210 | $6.4M |
| Bahl & Gaynor LLC | 0.03% | Reduce -3.9% | 35,046 | $6.4M |
| CANADA LIFE ASSURANCE Co | 0.01% | Reduce -8.5% | 35,041 | $6.4M |
| Prudential Financial Inc. | 0.01% | Reduce -70.2% | 34,363 | $6.2M |
| T. Rowe Price Associates Inc. | 0.00% | Add +7.5% | 33,975 | $6.2M |
| Susquehanna International Group, LLP | 0.01% | Reduce -65.7% | 33,473 | $6.1M |
| State of Wisconsin Investment Board | 0.01% | Reduce -3.8% | 33,390 | $6.1M |
| Stifel Financial Corp. | 0.01% | Add +30.1% | 33,224 | $6.0M |
| Balyasny Asset Management L.P. | 0.01% | New | 32,695 | $5.9M |
| Picton Mahoney Asset Management | 0.06% | New | 32,396 | $5.9M |
| Thrivent Financial for Lutherans | 0.01% | Reduce -0.2% | 31,873 | $5.8M |
| Citigroup Inc. | 0.00% | Reduce -40.6% | 31,396 | $5.7M |
| Healthcare of Ontario Pension Plan Trust Fund | 0.01% | Reduce -64.0% | 30,694 | $5.6M |
| GW&K Investment Management, LLC | 0.05% | Reduce -0.1% | 30,579 | $5.5M |
| Van Den Berg Management I, Inc. | 1.26% | Add +116.9% | 30,399 | $5.5M |
| Royal Bank of Canada | 0.00% | Reduce -80.3% | 30,307 | $5.5M |
| Mercer Global Advisors Inc. | 0.01% | Add +227.7% | 29,599 | $5.4M |
| Man Group plc | 0.01% | Reduce -66.3% | 29,373 | $5.3M |
"% of holder's portfolio" is MKTX's weight in each manager's 13F, not the share of Marketaxess Holdings Inc. the manager owns.