Company facts
- Industry
- Semiconductors & Related Devices
- Headquarters
- Hayward, California
- Most recent report
- 8-K, filed Sep 30, 2026
- Incorporated
- Delaware
- Filings on record
- 1,000+ filings
- On EDGAR
- CIK 1275014
- Fiscal year ends
- December
- Filer status
- Large accelerated filer
Financials 8 of 53
News 8 of 140
- 8-K Leadership change Sep 30, 2026
- 8-K Significant contract Aug 14, 2026
- 8-K Leadership change Aug 6, 2026
- 8-K Quarterly results Aug 3, 2026
- 8-K Leadership change Jul 8, 2026
- 8-K Shareholder vote results May 26, 2026
- 8-K Current report on a material event Apr 28, 2026
- 8-K Current report on a material event Apr 28, 2026
Prospectuses and Registrations 8 of 16
- 424B5 Prospectus supplement for an offering Aug 14, 2026
- S-8 Registration statement for an employee plan Jul 10, 2026
- S-3ASR Automatic shelf registration Mar 25, 2024
- S-8 Registration statement for an employee plan Mar 20, 2024
- 424B5 Prospectus supplement for an offering Apr 9, 2021
- 424B5 Prospectus supplement for an offering Apr 5, 2021
- S-3ASR Automatic shelf registration Apr 5, 2021
- S-8 Registration statement for an employee plan Dec 18, 2019
Proxies 8 of 15
- DEF 14A Proxy statement for a shareholder vote Apr 27, 2026
- DEF 14A Proxy statement for a shareholder vote Apr 28, 2025
- DEF 14A Proxy statement for a shareholder vote Apr 26, 2024
- DEFA14A Extra proxy material May 1, 2023
- DEF 14A Proxy statement for a shareholder vote Apr 21, 2023
- DEF 14A Proxy statement for a shareholder vote Apr 25, 2022
- DEF 14A Proxy statement for a shareholder vote Apr 26, 2021
- DEFA14A Extra proxy material May 15, 2020
Ownership 8 of 745
- 4 Insider reported a trade Oct 2, 2026
- 3 Insider reported their initial holding Oct 2, 2026
- 4 Insider reported a trade Sep 4, 2026
- 3 Insider reported their initial holding Sep 4, 2026
- 4 Insider reported a trade Sep 2, 2026
- SCHEDULE 13G Large holder reported a passive stake Aug 13, 2026
- SCHEDULE 13G Large holder reported a passive stake Aug 12, 2026
- SCHEDULE 13G Large holder reported a passive stake Jul 31, 2026
Other 8 of 31
- SD Conflict minerals disclosure May 26, 2026
- ARS Annual report sent to shareholders Apr 27, 2026
- SD Conflict minerals disclosure May 27, 2025
- ARS Annual report sent to shareholders Apr 28, 2025
- SD Conflict minerals disclosure May 30, 2024
- ARS Annual report sent to shareholders Apr 26, 2024
- NT 10-K Notice that an annual report will be late Feb 27, 2024
- NT 10-Q Notice that a quarterly report will be late Aug 9, 2023
Everything here comes from Ultra Clean Holdings, Inc.'s own filings on SEC EDGAR. The filing list is rechecked every hour.