Onto Innovation Inc. (NYSE: ONTO) today announced management’s participation in the 10^th Annual December CEO Summit, scheduled for December 8, 2021, at the St. Regis hotel, San Francisco, California. The conference is being held concurrently with SEMICON^® West 2021 and is an in-person event.

The presentation material utilized for the CEO Summit will be made available on the investor relations page of the Company’s website at https://investors.ontoinnovation.com/.

About The 10^th Annual December CEO Summit 2021

The December CEO Summit is collectively hosted by the executive management teams from 11 participating companies and features a “round-robin” format consisting of small group meetings.

Held concurrently with SEMICON West in San Francisco, this CEO Summit is a live event. The St. Regis hotel, SEMICON West, and therefore the CEO Summit, all require proof of COVID-19 vaccination in order to register and attend events in person.

The 11 management teams currently confirmed to host the December 2021 CEO Summit are: ACM Research (ACMR), Aehr Test (AEHR), Alpha & Omega Semiconductor (AOSL), Axcelis (ACLS), Cohu (COHU), Ichor Systems (ICHR), inTEST Corporation (INTT), Kulicke & Soffa (KLIC), Onto Innovation (ONTO), Pivotal Systems (PVS.AX), and Revasum (RVS.AX).

The CEO Summit is by invitation only and is open to accredited investors and publishing research analysts. Please RSVP early, given the logistical considerations of live event registration this year, as well as space limitations. Hosts reserve the right to limit attendance as necessary. Last day for registration is November 29, 2021.

RSVP Contacts for 10th Annual December CEO Summit

To RSVP for the CEO Summit, please contact either of the Summit’s co-chairs.

Laura J. Guerrant-Oiye

CEO Summit Co-Chair

Phone: (508) 826-4573

Email: loiye@aerogel.com

Claire E. McAdams

Headgate Partners LLC

Phone: (530) 265-9899

Email: claire@headgatepartners.com

About Onto Innovation Inc.

Onto Innovation is a leader in process control, combining global scale with an expanded portfolio of leading-edge technologies, which include: Un-patterned wafer quality; 3D metrology spanning chip features from nanometer scale transistors to large die interconnects; macro defect inspection of wafers and packages; metal interconnect composition; factory analytics; and lithography for advanced semiconductor packaging.

Our breadth of offerings across the entire semiconductor value chain helps our customers solve their most difficult yield, device performance, quality, and reliability issues. Onto Innovation strives to optimize their customers’ critical path of progress by making them smarter, faster and more efficient.

Headquartered in Wilmington, Massachusetts, Onto Innovation supports customers with a worldwide sales and service organization.

Additional information can be found at www.ontoinnovation.com.

Source: Onto Innovation Inc.

ONTO-I

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