Insider · CIK 0001991396

Busque Philippe

Reports to the SEC for 1 company · FREMONT, CA

sec.gov

Transactions

Companies

Filings

CIK

0001991396

Forms 4 and 5

Insider transactions

50 trades

Date	Company	Role	Code	Shares	Price	Value	Shares after
2026-05-18	CTKBCytek Biosciences, Inc.M Exercise/Conversion	SVP, GLOBAL SALES AND SERVICES	MExercise/Conversion	+1,024 sh	—	—	36,711
2026-05-18	CTKBCytek Biosciences, Inc. · Restricted Stock UnitsM Exercise/Conversion	SVP, GLOBAL SALES AND SERVICES	MExercise/Conversion	−5,551 sh	—	—	127,675
2026-05-18	CTKBCytek Biosciences, Inc. · Restricted Stock UnitsM Exercise/Conversion	SVP, GLOBAL SALES AND SERVICES	MExercise/Conversion	−2,416 sh	—	—	41,089
2026-05-18	CTKBCytek Biosciences, Inc. · Restricted Stock UnitsM Exercise/Conversion	SVP, GLOBAL SALES AND SERVICES	MExercise/Conversion	−1,473 sh	—	—	16,209
2026-05-18	CTKBCytek Biosciences, Inc. · Restricted Stock UnitsM Exercise/Conversion	SVP, GLOBAL SALES AND SERVICES	MExercise/Conversion	−1,024 sh	—	—	5,641
2026-05-18	CTKBCytek Biosciences, Inc.F Tax Payment	SVP, GLOBAL SALES AND SERVICES	FTax Payment	−1,424 sh	$3.55	−$5,055.2	43,466
2026-05-18	CTKBCytek Biosciences, Inc.M Exercise/Conversion	SVP, GLOBAL SALES AND SERVICES	MExercise/Conversion	+5,551 sh	—	—	44,890
2026-05-18	CTKBCytek Biosciences, Inc.F Tax Payment	SVP, GLOBAL SALES AND SERVICES	FTax Payment	−620 sh	$3.55	−$2,201	39,339
2026-05-18	CTKBCytek Biosciences, Inc.M Exercise/Conversion	SVP, GLOBAL SALES AND SERVICES	MExercise/Conversion	+2,416 sh	—	—	39,959
2026-05-18	CTKBCytek Biosciences, Inc.F Tax Payment	SVP, GLOBAL SALES AND SERVICES	FTax Payment	−378 sh	$3.55	−$1,341.9	37,543
2026-05-18	CTKBCytek Biosciences, Inc.M Exercise/Conversion	SVP, GLOBAL SALES AND SERVICES	MExercise/Conversion	+1,473 sh	—	—	37,921
2026-05-18	CTKBCytek Biosciences, Inc.F Tax Payment	SVP, GLOBAL SALES AND SERVICES	FTax Payment	−263 sh	$3.55	−$933.65	36,448
2026-03-10	CTKBCytek Biosciences, Inc.F Tax Payment	SVP, GLOBAL SALES AND SERVICES	FTax Payment	−635 sh	$4.23	−$2,686.05	30,316
2026-03-10	CTKBCytek Biosciences, Inc. · Restricted Stock UnitsM Exercise/Conversion	SVP, GLOBAL SALES AND SERVICES	MExercise/Conversion	−4,833 sh	—	—	43,505
2026-03-10	CTKBCytek Biosciences, Inc. · Restricted Stock UnitsM Exercise/Conversion	SVP, GLOBAL SALES AND SERVICES	MExercise/Conversion	−2,946 sh	—	—	17,682
2026-03-10	CTKBCytek Biosciences, Inc. · Restricted Stock UnitsM Exercise/Conversion	SVP, GLOBAL SALES AND SERVICES	MExercise/Conversion	−2,049 sh	—	—	6,665
