Ultra Clean Holdings, Inc. SEC filings UCTT
Ultra Clean Holdings, Inc. has 1,000 filings in SEC EDGAR's recent list, going back to Apr 25, 2014. Its latest annual report, Form ARS, was filed on Apr 27, 2026 for the period ended Dec 26, 2025. The latest quarterly report (Form 10-Q) was filed on Oct 28, 2026, covering the quarter ended Sep 25, 2026. The most recent current report (Form 8-K) was filed on Oct 27, 2026 (results of operations). The company's fiscal year ends on December 30.
| Form | Description | Filed | Period |
|---|---|---|---|
| 4 | Insider transaction | Nov 3, 2026 | Oct 30, 2026 |
| 4 | Insider transaction | Oct 2, 2026 | Sep 30, 2026 |
| 3 | Initial insider ownership | Oct 2, 2026 | Sep 28, 2026 |
| 4 | Insider transaction | Sep 4, 2026 | Aug 31, 2026 |
| 3 | Initial insider ownership | Sep 4, 2026 | Aug 5, 2026 |
| 4 | Insider transaction | Sep 2, 2026 | Aug 31, 2026 |
| SCHEDULE 13G | Ownership over 5% (passive) | Aug 13, 2026 | — |
| SCHEDULE 13G | Ownership over 5% (passive) | Aug 12, 2026 | — |
| SCHEDULE 13G | Ownership over 5% (passive) | Jul 31, 2026 | — |
| 4 | Insider transaction | Jul 7, 2026 | Jul 2, 2026 |
| 144 | Notice of proposed sale | Jul 2, 2026 | — |
| 4 | Insider transaction | Jun 30, 2026 | Jun 26, 2026 |
| 4 | Insider transaction | Jun 9, 2026 | Jun 4, 2026 |
| 4 | Insider transaction | Jun 9, 2026 | Jun 4, 2026 |
| 4 | Insider transaction | Jun 8, 2026 | Jun 4, 2026 |
| 4 | Insider transaction | Jun 4, 2026 | Jun 2, 2026 |
| 144 | Notice of proposed sale | Jun 4, 2026 | — |
| 144 | Notice of proposed sale | Jun 4, 2026 | — |
| 144 | Notice of proposed sale | Jun 2, 2026 | — |
| 4 | Insider transaction | May 27, 2026 | May 22, 2026 |
| 4 | Insider transaction | May 27, 2026 | May 22, 2026 |
| 4 | Insider transaction | May 27, 2026 | May 22, 2026 |
| 4 | Insider transaction | May 27, 2026 | May 22, 2026 |
| 4 | Insider transaction | May 27, 2026 | May 22, 2026 |
| 4 | Insider transaction | May 27, 2026 | May 22, 2026 |
| 4 | Insider transaction | May 27, 2026 | May 22, 2026 |
| 4 | Insider transaction | May 27, 2026 | May 22, 2026 |
| 4 | Insider transaction | May 27, 2026 | May 22, 2026 |
| 4 | Insider transaction | May 27, 2026 | May 22, 2026 |
| 4 | Insider transaction | May 27, 2026 | May 22, 2026 |
| 4 | Insider transaction | May 27, 2026 | May 22, 2026 |
| 4 | Insider transaction | May 27, 2026 | May 22, 2026 |
| 4 | Insider transaction | May 27, 2026 | May 22, 2026 |
| 4 | Insider transaction | May 27, 2026 | May 22, 2026 |
| 4 | Insider transaction | May 27, 2026 | May 22, 2026 |
| 144 | Notice of proposed sale | May 27, 2026 | — |
| 4 | Insider transaction | May 18, 2026 | May 14, 2026 |
| SCHEDULE 13G/A | Amended ownership over 5% (passive) | May 15, 2026 | — |
| 144 | Notice of proposed sale | May 14, 2026 | — |
| 4 | Insider transaction | May 12, 2026 | May 8, 2026 |
| 4 | Insider transaction | May 12, 2026 | May 8, 2026 |
| 144 | Notice of proposed sale | May 8, 2026 | — |
| 144 | Notice of proposed sale | May 8, 2026 | — |
| SCHEDULE 13G/A | Amended ownership over 5% (passive) | May 8, 2026 | — |
| 4 | Insider transaction | May 7, 2026 | May 5, 2026 |
