Ultra Clean Stock Falls Premarket on Insider Sale as AI Rally Faces Scrutiny
Ultra Clean Holdings shares slipped in premarket Nasdaq trading Wednesday. A fresh SEC Form 4 showed CIO Jeffrey L. McKibben unloaded 4,205 shares at $87 on May 14. After selling, he kept 11,349 shares, according to the filing. The stock was quoted at $76.98 just after 9 a.m. EDT, down 0.9% from its last close. The timing pushed the small filing into a spot where it stood out. Wednesday counted as a U.S. trading day, but regular Nasdaq hours hadn't started yet; core stock-market trading runs from 9:30 a.m. to 4 p.m. ET, and action before the bell is premarket, where liquidity can dry up and prices move with less conviction.