Lee John Tseng-Chung bought MKSI
October 30, 2026 · Form 4 insider transaction
Lee John Tseng-Chung bought 1,478.864 shares of MKS Inc., a transaction worth N/A. The trade was recorded as option exercise and disclosed on an SEC Form 4, filed 4 days after the transaction.
Direction
Acquired (buy-side)
Shares
1,478.864
Price
N/A
Total value
N/A
InsiderLee John Tseng-Chung
Role—
CompanyMKS Inc. (MKSI)
SecurityCommon Stock
Transaction codeM: Option exercise
Transaction dateOctober 30, 2026
Filing dateNovember 3, 2026
Shares owned after136,255
OwnershipDirect
10b5-1 planNo
AmendedNo
Footnotes
Each restricted stock unit (RSU) represents the contingent right to receive one share of common stock of MKS Inc.