Insider · CIK 0001414656

Lee John Tseng-Chung

Reports to the SEC for 2 companies · ANDOVER, MA

sec.gov

Transactions

Companies

Filings

CIK

0001414656

Forms 4 and 5

Insider transactions

50 trades

Date	Company	Role	Code	Shares	Price	Value	Shares after
2026-08-14	MKSIMKS INCS Sale	Director, President & CEO	SSale	−10K sh	$302.01	−$3.02M	134,776.267
2026-05-22	MKSIMKS INCS Sale	Director, President & CEO	SSale	−10K sh	$315.48	−$3.15M	144,696.108
2026-02-21	CGNXCOGNEX CORPM Exercise/Conversion	Director	MExercise/Conversion	+2,913 sh	—	—	24,820
2026-02-21	CGNXCOGNEX CORP · Restricted Stock UnitM Exercise/Conversion	Director	MExercise/Conversion	−2,913 sh	—	—	0
2026-02-20	MKSIMKS INCS Sale	Director, President & CEO	SSale	−13.3K sh	$256.05	−$3.41M	171,386.108
2026-02-20	MKSIMKS INCS Sale	Director, President & CEO	SSale	−12.8K sh	$256.93	−$3.29M	158,574.108
2026-02-20	MKSIMKS INCS Sale	Director, President & CEO	SSale	−1,988 sh	$257.81	−$513K	156,586.108
2026-02-20	MKSIMKS INCS Sale	Director, President & CEO	SSale	−1,890 sh	$259.70	−$491K	154,696.108
2026-02-18	CGNXCOGNEX CORPM Exercise/Conversion	Director	MExercise/Conversion	+8,324 sh	—	—	21,907
2026-02-18	CGNXCOGNEX CORP · Restricted Stock UnitM Exercise/Conversion	Director	MExercise/Conversion	−8,324 sh	—	—	0
2026-02-17	MKSIMKS INCM Exercise/Conversion	Director, President & CEO	MExercise/Conversion	+22.1K sh	—	—	169,443.254
2026-02-17	MKSIMKS INCM Exercise/Conversion	Director, President & CEO	MExercise/Conversion	+7,653.601 sh	—	—	177,096.855
2026-02-17	MKSIMKS INCM Exercise/Conversion	Director, President & CEO	MExercise/Conversion	+3,859.12 sh	—	—	180,955.975
2026-02-17	MKSIMKS INCM Exercise/Conversion	Director, President & CEO	MExercise/Conversion	+7,208 sh	—	—	188,163.975
2026-02-17	MKSIMKS INCM Exercise/Conversion	Director, President & CEO	MExercise/Conversion	+17K sh	—	—	205,153.415
2026-02-17	MKSIMKS INCM Exercise/Conversion	Director, President & CEO	MExercise/Conversion	+12.1K sh	—	—	217,244.415
2026-02-17	MKSIMKS INCF Tax Payment	Director, President & CEO	FTax Payment	−32.5K sh	$260.74	−$8.49M	184,696.108
2026-02-17	MKSIMKS INC · Restricted Stock UnitA Award	Director, President & CEO	AAward	+15.6K sh	—	—	154,717.373
2026-02-17	MKSIMKS INC · Restricted Stock UnitM Exercise/Conversion	Director, President & CEO	MExercise/Conversion	−22.1K sh	—	—	132,629.282
2026-02-17	MKSIMKS INC · Restricted Stock UnitM Exercise/Conversion	Director, President & CEO	MExercise/Conversion	−7,653.601 sh	—	—	124,975.681
2026-02-17	MKSIMKS INC · Restricted Stock UnitM Exercise/Conversion	Director, President & CEO	MExercise/Conversion	−3,859.12 sh	—	—	121,116.561
2026-02-17	MKSIMKS INC · Restricted Stock UnitM Exercise/Conversion	Director, President & CEO	MExercise/Conversion	−7,208 sh	—	—	113,908.561
2026-02-17	MKSIMKS INC · Restricted Stock UnitM Exercise/Conversion	Director, President & CEO	MExercise/Conversion	−17K sh	—	—	96,919.121
2026-02-17	MKSIMKS INC · Restricted Stock UnitM Exercise/Conversion	Director, President & CEO	MExercise/Conversion	−12.1K sh	—	—	84,828.121
2026-02-17	CGNXCOGNEX CORP · Restricted Stock UnitA Award	Director	AAward	+4,817 sh	—	—	4,817
2026-02-08	MKSIMKS INC · Restricted Stock UnitA Award	Director, President & CEO	AAward	+51K sh	—	—	139,124.462
2025-10-31	MKSIMKS INCM Exercise/Conversion	Director, President & CEO	MExercise/Conversion	+352 sh	—	—	147,621.523
