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

    <schemaVersion>X0304</schemaVersion>

    <documentType>4</documentType>

    <periodOfReport>2012-02-07</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>0001345469</rptOwnerCik>
            <rptOwnerName>Trian Partners Parallel Fund I General Partner, LLC</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>0001345464</rptOwnerCik>
            <rptOwnerName>Trian Partners General Partner, LLC</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>0001345472</rptOwnerCik>
            <rptOwnerName>Trian Fund Management GP, LLC</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>0001498042</rptOwnerCik>
            <rptOwnerName>Trian Partners Strategic Investment Fund General Partner, LLC</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>2012-02-07</value>
            </transactionDate>
            <deemedExecutionDate></deemedExecutionDate>
            <transactionCoding>
                <transactionFormType>4</transactionFormType>
                <transactionCode>P</transactionCode>
                <equitySwapInvolved>0</equitySwapInvolved>
            </transactionCoding>
            <transactionTimeliness>
                <value></value>
            </transactionTimeliness>
            <transactionAmounts>
                <transactionShares>
                    <value>1250000</value>
                    <footnoteId id="F1"/>
                </transactionShares>
                <transactionPricePerShare>
                    <value>4.9915</value>
                    <footnoteId id="F1"/>
                </transactionPricePerShare>
                <transactionAcquiredDisposedCode>
                    <value>A</value>
                </transactionAcquiredDisposedCode>
            </transactionAmounts>
            <postTransactionAmounts>
                <sharesOwnedFollowingTransaction>
                    <value>81748145</value>
                </sharesOwnedFollowingTransaction>
            </postTransactionAmounts>
            <ownershipNature>
                <directOrIndirectOwnership>
                    <value>I</value>
                </directOrIndirectOwnership>
                <natureOfOwnership>
                    <value>Please see explanation below</value>
                    <footnoteId id="F2"/>
                    <footnoteId id="F3"/>
                    <footnoteId id="F4"/>
                </natureOfOwnership>
            </ownershipNature>
        </nonDerivativeTransaction>
    </nonDerivativeTable>

    <footnotes>
        <footnote id="F1">The price shown in Column 4 is a weighted average purchase price. The price range for the purchases is $4.94 to $5.03. The reporting person undertakes to provide upon request by the staff of the Securities and Exchange Commission, the Issuer or a security holder of the Issuer, full information regarding the number of shares purchased at each separate price.</footnote>
        <footnote id="F2">Trian Fund Management GP, LLC (&quot;Trian Management GP&quot;) is the general partner 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;) and Trian Partners Strategic Investment Fund, L.P. (&quot;Strategic Fund&quot; and collectively, the &quot;Trian Funds&quot;).</footnote>
        <footnote id="F3">(FN 2, contd.) Trian Partners General Partner, LLC is the general partner of Trian Partners GP, L.P. which is the general partner of Trian Onshore and Trian Offshore. Trian Partners Parallel Fund I General Partner, LLC is the general partner of Parallel Fund I. Trian Partners Strategic Investment Fund General Partner, LLC is the general partner of Trian Partners Strategic Investment Fund GP, L.P., which is the general partner of Strategic Fund.</footnote>
        <footnote id="F4">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 Partners, L.P., Trian Partners Master Fund, L.P., Trian Partners Parallel Fund I, L.P., Trian Partners Strategic Investment Fund, L.P. (collectively, the &quot;Trian Funds&quot;), Trian Partners GP, L.P. (&quot;Trian GP&quot;) and Trian Partners Strategic Investment Fund GP, L.P. (collectively with the Trian Funds and Trian GP, the &quot;LP 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 LP Entities have filed a separate Form 4 that relates to the same securities and transactions reported herein. Thus, in total, there are 11 joint filers: the LP Entities,Trian Fund Management, L.P. (&quot;Trian Management&quot;) and each of the other persons that is signatory to this Form 4.  Nelson Peltz, Peter W. May and Edward P. Garden are members of Trian Fund Management GP, LLC, the general partner of Trian Management, which serves as the management company for the Trian Funds, and are members of Trian Partners General Partner, LLC, the general partner of Trian GP, and as such are in a position to determine the investment and voting decisions made on behalf of each of the 11 joint filers. Messrs. Peltz, May and Garden currently report their holdings and transactions in the Issuer's securities in separate filings. The transactions reported in this filing and the filing by the other joint filers are also reported in the filings made by each of Messrs. Peltz, May and Garden and in each case relate to the same securities. In addition, the holdings of securities of the Issuer reported in this filing and in the filing by the other joint filers are also reported in the filings made by each of Messrs. Peltz, May and Garden as indirectly owned by each of them and in each case relate to the same shares.</remarks>

    <ownerSignature>
        <signatureName>Trian Fund Management, L.P., By: Trian Fund Management GP, LLC, General Partner, By: Edward P. Garden</signatureName>
        <signatureDate>2012-02-09</signatureDate>
    </ownerSignature>

    <ownerSignature>
        <signatureName>Edward P. Garden, Member</signatureName>
        <signatureDate>2012-02-09</signatureDate>
    </ownerSignature>

    <ownerSignature>
        <signatureName>Edward P. Garden, Member</signatureName>
        <signatureDate>2012-02-09</signatureDate>
    </ownerSignature>

    <ownerSignature>
        <signatureName>Edward P. Garden, Member</signatureName>
        <signatureDate>2012-02-09</signatureDate>
    </ownerSignature>

    <ownerSignature>
        <signatureName>Edward P. Garden, Member</signatureName>
        <signatureDate>2012-02-09</signatureDate>
    </ownerSignature>
</ownershipDocument>
