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

    <schemaVersion>X0306</schemaVersion>

    <documentType>4</documentType>

    <periodOfReport>2019-03-06</periodOfReport>

    <notSubjectToSection16>0</notSubjectToSection16>

    <issuer>
        <issuerCik>0000030697</issuerCik>
        <issuerName>Wendy's Co</issuerName>
        <issuerTradingSymbol>WEN</issuerTradingSymbol>
    </issuer>

    <reportingOwner>
        <reportingOwnerId>
            <rptOwnerCik>0001345471</rptOwnerCik>
            <rptOwnerName>TRIAN FUND MANAGEMENT, L.P.</rptOwnerName>
        </reportingOwnerId>
        <reportingOwnerAddress>
            <rptOwnerStreet1>280 PARK AVENUE</rptOwnerStreet1>
            <rptOwnerStreet2>41ST FLOOR</rptOwnerStreet2>
            <rptOwnerCity>NEW YORK</rptOwnerCity>
            <rptOwnerState>NY</rptOwnerState>
            <rptOwnerZipCode>10017</rptOwnerZipCode>
            <rptOwnerStateDescription></rptOwnerStateDescription>
        </reportingOwnerAddress>
        <reportingOwnerRelationship>
            <isDirector>0</isDirector>
            <isOfficer>0</isOfficer>
            <isTenPercentOwner>1</isTenPercentOwner>
            <isOther>0</isOther>
        </reportingOwnerRelationship>
    </reportingOwner>

    <reportingOwner>
        <reportingOwnerId>
            <rptOwnerCik>0001345466</rptOwnerCik>
            <rptOwnerName>Trian Partners Master Fund, L.P.</rptOwnerName>
        </reportingOwnerId>
        <reportingOwnerAddress>
            <rptOwnerStreet1>280 PARK AVENUE</rptOwnerStreet1>
            <rptOwnerStreet2>41ST FLOOR</rptOwnerStreet2>
            <rptOwnerCity>NEW YORK</rptOwnerCity>
            <rptOwnerState>NY</rptOwnerState>
            <rptOwnerZipCode>10017</rptOwnerZipCode>
            <rptOwnerStateDescription></rptOwnerStateDescription>
        </reportingOwnerAddress>
        <reportingOwnerRelationship>
            <isDirector>0</isDirector>
            <isOfficer>0</isOfficer>
            <isTenPercentOwner>1</isTenPercentOwner>
            <isOther>0</isOther>
        </reportingOwnerRelationship>
    </reportingOwner>

    <reportingOwner>
        <reportingOwnerId>
            <rptOwnerCik>0001345007</rptOwnerCik>
            <rptOwnerName>Trian Partners Parallel Fund I, L.P.</rptOwnerName>
        </reportingOwnerId>
        <reportingOwnerAddress>
            <rptOwnerStreet1>280 PARK AVENUE</rptOwnerStreet1>
            <rptOwnerStreet2>41ST FLOOR</rptOwnerStreet2>
            <rptOwnerCity>NEW YORK</rptOwnerCity>
            <rptOwnerState>NY</rptOwnerState>
            <rptOwnerZipCode>10017</rptOwnerZipCode>
            <rptOwnerStateDescription></rptOwnerStateDescription>
        </reportingOwnerAddress>
        <reportingOwnerRelationship>
            <isDirector>0</isDirector>
            <isOfficer>0</isOfficer>
            <isTenPercentOwner>1</isTenPercentOwner>
            <isOther>0</isOther>
        </reportingOwnerRelationship>
    </reportingOwner>

    <reportingOwner>
        <reportingOwnerId>
            <rptOwnerCik>0001345465</rptOwnerCik>
            <rptOwnerName>Trian Partners, L.P.</rptOwnerName>
        </reportingOwnerId>
        <reportingOwnerAddress>
            <rptOwnerStreet1>280 PARK AVENUE</rptOwnerStreet1>
            <rptOwnerStreet2>41ST FLOOR</rptOwnerStreet2>
            <rptOwnerCity>NEW YORK</rptOwnerCity>
            <rptOwnerState>NY</rptOwnerState>
            <rptOwnerZipCode>10017</rptOwnerZipCode>
            <rptOwnerStateDescription></rptOwnerStateDescription>
        </reportingOwnerAddress>
        <reportingOwnerRelationship>
            <isDirector>0</isDirector>
            <isOfficer>0</isOfficer>
            <isTenPercentOwner>1</isTenPercentOwner>
            <isOther>0</isOther>
        </reportingOwnerRelationship>
    </reportingOwner>

