Michael R. Cianciulli - Feb 1, 2024 Form 3 Insider Report for MARKETAXESS HOLDINGS INC (MKTX)

Role: Head of External Reporting
Signature: /s/ Jason Edelstein, as Attorney-in-Fact for Michael R. Cianciulli
Stock symbol: MKTX
Transactions as of: Feb 1, 2024
Transactions value $: $0
Form type: 3
Date filed: 2/7/2024, 04:15 PM
Next filing: Feb 16, 2024

Transactions Table

Type	Sym	Class	Transaction	Value $	Shares	Change %	* Price $	Shares After	Date	Ownership	Footnotes
holding	MKTX	Common Stock, par value $0.003 per share						132	Feb 1, 2024	Direct

* An asterisk sign (*) next to the price indicates that the price is likely invalid.

Exhibit 24-Power of Attorney