| Filer | Ownership | Change % | Holdings Value | Net Change | Nb Shares | Change % | Reporting Name | Report Period |
|---|---|---|---|---|---|---|---|---|
| VANGUARD GROUP INC | 10% | $671,615,408 | 3,854,312 | The Vanguard Group | 30 Sep 2025 | |||
| FMR LLC | 6.1% | $489,379,869 | 2,296,157 | FMR LLC | 30 Jun 2025 | |||
| PRIMECAP MANAGEMENT CO/CA/ | 6% | $388,681,625 | 2,230,595 | PRIMECAP MANAGEMENT CO/CA/ | 30 Sep 2025 | |||
| GUARDIAN CAPITAL LP | 4.8% | $376,384,886 | 1,789,582 | Guardian Capital LP | 31 Dec 2024 | |||
| BlackRock, Inc. | 4.2% | -34% | $274,010,705 | -$158,215,348 | 1,572,513 | -37% | BlackRock, Inc. | 30 Sep 2025 |
| T. Rowe Price Investment Management, Inc. | 3.7% | $238,843,704 | 1,370,694 | T. Rowe Price Investment Management, Inc. | 30 Sep 2025 |
As of 30 Sep 2025, 439 institutional investors reported holding 35,599,317 shares of MARKETAXESS HOLDINGS INC - COMMON STOCK (MKTX). This represents 96% of the company’s total 37,045,784 outstanding shares.
The largest institutional shareholders of MARKETAXESS HOLDINGS INC - COMMON STOCK (MKTX) together control 71% of the company’s outstanding shares — a level of ownership often associated with strong institutional conviction and long‑term capital commitment.
| Institution | Ownership % | Shares Held | Share Change % | Portfolio % | Holdings Value |
|---|---|---|---|---|---|
| VANGUARD GROUP INC | 10% | 3,854,312 | -12% | 0.01% | $671,613,866 |
| PRIMECAP MANAGEMENT CO/CA/ | 6% | 2,230,595 | +67% | 0.3% | $388,681,183 |
| FMR LLC | 5.8% | 2,143,921 | -8.1% | 0.02% | $373,578,312 |
| VAN ECK ASSOCIATES CORP | 5.3% | 1,948,633 | +6.5% | 0.32% | $339,549,000 |
| BlackRock, Inc. | 5% | 1,850,409 | -30% | 0.01% | $322,433,696 |
| HSBC HOLDINGS PLC | 4.9% | 1,798,766 | +2977% | 0.19% | $315,448,365 |
| T. Rowe Price Investment Management, Inc. | 3.7% | 1,370,694 | -41% | 0.15% | $238,844,000 |
| GUARDCAP ASSET MANAGEMENT Ltd | 3.7% | 1,361,264 | -9.1% | 5.5% | $237,200,252 |
| STATE STREET CORP | 3.6% | 1,320,657 | -14% | 0.01% | $230,124,482 |
| AQR CAPITAL MANAGEMENT LLC | 2.6% | 951,088 | +25% | 0.11% | $165,727,188 |
| North Reef Capital Management LP | 2.5% | 911,358 | +117% | 7.4% | $158,804,132 |
| GEODE CAPITAL MANAGEMENT, LLC | 2.2% | 830,996 | -27% | 0.01% | $144,823,137 |
| Burgundy Asset Management Ltd. | 1.9% | 692,216 | +67% | 1.2% | $127,256,989 |
| Findlay Park Partners LLP | 1.7% | 644,700 | -1.8% | 1.2% | $112,338,975 |
| MILLENNIUM MANAGEMENT LLC | 1.6% | 607,556 | +41% | 0.08% | $105,866,633 |
| MORGAN STANLEY | 1.5% | 549,023 | +29% | 0.01% | $95,667,471 |
| DIMENSIONAL FUND ADVISORS LP | 1.4% | 521,129 | +1.9% | 0.02% | $90,814,989 |
| BNP PARIBAS FINANCIAL MARKETS | 1.3% | 486,106 | 0% | 0.07% | $84,703,970 |
| JPMORGAN CHASE & CO | 1.2% | 447,925 | +6.9% | 0% | $78,050,980 |
| Bank of New York Mellon Corp | 1% | 376,550 | +0.14% | 0.01% | $65,613,870 |
| TWO SIGMA INVESTMENTS, LP | 0.98% | 364,384 | +30% | 0.1% | $63,493,912 |
| CHARLES SCHWAB INVESTMENT MANAGEMENT INC | 0.85% | 315,148 | -14% | 0.01% | $54,914,539 |
| CITADEL ADVISORS LLC | 0.84% | 310,086 | -12% | 0.04% | $54,032,485 |
| RDST Capital LLC | 0.76% | 281,547 | +158% | 4.6% | $49,059,565 |
| Holocene Advisors, LP | 0.76% | 280,445 | +266% | 0.11% | $48,867,541 |
| Period | Reported Shares, Excl. Options | Value, Excl. Options | Value Change | Price (Median) | Investors |
|---|---|---|---|---|---|
| 2025 Q4 | 272,556 | $49,413,734 | +$21,228,661 | $181.25 | 34 |