2025-10-31	MKSIMKS INCM Exercise/Conversion	Director, President & CEO	MExercise/Conversion	+1,651 sh	—	—	149,272.523
2025-10-31	MKSIMKS INCF Tax Payment	Director, President & CEO	FTax Payment	−2,003 sh	$143.71	−$288K	147,269.523
2025-10-31	MKSIMKS INC · Restricted Stock UnitM Exercise/Conversion	Director, President & CEO	MExercise/Conversion	−352 sh	—	—	89,803.622
2025-10-31	MKSIMKS INC · Restricted Stock UnitM Exercise/Conversion	Director, President & CEO	MExercise/Conversion	−1,651 sh	—	—	88,152.622
2025-05-09	CGNXCOGNEX CORPM Exercise/Conversion	Director	MExercise/Conversion	+1,848 sh	—	—	13,583
2025-05-09	CGNXCOGNEX CORP · Restricted Stock UnitM Exercise/Conversion	Director	MExercise/Conversion	−1,848 sh	—	—	0
2025-02-21	CGNXCOGNEX CORPM Exercise/Conversion	Director	MExercise/Conversion	+1,747 sh	—	—	11,735
2025-02-21	CGNXCOGNEX CORP · Restricted Stock UnitM Exercise/Conversion	Director	MExercise/Conversion	−1,747 sh	—	—	2,913
2025-02-20	CGNXCOGNEX CORPM Exercise/Conversion	Director	MExercise/Conversion	+6,973 sh	—	—	9,988
2025-02-20	CGNXCOGNEX CORP · Restricted Stock UnitM Exercise/Conversion	Director	MExercise/Conversion	−6,973 sh	—	—	0
2025-02-18	MKSIMKS INCM Exercise/Conversion	Director, President & CEO	MExercise/Conversion	+14K sh	—	—	126,729.99
2025-02-18	MKSIMKS INCM Exercise/Conversion	Director, President & CEO	MExercise/Conversion	+6,735.326 sh	—	—	133,465.316
2025-02-18	MKSIMKS INCM Exercise/Conversion	Director, President & CEO	MExercise/Conversion	+22.1K sh	—	—	155,553.316
2025-02-18	MKSIMKS INCM Exercise/Conversion	Director, President & CEO	MExercise/Conversion	+7,654 sh	—	—	163,207.316
2025-02-18	MKSIMKS INCM Exercise/Conversion	Director, President & CEO	MExercise/Conversion	+4,035.12 sh	—	—	167,242.436
2025-02-18	MKSIMKS INCM Exercise/Conversion	Director, President & CEO	MExercise/Conversion	+7,207 sh	—	—	174,449.436
2025-02-18	MKSIMKS INCF Tax Payment	Director, President & CEO	FTax Payment	−27.3K sh	$103.67	−$2.83M	147,117.436
2025-02-18	MKSIMKS INC · Restricted Stock UnitA Award	Director, President & CEO	AAward	+37.9K sh	—	—	151,916.508
2025-02-18	MKSIMKS INC · Restricted Stock UnitM Exercise/Conversion	Director, President & CEO	MExercise/Conversion	−14K sh	—	—	137,875.068
2025-02-18	MKSIMKS INC · Restricted Stock UnitM Exercise/Conversion	Director, President & CEO	MExercise/Conversion	−6,735.326 sh	—	—	131,139.742
2025-02-18	MKSIMKS INC · Restricted Stock UnitM Exercise/Conversion	Director, President & CEO	MExercise/Conversion	−22.1K sh	—	—	109,051.742
2025-02-18	MKSIMKS INC · Restricted Stock UnitM Exercise/Conversion	Director, President & CEO	MExercise/Conversion	−7,654 sh	—	—	101,397.742
2025-02-18	MKSIMKS INC · Restricted Stock UnitM Exercise/Conversion	Director, President & CEO	MExercise/Conversion	−4,035.12 sh	—	—	97,362.622

Recent filings

Accepted (ET)
Aug 174
Lee John Tseng-Chung0001049502-26-000113
SEC(opens sec.gov)
May 264
Lee John Tseng-Chung0001049502-26-000088
SEC(opens sec.gov)
Feb 244
Lee John Tseng-Chung0001414656-26-000004
SEC(opens sec.gov)
Feb 234
Lee John Tseng-Chung0001049502-26-000030
SEC(opens sec.gov)
Feb 194
Lee John Tseng-Chung0001414656-26-000002
SEC(opens sec.gov)
Feb 184
Lee John Tseng-Chung0001049502-26-000016
SEC(opens sec.gov)

Companies

Address

C/O MKS INC. 2 TECH DRIVE

ANDOVER, MA, 01810