<SEC-DOCUMENT>0001610717-23-000225.txt : 20230811
<SEC-HEADER>0001610717-23-000225.hdr.sgml : 20230811
<ACCEPTANCE-DATETIME>20230811192128
ACCESSION NUMBER:		0001610717-23-000225
CONFORMED SUBMISSION TYPE:	4
PUBLIC DOCUMENT COUNT:		1
CONFORMED PERIOD OF REPORT:	20230809
FILED AS OF DATE:		20230811
DATE AS OF CHANGE:		20230811

REPORTING-OWNER:	

	OWNER DATA:	
		COMPANY CONFORMED NAME:			Stone Paul A.
		CENTRAL INDEX KEY:			0001777511

	FILING VALUES:
		FORM TYPE:		4
		SEC ACT:		1934 Act
		SEC FILE NUMBER:	001-38915
		FILM NUMBER:		231165745

	MAIL ADDRESS:	
		STREET 1:		C/O IDEAYA BIOSCIENCES, INC.
		STREET 2:		7000 SHORELINE COURT, SUITE 350
		CITY:			SOUTH SAN FRANCISCO
		STATE:			CA
		ZIP:			94080

ISSUER:		

	COMPANY DATA:	
		COMPANY CONFORMED NAME:			IDEAYA Biosciences, Inc.
		CENTRAL INDEX KEY:			0001676725
		STANDARD INDUSTRIAL CLASSIFICATION:	PHARMACEUTICAL PREPARATIONS [2834]
		IRS NUMBER:				474268251
		STATE OF INCORPORATION:			DE
		FISCAL YEAR END:			1231

	BUSINESS ADDRESS:	
		STREET 1:		7000 SHORELINE COURT, SUITE 350
		CITY:			SOUTH SAN FRANCISCO
		STATE:			CA
		ZIP:			94080
		BUSINESS PHONE:		650-443-6209

	MAIL ADDRESS:	
		STREET 1:		7000 SHORELINE COURT, SUITE 350
		CITY:			SOUTH SAN FRANCISCO
		STATE:			CA
		ZIP:			94080

	FORMER COMPANY:	
		FORMER CONFORMED NAME:	Ideaya Biosciences, Inc.
		DATE OF NAME CHANGE:	20160609
</SEC-HEADER>
<DOCUMENT>
<TYPE>4
<SEQUENCE>1
<FILENAME>form4.xml
<TEXT>
<XML>
<?xml version="1.0"?>
<ownershipDocument>

    <schemaVersion>X0508</schemaVersion>

    <documentType>4</documentType>

    <periodOfReport>2023-08-09</periodOfReport>

    <issuer>
        <issuerCik>0001676725</issuerCik>
        <issuerName>IDEAYA Biosciences, Inc.</issuerName>
        <issuerTradingSymbol>IDYA</issuerTradingSymbol>
    </issuer>

    <reportingOwner>
        <reportingOwnerId>
            <rptOwnerCik>0001777511</rptOwnerCik>
            <rptOwnerName>Stone Paul A.</rptOwnerName>
        </reportingOwnerId>
        <reportingOwnerAddress>
            <rptOwnerStreet1>C/O IDEAYA BIOSCIENCES, INC.</rptOwnerStreet1>
            <rptOwnerStreet2>7000 SHORELINE COURT, SUITE 350</rptOwnerStreet2>
            <rptOwnerCity>SOUTH SAN FRANCISCO</rptOwnerCity>
            <rptOwnerState>CA</rptOwnerState>
            <rptOwnerZipCode>94080</rptOwnerZipCode>
            <rptOwnerStateDescription></rptOwnerStateDescription>
        </reportingOwnerAddress>
        <reportingOwnerRelationship>
            <isOfficer>true</isOfficer>
            <officerTitle>Chief Financial Officer</officerTitle>
        </reportingOwnerRelationship>
    </reportingOwner>

    <aff10b5One>true</aff10b5One>

    <nonDerivativeTable>
        <nonDerivativeTransaction>
            <securityTitle>
                <value>Common Stock</value>
            </securityTitle>
            <transactionDate>
                <value>2023-08-09</value>
            </transactionDate>
            <transactionCoding>
                <transactionFormType>4</transactionFormType>
                <transactionCode>S</transactionCode>
                <equitySwapInvolved>0</equitySwapInvolved>
                <footnoteId id="F1"/>
            </transactionCoding>
            <transactionAmounts>
                <transactionShares>
                    <value>2500</value>
                </transactionShares>
                <transactionPricePerShare>
                    <value>25.0453</value>
                    <footnoteId id="F2"/>
                </transactionPricePerShare>
                <transactionAcquiredDisposedCode>
                    <value>D</value>
                </transactionAcquiredDisposedCode>
            </transactionAmounts>
            <postTransactionAmounts>
                <sharesOwnedFollowingTransaction>
                    <value>19303</value>
                </sharesOwnedFollowingTransaction>
            </postTransactionAmounts>
            <ownershipNature>
                <directOrIndirectOwnership>
                    <value>D</value>
                </directOrIndirectOwnership>
            </ownershipNature>
        </nonDerivativeTransaction>
    </nonDerivativeTable>

    <footnotes>
        <footnote id="F1">The transactions reported herein were effected pursuant to the Reporting Person's Rule 10b5-1 trading plan, adopted on March 27, 2023.</footnote>
        <footnote id="F2">This transaction was executed in multiple trades in prices ranging from $25.00 to $25.105, 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.</footnote>
    </footnotes>

    <ownerSignature>
        <signatureName>/s/ Jason Throne, as Attorney-in-Fact for Paul A. Stone</signatureName>
        <signatureDate>2023-08-11</signatureDate>
    </ownerSignature>
</ownershipDocument>
</XML>
</TEXT>
</DOCUMENT>
</SEC-DOCUMENT>
