Marketaxess HoldingsMKTX
13F holders, Q1 2026 (March 31)452holders −35
54new positions
87sold out
8famous investors
$165.00avg. 13F price*
At the end of Q1 2026, 452 institutions reported holding Marketaxess Holdings Inc. (MKTX) in their 13F filings, down 35 from Q4 2025. 54 opened new positions and 87 sold out. The largest holders were BlackRock, Inc. ($672.3M), Primecap Management Co. ($552.2M) and AQR Capital Management ($442.8M). 8 famous investors held it, including Cliff Asness (0.2% of AQR Capital Management's portfolio), Israel Englander (0.1% of Millennium Management's portfolio) and Steve Cohen (0.1% of Point72 Asset Management's portfolio).
- Company
- Marketaxess Holdings Inc.
- CUSIP
- 57060D108
- Latest filing quarter
- Q2 2026
History
Number of 13F holders
Total Exit/New Position Q4 2025 → Q1 2026
| Institutions | Total Value | |
|---|---|---|
| New Positions | 54 | $150.9M |
| Exits | 87 | $108.8M |
All 13F filers, Q4 2025 → Q1 2026: 5,579,033 shares bought and 3,379,018 shares sold, net +2,200,015 shares. Counts holders who added, trimmed, opened or closed a position; split-adjusted.
Ownership 452 holders
| BlackRock, Inc. | 0.01% | Add +8.8% | 4,075,154 | $672.3M |
| Primecap Management Co. | 0.43% | Add +5.4% | 3,347,125 | $552.2M |
| AQR Capital Management | 0.20% | Add +4.9% | 2,683,745 | $442.8M |
| Vanguard Portfolio Management LLC | 0.02% | — | 2,163,671 | $357.0M |
| North Reef Capital Management LP | 10.65% | Add +16.5% | 1,875,000 | $309.3M |
| Vanguard Capital Management LLC | 0.01% | — | 1,609,259 | $265.5M |
| FMR LLC | 0.01% | Reduce -24.2% | 1,519,421 | $250.7M |
| State Street Corp. | 0.01% | Add +2.6% | 1,280,857 | $211.3M |
| Van Eck Associates Corp. | 0.15% | Add +2.0% | 1,239,285 | $204.5M |
| Millennium Management | 0.14% | Add +260.4% | 1,087,188 | $179.4M |
| Bank of Montreal | 0.07% | Add +7.3% | 1,020,559 | $168.4M |
| Neuberger Berman Group LLC | 0.12% | Add +75.8% | 966,029 | $159.4M |
| Geode Capital Management, LLC | 0.01% | Add +3.6% | 862,987 | $142.4M |
| GUARDCAP ASSET MANAGEMENT Ltd | 6.09% | Reduce -44.2% | 643,370 | $106.4M |
| Dimensional Fund Advisors LP | 0.02% | Add +10.3% | 581,484 | $95.9M |
| Two Sigma Investments, LP | 0.07% | Reduce -1.8% | 524,024 | $86.5M |
| Goldman Sachs Group Inc. | 0.01% | Add +194.9% | 509,043 | $84.0M |
| Morgan Stanley | 0.00% | Add +15.4% | 490,537 | $80.9M |
| Findlay Park Partners LLP | 1.11% | Reduce -10.4% | 480,600 | $79.3M |
| JPMorgan Chase & Co. | 0.00% | Reduce -20.6% | 432,826 | $71.3M |
| Charles Schwab Investment Management Inc. | 0.01% | Add +6.3% | 338,507 | $55.8M |
| Walleye Capital LLC | 0.37% | Add +97.2% | 332,723 | $54.9M |
| BNP Paribas Financial Markets | 0.04% | Reduce -15.0% | 319,302 | $52.7M |
| Arrowstreet Capital, Limited Partnership | 0.03% | Add +2.3% | 295,470 | $48.7M |
