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 |
|---|---|---|---|
| 10-Q | Quarterly report | Oct 28, 2026 | Sep 25, 2026 |
| 8-K |
Current report
Results of operations
|
Oct 27, 2026 | Oct 27, 2026 |
| 8-K |
Current report
Officer or director change
|
Sep 30, 2026 | Sep 28, 2026 |
| 8-K |
Current report
Material agreement
|
Aug 14, 2026 | Aug 14, 2026 |
| 424B5 | Prospectus supplement | Aug 14, 2026 | — |
| 8-K |
Current report
Officer or director change
|
Aug 6, 2026 | Aug 4, 2026 |
| 10-Q | Quarterly report | Aug 4, 2026 | Jun 26, 2026 |
| 8-K |
Current report
Results of operations
|
Aug 3, 2026 | Aug 3, 2026 |
| S-8 | Employee stock plan registration | Jul 10, 2026 | — |
| 8-K |
Current report
Officer or director change
|
Jul 8, 2026 | Jul 2, 2026 |
| SD | Specialized disclosure (conflict minerals) | May 26, 2026 | — |
| 8-K |
Current report
Shareholder vote results
|
May 26, 2026 | May 22, 2026 |
| 10-Q/A | Amended quarterly report | May 1, 2026 | Mar 27, 2026 |
| 10-Q | Quarterly report | Apr 29, 2026 | Mar 27, 2026 |
| 8-K | Current report | Apr 28, 2026 | Apr 28, 2026 |
| 8-K | Current report | Apr 28, 2026 | Apr 28, 2026 |
| ARS | Annual report to shareholders | Apr 27, 2026 | Dec 26, 2025 |
| DEF 14A | Proxy statement | Apr 27, 2026 | May 22, 2026 |
| 8-K |
Current report
Material agreement, New debt
|
Apr 24, 2026 | Apr 23, 2026 |
| 8-K |
Current report
Material agreement, New debt, Unregistered share sale
|
Mar 3, 2026 | Feb 26, 2026 |
| 8-K |
Current report
Material agreement, Other events
|
Feb 27, 2026 | Feb 26, 2026 |
| 8-K |
Current report
Other events
|
Feb 25, 2026 | Feb 25, 2026 |
| 10-K | Annual report | Feb 23, 2026 | Dec 26, 2025 |
| 8-K | Current report | Feb 23, 2026 | Feb 23, 2026 |
| 8-K |
Current report
Officer or director change
|
Jan 28, 2026 | Jan 25, 2026 |
| 10-Q | Quarterly report | Oct 29, 2025 | Sep 26, 2025 |
| 8-K |
Current report
Results of operations, Other events
|
Oct 28, 2025 | Oct 23, 2025 |
| 8-K |
Current report
Material agreement, New debt
|
Sep 16, 2025 | Sep 15, 2025 |
| 8-K |
Current report
Officer or director change
|
Aug 7, 2025 | Aug 4, 2025 |
| 10-Q | Quarterly report | Jul 29, 2025 | Jun 27, 2025 |
| 8-K |
Current report
Results of operations
|
Jul 28, 2025 | Jul 28, 2025 |
| 8-K |
Current report
Officer or director change
|
Jun 30, 2025 | Jun 30, 2025 |
| SD | Specialized disclosure (conflict minerals) | May 27, 2025 | — |
| 8-K |
Current report
Shareholder vote results
|
May 27, 2025 | May 21, 2025 |
| 10-Q | Quarterly report | Apr 29, 2025 | Mar 28, 2025 |
| 8-K |
Current report
Results of operations
|
Apr 28, 2025 | Apr 28, 2025 |
| ARS | Annual report to shareholders | Apr 28, 2025 | Dec 27, 2024 |
| DEF 14A | Proxy statement | Apr 28, 2025 | May 21, 2025 |
| 8-K |
Current report
Officer or director change
|
