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

    <schemaVersion>X0306</schemaVersion>

    <documentType>4</documentType>

    <periodOfReport>2021-09-27</periodOfReport>

    <notSubjectToSection16>0</notSubjectToSection16>

    <issuer>
        <issuerCik>0001527541</issuerCik>
        <issuerName>Wheeler Real Estate Investment Trust, Inc.</issuerName>
        <issuerTradingSymbol>WHLRD</issuerTradingSymbol>
    </issuer>

    <reportingOwner>
        <reportingOwnerId>
            <rptOwnerCik>0001635663</rptOwnerCik>
            <rptOwnerName>Steamboat Capital Partners, LLC</rptOwnerName>
        </reportingOwnerId>
        <reportingOwnerAddress>
            <rptOwnerStreet1>31 OLD WAGON ROAD</rptOwnerStreet1>
            <rptOwnerStreet2></rptOwnerStreet2>
            <rptOwnerCity>OLD GREENWICH</rptOwnerCity>
            <rptOwnerState>CT</rptOwnerState>
            <rptOwnerZipCode>06870</rptOwnerZipCode>
            <rptOwnerStateDescription></rptOwnerStateDescription>
        </reportingOwnerAddress>
        <reportingOwnerRelationship>
            <isDirector>0</isDirector>
            <isOfficer>0</isOfficer>
            <isTenPercentOwner>1</isTenPercentOwner>
            <isOther>0</isOther>
        </reportingOwnerRelationship>
    </reportingOwner>

    <reportingOwner>
        <reportingOwnerId>
            <rptOwnerCik>0001766850</rptOwnerCik>
            <rptOwnerName>Kiai Parsa</rptOwnerName>
        </reportingOwnerId>
        <reportingOwnerAddress>
            <rptOwnerStreet1>31 OLD WAGON ROAD</rptOwnerStreet1>
            <rptOwnerStreet2></rptOwnerStreet2>
            <rptOwnerCity>OLD GREENWICH</rptOwnerCity>
            <rptOwnerState>CT</rptOwnerState>
            <rptOwnerZipCode>06870</rptOwnerZipCode>
            <rptOwnerStateDescription></rptOwnerStateDescription>
        </reportingOwnerAddress>
        <reportingOwnerRelationship>
            <isDirector>0</isDirector>
            <isOfficer>0</isOfficer>
            <isTenPercentOwner>1</isTenPercentOwner>
            <isOther>0</isOther>
        </reportingOwnerRelationship>
    </reportingOwner>

