Valerie Barnett

Date	Company	Security	Transaction	Code	Indirect	10b5-1	$Price	#Shares	$Value	#Remaining
4 Mar 25	CTKB Cytek Biosciences	RSU Common Stock	Grant	Acquire A	No	No	0	174,013	0.00	174,013
4 Mar 25	CTKB Cytek Biosciences	Employee Stock Option Common Stock	Grant	Acquire A	No	No	4.31	275,735	1.19 mm	275,735
18 Feb 25	CTKB Cytek Biosciences	Common Stock	Payment of exercise	Dispose F	No	No	5.31	786	4.17 k	64,080
18 Feb 25	CTKB Cytek Biosciences	Common Stock	Option exercise	Acquire M	No	No	0	2,016	0.00	64,866
18 Feb 25	CTKB Cytek Biosciences	RSU Common Stock	Option exercise	Dispose M	No	No	0	2,016	0.00	7,394
18 Nov 24	CTKB Cytek Biosciences	Common Stock	Payment of exercise	Dispose F	No	No	6.03	2,603	15.70 k	62,850
18 Nov 24	CTKB Cytek Biosciences	Common Stock	Option exercise	Acquire M	No	No	0	7,735	0.00	65,453
18 Nov 24	CTKB Cytek Biosciences	Common Stock	Payment of exercise	Dispose F	No	No	6.03	1,235	7.45 k	57,718
18 Nov 24	CTKB Cytek Biosciences	Common Stock	Option exercise	Acquire M	No	No	0	3,681	0.00	58,953
18 Nov 24	CTKB Cytek Biosciences	Common Stock	Payment of exercise	Dispose F	No	No	6.03	661	3.99 k	55,272

Data from 3, 4 and 5 filings. Values as filed, not updated for current price.