Frontier Capital Management Co Llc - Jun 30, 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: 45.2M shares
Disclosed Ownership: 2.75M shares
Ownership: 6.1%
Form type: SCHEDULE 13G
Date filed: 8/14/2025, 09:23 AM
Date of event: Jun 30, 2025
Previous filing: Jan 16, 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%	2.75M	0	1.62M	Robert E. Phay	Robert E. Phay, Chief Compliance Officer & General Counsel