Insider · CIK 0001874041

Yan Ming

Reports to the SEC for 1 company · FREMONT, CA

sec.gov

Transactions

Companies

Filings

CIK

0001874041

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, CHIEF TECHNOLOGY OFFICER	MExercise/Conversion	+7,363 sh	—	—	4,804,051
2026-08-18	CTKBCytek Biosciences, Inc.F Tax Payment	Director, CHIEF TECHNOLOGY OFFICER	FTax Payment	−1,778 sh	$4.67	−$8,303.26	4,802,273
2026-08-18	CTKBCytek Biosciences, Inc.M Exercise/Conversion	Director, CHIEF TECHNOLOGY OFFICER	MExercise/Conversion	+5,525 sh	—	—	4,807,798
2026-08-18	CTKBCytek Biosciences, Inc.F Tax Payment	Director, CHIEF TECHNOLOGY OFFICER	FTax Payment	−1,346 sh	$4.67	−$6,285.82	4,806,452
2026-08-18	CTKBCytek Biosciences, Inc.M Exercise/Conversion	Director, CHIEF TECHNOLOGY OFFICER	MExercise/Conversion	+6,162 sh	—	—	4,812,614
2026-08-18	CTKBCytek Biosciences, Inc.F Tax Payment	Director, CHIEF TECHNOLOGY OFFICER	FTax Payment	−1,501 sh	$4.67	−$7,009.67	4,811,113
2026-08-18	CTKBCytek Biosciences, Inc.M Exercise/Conversion	Director, CHIEF TECHNOLOGY OFFICER	MExercise/Conversion	+14.2K sh	—	—	4,825,333
2026-08-18	CTKBCytek Biosciences, Inc.F Tax Payment	Director, CHIEF TECHNOLOGY OFFICER	FTax Payment	−3,463 sh	$4.67	−$16.2K	4,821,870
2026-08-18	CTKBCytek Biosciences, Inc. · Restricted Stock UnitsM Exercise/Conversion	Director, CHIEF TECHNOLOGY OFFICER	MExercise/Conversion	−7,363 sh	—	—	17,189
2026-08-18	CTKBCytek Biosciences, Inc. · Restricted Stock UnitsM Exercise/Conversion	Director, CHIEF TECHNOLOGY OFFICER	MExercise/Conversion	−5,525 sh	—	—	34,995
2026-08-18	CTKBCytek Biosciences, Inc. · Restricted Stock UnitsM Exercise/Conversion	Director, CHIEF TECHNOLOGY OFFICER	MExercise/Conversion	−6,162 sh	—	—	63,688
2026-08-18	CTKBCytek Biosciences, Inc. · Restricted Stock UnitsM Exercise/Conversion	Director, CHIEF TECHNOLOGY OFFICER	MExercise/Conversion	−14.2K sh	—	—	203,835
2026-06-12	CTKBCytek Biosciences, Inc.G Gift	Director, CHIEF TECHNOLOGY OFFICER	GGift	−136K sh	—	—	4,796,688
2026-05-18	CTKBCytek Biosciences, Inc.M Exercise/Conversion	Director, CHIEF TECHNOLOGY OFFICER	MExercise/Conversion	+4,908 sh	—	—	4,920,841
2026-05-18	CTKBCytek Biosciences, Inc.F Tax Payment	Director, CHIEF TECHNOLOGY OFFICER	FTax Payment	−1,224 sh	$3.55	−$4,345.2	4,919,617
2026-05-18	CTKBCytek Biosciences, Inc.M Exercise/Conversion	Director, CHIEF TECHNOLOGY OFFICER	MExercise/Conversion	+3,683 sh	—	—	4,923,300
2026-05-18	CTKBCytek Biosciences, Inc.F Tax Payment	Director, CHIEF TECHNOLOGY OFFICER	FTax Payment	−919 sh	$3.55	−$3,262.45	4,922,381
