<SEC-DOCUMENT>0001959173-23-003423.txt : 20230821
<SEC-HEADER>0001959173-23-003423.hdr.sgml : 20230821
<ACCEPTANCE-DATETIME>20230821163202
ACCESSION NUMBER:		0001959173-23-003423
CONFORMED SUBMISSION TYPE:	144
PUBLIC DOCUMENT COUNT:		1
FILED AS OF DATE:		20230821
DATE AS OF CHANGE:		20230821

SUBJECT COMPANY:	

	COMPANY DATA:	
		COMPANY CONFORMED NAME:			ONTO INNOVATION INC.
		CENTRAL INDEX KEY:			0000704532
		STANDARD INDUSTRIAL CLASSIFICATION:	MEASURING & CONTROLLING DEVICES, NEC [3829]
		IRS NUMBER:				942276314
		STATE OF INCORPORATION:			DE
		FISCAL YEAR END:			1226

	FILING VALUES:
		FORM TYPE:		144
		SEC ACT:		1933 Act
		SEC FILE NUMBER:	001-39110
		FILM NUMBER:		231189585

	BUSINESS ADDRESS:	
		STREET 1:		16 JONSPIN ROAD
		CITY:			WILMINGTON
		STATE:			MA
		ZIP:			01887
		BUSINESS PHONE:		9782536200

	MAIL ADDRESS:	
		STREET 1:		16 JONSPIN ROAD
		CITY:			WILMINGTON
		STATE:			MA
		ZIP:			01887

	FORMER COMPANY:	
		FORMER CONFORMED NAME:	Onto Innovation Inc.
		DATE OF NAME CHANGE:	20191025

	FORMER COMPANY:	
		FORMER CONFORMED NAME:	NANOMETRICS INC
		DATE OF NAME CHANGE:	19920703

REPORTING-OWNER:	

	COMPANY DATA:	
		COMPANY CONFORMED NAME:			Plisinski Michael P
		CENTRAL INDEX KEY:			0001325550

	FILING VALUES:
		FORM TYPE:		144

	MAIL ADDRESS:	
		STREET 1:		C/O ONTO INNOVATION, INC.
		STREET 2:		16 JONSPIN ROAD
		CITY:			WILMINGTON
		STATE:			MA
		ZIP:			01887
</SEC-HEADER>
<DOCUMENT>
<TYPE>144
<SEQUENCE>1
<FILENAME>primary_doc.xml
<TEXT>
<XML>
<?xml version="1.0" encoding="UTF-8"?><edgarSubmission xmlns="http://www.sec.gov/edgar/ownership" xmlns:com="http://www.sec.gov/edgar/common">
  <headerData>
    <submissionType>144</submissionType>
    <filerInfo>
      <filer>
        <filerCredentials>
          <cik>0001325550</cik>
          <ccc>XXXXXXXX</ccc>
        </filerCredentials>
      </filer>
      <liveTestFlag>LIVE</liveTestFlag>


