SEC EDGAR · Insider purchase
NTHI: Heshmatpour Amir F reported buying shares
3 reported purchases of non-derivative securities. Code P includes open-market and private purchases; it does not establish motive.
Follow NTHI- Became public
- Nov 12, 2026, 6:10 AM EST
- Event / period date
- Nov 10, 2026
- Collected
- Nov 12, 2026, 6:16 AM EST
Why this is connected
This filing identifies NEONC TECHNOLOGIES HOLDINGS, INC. as the issuer of the security. The company's SEC identifier connects it to NTHI.
Reported transactions
Heshmatpour Amir F (CEO, President)
50,000 shares · Common Stock
Nov 10, 2026 · $4.192 per share
10,000 shares · Common Stock
Nov 11, 2026 · $4.49 per share
10,000 shares · Common Stock
Nov 11, 2026 · $4.00 per share
Value calculated from the reported shares and prices: $294,500.00.
Code P covers open-market and private purchases. Grants, option exercises, and tax withholding are excluded from purchase results. Read the source footnotes for ownership and pricing details.
Source evidence
Read the source excerpt or record
<?xml version="1.0"?>
<ownershipDocument>
<schemaVersion>X0609</schemaVersion>
<documentType>4</documentType>
<periodOfReport>2026-11-10</periodOfReport>
<issuer>
<issuerCik>0001979414</issuerCik>
<issuerName>NEONC TECHNOLOGIES HOLDINGS, INC.</issuerName>
<issuerTradingSymbol>NTHI</issuerTradingSymbol>
<issuerForeignTradingSymbol></issuerForeignTradingSymbol>
</issuer>
<reportingOwner>
<reportingOwnerId>
<rptOwnerCik>0001443035</rptOwnerCik>
<rptOwnerName>Heshmatpour Amir F</rptOwnerName>
</reportingOwnerId>
<reportingOwnerAddress>
<rptOwnerNonUSAddressFlag>false</rptOwnerNonUSAddressFlag>
<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>true</isOfficer>
<isTenPercentOwner>true</isTenPercentOwner>
<isOther>false</isOther>
<officerTitle>CEO, President</officerTitle>
<otherText></otherText>
</reportingOwnerRelationship>
</reportingOwner>
<aff10b5One>0</aff10b5One>
<nonDerivativeTable>
<nonDerivativeTransaction>
<securityTitle>
<value>Common Stock</value>
</securityTitle>
<transactionDate>
<value>2026-11-10</value>
</transactionDate>
<deemedExecutionDate></deemedExecutionDate>
<transactionCoding>
<transactionFormType>4</transactionFormType>
<transactionCode>P</transactionCode>
<equitySwapInvolved>false</equitySwapInvolved>
</transactionCoding>
<transactionTimeliness></transactionTimeliness>
<transactionAmounts>
<transactionShares>
<value>50000</value>
<footnoteId id="F1"/>
</transactionShares>
<transactionPricePerShare>
<value>4.192</value>
<footnoteId id="F2"/>
</transactionPricePerShare>
<transactionAcquiredDisposedCode>
<value>A</value>
</transactionAcquiredDisposedCode>
</transactionAmounts>
<postTransactionAmounts>
<sharesOwnedFollowingTransaction>
<value>3313000</value>
<footnoteId id="F3"/>
</sharesOwnedFollowingTransaction>
</postTransactionAmounts>
<ownershipNature>
<directOrIndirectOwnership>
<value>D</value>
</directOrIndirectOwnership>
</ownershipNature>
</nonDerivativeTransaction>
<nonDerivativeTransaction>
<securityTitle>
<value>Common Stock</value>
</securityTitle>
<transactionDate>
<value>2026-11-11</value>
</transactionDate>
<deemedExecutionDate></deemedExecutionDate>
<transactionCoding>
<transactionFormType>4</transactionFormType>
<transactionCode>P</transactionCode>
<equitySwapInvolved>false</equitySwapInvolved>
</transactionCoding>
<transactionTimeliness></transactionTimeliness>
<transactionAmounts>
<transactionShares>
<value>10000</value>
</transactionShares>
<transactionPricePerShare>
<value>4.49</value>
</transactionPricePerShare>
<transactionAcquiredDisposedCode>
<value>A</value>
</transactionAcquiredDisposedCode>
</transactionAmounts>
<postTransactionAmounts>
<sharesOwnedFollowingTransaction>
<value>3323000</value>
<footnoteId id="F3"/>
</sharesOwnedFollowingTransaction>
</postTransactionAmounts>
<ownershipNature>
<directOrIndirectOwnership>
<value>D</value>
</directOrIndirectOwnership>
</ownershipNature>
</nonDerivativeTransaction>
<nonDerivativeHolding>
<securityTitle>
<value>Common Stock</value>
</securityTitle>
<postTransactionAmounts>
<sharesOwnedFollowingTransaction>
<value>256120</value>
<footnoteId id="F4"/>
</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>550000</value>
<footnoteId id="F5"/>
</sharesOwnedFollowingTransaction>
