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        <liveTestFlag>LIVE</liveTestFlag>
  
  
  
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        <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>Anschutz Barron</nameOfPersonForWhoseAccountTheSecuritiesAreToBeSold>
        <relationshipsToIssuer>
          <relationshipToIssuer>Officer</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>1245</noOfUnitsSold>
        <aggregateMarketValue>39814.60</aggregateMarketValue>
        <noOfUnitsOutstanding>122170671</noOfUnitsOutstanding>
        <approxSaleDate>05/23/2025</approxSaleDate>
        <securitiesExchangeName>NASDAQ</securitiesExchangeName>
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        <securitiesClassTitle>Common</securitiesClassTitle>
        <acquiredDate>05/22/2025</acquiredDate>
        <natureOfAcquisitionTransaction>Restricted Stock Vesting</natureOfAcquisitionTransaction>
        <nameOfPersonfromWhomAcquired>Issuer</nameOfPersonfromWhomAcquired>
        <isGiftTransaction>N</isGiftTransaction>
        <amountOfSecuritiesAcquired>1245</amountOfSecuritiesAcquired>
        <paymentDate>05/22/2025</paymentDate>
        <natureOfPayment>Compensation</natureOfPayment>
      </securitiesToBeSold>
      <nothingToReportFlagOnSecuritiesSoldInPast3Months>N</nothingToReportFlagOnSecuritiesSoldInPast3Months>
      <securitiesSoldInPast3Months>
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          <name>Stephen Vintz</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>02/25/2025</saleDate>
        <amountOfSecuritiesSold>4551</amountOfSecuritiesSold>
        <grossProceeds>175120.21</grossProceeds>
      </securitiesSoldInPast3Months>
      <securitiesSoldInPast3Months>
        <sellerDetails>
          <name>Bridgett Paradise</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>02/25/2025</saleDate>
        <amountOfSecuritiesSold>3021</amountOfSecuritiesSold>
        <grossProceeds>116246.57</grossProceeds>
      </securitiesSoldInPast3Months>
      <securitiesSoldInPast3Months>
        <sellerDetails>
          <name>Stephen Vintz</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>02/26/2025</saleDate>
        <amountOfSecuritiesSold>6284</amountOfSecuritiesSold>
        <grossProceeds>239981.57</grossProceeds>
      </securitiesSoldInPast3Months>
      <securitiesSoldInPast3Months>
        <sellerDetails>
          <name>Bridgett Paradise</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>02/26/2025</saleDate>
        <amountOfSecuritiesSold>3045</amountOfSecuritiesSold>
        <grossProceeds>116286.42</grossProceeds>
      </securitiesSoldInPast3Months>
      <securitiesSoldInPast3Months>
        <sellerDetails>
          <name>Stephen Vintz</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>02/27/2025</saleDate>
        <amountOfSecuritiesSold>6681</amountOfSecuritiesSold>
        <grossProceeds>254958.32</grossProceeds>
      </securitiesSoldInPast3Months>
      <securitiesSoldInPast3Months>
        <sellerDetails>
          <name>Bridgett Paradise</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>02/27/2025</saleDate>
        <amountOfSecuritiesSold>3046</amountOfSecuritiesSold>
        <grossProceeds>116240.54</grossProceeds>
      </securitiesSoldInPast3Months>
      <securitiesSoldInPast3Months>
        <sellerDetails>
          <name>James B. Anschutz</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>02/28/2025</saleDate>
        <amountOfSecuritiesSold>4405</amountOfSecuritiesSold>
        <grossProceeds>165565.44</grossProceeds>
      </securitiesSoldInPast3Months>
      <remarks>Sale includes an amount necessary to cover a tax obligation resulting from the settlement of a vested equity award distribution. James Barron Anschutz is an authorized trader for the accounts of Stephen Vintz and Bridgett Paradise.</remarks>
      <noticeSignature>
        <noticeDate>05/23/2025</noticeDate>
        <signature>/s/ Andrew Glade, as a duly authorized representative of Fidelity Brokerage Services LLC, as attorney-in-fact for James B. Anschutz</signature>
      </noticeSignature>
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text: 144
  0001309403
  XXXXXXXX
  LIVE
  0001660280
  Tenable Holdings, Inc.
  001-38600
  6100 MERRIWEATHER DRIVE
  COLUMBIA
  MD
  21044
  410-872-0555
  Anschutz Barron
  Officer
  Common
  Fidelity Brokerage Services LLC
  900 Salem Street
  Smithfield
  RI
  02917
  1245
  39814.60
  122170671
  05/23/2025
  NASDAQ
  Common
  05/22/2025
  Restricted Stock Vesting
  Issuer
  N
  1245
  05/22/2025
  Compensation
  N
  Stephen Vintz
  6100 Merriweather Drive
  Columbia
  MD
  21044
  Common
  02/25/2025
  4551
  175120.21
  Bridgett Paradise
  6100 Merriweather Drive
  Columbia
  MD
  21044
  Common
  02/25/2025
  3021
  116246.57
  Stephen Vintz
  6100 Merriweather Drive
  Columbia
  MD
  21044
  Common
  02/26/2025
  6284
  239981.57
  Bridgett Paradise
  6100 Merriweather Drive
  Columbia
  MD
  21044
  Common
  02/26/2025
  3045
  116286.42
  Stephen Vintz
  6100 Merriweather Drive
  Columbia
  MD
  21044
  Common
  02/27/2025
  6681
  254958.32
  Bridgett Paradise
  6100 Merriweather Drive
  Columbia
  MD
  21044
  Common
  02/27/2025
  3046
  116240.54
  James B. Anschutz
  6100 Merriweather Drive
  Columbia
  MD
  21044
  Common
  02/28/2025
  4405
  165565.44
  Sale includes an amount necessary to cover a tax obligation resulting from the settlement of a vested equity award distribution. James Barron Anschutz is an authorized trader for the accounts of Stephen Vintz and Bridgett Paradise.
  05/23/2025
  /s/ Andrew Glade, as a duly authorized representative of Fidelity Brokerage Services LLC, as attorney-in-fact for James B. Anschutz