    </filerInfo>
  </headerData>
  <formData>
    <issuerInfo>
      <issuerCik>0000704532</issuerCik>
      <issuerName>ONTO INNOVATION INC.</issuerName>
      <secFileNumber>001-39110</secFileNumber>
      <issuerAddress>
        <com:street1>16 JONSPIN ROAD</com:street1>
        <com:city>WILMINGTON</com:city>
        <com:stateOrCountry>MA</com:stateOrCountry>
        <com:zipCode>01887</com:zipCode>
      </issuerAddress>
      <issuerContactPhone>9782536200</issuerContactPhone>
      <nameOfPersonForWhoseAccountTheSecuritiesAreToBeSold>Plisinski Michael P</nameOfPersonForWhoseAccountTheSecuritiesAreToBeSold>
      <relationshipsToIssuer>
        <relationshipToIssuer>Officer</relationshipToIssuer>
      </relationshipsToIssuer>
    </issuerInfo>
    <securitiesInformation>
      <securitiesClassTitle>Common Stock</securitiesClassTitle>
      <brokerOrMarketmakerDetails>
        <name>Fidelity Brokerage Services LLC</name>
        <address>
          <com:street1>245 Summer Street</com:street1>
          <com:city>Boston</com:city>
          <com:stateOrCountry>MA</com:stateOrCountry>
          <com:zipCode>02110</com:zipCode>
        </address>
      </brokerOrMarketmakerDetails>
      <noOfUnitsSold>31000</noOfUnitsSold>
      <aggregateMarketValue>3498413.90</aggregateMarketValue>
      <noOfUnitsOutstanding>49065801</noOfUnitsOutstanding>
      <approxSaleDate>08/21/2023</approxSaleDate>
      <securitiesExchangeName>NYSE</securitiesExchangeName>
    </securitiesInformation>
    <securitiesToBeSold>
      <securitiesClassTitle>Common Stock</securitiesClassTitle>
      <acquiredDate>02/06/2022</acquiredDate>
      <natureOfAcquisitionTransaction>RSU</natureOfAcquisitionTransaction>
      <nameOfPersonfromWhomAcquired>Onto Innovation Inc.</nameOfPersonfromWhomAcquired>
      <isGiftTransaction>N</isGiftTransaction>
      <amountOfSecuritiesAcquired>3589</amountOfSecuritiesAcquired>
      <paymentDate>02/06/2022</paymentDate>
      <natureOfPayment>N/A</natureOfPayment>
    </securitiesToBeSold>
    <securitiesToBeSold>
      <securitiesClassTitle>Common Stock</securitiesClassTitle>
      <acquiredDate>02/07/2022</acquiredDate>
      <natureOfAcquisitionTransaction>RSU</natureOfAcquisitionTransaction>
      <nameOfPersonfromWhomAcquired>Onto Innovation Inc.</nameOfPersonfromWhomAcquired>
      <isGiftTransaction>N</isGiftTransaction>
      <amountOfSecuritiesAcquired>5749</amountOfSecuritiesAcquired>
      <paymentDate>02/07/2022</paymentDate>
      <natureOfPayment>N/A</natureOfPayment>
    </securitiesToBeSold>
    <securitiesToBeSold>
      <securitiesClassTitle>Common Stock</securitiesClassTitle>
      <acquiredDate>02/08/2022</acquiredDate>
      <natureOfAcquisitionTransaction>RSU</natureOfAcquisitionTransaction>
      <nameOfPersonfromWhomAcquired>Onto Innovation Inc.</nameOfPersonfromWhomAcquired>
      <isGiftTransaction>N</isGiftTransaction>
      <amountOfSecuritiesAcquired>4575</amountOfSecuritiesAcquired>
      <paymentDate>02/08/2022</paymentDate>
      <natureOfPayment>N/A</natureOfPayment>
    </securitiesToBeSold>
    <securitiesToBeSold>
      <securitiesClassTitle>Common Stock</securitiesClassTitle>
      <acquiredDate>02/02/2022</acquiredDate>
      <natureOfAcquisitionTransaction>PSU</natureOfAcquisitionTransaction>
      <nameOfPersonfromWhomAcquired>Onto Innovation Inc.</nameOfPersonfromWhomAcquired>
      <isGiftTransaction>N</isGiftTransaction>
      <amountOfSecuritiesAcquired>17087</amountOfSecuritiesAcquired>
      <paymentDate>02/02/2022</paymentDate>
      <natureOfPayment>N/A</natureOfPayment>
    </securitiesToBeSold>
    <nothingToReportFlagOnSecuritiesSoldInPast3Months>Y</nothingToReportFlagOnSecuritiesSoldInPast3Months>
    <noticeSignature>
      <noticeDate>08/21/2023</noticeDate>
      <planAdoptionDates>
        <planAdoptionDate>05/18/2023</planAdoptionDate>
      </planAdoptionDates>
      <signature>/s/ Myra King, as a duly authorized representative of Fidelity Brokerage Services LLC, as attorney-in-fact for Michael P. Plisinski</signature>
    </noticeSignature>
  </formData>
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</TEXT>
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</SEC-DOCUMENT>