2026-03-10	CTKBCytek Biosciences, Inc. · Restricted Stock UnitsA Award	SVP, GLOBAL SALES AND SERVICES	AAward	+133K sh	—	—	133,226
2026-03-10	CTKBCytek Biosciences, Inc. · Employee Stock Option (right to buy)A Award	SVP, GLOBAL SALES AND SERVICES	AAward	+70.7K sh	—	—	70,665
2026-03-10	CTKBCytek Biosciences, Inc.F Tax Payment	SVP, GLOBAL SALES AND SERVICES	FTax Payment	−1,496 sh	$4.23	−$6,328.08	35,687
2026-03-10	CTKBCytek Biosciences, Inc.M Exercise/Conversion	SVP, GLOBAL SALES AND SERVICES	MExercise/Conversion	+4,833 sh	—	—	37,183
2026-03-10	CTKBCytek Biosciences, Inc.F Tax Payment	SVP, GLOBAL SALES AND SERVICES	FTax Payment	−912 sh	$4.23	−$3,857.76	32,350
2026-03-10	CTKBCytek Biosciences, Inc.M Exercise/Conversion	SVP, GLOBAL SALES AND SERVICES	MExercise/Conversion	+2,946 sh	—	—	33,262
2026-03-10	CTKBCytek Biosciences, Inc.M Exercise/Conversion	SVP, GLOBAL SALES AND SERVICES	MExercise/Conversion	+2,049 sh	—	—	30,951
2025-11-18	CTKBCytek Biosciences, Inc. · Restricted Stock UnitsM Exercise/Conversion	SVP, GLOBAL SALES AND SERVICES	MExercise/Conversion	−1,536 sh	—	—	8,714
2025-11-18	CTKBCytek Biosciences, Inc. · Restricted Stock UnitsM Exercise/Conversion	SVP, GLOBAL SALES AND SERVICES	MExercise/Conversion	−2,210 sh	—	—	20,628
2025-11-18	CTKBCytek Biosciences, Inc. · Restricted Stock UnitsM Exercise/Conversion	SVP, GLOBAL SALES AND SERVICES	MExercise/Conversion	−3,625 sh	—	—	48,338
2025-11-18	CTKBCytek Biosciences, Inc.M Exercise/Conversion	SVP, GLOBAL SALES AND SERVICES	MExercise/Conversion	+1,536 sh	—	—	24,952
2025-11-18	CTKBCytek Biosciences, Inc.F Tax Payment	SVP, GLOBAL SALES AND SERVICES	FTax Payment	−393 sh	$5.53	−$2,173.29	24,559
2025-11-18	CTKBCytek Biosciences, Inc.M Exercise/Conversion	SVP, GLOBAL SALES AND SERVICES	MExercise/Conversion	+2,210 sh	—	—	26,769
2025-11-18	CTKBCytek Biosciences, Inc.F Tax Payment	SVP, GLOBAL SALES AND SERVICES	FTax Payment	−565 sh	$5.53	−$3,124.45	26,204
2025-11-18	CTKBCytek Biosciences, Inc.M Exercise/Conversion	SVP, GLOBAL SALES AND SERVICES	MExercise/Conversion	+3,625 sh	—	—	29,829
2025-11-18	CTKBCytek Biosciences, Inc.F Tax Payment	SVP, GLOBAL SALES AND SERVICES	FTax Payment	−927 sh	$5.53	−$5,126.31	28,902
2025-08-18	CTKBCytek Biosciences, Inc.F Tax Payment	SVP, GLOBAL SALES AND SERVICES	FTax Payment	−1,412 sh	$4.06	−$5,732.72	23,416
2025-08-18	CTKBCytek Biosciences, Inc.M Exercise/Conversion	SVP, GLOBAL SALES AND SERVICES	MExercise/Conversion	+1,536 sh	—	—	20,453
