Marketaxess HoldingsMKTX
13F holders, Q2 2026 (June 30)397holders −55
51new positions
106sold out
9famous investors
$113.45avg. 13F price*
At the end of Q2 2026, 397 institutions reported holding Marketaxess Holdings Inc. (MKTX) in their 13F filings, down 55 from Q1 2026. 51 opened new positions and 106 sold out. The largest holders were BlackRock, Inc. ($453.9M), Primecap Management Co. ($397.8M) and North Reef Capital Management LP ($385.3M). 9 famous investors held it, including Cliff Asness (0.1% of AQR Capital Management's portfolio), Paul Tudor Jones (0.1% of Tudor Investment Corporation's portfolio) and Ken Griffin (0.0% of Citadel Advisors's portfolio).
- Company
- Marketaxess Holdings Inc.
- CUSIP
- 57060D108
- Latest filing quarter
- Q2 2026
History
Number of 13F holders
Total Exit/New Position Q1 2026 → Q2 2026
| Institutions | Total Value | |
|---|---|---|
| New Positions | 51 | $160.2M |
| Exits | 106 | $211.8M |
All 13F filers, Q1 2026 → Q2 2026: 6,579,969 shares bought and 6,110,062 shares sold, net +469,907 shares. Counts holders who added, trimmed, opened or closed a position; split-adjusted.
Ownership 397 holders
| BlackRock, Inc. | 0.01% | Reduce -1.9% | 3,999,836 | $453.9M |
| Primecap Management Co. | 0.24% | Add +4.7% | 3,504,905 | $397.8M |
| North Reef Capital Management LP | 14.77% | Add +81.1% | 3,395,000 | $385.3M |
| Vanguard Portfolio Management LLC | 0.01% | Reduce -2.9% | 2,100,273 | $238.4M |
| AQR Capital Management | 0.08% | Reduce -25.9% | 1,987,288 | $222.8M |
| Vanguard Capital Management LLC | 0.00% | Reduce -3.9% | 1,546,670 | $175.5M |
| FMR LLC | 0.01% | Reduce -7.5% | 1,404,998 | $159.5M |
| State Street Corp. | 0.00% | Add +0.1% | 1,281,769 | $145.4M |
| Neuberger Berman Group LLC | 0.09% | Add +27.3% | 1,229,929 | $139.6M |
| Goldman Sachs Group Inc. | 0.01% | Add +102.6% | 1,031,309 | $117.0M |
| Bank of Montreal | 0.04% | Reduce -0.3% | 1,017,024 | $115.4M |
| Geode Capital Management, LLC | 0.01% | Add +15.3% | 994,772 | $112.9M |
| Van Eck Associates Corp. | 0.06% | Reduce -25.4% | 924,617 | $104.9M |
| Dimensional Fund Advisors LP | 0.01% | Add +2.8% | 597,894 | $67.8M |
| Norges Bank | 0.01% | — | 572,422 | $65.0M |
| GUARDCAP ASSET MANAGEMENT Ltd | 4.42% | Reduce -16.6% | 536,324 | $62.2M |
| Two Sigma Investments, LP | 0.05% | Add +3.8% | 543,890 | $61.7M |
| Azora Capital LP | 2.45% | New | 513,081 | $58.2M |
| Davis Asset Management, L.P. | 1.44% | Add +359.4% | 500,000 | $56.7M |
| Citadel Advisors | 0.03% | Add +486.3% | 481,689 | $54.7M |
| JPMorgan Chase & Co. | 0.00% | Add +1.2% | 438,001 | $48.3M |
| Morgan Stanley | 0.00% | Reduce -13.8% | 422,864 | $48.0M |
| Los Angeles Capital Management LLC | 0.16% | Add +3992.1% | 392,065 | $44.5M |
| Charles Schwab Investment Management Inc. | 0.01% | Reduce -2.3% | 330,815 | $37.5M |
