John Edward Williams - Apr 17, 2025 Form 4 Insider Report for MKS INSTRUMENTS INC (MKSI)

Role
EVP & GM, PSD
Signature
/s/ James Kruger, attorney-in-fact
Stock symbol
MKSI
Transactions as of
Apr 17, 2025
Transactions value $
-$35,985
Form type
4
Date filed
4/18/2025, 11:04 AM
Previous filing
Feb 19, 2025
SEC
View on sec.gov

Transactions Table

Type Sym Class Transaction Value $ Shares Change % * Price $ Shares After Date Ownership Footnotes
transaction MKSI Common Stock Options Exercise +1.74K +95.3% 3.57K Apr 17, 2025 Direct F1
transaction MKSI Common Stock Tax liability -$36K -565 -15.84% $63.69 3K Apr 17, 2025 Direct F2

Derivative Securities (e.g., puts, calls, warrants, options, convertible securities)

Type Sym Class Transaction Value $ Shares Change % * Price $ Shares After Date Underlying Class Amount Exercise Price Ownership Footnotes
transaction MKSI Restricted Stock Unit Options Exercise -1.74K -17.35% 8.29K Apr 17, 2025 Common Stock 1.74K Direct F1, F3
* An asterisk sign (*) next to the price indicates that the price is likely invalid.

Explanation of Responses:

Id Content
F1 Each restricted stock unit (RSU) represents the contingent right to receive one share of common stock of MKS Instruments, Inc.
F2 These shares were withheld by MKS Instruments, Inc. to satisfy the tax withholding obligations triggered by the vesting of RSUs and do not represent a discretionary trade by the reporting person.
F3 These RSUs vest in two equal annual installments commencing on April 17, 2025, provided that if, in any vesting year, April 17th is not a business day, such vesting shall occur on the next business day.