<SEC-DOCUMENT>0001213900-25-114266.txt : 20251124
<SEC-HEADER>0001213900-25-114266.hdr.sgml : 20251124
<ACCEPTANCE-DATETIME>20251124181312
ACCESSION NUMBER:		0001213900-25-114266
CONFORMED SUBMISSION TYPE:	3
PUBLIC DOCUMENT COUNT:		1
CONFORMED PERIOD OF REPORT:	20251112
FILED AS OF DATE:		20251124
DATE AS OF CHANGE:		20251124

REPORTING-OWNER:	

	OWNER DATA:	
		COMPANY CONFORMED NAME:			CHIANG MING-FU (ALAN)
		CENTRAL INDEX KEY:			0002055126
		ORGANIZATION NAME:           	

	FILING VALUES:
		FORM TYPE:		3
		SEC ACT:		1934 Act
		SEC FILE NUMBER:	001-42567
		FILM NUMBER:		251514509

	MAIL ADDRESS:	
		STREET 1:		2 DOLE DRIVE
		CITY:			WESTLAKE VILLAGE
		STATE:			CA
		ZIP:			91362

ISSUER:		

	COMPANY DATA:	
		COMPANY CONFORMED NAME:			NEONC TECHNOLOGIES HOLDINGS, INC.
		CENTRAL INDEX KEY:			0001979414
		STANDARD INDUSTRIAL CLASSIFICATION:	PHARMACEUTICAL PREPARATIONS [2834]
		ORGANIZATION NAME:           	03 Life Sciences
		EIN:				921954864
		STATE OF INCORPORATION:			DE
		FISCAL YEAR END:			1231

	BUSINESS ADDRESS:	
		STREET 1:		23975 PARK SORRENTO
		STREET 2:		SUITE 205
		CITY:			CALABASAS
		STATE:			CA
		ZIP:			91302
		BUSINESS PHONE:		310 663 7831

	MAIL ADDRESS:	
		STREET 1:		23975 PARK SORRENTO
		STREET 2:		SUITE 205
		CITY:			CALABASAS
		STATE:			CA
		ZIP:			91302
</SEC-HEADER>
<DOCUMENT>
<TYPE>3
<SEQUENCE>1
<FILENAME>marketforms-71274.xml
<DESCRIPTION>PRIMARY DOCUMENT
<TEXT>
<XML>
<?xml version="1.0"?>
<ownershipDocument>

    <schemaVersion>X0206</schemaVersion>

    <documentType>3</documentType>

    <periodOfReport>2025-11-12</periodOfReport>

    <noSecuritiesOwned>0</noSecuritiesOwned>

    <issuer>
        <issuerCik>0001979414</issuerCik>
        <issuerName>NEONC TECHNOLOGIES HOLDINGS, INC.</issuerName>
        <issuerTradingSymbol>NTHI</issuerTradingSymbol>
    </issuer>

    <reportingOwner>
        <reportingOwnerId>
            <rptOwnerCik>0002055126</rptOwnerCik>
            <rptOwnerName>CHIANG MING-FU (ALAN)</rptOwnerName>
        </reportingOwnerId>
        <reportingOwnerAddress>
            <rptOwnerStreet1>23975 SORRENTO PARK</rptOwnerStreet1>
            <rptOwnerStreet2>SUITE 205</rptOwnerStreet2>
            <rptOwnerCity>CALABASAS</rptOwnerCity>
            <rptOwnerState>CA</rptOwnerState>
            <rptOwnerZipCode>91302</rptOwnerZipCode>
            <rptOwnerStateDescription></rptOwnerStateDescription>
        </reportingOwnerAddress>
        <reportingOwnerRelationship>
            <isDirector>true</isDirector>
            <isOfficer>false</isOfficer>
            <isTenPercentOwner>false</isTenPercentOwner>
            <isOther>false</isOther>
            <officerTitle></officerTitle>
            <otherText></otherText>
        </reportingOwnerRelationship>
    </reportingOwner>

