| 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% | $496,084,646 | 2,296,157 | FMR LLC | 30 Jun 2025 | |||
| PRIMECAP MANAGEMENT CO/CA/ | 6% | $388,681,402 | 2,230,595 | PRIMECAP MANAGEMENT CO/CA/ | 30 Sep 2025 | |||
| GUARDIAN CAPITAL LP | 4.8% | $391,918,458 | 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% | $238,843,567 | 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 | 296,717 | $53,792,923 | +$20,498,776 | $181.25 | 40 |
| 2025 Q3 | 35,599,317 | $6,209,250,934 | -$370,735,691 | $174.25 | 439 |
| 2025 Q2 | 36,906,141 | $8,238,737,302 | +$69,030,421 | $223.34 | 521 |
| 2025 Q1 | 36,701,934 | $7,939,928,818 | -$208,135,992 | $216.35 | 504 |
| 2024 Q4 | 37,663,830 | $8,512,050,353 | +$221,536,894 | $226.04 | 509 |
| 2024 Q3 | 36,519,858 | $9,415,565,593 | -$161,265,493 | $256.20 | 501 |
| 2024 Q2 | 37,293,324 | $7,475,569,215 | +$35,784,043 | $200.53 | 459 |
| 2024 Q1 | 37,079,883 | $8,122,848,140 | -$65,308,486 | $219.25 | 452 |
| 2023 Q4 | 37,167,496 | $10,873,714,480 | -$1,710,577 | $292.85 | 494 |
| 2023 Q3 | 37,345,565 | $7,982,666,093 | -$87,422,762 | $213.64 | 473 |
| 2023 Q2 | 37,477,705 | $9,792,813,093 | +$133,215,305 | $261.42 | 504 |
| 2023 Q1 | 37,103,081 | $14,499,895,648 | +$181,992,782 | $391.29 | 524 |
| 2022 Q4 | 36,918,316 | $10,309,138,894 | +$25,191,506 | $278.89 | 496 |
| 2022 Q3 | 36,769,971 | $8,187,933,057 | -$371,359,929 | $222.49 | 458 |
| 2022 Q2 | 36,145,484 | $9,253,392,614 | -$43,291,057 | $256.01 | 486 |
| 2022 Q1 | 36,324,543 | $12,346,248,196 | -$96,523,408 | $340.20 | 491 |
| 2021 Q4 | 36,565,850 | $15,012,441,196 | -$431,434,922 | $411.27 | 500 |
| 2021 Q3 | 36,493,671 | $15,332,316,477 | +$98,880,935 | $420.69 | 499 |
| 2021 Q2 | 36,191,606 | $16,753,698,372 | +$549,457,628 | $463.59 | 538 |
| 2021 Q1 | 35,616,372 | $17,728,743,398 | +$172,602,984 | $497.92 | 574 |
| 2020 Q4 | 35,377,646 | $20,153,555,590 | +$247,364,250 | $570.56 | 591 |
| 2020 Q3 | 34,854,950 | $16,777,482,054 | -$86,311,113 | $481.59 | 550 |
| 2020 Q2 | 35,015,026 | $17,543,388,003 | -$342,712,390 | $500.92 | 550 |
| 2020 Q1 | 35,750,274 | $11,893,744,460 | -$284,917,353 | $332.57 | 461 |
| 2019 Q4 | 36,587,948 | $13,862,385,897 | -$57,400,135 | $379.11 | 494 |
| 2019 Q3 | 36,696,332 | $12,015,245,050 | -$473,002,822 | $327.50 | 450 |
| 2019 Q2 | 38,137,349 | $12,254,614,671 | -$119,940,774 | $321.42 | 410 |
| 2019 Q1 | 38,830,575 | $9,555,780,176 | +$194,322,504 | $246.08 | 339 |
| 2018 Q4 | 38,083,705 | $8,044,897,019 | +$87,995,089 | $211.31 | 343 |
| 2018 Q3 | 37,678,828 | $6,721,620,339 | +$10,308,763 | $178.49 | 305 |
| 2018 Q2 | 37,586,678 | $7,439,397,589 | +$4,771,023 | $197.86 | 311 |
| 2018 Q1 | 37,548,096 | $8,162,995,116 | +$142,092,511 | $217.44 | 318 |
| 2017 Q4 | 37,092,840 | $7,483,018,904 | +$427,852,392 | $201.75 | 319 |
| 2017 Q3 | 34,843,099 | $6,428,666,243 | +$96,877,377 | $184.51 | 309 |
| 2017 Q2 | 34,630,947 | $6,964,267,154 | +$264,298,298 | $201.10 | 330 |
| 2017 Q1 | 34,051,990 | $6,385,359,016 | +$584,796,982 | $187.49 | 324 |
| 2016 Q4 | 33,826,702 | $4,970,423,446 | -$74,090,061 | $146.92 | 315 |
| 2016 Q3 | 34,184,542 | $5,657,518,589 | -$103,588,959 | $165.59 | 304 |
| 2016 Q2 | 35,090,751 | $5,102,553,126 | -$109,320,540 | $145.40 | 289 |
| 2016 Q1 | 36,175,647 | $4,515,352,760 | +$6,046,678 | $124.83 | 260 |
| 2015 Q4 | 36,390,171 | $4,059,324,455 | +$50,937,749 | $111.59 | 238 |
| 2015 Q3 | 36,053,292 | $3,347,889,543 | +$38,273,765 | $92.88 | 225 |
| 2015 Q2 | 35,718,536 | $3,313,563,026 | +$31,692,794 | $92.77 | 222 |
| 2015 Q1 | 35,122,126 | $2,911,041,940 | -$38,050,146 | $82.90 | 203 |
| 2014 Q4 | 36,014,919 | $2,582,933,526 | -$46,256,629 | $71.71 | 189 |
| 2014 Q3 | 37,102,099 | $2,295,130,768 | +$19,416,445 | $61.86 | 177 |
| 2014 Q2 | 36,924,915 | $1,996,152,389 | +$80,211,864 | $54.06 | 174 |
| 2014 Q1 | 35,360,779 | $2,093,031,283 | +$25,110,185 | $59.22 | 187 |