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

    <schemaVersion>X0306</schemaVersion>

    <documentType>4</documentType>

    <periodOfReport>2017-06-05</periodOfReport>

    <notSubjectToSection16>0</notSubjectToSection16>

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

    <reportingOwner>
        <reportingOwnerId>
            <rptOwnerCik>0000928265</rptOwnerCik>
            <rptOwnerName>PELTZ NELSON</rptOwnerName>
        </reportingOwnerId>
        <reportingOwnerAddress>
            <rptOwnerStreet1>280 PARK AVENUE</rptOwnerStreet1>
            <rptOwnerStreet2></rptOwnerStreet2>
            <rptOwnerCity>NEW YORK</rptOwnerCity>
            <rptOwnerState>NY</rptOwnerState>
            <rptOwnerZipCode>10017</rptOwnerZipCode>
            <rptOwnerStateDescription></rptOwnerStateDescription>
        </reportingOwnerAddress>
        <reportingOwnerRelationship>
            <isDirector>1</isDirector>
            <isOfficer>0</isOfficer>
            <isTenPercentOwner>1</isTenPercentOwner>
            <isOther>0</isOther>
        </reportingOwnerRelationship>
    </reportingOwner>

    <nonDerivativeTable>
        <nonDerivativeTransaction>
            <securityTitle>
                <value>Common Stock</value>
            </securityTitle>
            <transactionDate>
                <value>2017-06-05</value>
            </transactionDate>
            <deemedExecutionDate></deemedExecutionDate>
            <transactionCoding>
                <transactionFormType>4</transactionFormType>
                <transactionCode>S</transactionCode>
                <equitySwapInvolved>0</equitySwapInvolved>
            </transactionCoding>
            <transactionTimeliness>
                <value></value>
            </transactionTimeliness>
            <transactionAmounts>
                <transactionShares>
                    <value>5500000</value>
                    <footnoteId id="F1"/>
                </transactionShares>
                <transactionPricePerShare>
                    <value>15.97</value>
                </transactionPricePerShare>
                <transactionAcquiredDisposedCode>
                    <value>D</value>
                </transactionAcquiredDisposedCode>
            </transactionAmounts>
            <postTransactionAmounts>
                <sharesOwnedFollowingTransaction>
                    <value>39035921</value>
                </sharesOwnedFollowingTransaction>
            </postTransactionAmounts>
            <ownershipNature>
                <directOrIndirectOwnership>
                    <value>I</value>
                </directOrIndirectOwnership>
                <natureOfOwnership>
                    <value>By Trian Partners</value>
                    <footnoteId id="F2"/>
                    <footnoteId id="F3"/>
                </natureOfOwnership>
            </ownershipNature>
        </nonDerivativeTransaction>
        <nonDerivativeHolding>
            <securityTitle>
                <value>Common Stock</value>
            </securityTitle>
            <postTransactionAmounts>
                <sharesOwnedFollowingTransaction>
                    <value>9889064</value>
                </sharesOwnedFollowingTransaction>
            </postTransactionAmounts>
            <ownershipNature>
                <directOrIndirectOwnership>
                    <value>D</value>
                </directOrIndirectOwnership>
            </ownershipNature>
        </nonDerivativeHolding>
        <nonDerivativeHolding>
            <securityTitle>
                <value>Common Stock</value>
            </securityTitle>
            <postTransactionAmounts>
                <sharesOwnedFollowingTransaction>
                    <value>132397</value>
                </sharesOwnedFollowingTransaction>
            </postTransactionAmounts>
            <ownershipNature>
                <directOrIndirectOwnership>
                    <value>I</value>
                </directOrIndirectOwnership>
                <natureOfOwnership>
                    <value>By Peltz 2009 Family Trust</value>
                    <footnoteId id="F4"/>
                    <footnoteId id="F5"/>
                </natureOfOwnership>
            </ownershipNature>
        </nonDerivativeHolding>
        <nonDerivativeHolding>
            <securityTitle>
                <value>Common Stock</value>
            </securityTitle>
            <postTransactionAmounts>
                <sharesOwnedFollowingTransaction>
                    <value>81494</value>
                </sharesOwnedFollowingTransaction>
            </postTransactionAmounts>
            <ownershipNature>
                <directOrIndirectOwnership>
                    <value>I</value>
                </directOrIndirectOwnership>
                <natureOfOwnership>
                    <value>By Children</value>
                    <footnoteId id="F5"/>
                    <footnoteId id="F6"/>
                </natureOfOwnership>
            </ownershipNature>
        </nonDerivativeHolding>
        <nonDerivativeHolding>
            <securityTitle>
                <value>Common Stock</value>
            </securityTitle>
            <postTransactionAmounts>
                <sharesOwnedFollowingTransaction>
                    <value>44169</value>
                </sharesOwnedFollowingTransaction>
            </postTransactionAmounts>
            <ownershipNature>
                <directOrIndirectOwnership>
                    <value>I</value>
                </directOrIndirectOwnership>
                <natureOfOwnership>
                    <value>By Spouse</value>
                    <footnoteId id="F5"/>
                </natureOfOwnership>
            </ownershipNature>
        </nonDerivativeHolding>
    </nonDerivativeTable>

