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        <secFileNumber>001-38915</secFileNumber>
        <issuerAddress>
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          <com:street2>Suite 350</com:street2>
          <com:city>San Francisco</com:city>
          <com:stateOrCountry>CA</com:stateOrCountry>
          <com:zipCode>94080</com:zipCode>
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        <issuerContactPhone>6504436209</issuerContactPhone>
        <nameOfPersonForWhoseAccountTheSecuritiesAreToBeSold>Paul Stone</nameOfPersonForWhoseAccountTheSecuritiesAreToBeSold>
        <relationshipsToIssuer>
          <relationshipToIssuer>Officer</relationshipToIssuer>
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        <securitiesClassTitle>Common</securitiesClassTitle>
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          <name>J.P. Morgan Securities LLC</name>
          <address>
            <com:street1>390 Madison Avenue</com:street1>
            <com:street2>6th Floor</com:street2>
            <com:city>New York</com:city>
            <com:stateOrCountry>NY</com:stateOrCountry>
            <com:zipCode>10017</com:zipCode>
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        <aggregateMarketValue>1183500</aggregateMarketValue>
        <noOfUnitsOutstanding>64459472</noOfUnitsOutstanding>
        <approxSaleDate>11/28/2023</approxSaleDate>
        <securitiesExchangeName>Nasdaq</securitiesExchangeName>
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        <securitiesClassTitle>Common</securitiesClassTitle>
        <acquiredDate>11/28/2023</acquiredDate>
        <natureOfAcquisitionTransaction>Stock Option Exercise</natureOfAcquisitionTransaction>
        <nameOfPersonfromWhomAcquired>Issuer</nameOfPersonfromWhomAcquired>
        <isGiftTransaction>N</isGiftTransaction>
        <amountOfSecuritiesAcquired>39450</amountOfSecuritiesAcquired>
        <paymentDate>11/28/2023</paymentDate>
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            <com:city>San Francisco</com:city>
            <com:stateOrCountry>CA</com:stateOrCountry>
            <com:zipCode>94080</com:zipCode>
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        <saleDate>11/27/2023</saleDate>
        <amountOfSecuritiesSold>46654</amountOfSecuritiesSold>
        <grossProceeds>1471933.7</grossProceeds>
      </securitiesSoldInPast3Months>
      <noticeSignature>
        <noticeDate>11/28/2023</noticeDate>
        <signature>/s/ J.P. Morgan Securities LLC as agent and attorney-in-fact for Paul Stone</signature>
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text: 144
  0001777511
  XXXXXXXX
  LIVE
  0001676725
  IDEAYA Biosciences, Inc.
  001-38915
  7000 Shoreline Court
  Suite 350
  San Francisco
  CA
  94080
  6504436209
  Paul Stone
  Officer
  Common
  J.P. Morgan Securities LLC
  390 Madison Avenue
  6th Floor
  New York
  NY
  10017
  39450
  1183500
  64459472
  11/28/2023
  Nasdaq
  Common
  11/28/2023
  Stock Option Exercise
  Issuer
  N
  39450
  11/28/2023
  Cash
  N
  Paul Stone
  C/o Issuer
  7000 Shoreline Court, Suite 350
  San Francisco
  CA
  94080
  Common
  11/27/2023
  46654
  1471933.7
  11/28/2023
  /s/ J.P. Morgan Securities LLC as agent and attorney-in-fact for Paul Stone