Latest Period
Q1 2026
Security Snapshot
MARKETAXESS HOLDINGS INC - Common Stock, $0.003 par value (MKTX) Institutional Ownership
CUSIP: 57060D108
13F Institutional Holders and Ownership History from Q1 2014 to Q1 2026
Institutions Reporting
444
Shares (Excl. Options)
38,218,536
Price
$164.98
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- Security type / class
- Equity / Common Stock, $0.003 par value
- Symbol
- MKTX on Nasdaq
- All holders as of 31 Mar 2026
- Q1 2026
- Total 13F shares
- 38,218,536
- Total 13F value
- $6,305,867,272
- Portfolio coverage rank
- 0.01%
- Share change
- +1,560,642
- Value change
- +$236,666,223
- Number of holders
- 444
- Shares outstanding
- 35,578,748
- SEC-reported price per share
- $130.94
- Insider filing price
- $130.94
Latest holder snapshot
5 signals
Issuer context
Names, identifiers, and filing context for this profile.
3 identity fields
13F Shares, Excluding Options vs Price
13F Value, Excluding Options
Total Investors
Key facts
- MKTX - MARKETAXESS HOLDINGS INC - Common Stock, $0.003 par value is tracked under CUSIP 57060D108.
- 444 institutions reported positions in Q1 2026.
- 9 significant owners is listed from Schedule 13D/13G reporting.
Change
- Holder count moved from 484 to 444 between Q4 2025 and Q1 2026.
- SEC-reported value moved from $6,617,255,443 to $6,305,867,272.
Research use
- You can quickly see who holds this security, then open quarter and manager detail pages for full evidence.
- 13F and Schedule 13D/13G sections are kept together so you can cross-check institutional and beneficial ownership context.
Evidence
Source: SEC Form 13F
Open SEC evidence
Latest holder context comes from 444 institutions filings for Q1 2026.
Security key
57060D108
Latest holder period
Q1 2026
13F holders
444
13D/G owners
9
CIK / CUSIP context first
Open Q1 2026 holders
MKTX full holder history
MARKETAXESS HOLDINGS INC SEC filings
MARKETAXESS HOLDINGS INC company facts
MARKETAXESS HOLDINGS INC insider transactions
Broader feeds
Recent Quarterly Holder Reports
Open recent reporting periods for CUSIP 57060D108:
13D/G owners
Significant owners
Large-stake holder rows connected to Schedule 13D/G evidence.
Rows
9
Security
MKTX
| Filer | Ownership | Change % | Holdings Value | Net Change | Nb Shares | Change % | Reporting Name | Report Period |
|---|---|---|---|---|---|---|---|---|
| BlackRock, Inc. | 11% | +10% | $731,260,235 | +$64,142,960 | 4,034,537 | +9.6% | BlackRock, Inc. | 31 Jan 2026 |
| PRIMECAP MANAGEMENT CO/CA/ | 8.5% | +43% | $575,545,781 | +$171,250,438 | 3,175,425 | +42% | PRIMECAP MANAGEMENT CO/CA/ | 31 Dec 2025 |
| AQR CAPITAL MANAGEMENT LLC | 6.9% | $463,655,081 | 2,558,097 | AQR Capital Management, LLC | 31 Dec 2025 | |||
| VANGUARD PORTFOLIO MANAGEMENT LLC | 6.1% | $357,691,531 | 2,168,085 | Vanguard Portfolio Management | 31 Mar 2026 | |||
| VANGUARD CAPITAL MANAGEMENT LLC | 5.3% | $312,158,376 | 1,892,096 | Vanguard Capital Management | 31 Mar 2026 | |||
| North Reef Capital Management LP | 5.3% | $328,406,250 | 1,875,000 | North Reef Capital Management LP | 31 Mar 2026 | |||
| GUARDIAN CAPITAL LP | 4.8% | $391,918,458 | 1,789,582 | Guardian Capital LP | 31 Dec 2024 | |||
| FMR LLC | 4.2% | -32% | $262,887,720 | -$139,284,184 | 1,500,929 | -35% | FMR LLC | 31 Mar 2026 |
| 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 31 Mar 2026, 444 institutional investors reported holding 38,218,536 shares of MARKETAXESS HOLDINGS INC - Common Stock, $0.003 par value (MKTX). This represents 107% of the company’s total 35,578,748 outstanding shares.
