On January 8, 2024, Karen M. Rogge, currently a member of the Board of Directors of Onto Innovation Inc. (Company), notified the Board of her voluntary decision to retire from the Company?s Board and to not stand for re-election at the 2024 Annual Meeting of Stockholders, which is expected to be held in May 2024. Ms. Rogge will continue to serve as a member of the Board until the expiration of her term at the Annual Meeting.