| RDST Capital LLC | 4.69% | Reduce -5.0% | 295,267 | $48.7M |
| Bank of New York Mellon Corp | 0.01% | Reduce -2.9% | 289,940 | $47.8M |
| UBS Group AG | 0.01% | Add +167.0% | 272,238 | $44.9M |
| Bank of America Corp. | 0.00% | Add +32.4% | 263,858 | $43.5M |
| Amundi | 0.01% | Add +803.9% | 258,708 | $42.7M |
| Point72 Asset Management | 0.08% | New | 252,825 | $41.7M |
| Driehaus Capital Management LLC | 0.29% | New | 239,256 | $39.5M |
| Northern Trust Corp. | 0.01% | Add +0.9% | 236,350 | $39.0M |
| Vanguard Fiduciary Trust Co. | 0.01% | — | 229,427 | $37.9M |
| Cooke & Bieler LP | 0.42% | Add +117.3% | 226,220 | $37.3M |
| Champlain Investment Partners, LLC | 0.44% | Add +103.3% | 210,076 | $34.7M |
| Victory Capital Management Inc. | 0.02% | Add +118.8% | 204,932 | $33.8M |
| BNP PARIBAS ASSET MANAGEMENT Holding S.A. | 0.04% | Add +6.8% | 203,425 | $33.6M |
| Public Sector Pension Investment Board | 0.10% | Add +49.4% | 192,230 | $31.7M |
| Principal Financial Group Inc. | 0.02% | Add +2.1% | 181,798 | $30.0M |
| Connor, Clark & Lunn Investment Management Ltd. | 0.07% | Add +2.0% | 174,059 | $28.7M |
| Ieq Capital, LLC | 0.13% | Reduce -8.2% | 173,891 | $28.7M |
| Janus Henderson Group PLC | 0.01% | Add +0.2% | 168,797 | $27.8M |
| Renaissance Technologies | 0.04% | Reduce -5.1% | 167,100 | $27.6M |
| Sone Capital Management, LLC | 2.22% | Add +1444.8% | 159,966 | $26.4M |
| Nuveen, LLC | 0.01% | Add +10.1% | 148,081 | $24.4M |
| Healthcare of Ontario Pension Plan Trust Fund | 0.04% | Add +374.4% | 145,628 | $24.0M |
| HRT Financial LP | 0.06% | Reduce -36.0% | 136,952 | $22.6M |
| Raymond James Financial Inc. | 0.01% | Add +7.2% | 121,635 | $20.1M |
| Invesco Ltd. | 0.00% | Add +3.2% | 118,332 | $19.5M |
| Eubel Brady & Suttman Asset Management Inc. | 2.33% | New | 111,483 | $18.4M |
| Davis Asset Management, L.P. | 0.52% | New | 108,846 | $18.0M |
| Flossbach Von Storch SE | 0.08% | Add +16.1% | 108,100 | $17.8M |
| UBS AM, a distinct business unit of UBS ASSET MANAGEMENT AMERICAS LLC | 0.00% | Reduce -1.2% | 107,110 | $17.7M |
| Assenagon Asset Management S.A. | 0.03% | Add +65.8% | 104,801 | $17.3M |
| Polar Asset Management Partners Inc. | 0.56% | Add +523.8% | 104,174 | $17.2M |
| Legal & General Group Plc | 0.00% | Reduce -6.7% | 90,720 | $15.0M |
| Rhumbline Advisers | 0.01% | Add +2.0% | 89,961 | $14.8M |
| Cerity Partners LLC | 0.02% | Add +2.5% | 84,001 | $13.9M |
| Goodman Financial Corp | 2.36% | Add +9.0% | 83,163 | $13.7M |
| Citadel Advisors | 0.01% | Reduce -86.9% | 82,159 | $13.6M |
| Mariner, LLC | 0.02% | Add +33.5% | 79,144 | $13.1M |
| Cwm, LLC | 0.03% | Reduce -2.2% | 73,978 | $12.2M |
| Swiss National Bank | 0.01% | No change | 73,700 | $12.2M |