    <derivativeTable>
        <derivativeTransaction>
            <securityTitle>
                <value>Series D Convertible Cumulative Preferred Stock</value>
            </securityTitle>
            <conversionOrExercisePrice>
                <value>16.96</value>
            </conversionOrExercisePrice>
            <transactionDate>
                <value>2021-10-04</value>
            </transactionDate>
            <transactionCoding>
                <transactionFormType>4</transactionFormType>
                <transactionCode>S</transactionCode>
                <equitySwapInvolved>0</equitySwapInvolved>
            </transactionCoding>
            <transactionTimeliness>
                <value></value>
            </transactionTimeliness>
            <transactionAmounts>
                <transactionShares>
                    <value>4950</value>
                </transactionShares>
                <transactionPricePerShare>
                    <value>16.334</value>
                    <footnoteId id="F2"/>
                    <footnoteId id="F3"/>
                </transactionPricePerShare>
                <transactionAcquiredDisposedCode>
                    <value>D</value>
                </transactionAcquiredDisposedCode>
            </transactionAmounts>
            <exerciseDate>
                <footnoteId id="F1"/>
            </exerciseDate>
            <expirationDate>
                <footnoteId id="F1"/>
            </expirationDate>
            <underlyingSecurity>
                <underlyingSecurityTitle>
                    <value>Common Stock, $0.01 par value</value>
                </underlyingSecurityTitle>
                <underlyingSecurityShares>
                    <value>7296</value>
                </underlyingSecurityShares>
            </underlyingSecurity>
            <postTransactionAmounts>
                <sharesOwnedFollowingTransaction>
                    <value>101395</value>
                    <footnoteId id="F4"/>
                </sharesOwnedFollowingTransaction>
            </postTransactionAmounts>
            <ownershipNature>
                <directOrIndirectOwnership>
                    <value>I</value>
                </directOrIndirectOwnership>
                <natureOfOwnership>
                    <value>See footnote</value>
                    <footnoteId id="F4"/>
                    <footnoteId id="F16"/>
                </natureOfOwnership>
            </ownershipNature>
        </derivativeTransaction>
        <derivativeTransaction>
            <securityTitle>
                <value>Series B Cumulative Preferred Stock</value>
            </securityTitle>
            <conversionOrExercisePrice>
                <value>40</value>
            </conversionOrExercisePrice>
            <transactionDate>
                <value>2021-09-27</value>
            </transactionDate>
            <transactionCoding>
                <transactionFormType>4</transactionFormType>
                <transactionCode>S</transactionCode>
                <equitySwapInvolved>0</equitySwapInvolved>
            </transactionCoding>
            <transactionTimeliness>
                <value></value>
            </transactionTimeliness>
            <transactionAmounts>
                <transactionShares>
                    <value>126</value>
                </transactionShares>
                <transactionPricePerShare>
                    <value>10.7285</value>
                    <footnoteId id="F6"/>
                </transactionPricePerShare>
                <transactionAcquiredDisposedCode>
                    <value>D</value>
                </transactionAcquiredDisposedCode>
            </transactionAmounts>
            <exerciseDate>
                <footnoteId id="F5"/>
            </exerciseDate>
            <expirationDate>
                <footnoteId id="F5"/>
            </expirationDate>
            <underlyingSecurity>
                <underlyingSecurityTitle>
                    <value>Common Stock, $0.01 par value</value>
                </underlyingSecurityTitle>
                <underlyingSecurityShares>
                    <value>78</value>
                </underlyingSecurityShares>
            </underlyingSecurity>
            <postTransactionAmounts>
                <sharesOwnedFollowingTransaction>
                    <value>42025</value>
                    <footnoteId id="F7"/>
                </sharesOwnedFollowingTransaction>
            </postTransactionAmounts>
            <ownershipNature>
                <directOrIndirectOwnership>
                    <value>I</value>
                </directOrIndirectOwnership>
                <natureOfOwnership>
                    <value>See footnote</value>
                    <footnoteId id="F7"/>
                    <footnoteId id="F16"/>
                </natureOfOwnership>
