Ultra Clean Holdings, Inc. develops and supplies critical subsystems, components and parts, and ultra-high purity cleaning and analytical services for the semiconductor industry in the United States and internationally. The company provides ultra-clean valves, high purity connectors, industrial process connectors and valves, pneumatic actuators, manifolds and safety solutions, hoses, pressure gauges, and gas line and component heaters; chemical delivery modules that deliver gases and reactive chemicals in a liquid or gaseous form from a centralized subsystem to the reaction chamber; and gas delivery systems, such as weldments, filters, mass flow controllers, regulators, pressure transducers and valves, component heaters, and an integrated electronic and/or pneumatic control system. It also offers various industrial and automation production equipment; fluid delivery systems consist of one or more chemical delivery units, including PFA tubing, filters, flow controllers, regulators, component heaters, and an integrated electronic and/or pneumatic control system; precision robotic systems; top-plate assemblies; frame assemblies; process modules, a subsystem of semiconductor manufacturing tools that process integrated circuits onto wafers; and other high-level assemblies. In addition, the company provides tool chamber parts cleaning and coating services; micro-contamination analysis services for tool parts, wafers and depositions, chemicals, cleanroom materials, deionized water, and airborne molecular contamination; and analytical verification services for process tool chamber part cleaning. It primarily serves original equipment manufacturing customers in the semiconductor capital equipment and semiconductor integrated device manufacturing industries, as well as display, consumer, medical, energy, industrial, and research equipment industries. The company was founded in 1991 and is headquartered in Hayward, California.

HARDING BRIAN E

Palfrey Jamie J.

Cook Christopher S

IBNALE DAVID T

Cho Paul Yoonku

McKibben Jeffrey L.

Ultra Clean Holdings' Chief Human Resources Officer Jamie Palfrey sold 8,691 shares worth approximately $693,000 on May 5, 2026, reducing her direct holdings by 34.57%. The sale occurred as the stock surged 332.47% over the past year, driven by strong semiconductor demand and AI sector enthusiasm. The transaction price of $79.72 was below the market close, and analysts suggest the stock's elevated price-to-sales ratio of 2.0 makes it a good time for current holders to sell, while potential buyers should wait for a price correction.

Ultra Clean's Chief Human Resources Officer Sold 8,691 Company Shares. Here's What That Means for Investors.

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Ultra Clean Holdings Inc (UCTT) Stock Price, Analysis & Trade Signals