John Edward Williams - 18 Feb 2025 Form 4 Insider Report for MKS INSTRUMENTS INC (MKSI)

Role
EVP & GM, PSD
Signature
/s/ M. Kathryn Rickards, attorney-in-fact
Issuer symbol
MKSI
Transactions as of
18 Feb 2025
Net transactions value
-$93,407
Form type
4
Filing time
19 Feb 2025, 18:47:20 UTC
Previous filing
11 Feb 2025
Next filing
18 Apr 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 +915 +7038% 928 18 Feb 2025 Direct F1
transaction MKSI Common Stock Options Exercise +658 +71% 1,586 18 Feb 2025 Direct F1
transaction MKSI Common Stock Options Exercise +300 +19% 1,886 18 Feb 2025 Direct F1
transaction MKSI Common Stock Options Exercise +841 +45% 2,727 18 Feb 2025 Direct F1
transaction MKSI Common Stock Tax liability $93,407 -901 -33% $103.67 1,826 18 Feb 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 Award +3,318 +35% 12,745 18 Feb 2025 Common Stock 3,318 Direct F1, F3
transaction MKSI Restricted Stock Unit Options Exercise -915 -7.2% 11,830 18 Feb 2025 Common Stock 915 Direct F1, F4
transaction MKSI Restricted Stock Unit Options Exercise -658 -5.6% 11,172 18 Feb 2025 Common Stock 658 Direct F1, F5
transaction MKSI Restricted Stock Unit Options Exercise -300 -2.7% 10,872 18 Feb 2025 Common Stock 300 Direct F1, F6
transaction MKSI Restricted Stock Unit Options Exercise -841 -7.7% 10,031 18 Feb 2025 Common Stock 841 Direct F1, F7
* 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 three equal annual installments commencing 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.
F4 These RSUs were subject to performance criteria, the achievement of which was determined on February 8, 2023, and thereafter vest in three equal annual installments beginning on February 15, 2023, provided that if, in any vesting year, February 15th is not a business day, such vesting shall occur on the next business day.
F5 These RSUs vest in three equal annual installments commencing on February 15, 2023, provided that if, in any vesting year, February 15th is not a business day, such vesting shall occur on the next business day.
F6 These RSUs were subject to performance criteria, the achievement of which was determined on February 10, 2025, and thereafter vest in three equal annual installments beginning on February 15, 2025, provided that if, in any vesting year, February 15th is not a business day, such vesting shall occur on the next business day.
F7 These RSUs vest in three equal annual installments commencing on February 15, 2025, provided that if, in any vesting year, February 15th is not a business day, such vesting shall occur on the next business day.