Burke Kathleen Flaherty sold MKSI
May 11, 2026 · Form 4 insider transaction
Burke Kathleen Flaherty sold 4,355 shares of MKS Inc. at $319.94 per share, a transaction worth $1.39M. The trade was recorded as open-market sale and disclosed on an SEC Form 4, filed 1 day after the transaction.
Direction
Disposed (sell-side)
Shares
4,355
Price
$319.94
Total value
$1.39M
InsiderBurke Kathleen Flaherty
Role—
CompanyMKS Inc. (MKSI)
SecurityCommon Stock
Transaction codeS: Open-market sale
Transaction dateMay 11, 2026
Filing dateMay 12, 2026
Shares owned after49,439
OwnershipDirect
10b5-1 planNo
AmendedNo
Footnotes
This transaction was executed in multiple trades at prices ranging from $319.715 to $320.670. The price reported above reflects the weighted average sale price. The reporting person hereby undertakes to provide, upon request, the full information regarding the number of shares and prices at which the transaction was effected.