1 unchanged sentence
Rule 10b5-1 Plan Elections
−Removed: During the fiscal quarter ended September 27, 2025 , none of our directors or officers (as defined in Rule 16a-1(f) under the Exchange Act) adopted, modified or terminated a “Rule 10b5-1 trading arrangement” or “non-Rule 10b5-1 trading arrangement” (as those terms are defined in Item 408 of Regulation S-K).
+Added: During the fiscal quarter ended March 31, 2026, the following officers (as defined in Rule 16a-1(f) under the Exchange Act) adopted a “Rule 10b5-1 trading arrangement” or “non-Rule 10b5-1 trading arrangement” (as those terms are defined in Item 408 of Regulation S-K), as follows:
+Added: On February 24, 2026 , Yoon Ah E.
+Added: Oh , the Company’s Senior Vice President, General Counsel and Corporate Secretary , adopted a Rule 10b5-1 trading arrangement providing for the sale from time to time of an aggregate of up to 10,278 shares of our common stock.
+Added: The trading arrangement is intended to satisfy the affirmative defense in Rule 10b5-1(c).
+Added: The duration of the trading arrangement is until February 24, 2027 , or earlier if all transactions under the trading arrangement are completed.
+Added: On February 25, 2026 , Ido Dolev , the Company’s Executive Vice President, Product Solutions Group , adopted a Rule 10b5-1 trading arrangement providing for the sale from time to time of an aggregate of up to 100.0% of the shares of our common stock issued upon the settlement of 7,187 outstanding RSUs, less the number of shares traded to cover tax withholding obligations in connection with the vesting and settlement of such RSUs.
+Added: The trading arrangement is intended to satisfy the affirmative defense in Rule 10b5-1(c).
+Added: The duration of the trading arrangement is until February 24, 2027 , or earlier if all transactions under the trading arrangement are completed.
+Added: On March 9, 2026 , Michael P.
+Added: 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 65,937 shares of our common stock.
+Added: The trading arrangement is intended to satisfy the affirmative defense in Rule 10b5-1(c).
+Added: The duration of the trading arrangement is until January 31, 2027 , or earlier if all transactions under the trading arrangement are completed.
+Added: Share Purchase Agreement, dated as of April 21, 2026 (Tokyo time), by and between Onto Innovation Inc.
+Added: and Atom Investments, L.P, incorporated by reference to Exhibit 2.1 to the Company’s Form 8-K filed with the SEC on April 21, 2026 (File No.
Amended and Restated Certificate of Incorporation of Onto Innovation Inc., dated October 25, 2019, incorporated by reference to Exhibit 3.2 to the Company’s Form 8-K filed with the SEC on October 28, 2019 (File No.
Amended and Restated Bylaws of Onto Innovation Inc., dated January 22, 2020, incorporated by reference to Exhibit 3.1 to the Company’s Form 8-K filed with the SEC on January 27, 2020 (File No.
−Removed: Separation Agreement between Onto Innovation Inc.
−Removed: and Mark Slicer, dated July 9, 2025, incorporated by reference to Exhibit 10.1 to the Company’s Form 8-K/A filed with the SEC on July 11, 2025 (File No.
−Removed: 10.2^^
−Removed: Amendment to Equity Purchase Agreement, dated as of October 9, 2025, by and among Onto Innovation Inc., Semilab USA LLC, Semilab International Zrt.
−Removed: and Semilab Zrt., incorporated by reference to Exhibit 2.1 to the Company’s Form 8-K filed with the SEC on October 10, 2025 (File No.
+Added: Offer Letter to Ido Dolev, dated October 30, 2024, by and between Ido Dolev and Onto Innovation Inc.
+Added: Offer Letter to Shirley Chen, dated May 16, 2025, by and between Shirley Chen and Onto Innovation Inc.
Rule 13a-14(a) Certification of Chief Executive Officer of the Registrant pursuant to Section 302 of the Sarbanes-Oxley Act of 2002.
8 unchanged sentences
+ Management contract, compensatory plan or arrangement.
−Removed: Certain identified information has been excluded from this exhibit in accordance with Item 601(b)(10)(iv) of Regulation S-K because it is both not material and is the type that the registrant treats as private or confidential.
Schedules omitted pursuant to Item 601(b)(2) of Regulation S-K.
2 unchanged sentences
Onto Innovation Inc.
−Removed: November 6, 2025
/s/ Michael P.
Chief Executive Officer
−Removed: November 6, 2025
Chief Financial Officer and Principal Accounting Officer
Compared sentence by sentence after normalising whitespace, quotation marks, case and digits, so re-formatting and restated figures do not read as changed language. Wording changes appear as one removal and one addition. The current filing and the prior one are authoritative.