content: <?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>0001383318</cik>
            <ccc>XXXXXXXX</ccc>
          </filerCredentials>
        </filer>
        <liveTestFlag>LIVE</liveTestFlag>
  
  
  
      </filerInfo>
    </headerData>
    <formData>
      <issuerInfo>
        <issuerCik>0001660280</issuerCik>
        <issuerName>Tenable Holdings, Inc.</issuerName>
        <secFileNumber>001-38600</secFileNumber>
        <issuerAddress>
          <com:street1>6100 MERRIWEATHER DRIVE</com:street1>
          <com:city>COLUMBIA</com:city>
          <com:stateOrCountry>MD</com:stateOrCountry>
          <com:zipCode>21044</com:zipCode>
        </issuerAddress>
        <issuerContactPhone>410-872-0555</issuerContactPhone>
        <nameOfPersonForWhoseAccountTheSecuritiesAreToBeSold>Yoran Amit</nameOfPersonForWhoseAccountTheSecuritiesAreToBeSold>
        <relationshipsToIssuer>
          <relationshipToIssuer>Officer</relationshipToIssuer>
          <relationshipToIssuer>Director</relationshipToIssuer>
        </relationshipsToIssuer>
      </issuerInfo>
      <securitiesInformation>
        <securitiesClassTitle>Common</securitiesClassTitle>
        <brokerOrMarketmakerDetails>
          <name>Fidelity Brokerage Services LLC</name>
          <address>
            <com:street1>900 Salem Street</com:street1>
            <com:city>Smithfield</com:city>
            <com:stateOrCountry>RI</com:stateOrCountry>
            <com:zipCode>02917</com:zipCode>
          </address>
        </brokerOrMarketmakerDetails>
        <noOfUnitsSold>5673</noOfUnitsSold>
        <aggregateMarketValue>227006.79</aggregateMarketValue>
        <noOfUnitsOutstanding>116934931</noOfUnitsOutstanding>
        <approxSaleDate>11/27/2023</approxSaleDate>
        <securitiesExchangeName>NASDAQ</securitiesExchangeName>
      </securitiesInformation>
      <securitiesToBeSold>
        <securitiesClassTitle>Common</securitiesClassTitle>
        <acquiredDate>11/24/2023</acquiredDate>
        <natureOfAcquisitionTransaction>Restricted Stock Vesting</natureOfAcquisitionTransaction>
        <nameOfPersonfromWhomAcquired>Issuer</nameOfPersonfromWhomAcquired>
        <isGiftTransaction>N</isGiftTransaction>
        <amountOfSecuritiesAcquired>5673</amountOfSecuritiesAcquired>
        <paymentDate>11/24/2023</paymentDate>
        <natureOfPayment>Compensation</natureOfPayment>
      </securitiesToBeSold>
      <nothingToReportFlagOnSecuritiesSoldInPast3Months>N</nothingToReportFlagOnSecuritiesSoldInPast3Months>
      <securitiesSoldInPast3Months>
        <sellerDetails>
          <name>Amit Yoran</name>
          <address>
            <com:street1>6100 Merriweather Drive</com:street1>
            <com:city>Columbia</com:city>
            <com:stateOrCountry>MD</com:stateOrCountry>
            <com:zipCode>21044</com:zipCode>
          </address>
        </sellerDetails>
        <securitiesClassTitle>Common</securitiesClassTitle>
        <saleDate>11/20/2023</saleDate>
        <amountOfSecuritiesSold>4803</amountOfSecuritiesSold>
        <grossProceeds>190431.27</grossProceeds>
      </securitiesSoldInPast3Months>
      <securitiesSoldInPast3Months>
        <sellerDetails>
          <name>Amit Yoran</name>
          <address>
            <com:street1>6100 Merriweather Drive</com:street1>
            <com:city>Columbia</com:city>
            <com:stateOrCountry>MD</com:stateOrCountry>
            <com:zipCode>21044</com:zipCode>
          </address>
        </sellerDetails>
        <securitiesClassTitle>Common</securitiesClassTitle>
        <saleDate>11/21/2023</saleDate>
        <amountOfSecuritiesSold>6579</amountOfSecuritiesSold>
        <grossProceeds>259591.55</grossProceeds>
      </securitiesSoldInPast3Months>
      <noticeSignature>
        <noticeDate>11/27/2023</noticeDate>
        <signature>/s/ Gary Redman, as a duly authorized representative of Fidelity Brokerage Services LLC, as attorney-in-fact for Amit Yoran</signature>
      </noticeSignature>
    </formData>
  </edgarSubmission>
metadata_documents: [{"type": "144", "sequence": "1", "filename": "primary_doc.xml", "secsgml_size_bytes": 4059}]
text: 144
  0001383318
  XXXXXXXX
  LIVE
  0001660280
  Tenable Holdings, Inc.
  001-38600
  6100 MERRIWEATHER DRIVE
  COLUMBIA
  MD
  21044
  410-872-0555
  Yoran Amit
  Officer
  Director
  Common
  Fidelity Brokerage Services LLC
  900 Salem Street
  Smithfield
  RI
  02917
  5673
  227006.79
  116934931
  11/27/2023
  NASDAQ
  Common
  11/24/2023
  Restricted Stock Vesting
  Issuer
  N
  5673
  11/24/2023
  Compensation
  N
  Amit Yoran
  6100 Merriweather Drive
  Columbia
  MD
  21044
  Common
  11/20/2023
  4803
  190431.27
  Amit Yoran
  6100 Merriweather Drive
  Columbia
  MD
  21044
  Common
  11/21/2023
  6579
  259591.55
  11/27/2023
  /s/ Gary Redman, as a duly authorized representative of Fidelity Brokerage Services LLC, as attorney-in-fact for Amit Yoran