Marketaxess Holdings Inc
MKTX- Exchange
- Nasdaq
- Industry
- Security Brokers, Dealers & Flotation Companies
- SEC CIK
- 0001278021
In the last 90 days, Marketaxess Holdings Inc insiders filed 0 open-market purchases and 4 sales; 397 institutions reported holding it in 13F filings for Q2 2026, worth $4.44B in total; no superinvestor holds it.
13F holders, Q1 2026
Institutional positions in Marketaxess Holdings Inc as of Mar 31, 2026. Investment managers with $100 million or more in US stocks report their long positions on Form 13F within 45 days after each quarter ends. How 13F works
- Institutional holders
- 452
- −27 vs. Q4 2025
- Shares held
- 38.2M
- +6.09M (+18.9%) vs. Q4 2025
- Total value
- $6.31B
- +$482.8M (+8.3%) vs. Q4 2025
- New holders
- 63
- 182 more added
- Sold out
- 90
- 150 more reduced
8 institutions that held it in Q4 2025 haven't filed for Q1 2026 yet. Not filing isn't selling, so they aren't counted as sold out or in the changes above.
Compare with Q4 2025: new holders, sold out and not filed yet
Holders and value by quarter
Institutions reporting MKTX on Form 13F each quarter since Q1 2021, and the total value they reported. Values are as of each quarter end, so they also move with the share price.
| Quarter | Holders | Value |
|---|---|---|
| Q2 2026 | 397 | $4.44B |
| Q1 2026 | 452 | $6.31B |
| Q4 2025 | 487 | $6.62B |
| Q3 2025 | 452 | $6.21B |
| Q2 2025 | 531 | $8.24B |
| Q1 2025 | 511 | $8.05B |
| Q4 2024 | 519 | $8.51B |
| Q3 2024 | 511 | $9.42B |
| Q2 2024 | 468 | $7.48B |
| Q1 2024 | 463 | $8.14B |
| Q4 2023 | 506 | $10.9B |
| Q3 2023 | 485 | $7.98B |
| Q2 2023 | 514 | $9.88B |
| Q1 2023 | 540 | $14.5B |
| Q4 2022 | 500 | $10.3B |
| Q3 2022 | 479 | $8.19B |
| Q2 2022 | 505 | $9.28B |
| Q1 2022 | 506 | $12.4B |
| Q4 2021 | 505 | $15.0B |
| Q3 2021 | 508 | $15.3B |
| Q2 2021 | 551 | $16.8B |
| Q1 2021 | 589 | $17.7B |
Institutions, Q1 2026
Shares, value and share of portfolio for each institution holding Marketaxess Holdings Inc; share changes are against Q4 2025.
| Institution | Shares | Value | % of portfolio | Change in shares | Action |
|---|---|---|---|---|---|
| BlackRock, Inc. | 4,075,154 | $672.3M | 0.01% | +328,682+8.8% | Added |
| Primecap Management Co | 3,347,125 | $552.2M | 0.43% | +171,700+5.4% | Added |
| AQR Capital Management LLC | 2,683,745 | $442.8M | 0.20% | +125,648+4.9% | Added |
| Vanguard Portfolio Management LLC | 2,163,671 | $357.0M | 0.02% | +2,163,671 | New |
| North Reef Capital Management LP | 1,875,000 | $309.3M | 10.65% | +265,670+16.5% | Added |
| Vanguard Capital Management LLC | 1,609,259 | $265.5M | 0.01% | +1,609,259 | New |
| FMR LLC | 1,519,421 | $250.7M | 0.01% | −485,204−24.2% | Reduced |
| State Street Corp | 1,280,857 | $211.3M | 0.01% | +32,543+2.6% | Added |
| Van Eck Associates Corp | 1,239,285 | $204.5M | 0.15% | +24,318+2.0% | Added |
| Millennium Management LLC | 1,087,188 | $179.4M | 0.13% | +785,523+260.4% | Added |
| Bank of Montreal | 1,020,559 | $168.4M | 0.07% | +69,535+7.3% | Added |
| Neuberger Berman Group LLC | 966,029 | $159.4M | 0.12% | +416,390+75.8% | Added |
| Geode Capital Management, LLC | 862,987 | $142.4M | 0.01% | +29,920+3.6% | Added |
| Guardcap Asset Management Ltd | 643,370 | $106.4M | 6.09% | −510,208−44.2% | Reduced |
| Dimensional Fund Advisors LP | 581,484 | $95.9M | 0.02% | +54,503+10.3% | Added |
| Two Sigma Investments, LP | 524,024 | $86.5M | 0.07% | −9,503−1.8% | Reduced |
