Edit Symbol List
Don't know the stock symbol? Use the symbol lookup tool.
Alphabetize the sort order of my symbols
Company Description (as filed with the SEC)
Ultra Clean Holdings, Inc. (Ultra Clean) was founded in November 2002 for the purpose of acquiring Ultra Clean Technology Systems and Service Inc. Ultra Clean Technology Systems and Service, Inc. was founded in 1991 by Mitsubishi Corporation and was operated as a subsidiary of Mitsubishi until November 2002, when it was acquired by Ultra Clean. Ultra Clean became a publicly traded company in March 2004. In June 2006, we completed the acquisition of Sieger Engineering, Inc. to better enhance our position as a subsystem supplier to the semiconductor, research, flat panel, energy and medical equipment industries. Ultra Clean Technology (Shanghai) Co., Ltd and Ultra Clean Micro-Electronics Equipment (Shanghai) Co., Ltd. were established in 2005 and 2007, respectively, to facilitate our operations in China. Ultra Clean Asia Pacific, Pte, Ltd. (Singapore), was established in fiscal year 2008 to facilitate our operations in Singapore. ... More ...