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

    <schemaVersion>X0306</schemaVersion>

    <documentType>4/A</documentType>

    <periodOfReport>2017-08-15</periodOfReport>

    <dateOfOriginalSubmission>2017-08-17</dateOfOriginalSubmission>

    <notSubjectToSection16>1</notSubjectToSection16>

    <issuer>
        <issuerCik>0001325702</issuerCik>
        <issuerName>MAGNACHIP SEMICONDUCTOR Corp</issuerName>
        <issuerTradingSymbol>MX</issuerTradingSymbol>
    </issuer>

    <reportingOwner>
        <reportingOwnerId>
            <rptOwnerCik>0001259927</rptOwnerCik>
            <rptOwnerName>LASRY MARC</rptOwnerName>
        </reportingOwnerId>
        <reportingOwnerAddress>
            <rptOwnerStreet1>C/O AVENUE CAPITAL MANAGEMENT II, L.P.</rptOwnerStreet1>
            <rptOwnerStreet2>399 PARK AVENUE, 6TH FLOOR</rptOwnerStreet2>
            <rptOwnerCity>NEW YORK</rptOwnerCity>
            <rptOwnerState>NY</rptOwnerState>
            <rptOwnerZipCode>10022</rptOwnerZipCode>
            <rptOwnerStateDescription></rptOwnerStateDescription>
        </reportingOwnerAddress>
        <reportingOwnerRelationship>
            <isDirector>1</isDirector>
            <isOfficer>0</isOfficer>
            <isTenPercentOwner>1</isTenPercentOwner>
            <isOther>0</isOther>
        </reportingOwnerRelationship>
    </reportingOwner>

    <reportingOwner>
        <reportingOwnerId>
            <rptOwnerCik>0001450166</rptOwnerCik>
            <rptOwnerName>Avenue International Master, L.P.</rptOwnerName>
        </reportingOwnerId>
        <reportingOwnerAddress>
            <rptOwnerStreet1>C/O AVENUE CAPITAL MANAGEMENT II, L.P.</rptOwnerStreet1>
            <rptOwnerStreet2>399 PARK AVENUE, 6TH FLOOR</rptOwnerStreet2>
            <rptOwnerCity>NEW YORK</rptOwnerCity>
            <rptOwnerState>NY</rptOwnerState>
            <rptOwnerZipCode>10022</rptOwnerZipCode>
            <rptOwnerStateDescription></rptOwnerStateDescription>
        </reportingOwnerAddress>
        <reportingOwnerRelationship>
            <isDirector>1</isDirector>
            <isOfficer>0</isOfficer>
            <isTenPercentOwner>1</isTenPercentOwner>
            <isOther>0</isOther>
        </reportingOwnerRelationship>
    </reportingOwner>

    <reportingOwner>
        <reportingOwnerId>
            <rptOwnerCik>0001180908</rptOwnerCik>
            <rptOwnerName>AVENUE INTERNATIONAL, LTD.</rptOwnerName>
        </reportingOwnerId>
        <reportingOwnerAddress>
            <rptOwnerStreet1>C/O AVENUE CAPITAL MANAGEMENT II, L.P.</rptOwnerStreet1>
            <rptOwnerStreet2>399 PARK AVENUE, 6TH FLOOR</rptOwnerStreet2>
            <rptOwnerCity>NEW YORK</rptOwnerCity>
            <rptOwnerState>NY</rptOwnerState>
            <rptOwnerZipCode>10022</rptOwnerZipCode>
            <rptOwnerStateDescription></rptOwnerStateDescription>
        </reportingOwnerAddress>
        <reportingOwnerRelationship>
            <isDirector>1</isDirector>
            <isOfficer>0</isOfficer>
            <isTenPercentOwner>1</isTenPercentOwner>
            <isOther>0</isOther>
        </reportingOwnerRelationship>
    </reportingOwner>

    <reportingOwner>
        <reportingOwnerId>
            <rptOwnerCik>0001495478</rptOwnerCik>
            <rptOwnerName>Avenue International Master GenPar, Ltd.</rptOwnerName>
        </reportingOwnerId>
        <reportingOwnerAddress>
            <rptOwnerStreet1>C/O AVENUE CAPITAL MANAGEMENT II, L.P.</rptOwnerStreet1>
            <rptOwnerStreet2>399 PARK AVENUE, 6TH FLOOR</rptOwnerStreet2>
            <rptOwnerCity>NEW YORK</rptOwnerCity>
            <rptOwnerState>NY</rptOwnerState>
            <rptOwnerZipCode>10022</rptOwnerZipCode>
            <rptOwnerStateDescription></rptOwnerStateDescription>
        </reportingOwnerAddress>
        <reportingOwnerRelationship>
            <isDirector>1</isDirector>
            <isOfficer>0</isOfficer>
            <isTenPercentOwner>1</isTenPercentOwner>
            <isOther>0</isOther>
        </reportingOwnerRelationship>
    </reportingOwner>