</postTransactionAmounts>
<ownershipNature>
<directOrIndirectOwnership>
<value>I</value>
</directOrIndirectOwnership>
<natureOfOwnership>
<value>By KIG LLC</value>
</natureOfOwnership>
</ownershipNature>
</nonDerivativeHolding>
<nonDerivativeHolding>
<securityTitle>
<value>Common Stock</value>
</securityTitle>
<postTransactionAmounts>
<sharesOwnedFollowingTransaction>
<value>3714020</value>
<footnoteId id="F6"/>
</sharesOwnedFollowingTransaction>
</postTransactionAmounts>
<ownershipNature>
<directOrIndirectOwnership>
<value>I</value>
</directOrIndirectOwnership>
<natureOfOwnership>
<value>By AFH Holdings & Advisory, LLC.</value>
</natureOfOwnership>
</ownershipNature>
</nonDerivativeHolding>
<nonDerivativeTransaction>
<securityTitle>
<value>Common Stock</value>
</securityTitle>
<transactionDate>
<value>2026-11-11</value>
</transactionDate>
<deemedExecutionDate></deemedExecutionDate>
<transactionCoding>
<transactionFormType>4</transactionFormType>
<transactionCode>P</transactionCode>
<equitySwapInvolved>false</equitySwapInvolved>
</transactionCoding>
<transactionTimeliness></transactionTimeliness>
<transactionAmounts>
<transactionShares>
<value>10000</value>
</transactionShares>
<transactionPricePerShare>
<value>4</value>
</transactionPricePerShare>
<transactionAcquiredDisposedCode>
<value>A</value>
</transactionAcquiredDisposedCode>
</transactionAmounts>
<postTransactionAmounts>
<sharesOwnedFollowingTransaction>
<value>3333000</value>
</sharesOwnedFollowingTransaction>
</postTransactionAmounts>
<ownershipNature>
<directOrIndirectOwnership>
<value>D</value>
</directOrIndirectOwnership>
</ownershipNature>
</nonDerivativeTransaction>
<nonDerivativeHolding>
<securityTitle>
<value>Common Stock</value>
</securityTitle>
<postTransactionAmounts>
<sharesOwnedFollowingTransaction>
<value>256120</value>
<footnoteId id="F4"/>
</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>550000</value>
<footnoteId id="F5"/>
</sharesOwnedFollowingTransaction>
</postTransactionAmounts>
<ownershipNature>
<directOrIndirectOwnership>
<value>I</value>
</directOrIndirectOwnership>
<natureOfOwnership>
<value>By KIG LLC</value>
</natureOfOwnership>
</ownershipNature>
</nonDerivativeHolding>
<nonDerivativeHolding>
<securityTitle>
<value>Common Stock</value>
</securityTitle>
<postTransactionAmounts>
<sharesOwnedFollowingTransaction>
<value>3714020</value>
<footnoteId id="F6"/>
</sharesOwnedFollowingTransaction>
</postTransactionAmounts>
<ownershipNature>
<directOrIndirectOwnership>
<value>I</value>
</directOrIndirectOwnership>
<natureOfOwnership>
<value>By AFH Holdings & Advisory, LLC.</value>
</natureOfOwnership>
</ownershipNature>
</nonDerivativeHolding>
</nonDerivativeTable>
<derivativeTable></derivativeTable>
<footnotes>
<footnote id="F1">The aggregate number of shares (the "Shares") of common stock of Issuer purchased by the Reporting Person on the same date at different prices.</footnote>
<footnote id="F2">Represents the weighted average purchase price. The Shares were purchased at prices ranging from $3.92 to $4.42 per share. Full information regarding the number of Shares purchased at each price shall be provided to the Securities and Exchange Commission staff, Issuer or any security holder, upon request.</footnote>
<footnote id="F3">Includes 275,000 shares held by certain members of Reporting Person's immediate family of which Reporting Person disclaims beneficial ownership, except to the extent of his pecuniary interest, if any, therein.</footnote>
<footnote id="F4">Such shares represent only Reporting Person's proportionate interest in HCWG LLC.</footnote>
<footnote id="F5">Such shares are held by KIG LLC of which Reporting Person's spouse is the sole member. Reporting Person disclaims beneficial ownership of such shares except to the extent of his pecuniary interest, if any, therein.</footnote>
<footnote id="F6">Reporting Person is the sole member and manager of AFH Holding & Advisory, LLC.</footnote>
</footnotes>
<remarks></remarks>
<ownerSignature>
<signatureName>/S/ AMIR F HESHMATPOUR</signatureName>
<signatureDate>2026-11-12</signatureDate>
</ownerSignature>
</ownershipDocument>Original documents control. Public records can be amended, and company connections may require interpretation. Nothing here is investment advice.