MENLO PARK, CA, FEBRUARY 5, 2008 / PRNewswirre / — Ultra Clean Holdings, Inc. (Nasdaq: UCTT), will release fourth quarter 2007 financial results at 2:00 pm PST on Tuesday, February 19, 2008. The call-in number is 800/909-4145 (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 21373680 (all callers).