🟢 Onto Innovation is trading 4.31% up in after-hours trading on October 20, 2026

Onto Innovation is trading 4.31% higher at $229.00 in after-hours on October 20, 2026; no clear company-specific announcement explaining the rise surfaced in available reporting.

• The regular session closed at $219.53.
• Recent coverage describes fragile semiconductor sentiment and investor concerns about the financing and returns of AI infrastructure spending, rather than a new company catalyst.
• That context may help explain the session’s weakness, but does not establish why the after-hours price moved higher.