MENLO PARK, CA, JULY 9, 2007 / PRNewswire — Ultra Clean Holdings, Inc. (Nasdaq: UCTT), the parent company of Ultra Clean Technology Systems and Service, Inc., will release second quarter 2007 financial results on Monday, July 23, 2007 after markets close.

The Company will host a conference call to discuss second quarter 2007 financial results and management's outlook at 2:00 pm PST on Monday, July 23, 2007. The call-in number is 800/952-6697 (domestic) and 212/231-2900 (international). A replay of the conference will be available for fourteen days following the call at 800/633-8284 (domestic) and 402/977-9140 (international). Confirmation number for live broadcast and replay is 21342392 (all callers). 

Ultra Clean will also webcast the conference call live on our website at www.uct.com under Investor Relations.