| Name | Relationship | Address | Signature | Signature date | CIK |
|---|---|---|---|---|---|
| McPherson Kevin M | Chief Revenue Officer | C/O MARKETAXESS HOLDINGS INC., 55 HUDSON YARDS, 15TH FLOOR, NEW YORK | /s/ Patrick Wilson, as Attorney-in-Fact for Kevin M. McPherson | 15 Sep 2025 | 0001704380 |
| Type | Sym | Class | Transaction | Value $ | Shares | Change % | * Price $ | Shares After | Date | Ownership | Footnotes |
|---|---|---|---|---|---|---|---|---|---|---|---|
| transaction | MKTX | Common Stock, par value $0.003 per share | Sale | $276,868 | -1,494 | -2.2% | $185.32 | 67,681 | 12 Sep 2025 | Direct | F1 |
| Id | Content |
|---|---|
| F1 | The transactions were executed in multiple trades at prices ranging from $185.00 to $185.61. The price above reflects the weighted average sales price. Detailed information regarding the number of shares sold at each separate price will be provided upon request by the Commission staff, the Issuer or a security holder of the Issuer. |