            </ownershipNature>
        </derivativeTransaction>
        <derivativeTransaction>
            <securityTitle>
                <value>Series B Cumulative Preferred Stock</value>
            </securityTitle>
            <conversionOrExercisePrice>
                <value>40</value>
            </conversionOrExercisePrice>
            <transactionDate>
                <value>2021-09-27</value>
            </transactionDate>
            <transactionCoding>
                <transactionFormType>4</transactionFormType>
                <transactionCode>S</transactionCode>
                <equitySwapInvolved>0</equitySwapInvolved>
            </transactionCoding>
            <transactionTimeliness>
                <value></value>
            </transactionTimeliness>
            <transactionAmounts>
                <transactionShares>
                    <value>399</value>
                </transactionShares>
                <transactionPricePerShare>
                    <value>10.7285</value>
                    <footnoteId id="F6"/>
                </transactionPricePerShare>
                <transactionAcquiredDisposedCode>
                    <value>D</value>
                </transactionAcquiredDisposedCode>
            </transactionAmounts>
            <exerciseDate>
                <footnoteId id="F5"/>
            </exerciseDate>
            <expirationDate>
                <footnoteId id="F5"/>
            </expirationDate>
            <underlyingSecurity>
                <underlyingSecurityTitle>
                    <value>Common Stock, $0.01 par value</value>
                </underlyingSecurityTitle>
                <underlyingSecurityShares>
                    <value>249</value>
                </underlyingSecurityShares>
            </underlyingSecurity>
            <postTransactionAmounts>
                <sharesOwnedFollowingTransaction>
                    <value>186976</value>
                    <footnoteId id="F8"/>
                </sharesOwnedFollowingTransaction>
            </postTransactionAmounts>
            <ownershipNature>
                <directOrIndirectOwnership>
                    <value>I</value>
                </directOrIndirectOwnership>
                <natureOfOwnership>
                    <value>See footnote</value>
                    <footnoteId id="F8"/>
                    <footnoteId id="F16"/>
                </natureOfOwnership>
            </ownershipNature>
        </derivativeTransaction>
        <derivativeTransaction>
            <securityTitle>
                <value>Series B Cumulative Preferred Stock</value>
            </securityTitle>
            <conversionOrExercisePrice>
                <value>40</value>
            </conversionOrExercisePrice>
            <transactionDate>
                <value>2021-09-27</value>
            </transactionDate>
            <transactionCoding>
                <transactionFormType>4</transactionFormType>
                <transactionCode>S</transactionCode>
                <equitySwapInvolved>0</equitySwapInvolved>
            </transactionCoding>
            <transactionTimeliness>
                <value></value>
            </transactionTimeliness>
            <transactionAmounts>
                <transactionShares>
                    <value>5</value>
                </transactionShares>
                <transactionPricePerShare>
                    <value>10.7285</value>
                    <footnoteId id="F6"/>
                </transactionPricePerShare>
                <transactionAcquiredDisposedCode>
                    <value>D</value>
                </transactionAcquiredDisposedCode>
            </transactionAmounts>
            <exerciseDate>
                <footnoteId id="F5"/>
            </exerciseDate>
            <expirationDate>
                <footnoteId id="F5"/>
            </expirationDate>
            <underlyingSecurity>
                <underlyingSecurityTitle>
                    <value>Common Stock, $0.01 par value</value>
                </underlyingSecurityTitle>
                <underlyingSecurityShares>
                    <value>3</value>
                </underlyingSecurityShares>
            </underlyingSecurity>
            <postTransactionAmounts>
                <sharesOwnedFollowingTransaction>
                    <value>2592</value>
                    <footnoteId id="F9"/>
                </sharesOwnedFollowingTransaction>
            </postTransactionAmounts>
            <ownershipNature>
                <directOrIndirectOwnership>
                    <value>I</value>
                </directOrIndirectOwnership>
                <natureOfOwnership>
                    <value>See footnote</value>
                    <footnoteId id="F9"/>
                    <footnoteId id="F16"/>
                </natureOfOwnership>
            </ownershipNature>