| 2025 Q3 | 35,599,317 | $6,209,250,934 | -$370,735,709 | $174.25 | 439 |
| 2025 Q2 | 36,906,141 | $8,238,737,302 | +$69,030,415 | $223.34 | 521 |
| 2025 Q1 | 36,697,684 | $7,939,008,964 | -$206,618,879 | $216.35 | 502 |
| 2024 Q4 | 37,649,417 | $8,508,822,623 | +$335,097,479 | $226.04 | 505 |
| 2024 Q3 | 36,000,998 | $9,282,636,838 | -$279,922,238 | $256.20 | 498 |
| 2024 Q2 | 37,334,043 | $7,483,737,114 | +$131,736,312 | $200.53 | 456 |
| 2024 Q1 | 36,635,435 | $8,025,402,192 | -$200,014,734 | $219.25 | 451 |
| 2023 Q4 | 316,965 | $92,823,536 | -$4,708,109 | $292.85 | 6 |
| 2023 Q3 | 36,883,006 | $7,883,845,509 | -$84,725,618 | $213.64 | 463 |
| 2023 Q2 | 35,329,699 | $9,231,279,146 | -$24,803,736 | $261.42 | 494 |
| 2023 Q1 | 36,968,792 | $14,447,369,201 | +$180,836,960 | $391.29 | 514 |
| 2022 Q4 | 36,488,024 | $10,187,710,388 | +$11,615,976 | $278.89 | 485 |
| 2022 Q3 | 36,508,137 | $8,129,675,591 | -$371,684,811 | $222.49 | 442 |
| 2022 Q2 | 35,694,682 | $9,130,616,027 | +$25,011,756 | $256.01 | 475 |
| 2022 Q1 | 36,286,602 | $12,333,336,629 | -$93,513,317 | $340.20 | 482 |
| 2021 Q4 | 36,134,287 | $14,836,822,832 | -$456,976,867 | $411.27 | 488 |
| 2021 Q3 | 36,479,884 | $15,326,408,673 | +$67,847,891 | $420.69 | 497 |
| 2021 Q2 | 36,170,183 | $16,743,765,822 | +$550,531,476 | $463.59 | 534 |
| 2021 Q1 | 35,588,799 | $17,715,015,913 | +$170,626,976 | $497.92 | 564 |
| 2020 Q4 | 33,371,874 | $19,009,138,319 | +$156,242,375 | $570.56 | 579 |
| 2020 Q3 | 34,842,608 | $16,771,523,846 | -$88,547,358 | $481.59 | 545 |
| 2020 Q2 | 34,750,199 | $17,410,721,128 | -$406,283,994 | $500.92 | 545 |
| 2020 Q1 | 34,188,350 | $11,374,296,164 | -$371,135,355 | $332.57 | 455 |
| 2019 Q4 | 36,571,889 | $13,856,304,794 | -$54,743,318 | $379.11 | 486 |
| 2019 Q3 | 36,669,954 | $12,006,611,674 | -$471,072,054 | $327.50 | 443 |
| 2019 Q2 | 38,083,494 | $12,237,248,856 | +$30,725,773 | $321.42 | 404 |
| 2019 Q1 | 38,802,686 | $9,548,918,429 | +$188,472,403 | $246.08 | 335 |
| 2018 Q4 | 38,061,051 | $8,040,104,542 | +$87,103,919 | $211.31 | 340 |
| 2018 Q3 | 36,389,514 | $6,491,486,960 | -$11,252,520 | $178.49 | 300 |
| 2018 Q2 | 37,563,884 | $7,434,883,219 | +$74,128,715 | $197.86 | 308 |
| 2018 Q1 | 36,367,637 | $7,906,314,261 | +$159,506,948 | $217.44 | 315 |
| 2017 Q4 | 35,889,783 | $7,240,311,940 | +$436,954,146 | $201.75 | 315 |
| 2017 Q3 | 33,594,710 | $6,198,201,194 | +$75,688,332 | $184.51 | 306 |
| 2017 Q2 | 32,968,569 | $6,629,904,688 | +$282,213,179 | $201.10 | 326 |
| 2017 Q1 | 32,734,023 | $6,138,254,443 | +$557,858,438 | $187.49 | 322 |
| 2016 Q4 | 33,826,419 | $4,970,383,446 | -$74,090,086 | $146.92 | 314 |
| 2016 Q3 | 34,184,259 | $5,657,473,589 | -$102,430,217 | $165.59 | 303 |
| 2016 Q2 | 35,085,284 | $5,101,761,126 | -$107,275,032 | $145.40 | 287 |
| 2016 Q1 | 35,526,072 | $4,434,268,760 | +$5,628,347 | $124.83 | 255 |
| 2015 Q4 | 36,335,641 | $4,053,239,455 | +$52,149,654 | $111.59 | 236 |
| 2015 Q3 | 35,978,360 | $3,341,564,543 | +$35,959,294 | $92.88 | 222 |
| 2015 Q2 | 35,211,767 | $3,266,552,026 | +$34,649,886 | $92.77 | 221 |
| 2015 Q1 | 34,972,537 | $2,898,641,940 | -$41,718,110 | $82.90 | 201 |
| 2014 Q4 | 35,788,286 | $2,566,681,526 | -$42,257,422 | $71.71 | 186 |
| 2014 Q3 | 36,970,687 | $2,287,001,768 | +$21,167,062 | $61.86 | 176 |
| 2014 Q2 | 36,765,203 | $1,987,518,389 | +$81,410,994 | $54.06 | 173 |
| 2014 Q1 | 35,360,779 | $2,093,031,283 | +$25,478,983 | $59.22 | 187 |