BlackRock, Inc. - 30 Sep 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: 66,905,261 shares
Disclosed Ownership: 5,887,663 shares
Ownership: 8.8%
Form type: SCHEDULE 13G/A
Filing time: 17 Oct 2025, 18:13:43 UTC
Date of event: 30 Sep 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%	5,887,663	5,669,807	0	Spencer Fleming	Managing Director