Mar 5, 2025 | Mar 5, 2025 |
| 10-K | Annual report | Feb 25, 2025 | Dec 27, 2024 |
| 8-K |
Current report
Results of operations
|
Feb 24, 2025 | Feb 24, 2025 |
| 10-Q/A | Amended quarterly report | Feb 11, 2025 | Sep 27, 2024 |
| 10-Q/A | Amended quarterly report | Feb 11, 2025 | Mar 29, 2024 |
| 8-K |
Current report
Officer or director change
|
Jan 31, 2025 | Jan 30, 2025 |
| 10-Q | Quarterly report | Oct 30, 2024 | Sep 27, 2024 |
| 8-K |
Current report
Results of operations
|
Oct 28, 2024 | Oct 28, 2024 |
| 8-K |
Current report
Material agreement, New debt
|
Oct 10, 2024 | Oct 8, 2024 |
| 10-Q | Quarterly report | Jul 26, 2024 | Jun 28, 2024 |
| 8-K | Current report | Jul 25, 2024 | Jul 25, 2024 |
| SD | Specialized disclosure (conflict minerals) | May 30, 2024 | — |
| 8-K |
Current report
Shareholder vote results
|
May 28, 2024 | May 22, 2024 |
| 8-K |
Current report
Officer or director change
|
May 15, 2024 | May 14, 2024 |
| 10-Q | Quarterly report | May 6, 2024 | Mar 29, 2024 |
| 8-K | Current report | May 6, 2024 | May 6, 2024 |
| ARS | Annual report to shareholders | Apr 26, 2024 | Dec 29, 2023 |
| DEF 14A | Proxy statement | Apr 26, 2024 | May 22, 2024 |
| 8-K |
Current report
Material agreement, New debt
|
Apr 9, 2024 | Apr 4, 2024 |
| S-3ASR | Automatic shelf registration | Mar 25, 2024 | — |
| S-8 | Employee stock plan registration | Mar 20, 2024 | — |
| 8-K |
Current report
Auditor change
|
Mar 8, 2024 | Mar 6, 2024 |
| 10-K | Annual report | Mar 6, 2024 | Dec 29, 2023 |
| NT 10-K | Filing | Feb 27, 2024 | Dec 29, 2023 |
| 8-K | Current report | Feb 21, 2024 | Feb 21, 2024 |
| 10-Q | Quarterly report | Nov 7, 2023 | Sep 29, 2023 |
| 8-K |
Current report
Officer or director change
|
Nov 1, 2023 | Oct 30, 2023 |
| 8-K | Current report | Oct 31, 2023 | Oct 25, 2023 |
| 8-K | Current report | Oct 25, 2023 | Oct 25, 2023 |
| 8-K | Current report | Oct 23, 2023 | Oct 23, 2023 |
| 10-Q | Quarterly report | Aug 11, 2023 | Jun 30, 2023 |
| NT 10-Q | Filing | Aug 9, 2023 | Jun 30, 2023 |
| 8-K |
Current report
Material agreement, New debt
|
Aug 1, 2023 | Jul 31, 2023 |
| 8-K |
Current report
Results of operations
|
Jul 27, 2023 | Jul 27, 2023 |
| 8-K |
Current report
Material agreement
|
Jul 6, 2023 | Jul 6, 2023 |
| SD | Specialized disclosure (conflict minerals) | May 19, 2023 | — |
| 8-K |
Current report
Shareholder vote results
|
May 18, 2023 | May 17, 2023 |
| 10-Q | Quarterly report | May 5, 2023 | Mar 31, 2023 |
| DEFA14A | Additional proxy material | May 1, 2023 | — |
| 8-K |
Current report
Results of operations
|
Apr 26, 2023 | Apr 26, 2023 |
| ARS | Annual report to shareholders | Apr 21, 2023 | Dec 30, 2022 |
| DEF 14A | Proxy statement | Apr 21, 2023 | — |
| 10-K | Annual report | Feb 28, 2023 | Dec 30, 2022 |
| 8-K |
Current report
Results of operations
|
Feb 22, 2023 | Feb 22, 2023 |
