06.26.07

Ultra Clean Technology to Webcast Investor Presentation
on July 18, 2007

MENLO PARK, CA — (PRNewswire) — JUNE 26, 2007 9:00 a.m. EDT / — Ultra Clean Holdings, Inc. (Nasdaq:  UCTT), today announced that it will webcast its presentation to analysts and investors, from San Francisco, California on Wednesday, July 18, 2007 at 12:00 p.m. Pacific Daylight Time.

A link to the webcast will be available on the Investor Relations section of the Company’s website at www.uct.com during the live presentation. A replay of the webcast will be available after the live presentation.

Analysts or investors who wish to attend the presentation should register at the following URL, starting on June 28, 2007, on the Investor Calendar page.

Additionally, Ultra Clean Technology will be presenting at the Fifth Annual JPMorgan SEMIcon West Investor Mini-conference on July 17, 2007 at 10:25 a.m. Pacific Daylight Time.

About Ultra Clean Holdings, Inc.
Ultra Clean Holdings, Inc. is a developer and supplier of critical subsystems for the semiconductor capital equipment industry. Ultra Clean offers its customers an integrated outsourced solution for gas delivery systems and other subassemblies, improved design-to-delivery cycle times, component neutral design and manufacturing and component testing capabilities. Ultra Clean's customers are primarily original equipment manufacturers of semiconductor capital equipment. Ultra Clean is headquartered in Menlo Park, California. Additional information is available at www.uct.com.