| Name | Relationship | Address | Signature | Signature date | CIK |
|---|---|---|---|---|---|
| Roupie Christophe Pierre Daniel | Head of EMEA and APAC | C/O MARKETAXESS HOLDINGS INC., 55 HUDSON YARDS, 15TH FLOOR, NEW YORK | /s/ Patrick Wilson, as Attorney-in-Fact for Christophe Pierre Daniel Roupie | 15 May 2025 | 0001701203 |
| Type | Sym | Class | Transaction | Value $ | Shares | Change % | * Price $ | Shares After | Date | Ownership | Footnotes |
|---|---|---|---|---|---|---|---|---|---|---|---|
| transaction | MKTX | Common Stock, par value $0.003 per share | Sale | $250,213 | -1,189 | -13% | $210.44 | 8,208 | 14 May 2025 | Direct |