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The price reported in Column 4 above reflects the weighted average sale price. 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The price reported in Column 4 above reflects the weighted average sale price. The Reporting Person hereby undertakes to provide to the Securities and Exchange Commission staff, the Issuer, or a security holder of the Issuer, upon request, full information regarding the number of shares sold at each respective price within the range set forth in this footnote."}],"balance_after":691495,"source":{"system":"sec-edgar","filing":"0001610717-26-000434","document":"form4.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":2,"url":"https://www.sec.gov/Archives/edgar/data/1676725/000161071726000434/form4.xml","form_type":"4"}},{"id":4638235,"issuer":{"id":4069,"kind":"organization","name":"IDEAYA Biosciences, Inc.","symbol":"IDYA"},"owners":[{"id":61040,"kind":"person","name":"Hata Yujiro S","position":1,"cik":"0001649119","reported_name":"Hata Yujiro S","relationship":{"director":true,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"President and CEO"}}],"security":"Common 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The price reported in Column 4 above reflects the weighted average sale price. The Reporting Person hereby undertakes to provide to the Securities and Exchange Commission staff, the Issuer, or a security holder of the Issuer, upon request, full information regarding the number of shares sold at each respective price within the range set forth in this footnote."}],"balance_after":677887,"source":{"system":"sec-edgar","filing":"0001610717-24-000239","document":"form4.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":10,"url":"https://www.sec.gov/Archives/edgar/data/1649119/000161071724000239/form4.xml","form_type":"4"}},{"id":1514249,"issuer":{"id":4069,"kind":"organization","name":"IDEAYA Biosciences, Inc.","symbol":"IDYA"},"owners":[{"id":61040,"kind":"person","name":"Hata Yujiro S","position":1,"cik":"0001649119","reported_name":"Hata Yujiro S","relationship":{"director":true,"officer":true,"officer_title":"President and CEO"}}],"security":"Common Stock","published_at":"2024-05-16T17:51:24.000Z","date":"2024-05-16","kind":"sale","planned":true,"acquired":false,"shares":30084,"price":41.7333,"value":1255504.5972,"ownership":{"direct":true},"footnotes":[{"field":"kind","element":"transactionCoding","label":"F1","text":"The transactions reported herein were effected pursuant to the Reporting Person's Rule 10b5-1 trading plan, adopted on December 22, 2023."},{"field":"price","element":"transactionPricePerShare","label":"F7","text":"This transaction was executed in multiple trades in prices ranging from $41.2651 to $42.25, inclusive. The price reported in Column 4 above reflects the weighted average sale price. The Reporting Person hereby undertakes to provide to the Securities and Exchange Commission staff, the Issuer, or a security holder of the Issuer, upon request, full information regarding the number of shares sold at each respective price within the range set forth in this footnote."}],"balance_after":682236,"source":{"system":"sec-edgar","filing":"0001610717-24-000239","document":"form4.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":9,"url":"https://www.sec.gov/Archives/edgar/data/1649119/000161071724000239/form4.xml","form_type":"4"}},{"id":1514248,"issuer":{"id":4069,"kind":"organization","name":"IDEAYA Biosciences, Inc.","symbol":"IDYA"},"owners":[{"id":61040,"kind":"person","name":"Hata Yujiro S","position":1,"cik":"0001649119","reported_name":"Hata Yujiro S","relationship":{"director":true,"officer":true,"officer_title":"President and CEO"}}],"security":"Common Stock","published_at":"2024-05-16T17:51:24.000Z","date":"2024-05-16","kind":"exercise","planned":true,"acquired":true,"shares":34433,"price":4.31,"value":148406.23,"ownership":{"direct":true},"balance_after":712320,"source":{"system":"sec-edgar","filing":"0001610717-24-000239","document":"form4.