<?xml version="1.0" encoding="UTF-8"?><own:edgarSubmission xmlns:com="http://www.sec.gov/edgar/common" xmlns:own="http://www.sec.gov/edgar/ownership">
  <!-- Generated by Workiva -->
  <own:headerData>
    <own:submissionType>144</own:submissionType>
    <own:filerInfo>
      <own:filer>
        <own:filerCredentials>
          <own:cik>0001998053</own:cik>
          <own:ccc>XXXXXXXX</own:ccc>
        </own:filerCredentials>
      </own:filer>
      <own:liveTestFlag>LIVE</own:liveTestFlag>



    </own:filerInfo>
  </own:headerData>
  <own:formData>
    <own:issuerInfo>
      <own:issuerCik>0001736297</own:issuerCik>
      <own:issuerName>Astera Labs, Inc.</own:issuerName>
      <own:secFileNumber>001-41979</own:secFileNumber>
      <own:issuerAddress>
        <com:street1>2345 North First Street</com:street1>
        <com:city>San Jose</com:city>
        <com:stateOrCountry>CA</com:stateOrCountry>
        <com:zipCode>95131</com:zipCode>
      </own:issuerAddress>
      <own:issuerContactPhone>408-766-3806</own:issuerContactPhone>
      <own:nameOfPersonForWhoseAccountTheSecuritiesAreToBeSold>Jitendra Mohan</own:nameOfPersonForWhoseAccountTheSecuritiesAreToBeSold>
      <own:relationshipsToIssuer>
        <own:relationshipToIssuer>CEO, Director</own:relationshipToIssuer>
      </own:relationshipsToIssuer>
    </own:issuerInfo>
    <own:securitiesInformation>
      <own:securitiesClassTitle>Common Stock</own:securitiesClassTitle>
      <own:brokerOrMarketmakerDetails>
        <own:name>J.P. Morgan Securities LLC</own:name>
        <own:address>
          <com:street1>270 Park Avenue, 10th Floor</com:street1>
          <com:city>New York</com:city>
          <com:stateOrCountry>NY</com:stateOrCountry>
          <com:zipCode>10017</com:zipCode>
        </own:address>
      </own:brokerOrMarketmakerDetails>
      <own:noOfUnitsSold>412500</own:noOfUnitsSold>
      <own:aggregateMarketValue>70459125</own:aggregateMarketValue>
      <own:noOfUnitsOutstanding>170214503</own:noOfUnitsOutstanding>
      <own:approxSaleDate>04/17/2026</own:approxSaleDate>
      <own:securitiesExchangeName>NASDAQ</own:securitiesExchangeName>
    </own:securitiesInformation>
    <own:securitiesToBeSold>
      <own:securitiesClassTitle>Common Stock</own:securitiesClassTitle>
      <own:acquiredDate>12/01/2025</own:acquiredDate>
      <own:natureOfAcquisitionTransaction>Transfer</own:natureOfAcquisitionTransaction>
      <own:nameOfPersonfromWhomAcquired>Jitendra Mohan, who acquired from Issuer as RSUs on 11/15/25</own:nameOfPersonfromWhomAcquired>
      <own:isGiftTransaction>N</own:isGiftTransaction>
      <own:amountOfSecuritiesAcquired>71730</own:amountOfSecuritiesAcquired>
      <own:paymentDate>12/01/2025</own:paymentDate>
      <own:natureOfPayment>N/A</own:natureOfPayment>
    </own:securitiesToBeSold>
    <own:securitiesToBeSold>
      <own:securitiesClassTitle>Common Stock</own:securitiesClassTitle>
      <own:acquiredDate>11/21/2017</own:acquiredDate>
      <own:natureOfAcquisitionTransaction>Transfer</own:natureOfAcquisitionTransaction>
      <own:nameOfPersonfromWhomAcquired>Jitendra Mohan, who acquired from Issuer as Founder Shares on 11/21/17</own:nameOfPersonfromWhomAcquired>
      <own:isGiftTransaction>N</own:isGiftTransaction>
      <own:amountOfSecuritiesAcquired>340770</own:amountOfSecuritiesAcquired>
      <own:paymentDate>11/21/2017</own:paymentDate>
      <own:natureOfPayment>N/A</own:natureOfPayment>
    </own:securitiesToBeSold>
    <own:nothingToReportFlagOnSecuritiesSoldInPast3Months>N</own:nothingToReportFlagOnSecuritiesSoldInPast3Months>
