Richard M. McVey - 10 Jan 2024 Form 4 Insider Report for MARKETAXESS HOLDINGS INC (MKTX)

Role: Executive Chairman, Director
Signature: /s/ Jason Edelstein, as Attorney-in-Fact for Richard M. McVey
Issuer symbol: MKTX
Transactions as of: 10 Jan 2024
Net transactions value: +$1,532,542
Form type: 4
Filing time: 12 Jan 2024, 16:15:07 UTC
Previous filing: 09 Nov 2023
Next filing: 17 Jan 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	Options Exercise	$3,267,058	+16,037	+2.5%	$203.72	652,382	10 Jan 2024	Direct
transaction	MKTX	Common Stock, par value $0.003 per share	Tax liability	$1,734,516	-6,368	-0.98%	$272.38	646,014	10 Jan 2024	Direct
holding	MKTX	Common Stock, par value $0.003 per share						2,000	10 Jan 2024	By Immediate Family Members

Derivative Securities (e.g., puts, calls, warrants, options, convertible securities)

Type	Sym	Class	Transaction	Value $	Shares	Change %	* Price $	Shares After	Date	Underlying Class	Amount	Exercise Price	Ownership	Footnotes
transaction	MKTX	Stock Option (right to buy)	Options Exercise	$0	-16,037	-100%	$0.000000^*	0	10 Jan 2024	Common Stock, par value $0.003 per share	16,037	$203.72	Direct	F1

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

Explanation of Responses:

Id	Content
F1	The stock options were fully exercisable.