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MKTX

Marketaxess Holdings Inc
$115.63 +0.76 (+0.66%) At close · Jul 15
Market Cap
$4.10B
Shares
35,539,453

Institutional ownership from SEC Form 13F filings. Investment managers with more than $100 million in U.S. equities must disclose their positions every quarter, within 45 days of quarter-end, so the holdings shown can lag the market by up to a quarter.

The Jun 30, 2026 filing window is still open — showing the latest known positions. Funds that have not filed yet carry their prior-quarter positions; a fund that filed without this stock counts as sold out.
Holders: 442
Total Value: $5,969,869,140
Total Shares: 36,233,496
Showing 1–100 of 450 holdings by value · page 1 of 5

Institutional Ownership Trend

26 quarters

Superinvestors Holding MKTX

All superinvestors →
Joel Greenblatt $9,933,940 Ray Dalio $925,207

Holder Concentration

Across 449 13F filers
Top Holder
11.2%
Jun 2023 → Mar 2026 · range 10.4% – 12.2%
of institutional value
Top 5
37.4%
Jun 2023 → Mar 2026 · range 34.9% – 41.7%
of institutional value
Top 10
54.7%
Jun 2023 → Mar 2026 · range 50.0% – 58.5%
of institutional value
HHI
413
Jun 2023 → Mar 2026 · range 379 – 457
Broadly held
Showing 100 of 450
All Common Calls Puts
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Holder Value (USD) % of 13F Shares Open
Mega BlackRock, Inc. $672,318,901 11.26% 4,075,154
Mega PRIMECAP MANAGEMENT CO/CA/ $552,208,682 9.25% 3,347,125
Mega AQR CAPITAL MANAGEMENT LLC $442,764,246 7.42% 2,683,745
Mid North Reef Capital Management LP $309,337,500 5.18% 1,875,000
Mega VANGUARD CAPITAL MANAGEMENT LLC $265,495,549 4.45% 1,609,259
Mega FMR LLC $250,674,074 4.20% 1,519,421
Mega STATE STREET CORP $211,315,787 3.54% 1,280,857
Mega VAN ECK ASSOCIATES CORP $204,457,238 3.42% 1,239,285
Mega MILLENNIUM MANAGEMENT LLC $179,364,276 3.00% 1,087,188
Mega BANK OF MONTREAL /CAN/ Bank $168,371,818 2.82% 1,020,559
Mega NEUBERGER BERMAN GROUP LLC $159,375,463 2.67% 966,029
Mega GEODE CAPITAL MANAGEMENT, LLC $142,375,594 2.38% 862,987
Mid GUARDCAP ASSET MANAGEMENT Ltd $106,143,182 1.78% 643,370
Mega DIMENSIONAL FUND ADVISORS LP $95,933,228 1.61% 581,484
Mega TWO SIGMA INVESTMENTS, LP $86,453,479 1.45% 524,024
Mega GOLDMAN SACHS GROUP INC $83,981,913 1.41% 509,043
Mega MORGAN STANLEY $80,928,787 1.36% 490,537
Mid Findlay Park Partners LLP $79,289,388 1.33% 480,600
Mega JPMORGAN CHASE & CO $71,407,627 1.20% 432,826
Mega CHARLES SCHWAB INVESTMENT MANAGEMENT INC $55,846,884 0.94% 338,507
Large Walleye Capital LLC $54,892,640 0.92% 332,723
Mega BNP PARIBAS ARBITRAGE, SA $52,678,443 0.88% 319,302
Mega ARROWSTREET CAPITAL, LIMITED PARTNERSHIP $48,746,640 0.82% 295,470
Small RDST Capital LLC $48,713,149 0.82% 295,267
Mega Bank of New York Mellon Corp Bank $47,834,296 0.80% 289,940
Mega UBS Group AG $44,913,823 0.75% 272,238
Mega BANK OF AMERICA CORP /DE/ Bank $43,531,290 0.73% 263,858
Mega Amundi $42,681,645 0.71% 258,708
Large Point72 Asset Management, L.P. $41,711,068 0.70% 252,825
Large Driehaus Capital Management LLC $39,472,454 0.66% 239,256
Mega NORTHERN TRUST CORP Bank $38,993,020 0.65% 236,350
Mega VANGUARD FIDUCIARY TRUST CO Bank $37,850,866 0.63% 229,427
Mid COOKE & BIELER LP $37,321,775 0.63% 226,220
Mid Champlain Investment Partners, LLC $34,658,338 0.58% 210,076
Mega VICTORY CAPITAL MANAGEMENT INC $33,809,681 0.57% 204,932
Large BNP PARIBAS ASSET MANAGEMENT Holding S.A. $33,561,055 0.56% 203,425
Large Public Sector Pension Investment Board Pension $31,714,105 0.53% 192,230
Mega PRINCIPAL FINANCIAL GROUP INC $29,993,033 0.50% 181,798
Large Connor, Clark & Lunn Investment Management Ltd. $28,716,253 0.48% 174,059
Large IEQ CAPITAL, LLC $28,688,537 0.48% 173,891
Mega JANUS HENDERSON GROUP PLC $27,848,128 0.47% 168,797
