# Ultra Clean Holdings, Inc. — DEF 14A

Ultra Clean Holdings, Inc. of HAYWARD, CA filed a DEF 14A with the SEC on 2025-04-28. Industry: Semiconductors & Related Devices.

## Filing

- Filed: 2025-04-28
- Form: DEF 14A
- Accession: 0001140361-25-016015
- Registrant: Ultra Clean Holdings, Inc.
- CIK: 0001275014
- Industry (SIC): Semiconductors & Related Devices (3674)
- State of incorporation: DE
- Location: HAYWARD, CA

## Documents (33)

_Showing 15 of 33 documents._

| Seq | Type | Description |
| --- | --- | --- |
| 1 | DEF 14A | DEF 14A |
| 2 | EX-101.SCH | INLINE XBRL TAXONOMY EXTENSION - SCHEMA |
| 3 | EX-101.DEF | INLINE XBRL TAXONOMY EXTENSION - DEFINITION LINKBASE |
| 4 | GRAPHIC | GRAPHIC |
| 5 | GRAPHIC | GRAPHIC |
| 6 | GRAPHIC | GRAPHIC |
| 7 | GRAPHIC | GRAPHIC |
| 8 | GRAPHIC | GRAPHIC |
| 9 | GRAPHIC | GRAPHIC |
| 10 | GRAPHIC | GRAPHIC |
| 11 | GRAPHIC | GRAPHIC |
| 12 | GRAPHIC | GRAPHIC |
| 13 | GRAPHIC | GRAPHIC |
| 14 | GRAPHIC | GRAPHIC |
| 15 | GRAPHIC | GRAPHIC |

## Filing timeline for this registrant (28)

_Showing 12 of 28 filings._

| Filed | Form |
| --- | --- |
| [2026-04-27](https://search.stillhousedata.com/proxy/0001140361-26-016813) | DEF 14A |
| 2025-04-28 | DEF 14A |
| [2024-04-26](https://search.stillhousedata.com/proxy/0001140361-24-022572) | DEF 14A |
| [2023-05-01](https://search.stillhousedata.com/proxy/0001140361-23-021731) | DEFA14A |
| [2023-04-21](https://search.stillhousedata.com/proxy/0001140361-23-019658) | DEF 14A |
| [2022-04-25](https://search.stillhousedata.com/proxy/0001140361-22-015715) | DEF 14A |
| [2021-04-26](https://search.stillhousedata.com/proxy/0001193125-21-131001) | DEF 14A |
| [2020-05-15](https://search.stillhousedata.com/proxy/0000950103-20-009587) | DEFA14A |
| [2020-04-27](https://search.stillhousedata.com/proxy/0001193125-20-120946) | DEF 14A |
| [2019-04-24](https://search.stillhousedata.com/proxy/0001193125-19-117121) | DEF 14A |
| [2018-04-19](https://search.stillhousedata.com/proxy/0001193125-18-122694) | DEF 14A |
| [2017-04-21](https://search.stillhousedata.com/proxy/0001193125-17-131941) | DEF 14A |

## More

- [CIK 1275014 on SEC EDGAR (source of record)](https://www.sec.gov/cgi-bin/browse-edgar?action=getcompany&CIK=1275014&type=&dateb=&owner=include&count=40)
- [This page as markdown (for LLM agents)](https://search.stillhousedata.com/proxy/0001140361-25-016015.md)
- [Search all SEC filings, advisers and people on Adviser Search](https://search.stillhousedata.com/)

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Source: public SEC filing data via Adviser Search (https://search.stillhousedata.com).
Agents: this data is also queryable via MCP tools and read-only SQL — see https://search.stillhousedata.com/llms.txt.