| 8-K |
Current report
Other events
|
Jan 9, 2023 | Jan 9, 2023 |
| UPLOAD | Letter from the SEC | Nov 21, 2022 | — |
| CORRESP | Letter to the SEC | Nov 18, 2022 | — |
| 10-Q | Quarterly report | Nov 9, 2022 | Sep 30, 2022 |
| CORRESP | Letter to the SEC | Nov 7, 2022 | — |
| 8-K |
Current report
Results of operations, Other events
|
Oct 26, 2022 | Oct 20, 2022 |
| UPLOAD | Letter from the SEC | Oct 26, 2022 | — |
| 8-K |
Current report
Officer or director change
|
Oct 13, 2022 | Oct 10, 2022 |
| 8-K/A |
Amended current report
Material agreement, New debt
|
Aug 29, 2022 | Aug 19, 2022 |
| 8-K |
Current report
Material agreement, New debt
|
Aug 24, 2022 | Aug 19, 2022 |
| 10-Q | Quarterly report | Aug 9, 2022 | Jul 1, 2022 |
| 8-K |
Current report
Results of operations
|
Jul 28, 2022 | Jul 28, 2022 |
| 8-K |
Current report
Officer or director change
|
Jun 27, 2022 | Jun 23, 2022 |
| SD | Specialized disclosure (conflict minerals) | May 27, 2022 | — |
| 8-K |
Current report
Shareholder vote results
|
May 20, 2022 | May 19, 2022 |
| 8-K |
Current report
Officer or director change
|
May 18, 2022 | May 16, 2022 |
| 10-Q | Quarterly report | May 10, 2022 | Apr 1, 2022 |
| 8-K |
Current report
Officer or director change
|
May 4, 2022 | Apr 29, 2022 |
| 8-K |
Current report
Results of operations
|
Apr 27, 2022 | Apr 27, 2022 |
| 8-K |
Current report
Officer or director change
|
Apr 25, 2022 | Apr 22, 2022 |
| DEF 14A | Proxy statement | Apr 25, 2022 | May 19, 2022 |
| 8-K |
Current report
Other events
|
Apr 11, 2022 | Apr 11, 2022 |
| 10-K | Annual report | Mar 1, 2022 | Dec 31, 2021 |
| 8-K |
Current report
Results of operations
|
Feb 23, 2022 | Feb 23, 2022 |
| SD | Specialized disclosure (conflict minerals) | Jan 25, 2022 | — |
| 10-Q | Quarterly report | Nov 3, 2021 | Sep 24, 2021 |
| 8-K |
Current report
Results of operations
|
Oct 27, 2021 | Oct 27, 2021 |
| 10-Q | Quarterly report | Aug 4, 2021 | Jun 25, 2021 |
| 8-K |
Current report
Results of operations
|
Aug 2, 2021 | Aug 2, 2021 |
| 8-K/A | Amended current report | Jun 14, 2021 | Mar 31, 2021 |
| 8-K |
Current report
Shareholder vote results
|
May 24, 2021 | May 20, 2021 |
| 10-Q | Quarterly report | May 5, 2021 | Mar 26, 2021 |
| 8-K |
Current report
Other events
|
May 3, 2021 | May 3, 2021 |
| 8-K |
Current report
Officer or director change
|
Apr 28, 2021 | Apr 22, 2021 |
| 8-K |
Current report
Results of operations
|
Apr 28, 2021 | Apr 28, 2021 |
| DEF 14A | Proxy statement | Apr 26, 2021 | May 20, 2021 |
| 8-K |
Current report
Material agreement
|
Apr 13, 2021 | Apr 8, 2021 |
| 424B5 | Prospectus supplement | Apr 9, 2021 | — |
| 424B5 | Prospectus supplement | Apr 5, 2021 | — |
| S-3ASR | Automatic shelf registration | Apr 5, 2021 | — |
| 8-K |
Current report
Material agreement, Acquisition or sale of assets, New debt, Other events
