James Alan Schreiner - 18 Aug 2025 Form 4 Insider Report for MKS INC (MKSI)

Role
EVP & COO
Signature
/s/ M. Kathryn Rickards, attorney-in-fact
Issuer symbol
MKSI
Transactions as of
18 Aug 2025
Net transactions value
-$125,175
Form type
4
Filing time
19 Aug 2025, 13:05:57 UTC
Previous filing
05 Aug 2025
Next filing
19 Sep 2025
SEC
View on sec.gov

Reporting Owners (1)

Name Relationship Address Signature Signature date CIK
Schreiner James Alan EVP & COO C/O MKS INC., 2 TECH DRIVE, ANDOVER /s/ M. Kathryn Rickards, attorney-in-fact 19 Aug 2025 0001797189

Transactions Table

Type Sym Class Transaction Value $ Shares Change % * Price $ Shares After Date Ownership Footnotes
transaction MKSI Common Stock Options Exercise +2,641 +12% 25,333 18 Aug 2025 Direct F1
transaction MKSI Common Stock Tax liability $125,175 -1,249 -4.9% $100.22 24,084 18 Aug 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 -2,641 -17% 13,018 18 Aug 2025 Common Stock 2,641 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 Inc.
F2 These shares were withheld by MKS 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 installments, 60% of which shall vest on August 17, 2024 and 40% of which shall vest on August 17, 2025; provided that if, in any vesting year, August 17th is not a business day, such vesting shall occur on the next business day.