SEC EDGAR · Insider purchase
STLN: Chernett Jorey reported buying shares
1 reported purchase of non-derivative securities. Code P includes open-market and private purchases; it does not establish motive.
Follow STLN- Became public
- Nov 10, 2026, 6:33 PM EST
- Event / period date
- Nov 9, 2026
- Collected
- Nov 10, 2026, 6:36 PM EST
Why this is connected
This filing identifies Starling Oncology, Inc. as the issuer of the security. The company's SEC identifier connects it to STLN.
Reported transactions
Chernett Jorey (10% owner)
48,294 shares · Common Stock
Nov 9, 2026 · $3.65 per share
Value calculated from the reported shares and prices: $176,273.10.
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>2026-11-06</periodOfReport>
<notSubjectToSection16>0</notSubjectToSection16>
<issuer>
<issuerCik>0001799191</issuerCik>
<issuerName>Starling Oncology, Inc.</issuerName>
<issuerTradingSymbol>STLN</issuerTradingSymbol>
<issuerForeignTradingSymbol></issuerForeignTradingSymbol>
</issuer>
<reportingOwner>
<reportingOwnerId>
<rptOwnerCik>0002042077</rptOwnerCik>
<rptOwnerName>Chernett Jorey</rptOwnerName>
</reportingOwnerId>
<reportingOwnerAddress>
<rptOwnerNonUSAddressFlag>false</rptOwnerNonUSAddressFlag>
<rptOwnerStreet1>6222 INDIANWOOD TR.</rptOwnerStreet1>
<rptOwnerStreet2></rptOwnerStreet2>
<rptOwnerCity>BLOOMFIELD HILLS</rptOwnerCity>
<rptOwnerState>MI</rptOwnerState>
<rptOwnerZipCode>48301</rptOwnerZipCode>
<rptOwnerStateDescription></rptOwnerStateDescription>
</reportingOwnerAddress>
<reportingOwnerRelationship>
<isDirector>0</isDirector>
<isOfficer>0</isOfficer>
<isTenPercentOwner>1</isTenPercentOwner>
<isOther>0</isOther>
<officerTitle></officerTitle>
<otherText></otherText>
</reportingOwnerRelationship>
</reportingOwner>
<aff10b5One>0</aff10b5One>
<nonDerivativeTable>
<nonDerivativeTransaction>
<securityTitle>
<value>Common Stock</value>
</securityTitle>
<transactionDate>
<value>2026-11-06</value>
</transactionDate>
<deemedExecutionDate></deemedExecutionDate>
<transactionCoding>
<transactionFormType>4</transactionFormType>
<transactionCode>S</transactionCode>
<equitySwapInvolved>0</equitySwapInvolved>
</transactionCoding>
<transactionTimeliness></transactionTimeliness>
<transactionAmounts>
<transactionShares>
<value>2851061</value>
</transactionShares>
<transactionPricePerShare>
<value>3.99</value>
<footnoteId id="F1"/>
<footnoteId id="F2"/>
</transactionPricePerShare>
<transactionAcquiredDisposedCode>
<value>D</value>
</transactionAcquiredDisposedCode>
</transactionAmounts>
<postTransactionAmounts>
<sharesOwnedFollowingTransaction>
<value>7809797</value>
</sharesOwnedFollowingTransaction>
</postTransactionAmounts>
<ownershipNature>
<directOrIndirectOwnership>
<value>D</value>
</directOrIndirectOwnership>
</ownershipNature>
</nonDerivativeTransaction>
<nonDerivativeTransaction>
<securityTitle>
<value>Common Stock</value>
</securityTitle>
<transactionDate>
<value>2026-11-09</value>
</transactionDate>
<deemedExecutionDate></deemedExecutionDate>
<transactionCoding>
<transactionFormType>4</transactionFormType>
<transactionCode>P</transactionCode>
<equitySwapInvolved>0</equitySwapInvolved>
</transactionCoding>
<transactionTimeliness></transactionTimeliness>
<transactionAmounts>
<transactionShares>
<value>48294</value>
</transactionShares>
<transactionPricePerShare>
<value>3.65</value>
<footnoteId id="F2"/>
<footnoteId id="F3"/>
</transactionPricePerShare>
<transactionAcquiredDisposedCode>
<value>A</value>
</transactionAcquiredDisposedCode>
</transactionAmounts>
<postTransactionAmounts>
<sharesOwnedFollowingTransaction>
<value>7858091</value>
</sharesOwnedFollowingTransaction>
</postTransactionAmounts>
<ownershipNature>
<directOrIndirectOwnership>
<value>D</value>
</directOrIndirectOwnership>
</ownershipNature>
</nonDerivativeTransaction>
</nonDerivativeTable>
<derivativeTable>
<derivativeTransaction>
<securityTitle>
<value>Call Option (STLN 20NOV26 $4C)</value>
<footnoteId id="F2"/>
</securityTitle>
<conversionOrExercisePrice>
<value>4</value>
</conversionOrExercisePrice>
<transactionDate>
<value>2026-11-06</value>
</transactionDate>
<deemedExecutionDate></deemedExecutionDate>
<transactionCoding>
<transactionFormType>4</transactionFormType>
<transactionCode>P</transactionCode>
