Michelle M. McCarthy - 20 Feb 2026 Form 4 Insider Report for MKS INC (MKSI)

Role
VP & Chief Accounting Officer
Signature
/s/ M. Kathryn Rickards, attorney-in-fact
Issuer symbol
MKSI
Transactions as of
20 Feb 2026
Net transactions value
-$366,503
Form type
4
Filing time
23 Feb 2026, 14:36:47 UTC
Previous filing
17 Apr 2025
SEC
View on sec.gov

Reporting Owners (1)

Name Relationship Address Signature Signature date CIK
McCarthy Michelle M VP & Chief Accounting Officer C/O MKS INC., 2 TECH DRIVE, ANDOVER /s/ M. Kathryn Rickards, attorney-in-fact 23 Feb 2026 0001732461

Transactions Table

Type Sym Class Transaction Value $ Shares Change % * Price $ Shares After Date Ownership Footnotes
transaction MKSI Common Stock Sale $162,219 -650 -44% $249.57 816 20 Feb 2026 Direct F1
transaction MKSI Common Stock Sale $204,284 -816 -100% $250.35 0 20 Feb 2026 Direct F2
* An asterisk sign (*) next to the price indicates that the price is likely invalid.

Explanation of Responses:

Id Content
F1 This transaction was executed in multiple trades at prices ranging from $249.070 to $250.030. The price reported above reflects the weighted average sale price. The reporting person hereby undertakes to provide, upon request, the full information regarding the number of shares and prices at which the transaction was effected.
F2 This transaction was executed in multiple trades at prices ranging from $250.160 to $250.790. The price reported above reflects the weighted average sale price. The reporting person hereby undertakes to provide, upon request, the full information regarding the number of shares and prices at which the transaction was effected.