Ultra Clean Holdings, Inc.

Ultra Clean Holdings, Inc. is a leading developer and supplier of critical subsystems, components, parts, and ultra-high purity cleaning and analytical services, primarily for the semiconductor industry. The company's mission is to deliver comprehensive, integrated solutions and an unparalleled service experience to its customers, with a vision to be the premier supplier of performance solutions for the semiconductor, display, and life science industries. Headquartered in Hayward, California, Ultra Clean Holdings, Inc. was founded in 1991.

Under its Products division, Ultra Clean Holdings offers integrated outsourced solutions for major subassemblies, including gas delivery systems, chemical delivery systems, precision fabrication services, and various modules like vacuum frames and weldments. Its Services division provides tool chamber parts cleaning and coating, micro-contamination analytical services, refurbishment, and protective coatings. While primarily serving the semiconductor industry, the company also caters to display, consumer, medical, energy, industrial, and research equipment sectors.

Recent leadership changes include James Xiao, who joined as CEO and Director in September 2025, and Robert Wunar, appointed Chief Operating Officer in March 2026. Sheri Savage, the CFO, announced her retirement effective April 2026, and Clarence Granger stepped down as Chairman of the Board in May 2026, succeeded by Tom Edman. Ultra Clean Holdings maintains a leading position in gas delivery and ultra-high purity cleaning for semiconductors, with its growth closely tied to advanced nodes and specialty memory demand. The company recently priced an upsized $525.0 million convertible senior notes offering in February 2026, and S&P Global Ratings upgraded its revolver to 'BB' in May 2026.