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 |
|---|---|---|---|
| SD | Specialized disclosure (conflict minerals) | May 26, 2026 | — |
| SD | Specialized disclosure (conflict minerals) | May 27, 2025 | — |
| SD | Specialized disclosure (conflict minerals) | May 30, 2024 | — |
| NT 10-K | Filing | Feb 27, 2024 | Dec 29, 2023 |
| NT 10-Q | Filing | Aug 9, 2023 | Jun 30, 2023 |
| SD | Specialized disclosure (conflict minerals) | May 19, 2023 | — |
| UPLOAD | Letter from the SEC | Nov 21, 2022 | — |
| CORRESP | Letter to the SEC | Nov 18, 2022 | — |
| CORRESP | Letter to the SEC | Nov 7, 2022 | — |
| UPLOAD | Letter from the SEC | Oct 26, 2022 | — |
| SD | Specialized disclosure (conflict minerals) | May 27, 2022 | — |
| SD | Specialized disclosure (conflict minerals) | Jan 25, 2022 | — |
| UPLOAD | Letter from the SEC | Jul 31, 2020 | — |
| CORRESP | Letter to the SEC | Jul 29, 2020 | — |
| UPLOAD | Letter from the SEC | Jul 21, 2020 | — |
| SD | Specialized disclosure (conflict minerals) | Jun 1, 2020 | — |
| SD | Specialized disclosure (conflict minerals) | May 30, 2019 | — |
| NT 10-K | Form 10-k | Mar 14, 2019 | Dec 28, 2018 |
| SD | Specialized disclosure (conflict minerals) | May 30, 2018 | — |
| SD | Specialized disclosure (conflict minerals) | May 31, 2017 | — |
| SD | Specialized disclosure (conflict minerals) | May 27, 2016 | — |
| EFFECT | Filing | Mar 2, 2016 | — |
| SD | Specialized disclosure (conflict minerals) | Jun 1, 2015 | — |
| EFFECT | Filing | Mar 4, 2015 | — |
| EFFECT | Filing | Sep 2, 2014 | — |
| SD | Specialized disclosure (conflict minerals) | Jun 2, 2014 | — |
Showing 26 filings. Main filings leave out insider and ownership forms such as Form 4; choose a type above to see them. Each form opens on SEC.gov. Older filings are on SEC EDGAR.
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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.