2026-05-18	CTKBCytek Biosciences, Inc.M Exercise/Conversion	Director, CHIEF TECHNOLOGY OFFICER	MExercise/Conversion	+4,108 sh	—	—	4,926,489
2026-05-18	CTKBCytek Biosciences, Inc.F Tax Payment	Director, CHIEF TECHNOLOGY OFFICER	FTax Payment	−1,025 sh	$3.55	−$3,638.75	4,925,464
2026-05-18	CTKBCytek Biosciences, Inc.M Exercise/Conversion	Director, CHIEF TECHNOLOGY OFFICER	MExercise/Conversion	+9,480 sh	—	—	4,934,944
2026-05-18	CTKBCytek Biosciences, Inc.F Tax Payment	Director, CHIEF TECHNOLOGY OFFICER	FTax Payment	−2,364 sh	$3.55	−$8,392.2	4,932,580
2026-05-18	CTKBCytek Biosciences, Inc. · Restricted Stock UnitsM Exercise/Conversion	Director, CHIEF TECHNOLOGY OFFICER	MExercise/Conversion	−4,908 sh	—	—	24,552
2026-05-18	CTKBCytek Biosciences, Inc. · Restricted Stock UnitsM Exercise/Conversion	Director, CHIEF TECHNOLOGY OFFICER	MExercise/Conversion	−3,683 sh	—	—	40,520
2026-05-18	CTKBCytek Biosciences, Inc. · Restricted Stock UnitsM Exercise/Conversion	Director, CHIEF TECHNOLOGY OFFICER	MExercise/Conversion	−4,108 sh	—	—	69,850
2026-05-18	CTKBCytek Biosciences, Inc. · Restricted Stock UnitsM Exercise/Conversion	Director, CHIEF TECHNOLOGY OFFICER	MExercise/Conversion	−9,480 sh	—	—	218,055
2026-03-13	CTKBCytek Biosciences, Inc.G Gift	Director, CHIEF TECHNOLOGY OFFICER	GGift	−1.18M sh	—	—	4,915,933
2026-03-10	CTKBCytek Biosciences, Inc.M Exercise/Conversion	Director, CHIEF TECHNOLOGY OFFICER	MExercise/Conversion	+9,817 sh	—	—	6,084,081
2026-03-10	CTKBCytek Biosciences, Inc.F Tax Payment	Director, CHIEF TECHNOLOGY OFFICER	FTax Payment	−3,047 sh	$4.23	−$12.9K	6,081,034
2026-03-10	CTKBCytek Biosciences, Inc.M Exercise/Conversion	Director, CHIEF TECHNOLOGY OFFICER	MExercise/Conversion	+7,366 sh	—	—	6,088,400
2026-03-10	CTKBCytek Biosciences, Inc.F Tax Payment	Director, CHIEF TECHNOLOGY OFFICER	FTax Payment	−2,287 sh	$4.23	−$9,674.01	6,086,113
2026-03-10	CTKBCytek Biosciences, Inc.M Exercise/Conversion	Director, CHIEF TECHNOLOGY OFFICER	MExercise/Conversion	+8,217 sh	—	—	6,094,330
2026-03-10	CTKBCytek Biosciences, Inc.F Tax Payment	Director, CHIEF TECHNOLOGY OFFICER	FTax Payment	−2,397 sh	$4.23	−$10.1K	6,091,933
2026-03-10	CTKBCytek Biosciences, Inc. · Employee Stock Option (right to buy)A Award	Director, CHIEF TECHNOLOGY OFFICER	AAward	+121K sh	—	—	120,688
2026-03-10	CTKBCytek Biosciences, Inc. · Restricted Stock UnitsA Award	Director, CHIEF TECHNOLOGY OFFICER	AAward	+228K sh	—	—	227,535
2026-03-10	CTKBCytek Biosciences, Inc. · Restricted Stock UnitsM Exercise/Conversion	Director, CHIEF TECHNOLOGY OFFICER	MExercise/Conversion	−9,817 sh	—	—	29,460
