Insider · CIK 0001872873

Jiang Wenbin

Reports to the SEC for 1 company · FREMONT, CA

sec.gov

Transactions

Companies

Filings

CIK

0001872873

Forms 4 and 5

Insider transactions

50 trades

Date	Company	Role	Code	Shares	Price	Value	Shares after
2026-08-18	CTKBCytek Biosciences, Inc.M Exercise/Conversion	Director, PRESIDENT AND CEO	MExercise/Conversion	+11.8K sh	—	—	5,488,984
2026-08-18	CTKBCytek Biosciences, Inc.F Tax Payment	Director, PRESIDENT AND CEO	FTax Payment	−2,869 sh	$4.67	−$13.4K	5,486,115
2026-08-18	CTKBCytek Biosciences, Inc.M Exercise/Conversion	Director, PRESIDENT AND CEO	MExercise/Conversion	+22.1K sh	—	—	5,508,215
2026-08-18	CTKBCytek Biosciences, Inc.F Tax Payment	Director, PRESIDENT AND CEO	FTax Payment	−5,382 sh	$4.67	−$25.1K	5,502,833
2026-08-18	CTKBCytek Biosciences, Inc.M Exercise/Conversion	Director, PRESIDENT AND CEO	MExercise/Conversion	+29K sh	—	—	5,531,835
2026-08-18	CTKBCytek Biosciences, Inc.F Tax Payment	Director, PRESIDENT AND CEO	FTax Payment	−7,062 sh	$4.67	−$33K	5,524,773
2026-08-18	CTKBCytek Biosciences, Inc.M Exercise/Conversion	Director, PRESIDENT AND CEO	MExercise/Conversion	+57.2K sh	—	—	5,581,985
2026-08-18	CTKBCytek Biosciences, Inc.F Tax Payment	Director, PRESIDENT AND CEO	FTax Payment	−21K sh	$4.67	−$97.9K	5,561,029
2026-08-18	CTKBCytek Biosciences, Inc. · Restricted Stock UnitsM Exercise/Conversion	Director, PRESIDENT AND CEO	MExercise/Conversion	−11.8K sh	—	—	27,494
2026-08-18	CTKBCytek Biosciences, Inc. · Restricted Stock UnitsM Exercise/Conversion	Director, PRESIDENT AND CEO	MExercise/Conversion	−22.1K sh	—	—	139,973
2026-08-18	CTKBCytek Biosciences, Inc. · Restricted Stock UnitsM Exercise/Conversion	Director, PRESIDENT AND CEO	MExercise/Conversion	−29K sh	—	—	299,694
2026-08-18	CTKBCytek Biosciences, Inc. · Restricted Stock UnitsM Exercise/Conversion	Director, PRESIDENT AND CEO	MExercise/Conversion	−57.2K sh	—	—	820,054
2026-05-18	CTKBCytek Biosciences, Inc.M Exercise/Conversion	Director, PRESIDENT AND CEO	MExercise/Conversion	+7,854 sh	—	—	5,430,537
2026-05-18	CTKBCytek Biosciences, Inc.F Tax Payment	Director, PRESIDENT AND CEO	FTax Payment	−1,913 sh	$3.55	−$6,791.15	5,428,624
2026-05-18	CTKBCytek Biosciences, Inc.M Exercise/Conversion	Director, PRESIDENT AND CEO	MExercise/Conversion	+14.7K sh	—	—	5,443,357
2026-05-18	CTKBCytek Biosciences, Inc.F Tax Payment	Director, PRESIDENT AND CEO	FTax Payment	−3,588 sh	$3.55	−$12.7K	5,439,769
2026-05-18	CTKBCytek Biosciences, Inc.M Exercise/Conversion	Director, PRESIDENT AND CEO	MExercise/Conversion	+19.3K sh	—	—	5,459,103
2026-05-18	CTKBCytek Biosciences, Inc.F Tax Payment	Director, PRESIDENT AND CEO	FTax Payment	−5,032 sh	$3.55	−$17.9K	5,454,071
2026-05-18	CTKBCytek Biosciences, Inc.M Exercise/Conversion	Director, PRESIDENT AND CEO	MExercise/Conversion	+38.1K sh	—	—	5,492,212
2026-05-18	CTKBCytek Biosciences, Inc.F Tax Payment	Director, PRESIDENT AND CEO	FTax Payment	−15K sh	$3.55	−$53.3K	5,477,203
2026-05-18	CTKBCytek Biosciences, Inc. · Restricted Stock UnitsM Exercise/Conversion	Director, PRESIDENT AND CEO	MExercise/Conversion	−7,854 sh	—	—	39,275
2026-05-18	CTKBCytek Biosciences, Inc. · Restricted Stock UnitsM Exercise/Conversion	Director, PRESIDENT AND CEO	MExercise/Conversion	−14.7K sh	—	—	162,073
2026-05-18	CTKBCytek Biosciences, Inc. · Restricted Stock UnitsM Exercise/Conversion	Director, PRESIDENT AND CEO	MExercise/Conversion	−19.3K sh	—	—	328,696
2026-05-18	CTKBCytek Biosciences, Inc. · Restricted Stock UnitsM Exercise/Conversion	Director, PRESIDENT AND CEO	MExercise/Conversion	−38.1K sh	—	—	877,266
2026-03-10	CTKBCytek Biosciences, Inc.M Exercise/Conversion	Director, PRESIDENT AND CEO	MExercise/Conversion	+15.7K sh	—	—	5,375,535
