Lee John Tseng-Chung sold MKSI
August 14, 2026 · Form 4 insider transaction
Lee John Tseng-Chung sold 10,000 shares of MKS Inc. at $302.01 per share, a transaction worth $3.02M. The trade was recorded as open-market sale under a pre-scheduled Rule 10b5-1 plan and disclosed on an SEC Form 4, filed 3 days after the transaction.
Direction
Disposed (sell-side)
Shares
10,000
Price
$302.01
Total value
$3.02M
InsiderLee John Tseng-Chung
Role—
CompanyMKS Inc. (MKSI)
SecurityCommon Stock
Transaction codeS: Open-market sale
Transaction dateAugust 14, 2026
Filing dateAugust 17, 2026
Shares owned after134,776
OwnershipDirect
10b5-1 planYes
AmendedNo
Footnotes
This transaction was effected pursuant to a Rule 10b5-1 trading plan adopted by the reporting person on February 20, 2026.