    <nonDerivativeTable>
        <nonDerivativeHolding>
            <securityTitle>
                <value>Common Stock</value>
            </securityTitle>
            <postTransactionAmounts>
                <sharesOwnedFollowingTransaction>
                    <value>400216</value>
                </sharesOwnedFollowingTransaction>
            </postTransactionAmounts>
            <ownershipNature>
                <directOrIndirectOwnership>
                    <value>D</value>
                </directOrIndirectOwnership>
            </ownershipNature>
        </nonDerivativeHolding>
        <nonDerivativeHolding>
            <securityTitle>
                <value>Common Stock</value>
            </securityTitle>
            <postTransactionAmounts>
                <sharesOwnedFollowingTransaction>
                    <value>29309</value>
                    <footnoteId id="F1"/>
                </sharesOwnedFollowingTransaction>
            </postTransactionAmounts>
            <ownershipNature>
                <directOrIndirectOwnership>
                    <value>I</value>
                </directOrIndirectOwnership>
                <natureOfOwnership>
                    <value>By Orion Biomed Inc.</value>
                </natureOfOwnership>
            </ownershipNature>
        </nonDerivativeHolding>
        <nonDerivativeHolding>
            <securityTitle>
                <value>Common Stock</value>
            </securityTitle>
            <postTransactionAmounts>
                <sharesOwnedFollowingTransaction>
                    <value>888148</value>
                    <footnoteId id="F2"/>
                </sharesOwnedFollowingTransaction>
            </postTransactionAmounts>
            <ownershipNature>
                <directOrIndirectOwnership>
                    <value>I</value>
                </directOrIndirectOwnership>
                <natureOfOwnership>
                    <value>By NeuCen Biomedical Co. Ltd.</value>
                </natureOfOwnership>
            </ownershipNature>
        </nonDerivativeHolding>
        <nonDerivativeHolding>
            <securityTitle>
                <value>Common Stock</value>
            </securityTitle>
            <postTransactionAmounts>
                <sharesOwnedFollowingTransaction>
                    <value>384180</value>
                    <footnoteId id="F3"/>
                </sharesOwnedFollowingTransaction>
            </postTransactionAmounts>
            <ownershipNature>
                <directOrIndirectOwnership>
                    <value>I</value>
                </directOrIndirectOwnership>
                <natureOfOwnership>
                    <value>By HCWG LLC</value>
                </natureOfOwnership>
            </ownershipNature>
        </nonDerivativeHolding>
        <nonDerivativeHolding>
            <securityTitle>
                <value>Common Stock</value>
            </securityTitle>
            <postTransactionAmounts>
                <sharesOwnedFollowingTransaction>
                    <value>488196</value>
                    <footnoteId id="F4"/>
                </sharesOwnedFollowingTransaction>
            </postTransactionAmounts>
            <ownershipNature>
                <directOrIndirectOwnership>
                    <value>I</value>
                </directOrIndirectOwnership>
                <natureOfOwnership>
                    <value>See footnote 4.</value>
                </natureOfOwnership>
            </ownershipNature>
        </nonDerivativeHolding>
    </nonDerivativeTable>

    <derivativeTable></derivativeTable>

    <footnotes>
        <footnote id="F1">Such shares are owned by Orion Biomed Inc. (&quot;Orion&quot;). Orion is owned in part by Reporting Person, who disclaims beneficial ownership of such shares except to the extent of his pecuniary interest, if any, therein.</footnote>
        <footnote id="F2">Shares held by NeuCen Biomedical Co. Ltd. (&quot;NeuCen&quot;). NeuCen is owned in part by Reporting Person's spouse. Reporting Person disclaims beneficial ownership of such shares except to the extent of his pecuniary interest, if any, therein.</footnote>
        <footnote id="F3">Such shares are held by virtue of beneficial ownership of HCWG LLC, a Delaware limited liability company. The shares represent only Reporting Person's 37.5% interest in HCWG.</footnote>
        <footnote id="F4">Shares held by certain members of Reporting Person's family.  Reporting Person disclaims beneficial ownership of such shares, except to the extent of his pecuniary interest, if any, therein.</footnote>
    </footnotes>

    <remarks></remarks>

    <ownerSignature>
        <signatureName>/s/ Ming-Fu (Alan) Chiang</signatureName>
        <signatureDate>2025-11-24</signatureDate>
    </ownerSignature>
</ownershipDocument>
</XML>
</TEXT>
</DOCUMENT>
</SEC-DOCUMENT>