| 4 | Insider transaction | May 7, 2026 | May 5, 2026 |
| 4 | Insider transaction | May 6, 2026 | May 4, 2026 |
| 4 | Insider transaction | May 5, 2026 | May 1, 2026 |
| 144 | Notice of proposed sale | May 5, 2026 | — |
| 4 | Insider transaction | May 4, 2026 | Apr 30, 2026 |
| 4 | Insider transaction | May 4, 2026 | Apr 30, 2026 |
| 4 | Insider transaction | May 4, 2026 | Apr 30, 2026 |
| 4 | Insider transaction | May 4, 2026 | Apr 30, 2026 |
| 4 | Insider transaction | May 4, 2026 | Apr 30, 2026 |
| 4 | Insider transaction | May 4, 2026 | Apr 30, 2026 |
| 144 | Notice of proposed sale | May 4, 2026 | — |
| 144 | Notice of proposed sale | May 4, 2026 | — |
| 144 | Notice of proposed sale | May 1, 2026 | — |
| 144 | Notice of proposed sale | May 1, 2026 | — |
| SCHEDULE 13G | Ownership over 5% (passive) | Apr 29, 2026 | — |
| 4 | Insider transaction | Apr 2, 2026 | Mar 31, 2026 |
| 3 | Initial insider ownership | Mar 31, 2026 | Mar 23, 2026 |
| SCHEDULE 13G/A | Amended ownership over 5% (passive) | Mar 27, 2026 | — |
| 4 | Insider transaction | Mar 3, 2026 | Feb 27, 2026 |
| SCHEDULE 13G | Ownership over 5% (passive) | Feb 17, 2026 | — |
| SCHEDULE 13G/A | Amended ownership over 5% (passive) | Feb 17, 2026 | — |
| SCHEDULE 13G | Ownership over 5% (passive) | Feb 12, 2026 | — |
| 4 | Insider transaction | Dec 5, 2025 | Dec 3, 2025 |
| 4 | Insider transaction | Dec 4, 2025 | Dec 2, 2025 |
| 144 | Notice of proposed sale | Dec 3, 2025 | — |
| 4 | Insider transaction | Nov 28, 2025 | Nov 25, 2025 |
| 4 | Insider transaction | Sep 30, 2025 | Sep 26, 2025 |
| 4 | Insider transaction | Sep 16, 2025 | Sep 12, 2025 |
| 3 | Initial insider ownership | Sep 16, 2025 | Sep 2, 2025 |
| 4 | Insider transaction | Sep 3, 2025 | Aug 29, 2025 |
| 3 | Initial insider ownership | Aug 25, 2025 | Aug 15, 2025 |
| SCHEDULE 13G | Ownership over 5% (passive) | Aug 14, 2025 | — |
| SCHEDULE 13G/A | Amended ownership over 5% (passive) | Jul 15, 2025 | — |
| 4 | Insider transaction | Jul 2, 2025 | Jun 30, 2025 |
| 4 | Insider transaction | Jul 2, 2025 | Jun 30, 2025 |
| 4 | Insider transaction | Jun 10, 2025 | Jun 6, 2025 |
| 4 | Insider transaction | Jun 6, 2025 | Jun 4, 2025 |
| 144 | Notice of proposed sale | Jun 6, 2025 | — |
| 144 | Notice of proposed sale | Jun 4, 2025 | — |
| 4 | Insider transaction | May 27, 2025 | May 21, 2025 |
| 4 | Insider transaction | May 27, 2025 | May 21, 2025 |
| 4 | Insider transaction | May 23, 2025 | May 21, 2025 |
| 4 | Insider transaction | May 23, 2025 | May 21, 2025 |
| 4 | Insider transaction | May 23, 2025 | May 21, 2025 |
| 4 | Insider transaction | May 23, 2025 | May 21, 2025 |
| 4 | Insider transaction | May 23, 2025 | May 21, 2025 |
| SCHEDULE 13G/A | Amended ownership over 5% (passive) | May 15, 2025 | — |
| 4 | Insider transaction | May 8, 2025 | May 6, 2025 |
| 144 | Notice of proposed sale | May 6, 2025 | — |
| 4 | Insider transaction | May 2, 2025 | Apr 30, 2025 |
| 4 | Insider transaction | May 2, 2025 | Apr 30, 2025 |
| 4 | Insider transaction | May 2, 2025 | Apr 30, 2025 |
| 4 | Insider transaction | May 2, 2025 | Apr 30, 2025 |
| 4 | Insider transaction | May 2, 2025 | Apr 30, 2025 |
