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      <liveTestFlag>LIVE</liveTestFlag>



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      <issuerCik>0001517413</issuerCik>
      <issuerName>Fastly, Inc.</issuerName>
      <secFileNumber>001-38897</secFileNumber>
      <issuerAddress>
        <com:street1>475 Brannan Street</com:street1>
        <com:street2>Suite 300</com:street2>
        <com:city>San Francisco</com:city>
        <com:stateOrCountry>CA</com:stateOrCountry>
        <com:zipCode>94107</com:zipCode>
      </issuerAddress>
      <issuerContactPhone>8444357859</issuerContactPhone>
      <nameOfPersonForWhoseAccountTheSecuritiesAreToBeSold>Artur Bergman</nameOfPersonForWhoseAccountTheSecuritiesAreToBeSold>
      <relationshipsToIssuer>
        <relationshipToIssuer>Director</relationshipToIssuer>
        <relationshipToIssuer>Officer</relationshipToIssuer>
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      <brokerOrMarketmakerDetails>
        <name>E*TRADE SECURITIES LLC.</name>
        <address>
          <com:street1>4005 Windward Plaza Dr.</com:street1>
          <com:city>Alpharetta</com:city>
          <com:stateOrCountry>GA</com:stateOrCountry>
          <com:zipCode>30005</com:zipCode>
        </address>
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      <noOfUnitsSold>24575</noOfUnitsSold>
      <aggregateMarketValue>444316</aggregateMarketValue>
      <noOfUnitsOutstanding>153067266</noOfUnitsOutstanding>
      <approxSaleDate>03/04/2026</approxSaleDate>
      <securitiesExchangeName>Nasdaq</securitiesExchangeName>
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      <acquiredDate>02/26/2026</acquiredDate>
      <natureOfAcquisitionTransaction>RESTRICTED</natureOfAcquisitionTransaction>
      <nameOfPersonfromWhomAcquired>FASTLY, INC.</nameOfPersonfromWhomAcquired>
      <isGiftTransaction>N</isGiftTransaction>
      <amountOfSecuritiesAcquired>24575</amountOfSecuritiesAcquired>
      <paymentDate>02/28/2026</paymentDate>
      <natureOfPayment>N/A</natureOfPayment>
    </securitiesToBeSold>
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      <sellerDetails>
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          <com:street1>475 Brannan Street, Suite 300</com:street1>
          <com:city>San Francisco</com:city>
          <com:stateOrCountry>CA</com:stateOrCountry>
          <com:zipCode>94107</com:zipCode>
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      <securitiesClassTitle>Class A Common Stock</securitiesClassTitle>
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          <com:stateOrCountry>CA</com:stateOrCountry>
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      <sellerDetails>
        <name>Artur Bergman</name>
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      <securitiesClassTitle>Class A Common Stock</securitiesClassTitle>
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      <sellerDetails>
        <name>Artur Bergman</name>
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          <com:stateOrCountry>CA</com:stateOrCountry>
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      <sellerDetails>
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      <sellerDetails>
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    <noticeSignature>
      <noticeDate>03/03/2026</noticeDate>
      <signature>/s/ Tara Seracka, Attorney-in-fact for Artur Bergman</signature>
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