<equitySwapInvolved>0</equitySwapInvolved>
</transactionCoding>
<transactionTimeliness></transactionTimeliness>
<transactionAmounts>
<transactionShares>
<value>10000</value>
</transactionShares>
<transactionPricePerShare>
<value>0.075</value>
</transactionPricePerShare>
<transactionAcquiredDisposedCode>
<value>A</value>
</transactionAcquiredDisposedCode>
</transactionAmounts>
<exerciseDate>
<value>2026-11-06</value>
</exerciseDate>
<expirationDate>
<value>2026-11-20</value>
</expirationDate>
<underlyingSecurity>
<underlyingSecurityTitle>
<value>Common Stock</value>
</underlyingSecurityTitle>
<underlyingSecurityShares>
<value>1000000</value>
</underlyingSecurityShares>
</underlyingSecurity>
<postTransactionAmounts>
<sharesOwnedFollowingTransaction>
<value>10000</value>
</sharesOwnedFollowingTransaction>
</postTransactionAmounts>
<ownershipNature>
<directOrIndirectOwnership>
<value>D</value>
</directOrIndirectOwnership>
</ownershipNature>
</derivativeTransaction>
<derivativeTransaction>
<securityTitle>
<value>Call Option (STLN 19FEB27 $4C)</value>
<footnoteId id="F2"/>
</securityTitle>
<conversionOrExercisePrice>
<value>4</value>
</conversionOrExercisePrice>
<transactionDate>
<value>2026-11-06</value>
</transactionDate>
<deemedExecutionDate></deemedExecutionDate>
<transactionCoding>
<transactionFormType>4</transactionFormType>
<transactionCode>P</transactionCode>
<equitySwapInvolved>0</equitySwapInvolved>
</transactionCoding>
<transactionTimeliness></transactionTimeliness>
<transactionAmounts>
<transactionShares>
<value>5000</value>
</transactionShares>
<transactionPricePerShare>
<value>0.40</value>
</transactionPricePerShare>
<transactionAcquiredDisposedCode>
<value>A</value>
</transactionAcquiredDisposedCode>
</transactionAmounts>
<exerciseDate>
<value>2026-11-06</value>
</exerciseDate>
<expirationDate>
<value>2027-02-19</value>
</expirationDate>
<underlyingSecurity>
<underlyingSecurityTitle>
<value>Common Stock</value>
</underlyingSecurityTitle>
<underlyingSecurityShares>
<value>500000</value>
</underlyingSecurityShares>
</underlyingSecurity>
<postTransactionAmounts>
<sharesOwnedFollowingTransaction>
<value>5000</value>
</sharesOwnedFollowingTransaction>
</postTransactionAmounts>
<ownershipNature>
<directOrIndirectOwnership>
<value>D</value>
</directOrIndirectOwnership>
</ownershipNature>
</derivativeTransaction>
<derivativeTransaction>
<securityTitle>
<value>Call Option (STLN 19FEB27 $5C)</value>
<footnoteId id="F2"/>
</securityTitle>
<conversionOrExercisePrice>
<value>5</value>
</conversionOrExercisePrice>
<transactionDate>
<value>2026-11-09</value>
</transactionDate>
<deemedExecutionDate></deemedExecutionDate>
<transactionCoding>
<transactionFormType>4</transactionFormType>
<transactionCode>P</transactionCode>
<equitySwapInvolved>0</equitySwapInvolved>
</transactionCoding>
<transactionTimeliness></transactionTimeliness>
<transactionAmounts>
<transactionShares>
<value>7500</value>
</transactionShares>
<transactionPricePerShare>
<value>0.5357</value>
<footnoteId id="F4"/>
</transactionPricePerShare>
<transactionAcquiredDisposedCode>
<value>A</value>
</transactionAcquiredDisposedCode>
</transactionAmounts>
<exerciseDate>
<value>2026-11-09</value>
</exerciseDate>
<expirationDate>
<value>2027-02-19</value>
</expirationDate>
<underlyingSecurity>
<underlyingSecurityTitle>
<value>Common Stock</value>
</underlyingSecurityTitle>
<underlyingSecurityShares>
<value>750000</value>
</underlyingSecurityShares>
</underlyingSecurity>
<postTransactionAmounts>
<sharesOwnedFollowingTransaction>
<value>7500</value>
</sharesOwnedFollowingTransaction>
</postTransactionAmounts>
<ownershipNature>
<directOrIndirectOwnership>
<value>D</value>
</directOrIndirectOwnership>
</ownershipNature>
</derivativeTransaction>
<derivativeTransaction>
<securityTitle>
<value>Call Option (STLN 21MAY27 $5C)</value>
<footnoteId id="F2"/>
</securityTitle>
<conversionOrExercisePrice>
<value>5</value>
</conversionOrExercisePrice>
<transactionDate>
<value>2026-11-10</value>
</transactionDate>
<deemedExecutionDate></deemedExecutionDate>
<transactionCoding>
<transactionFormType>4</transactionFormType>
<transactionCode>P</transactionCode>
<equitySwapInvolved>0</equitySwapInvolved>
</transactionCoding>
