Valerie Barnett Cytek Biosciences, Inc. (CTKB) insider trading activity

Valerie Barnett is CHIEF LEGAL OFFICER of Cytek Biosciences, Inc.. Currently has a direct ownership of 99,151 shares of CTKB, which is worth approximately $388,671. The most recent transaction as insider was on Aug 18, 2025, when has been sold 8,829 shares (Common Stock) at a price of $4.06 per share, resulting in proceeds of $35,845. This information was disclosed in a Form 4 filing with the Securities and Exchange Commission (SEC).

Shares Held (Direct Ownership) 99.2K

18.5% 3M change

83.9% 12M change

Total Value Held $388,671

Valerie Barnett Transaction History

Date	Transaction	Value	Shares Traded	Shares Held
Aug 18 2025	SELL Payment of exercise price or tax liability	$35,845 $4.06 p/Share	8,829 Reduced 8.18%	99,151 Common Stock
Aug 18 2025	BUY Exercise of conversion of derivative security	-	24,307 Added 19.13%	102,760 Common Stock
May 19 2025	SELL Payment of exercise price or tax liability	$17,686 $2.69 p/Share	6,575 Reduced 7.29%	83,673 Common Stock
May 19 2025	BUY Exercise of conversion of derivative security	-	16,876 Added 16.33%	86,497 Common Stock
Mar 10 2025	SELL Payment of exercise price or tax liability	$25,850 $4.36 p/Share	5,929 Reduced 7.48%	73,372 Common Stock
Mar 10 2025	BUY Exercise of conversion of derivative security	-	15,221 Added 16.44%	77,389 Common Stock
Feb 18 2025	SELL Payment of exercise price or tax liability	$4,173 $5.31 p/Share	786 Reduced 1.21%	64,080 Common Stock
Feb 18 2025	BUY Exercise of conversion of derivative security	-	2,016 Added 3.01%	64,866 Common Stock
Nov 18 2024	SELL Payment of exercise price or tax liability	$27,128 $6.03 p/Share	4,499 Reduced 6.68%	62,850 Common Stock
Nov 18 2024	BUY Exercise of conversion of derivative security	-	13,432 Added 17.03%	65,453 Common Stock
Aug 19 2024	SELL Payment of exercise price or tax liability	$27,904 $5.53 p/Share	5,046 Reduced 8.56%	53,917 Common Stock
Aug 19 2024	BUY Exercise of conversion of derivative security	-	13,432 Added 19.14%	56,743 Common Stock
May 20 2024	SELL Payment of exercise price or tax liability	$22,355 $5.96 p/Share	3,751 Reduced 8.19%	42,044 Common Stock
May 20 2024	BUY Exercise of conversion of derivative security	-	9,626 Added 17.93%	44,053 Common Stock
Mar 11 2024	SELL Payment of exercise price or tax liability	$13,804 $7.22 p/Share	1,912 Reduced 5.02%	36,169 Common Stock
Mar 11 2024	BUY Exercise of conversion of derivative security	-	4,908 Added 11.42%	38,081 Common Stock
Feb 20 2024	SELL Payment of exercise price or tax liability	$6,586 $8.38 p/Share	786 Reduced 2.31%	33,173 Common Stock
Feb 20 2024	BUY Exercise of conversion of derivative security	-	2,016 Added 5.6%	33,959 Common Stock
Nov 18 2023	SELL Payment of exercise price or tax liability	$13,275 $5.98 p/Share	2,220 Reduced 6.5%	31,943 Common Stock
Nov 18 2023	BUY Exercise of conversion of derivative security	-	5,697 Added 14.58%	33,377 Common Stock
Aug 18 2023	SELL Payment of exercise price or tax liability	$18,781 $8.46 p/Share	2,220 Reduced 7.23%	28,466 Common Stock
Aug 18 2023	BUY Exercise of conversion of derivative security	-	5,697 Added 16.0%	29,900 Common Stock
May 18 2023	SELL Payment of exercise price or tax liability	$11,653 $6.69 p/Share	1,742 Reduced 7.02%	23,070 Common Stock
May 18 2023	BUY Exercise of conversion of derivative security	-	4,470 Added 15.69%	24,026 Common Stock
Feb 21 2023	SELL Payment of exercise price or tax liability	$8,622 $10.97 p/Share	786 Reduced 3.72%	20,342 Common Stock

Valerie Barnett

CHIEF LEGAL OFFICER

Fremont, CA

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