BlackRock, Inc. - Sep 30, 2025 SCHEDULE 13G/A Report for MKS INSTRUMENTS INC Common Stock (MKSI)

Filing Manager: BlackRock, Inc.
Reporting Manager: BlackRock, Inc.
Security: MKS INSTRUMENTS INC Common Stock
Symbol: MKSI
Shares outstanding: 66.9M shares
Disclosed Ownership: 5.89M shares
Ownership: 8.8%
Form type: SCHEDULE 13G/A
Date filed: 10/17/2025, 06:13 PM
Date of event: Sep 30, 2025
SEC: View on sec.gov

Reporting Managers (1)

Name	Ownership	Shares Owned	sole voting power	shared voting power	Signature	Title	CIK
BlackRock, Inc.	8.8%	5.89M	5.67M	0	Spencer Fleming	Managing Director