FRONTIER CAPITAL MANAGEMENT CO LLC - 30 Jun 2025 SCHEDULE 13G Report for Ultra Clean Holdings, Inc. Common stock, par value $0.001 per share (UCTT)

Filing Manager: FRONTIER CAPITAL MANAGEMENT CO LLC
Reporting Manager: FRONTIER CAPITAL MANAGEMENT CO.,LLC
Security: Ultra Clean Holdings, Inc. Common stock, par value $0.001 per share
Symbol: UCTT
Shares outstanding: 45,150,213 shares
Disclosed Ownership: 2,754,163 shares
Ownership: 6.1%
Form type: SCHEDULE 13G
Filing time: 14 Aug 2025, 09:23:48 UTC
Date of event: 30 Jun 2025
Previous filing: 16 Jan 2025
SEC: View on sec.gov

Reporting Managers (1)

Name	Ownership	Shares Owned	sole voting power	shared voting power	Signature	Title	CIK
FRONTIER CAPITAL MANAGEMENT CO.,LLC	6.1%	2,754,163	0	1,615,497	Robert E. Phay	Robert E. Phay, Chief Compliance Officer & General Counsel