2026-03-10	CTKBCytek Biosciences, Inc. · Restricted Stock UnitsM Exercise/Conversion	Director, CHIEF TECHNOLOGY OFFICER	MExercise/Conversion	−7,366 sh	—	—	44,203
2026-03-10	CTKBCytek Biosciences, Inc. · Restricted Stock UnitsM Exercise/Conversion	Director, CHIEF TECHNOLOGY OFFICER	MExercise/Conversion	−8,217 sh	—	—	73,958
2026-02-18	CTKBCytek Biosciences, Inc.M Exercise/Conversion	Director, CHIEF TECHNOLOGY OFFICER	MExercise/Conversion	+1,332 sh	—	—	6,074,659
2026-02-18	CTKBCytek Biosciences, Inc.F Tax Payment	Director, CHIEF TECHNOLOGY OFFICER	FTax Payment	−395 sh	$4.20	−$1,659	6,074,264
2026-02-18	CTKBCytek Biosciences, Inc. · Restricted Stock UnitsM Exercise/Conversion	Director, CHIEF TECHNOLOGY OFFICER	MExercise/Conversion	−1,332 sh	—	—	0
2025-11-18	CTKBCytek Biosciences, Inc.M Exercise/Conversion	Director, CHIEF TECHNOLOGY OFFICER	MExercise/Conversion	+1,981 sh	—	—	6,059,400
2025-11-18	CTKBCytek Biosciences, Inc.F Tax Payment	Director, CHIEF TECHNOLOGY OFFICER	FTax Payment	−483 sh	$5.53	−$2,670.99	6,058,917
2025-11-18	CTKBCytek Biosciences, Inc.M Exercise/Conversion	Director, CHIEF TECHNOLOGY OFFICER	MExercise/Conversion	+7,363 sh	—	—	6,066,280
2025-11-18	CTKBCytek Biosciences, Inc.F Tax Payment	Director, CHIEF TECHNOLOGY OFFICER	FTax Payment	−1,793 sh	$5.53	−$9,915.29	6,064,487
2025-11-18	CTKBCytek Biosciences, Inc.M Exercise/Conversion	Director, CHIEF TECHNOLOGY OFFICER	MExercise/Conversion	+5,525 sh	—	—	6,070,012
2025-11-18	CTKBCytek Biosciences, Inc.F Tax Payment	Director, CHIEF TECHNOLOGY OFFICER	FTax Payment	−1,346 sh	$5.53	−$7,443.38	6,068,666
2025-11-18	CTKBCytek Biosciences, Inc.M Exercise/Conversion	Director, CHIEF TECHNOLOGY OFFICER	MExercise/Conversion	+6,162 sh	—	—	6,074,828
2025-11-18	CTKBCytek Biosciences, Inc.F Tax Payment	Director, CHIEF TECHNOLOGY OFFICER	FTax Payment	−1,501 sh	$5.53	−$8,300.53	6,073,327
2025-11-18	CTKBCytek Biosciences, Inc. · Restricted Stock UnitsM Exercise/Conversion	Director, CHIEF TECHNOLOGY OFFICER	MExercise/Conversion	−1,981 sh	—	—	1,332
2025-11-18	CTKBCytek Biosciences, Inc. · Restricted Stock UnitsM Exercise/Conversion	Director, CHIEF TECHNOLOGY OFFICER	MExercise/Conversion	−7,363 sh	—	—	39,277

Recent filings

Accepted (ET)
Aug 204
Yan Ming0001874041-26-000009
SEC(opens sec.gov)
Jun 164
Yan Ming0001874041-26-000007
SEC(opens sec.gov)
May 204
Yan Ming0001874041-26-000005
SEC(opens sec.gov)

Companies

Cytek Biosciences, Inc.Director, CHIEF TECHNOLOGY OFFICERCTKB

Address

C/O CYTEK BIOSCIENCES, INC. 47215 LAKEVIEW BOULEVARD

FREMONT, CA, 94538