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

    <schemaVersion>X0607</schemaVersion>

    <documentType>3</documentType>

    <periodOfReport>2012-04-23</periodOfReport>

    <noSecuritiesOwned>1</noSecuritiesOwned>

    <issuer>
        <issuerCik>0000355019</issuerCik>
        <issuerName>FONAR CORP</issuerName>
        <issuerTradingSymbol>FONR</issuerTradingSymbol>
    </issuer>

    <reportingOwner>
        <reportingOwnerId>
            <rptOwnerCik>0002139585</rptOwnerCik>
            <rptOwnerName>Lehman Ronald G.</rptOwnerName>
        </reportingOwnerId>
        <reportingOwnerAddress>
            <rptOwnerNonUSAddressFlag>false</rptOwnerNonUSAddressFlag>
            <rptOwnerStreet1>C/O FONAR CORP</rptOwnerStreet1>
            <rptOwnerStreet2>110 MARCUS DRIVE</rptOwnerStreet2>
            <rptOwnerCity>MELVILLE</rptOwnerCity>
            <rptOwnerState>NY</rptOwnerState>
            <rptOwnerZipCode>11747</rptOwnerZipCode>
            <rptOwnerStateDescription></rptOwnerStateDescription>
        </reportingOwnerAddress>
        <reportingOwnerRelationship>
            <isDirector>1</isDirector>
            <isOfficer>0</isOfficer>
            <isTenPercentOwner>0</isTenPercentOwner>
            <isOther>0</isOther>
        </reportingOwnerRelationship>
    </reportingOwner>

    <remarks>This Form 3 is being filed on a delinquent basis.  The reporting person was appointed to the board of directors of the issuer on April 23, 2012, upon which this Form 3 was required to be filed within ten days pursuant to Section 16(a) of the Securities Exchange Act of 1934, as amended.   The delay in filing was inadvertent and due to administrative oversight.</remarks>

    <ownerSignature>
        <signatureName>/s/ Ronald G. Lehman II</signatureName>
        <signatureDate>2026-06-09</signatureDate>
    </ownerSignature>
</ownershipDocument>
