MARKETAXESS HOLDINGS INC - MKTX
Ownership (Schedule 13D / 13G) · latest 50 filings
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| Filed | Form | Reporting person | Percent | Shares | SEC |
|---|---|---|---|---|---|
| Mar 27, 2026 | SCHEDULE 13G/A | The Vanguard Group | 0.0% | 0 | View |
| Feb 13, 2026 | SCHEDULE 13G | AQR Capital Management, LLC | 6.88% | 2,558,097 | View |
| Feb 13, 2026 | SCHEDULE 13G | AQR Capital Management Holdings, LLC | 6.88% | 2,558,097 | View |
| Feb 11, 2026 | SCHEDULE 13G/A | PRIMECAP MANAGEMENT CO/CA/ | 8.54% | 3,175,425 | View |
| Feb 06, 2026 | SCHEDULE 13G/A | BlackRock, Inc. | 10.9% | 4,034,537 | View |
| Jan 21, 2026 | SCHEDULE 13G | BlackRock, Inc. | 9.9% | 3,680,645 | View |
| Nov 14, 2025 | SCHEDULE 13G/A | T. Rowe Price Investment Management, Inc. | 3.7% | 1,370,694 | View |
| Nov 13, 2025 | SCHEDULE 13G | PRIMECAP MANAGEMENT CO/CA/ | 5.97% | 2,230,595 | View |
| Oct 31, 2025 | SCHEDULE 13G/A | The Vanguard Group | 10.31% | 3,854,312 | View |
| Oct 17, 2025 | SCHEDULE 13G/A | BlackRock, Inc. | 4.2% | 1,572,513 | View |
Percent = "% of class represented by amount beneficially owned" for this reporting person in the filed 13D/13G.
Shares = reported beneficial ownership amount for the same row (not portfolio shares from 13F).
Amendments (/A) can repeat the same holder over time, so rows should not be summed.
Extraction is best-effort from filing text and can be missing or noisy; verify exact figures via the SEC link in each row.