| Goldman Sachs Group Inc | 509,043 | $84.0M | 0.01% | +336,445+194.9% | Added |
| Morgan Stanley | 490,537 | $80.9M | 0.00% | +65,660+15.5% | Added |
| Findlay Park Partners LLP | 480,600 | $79.3M | 1.11% | −55,800−10.4% | Reduced |
| JPMorgan Chase & Co | 432,826 | $71.3M | 0.00% | −112,538−20.6% | Reduced |
| Charles Schwab Investment Management Inc | 338,507 | $55.8M | 0.01% | +20,121+6.3% | Added |
| Walleye Capital LLC | 332,723 | $54.9M | 0.34% | +164,035+97.2% | Added |
| BNP Paribas Arbitrage, SA | 319,302 | $52.7M | 0.03% | −56,433−15.0% | Reduced |
| Arrowstreet Capital, Limited Partnership | 295,470 | $48.7M | 0.03% | +6,728+2.3% | Added |
| RDST Capital LLC | 295,267 | $48.7M | 4.69% | −15,430−5.0% | Reduced |
| Bank of New York Mellon Corp | 289,940 | $47.8M | 0.01% | −8,788−2.9% | Reduced |
| UBS Group AG | 272,238 | $44.9M | 0.01% | +170,283+167.0% | Added |
| Bank of America Corp | 263,858 | $43.5M | 0.00% | +64,627+32.4% | Added |
| Amundi | 258,708 | $42.7M | 0.01% | +230,087+803.9% | Added |
| Point72 Asset Management, L.P. | 252,825 | $41.7M | 0.07% | +252,825 | New |
| Driehaus Capital Management LLC | 239,256 | $39.5M | 0.29% | +239,256 | New |
| Northern Trust Corp | 236,350 | $39.0M | 0.01% | +2,044+0.9% | Added |
| Vanguard Fiduciary Trust Co | 229,427 | $37.9M | 0.01% | +229,427 | New |
| Cooke & Bieler LP | 226,220 | $37.3M | 0.42% | +122,120+117.3% | Added |
| Champlain Investment Partners, LLC | 210,076 | $34.7M | 0.44% | +106,765+103.3% | Added |
| Victory Capital Management Inc | 204,932 | $33.8M | 0.02% | +111,262+118.8% | Added |
| BNP PARIBAS ASSET MANAGEMENT Holding S.A. | 203,425 | $33.6M | 0.04% | +12,942+6.8% | Added |
| Public Sector Pension Investment Board | 192,230 | $31.7M | 0.10% | +63,530+49.4% | Added |
| Principal Financial Group Inc | 181,798 | $30.0M | 0.02% | +3,725+2.1% | Added |
| Connor, Clark & Lunn Investment Management Ltd. | 174,059 | $28.7M | 0.07% | +3,494+2.0% | Added |
| Ieq Capital, LLC | 173,891 | $28.7M | 0.13% | −15,435−8.2% | Reduced |
| Janus Henderson Group PLC | 168,797 | $27.8M | 0.01% | +350+0.2% | Added |
| Renaissance Technologies LLC | 167,100 | $27.6M | 0.04% | −8,900−5.1% | Reduced |
| Sone Capital Management, LLC | 159,966 | $26.4M | 2.22% | +149,611+1,444.8% | Added |
| Nuveen, LLC | 148,081 | $24.4M | 0.01% | +13,557+10.1% | Added |
| Healthcare of Ontario Pension Plan Trust Fund | 145,628 | $24.0M | 0.04% | +114,934+374.5% | Added |
| HRT Financial LP | 136,952 | $22.6M | 0.06% | −77,149−36.0% | Reduced |
| Raymond James Financial Inc | 121,635 | $20.1M | 0.01% | +8,170+7.2% | Added |
| Invesco Ltd. | 118,332 | $19.5M | 0.00% | +3,713+3.2% | Added |
| Eubel Brady & Suttman Asset Management Inc | 111,483 | $18.4M | 2.18% | +111,483 | New |
| Davis Asset Management, L.P. | 108,846 | $18.0M | 0.52% | +108,846 | New |
| Flossbach Von Storch AG | 108,100 | $17.8M | 0.08% | +15,000+16.1% | Added |
| UBS Asset Management Americas Inc | 107,110 | $17.7M | 0.00% | −1,318−1.2% | Reduced |
| Assenagon Asset Management S.A. | 104,801 | $17.3M | 0.03% | +41,573+65.8% | Added |
| Polar Asset Management Partners Inc. | 104,174 | $17.2M | 0.41% | +87,474+523.8% | Added |
| Legal & General Group Plc | 90,720 | $15.0M | 0.00% | −6,549−6.7% | Reduced |
| Rhumbline Advisers | 89,961 | $14.8M | 0.01% | +1,769+2.0% | Added |
| Cerity Partners LLC | 84,001 | $13.9M | 0.02% | +2,036+2.5% | Added |
