MKS INC — Director's Dealing 2024

Jan 23, 2024

SEC Form 4 — Statement of Changes in Beneficial Ownership

Issuer: MKS INSTRUMENTS INC (MKSI)
CIK: 0001049502
Period of Report: 2024-01-22

Reporting Person: COLELLA GERARD G (Director)

Non-Derivative Transactions

Date	Security	Code	Shares	Price	A/D	Holdings After	Ownership
2024-01-22	Common Stock	S	10000	$110.0004	Disposed	78017	Indirect

Holdings (Non-Derivative)

Security	Shares	Ownership
Common Stock	4115.791	Direct

Footnotes

F1: This transaction was effected pursuant to a Rule 10b5-1 trading plan adopted by the reporting person on May 8, 2023.

F2: This transaction was executed in multiple trades at prices ranging from $110.00 to $110.025. 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.