2025-08-18	CTKBCytek Biosciences, Inc.F Tax Payment	SVP, GLOBAL SALES AND SERVICES	FTax Payment	−599 sh	$4.06	−$2,431.94	19,854
2025-08-18	CTKBCytek Biosciences, Inc.M Exercise/Conversion	SVP, GLOBAL SALES AND SERVICES	MExercise/Conversion	+2,210 sh	—	—	22,064
2025-08-18	CTKBCytek Biosciences, Inc.F Tax Payment	SVP, GLOBAL SALES AND SERVICES	FTax Payment	−861 sh	$4.06	−$3,495.66	21,203
2025-08-18	CTKBCytek Biosciences, Inc.M Exercise/Conversion	SVP, GLOBAL SALES AND SERVICES	MExercise/Conversion	+3,625 sh	—	—	24,828
2025-08-18	CTKBCytek Biosciences, Inc. · Restricted Stock UnitsM Exercise/Conversion	SVP, GLOBAL SALES AND SERVICES	MExercise/Conversion	−1,536 sh	—	—	10,250
2025-08-18	CTKBCytek Biosciences, Inc. · Restricted Stock UnitsM Exercise/Conversion	SVP, GLOBAL SALES AND SERVICES	MExercise/Conversion	−2,210 sh	—	—	22,838
2025-08-18	CTKBCytek Biosciences, Inc. · Restricted Stock UnitsM Exercise/Conversion	SVP, GLOBAL SALES AND SERVICES	MExercise/Conversion	−3,625 sh	—	—	51,963
2025-05-19	CTKBCytek Biosciences, Inc. · Restricted Stock UnitsM Exercise/Conversion	SVP, GLOBAL SALES AND SERVICES	MExercise/Conversion	−2,416 sh	—	—	55,588
2025-05-19	CTKBCytek Biosciences, Inc. · Restricted Stock UnitsM Exercise/Conversion	SVP, GLOBAL SALES AND SERVICES	MExercise/Conversion	−1,024 sh	—	—	11,786
2025-05-19	CTKBCytek Biosciences, Inc.F Tax Payment	SVP, GLOBAL SALES AND SERVICES	FTax Payment	−942 sh	$2.69	−$2,533.98	18,917
2025-05-19	CTKBCytek Biosciences, Inc.M Exercise/Conversion	SVP, GLOBAL SALES AND SERVICES	MExercise/Conversion	+2,416 sh	—	—	19,859
2025-05-19	CTKBCytek Biosciences, Inc.F Tax Payment	SVP, GLOBAL SALES AND SERVICES	FTax Payment	−574 sh	$2.69	−$1,544.06	17,443
2025-05-19	CTKBCytek Biosciences, Inc.M Exercise/Conversion	SVP, GLOBAL SALES AND SERVICES	MExercise/Conversion	+1,473 sh	—	—	18,017
2025-05-19	CTKBCytek Biosciences, Inc.F Tax Payment	SVP, GLOBAL SALES AND SERVICES	FTax Payment	−399 sh	$2.69	−$1,073.31	16,544
2025-05-19	CTKBCytek Biosciences, Inc.M Exercise/Conversion	SVP, GLOBAL SALES AND SERVICES	MExercise/Conversion	+1,024 sh	—	—	16,943
2025-05-19	CTKBCytek Biosciences, Inc. · Restricted Stock UnitsM Exercise/Conversion	SVP, GLOBAL SALES AND SERVICES	MExercise/Conversion	−1,473 sh	—	—	25,048

Recent filings

Accepted (ET)
May 204
Busque Philippe0001991396-26-000002
SEC(opens sec.gov)
Mar 124
Busque Philippe0001991396-26-000001
SEC(opens sec.gov)

Companies

Cytek Biosciences, Inc.SVP, GLOBAL SALES AND SERVICESCTKB

Address

C/O CYTEK BIOSCIENCES, INC. 47215 LAKEVIEW BLVD.

FREMONT, CA, 94538