        </derivativeTransaction>
        <derivativeTransaction>
            <securityTitle>
                <value>Series B Cumulative Preferred Stock</value>
            </securityTitle>
            <conversionOrExercisePrice>
                <value>40</value>
            </conversionOrExercisePrice>
            <transactionDate>
                <value>2021-10-04</value>
            </transactionDate>
            <transactionCoding>
                <transactionFormType>4</transactionFormType>
                <transactionCode>S</transactionCode>
                <equitySwapInvolved>0</equitySwapInvolved>
            </transactionCoding>
            <transactionTimeliness>
                <value></value>
            </transactionTimeliness>
            <transactionAmounts>
                <transactionShares>
                    <value>194</value>
                </transactionShares>
                <transactionPricePerShare>
                    <value>10.3901</value>
                    <footnoteId id="F10"/>
                </transactionPricePerShare>
                <transactionAcquiredDisposedCode>
                    <value>D</value>
                </transactionAcquiredDisposedCode>
            </transactionAmounts>
            <exerciseDate>
                <footnoteId id="F5"/>
            </exerciseDate>
            <expirationDate>
                <footnoteId id="F5"/>
            </expirationDate>
            <underlyingSecurity>
                <underlyingSecurityTitle>
                    <value>Common Stock, $0.01 par value</value>
                </underlyingSecurityTitle>
                <underlyingSecurityShares>
                    <value>121</value>
                </underlyingSecurityShares>
            </underlyingSecurity>
            <postTransactionAmounts>
                <sharesOwnedFollowingTransaction>
                    <value>41831</value>
                    <footnoteId id="F11"/>
                </sharesOwnedFollowingTransaction>
            </postTransactionAmounts>
            <ownershipNature>
                <directOrIndirectOwnership>
                    <value>I</value>
                </directOrIndirectOwnership>
                <natureOfOwnership>
                    <value>See footnote</value>
                    <footnoteId id="F11"/>
                    <footnoteId id="F16"/>
                </natureOfOwnership>
            </ownershipNature>
        </derivativeTransaction>
        <derivativeTransaction>
            <securityTitle>
                <value>Series B Cumulative Preferred Stock</value>
            </securityTitle>
            <conversionOrExercisePrice>
                <value>40</value>
            </conversionOrExercisePrice>
            <transactionDate>
                <value>2021-10-04</value>
            </transactionDate>
            <transactionCoding>
                <transactionFormType>4</transactionFormType>
                <transactionCode>S</transactionCode>
                <equitySwapInvolved>0</equitySwapInvolved>
            </transactionCoding>
            <transactionTimeliness>
                <value></value>
            </transactionTimeliness>
            <transactionAmounts>
                <transactionShares>
                    <value>491</value>
                </transactionShares>
                <transactionPricePerShare>
                    <value>10.4275</value>
                    <footnoteId id="F12"/>
                </transactionPricePerShare>
                <transactionAcquiredDisposedCode>
                    <value>D</value>
                </transactionAcquiredDisposedCode>
            </transactionAmounts>
            <exerciseDate>
                <footnoteId id="F5"/>
            </exerciseDate>
            <expirationDate>
                <footnoteId id="F5"/>
            </expirationDate>
            <underlyingSecurity>
                <underlyingSecurityTitle>
                    <value>Common Stock, $0.01 par value</value>
                </underlyingSecurityTitle>
                <underlyingSecurityShares>
                    <value>306</value>
                </underlyingSecurityShares>
            </underlyingSecurity>
            <postTransactionAmounts>
                <sharesOwnedFollowingTransaction>
                    <value>41340</value>
                    <footnoteId id="F13"/>
                </sharesOwnedFollowingTransaction>
            </postTransactionAmounts>
            <ownershipNature>
                <directOrIndirectOwnership>
                    <value>I</value>
                </directOrIndirectOwnership>
                <natureOfOwnership>
                    <value>See footnote</value>
                    <footnoteId id="F13"/>
                    <footnoteId id="F16"/>
                </natureOfOwnership>
            </ownershipNature>
        </derivativeTransaction>
