Company filings profile · CIK 0001275014
Ultra Clean Holdings, Inc. — SEC filings & insider activity.
Real, source-linked SEC EDGAR activity for Ultra Clean Holdings, Inc. (UCTT): 15 filings in the last 90 days vs 59 in the prior 90 (filing-velocity cooling ↓ · 0.25×). Latest material 8-K events, insider Form-4 transactions, and periodic reports — monitored for change.
✔ Verified against the public SEC EDGAR filing record as of Oct 1, 2026. Source-linked, daily-refreshed.
Material 8-K events — Ultra Clean Holdings, Inc.
8-K disclosures decoded by item code (the material events: agreements, results, control/management changes, impairments, restatements).
| Filed | Event | |
|---|---|---|
| Sep 30, 2026 | Departure/Election of Directors or Officers | ↗ |
| Aug 14, 2026 | Entry into a Material Agreement; Financial Statements and Exhibits | ↗ |
| Aug 6, 2026 | Departure/Election of Directors or Officers; Financial Statements and Exhibits | ↗ |
| Aug 3, 2026 | Results of Operations (earnings); Financial Statements and Exhibits | ↗ |
| Jul 8, 2026 | Departure/Election of Directors or Officers; Financial Statements and Exhibits | ↗ |
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Insider transactions (Form 4 / 3 / 5)
Recent filings
| Filed | Form | Detail | |
|---|---|---|---|
| Sep 30, 2026 | 8-K | Departure/Election of Directors or Officers | ↗ |
| Sep 4, 2026 | 4 | FORM 4 | ↗ |
| Sep 4, 2026 | 3 | FORM 3 | ↗ |
| Sep 2, 2026 | 4 | FORM 4 | ↗ |
| Aug 14, 2026 | 8-K | Entry into a Material Agreement; Financial Statements and Exhibits | ↗ |
| Aug 14, 2026 | 424B5 | FORM 424B5 | ↗ |
| Aug 13, 2026 | SCHEDULE 13G | ↗ | |
| Aug 12, 2026 | SCHEDULE 13G | ↗ | |
| Aug 6, 2026 | 8-K | Departure/Election of Directors or Officers; Financial Statements and Exhibits | ↗ |
| Aug 4, 2026 | 10-Q | 10-Q | ↗ |
| Aug 3, 2026 | 8-K | Results of Operations (earnings); Financial Statements and Exhibits | ↗ |
| Jul 31, 2026 | SCHEDULE 13G | ↗ | |
| Jul 10, 2026 | S-8 | FORM S-8 | ↗ |
| Jul 8, 2026 | 8-K | Departure/Election of Directors or Officers; Financial Statements and Exhibits | ↗ |
| Jul 7, 2026 | 4 | FORM 4 | ↗ |
| Jul 2, 2026 | 144 | ↗ | |
| Jun 30, 2026 | 4 | FORM 4 | ↗ |
| Jun 9, 2026 | 4 | FORM 4 | ↗ |
| Jun 9, 2026 | 4 | FORM 4 | ↗ |
| Jun 8, 2026 | 4 | FORM 4 | ↗ |
| Jun 4, 2026 | 4 | FORM 4 | ↗ |
| Jun 4, 2026 | 144 | ↗ | |
| Jun 4, 2026 | 144 | ↗ | |
| Jun 2, 2026 | 144 | ↗ | |
| May 27, 2026 | 4 | FORM 4 | ↗ |
| May 27, 2026 | 4 | FORM 4 | ↗ |
| May 27, 2026 | 4 | FORM 4 | ↗ |
| May 27, 2026 | 4 | FORM 4 | ↗ |
| May 27, 2026 | 4 | FORM 4 | ↗ |
| May 27, 2026 | 4 | FORM 4 | ↗ |
| May 27, 2026 | 4 | FORM 4 | ↗ |
| May 27, 2026 | 4 | FORM 4 | ↗ |
| May 27, 2026 | 4 | FORM 4 | ↗ |
| May 27, 2026 | 4 | FORM 4 | ↗ |
| May 27, 2026 | 4 | FORM 4 | ↗ |
| May 27, 2026 | 4 | FORM 4 | ↗ |
| May 27, 2026 | 4 | FORM 4 | ↗ |
| May 27, 2026 | 4 | FORM 4 | ↗ |
| May 27, 2026 | 4 | FORM 4 | ↗ |
| May 27, 2026 | 4 | FORM 4 | ↗ |