| Bank of America Corp. | 0.00% | Add +15.0% | 303,517 | $34.4M |
| UBS Group AG | 0.01% | Add +2.4% | 278,745 | $31.6M |
| Bank of New York Mellon Corp | 0.00% | Reduce -11.1% | 257,642 | $29.2M |
| RDST Capital LLC | 2.32% | Reduce -16.3% | 247,112 | $28.0M |
| Northern Trust Corp. | 0.00% | Add +4.3% | 246,521 | $28.0M |
| Cooke & Bieler LP | 0.31% | Add +5.5% | 238,755 | $27.1M |
| Vanguard Fiduciary Trust Co. | 0.01% | Reduce -2.5% | 223,656 | $25.4M |
| HRT Financial LP | 0.04% | Add +50.3% | 205,854 | $23.4M |
| BNP PARIBAS ASSET MANAGEMENT Holding S.A. | 0.02% | Add +0.4% | 204,309 | $23.2M |
| Victory Capital Management Inc. | 0.01% | Reduce -1.1% | 202,731 | $23.0M |
| Renaissance Technologies | 0.03% | Add +19.7% | 200,000 | $22.7M |
| Connor, Clark & Lunn Investment Management Ltd. | 0.04% | Add +7.2% | 186,658 | $21.2M |
| Principal Financial Group Inc. | 0.01% | Reduce -4.7% | 173,312 | $19.7M |
| Freestone Grove Partners LP | 0.13% | New | 172,799 | $19.6M |
| Public Sector Pension Investment Board | 0.05% | Reduce -18.1% | 157,338 | $17.9M |
| Sone Capital Management, LLC | 1.34% | Reduce -2.8% | 155,522 | $17.7M |
| Nuveen, LLC | 0.00% | Add +0.3% | 148,468 | $16.8M |
| Invesco Ltd. | 0.00% | Add +19.0% | 140,817 | $16.0M |
| Tudor Investment Corporation | 0.06% | New | 137,847 | $15.6M |
| Champlain Investment Partners, LLC | 0.40% | Reduce -35.2% | 136,087 | $15.4M |
| Arrowstreet Capital, Limited Partnership | 0.01% | Reduce -58.7% | 122,005 | $13.8M |
| M&G PLC | 0.07% | New | 121,309 | $13.7M |
| Bank of Nova Scotia | 0.02% | Add +368.9% | 115,410 | $13.1M |
| CIBC Bancorp USA Inc. | 0.02% | Add +3373.3% | 114,968 | $13.0M |
| Eubel Brady & Suttman Asset Management Inc. | 1.65% | Add +2.5% | 114,292 | $13.0M |
| Raymond James Financial Inc. | 0.00% | Reduce -6.0% | 114,278 | $13.0M |
| Algert Global LLC | 0.15% | Add +478.2% | 112,400 | $12.8M |
| Millennium Management | 0.01% | Reduce -89.9% | 109,590 | $12.4M |
| Heartland Advisors Inc. | 0.53% | Add +79.9% | 104,926 | $11.9M |
| UBS AM, a distinct business unit of UBS ASSET MANAGEMENT AMERICAS LLC | 0.00% | Reduce -2.1% | 104,853 | $11.9M |
| Walleye Capital LLC | 0.06% | Reduce -71.8% | 94,002 | $10.7M |
| Healthcare of Ontario Pension Plan Trust Fund | 0.01% | Reduce -36.8% | 92,100 | $10.5M |
| Invenomic Capital Management LP | 0.61% | New | 90,441 | $10.3M |
| Legal & General Group Plc | 0.00% | Reduce -6.9% | 84,460 | $9.6M |
| Ameriprise Financial Inc. | 0.00% | Add +13.6% | 79,372 | $9.0M |
| Jump Financial, LLC | 0.09% | Add +525.7% | 78,566 | $8.9M |
| Cibc World Market Inc. | 0.01% | Add +1861.1% | 78,286 | $8.9M |
| Jane Street Group, LLC | 0.01% | Add +507.2% | 77,353 | $8.8M |
| Flossbach Von Storch SE | 0.04% | Reduce -30.6% | 75,000 | $8.5M |
