Sec Form 4 Filing - KOCH ROBERT ALAN @ Onto Innovation Inc. - 2019-10-25

FORM 4 Check this box if no longer subject to Section 16. Form 4 or Form 5 obligations may continue. See Instruction 1(b).

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 STATEMENT OF CHANGES IN BENEFICIAL OWNERSHIP Filed pursuant to Section 16(a) of the Securities Exchange Act of 1934, Section 17(a) of the Public Utility Holding Company Act of 1935 or Section 30(h) of the Investment Company Act of 1940

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1. Name and Address of Reporting Person KOCH ROBERT ALAN 2. Issuer Name and Ticker or Trading Symbol Onto Innovation Inc. [ ONTO] 5. Relationship of Reporting Person(s) to Issuer (Check all applicable) _____ Director _____ 10% Owner X __ Officer (give title below) _____ Other (specify below) VP & General Counsel (Last) (First) (Middle) C/O ONTO INNOVATION INC., 16 JONSPIN ROAD 3. Date of Earliest Transaction (MM/DD/YY) 10/25/2019 (Street) WILMINGTON, MA01887 4. If Amendment, Date Original Filed (MM/DD/YY) 6. Individual or Joint/Group Filing (Check Applicable Line) __ X __ Form filed by One Reporting Person _____ Form filed by More than One Reporting Person (City) (State) (Zip)

Table I - Non-Derivative Securities Acquired, Disposed of, or Beneficially Owned 1.Title of Security (Instr. 3) 2. Transaction Date (MM/DD/YY) 2A. Deemed Execution Date, if any (MM/DD/YY) 3. Transaction Code (Instr. 8) 4. Securities Acquired (A) or Disposed of (D) (Instr. 3, 4 and 5) 5. Amount of Securities Beneficially Owned Following Reported Transaction(s) (Instr. 3 and 4) 6. Ownership Form: Direct (D) or Indirect (I) (Instr. 4) 7. Nature of Indirect Beneficial Ownership (Instr. 4) Code V Amount (A) or (D) Price Common Stock 10/25/2019 A 37,947 ( 1 ) A 37,947 D Common Stock 10/25/2019 A 10,709 ( 2 ) A 48,656 D

Table II - Derivative Securities Acquired, Disposed of, or Beneficially Owned ( e.g. , puts, calls, warrants, options, convertible securities) 1. Title of Derivative Security (Instr. 3) 2. Conversion or Exercise Price of Derivative Security 3. Transaction Date (MM/DD/YY) 3A. Deemed Execution Date, if any (MM/DD/YY) 4. Transaction Code (Instr. 8) 5. Number of Derivative Securities Acquired (A) or Disposed of (D) (Instr. 3, 4, and 5) 6. Date Exercisable and Expiration Date (MM/DD/YY) 7. Title and Amount of Underlying Securities (Instr. 3 and 4) 8. Price of Derivative Security (Instr. 5) 9. Number of Derivative Securities Beneficially Owned Following Reported Transaction(s) (Instr. 4) 10. Ownership Form of Derivative Security: Direct (D) or Indirect (I) (Instr. 4) 11. Nature of Indirect Beneficial Ownership (Instr. 4) Code V (A) (D) Date Exercisable Expiration Date Title Amount or Number of Shares

Reporting Owners Reporting Owner Name / Address Relationships Director 10% Owner Officer Other KOCH ROBERT ALAN C/O ONTO INNOVATION INC. 16 JONSPIN ROAD WILMINGTON, MA01887 VP & General Counsel Signatures /s/ Robert A. Koch 10/29/2019 Signature of Reporting Person Date

Explanation of Responses:

( 1 )On October 25, 2019, pursuant to an Agreement and Plan of Merger (the "Merger Agreement"), Rudolph Technologies, Inc. ("Rudolph") and Nanometrics Incorporated ("Nanometrics") effected an all-stock merger of equals to combine their respective businesses in which a wholly-owned subsidiary of Nanometrics merged with and into Rudolph, with Rudolph surviving as a wholly-owned subsidiary of Nanometrics (the "Merger"). Pursuant to the Merger Agreement, upon completion of the Merger, Nanometrics changed its name to "Onto Innovation Inc." ("Onto Innovation") and each issued and outstanding share of Rudolph common stock was converted into the right to receive 0.8042 shares of Nanometrics common stock (the "Exchange Ratio"), with cash paid in lieu of fractional shares. ( 2 )These restricted stock units ("RSUs") were originally granted under the Rudolph Technologies, Inc. 2018 Stock Plan (the "Plan") and vest periodically so long as the reporting person remains employed by Onto Innovation or one of its affiliates on each applicable vesting date. At the Effective Time, Onto Innovation assumed the Plan and related award agreements and the existing RSUs became restricted stock units of Onto Innovation, subject to the Exchange Ratio.

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