ROBERTS BRIAN K OFFICER DIRECTOR CHANGE FILING

This filing details a transaction by ROBERTS BRIAN K, Chief Financial Officer of ONTO INNOVATION INC. On September 2, 2026, Mr. Roberts disposed of 3,239 shares of Common Stock at a price of $254.55 per share. This disposal was to cover tax withholding obligations related to the vesting of restricted stock units or performance stock units. Following this transaction, Mr. Roberts owns 21,032 shares of Common Stock directly. The filing is made on Form 4, indicating a change in beneficial ownership.