| Rhumbline Advisers | 0.01% | Reduce -19.2% | 72,725 | $8.3M |
| Swiss National Bank | 0.00% | Reduce -3.1% | 71,400 | $8.1M |
| Trexquant Investment LP | 0.05% | Reduce -5.3% | 66,681 | $7.6M |
| Citigroup Inc. | 0.00% | Add +202.8% | 64,762 | $7.3M |
| Alpha Omega Wealth Management LLC | 1.06% | Add +464.1% | 61,453 | $7.0M |
| Stifel Financial Corp. | 0.01% | Add +58.6% | 56,622 | $6.4M |
| Sei Investments Co. | 0.01% | Add +85.3% | 56,022 | $6.4M |
| Y-Intercept (Hong Kong) Ltd | 0.12% | Add +1694.1% | 54,792 | $6.2M |
| Van Den Berg Management I, Inc. | 1.25% | Add +65.7% | 52,054 | $5.9M |
| Brevan Howard Capital Management LP | 0.09% | New | 51,050 | $5.8M |
| State of Wisconsin Investment Board | 0.01% | Add +43.8% | 51,004 | $5.8M |
| California Public Employees Retirement System | 0.00% | Reduce -31.1% | 49,950 | $5.7M |
| First Eagle Investment Management, LLC | 0.01% | Add +225250.0% | 49,577 | $5.6M |
| D. E. Shaw & Co. | 0.00% | Add +1347.7% | 47,977 | $5.4M |
| Quantinno Capital Management LP | 0.01% | Add +1.2% | 47,575 | $5.4M |
| First Trust Advisors LP | 0.00% | Add +18.1% | 46,658 | $5.3M |
| Wilson Asset Management (international) PTY Ltd. | 1.40% | Add +14.1% | 45,042 | $5.1M |
| Mariner, LLC | 0.01% | Reduce -43.4% | 44,790 | $5.1M |
| Cerity Partners LLC | 0.01% | Reduce -47.2% | 44,382 | $5.0M |
| American Century Companies Inc. | 0.00% | Add +174.0% | 44,363 | $5.0M |
| T. Rowe Price Investment Management, Inc. | 0.00% | Reduce -1.0% | 43,842 | $5.0M |
| California State Teachers Retirement System | 0.00% | Reduce -2.9% | 42,443 | $4.8M |
| DF Dent & Co. Inc. | 0.08% | Reduce -4.1% | 39,303 | $4.5M |
| Royal Bank of Canada | 0.00% | Add +26.5% | 39,121 | $4.4M |
| Marshall Wace, LLP | 0.00% | New | 39,090 | $4.4M |
| T. Rowe Price Associates Inc. | 0.00% | Add +4.3% | 38,521 | $4.4M |
| Holocene Advisors, LP | 0.01% | Reduce -12.6% | 38,269 | $4.3M |
| Prana Capital Management, LP | 0.13% | Add +19.9% | 37,877 | $4.3M |
| Corebridge Financial, Inc. | 100.00% | — | 38,650 | $4.2M |
| FJ Capital Management LLC | 0.55% | New | 37,237 | $4.2M |
| Taylor Hoffman Capital Management LLC | 0.99% | Add +24.4% | 35,895 | $4.1M |
| BNP Paribas Financial Markets | 0.00% | Reduce -89.0% | 35,288 | $4.0M |
| State Board of Administration of Florida Retirement System | 0.01% | Reduce -1.8% | 34,407 | $3.9M |
| Readystate Asset Management LP | 0.25% | Add +35.5% | 33,794 | $3.8M |
| HSBC Holdings PLC | 0.00% | Add +59.8% | 33,576 | $3.8M |
| VANGUARD ASSET MANAGEMENT, Ltd | 0.00% | Add +0.3% | 33,563 | $3.8M |
| GW&K Investment Management, LLC | 0.03% | Reduce -0.0% | 32,689 | $3.7M |
"% of holder's portfolio" is MKTX's weight in each manager's 13F, not the share of Marketaxess Holdings Inc. the manager owns.