Kathleen Flaherty Burke - Feb 18, 2025 Form 4 Insider Report for MKS INSTRUMENTS INC (MKSI)

Role
EVP, GC & Secretary
Signature
/s/ M. Kathryn Rickards, attorney-in-fact
Stock symbol
MKSI
Transactions as of
Feb 18, 2025
Transactions value $
-$411,570
Form type
4
Date filed
2/19/2025, 06:24 PM
Previous filing
Feb 11, 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 +2.29K +5.29% 45.5K Feb 18, 2025 Direct F1
transaction MKSI Common Stock Options Exercise +1.65K +3.61% 47.2K Feb 18, 2025 Direct F1
transaction MKSI Common Stock Options Exercise +3.61K +7.65% 50.8K Feb 18, 2025 Direct F1
transaction MKSI Common Stock Options Exercise +1.87K +3.68% 52.7K Feb 18, 2025 Direct F1
transaction MKSI Common Stock Options Exercise +588 +1.12% 53.2K Feb 18, 2025 Direct F1
transaction MKSI Common Stock Options Exercise +1.65K +3.1% 54.9K Feb 18, 2025 Direct F1
transaction MKSI Common Stock Tax liability -$412K -3.97K -7.23% $103.67 50.9K Feb 18, 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 +7.82K +36.21% 29.4K Feb 18, 2025 Common Stock 7.82K Direct F1, F3
transaction MKSI Restricted Stock Unit Options Exercise -2.29K -7.77% 27.1K Feb 18, 2025 Common Stock 2.29K Direct F1, F4
transaction MKSI Restricted Stock Unit Options Exercise -1.65K -6.06% 25.5K Feb 18, 2025 Common Stock 1.65K Direct F1, F5
transaction MKSI Restricted Stock Unit Options Exercise -3.61K -14.15% 21.9K Feb 18, 2025 Common Stock 3.61K Direct F1, F6
transaction MKSI Restricted Stock Unit Options Exercise -1.87K -8.55% 20K Feb 18, 2025 Common Stock 1.87K Direct F1, F7
transaction MKSI Restricted Stock Unit Options Exercise -588 -2.94% 19.4K Feb 18, 2025 Common Stock 588 Direct F1, F8
transaction MKSI Restricted Stock Unit Options Exercise -1.65K -8.48% 17.8K Feb 18, 2025 Common Stock 1.65K Direct F1, F9
* 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 5, 2024, and thereafter vest in three equal annual installments beginning on February 15, 2024, 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, 2024, provided that if, in any vesting year, February 15th is not a business day, such vesting shall occur on the next business day.
F8 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.
F9 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.