Institutional Ownership
Marketaxess Hldgs Inc
CUSIP 57060D108COMMKTXQ1 2026
13D / 13G Filings
34
Schedule 13D/13G on record
Beneficial Filers
12
Distinct reporting persons
Largest Stake
11.9%
Max % of class reported
Institutional Holders
437
13F filers (latest quarter)
Beneficial Owners — Schedule 13D / 13G
34 filings · latest Feb 13, 2026
| # | Filed | Reporting Person | Form | % of Class | Shares | Filing |
|---|---|---|---|---|---|---|
| 1 | Feb 13, 2026 | Aqr Capital Management, LLC | 13G | 6.9% | 2.56M | SEC |
| 2 | Feb 11, 2026 | Primecap Management Co/Ca/ | 13G/A | 8.5% | 3.18M | SEC |
| 3 | Feb 6, 2026 | Blackrock, Inc. | 13G/A | 10.9% | 4.03M | SEC |
| 4 | Jan 21, 2026 | Blackrock, Inc. | 13G | 9.9% | 3.68M | SEC |
| 5 | Nov 14, 2025 | T. Rowe Price Investment Management, Inc. | 13G/A | 3.7% | 1.37M | SEC |
| 6 | Nov 13, 2025 | Primecap Management Co/Ca/ | 13G | 6.0% | 2.23M | SEC |
| 7 | Oct 31, 2025 | The Vanguard Group | 13G/A | 10.3% | 3.85M | SEC |
| 8 | Oct 17, 2025 | Blackrock, Inc. | 13G/A | 4.2% | 1.57M | SEC |
| 9 | Aug 6, 2025 | Fmr LLC | 13G/A | 6.1% | 2.30M | SEC |
| 10 | Apr 17, 2025 | Blackrock, Inc. | 13G/A | 6.6% | 2.48M | SEC |
24 more beneficial-ownership filings on Premium
See the full Schedule 13D/13G history for Marketaxess Hldgs Inc.
Unlock full historyTop Institutional Holders (13F)
Largest reported positions · latest quarter
| # | Fund | Shares | Value |
|---|---|---|---|
| 1 | Blackrock, Inc. | 4.08M | $672.32M |
| 2 | Primecap Management Co/Ca/ | 3.35M | $552.21M |
| 3 | Aqr Capital Management LLC | 2.68M | $442.76M |
| 4 | North Reef Capital Management LP | 1.88M | $309.34M |
| 5 | Fmr LLC | 1.52M | $250.67M |
| 6 | State Street Corp | 1.28M | $211.32M |
| 7 | Millennium Management LLC | 1.09M | $179.36M |
| 8 | Bank Of Montreal /Can/ | 1.02M | $168.37M |
| 9 | Neuberger Berman Group LLC | 966.0K | $159.38M |
| 10 | Geode Capital Management, LLC | 863.0K | $142.40M |