ONTO INNOVATION INC

Rule 10b5-1 Plan Elections

During the fiscal quarter ended September 28, 2024, the following officers, as defined in Rule 16a-1(f) under the Exchange Act, as amended, adopted a “Rule 10b5-1 trading arrangement” as defined in Regulation S-K Item 408, as follows:

On August 16, 2024, Mark R. Slicer, the Company’s Chief Financial Officer, adopted a Rule 10b5-1 trading arrangement providing for the sale from time to time of an aggregate of up to 1,100 shares of our common stock. The trading arrangement is intended to satisfy the affirmative defense in Rule 10b5-1(c). The duration of the trading arrangement is until August 15, 2025, or earlier if all transactions under the trading arrangement are completed.

On August 26, 2024, Michael P. Plisinski, the Company’s Chief Executive Officer, adopted a Rule 10b5-1 trading arrangement providing for the sale from time to time of an aggregate of up to 152,267 shares of our common stock. The trading arrangement is intended to satisfy the affirmative defense in Rule 10b5-1(c). The duration of the trading arrangement is until December 31, 2025, or earlier if all transactions under the trading arrangement are completed.

On September 11, 2024, Srinivas Vedula, the Company’s Senior Vice President of Customer Success, adopted a Rule 10b5-1 trading arrangement providing for the sale from time to time of an aggregate of (i) up to 827 shares of our common stock and (ii) up to 100% of the shares of our common stock issued upon the settlement of 1,847 outstanding RSUs, less the number of shares traded to cover tax withholding obligations in connection with the vesting and settlement of such RSUs. The trading arrangement is intended to satisfy the affirmative defense in Rule 10b5-1(c). The duration of the trading arrangement is until September 11, 2025, or earlier if all transactions under the trading arrangement are completed.