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":8,"url":"https://www.sec.gov/Archives/edgar/data/1649119/000161071724000239/form4.xml","form_type":"4"}},{"id":1514247,"issuer":{"id":4069,"kind":"organization","name":"IDEAYA Biosciences, Inc.","symbol":"IDYA"},"owners":[{"id":61040,"kind":"person","name":"Hata Yujiro S","position":1,"cik":"0001649119","reported_name":"Hata Yujiro S","relationship":{"director":true,"officer":true,"officer_title":"President and CEO"}}],"security":"Common Stock","published_at":"2024-05-16T17:51:24.000Z","date":"2024-05-15","kind":"sale","planned":true,"acquired":false,"shares":503,"price":44.1179,"value":22191.3037,"ownership":{"direct":true},"footnotes":[{"field":"kind","element":"transactionCoding","label":"F1","text":"The transactions reported herein were effected pursuant to the Reporting Person's Rule 10b5-1 trading plan, adopted on December 22, 2023."},{"field":"price","element":"transactionPricePerShare","label":"F6","text":"This transaction was executed in multiple trades in prices ranging from $44.10 to $44.14, inclusive. The price reported in Column 4 above reflects the weighted average sale price. The Reporting Person hereby undertakes to provide to the Securities and Exchange Commission staff, the Issuer, or a security holder of the Issuer, upon request, full information regarding the number of shares sold at each respective price within the range set forth in this footnote."}],"balance_after":677887,"source":{"system":"sec-edgar","filing":"0001610717-24-000239","document":"form4.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":7,"url":"https://www.sec.gov/Archives/edgar/data/1649119/000161071724000239/form4.xml","form_type":"4"}},{"id":1514246,"issuer":{"id":4069,"kind":"organization","name":"IDEAYA Biosciences, Inc.","symbol":"IDYA"},"owners":[{"id":61040,"kind":"person","name":"Hata Yujiro S","position":1,"cik":"0001649119","reported_name":"Hata Yujiro S","relationship":{"director":true,"officer":true,"officer_title":"President and CEO"}}],"security":"Common Stock","published_at":"2024-05-16T17:51:24.000Z","date":"2024-05-15","kind":"sale","planned":true,"acquired":false,"shares":29761,"price":43.4775,"value":1293933.8775,"ownership":{"direct":true},"footnotes":[{"field":"kind","element":"transactionCoding","label":"F1","text":"The transactions reported herein were effected pursuant to the Reporting Person's Rule 10b5-1 trading plan, adopted on December 22, 2023."},{"field":"price","element":"transactionPricePerShare","label":"F5","text":"This transaction was executed in multiple trades in prices ranging from $43.09 to $43.99, inclusive. The price reported in Column 4 above reflects the weighted average sale price. The Reporting Person hereby undertakes to provide to the Securities and Exchange Commission staff, the Issuer, or a security holder of the Issuer, upon request, full information regarding the number of shares sold at each respective price within the range set forth in this footnote."}],"balance_after":678390,"source":{"system":"sec-edgar","filing":"0001610717-24-000239","document":"form4.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":6,"url":"https://www.sec.gov/Archives/edgar/data/1649119/000161071724000239/form4.xml","form_type":"4"}},{"id":1514245,"issuer":{"id":4069,"kind":"organization","name":"IDEAYA Biosciences, Inc.","symbol":"IDYA"},"owners":[{"id":61040,"kind":"person","name":"Hata Yujiro S","position":1,"cik":"0001649119","reported_name":"Hata Yujiro S","relationship":{"director":true,"officer":true,"officer_title":"President and CEO"}}],"security":"Common Stock","published_at":"2024-05-16T17:51:24.000Z","date":"2024-05-15","kind":"sale","planned":true,"acquired":false,"shares":53592,"price":42.5741,"value":2281631.1672,"ownership":{"direct":true},"footnotes":[{"field":"kind","element":"transactionCoding","label":"F1","text":"The transactions reported herein were effected pursuant to the Reporting Person's Rule 10b5-1 trading plan, adopted on December 22, 2023."},{"field":"price","element":"transactionPricePerShare","label":"F4","text":"This transaction was executed in multiple trades in prices ranging from $42.08 to $43.07, inclusive. The price reported in Column 4 above reflects the weighted average sale price. 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