    <footnotes>
        <footnote id="F1">The sales reported in this Form 4 were principally in connection with the sale of all of the shares of common stock of the issuer owned directly by one of the funds managed by Trian Management (as defined below) in connection with the upcoming expiration of the eight-year term of such fund.</footnote>
        <footnote id="F2">Trian Fund Management, L.P. (&quot;Trian Management&quot;) serves as the management company for Trian Partners, L.P., Trian Partners Master Fund, L.P., Trian Partners Parallel Fund I, L.P., Trian Partners Strategic Fund-G II L.P., Trian Partners Strategic Fund-G III, L.P., Trian Partners Strategic Fund-K, L.P., and Trian Partners Strategic Fund-C, Ltd. (collectively, the &quot;Trian Funds&quot;), and as such determines the investment and voting decisions of the Trian Funds with respect to the shares of the Issuer held by them. Mr. Peltz is a member of Trian Fund Management GP, LLC, which is the general partner of Trian Management, and as such is in a position to determine the investment and voting decisions made by Trian Management on behalf of the Trian Funds.</footnote>
        <footnote id="F3">(FN 2, contd.) Mr. Peltz is also a member of Trian Partners General Partner, LLC (&quot;Trian GP LLC&quot;), the general partner of Trian Partners GP, L.P. (&quot;Trian GP&quot;), and as such is in a position to determine the investment and voting decisions made by Trian GP LLC on behalf of Trian GP.  Accordingly, Mr. Peltz may be deemed to indirectly beneficially own (as that term is defined in Rule 13d-3 under the Securities Exchange Act of 1934) the shares beneficially owned by the Trian Funds and Trian GP. Mr. Peltz disclaims beneficial ownership of such shares except to the extent of his pecuniary interest therein and this report shall not be deemed an admission that the reporting person is the beneficial owner of such securities for purposes of Section 16 or for any other purpose.</footnote>
        <footnote id="F4">All such shares are owned by the Peltz 2009 Family Trust for the benefit of Mr. Peltz's children. Mr. Peltz's spouse is a trustee of the trust.</footnote>
        <footnote id="F5">The reporting person disclaims beneficial ownership of these securities, and this report shall not be deemed an admission that the reporting person is the beneficial owner of such securities for purposes of Section 16 or for any other purpose.</footnote>
        <footnote id="F6">Owned by minor and adult children living in the reporting person's household.</footnote>
    </footnotes>

    <remarks>The transactions involving securities of the Issuer referred to as being beneficially owned by Trian Partners that are reported in this filing are the same securities and transactions reported separately in the Form 4s filed by Peter W. May; Edward P. Garden; Matthew Peltz; Trian Fund Management, L.P.; Trian Partners General Partner, LLC; Trian Fund Management GP, 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 GP, L.P.; Trian Partners, L.P.; Trian Partners Master Fund, L.P.; Trian Partners Parallel Fund I, L.P.; Trian Partners Strategic Fund-G II, L.P.; Trian Partners Strategic Fund-G III, L.P.; Trian Partners Strategic Fund-K, L.P.; Trian Partners Strategic Fund-C, Ltd.; Trian Partners Strategic Fund-G II GP, L.P.; Trian Partners Strategic Fund-G III GP, L.P.; and Trian Partners Strategic Fund-K GP, L.P. (collectively, the &quot;Trian Entities&quot;). The shares of the Issuer referred to in this filing as beneficially owned by Trian Partners are the same shares as those reported to be beneficially owned by Trian Partners in the Form 4s filed by Peter W. May, Edward P. Garden, Matthew Peltz, and by the Trian Entities in the Form 4s filed by the Trian Entities.</remarks>

    <ownerSignature>
        <signatureName>Stuart I. Rosen, Attorney-In-Fact for Nelson Peltz</signatureName>
        <signatureDate>2017-06-07</signatureDate>
    </ownerSignature>
</ownershipDocument>