Large RENAISSANCE TECHNOLOGIES LLC $27,568,158 0.46% 167,100
Mid Sone Capital Management, LLC $26,391,190 0.44% 159,966
Mega Nuveen, LLC $24,430,402 0.41% 148,081
Large HEALTHCARE OF ONTARIO PENSION PLAN TRUST FUND Pension $24,025,707 0.40% 145,628
Large HRT FINANCIAL LP $22,594,340 0.38% 136,952
Mega RAYMOND JAMES FINANCIAL INC $20,067,341 0.34% 121,635
Mega Invesco Ltd. $19,522,411 0.33% 118,332
Mega MILLENNIUM MANAGEMENT LLC $19,500,636 0.33% 118,200
Small EUBEL BRADY & SUTTMAN ASSET MANAGEMENT INC $18,392,465 0.31% 111,483
Mid Davis Asset Management, L.P. $17,957,413 0.30% 108,846
Large FLOSSBACH VON STORCH SE $17,834,338 0.30% 108,100
Mega UBS AM, a distinct business unit of UBS ASSET MANAGEMENT AMERICAS LLC $17,671,003 0.30% 107,110
Mid Polar Asset Management Partners Inc. $17,186,626 0.29% 104,174
Mega Legal & General Group Plc $14,966,984 0.25% 90,720
Mega RHUMBLINE ADVISERS $14,841,765 0.25% 89,961
Large Cerity Partners LLC $13,858,483 0.23% 84,001
Small Goodman Financial Corp $13,720,231 0.23% 83,163
Mega CITADEL ADVISORS LLC $13,554,591 0.23% 82,159
Large Mariner, LLC $13,057,176 0.22% 79,144
Large CWM, LLC $12,204,890 0.20% 73,978
Mega Swiss National Bank Bank $12,159,026 0.20% 73,700
Mega California Public Employees Retirement System Pension $11,964,679 0.20% 72,522
Large Trexquant Investment LP $11,610,962 0.19% 70,378
Mega AMERIPRISE FINANCIAL INC $11,529,626 0.19% 69,885
Large Gotham Asset Management, LLC $9,933,940 0.17% 60,213
Mid HEARTLAND ADVISORS INC $9,623,943 0.16% 58,334
Small ICICI Prudential Asset Management Co Ltd $8,131,699 0.14% 49,289
Large Quantinno Capital Management LP $7,752,410 0.13% 46,990
Mega SUSQUEHANNA INTERNATIONAL GROUP, LLP $7,721,064 0.13% 46,800
Mega T. Rowe Price Investment Management, Inc. $7,304,984 0.12% 44,278
Large Holocene Advisors, LP $7,225,959 0.12% 43,799
Large CALIFORNIA STATE TEACHERS RETIREMENT SYSTEM Pension $7,207,646 0.12% 43,688
Large Schonfeld Strategic Advisors LLC $7,027,488 0.12% 42,596
Mega ALLIANCEBERNSTEIN L.P. $6,806,909 0.11% 41,259
Mid DF DENT & CO INC $6,764,180 0.11% 41,000
Mega FIRST TRUST ADVISORS LP $6,515,390 0.11% 39,492
Small WILSON ASSET MANAGEMENT (INTERNATIONAL) PTY LTD $6,510,275 0.11% 39,461
Mid FIDEURAM - INTESA SANPAOLO PRIVATE BANKING S.P.A. $6,495,262 0.11% 39,370
Large Caisse de depot et placement du Quebec $6,415,577 0.11% 38,887
Mid Y-Intercept (Hong Kong) Ltd $6,218,344 0.10% 54,792
Mega DEUTSCHE BANK AG\ Bank $6,182,787 0.10% 37,476
Mega PRICE T ROWE ASSOCIATES INC /MD/ $6,091,061 0.10% 36,920
Mega SUSQUEHANNA INTERNATIONAL GROUP, LLP $6,021,770 0.10% 36,500
Large STIFEL FINANCIAL CORP $5,889,290 0.10% 35,697
Large STATE OF WISCONSIN INVESTMENT BOARD $5,852,170 0.10% 35,472
Large STATE BOARD OF ADMINISTRATION OF FLORIDA RETIREMENT SYSTEM Pension $5,780,404 0.10% 35,037
Large CANADA LIFE ASSURANCE Co Insurance $5,594,306 0.09% 33,909
Large PRUDENTIAL FINANCIAL INC $5,567,085 0.09% 33,744
Mega VANGUARD ASSET MANAGEMENT, Ltd $5,521,220 0.09% 33,466
Large GW&K Investment Management, LLC $5,394,350 0.09% 32,697
Large BAHL & GAYNOR INC $5,382,637 0.09% 32,626
Large MERCER GLOBAL ADVISORS INC /ADV $5,272,265 0.09% 31,957
Mid Prana Capital Management, LP $5,212,213 0.09% 31,593
Large NEW YORK STATE TEACHERS RETIREMENT SYSTEM Pension $5,210,728 0.09% 31,584
Small VAN DEN BERG MANAGEMENT I, INC $5,184,166 0.09% 31,423
Large Thrivent Financial for Lutherans $5,137,641 0.09% 31,141
Mega ROYAL BANK OF CANADA Bank $5,101,673 0.09% 30,923
Large SEI INVESTMENTS CO $4,987,510 0.08% 30,231
Large BAILLIE GIFFORD & CO $4,789,698 0.08% 29,032
Key facts CIK 1278021 CUSIP 57060D108 13F (30d) 51 filings 29 filers Visit website Investor relations

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