Onto Innovation is trading at $230.00, up +4.21%, with no verified direct catalyst for its pre-market gain. - No company-specific announcement surfaced on October 19; the company’s latest listed news was dated October 12. - Shares closed at $220.70 on October 16, following a steep recent decline. - U.S. futures are higher and may support a rebound; recent semiconductor selling pressure is part of the backdrop, not a clear explanation.