Valerie Barnett - May 18, 2022 Form 4 Insider Report for Cytek Biosciences, Inc. (CTKB)

Role: General Counsel
Signature: /s/ Valerie Barnett
Stock symbol: CTKB
Transactions as of: May 18, 2022
Transactions value $: -$10,104
Form type: 4
Date filed: 5/20/2022, 07:09 PM
Previous filing: Mar 8, 2022
Next filing: Aug 19, 2022

Transactions Table

Type	Sym	Class	Transaction	Value $	Shares	Change %	* Price $	Shares After	Date	Ownership	Footnotes
transaction	CTKB	Common Stock	Options Exercise		+2.69K	+21.68%		15.1K	May 18, 2022	Direct	F1
transaction	CTKB	Common Stock	Tax liability	-$10.1K	-1.05K	-6.94%	$9.65	14K	May 18, 2022	Direct	F2

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	CTKB	Restricted Stock Units	Options Exercise	$0	-2.69K	-8.33%	$0.00	29.6K	May 18, 2022	Common Stock	2.69K		Direct	F1, F3

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

Explanation of Responses:

Id	Content
F1	Each Restricted Stock Unit (the "RSU Award") represents a contingent right to receive one share of the Issuer's common stock.
F2	Represents the number of shares withheld by and surrendered to the Issuer on May 18, 2022, to satisfy tax withholding obligations that arose in connection with the vesting of the RSU Award.
F3	The shares subject to the RSU Award shall vest quarterly over four years, with 4/48th of the total shares underlying the RSU Award vesting on May 18, 2022 and 3/48th of the total shares underlying the RSU Award vesting each subsequent quarter thereafter on August 18, November 18, February 18 and May 18.