<?xml version="1.0"?>
<ownershipDocument>

    <schemaVersion>X0206</schemaVersion>

    <documentType>3</documentType>

    <periodOfReport>2018-01-02</periodOfReport>

    <noSecuritiesOwned>1</noSecuritiesOwned>

    <issuer>
        <issuerCik>0001228627</issuerCik>
        <issuerName>REXAHN PHARMACEUTICALS, INC.</issuerName>
        <issuerTradingSymbol>RNN</issuerTradingSymbol>
    </issuer>

    <reportingOwner>
        <reportingOwnerId>
            <rptOwnerCik>0001375884</rptOwnerCik>
            <rptOwnerName>Swirsky Douglas J</rptOwnerName>
        </reportingOwnerId>
        <reportingOwnerAddress>
            <rptOwnerStreet1>C/O REXAHN PHARMACEUTICALS, INC.</rptOwnerStreet1>
            <rptOwnerStreet2>15245 SHADY GROVE ROAD, SUITE 455</rptOwnerStreet2>
            <rptOwnerCity>ROCKVILLE</rptOwnerCity>
            <rptOwnerState>MD</rptOwnerState>
            <rptOwnerZipCode>20850</rptOwnerZipCode>
            <rptOwnerStateDescription></rptOwnerStateDescription>
        </reportingOwnerAddress>
        <reportingOwnerRelationship>
            <isOfficer>true</isOfficer>
            <officerTitle>President and CFO</officerTitle>
        </reportingOwnerRelationship>
    </reportingOwner>

    <remarks>No securities are beneficially owned by the reporting person.</remarks>

    <ownerSignature>
        <signatureName>/s/ Douglas J. Swirsky</signatureName>
        <signatureDate>2018-01-04</signatureDate>
    </ownerSignature>
</ownershipDocument>