|
Apr 5, 2021 | Mar 31, 2021 |
| 10-K | Annual report | Feb 23, 2021 | Dec 25, 2020 |
| 8-K |
Current report
Regulation FD disclosure
|
Feb 22, 2021 | Feb 22, 2021 |
| 8-K |
Current report
Results of operations
|
Feb 17, 2021 | Feb 17, 2021 |
| 8-K |
Current report
Material agreement, Results of operations, Other events
|
Dec 17, 2020 | Dec 16, 2020 |
| 10-Q | Quarterly report | Nov 4, 2020 | Sep 25, 2020 |
| 8-K |
Current report
Results of operations
|
Oct 28, 2020 | Oct 28, 2020 |
| 10-Q | Quarterly report | Aug 3, 2020 | Jun 26, 2020 |
| UPLOAD | Letter from the SEC | Jul 31, 2020 | — |
| CORRESP | Letter to the SEC | Jul 29, 2020 | — |
| 8-K |
Current report
Results of operations
|
Jul 29, 2020 | Jul 29, 2020 |
| UPLOAD | Letter from the SEC | Jul 21, 2020 | — |
| 8-K |
Current report
Shareholder vote results
|
Jun 3, 2020 | Jun 2, 2020 |
| SD | Specialized disclosure (conflict minerals) | Jun 1, 2020 | — |
| DEFA14A | Additional proxy material | May 15, 2020 | — |
| 10-Q | Quarterly report | May 6, 2020 | Mar 27, 2020 |
| 8-K |
Current report
Results of operations
|
Apr 29, 2020 | Apr 29, 2020 |
| DEF 14A | Proxy statement | Apr 27, 2020 | Jun 2, 2020 |
| 10-K | Annual report | Mar 11, 2020 | Dec 27, 2019 |
| 8-K |
Current report
Results of operations
|
Feb 19, 2020 | Feb 19, 2020 |
| 8-K |
Current report
Officer or director change
|
Dec 23, 2019 | Dec 17, 2019 |
| S-8 | Employee stock plan registration | Dec 18, 2019 | — |
| 10-Q | Quarterly report | Nov 5, 2019 | Sep 27, 2019 |
| 8-K |
Current report
Results of operations
|
Oct 30, 2019 | Oct 30, 2019 |
| 10-Q | Quarterly report | Aug 7, 2019 | Jun 28, 2019 |
| 8-K |
Current report
Results of operations
|
Jul 31, 2019 | Jul 31, 2019 |
| 8-K |
Current report
Officer or director change
|
Jun 5, 2019 | May 30, 2019 |
| SD | Specialized disclosure (conflict minerals) | May 30, 2019 | — |
| 8-K |
Current report
Officer or director change
|
May 29, 2019 | May 28, 2019 |
| 8-K |
Current report
Officer or director change, Shareholder vote results
|
May 24, 2019 | May 23, 2019 |
| 10-Q | Quarterly report | May 8, 2019 | Mar 29, 2019 |
| 8-K |
Current report
Results of operations
|
May 2, 2019 | May 2, 2019 |
| DEF 14A | Proxy statement | Apr 24, 2019 | May 23, 2019 |
| 8-K |
Current report
Officer or director change, Other events
|
Mar 28, 2019 | Mar 25, 2019 |
| 10-K | Annual report | Mar 22, 2019 | Dec 28, 2018 |
| NT 10-K | Form 10-k | Mar 14, 2019 | Dec 28, 2018 |
| 8-K |
Current report
Results of operations
|
Feb 21, 2019 | Feb 21, 2019 |
| 10-Q | Quarterly report | Nov 7, 2018 | Sep 28, 2018 |
| 8-K/A | Amended current report | Nov 6, 2018 | Aug 27, 2018 |
| 8-K |
Current report
Results of operations
|
Nov 6, 2018 | Nov 6, 2018 |
| 8-K |
Current report
Officer or director change
|
Nov 1, 2018 | Oct 26, 2018 |
| 8-K |
