06.01.10

ULTRA CLEAN TO PRESENT AT THE UBS GLOBAL TECHNOLOGY & SERVICE CONFERENCE

HAYWARD, CA — June 1, 2010 (PR Newswire)  — Ultra Clean Holdings, Inc. (Nasdaq: UCTT), a leading outsource solution provider for a variety of complex modules ranging from liquid & gas delivery systems to turnkey system integration for the semiconductor capital equipment, medical device, research, flat panel, and energy industries, announced that Clarence Granger, Chairman and Chief Executive Officer, and Casey Eichler, Chief Financial Officer, will address the UBS Global Technology and Services Conference. The presentation will take place at the Crowne Plaza Times Square Hotel in New York City June 9th, 2010 at 9:00AM Eastern Standard 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 approximately one hour after the live presentation.

About Ultra Clean Holdings, Inc.
Ultra Clean Holdings, Inc. is a leading developer and supplier of critical subsystems for the semiconductor capital equipment, flat panel, medical, energy and research industries. 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 for the semiconductor capital equipment, flat panel, medical, energy and research industries. Ultra Clean is headquartered in Hayward, California. Additional information is available at www.uct.com

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