| Goodman Financial Corp | 83,163 | $13.7M | 2.36% | +6,869+9.0% | Added |
| Citadel Advisors LLC | 82,159 | $13.6M | 0.01% | −543,049−86.9% | Reduced |
| Mariner, LLC | 79,144 | $13.1M | 0.02% | +19,884+33.6% | Added |
| CWM, LLC | 73,978 | $12.2M | 0.03% | −1,687−2.2% | Reduced |
| Swiss National Bank | 73,700 | $12.2M | 0.01% | 00.0% | Unchanged |
| California Public Employees Retirement System | 72,522 | $12.0M | 0.01% | −24,664−25.4% | Reduced |
| Trexquant Investment LP | 70,378 | $11.6M | 0.08% | +31,806+82.5% | Added |
| Ameriprise Financial Inc | 69,885 | $11.5M | 0.00% | −13,477−16.2% | Reduced |
| Gotham Asset Management, LLC | 60,213 | $9.93M | 0.03% | +31,491+109.6% | Added |
| Heartland Advisors Inc | 58,334 | $9.62M | 0.49% | +29,913+105.2% | Added |
| Wealth Enhancement Advisory Services, LLC | 56,172 | $8.87M | 0.02% | +9,635+20.7% | Added |
| ICICI Prudential Asset Management Co Ltd | 49,289 | $8.13M | 0.98% | 00.0% | Unchanged |
| Quantinno Capital Management LP | 46,990 | $7.75M | 0.01% | +5,761+14.0% | Added |
| Alliancebernstein L.P. | 41,259 | $7.48M | 0.00% | +20,710+100.8% | Added |
| T. Rowe Price Investment Management, Inc. | 44,278 | $7.30M | 0.01% | −71,926−61.9% | Reduced |
| Holocene Advisors, LP | 43,799 | $7.23M | 0.02% | −171,056−79.6% | Reduced |
| California State Teachers Retirement System | 43,688 | $7.21M | 0.01% | +8,478+24.1% | Added |
| Schonfeld Strategic Advisors LLC | 42,596 | $7.03M | 0.06% | −57,639−57.5% | Reduced |
| DF Dent & Co Inc | 41,000 | $6.76M | 0.13% | −1,116−2.6% | Reduced |
| First Trust Advisors LP | 39,492 | $6.52M | 0.00% | −3,463−8.1% | Reduced |
| Wilson Asset Management (International) Pty Ltd | 39,461 | $6.51M | 1.84% | 00.0% | Unchanged |
| Fideuram - Intesa Sanpaolo Private Banking S.P.A. | 39,370 | $6.50M | 0.23% | +10,063+34.3% | Added |
| Caisse de Depot Et Placement du Quebec | 38,887 | $6.42M | 0.01% | +16,403+73.0% | Added |
| Deutsche Bank AG | 37,476 | $6.18M | 0.00% | +31,753+554.8% | Added |
| Price T Rowe Associates Inc | 36,920 | $6.09M | 0.00% | +2,945+8.7% | Added |
| Stifel Financial Corp | 35,697 | $5.89M | 0.01% | +2,473+7.4% | Added |
| State of Wisconsin Investment Board | 35,472 | $5.85M | 0.01% | +2,082+6.2% | Added |
| State Board of Administration of Florida Retirement System | 35,037 | $5.78M | 0.01% | −1,004−2.8% | Reduced |
| Great West Life Assurance Co | 33,909 | $5.60M | 0.01% | −1,132−3.2% | Reduced |
| Prudential Financial Inc | 33,744 | $5.57M | 0.01% | −619−1.8% | Reduced |
| Vanguard Asset Management, Ltd | 33,466 | $5.52M | 0.00% | +33,466 | New |
| GW&K Investment Management, LLC | 32,697 | $5.39M | 0.05% | +2,118+6.9% | Added |
| Bahl & Gaynor Inc | 32,626 | $5.38M | 0.03% | −2,420−6.9% | Reduced |
| Mercer Global Advisors Inc | 31,957 | $5.27M | 0.01% | +2,358+8.0% | Added |
| Prana Capital Management, LP | 31,593 | $5.21M | 0.16% | −8,378−21.0% | Reduced |
| New York State Teachers Retirement System | 31,584 | $5.21M | 0.01% | −3,903−11.0% | Reduced |
| Van Den Berg Management I, Inc | 31,423 | $5.18M | 1.19% | +1,024+3.4% | Added |
| Thrivent Financial for Lutherans | 31,141 | $5.14M | 0.01% | −732−2.3% | Reduced |
| Royal Bank of Canada | 30,923 | $5.10M | 0.00% | +616+2.0% | Added |
| SEI Investments Co | 30,231 | $4.99M | 0.00% | +16,047+113.1% | Added |
| Baillie Gifford & Co | 29,032 | $4.79M | 0.00% | −10,083−25.8% | Reduced |
| Alps Advisors Inc | 28,895 | $4.77M | 0.02% | +28,895 | New |