| California Public Employees Retirement System | 0.01% | Reduce -25.4% | 72,522 | $12.0M |
| Trexquant Investment LP | 0.08% | Add +82.5% | 70,378 | $11.6M |
| Ameriprise Financial Inc. | 0.00% | Reduce -16.2% | 69,885 | $11.5M |
| Gotham Asset Management | 0.03% | Add +109.6% | 60,213 | $9.9M |
| Heartland Advisors Inc. | 0.49% | Add +105.3% | 58,334 | $9.6M |
| Wealth Enhancement Advisory Services, LLC | 0.02% | Add +20.7% | 56,172 | $8.9M |
| ICICI Prudential Asset Management Co Ltd | 0.98% | No change | 49,289 | $8.1M |
| Quantinno Capital Management LP | 0.01% | Add +14.0% | 46,990 | $7.8M |
| Alliancebernstein L.P. | 0.00% | Add +100.8% | 41,259 | $7.5M |
| T. Rowe Price Investment Management, Inc. | 0.01% | Reduce -61.9% | 44,278 | $7.3M |
| Holocene Advisors, LP | 0.02% | Reduce -79.6% | 43,799 | $7.2M |
| California State Teachers Retirement System | 0.01% | Add +24.1% | 43,688 | $7.2M |
| Schonfeld Strategic Advisors LLC | 0.06% | Reduce -57.5% | 42,596 | $7.0M |
| DF Dent & Co. Inc. | 0.13% | Reduce -2.6% | 41,000 | $6.8M |
| First Trust Advisors LP | 0.00% | Reduce -8.1% | 39,492 | $6.5M |
| Wilson Asset Management (international) PTY Ltd. | 1.84% | No change | 39,461 | $6.5M |
| Fideuram - Intesa Sanpaolo Private Banking S.P.A. | 0.23% | Add +34.3% | 39,370 | $6.5M |
| Caisse de depot et placement du Quebec | 0.01% | Add +73.0% | 38,887 | $6.4M |
| Deutsche Bank AG | 0.00% | Add +554.8% | 37,476 | $6.2M |
| T. Rowe Price Associates Inc. | 0.00% | Add +8.7% | 36,920 | $6.1M |
| Stifel Financial Corp. | 0.01% | Add +7.4% | 35,697 | $5.9M |
| State of Wisconsin Investment Board | 0.01% | Add +6.2% | 35,472 | $5.9M |
| State Board of Administration of Florida Retirement System | 0.01% | Reduce -2.8% | 35,037 | $5.8M |
| CANADA LIFE ASSURANCE Co | 0.01% | Reduce -3.2% | 33,909 | $5.6M |
| Prudential Financial Inc. | 0.01% | Reduce -1.8% | 33,744 | $5.6M |
| VANGUARD ASSET MANAGEMENT, Ltd | 0.00% | — | 33,466 | $5.5M |
| GW&K Investment Management, LLC | 0.05% | Add +6.9% | 32,697 | $5.4M |
| Bahl & Gaynor LLC | 0.03% | Reduce -6.9% | 32,626 | $5.4M |
| Mercer Global Advisors Inc. | 0.01% | Add +8.0% | 31,957 | $5.3M |
| Prana Capital Management, LP | 0.16% | Reduce -21.0% | 31,593 | $5.2M |
| New York State Teachers Retirement System | 0.01% | Reduce -11.0% | 31,584 | $5.2M |
| Van Den Berg Management I, Inc. | 1.19% | Add +3.4% | 31,423 | $5.2M |
| Thrivent Financial for Lutherans | 0.01% | Reduce -2.3% | 31,141 | $5.1M |
| Royal Bank of Canada | 0.00% | Add +2.0% | 30,923 | $5.1M |
| Sei Investments Co. | 0.00% | Add +113.1% | 30,231 | $5.0M |
| Baillie Gifford & Co. | 0.00% | Reduce -25.8% | 29,032 | $4.8M |
| Alps Advisors Inc. | 0.02% | New | 28,895 | $4.8M |
"% of holder's portfolio" is MKTX's weight in each manager's 13F, not the share of Marketaxess Holdings Inc. the manager owns.