    <reportingOwner>
        <reportingOwnerId>
            <rptOwnerCik>0001691893</rptOwnerCik>
            <rptOwnerName>Trian Partners Strategic Fund-G II, L.P.</rptOwnerName>
        </reportingOwnerId>
        <reportingOwnerAddress>
            <rptOwnerStreet1>280 PARK AVENUE</rptOwnerStreet1>
            <rptOwnerStreet2>41ST FLOOR</rptOwnerStreet2>
            <rptOwnerCity>NEW YORK</rptOwnerCity>
            <rptOwnerState>NY</rptOwnerState>
            <rptOwnerZipCode>10017</rptOwnerZipCode>
            <rptOwnerStateDescription></rptOwnerStateDescription>
        </reportingOwnerAddress>
        <reportingOwnerRelationship>
            <isDirector>0</isDirector>
            <isOfficer>0</isOfficer>
            <isTenPercentOwner>1</isTenPercentOwner>
            <isOther>0</isOther>
        </reportingOwnerRelationship>
    </reportingOwner>

    <reportingOwner>
        <reportingOwnerId>
            <rptOwnerCik>0001691861</rptOwnerCik>
            <rptOwnerName>Trian Partners Strategic Fund-G III, L.P.</rptOwnerName>
        </reportingOwnerId>
        <reportingOwnerAddress>
            <rptOwnerStreet1>280 PARK AVENUE</rptOwnerStreet1>
            <rptOwnerStreet2>41ST FLOOR</rptOwnerStreet2>
            <rptOwnerCity>NEW YORK</rptOwnerCity>
            <rptOwnerState>NY</rptOwnerState>
            <rptOwnerZipCode>10017</rptOwnerZipCode>
            <rptOwnerStateDescription></rptOwnerStateDescription>
        </reportingOwnerAddress>
        <reportingOwnerRelationship>
            <isDirector>0</isDirector>
            <isOfficer>0</isOfficer>
            <isTenPercentOwner>1</isTenPercentOwner>
            <isOther>0</isOther>
        </reportingOwnerRelationship>
    </reportingOwner>

    <reportingOwner>
        <reportingOwnerId>
            <rptOwnerCik>0001691898</rptOwnerCik>
            <rptOwnerName>Trian Partners Strategic Fund-K, L.P.</rptOwnerName>
        </reportingOwnerId>
        <reportingOwnerAddress>
            <rptOwnerStreet1>280 PARK AVENUE</rptOwnerStreet1>
            <rptOwnerStreet2>41ST FLOOR</rptOwnerStreet2>
            <rptOwnerCity>NEW YORK</rptOwnerCity>
            <rptOwnerState>NY</rptOwnerState>
            <rptOwnerZipCode>10017</rptOwnerZipCode>
            <rptOwnerStateDescription></rptOwnerStateDescription>
        </reportingOwnerAddress>
        <reportingOwnerRelationship>
            <isDirector>0</isDirector>
            <isOfficer>0</isOfficer>
            <isTenPercentOwner>1</isTenPercentOwner>
            <isOther>0</isOther>
        </reportingOwnerRelationship>
    </reportingOwner>

    <reportingOwner>
        <reportingOwnerId>
            <rptOwnerCik>0001691900</rptOwnerCik>
            <rptOwnerName>Trian Partners Strategic Fund-C, Ltd.</rptOwnerName>
        </reportingOwnerId>
        <reportingOwnerAddress>
            <rptOwnerStreet1>280 PARK AVENUE</rptOwnerStreet1>
            <rptOwnerStreet2>41ST FLOOR</rptOwnerStreet2>
            <rptOwnerCity>NEW YORK</rptOwnerCity>
            <rptOwnerState>NY</rptOwnerState>
            <rptOwnerZipCode>10017</rptOwnerZipCode>
            <rptOwnerStateDescription></rptOwnerStateDescription>
        </reportingOwnerAddress>
        <reportingOwnerRelationship>
            <isDirector>0</isDirector>
            <isOfficer>0</isOfficer>
            <isTenPercentOwner>1</isTenPercentOwner>
            <isOther>0</isOther>
        </reportingOwnerRelationship>
    </reportingOwner>