2026-03-10	CTKBCytek Biosciences, Inc.F Tax Payment	Director, PRESIDENT AND CEO	FTax Payment	−3,825 sh	$4.23	−$16.2K	5,371,710
2026-03-10	CTKBCytek Biosciences, Inc.M Exercise/Conversion	Director, PRESIDENT AND CEO	MExercise/Conversion	+29.5K sh	—	—	5,401,177
2026-03-10	CTKBCytek Biosciences, Inc.F Tax Payment	Director, PRESIDENT AND CEO	FTax Payment	−7,747 sh	$4.23	−$32.8K	5,393,430
2026-03-10	CTKBCytek Biosciences, Inc.M Exercise/Conversion	Director, PRESIDENT AND CEO	MExercise/Conversion	+38.7K sh	—	—	5,432,099
2026-03-10	CTKBCytek Biosciences, Inc.F Tax Payment	Director, PRESIDENT AND CEO	FTax Payment	−9,416 sh	$4.23	−$39.8K	5,422,683
2026-03-10	CTKBCytek Biosciences, Inc. · Employee Stock Option (right to buy)A Award	Director, PRESIDENT AND CEO	AAward	+486K sh	—	—	485,545
2026-03-10	CTKBCytek Biosciences, Inc. · Restricted Stock UnitsA Award	Director, PRESIDENT AND CEO	AAward	+915K sh	—	—	915,407
2026-03-10	CTKBCytek Biosciences, Inc. · Restricted Stock UnitsM Exercise/Conversion	Director, PRESIDENT AND CEO	MExercise/Conversion	−15.7K sh	—	—	47,129
2026-03-10	CTKBCytek Biosciences, Inc. · Restricted Stock UnitsM Exercise/Conversion	Director, PRESIDENT AND CEO	MExercise/Conversion	−29.5K sh	—	—	176,806
2026-03-10	CTKBCytek Biosciences, Inc. · Restricted Stock UnitsM Exercise/Conversion	Director, PRESIDENT AND CEO	MExercise/Conversion	−38.7K sh	—	—	348,030
2026-02-18	CTKBCytek Biosciences, Inc.M Exercise/Conversion	Director, PRESIDENT AND CEO	MExercise/Conversion	+4,514 sh	—	—	5,361,166
2026-02-18	CTKBCytek Biosciences, Inc.F Tax Payment	Director, PRESIDENT AND CEO	FTax Payment	−1,339 sh	$4.20	−$5,623.8	5,359,827
2026-02-18	CTKBCytek Biosciences, Inc. · Restricted Stock UnitsM Exercise/Conversion	Director, PRESIDENT AND CEO	MExercise/Conversion	−4,514 sh	—	—	0
2025-11-18	CTKBCytek Biosciences, Inc.M Exercise/Conversion	Director, PRESIDENT AND CEO	MExercise/Conversion	+6,758 sh	—	—	5,321,175
2025-11-18	CTKBCytek Biosciences, Inc.F Tax Payment	Director, PRESIDENT AND CEO	FTax Payment	−2,660 sh	$5.53	−$14.7K	5,318,515
2025-11-18	CTKBCytek Biosciences, Inc.M Exercise/Conversion	Director, PRESIDENT AND CEO	MExercise/Conversion	+11.8K sh	—	—	5,330,296
2025-11-18	CTKBCytek Biosciences, Inc.F Tax Payment	Director, PRESIDENT AND CEO	FTax Payment	−4,636 sh	$5.53	−$25.6K	5,325,660
2025-11-18	CTKBCytek Biosciences, Inc.M Exercise/Conversion	Director, PRESIDENT AND CEO	MExercise/Conversion	+22.1K sh	—	—	5,347,760
2025-11-18	CTKBCytek Biosciences, Inc.F Tax Payment	Director, PRESIDENT AND CEO	FTax Payment	−8,697 sh	$5.53	−$48.1K	5,339,063
2025-11-18	CTKBCytek Biosciences, Inc.M Exercise/Conversion	Director, PRESIDENT AND CEO	MExercise/Conversion	+29K sh	—	—	5,368,065
2025-11-18	CTKBCytek Biosciences, Inc.F Tax Payment	Director, PRESIDENT AND CEO	FTax Payment	−11.4K sh	$5.53	−$63.1K	5,356,652
2025-11-18	CTKBCytek Biosciences, Inc. · Restricted Stock UnitsM Exercise/Conversion	Director, PRESIDENT AND CEO	MExercise/Conversion	−6,758 sh	—	—	4,514
2025-11-18	CTKBCytek Biosciences, Inc. · Restricted Stock UnitsM Exercise/Conversion	Director, PRESIDENT AND CEO	MExercise/Conversion	−11.8K sh	—	—	62,837
2025-11-18	CTKBCytek Biosciences, Inc. · Restricted Stock UnitsM Exercise/Conversion	Director, PRESIDENT AND CEO	MExercise/Conversion	−22.1K sh	—	—	206,273
2025-11-18	CTKBCytek Biosciences, Inc. · Restricted Stock UnitsM Exercise/Conversion	Director, PRESIDENT AND CEO	MExercise/Conversion	−29K sh	—	—	386,699

Recent filings

Accepted (ET)
Aug 204
Jiang Wenbin0001872873-26-000006
SEC(opens sec.gov)
May 204
Jiang Wenbin0001872873-26-000004
SEC(opens sec.gov)

Companies

Cytek Biosciences, Inc.Director, PRESIDENT AND CEOCTKB

Address

C/O CYTEK BIOSCIENCES, INC. 47215 LAKEVIEW BOULEVARD

FREMONT, CA, 94538