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

    <schemaVersion>X0206</schemaVersion>

    <documentType>3/A</documentType>

    <periodOfReport>2020-06-10</periodOfReport>

    <dateOfOriginalSubmission>2020-06-12</dateOfOriginalSubmission>

    <noSecuritiesOwned>1</noSecuritiesOwned>

    <issuer>
        <issuerCik>0001806201</issuerCik>
        <issuerName>Nebula Parent Corp.</issuerName>
        <issuerTradingSymbol>LPRO</issuerTradingSymbol>
    </issuer>

    <reportingOwner>
        <reportingOwnerId>
            <rptOwnerCik>0001767764</rptOwnerCik>
            <rptOwnerName>Van Buren Brandon</rptOwnerName>
        </reportingOwnerId>
        <reportingOwnerAddress>
            <rptOwnerStreet1>C/O TRUE WIND CAPITAL MANAGEMENT, L.P.</rptOwnerStreet1>
            <rptOwnerStreet2>FOUR EMBARCADERO CENTER, SUITE 2100</rptOwnerStreet2>
            <rptOwnerCity>SAN FRANCISCO</rptOwnerCity>
            <rptOwnerState>CA</rptOwnerState>
            <rptOwnerZipCode>94111</rptOwnerZipCode>
            <rptOwnerStateDescription></rptOwnerStateDescription>
        </reportingOwnerAddress>
        <reportingOwnerRelationship>
            <isDirector>1</isDirector>
            <isOfficer>0</isOfficer>
            <isTenPercentOwner>0</isTenPercentOwner>
            <isOther>0</isOther>
        </reportingOwnerRelationship>
    </reportingOwner>

    <footnotes></footnotes>

    <remarks>Mr. Van Buren, an employee of True Wind Capital Management, L.P. (&quot;True Wind Capital&quot;), is a member of the board of directors of the Issuer. Certain affiliates of True Wind Capital have filed a separate Form 3 reporting securities of the Issuer that they may be deemed to beneficially own. Mr. Van Buren disclaims beneficial ownership of any securities of the Issuer that may be deemed to be beneficially owned by affiliates of True Wind Capital.

This Form 3/A is being filed to correct an error in the number of shares reported on the Form 3 filed by the Reporting Person on June 10, 2020.</remarks>

    <ownerSignature>
        <signatureName>By: /s/ Brandon Van Buren</signatureName>
        <signatureDate>2020-06-12</signatureDate>
    </ownerSignature>
</ownershipDocument>
