Gerald G. Colella - 20 Feb 2026 Form 4 Insider Report for MKS INC (MKSI)

Role
Director
Signature
/s/ M. Kathryn Rickards, attorney-in-fact
Issuer symbol
MKSI
Transactions as of
20 Feb 2026
Net transactions value
-$5,068,674
Form type
4
Filing time
24 Feb 2026, 14:26:45 UTC
Previous filing
23 Jul 2025
SEC
View on sec.gov

Reporting Owners (1)

Name Relationship Address Signature Signature date CIK
COLELLA GERALD G Director C/O MKS INC., 2 TECH DRIVE, ANDOVER /s/ M. Kathryn Rickards, attorney-in-fact 24 Feb 2026 0001256715

Transactions Table

Type Sym Class Transaction Value $ Shares Change % * Price $ Shares After Date Ownership Footnotes
transaction MKSI Common Stock Sale $2,528,999 -10,000 -17% $252.90 50,017 20 Feb 2026 By The Gerald G. Colella 2019 Trust F1
transaction MKSI Common Stock Sale $2,539,675 -10,000 -20% $253.97 40,017 24 Feb 2026 By The Gerald G. Colella 2019 Trust F2
holding MKSI Common Stock 8,217 20 Feb 2026 Direct
* 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 $252.60 to $253.86. 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 $253.470 to $255.250. 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.