CHRISTOPHER R. CONCANNON - 22 Jan 2022 Form 4 Insider Report for MARKETAXESS HOLDINGS INC (MKTX)

Role: President & COO, Director
Signature: /s/ Jason Edelstein, as Attorney-in-Fact for Christopher R. Concannon
Issuer symbol: MKTX
Transactions as of: 22 Jan 2022
Net transactions value: -$2,301,594
Form type: 4
Filing time: 24 Jan 2022, 15:15:14 UTC
Next filing: 02 Feb 2022
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	$1,433,164	-3,931	-9.1%	$364.58	39,045	22 Jan 2022	Direct	F1
transaction	MKTX	Common Stock, par value $0.003 per share	Tax liability	$868,430	-2,382	-6.1%	$364.58	36,663	22 Jan 2022	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 Mr. Concannon's tax withholding obligation upon the vesting of restricted stock units previously granted to Mr. Concannon.