Ultra Clean Holdings is trading 4.54% up at $84.74 in pre-market on October 1, 2026, with semiconductor strength a plausible backdrop, not a confirmed catalyst. - Micron’s results and outlook supported Asian technology and semiconductor shares; Nasdaq futures rose 0.75%. - The company announced September 30 that former National Instruments CEO Alexander Davern joined its board effective September 28; coverage says direct stock impact is unlikely. - UCTT’s pre-market volume or trading activity level was unavailable.