On January 5, 2022, Bruce C. Rhine, currently a member of the Board of Directors of Onto Innovation Inc. notified the Board of his voluntary decision to retire from the Company's Board and to not stand for re-election at the 2022 Annual Meeting of Stockholders, which is expected to be held in May 2022. Mr. Rhine will continue to serve as a member of the Board until the expiration of his term at the Annual Meeting.