13F concentration
Top 25 institutional shareholders
Largest 13F positions for this security by reported shares and value.
Top holder share
81%
| Institution | Ownership % | Shares Held | Share Change % | Portfolio % | Holdings Value |
|---|---|---|---|---|---|
| BlackRock, Inc. | 11% | 4,075,154 | +8.8% | 0.01% | $672,318,906 |
| PRIMECAP MANAGEMENT CO/CA/ | 9.4% | 3,347,125 | +5.4% | 0.43% | $552,208,683 |
| AQR CAPITAL MANAGEMENT LLC | 7.5% | 2,683,745 | +4.9% | 0.2% | $442,764,395 |
| VANGUARD PORTFOLIO MANAGEMENT LLC | 6.1% | 2,163,671 | 0% | 0.02% | $356,962,442 |
| North Reef Capital Management LP | 5.3% | 1,875,000 | +17% | 11% | $309,337,500 |
| VANGUARD CAPITAL MANAGEMENT LLC | 4.5% | 1,609,259 | 0% | 0.01% | $265,495,550 |
| FMR LLC | 4.3% | 1,519,421 | -24% | 0.01% | $250,674,082 |
| STATE STREET CORP | 3.6% | 1,280,857 | +2.6% | 0.01% | $211,315,788 |
| VAN ECK ASSOCIATES CORP | 3.5% | 1,239,285 | +2% | 0.15% | $204,457,000 |
| MILLENNIUM MANAGEMENT LLC | 3.1% | 1,087,188 | +260% | 0.13% | $179,364,276 |
| BANK OF MONTREAL /CAN/ | 2.9% | 1,020,559 | +7.3% | 0.07% | $168,371,804 |
| NEUBERGER BERMAN GROUP LLC | 2.7% | 966,029 | +76% | 0.12% | $159,375,424 |
| GEODE CAPITAL MANAGEMENT, LLC | 2.4% | 862,987 | +3.6% | 0.01% | $142,403,175 |
| GUARDCAP ASSET MANAGEMENT Ltd | 1.8% | 643,370 | -44% | 6.1% | $106,351,076 |
| DIMENSIONAL FUND ADVISORS LP | 1.6% | 581,484 | +10% | 0.02% | $95,932,833 |
| TWO SIGMA INVESTMENTS, LP | 1.5% | 524,024 | -1.8% | 0.07% | $86,453,480 |
| GOLDMAN SACHS GROUP INC | 1.4% | 509,043 | +195% | 0.01% | $83,981,929 |
| MORGAN STANLEY | 1.4% | 490,537 | +15% | 0% | $80,929,006 |
| Findlay Park Partners LLP | 1.4% | 480,600 | -10% | 1.1% | $79,289,388 |
| JPMORGAN CHASE & CO | 1.2% | 432,826 | -21% | 0% | $71,316,778 |
| CHARLES SCHWAB INVESTMENT MANAGEMENT INC | 0.95% | 338,507 | +6.3% | 0.01% | $55,846,885 |
| Walleye Capital LLC | 0.94% | 332,723 | +97% | 0.34% | $54,892,641 |
| BNP PARIBAS FINANCIAL MARKETS | 0.9% | 319,302 | 0% | 0.03% | $52,678,444 |
| ARROWSTREET CAPITAL, LIMITED PARTNERSHIP | 0.83% | 295,470 | +2.3% | 0.03% | $48,746,641 |
| RDST Capital LLC | 0.83% | 295,267 | -5% | 4.7% | $48,713,150 |
Quarter history
Institutional holders across reporting periods
Holder count, reported shares/value, and median price by quarter.
Periods
49
Latest
Q1 2026
Rows shown
1-25 of 49
| Period | 13F Shares, Excl. Options | Value, Excl. Options | Value Change | Price (Median) | Investors |
|---|---|---|---|---|---|
| 2026 Q1 | 38,218,536 | $6,305,867,272 | +$236,666,223 | $164.98 | 444 |
| 2025 Q4 | 36,512,510 | $6,617,255,443 | +$306,972,216 | $181.25 | 484 |
| 2025 Q3 | 35,596,429 | $6,208,747,159 | -$376,325,012 | $174.25 | 444 |
| 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 |