<?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/A</own:submissionType>
    <own:previousAccessionNumber>0001628280-26-025291</own:previousAccessionNumber>
    <own:filerInfo>
      <own:filer>
        <own:filerCredentials>
          <own:cik>0001973524</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>0001761918</own:issuerCik>
      <own:issuerName>Erasca Inc</own:issuerName>
      <own:secFileNumber>001-40602</own:secFileNumber>
      <own:issuerAddress>
        <com:street1>3115 MERRYFIELD ROW STE 300</com:street1>
        <com:city>San Diego</com:city>
        <com:stateOrCountry>CA</com:stateOrCountry>
        <com:zipCode>92121</com:zipCode>
      </own:issuerAddress>
      <own:issuerContactPhone>8584656511</own:issuerContactPhone>
      <own:nameOfPersonForWhoseAccountTheSecuritiesAreToBeSold>Erasca Foundation</own:nameOfPersonForWhoseAccountTheSecuritiesAreToBeSold>
      <own:relationshipsToIssuer>
        <own:relationshipToIssuer>Foundation</own:relationshipToIssuer>
      </own:relationshipsToIssuer>
    </own:issuerInfo>
    <own:securitiesInformation>
      <own:securitiesClassTitle>Common</own:securitiesClassTitle>
      <own:brokerOrMarketmakerDetails>
        <own:name>Merrill Lynch</own:name>
        <own:address>
          <com:street1>6002 El Tordo</com:street1>
          <com:street2>PO Box 7297</com:street2>
          <com:city>Rancho Santa Fe</com:city>
          <com:stateOrCountry>CA</com:stateOrCountry>
          <com:zipCode>92067</com:zipCode>
        </own:address>
      </own:brokerOrMarketmakerDetails>
      <own:noOfUnitsSold>8333</own:noOfUnitsSold>
      <own:aggregateMarketValue>150843.19</own:aggregateMarketValue>
      <own:noOfUnitsOutstanding>310799547</own:noOfUnitsOutstanding>
      <own:approxSaleDate>04/15/2026</own:approxSaleDate>
      <own:securitiesExchangeName>NASDAQ</own:securitiesExchangeName>
    </own:securitiesInformation>
    <own:securitiesToBeSold>
      <own:securitiesClassTitle>Common</own:securitiesClassTitle>
      <own:acquiredDate>07/20/2021</own:acquiredDate>
      <own:natureOfAcquisitionTransaction>Donation</own:natureOfAcquisitionTransaction>
      <own:nameOfPersonfromWhomAcquired>Erasca, Inc.</own:nameOfPersonfromWhomAcquired>
      <own:isGiftTransaction>N</own:isGiftTransaction>
      <own:amountOfSecuritiesAcquired>10193557</own:amountOfSecuritiesAcquired>
      <own:paymentDate>07/20/2021</own:paymentDate>
      <own:natureOfPayment>Donation</own:natureOfPayment>
    </own:securitiesToBeSold>
    <own:nothingToReportFlagOnSecuritiesSoldInPast3Months>N</own:nothingToReportFlagOnSecuritiesSoldInPast3Months>
    <own:securitiesSoldInPast3Months>
      <own:sellerDetails>
        <own:name>Erasca Foundation</own:name>
        <own:address>
          <com:street1>3115 MERRYFIELD ROW</com:street1>
          <com:street2>STE 300</com:street2>
          <com:city>San Diego</com:city>
          <com:stateOrCountry>CA</com:stateOrCountry>
          <com:zipCode>92121</com:zipCode>
        </own:address>
      </own:sellerDetails>
      <own:securitiesClassTitle>Common</own:securitiesClassTitle>
      <own:saleDate>03/16/2026</own:saleDate>
      <own:amountOfSecuritiesSold>8333</own:amountOfSecuritiesSold>
      <own:grossProceeds>116855.46</own:grossProceeds>
    </own:securitiesSoldInPast3Months>
    <own:securitiesSoldInPast3Months>
      <own:sellerDetails>
        <own:name>Erasca Foundation</own:name>
        <own:address>
          <com:street1>3115 MERRYFIELD ROW</com:street1>
          <com:street2>STE 300</com:street2>
          <com:city>San Diego</com:city>
          <com:stateOrCountry>CA</com:stateOrCountry>
          <com:zipCode>92121</com:zipCode>
        </own:address>
      </own:sellerDetails>
      <own:securitiesClassTitle>Common</own:securitiesClassTitle>
      <own:saleDate>02/17/2026</own:saleDate>
      <own:amountOfSecuritiesSold>8333</own:amountOfSecuritiesSold>
      <own:grossProceeds>99245.03</own:grossProceeds>
    </own:securitiesSoldInPast3Months>
    <own:securitiesSoldInPast3Months>
      <own:sellerDetails>
        <own:name>Erasca Foundation</own:name>
        <own:address>
          <com:street1>3115 MERRYFIELD ROW</com:street1>
          <com:street2>STE 300</com:street2>
          <com:city>San Diego</com:city>
          <com:stateOrCountry>CA</com:stateOrCountry>
          <com:zipCode>92121</com:zipCode>
        </own:address>
      </own:sellerDetails>
      <own:securitiesClassTitle>Common</own:securitiesClassTitle>
      <own:saleDate>01/15/2026</own:saleDate>
      <own:amountOfSecuritiesSold>8333</own:amountOfSecuritiesSold>
      <own:grossProceeds>68573.87</own:grossProceeds>
    </own:securitiesSoldInPast3Months>
    <own:noticeSignature>
      <own:noticeDate>04/15/2026</own:noticeDate>
      <own:planAdoptionDates>
        <own:planAdoptionDate>01/10/2024</own:planAdoptionDate>
      </own:planAdoptionDates>
      <own:signature>David Chacko</own:signature>
    </own:noticeSignature>
  </own:formData>
</own:edgarSubmission>
