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

Quoteable Key Fact

"FRONTIER CAPITAL MANAGEMENT CO LLC disclosed 7.7% ownership in Ultra Clean Holdings, Inc. Common stock, par value $0.001 per share (UCTT) on 31 Dec 2025."

Quick Takeaways

  • FRONTIER CAPITAL MANAGEMENT CO LLC filed SCHEDULE 13G for Ultra Clean Holdings, Inc. Common stock, par value $0.001 per share (UCTT).
  • Disclosed ownership: 7.7%.
  • Date of event: 31 Dec 2025.

What Changed

  • No earlier schedule filing is available for direct comparison.
  • Current filing was accepted on 17 Feb 2026, 11:27.

Why This Matters

  • This page explains what this Schedule 13D/13G filing tells you before manager-level rows.
  • You can verify ownership claims directly against the original SEC filing.

Source Evidence

Backed by Schedule 13D/13G

Beneficial ownership values are sourced from the original SEC Schedule 13D/13G filing.

See Original Filing

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