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

    <schemaVersion>X0306</schemaVersion>

    <documentType>4</documentType>

    <periodOfReport>2016-06-06</periodOfReport>

    <notSubjectToSection16>0</notSubjectToSection16>

    <issuer>
        <issuerCik>0001285701</issuerCik>
        <issuerName>MMRGlobal, Inc.</issuerName>
        <issuerTradingSymbol>MMRF</issuerTradingSymbol>
    </issuer>

    <reportingOwner>
        <reportingOwnerId>
            <rptOwnerCik>0001452283</rptOwnerCik>
            <rptOwnerName>RHL Group, Inc.</rptOwnerName>
        </reportingOwnerId>
        <reportingOwnerAddress>
            <rptOwnerStreet1>P.O. BOX 17034</rptOwnerStreet1>
            <rptOwnerStreet2></rptOwnerStreet2>
            <rptOwnerCity>BEVERLY HILLS</rptOwnerCity>
            <rptOwnerState>CA</rptOwnerState>
            <rptOwnerZipCode>90210</rptOwnerZipCode>
            <rptOwnerStateDescription></rptOwnerStateDescription>
        </reportingOwnerAddress>
        <reportingOwnerRelationship>
            <isDirector>0</isDirector>
            <isOfficer>0</isOfficer>
            <isTenPercentOwner>1</isTenPercentOwner>
            <isOther>0</isOther>
        </reportingOwnerRelationship>
    </reportingOwner>

    <derivativeTable>
        <derivativeTransaction>
            <securityTitle>
                <value>Warrant to purchase Common Stock</value>
            </securityTitle>
            <conversionOrExercisePrice>
                <value>0.011</value>
            </conversionOrExercisePrice>
            <transactionDate>
                <value>2016-06-06</value>
            </transactionDate>
            <transactionCoding>
                <transactionFormType>4</transactionFormType>
                <transactionCode>P</transactionCode>
                <equitySwapInvolved>0</equitySwapInvolved>
            </transactionCoding>
            <transactionTimeliness>
                <value></value>
            </transactionTimeliness>
            <transactionAmounts>
                <transactionShares>
                    <value>2777714</value>
                </transactionShares>
                <transactionPricePerShare>
                    <value>0.011</value>
                </transactionPricePerShare>
                <transactionAcquiredDisposedCode>
                    <value>A</value>
                </transactionAcquiredDisposedCode>
            </transactionAmounts>
            <exerciseDate>
                <value>2016-06-06</value>
            </exerciseDate>
            <expirationDate>
                <value>2016-06-06</value>
            </expirationDate>
            <underlyingSecurity>
                <underlyingSecurityTitle>
                    <value>Commson Stock</value>
                </underlyingSecurityTitle>
                <underlyingSecurityShares>
                    <value>2777714</value>
                </underlyingSecurityShares>
            </underlyingSecurity>
            <postTransactionAmounts>
                <sharesOwnedFollowingTransaction>
                    <value>37705029</value>
                </sharesOwnedFollowingTransaction>
            </postTransactionAmounts>
            <ownershipNature>
                <directOrIndirectOwnership>
                    <value>I</value>
                    <footnoteId id="F1"/>
                </directOrIndirectOwnership>
                <natureOfOwnership>
                    <value>See Note 1</value>
                </natureOfOwnership>
            </ownershipNature>
        </derivativeTransaction>
        <derivativeTransaction>
            <securityTitle>
                <value>Promissory Note with Conversion Feature</value>
            </securityTitle>
            <conversionOrExercisePrice>
                <value>0.012</value>
            </conversionOrExercisePrice>
            <transactionDate>
                <value>2016-06-06</value>
            </transactionDate>
            <transactionCoding>
                <transactionFormType>4</transactionFormType>
                <transactionCode>P</transactionCode>
                <equitySwapInvolved>0</equitySwapInvolved>
            </transactionCoding>
            <transactionTimeliness>
                <value></value>
            </transactionTimeliness>
            <transactionAmounts>
                <transactionShares>
                    <value>41666667</value>
                </transactionShares>
                <transactionPricePerShare>
                    <value>0.012</value>
                </transactionPricePerShare>
                <transactionAcquiredDisposedCode>
                    <value>A</value>
                </transactionAcquiredDisposedCode>
            </transactionAmounts>
            <exerciseDate>
                <value>2016-06-06</value>
            </exerciseDate>
            <expirationDate>
                <value>2019-05-12</value>
            </expirationDate>
            <underlyingSecurity>
                <underlyingSecurityTitle>
                    <value>Common Stock</value>
                </underlyingSecurityTitle>
                <underlyingSecurityShares>
                    <value>41666667</value>
                </underlyingSecurityShares>
            </underlyingSecurity>
            <postTransactionAmounts>
                <sharesOwnedFollowingTransaction>
                    <value>79371696</value>
                </sharesOwnedFollowingTransaction>
            </postTransactionAmounts>
            <ownershipNature>
                <directOrIndirectOwnership>
                    <value>I</value>
                    <footnoteId id="F2"/>
                </directOrIndirectOwnership>
                <natureOfOwnership>
                    <value>See Note 2</value>
                </natureOfOwnership>
            </ownershipNature>
        </derivativeTransaction>
    </derivativeTable>

    <footnotes>
        <footnote id="F1">This warrant was issued pursuant to the terms of the Eleventh Amended and Restated Secured Promissory Note dated June 6, 2016 representing one warrant for every dollar outstanding in the total unpaid balance of the note. Mr. Lorsch is the chief executive officer of the RHL group and has a 100% ownership interest in the RHL group. Therefore Mr. Lorsch may be deemed to be the beneficial owner of the issuers common stock beneficially held by The RHL group. Mr. Lorsch has full voting and dispositive power over such shares of issuer's common stock held directly by the RHL Group.</footnote>
        <footnote id="F2">Conversion rights granted to The RHL Group as part of the Eleventh Amended and Restated Secured Promissory Note (the &quot;Note&quot;) which superseded a $500,000 Conversion right contained in the Seventh, Eighth, Ninth and Tenth Note. The Eleventh Note supersedes the Tenth Note and provides The RHL Group with the right to convert up to $500,000 of the outstanding and unpaid principal and accrued interest, if any, at the time of conversion. This right is valid is valid until the promissory note and any future amendments are superseded or paid in full. Mr. Lorsch is the Chief Executive Officer of the RHL group and has a 100% ownership interest in the RHL group. Therefore Mr. Lorsch may be deemed to be the beneficial owner of the issuers common stock beneficially held by The RHL group. Mr. Lorsch has full voting and dispositive power over such shares of issuer's common stock held directly by the RHL Group.</footnote>
    </footnotes>

    <ownerSignature>
        <signatureName>/s/ Robert H. Lorsch, CEO, The RHL Group, Inc.</signatureName>
        <signatureDate>2016-06-10</signatureDate>
    </ownerSignature>
</ownershipDocument>