        <derivativeTransaction>
            <securityTitle>
                <value>Series B Cumulative Preferred Stock</value>
            </securityTitle>
            <conversionOrExercisePrice>
                <value>40</value>
            </conversionOrExercisePrice>
            <transactionDate>
                <value>2021-10-04</value>
            </transactionDate>
            <transactionCoding>
                <transactionFormType>4</transactionFormType>
                <transactionCode>S</transactionCode>
                <equitySwapInvolved>0</equitySwapInvolved>
            </transactionCoding>
            <transactionTimeliness>
                <value></value>
            </transactionTimeliness>
            <transactionAmounts>
                <transactionShares>
                    <value>1594</value>
                </transactionShares>
                <transactionPricePerShare>
                    <value>10.4275</value>
                    <footnoteId id="F12"/>
                </transactionPricePerShare>
                <transactionAcquiredDisposedCode>
                    <value>D</value>
                </transactionAcquiredDisposedCode>
            </transactionAmounts>
            <exerciseDate>
                <footnoteId id="F5"/>
            </exerciseDate>
            <expirationDate>
                <footnoteId id="F5"/>
            </expirationDate>
            <underlyingSecurity>
                <underlyingSecurityTitle>
                    <value>Common Stock, $0.01 par value</value>
                </underlyingSecurityTitle>
                <underlyingSecurityShares>
                    <value>996</value>
                </underlyingSecurityShares>
            </underlyingSecurity>
            <postTransactionAmounts>
                <sharesOwnedFollowingTransaction>
                    <value>185382</value>
                    <footnoteId id="F14"/>
                </sharesOwnedFollowingTransaction>
            </postTransactionAmounts>
            <ownershipNature>
                <directOrIndirectOwnership>
                    <value>I</value>
                </directOrIndirectOwnership>
                <natureOfOwnership>
                    <value>See footnote</value>
                    <footnoteId id="F14"/>
                    <footnoteId id="F16"/>
                </natureOfOwnership>
            </ownershipNature>
        </derivativeTransaction>
        <derivativeTransaction>
            <securityTitle>
                <value>Series B Cumulative Preferred Stock</value>
            </securityTitle>
            <conversionOrExercisePrice>
                <value>40</value>
            </conversionOrExercisePrice>
            <transactionDate>
                <value>2021-10-04</value>
            </transactionDate>
            <transactionCoding>
                <transactionFormType>4</transactionFormType>
                <transactionCode>S</transactionCode>
                <equitySwapInvolved>0</equitySwapInvolved>
            </transactionCoding>
            <transactionTimeliness>
                <value></value>
            </transactionTimeliness>
            <transactionAmounts>
                <transactionShares>
                    <value>22</value>
                </transactionShares>
                <transactionPricePerShare>
                    <value>10.4275</value>
                    <footnoteId id="F12"/>
                </transactionPricePerShare>
                <transactionAcquiredDisposedCode>
                    <value>D</value>
                </transactionAcquiredDisposedCode>
            </transactionAmounts>
            <exerciseDate>
                <footnoteId id="F5"/>
            </exerciseDate>
            <expirationDate>
                <footnoteId id="F5"/>
            </expirationDate>
            <underlyingSecurity>
                <underlyingSecurityTitle>
                    <value>Common Stock, $0.01 par value</value>
                </underlyingSecurityTitle>
                <underlyingSecurityShares>
                    <value>13</value>
                </underlyingSecurityShares>
            </underlyingSecurity>
            <postTransactionAmounts>
                <sharesOwnedFollowingTransaction>
                    <value>2570</value>
                    <footnoteId id="F15"/>
                </sharesOwnedFollowingTransaction>
            </postTransactionAmounts>
            <ownershipNature>
                <directOrIndirectOwnership>
                    <value>I</value>
                </directOrIndirectOwnership>
                <natureOfOwnership>
                    <value>See footnote</value>
                    <footnoteId id="F15"/>
                    <footnoteId id="F16"/>
                </natureOfOwnership>
            </ownershipNature>
        </derivativeTransaction>
    </derivativeTable>

