Ultra Clean Holdings, Inc. is a leading developer and supplier of critical subsystems, components, parts, and ultra-high purity cleaning and analytical services, primarily serving the semiconductor industry. The company operates through two main divisions: Products and Services. The Products division delivers integrated outsourced solutions for major subassemblies, offering design-to-delivery cycle optimization, design for manufacturability services, prototyping, and high-precision manufacturing capabilities. The Services division provides tool chamber parts cleaning and coating, along with micro-contamination analytical services, including contamination analysis for tool parts, wafers, chemicals, and cleanroom materials. Ultra Clean Holdings supplies ultra-clean valves, high purity connectors, pneumatic actuators, manifolds, gas delivery systems, fluid delivery modules, and precision robotic systems to semiconductor capital equipment manufacturers and integrated device manufacturers. The company also serves broader industries including display, consumer, medical, energy, industrial, and research equipment sectors. Founded in 1991 and headquartered in Hayward, California, Ultra Clean Holdings plays a vital role in enabling advanced semiconductor manufacturing and equipment optimization.