| 4 | Insider transaction | May 2, 2025 | Apr 30, 2025 |
| 4 | Insider transaction | May 2, 2025 | Apr 30, 2025 |
| SCHEDULE 13G/A | Amended ownership over 5% (passive) | Apr 30, 2025 | — |
| 4 | Insider transaction | Apr 29, 2025 | Apr 25, 2025 |
| 4 | Insider transaction | Apr 29, 2025 | Apr 25, 2025 |
| 4 | Insider transaction | Apr 29, 2025 | Apr 25, 2025 |
| 4 | Insider transaction | Apr 29, 2025 | Apr 25, 2025 |
| 4 | Insider transaction | Apr 29, 2025 | Apr 25, 2025 |
| 4 | Insider transaction | Apr 29, 2025 | Apr 25, 2025 |
| 4 | Insider transaction | Apr 29, 2025 | Apr 25, 2025 |
| 4 | Insider transaction | Apr 29, 2025 | Apr 25, 2025 |
| SCHEDULE 13G/A | Amended ownership over 5% (passive) | Apr 15, 2025 | — |
| 4 | Insider transaction | Apr 2, 2025 | Mar 31, 2025 |
| 4 | Insider transaction | Apr 2, 2025 | Mar 31, 2025 |
| 4 | Insider transaction | Apr 2, 2025 | Mar 31, 2025 |
| 4 | Insider transaction | Apr 1, 2025 | Mar 28, 2025 |
| 4 | Insider transaction | Mar 11, 2025 | Mar 7, 2025 |
| 4 | Insider transaction | Mar 11, 2025 | Mar 7, 2025 |
| 4 | Insider transaction | Mar 11, 2025 | Mar 7, 2025 |
| 4 | Insider transaction | Mar 11, 2025 | Mar 7, 2025 |
| 4 | Insider transaction | Mar 11, 2025 | Mar 7, 2025 |
| 4 | Insider transaction | Mar 4, 2025 | Feb 28, 2025 |
| 3 | Initial insider ownership | Mar 4, 2025 | Feb 28, 2025 |
| SCHEDULE 13G | Ownership over 5% (passive) | Feb 14, 2025 | — |
| SCHEDULE 13G/A | Amended ownership over 5% (passive) | Jan 16, 2025 | — |
| 4 | Insider transaction | Jan 3, 2025 | Dec 31, 2024 |
| 4 | Insider transaction | Nov 19, 2024 | Nov 15, 2024 |
| 4 | Insider transaction | Nov 15, 2024 | Nov 13, 2024 |
| SCHEDULE 13G/A | Amended ownership over 5% (passive) | Nov 13, 2024 | — |
| 4 | Insider transaction | Nov 12, 2024 | Nov 7, 2024 |
| 144 | Notice of proposed sale | Nov 7, 2024 | — |
| 4 | Insider transaction | Nov 4, 2024 | Oct 31, 2024 |
| 4 | Insider transaction | Nov 4, 2024 | Oct 31, 2024 |
| 4 | Insider transaction | Sep 4, 2024 | Aug 31, 2024 |
| SC 13G/A | Amended ownership over 5% (passive) | Aug 12, 2024 | — |
| 4 | Insider transaction | Jul 15, 2024 | Jul 11, 2024 |
| 144 | Notice of proposed sale | Jul 12, 2024 | — |
| 4 | Insider transaction | Jul 11, 2024 | Jul 9, 2024 |
| 144 | Notice of proposed sale | Jul 11, 2024 | — |
| 4 | Insider transaction | Jul 10, 2024 | Jul 8, 2024 |
| 144 | Notice of proposed sale | Jul 9, 2024 | — |
| 144 | Notice of proposed sale | Jul 8, 2024 | — |
| 4 | Insider transaction | Jul 3, 2024 | Jul 2, 2024 |
| 4 | Insider transaction | Jul 2, 2024 | Jun 30, 2024 |
| 4 | Insider transaction | Jul 2, 2024 | Jun 28, 2024 |
| 144 | Notice of proposed sale | Jul 2, 2024 | — |
| 3 | Initial insider ownership | Jun 20, 2024 | Jun 10, 2024 |
| 4 | Insider transaction | Jun 11, 2024 | Jun 7, 2024 |
| 144 | Notice of proposed sale | Jun 10, 2024 | — |
| 144 | Notice of proposed sale | Jun 7, 2024 | — |
| 4 | Insider transaction | May 29, 2024 | May 24, 2024 |
| 4 | Insider transaction | May 24, 2024 | May 22, 2024 |
| 4 | Insider transaction | May 24, 2024 | May 22, 2024 |
| 4 | Insider transaction | May 24, 2024 | May 22, 2024 |
| 4 | Insider transaction | May 24, 2024 | May 22, 2024 |