Current report
Material agreement, New debt, Other events
|
Oct 4, 2018 | Oct 1, 2018 |
| 8-K |
Current report
Regulation FD disclosure
|
Sep 5, 2018 | Sep 5, 2018 |
| 8-K |
Current report
Material agreement, Agreement ended, Acquisition or sale of assets, New debt, Other events
|
Aug 31, 2018 | Aug 27, 2018 |
| 10-Q | Quarterly report | Aug 8, 2018 | Jun 29, 2018 |
| 8-K |
Current report
Results of operations
|
Jul 26, 2018 | Jul 26, 2018 |
| 8-K |
Current report
Material agreement, Other events
|
Jul 25, 2018 | Jul 24, 2018 |
| 8-K |
Current report
Officer or director change
|
Jun 6, 2018 | Jun 1, 2018 |
| 8-K |
Current report
Officer or director change
|
Jun 1, 2018 | Jun 1, 2018 |
| SD | Specialized disclosure (conflict minerals) | May 30, 2018 | — |
| 8-K |
Current report
Shareholder vote results
|
May 17, 2018 | May 15, 2018 |
| 10-Q | Quarterly report | May 9, 2018 | Mar 30, 2018 |
| 8-K |
Current report
Results of operations
|
Apr 25, 2018 | Apr 25, 2018 |
| DEF 14A | Proxy statement | Apr 19, 2018 | May 15, 2018 |
| 8-K |
Current report
Officer or director change
|
Apr 2, 2018 | Mar 29, 2018 |
| 10-K | Annual report | Mar 14, 2018 | Dec 29, 2017 |
| 8-K |
Current report
Results of operations
|
Feb 21, 2018 | Feb 21, 2018 |
| 8-K |
Current report
Officer or director change
|
Feb 12, 2018 | Feb 6, 2018 |
| 8-K |
Current report
Material agreement
|
Feb 2, 2018 | Jan 30, 2018 |
| 424B5 | Prospectus supplement | Jan 31, 2018 | — |
| 424B5 | Prospectus supplement | Jan 29, 2018 | — |
| 8-K |
Current report
Other events
|
Jan 29, 2018 | Jan 29, 2018 |
| 8-K |
Current report
Results of operations
|
Jan 16, 2018 | Jan 16, 2018 |
| S-3ASR | Automatic shelf registration | Jan 5, 2018 | — |
| 8-K |
Current report
Officer or director change
|
Nov 15, 2017 | Nov 13, 2017 |
| 10-Q | Quarterly report | Nov 8, 2017 | Sep 29, 2017 |
| 8-K |
Current report
Results of operations
|
Oct 25, 2017 | Oct 25, 2017 |
| 8-K |
Current report
Officer or director change, Regulation FD disclosure
|
Oct 2, 2017 | Oct 2, 2017 |
| 10-Q | Quarterly report | Aug 9, 2017 | Jun 30, 2017 |
| 8-K |
Current report
Results of operations, Officer or director change
|
Jul 27, 2017 | Jul 27, 2017 |
| S-8 | Employee stock plan registration | Jul 25, 2017 | — |
| SD | Specialized disclosure (conflict minerals) | May 31, 2017 | — |
| 8-K |
Current report
Shareholder vote results
|
May 30, 2017 | May 24, 2017 |
| 10-Q | Quarterly report | May 10, 2017 | Mar 31, 2017 |
| 8-K |
Current report
Results of operations
|
Apr 26, 2017 | Feb 26, 2017 |
| DEF 14A | Proxy statement | Apr 21, 2017 | May 24, 2017 |
| 10-K | Annual report | Mar 15, 2017 | Dec 30, 2016 |
| 8-K |
Current report
Results of operations
|
Feb 22, 2017 | Feb 22, 2017 |
Showing 200 filings, the most recent 200. 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.