    <footnotes>
        <footnote id="F1">Convertible at any time, without expiration date.</footnote>
        <footnote id="F2">This is an average price. The price at which the shares were actually sold ranges from $16.00 to $16.60.</footnote>
        <footnote id="F3">The reporting persons hereby undertake to provide upon request to the SEC staff, the issuer or a security holder of the issuer full information regarding the number of shares sold at each separate price.</footnote>
        <footnote id="F4">The transaction was effected for certain accounts managed by Steamboat Capital Partners, LLC (&quot;IA&quot;) which accounts, after such transaction, own 101,395 shares of Series D Convertible Cumulative Preferred Stock (&quot;Series D&quot;).  The ownership of Steamboat Capital Partners Master Fund, LP (&quot;Master&quot;), which has delegated investment discretion to IA and owns 328,828 shares of Series D, and Steamboat Capital Partners II, LP (&quot;II&quot;), which owns 4319 shares of Series D, remain unchanged.</footnote>
        <footnote id="F5">Convertible at any time without expiration, but subject to mandatory conversion if the 20 trading day volume-weighted average closing price of the Common Stock, $0.01 par value, exceeds $58.</footnote>
        <footnote id="F6">This is an average price. The prices at which the shares were actually sold range from $10.70 to $10.75.</footnote>
        <footnote id="F7">The transaction was effected for certain accounts managed by Steamboat Capital Partners, LLC (&quot;IA&quot;), which accounts, after such transaction, own 42,025 shares of Series B Cumulative Preferred Stock.</footnote>
        <footnote id="F8">The transaction was effected for Steamboat Capital Partners Master Fund, LP (&quot;Master&quot;) which has delegated investment discretion to Steamboat Capital Partners, LLC (&quot;IA&quot;).  After such transaction, Master owns 186,976 shares of Series B Cumulative Preferred Stock.</footnote>
        <footnote id="F9">The transaction was effected for Steamboat Capital Partners II, LP (&quot;II&quot;) which, after such transaction, owns 2592 shares of Series B Cumulative Preferred Stock.</footnote>
        <footnote id="F10">This is an average price. The prices at which shares were actually sold range from $10.39 to $10.41.</footnote>
        <footnote id="F11">The transaction was effected for certain accounts managed by Steamboat Capital Partners, LLC (&quot;IA&quot;), which accounts, after such transaction, own 41,831 shares of Series B Cumulative Preferred Stock.</footnote>
        <footnote id="F12">This is an average price. The prices at which shares were actually sold range from $10.39 to $10.8475.</footnote>
        <footnote id="F13">The transaction was effected for certain accounts managed by Steamboat Capital Partners, LLC (&quot;IA&quot;) which accounts, after such transaction, own 41,340 shares of Series B Cumulative Preferred Stock.</footnote>
        <footnote id="F14">The transaction was effected for Steamboat Capital Partners Master Fund, LP (&quot;Master&quot;) which has delegated investment discretion to Steamboat Capital Partners, LLC (&quot;IA&quot;). After such transaction, Master owns 185, 382 shares of Series B Cumulative Preferred Stock.</footnote>
        <footnote id="F15">The transaction was effected for Steamboat Capital Partners II, LP (&quot;II&quot;) which, after such transaction, owns 2570 shares of Series B Cumulative Preferred Stock.</footnote>
        <footnote id="F16">Steamboat Capital Partners GP, LLC (&quot;GP&quot;) is the general partner of, and is entitled to receive a performance allocation from, each of Master and II. IA is entitled to receive a performance fee from the certain accounts managed by IA and referred to in footnotes 4,7,11 and 13 (the &quot;MA&quot;). Parsa Kiai (&quot;Kiai&quot;) is the Managing Member of GP and IA.  Accordingly, Kiai may be deemed to have a pecuniary interest in the shares owned by Master and II and IA and Kiai may be deemed to have a pecuniary interest in the shares owned by the MA. Kiai and IA are filers of this report, filing jointly but not as a group and each disclaims beneficial ownership of securities reported hereon except to the extent of his or its pecuniary interest therein.</footnote>
    </footnotes>

    <remarks>The series of preferred stock of Wheeler Real Estate Investment Trust, Inc. reported hereon trades under two different tickers: WHLRD and WHLRP.</remarks>

    <ownerSignature>
        <signatureName>Steamboat Capital Partners, LLC</signatureName>
        <signatureDate>2021-10-06</signatureDate>
    </ownerSignature>

    <ownerSignature>
        <signatureName>Parsa Kiai</signatureName>
        <signatureDate>2021-10-06</signatureDate>
    </ownerSignature>
</ownershipDocument>
