<SUBMISSION>
<ACCESSION-NUMBER>0001252269-03-000003
<TYPE>4
<PUBLIC-DOCUMENT-COUNT>1
<PERIOD>20030729
<FILING-DATE>20030729
<ISSUER>
<COMPANY-DATA>
<CONFORMED-NAME>EXX INC/NV/
<CIK>0000089261
<ASSIGNED-SIC>3944
<IRS-NUMBER>880325271
<STATE-OF-INCORPORATION>NV
<FISCAL-YEAR-END>1231
</COMPANY-DATA>
<BUSINESS-ADDRESS>
<STREET1>1350 EAST FLAMINGO SUITE 689
<CITY>LAS VEGAS
<STATE>NV
<ZIP>89119
<PHONE>7025983223
</BUSINESS-ADDRESS>
<MAIL-ADDRESS>
<STREET1>1350 EAST FLAMINGO SUITE 689
<CITY>LAS VEGAS
<STATE>NV
<ZIP>89119
</MAIL-ADDRESS>
<FORMER-COMPANY>
<FORMER-CONFORMED-NAME>SFM CORP
<DATE-CHANGED>19920703
</FORMER-COMPANY>
</ISSUER>
<REPORTING-OWNER>
<OWNER-DATA>
<CONFORMED-NAME>BETHUNE LISA M
<CIK>0001252269
</OWNER-DATA>
<FILING-VALUES>
<FORM-TYPE>4
<ACT>34
<FILE-NUMBER>001-05654
<FILM-NUMBER>03808862
</FILING-VALUES>
<BUSINESS-ADDRESS>
<STREET1>301 NEWBURY ST.
<STREET2>#252
<CITY>DANVERS
<STATE>MA
<ZIP>01923
<PHONE>9787775540
</BUSINESS-ADDRESS>
<MAIL-ADDRESS>
<STREET1>301 NEWBURY ST
<STREET2>#252
<CITY>DANVERS
<STATE>MA
<ZIP>01923
</MAIL-ADDRESS>
</REPORTING-OWNER>
<DOCUMENT>
<TYPE>4
<SEQUENCE>1
<FILENAME>primary_doc.xml
<DESCRIPTION>PRIMARY DOCUMENT
<TEXT>
<XML>
<?xml version="1.0"?>

<ownershipDocument>

    <schemaVersion>X0201</schemaVersion>

    <documentType>4</documentType>

    <periodOfReport>2003-07-29</periodOfReport>


    <notSubjectToSection16>0</notSubjectToSection16>

    <issuer>
        <issuerCik>0000089261</issuerCik>
        <issuerName>EXX INC/NV/</issuerName>
        <issuerTradingSymbol>EXXa</issuerTradingSymbol>
    </issuer>

    <reportingOwner>
        <reportingOwnerId>
            <rptOwnerCik>0001252269</rptOwnerCik>
            <rptOwnerName>BETHUNE LISA M</rptOwnerName>
        </reportingOwnerId>
        <reportingOwnerAddress>
            <rptOwnerStreet1>301 NEWBURY ST</rptOwnerStreet1>
            <rptOwnerStreet2>#252</rptOwnerStreet2>
            <rptOwnerCity>DANVERS</rptOwnerCity>
            <rptOwnerState>MA</rptOwnerState>
            <rptOwnerZipCode>01923</rptOwnerZipCode>
            <rptOwnerStateDescription></rptOwnerStateDescription>
        </reportingOwnerAddress>
        <reportingOwnerRelationship>
            <isDirector>0</isDirector>
            <isOfficer>0</isOfficer>
            <isTenPercentOwner>1</isTenPercentOwner>
            <isOther>0</isOther>
        </reportingOwnerRelationship>
    </reportingOwner>

    <nonDerivativeTable>

        <nonDerivativeTransaction>
            <securityTitle>
                <value>EXX Corporation Class A Common Stock</value>
            </securityTitle>
            <transactionDate>
                <value>2003-07-29</value>
            </transactionDate>
            <transactionCoding>
                <transactionFormType>4</transactionFormType>
                <transactionCode>S</transactionCode>
                <equitySwapInvolved>0</equitySwapInvolved>
            </transactionCoding>
            <transactionTimeliness>
                <value></value>
            </transactionTimeliness>
            <transactionAmounts>
                <transactionShares>
                    <value>2500</value>
                </transactionShares>
                <transactionPricePerShare>
                    <value>2.84</value>
                </transactionPricePerShare>
                <transactionAcquiredDisposedCode>
                    <value>D</value>
                </transactionAcquiredDisposedCode>
            </transactionAmounts>
            <postTransactionAmounts>
                <sharesOwnedFollowingTransaction>
                    <value>1180827</value>
                </sharesOwnedFollowingTransaction>
            </postTransactionAmounts>
            <ownershipNature>
                <directOrIndirectOwnership>
                    <value>D</value>
                </directOrIndirectOwnership>
            </ownershipNature>
        </nonDerivativeTransaction>

    </nonDerivativeTable>



    <ownerSignature>
        <signatureName>Lisa M. Bethune</signatureName>
        <signatureDate>2003-07-29</signatureDate>
    </ownerSignature>

</ownershipDocument>

</XML>
</TEXT>
</DOCUMENT>
</SUBMISSION>
