SEC EDGAR · Insider purchase
XGN: Chernett Jorey reported buying shares
2 reported purchases of non-derivative securities. Code P includes open-market and private purchases; it does not establish motive.
Follow XGN- Became public
- Nov 10, 2026, 8:04 PM EST
- Event / period date
- Nov 9, 2026
- Collected
- Nov 10, 2026, 8:06 PM EST
Why this is connected
This filing identifies EXAGEN INC. as the issuer of the security. The company's SEC identifier connects it to XGN.
Reported transactions
Chernett Jorey (10% owner)
8,500 shares · Common Stock
Nov 9, 2026 · $6.35 per share
7,085 shares · Common Stock
Nov 10, 2026 · $5.26 per share
Value calculated from the reported shares and prices: $91,242.10.
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>0001274737</issuerCik>
<issuerName>EXAGEN INC.</issuerName>
<issuerTradingSymbol>XGN</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>11265</value>
</transactionShares>
<transactionPricePerShare>
<value>6.14</value>
<footnoteId id="F1"/>
<footnoteId id="F2"/>
</transactionPricePerShare>
<transactionAcquiredDisposedCode>
<value>D</value>
</transactionAcquiredDisposedCode>
</transactionAmounts>
<postTransactionAmounts>
<sharesOwnedFollowingTransaction>
<value>2610040</value>
<footnoteId id="F3"/>
</sharesOwnedFollowingTransaction>
</postTransactionAmounts>
<ownershipNature>
<directOrIndirectOwnership>
<value>D</value>
</directOrIndirectOwnership>
</ownershipNature>
</nonDerivativeTransaction>
<nonDerivativeTransaction>
<securityTitle>
<value>Common Stock</value>
</securityTitle>
<transactionDate>
<value>2026-11-09</value>
</transactionDate>
<deemedExecutionDate></deemedExecutionDate>
<transactionCoding>
<transactionFormType>4</transactionFormType>
<transactionCode>P</transactionCode>
<equitySwapInvolved>0</equitySwapInvolved>
</transactionCoding>
<transactionTimeliness></transactionTimeliness>
<transactionAmounts>
<transactionShares>
<value>8500</value>
</transactionShares>
<transactionPricePerShare>
<value>6.35</value>
<footnoteId id="F2"/>
<footnoteId id="F4"/>
</transactionPricePerShare>
<transactionAcquiredDisposedCode>
<value>A</value>
</transactionAcquiredDisposedCode>
</transactionAmounts>
<postTransactionAmounts>
<sharesOwnedFollowingTransaction>
<value>2618540</value>
</sharesOwnedFollowingTransaction>
</postTransactionAmounts>
<ownershipNature>
<directOrIndirectOwnership>
<value>D</value>
</directOrIndirectOwnership>
</ownershipNature>
</nonDerivativeTransaction>
<nonDerivativeTransaction>
<securityTitle>
<value>Common Stock</value>
</securityTitle>
<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>7085</value>
</transactionShares>
<transactionPricePerShare>
<value>5.26</value>
<footnoteId id="F2"/>
</transactionPricePerShare>
<transactionAcquiredDisposedCode>
<value>A</value>
</transactionAcquiredDisposedCode>
</transactionAmounts>
<postTransactionAmounts>
<sharesOwnedFollowingTransaction>
<value>2625625</value>
</sharesOwnedFollowingTransaction>
</postTransactionAmounts>
<ownershipNature>
<directOrIndirectOwnership>
<value>D</value>
</directOrIndirectOwnership>
</ownershipNature>
</nonDerivativeTransaction>
</nonDerivativeTable>
<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 $5.86 to $6.18, 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">This amount corrects a clerical error in the Reporting Person's previously filed Form 4 in which the number of shares beneficially owned by the Reporting Person was under-reported by 2,765 shares.</footnote>
<footnote id="F4">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 $5.26 to $7.00, 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>
</footnotes>
<ownerSignature>
<signatureName>/s/ Jorey Chernett</signatureName>
<signatureDate>2026-11-10</signatureDate>
</ownerSignature>
</ownershipDocument>Original documents control. Public records can be amended, and company connections may require interpretation. Nothing here is investment advice.