    <nonDerivativeTable>
        <nonDerivativeTransaction>
            <securityTitle>
                <value>Common Stock</value>
            </securityTitle>
            <transactionDate>
                <value>2019-03-06</value>
            </transactionDate>
            <deemedExecutionDate></deemedExecutionDate>
            <transactionCoding>
                <transactionFormType>4</transactionFormType>
                <transactionCode>S</transactionCode>
                <equitySwapInvolved>0</equitySwapInvolved>
            </transactionCoding>
            <transactionTimeliness>
                <value></value>
            </transactionTimeliness>
            <transactionAmounts>
                <transactionShares>
                    <value>3000000</value>
                </transactionShares>
                <transactionPricePerShare>
                    <value>17.11</value>
                </transactionPricePerShare>
                <transactionAcquiredDisposedCode>
                    <value>D</value>
                </transactionAcquiredDisposedCode>
            </transactionAmounts>
            <postTransactionAmounts>
                <sharesOwnedFollowingTransaction>
                    <value>28630629</value>
                </sharesOwnedFollowingTransaction>
            </postTransactionAmounts>
            <ownershipNature>
                <directOrIndirectOwnership>
                    <value>I</value>
                </directOrIndirectOwnership>
                <natureOfOwnership>
                    <value>Please see explanation below</value>
                    <footnoteId id="F1"/>
                    <footnoteId id="F2"/>
                    <footnoteId id="F3"/>
                </natureOfOwnership>
            </ownershipNature>
        </nonDerivativeTransaction>
    </nonDerivativeTable>

    <footnotes>
        <footnote id="F1">Trian Fund Management GP, LLC (&quot;Trian Management GP&quot;) is the general partner (the &quot;GP&quot;) of Trian Fund Management, L.P. (&quot;Trian Management&quot;), which serves as the management company for Trian Partners, L.P. (&quot;Trian Onshore&quot;), Trian Partners Master Fund, L.P. (&quot;Trian Offshore&quot;), Trian Partners Parallel Fund I, L.P. (&quot;Parallel Fund I&quot;), Trian Partners Strategic Fund-G II, L.P. (&quot;Fund-G II&quot;),Trian Partners Strategic Fund-G III, L.P. (&quot;Fund-G III&quot;), Trian Partners Strategic Fund-K, L.P. (&quot;Fund-K&quot;) and Trian Partners Strategic Fund-C, Ltd. (&quot;Fund-C&quot; and collectively, the &quot;Trian Funds&quot;).</footnote>
        <footnote id="F2">(FN 2, contd.) Trian Partners General Partner, LLC is the GP of Trian Partners GP, L.P. (&quot;Trian GP&quot;), which is the GP of Trian Onshore and Trian Offshore. Trian Partners Parallel Fund I General Partner, LLC is the GP of Parallel Fund I, Trian Partners Strategic Fund-G II General Partner, LLC is the GP of Trian Partners Strategic Fund-G II GP, L.P., which is the GP of Fund-G II, Trian Partners Strategic Fund-G III General Partner, LLC is the GP of Trian Partners Strategic Fund-G III GP, L.P., which is the GP of Fund-G III, Trian Partners Strategic Fund-K General Partner, LLC is the GP of Trian Partners Strategic Fund-K, GP, L.P., which is the GP of Fund-K and Trian Partners Strategic Fund C General Partner, LLC is the GP of Trian Partners Strategic Fund-C GP, L.P., which is the GP of the feeder fund to Fund-C.</footnote>
        <footnote id="F3">Each reporting person states that neither the filing of this statement nor anything herein shall be deemed an admission that such person is, for purposes of Section 16 of the Securities Exchange Act of 1934, as amended, or otherwise, the beneficial owner of any securities covered by this statement. Each reporting person disclaims beneficial ownership of the securities covered by this statement, except to the extent of the pecuniary interest of such person in such securities.</footnote>
    </footnotes>

