Ultra Clean Holdings is trading 7.67% higher at $55.43 on October 28, after record third-quarter revenue of $759 million and non-GAAP EPS of $1.15, both above expectations. - Fourth-quarter revenue guidance of $800 million to $860 million exceeded analyst forecasts; management cited demand tied to AI infrastructure and advanced packaging. - Semiconductor-sector strength may add support, but supplied index changes were modest; current trading volume was unavailable in the reviewed sources.