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

    <schemaVersion>X0508</schemaVersion>

    <documentType>4</documentType>

    <periodOfReport>2023-07-31</periodOfReport>

    <notSubjectToSection16>0</notSubjectToSection16>

    <issuer>
        <issuerCik>0000006207</issuerCik>
        <issuerName>AMREP CORP.</issuerName>
        <issuerTradingSymbol>AXR</issuerTradingSymbol>
    </issuer>

    <reportingOwner>
        <reportingOwnerId>
            <rptOwnerCik>0001105838</rptOwnerCik>
            <rptOwnerName>ROBOTTI ROBERT</rptOwnerName>
        </reportingOwnerId>
        <reportingOwnerAddress>
            <rptOwnerStreet1>125 PARK AVENUE</rptOwnerStreet1>
            <rptOwnerStreet2>SUITE 1607</rptOwnerStreet2>
            <rptOwnerCity>NEW YORK</rptOwnerCity>
            <rptOwnerState>NY</rptOwnerState>
            <rptOwnerZipCode>10017</rptOwnerZipCode>
            <rptOwnerStateDescription></rptOwnerStateDescription>
        </reportingOwnerAddress>
        <reportingOwnerRelationship>
            <isDirector>1</isDirector>
            <isOfficer>0</isOfficer>
            <isTenPercentOwner>0</isTenPercentOwner>
            <isOther>0</isOther>
        </reportingOwnerRelationship>
    </reportingOwner>

    <aff10b5One>0</aff10b5One>

    <nonDerivativeTable>
        <nonDerivativeTransaction>
            <securityTitle>
                <value>Common Stock, $0.10 Par Value</value>
            </securityTitle>
            <transactionDate>
                <value>2023-07-31</value>
            </transactionDate>
            <transactionCoding>
                <transactionFormType>4</transactionFormType>
                <transactionCode>P</transactionCode>
                <equitySwapInvolved>0</equitySwapInvolved>
            </transactionCoding>
            <transactionTimeliness>
                <value></value>
            </transactionTimeliness>
            <transactionAmounts>
                <transactionShares>
                    <value>1752</value>
                </transactionShares>
                <transactionPricePerShare>
                    <value>16.5244</value>
                </transactionPricePerShare>
                <transactionAcquiredDisposedCode>
                    <value>A</value>
                </transactionAcquiredDisposedCode>
            </transactionAmounts>
            <postTransactionAmounts>
                <sharesOwnedFollowingTransaction>
                    <value>286505</value>
                    <footnoteId id="F1"/>
                </sharesOwnedFollowingTransaction>
            </postTransactionAmounts>
            <ownershipNature>
                <directOrIndirectOwnership>
                    <value>I</value>
                </directOrIndirectOwnership>
                <natureOfOwnership>
                    <value>See Footnote</value>
                    <footnoteId id="F2"/>
                </natureOfOwnership>
            </ownershipNature>
        </nonDerivativeTransaction>
    </nonDerivativeTable>

    <footnotes>
        <footnote id="F1">This amount includes 156,636 shares of the Common Stock, $0.10 par value (the &quot;Common Stock&quot;) directly owned by The Ravenswood Investment Company, LP (&quot;RIC&quot;) and 129,869 shares of the Common Stock directly owned by Ravenswood Investments III, L.P. (&quot;RI&quot;).</footnote>
        <footnote id="F2">Mr. Robotti may be deemed to beneficially own (solely for the purpose of Rule 16a-1(a)(2) under the Securities Exchange Act of 1934, as amended (&quot;Exchange Act&quot;)) certain of the shares of Common Stock set forth in this Form 4 as managing director of Ravenswood Management Company, LLC, which serves as the general partner of RIC and RI.  Mr. Robotti disclaims beneficial ownership of all securities reported herein except to the extent of any pecuniary interest therein, if any.</footnote>
    </footnotes>

    <ownerSignature>
        <signatureName>/s/ Robert E. Robotti</signatureName>
        <signatureDate>2023-07-31</signatureDate>
    </ownerSignature>
</ownershipDocument>
