CHRISTOPHER R. CONCANNON - 14 Aug 2023 Form 4 Insider Report for MARKETAXESS HOLDINGS INC (MKTX)

Role: Chief Executive Officer, Director
Signature: /s/ Scott Pintoff, as Attorney-in-Fact for Christopher R. Concannon
Issuer symbol: MKTX
Transactions as of: 14 Aug 2023
Net transactions value: +$1,018,060
Form type: 4
Filing time: 15 Aug 2023, 16:15:16 UTC
Previous filing: 05 Apr 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	Purchase	$24,450	+104	+0.24%	$235.10	43,000	14 Aug 2023	Direct	F1
transaction	MKTX	Common Stock, par value $0.003 per share	Purchase	$95,542	+404	+0.94%	$236.49	43,404	14 Aug 2023	Direct	F2
transaction	MKTX	Common Stock, par value $0.003 per share	Purchase	$524,424	+2,203	+5.1%	$238.05	45,607	14 Aug 2023	Direct	F3
transaction	MKTX	Common Stock, par value $0.003 per share	Purchase	$215,334	+900	+2%	$239.26	46,507	14 Aug 2023	Direct	F4
transaction	MKTX	Common Stock, par value $0.003 per share	Purchase	$144,096	+600	+1.3%	$240.16	47,107	14 Aug 2023	Direct	F5
transaction	MKTX	Common Stock, par value $0.003 per share	Purchase	$14,213	+59	+0.13%	$240.90	47,166	14 Aug 2023	Direct

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

Explanation of Responses:

Id	Content
F1	The transactions were executed in multiple trades at prices ranging from $234.52 to $235.12. 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.
F2	The transactions were executed in multiple trades at prices ranging from $236.06 to $236.64. 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.
F3	The transactions were executed in multiple trades at prices ranging from $237.65 to $238.37. 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.
F4	The transactions were executed in multiple trades at prices ranging from $238.72 to $239.62. 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.
F5	The transactions were executed in multiple trades at prices ranging from $239.72 to $240.37. 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.