| 4 | Insider transaction | May 24, 2024 | May 22, 2024 |
| 4 | Insider transaction | May 24, 2024 | May 22, 2024 |
| 4 | Insider transaction | May 24, 2024 | May 22, 2024 |
| 144 | Notice of proposed sale | May 24, 2024 | — |
| 4 | Insider transaction | May 21, 2024 | May 17, 2024 |
| 4 | Insider transaction | May 17, 2024 | May 15, 2024 |
| 144 | Notice of proposed sale | May 17, 2024 | — |
| 144 | Notice of proposed sale | May 15, 2024 | — |
| 4 | Insider transaction | May 13, 2024 | May 9, 2024 |
| 4 | Insider transaction | May 13, 2024 | May 9, 2024 |
| 4 | Insider transaction | May 13, 2024 | May 9, 2024 |
| 4 | Insider transaction | May 13, 2024 | May 9, 2024 |
| 144 | Notice of proposed sale | May 10, 2024 | — |
| 144 | Notice of proposed sale | May 9, 2024 | — |
| 144 | Notice of proposed sale | May 9, 2024 | — |
| 144 | Notice of proposed sale | May 9, 2024 | — |
| 144 | Notice of proposed sale | May 9, 2024 | — |
| 4 | Insider transaction | May 8, 2024 | May 6, 2024 |
| 4 | Insider transaction | May 2, 2024 | Apr 30, 2024 |
| 4 | Insider transaction | May 2, 2024 | Apr 30, 2024 |
| 4 | Insider transaction | May 2, 2024 | Apr 30, 2024 |
| 4 | Insider transaction | May 2, 2024 | Apr 30, 2024 |
| 4 | Insider transaction | May 2, 2024 | Apr 30, 2024 |
| 4 | Insider transaction | May 2, 2024 | Apr 30, 2024 |
| 4 | Insider transaction | May 2, 2024 | Apr 30, 2024 |
| 4 | Insider transaction | May 2, 2024 | Apr 30, 2024 |
| 4 | Insider transaction | Apr 30, 2024 | Apr 26, 2024 |
| 4 | Insider transaction | Apr 30, 2024 | Apr 26, 2024 |
| 4 | Insider transaction | Apr 30, 2024 | Apr 26, 2024 |
| 4 | Insider transaction | Apr 30, 2024 | Apr 26, 2024 |
| 4 | Insider transaction | Apr 30, 2024 | Apr 26, 2024 |
| 4 | Insider transaction | Apr 30, 2024 | Apr 26, 2024 |
| 4 | Insider transaction | Apr 30, 2024 | Apr 26, 2024 |
| 4 | Insider transaction | Apr 30, 2024 | Apr 26, 2024 |
| 4 | Insider transaction | Apr 15, 2024 | Nov 14, 2023 |
| 4 | Insider transaction | Apr 2, 2024 | Mar 31, 2024 |
| 4 | Insider transaction | Apr 2, 2024 | Mar 31, 2024 |
| 4 | Insider transaction | Apr 2, 2024 | Mar 31, 2024 |
| 4 | Insider transaction | Apr 2, 2024 | Mar 31, 2024 |
| 4 | Insider transaction | Apr 2, 2024 | Mar 31, 2024 |
| SC 13G | Ownership over 5% (passive) | Feb 14, 2024 | — |
| SC 13G/A | Amended ownership over 5% (passive) | Feb 13, 2024 | — |
| SC 13G/A | Amended ownership over 5% (passive) | Feb 9, 2024 | — |
| 4 | Insider transaction | Feb 6, 2024 | Dec 17, 2021 |
| SC 13G/A | Amended ownership over 5% (passive) | Jan 25, 2024 | — |
| SC 13G/A | Amended ownership over 5% (passive) | Jan 22, 2024 | — |
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Company profile
- Industry
- Semiconductors & Related Devices (SIC 3674)
- Listed as
- UCTT (Nasdaq)
- Fiscal year ends
- December 30
- Incorporated in
- DE
- Headquarters
- Hayward, CA
- SEC filer status
- Large accelerated filer
- SEC CIK
- 1275014
- Former names
- ULTRA CLEAN HOLDINGS INC (until Feb 17, 2015)
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Source: SEC EDGAR filings. This is company-reported data, not investment advice.