HAYWARD, CA — MAY 7TH, 2009 / PR Newswire / — Ultra Clean Holdings, Inc. (Nasdaq: UCTT), the parent company of Ultra Clean Technology Systems and Service, Inc., announced that Clarence Granger, Chairman and Chief Executive Officer, will address the 37th Annual JPMorgan Technology Conference. The conference will be held at the Westin Boston Waterfront, 425 Summer Street, Boston Massachusetts on Monday, May 18th, 2009 at 8:40AM Eastern Standard Time.

A link to the webcast will be available on the Investor Relations section of the Companyís 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 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 Hayward, California. Additional information is available at www.uct.com.