<transactionTimeliness></transactionTimeliness>
<transactionAmounts>
<transactionShares>
<value>7000</value>
</transactionShares>
<transactionPricePerShare>
<value>0.67</value>
</transactionPricePerShare>
<transactionAcquiredDisposedCode>
<value>A</value>
</transactionAcquiredDisposedCode>
</transactionAmounts>
<exerciseDate>
<value>2026-11-10</value>
</exerciseDate>
<expirationDate>
<value>2027-05-21</value>
</expirationDate>
<underlyingSecurity>
<underlyingSecurityTitle>
<value>Common Stock</value>
</underlyingSecurityTitle>
<underlyingSecurityShares>
<value>700000</value>
</underlyingSecurityShares>
</underlyingSecurity>
<postTransactionAmounts>
<sharesOwnedFollowingTransaction>
<value>7000</value>
</sharesOwnedFollowingTransaction>
</postTransactionAmounts>
<ownershipNature>
<directOrIndirectOwnership>
<value>D</value>
</directOrIndirectOwnership>
</ownershipNature>
</derivativeTransaction>
</derivativeTable>
<footnotes>
<footnote id="F1">The price reported in Column 4 is a weighted average price, rounded to the nearest cent. These shares were sold in multiple transactions at prices ranging from $3.38 to $5.21, rounded to the nearest cent, inclusive. Mr. Chernett undertakes to provide the Issuer and any security holder of the Issuer, or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price such shares were sold.</footnote>
<footnote id="F2">The reported transactions are matchable transactions subject to Section 16(b) of the Securities Exchange Act of 1934. The reporting person has calculated a short-swing profit in connection with such matchable transactions, which the reporting person intends to disgorge to the Issuer.</footnote>
<footnote id="F3">The price reported in Column 4 is a weighted average price, rounded to the nearest cent. These shares were purchased in multiple transactions at prices ranging from $3.53 to $3.91, rounded to the nearest cent, inclusive. Mr. Chernett undertakes to provide the Issuer and any security holder of the Issuer, or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares purchased at each separate price such shares were purchased.</footnote>
<footnote id="F4">The price reported in Column 8 is a weighted average price. These Call Options were purchased in multiple transactions at prices ranging from $0.4998 to $0.55, inclusive. Mr. Chernett undertakes to provide the Issuer and any security holder of the Issuer, or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of Call Options purchased at each separate price such Call Options were purchased.</footnote>
</footnotes>
<ownerSignature>
<signatureName>/s/ Jorey Chernett</signatureName>
<signatureDate>2026-11-10</signatureDate>
</ownerSignature>
</ownershipDocument>Congressional trading in STLN
These disclosures provide context. Their presence does not establish a link between a trader and the event.
DisclosedTradeAmount
- Oct 26, 2026$1K–$15K
Sen. Richard Blumenthal (D-CT)
Sold (partial) Starling Oncology STLN
$1K–$15K · Traded Sep 23, 2026 · disclosed Oct 26, 2026 · Spouse
- Oct 26, 2026$1K–$15K
Sen. Richard Blumenthal (D-CT)
Sold (partial) Starling Oncology STLN
$1K–$15K · Traded Sep 23, 2026 · disclosed Oct 26, 2026 · Spouse
- Oct 26, 2026$15K–$50K
Sen. Richard Blumenthal (D-CT)
Sold (partial) Starling Oncology STLN
$15K–$50K · Traded Sep 22, 2026 · disclosed Oct 26, 2026 · Spouse
- Oct 26, 2026$1K–$15K
Sen. Richard Blumenthal (D-CT)
Sold (partial) Starling Oncology STLN
$1K–$15K · Traded Sep 22, 2026 · disclosed Oct 26, 2026 · Spouse
- Oct 26, 2026$15K–$50K
Sen. Richard Blumenthal (D-CT)
Sold (partial) Starling Oncology STLN
$15K–$50K · Traded Sep 22, 2026 · disclosed Oct 26, 2026 · Spouse
- Oct 26, 2026$15K–$50K
Sen. Richard Blumenthal (D-CT)
Sold (partial) Starling Oncology STLN
$15K–$50K · Traded Sep 22, 2026 · disclosed Oct 26, 2026 · Spouse
- Oct 26, 2026$1K–$15K
Sen. Richard Blumenthal (D-CT)
Sold (partial) Starling Oncology STLN
$1K–$15K · Traded Sep 22, 2026 · disclosed Oct 26, 2026 · Spouse
- Oct 26, 2026$15K–$50K
Sen. Richard Blumenthal (D-CT)
Sold (partial) Starling Oncology STLN
$15K–$50K · Traded Sep 18, 2026 · disclosed Oct 26, 2026 · Spouse
Original documents control. Public records can be amended, and company connections may require interpretation. Nothing here is investment advice.