    <remarks>Each of Trian Management GP, Trian Partners General Partner, LLC, Trian Partners Parallel Fund I General Partner, LLC, Trian Partners Strategic Fund-G II General Partner, LLC, Trian Partners Strategic Fund-G III General Partner, LLC, Trian Partners Strategic Fund-K General Partner, LLC, Trian Partners Strategic Fund-C General Partner, LLC (collectively, the &quot;GP LLC Entities&quot;) and Trian GP, Trian Partners Strategic Fund-G II GP, L.P., Trian Partners Strategic Fund-G III GP, L.P., Trian Partners Strategic Fund-K GP, L.P., Trian Partners Strategic Fund-C GP, L.P. (collectively, the &quot;GP Entities&quot;) is also a reporting person. Since the SEC's filing system will not accept CIK and CCC codes from more than ten joint filers of a report, the GP LLC Entities and the GP Entities have filed separate Form 4s that relate to the same securities and transactions reported herein. Thus, in total, there are 22 joint filers: the GP LLC Entities, the GP Entities, Trian Fund Management, L.P. and each of the other persons that is a signatory to this Form 4. Nelson Peltz, Peter W. May and Edward P. Garden are in a position to determine the investment and voting decisions made on behalf of each of the 22 joint filers. Matthew Peltz (&quot;M. Peltz&quot;) is a limited partner in the GP Entities and a member of the GP LLC Entities and as such has an indirect interest in the shares of the Issuer beneficially owned by the Trian Funds, the GP Entities and the GP LLC Entities.  Messrs. Peltz, May, Garden and M. Peltz currently report their holdings and transactions in the Issuer's securities in separate filings. The holdings of securities of the Issuer and the transactions reported in this filing and in the filings by the other joint filers are also reported in the filings made by each of Messrs. Peltz, May, Garden and M. Peltz and in each case relate to the same securities (reported as indirectly held by them) and transactions.</remarks>

    <ownerSignature>
        <signatureName>Trian Fund Management, L.P., By: Trian Fund Management GP, LLC, General Partner, By: Edward P. Garden, Member</signatureName>
        <signatureDate>2019-03-07</signatureDate>
    </ownerSignature>

    <ownerSignature>
        <signatureName>Edward P. Garden, member of the general partner of the general partner of Trian Partners Master Fund, L.P.</signatureName>
        <signatureDate>2019-03-07</signatureDate>
    </ownerSignature>

    <ownerSignature>
        <signatureName>Edward P. Garden, member of the general partner of Trian Partners Parallel Fund I, L.P.</signatureName>
        <signatureDate>2019-03-07</signatureDate>
    </ownerSignature>

    <ownerSignature>
        <signatureName>Edward P. Garden, member of the general partner of the general partner of Trian Partners, L.P.</signatureName>
        <signatureDate>2019-03-07</signatureDate>
    </ownerSignature>

    <ownerSignature>
        <signatureName>Edward P. Garden, member of the general partner of the general partner of Trian Partners Strategic Fund-G II, L.P.</signatureName>
        <signatureDate>2019-03-07</signatureDate>
    </ownerSignature>

    <ownerSignature>
        <signatureName>Edward P. Garden, member of the general partner of the general partner of Trian Partners Strategic Fund-G III, L.P.</signatureName>
        <signatureDate>2019-03-07</signatureDate>
    </ownerSignature>

    <ownerSignature>
        <signatureName>Edward P. Garden, member of the general partner of the general partner of Trian Partners Strategic Fund-K, L.P.</signatureName>
        <signatureDate>2019-03-07</signatureDate>
    </ownerSignature>

    <ownerSignature>
        <signatureName>Edward P. Garden, Director of Trian Partners Strategic Fund-C, Ltd.</signatureName>
        <signatureDate>2019-03-07</signatureDate>
    </ownerSignature>
</ownershipDocument>