    <own:securitiesSoldInPast3Months>
      <own:sellerDetails>
        <own:name>Jitendra Mohan</own:name>
        <own:address>
          <com:street1>C/o Astera Labs, Inc.</com:street1>
          <com:street2>2345 North First Street</com:street2>
          <com:city>San Jose</com:city>
          <com:stateOrCountry>CA</com:stateOrCountry>
          <com:zipCode>95131</com:zipCode>
        </own:address>
      </own:sellerDetails>
      <own:securitiesClassTitle>Common Stock</own:securitiesClassTitle>
      <own:saleDate>02/17/2026</own:saleDate>
      <own:amountOfSecuritiesSold>94971</own:amountOfSecuritiesSold>
      <own:grossProceeds>11758145.75</own:grossProceeds>
    </own:securitiesSoldInPast3Months>
    <own:securitiesSoldInPast3Months>
      <own:sellerDetails>
        <own:name>Mohan &amp; Samant 2022 Living Trust</own:name>
        <own:address>
          <com:street1>C/o Astera Labs, Inc.</com:street1>
          <com:street2>2345 North First Street</com:street2>
          <com:city>San Jose</com:city>
          <com:stateOrCountry>CA</com:stateOrCountry>
          <com:zipCode>95131</com:zipCode>
        </own:address>
      </own:sellerDetails>
      <own:securitiesClassTitle>Common Stock</own:securitiesClassTitle>
      <own:saleDate>03/17/2026</own:saleDate>
      <own:amountOfSecuritiesSold>157500</own:amountOfSecuritiesSold>
      <own:grossProceeds>20723774</own:grossProceeds>
    </own:securitiesSoldInPast3Months>
    <own:securitiesSoldInPast3Months>
      <own:sellerDetails>
        <own:name>Mohan &amp; Samant 2022 Living Trust</own:name>
        <own:address>
          <com:street1>C/o Astera Labs, Inc.</com:street1>
          <com:street2>2345 North First Street</com:street2>
          <com:city>San Jose</com:city>
          <com:stateOrCountry>CA</com:stateOrCountry>
          <com:zipCode>95131</com:zipCode>
        </own:address>
      </own:sellerDetails>
      <own:securitiesClassTitle>Common Stock</own:securitiesClassTitle>
      <own:saleDate>04/10/2026</own:saleDate>
      <own:amountOfSecuritiesSold>123750</own:amountOfSecuritiesSold>
      <own:grossProceeds>18522450</own:grossProceeds>
    </own:securitiesSoldInPast3Months>
    <own:securitiesSoldInPast3Months>
      <own:sellerDetails>
        <own:name>Mohan &amp; Samant 2022 Living Trust</own:name>
        <own:address>
          <com:street1>C/o Astera Labs, Inc.</com:street1>
          <com:street2>2345 North First Street</com:street2>
          <com:city>San Jose</com:city>
          <com:stateOrCountry>CA</com:stateOrCountry>
          <com:zipCode>95131</com:zipCode>
        </own:address>
      </own:sellerDetails>
      <own:securitiesClassTitle>Common Stock</own:securitiesClassTitle>
      <own:saleDate>04/15/2026</own:saleDate>
      <own:amountOfSecuritiesSold>2967</own:amountOfSecuritiesSold>
      <own:grossProceeds>518036</own:grossProceeds>
    </own:securitiesSoldInPast3Months>
    <own:remarks>The shares filed today will be sold by the Mohan &amp; Samant 2022 Living Trust, Jitendra Mohan as Trustee. The shares will be sold today or within three months from the date of this filing.</own:remarks>
    <own:noticeSignature>
      <own:noticeDate>04/17/2026</own:noticeDate>
      <own:planAdoptionDates>
        <own:planAdoptionDate>12/01/2025</own:planAdoptionDate>
      </own:planAdoptionDates>
      <own:signature>/s/ J.P. Morgan Securities LLC as agent and attorney-in-fact for Jitendra Mohan</own:signature>
    </own:noticeSignature>
  </own:formData>
</own:edgarSubmission>
