Philippe Busque

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	58,004	0.00	58,004
4 Mar 25	CTKB Cytek Biosciences	Employee Stock Option Common Stock	Grant	Acquire A	No	No	4.31	91,911	396.14 k	91,911
18 Nov 24	CTKB Cytek Biosciences	Common Stock	Payment of exercise	Dispose F	No	No	6.03	861	5.19 k	12,871
18 Nov 24	CTKB Cytek Biosciences	Common Stock	Option exercise	Acquire M	No	No	0	2,210	0.00	13,732
18 Nov 24	CTKB Cytek Biosciences	Common Stock	Payment of exercise	Dispose F	No	No	6.03	599	3.61 k	11,522
18 Nov 24	CTKB Cytek Biosciences	Common Stock	Option exercise	Acquire M	No	No	0	1,536	0.00	12,121
18 Nov 24	CTKB Cytek Biosciences	RSU Common Stock	Option exercise	Dispose M	No	No	0	2,210	0.00	29,467
18 Nov 24	CTKB Cytek Biosciences	RSU Common Stock	Option exercise	Dispose M	No	No	0	1,536	0.00	14,859
19 Aug 24	CTKB Cytek Biosciences	Common Stock	Payment of exercise	Dispose F	No	No	5.53	861	4.76 k	10,585
19 Aug 24	CTKB Cytek Biosciences	Common Stock	Option exercise	Acquire M	No	No	0	2,210	0.00	11,446

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