12.02.09

ULTRA CLEAN TO PRESENT AT THE BARCLAYS CAPITAL TECHNOLOGY CONFERENCE

HAYWARD, CA — DECEMBER 2, 2009 / PR Newswire / — Ultra Clean Holdings, Inc. (Nasdaq: UCTT), a leading developer and supplier of critical subsystems for the semiconductor capital equipment, medical device, research, flat panel and solar industries, announced that Clarence Granger, Chairman and Chief Executive Officer, and Casey Eichler, Chief Financial Officer, will address the Barclays Capital Technology Conference. The conference will be held at the Fairmont San Francisco 950 Mason Street San Francisco, California on Tuesday, December 8th, 2009 at 9:30AM Pacific 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 developer and supplier of critical subsystems for the semiconductor capital equipment, flat panel, solar and medical device 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, solar and medical device industries. Ultra Clean is headquartered in Hayward, California. Additional information is available at www.uct.com.