Lee John Tseng-Chung sold MKSI
May 22, 2026 · Form 4 insider transaction
Lee John Tseng-Chung sold 10,000 shares of MKS Inc. at $315.48 per share, a transaction worth $3.15M. The trade was recorded as open-market sale under a pre-scheduled Rule 10b5-1 plan and disclosed on an SEC Form 4, filed 4 days after the transaction.
Direction
Disposed (sell-side)
Shares
10,000
Price
$315.48
Total value
$3.15M
InsiderLee John Tseng-Chung
Role—
CompanyMKS Inc. (MKSI)
SecurityCommon Stock
Transaction codeS: Open-market sale
Transaction dateMay 22, 2026
Filing dateMay 26, 2026
Shares owned after144,696
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.