Nicholas Themelis - Mar 7, 2022 Form 4 Insider Report for MARKETAXESS HOLDINGS INC (MKTX)

Role: Chief Information Officer
Signature: /s/ Jason Edelstein, as Attorney-in-Fact for Nicholas Themelis
Stock symbol: MKTX
Transactions as of: Mar 7, 2022
Transactions value $: -$729,777
Form type: 4
Date filed: 3/9/2022, 03:15 PM
Previous filing: Feb 2, 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	Sale	-$152K	-424	-4.02%	$358.18	10.1K	Mar 7, 2022	Direct	F1, F2
transaction	MKTX	Common Stock, par value $0.003 per share	Sale	-$35.2K	-98	-0.97%	$359.18	10K	Mar 7, 2022	Direct	F1, F3
transaction	MKTX	Common Stock, par value $0.003 per share	Sale	-$39.4K	-109	-1.09%	$361.01	9.91K	Mar 7, 2022	Direct	F1, F4
transaction	MKTX	Common Stock, par value $0.003 per share	Sale	-$76.7K	-212	-2.14%	$361.91	9.7K	Mar 7, 2022	Direct	F1, F5
transaction	MKTX	Common Stock, par value $0.003 per share	Sale	-$2.92K	-8	-0.08%	$365.16	9.69K	Mar 7, 2022	Direct	F1, F6
transaction	MKTX	Common Stock, par value $0.003 per share	Sale	-$73.3K	-200	-2.06%	$366.39	9.49K	Mar 7, 2022	Direct	F1, F7
transaction	MKTX	Common Stock, par value $0.003 per share	Sale	-$116K	-315	-3.32%	$367.42	9.18K	Mar 7, 2022	Direct	F1, F8
transaction	MKTX	Common Stock, par value $0.003 per share	Sale	-$63.1K	-171	-1.86%	$368.87	9.01K	Mar 7, 2022	Direct	F1, F9
transaction	MKTX	Common Stock, par value $0.003 per share	Sale	-$120K	-325	-3.61%	$370.37	8.68K	Mar 7, 2022	Direct	F1, F10
transaction	MKTX	Common Stock, par value $0.003 per share	Sale	-$51.3K	-138	-1.59%	$371.38	8.54K	Mar 7, 2022	Direct	F1, F11

Showing 1 to 10 of 10 entries

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

Explanation of Responses:

Id	Content
F1	This transaction was effected pursuant to a Rule 10b5-1 trading plan adopted by the reporting person.
F2	The transactions were executed in multiple trades at prices ranging from $357.90 to $358.70. 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 $358.98 to $359.47. 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 $360.74 to $361.21. 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 $361.84 to $362.04. 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.
F6	The transactions were executed in multiple trades at prices ranging from $365.05 to $365.18. 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.
F7	The transactions were executed in multiple trades at prices ranging from $366.15 to $366.63. 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.
F8	The transactions were executed in multiple trades at prices ranging from $367.27 to $367.79. 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.
F9	The transactions were executed in multiple trades at prices ranging from $368.45 to $369.29. 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.
F10	The transactions were executed in multiple trades at prices ranging from $369.94 to $370.72. 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.
F11	The transactions were executed in multiple trades at prices ranging from $371.03 to $371.57. 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.