February 8, 2026 · Form 4 insider transaction
Lee John Tseng-Chung bought 50,972 shares of MKS Inc., a transaction worth N/A. The trade was recorded as grant or award and disclosed on an SEC Form 4, filed 1 day after the transaction.
Each restricted stock unit (RSU) represents the contingent right to receive one share of common stock of MKS Inc.; These RSUs were subject to performance criteria, the achievement of which was determined on February 8, 2026, and thereafter vest in three equal annual installments beginning on February 15, 2026, provided that if, in any vesting year, February 15th is not a business day, such vesting shall occur on the next business day.