CHRISTOPHER R. CONCANNON - 22 Jan 2024 Form 4 Insider Report for MARKETAXESS HOLDINGS INC (MKTX)

Role: Chief Executive Officer, Director
Signature: /s/ Jason Edelstein, as Attorney-in-Fact for Christopher R. Concannon
Issuer symbol: MKTX
Transactions as of: 22 Jan 2024
Net transactions value: -$2,425,016
Form type: 4
Filing time: 23 Jan 2024, 16:45:04 UTC
Previous filing: 17 Jan 2024
Next filing: 02 Feb 2024
SEC: View on sec.gov

Transactions Table

Type	Sym	Class	Transaction	Value $	Shares	Change %	* Price $	Shares After	Date	Ownership	Footnotes
transaction	MKTX	Common Stock, par value $0.003 per share	Tax liability	$1,350,127	-5,077	-11%	$265.93	42,988	22 Jan 2024	Direct	F1
transaction	MKTX	Common Stock, par value $0.003 per share	Tax liability	$1,074,889	-4,042	-9.4%	$265.93	38,946	22 Jan 2024	Direct	F1

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

Explanation of Responses:

Id	Content
F1	Represents the surrender of shares to the Company to satisfy the Reporting Person's tax withholding obligation upon the vesting of shares of restricted stock previously granted to the Reporting Person.