FRONTIER CAPITAL MANAGEMENT CO LLC - 31 Dec 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: 45,405,420 shares
Disclosed Ownership: 3,509,839 shares
Ownership: 7.7%
Form type: SCHEDULE 13G
Filing time: 17 Feb 2026, 11:27:08 UTC
Date of event: 31 Dec 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	7.7%	3,509,839	2,078,342	0	Robert E. Phay	Robert E. Phay, Chief Compliance Officer & General Counsel