ONTO · Onto Innovation Inc.

Onto Innovation Inc. (NYSE: ONTO) will release its 2025 fourth quarter and full year results shortly after the market closes on February 19, 2026. Onto Innovation will host a conference call and audio webcast in connection with its release of the financial results. Michael P. Plisinski, chief executive officer, and Brian Roberts, chief financial officer, will host the call. The call will take place: Thursday, February 19, 2026, at 4:30 p.m. (ET) To participate in the call, please dial (800) 330-6710 or international: +1 (646) 646 769-9200 and reference conference ID 5073025 at least five (5) minutes prior to the scheduled start time. A live webcast will also be available on the Company’s website at www.ontoinnovation.com . To listen to the live webcast, please go to the website at least 15 minutes early to register, download and install any necessary audio software. There will be a replay of the conference call available for one year on the Company’s website at www.ontoinnovation.com

Onto Innovation Inc. (NYSE: ONTO) (“Onto Innovation,” “Onto,” or the “Company”) today announced that Michael Plisinski, chief executive officer, and Brian Roberts, chief financial officer, will participate in the upcoming 28 th Annual Needham Growth Conference, taking place at the Lotte New York Palace Hotel on January 13-14, 2026. Michael Plisinski will participate in a “fireside chat” at 11:45 a.m. ET on Tuesday, January 13. Investors are invited to join the live webcast of the presentation, which can be accessed on the Company’s website at investors.ontoinnovation.com . Onto Innovation will be accessible for one-on-one meetings on January 13 and 14. Any material utilized for the conference, as well as the archived webcast of the presentation, will be made available for one year on the investor relations page of Onto’s website at investors.ontoinnovation.com . To schedule a meeting, please contact your Needham salesperson. About Onto Innovation Inc. Onto Innovation is a leader in