    <reportingOwner>
        <reportingOwnerId>
            <rptOwnerCik>0001495476</rptOwnerCik>
            <rptOwnerName>Avenue Partners, LLC</rptOwnerName>
        </reportingOwnerId>
        <reportingOwnerAddress>
            <rptOwnerStreet1>C/O AVENUE CAPITAL MANAGEMENT II, L.P.</rptOwnerStreet1>
            <rptOwnerStreet2>399 PARK AVENUE, 6TH FLOOR</rptOwnerStreet2>
            <rptOwnerCity>NEW YORK</rptOwnerCity>
            <rptOwnerState>NY</rptOwnerState>
            <rptOwnerZipCode>10022</rptOwnerZipCode>
            <rptOwnerStateDescription></rptOwnerStateDescription>
        </reportingOwnerAddress>
        <reportingOwnerRelationship>
            <isDirector>1</isDirector>
            <isOfficer>0</isOfficer>
            <isTenPercentOwner>1</isTenPercentOwner>
            <isOther>0</isOther>
        </reportingOwnerRelationship>
    </reportingOwner>

    <reportingOwner>
        <reportingOwnerId>
            <rptOwnerCik>0001317338</rptOwnerCik>
            <rptOwnerName>Avenue Capital Management II, L.P.</rptOwnerName>
        </reportingOwnerId>
        <reportingOwnerAddress>
            <rptOwnerStreet1>399 PARK AVENUE, 6TH FLOOR</rptOwnerStreet1>
            <rptOwnerStreet2></rptOwnerStreet2>
            <rptOwnerCity>NEW YORK</rptOwnerCity>
            <rptOwnerState>NY</rptOwnerState>
            <rptOwnerZipCode>10022</rptOwnerZipCode>
            <rptOwnerStateDescription></rptOwnerStateDescription>
        </reportingOwnerAddress>
        <reportingOwnerRelationship>
            <isDirector>1</isDirector>
            <isOfficer>0</isOfficer>
            <isTenPercentOwner>1</isTenPercentOwner>
            <isOther>0</isOther>
        </reportingOwnerRelationship>
    </reportingOwner>

    <reportingOwner>
        <reportingOwnerId>
            <rptOwnerCik>0001389850</rptOwnerCik>
            <rptOwnerName>Avenue Capital Management II GenPar, LLC</rptOwnerName>
        </reportingOwnerId>
        <reportingOwnerAddress>
            <rptOwnerStreet1>399 PARK AVENUE, 6TH FLOOR</rptOwnerStreet1>
            <rptOwnerStreet2></rptOwnerStreet2>
            <rptOwnerCity>NEW YORK</rptOwnerCity>
            <rptOwnerState>NY</rptOwnerState>
            <rptOwnerZipCode>10022</rptOwnerZipCode>
            <rptOwnerStateDescription></rptOwnerStateDescription>
        </reportingOwnerAddress>
        <reportingOwnerRelationship>
            <isDirector>1</isDirector>
            <isOfficer>0</isOfficer>
            <isTenPercentOwner>1</isTenPercentOwner>
            <isOther>0</isOther>
        </reportingOwnerRelationship>
    </reportingOwner>

    <footnotes></footnotes>

    <remarks>This Form 4 amendment is being filed solely to remove the sentence under &quot;Remarks&quot; that was included in the Form 4 filed by the reporting persons on August 17, 2017.</remarks>

    <ownerSignature>
        <signatureName>Avenue International Master, L.P. By: Avenue International Master GenPar, Ltd., its General Partner, By: /s/ Eric Ross, attorney-in-fact for Marc Lasry,
Director</signatureName>
        <signatureDate>2017-08-17</signatureDate>
    </ownerSignature>

    <ownerSignature>
        <signatureName>Avenue International, Ltd., By: /s/ Eric Ross, attorney-in-fact for Marc Lasry, Director</signatureName>
        <signatureDate>2017-08-17</signatureDate>
    </ownerSignature>

    <ownerSignature>
        <signatureName>Avenue International Master GenPar, Ltd., By: /s/ Eric Ross, attorney-in-fact for Marc Lasry, Director</signatureName>
        <signatureDate>2017-08-17</signatureDate>
    </ownerSignature>

    <ownerSignature>
        <signatureName>Avenue Partners, LLC, By: /s/ Eric Ross, attorney-in-fact for Marc Lasry, Managing Member</signatureName>
        <signatureDate>2017-08-17</signatureDate>
    </ownerSignature>

    <ownerSignature>
        <signatureName>Avenue Capital Management II, L.P., By: Avenue Capital Management II GenPar, LLC, its General Partner, By: /s/ Eric Ross, attorney-in-fact for Marc
Lasry, Managing Member</signatureName>
        <signatureDate>2017-08-17</signatureDate>
    </ownerSignature>

    <ownerSignature>
        <signatureName>Avenue Capital Management II, GenPar, LLC, By: /s/ Eric Ross, attorney-in-fact for Marc Lasry, Managing Member</signatureName>
        <signatureDate>2017-08-17</signatureDate>
    </ownerSignature>

    <ownerSignature>
        <signatureName>/s/ Eric Ross, attorney-in-fact for Marc Lasry</signatureName>
        <signatureDate>2017-08-17</signatureDate>
    </ownerSignature>
</ownershipDocument>
