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

    <schemaVersion>X0306</schemaVersion>

    <documentType>4</documentType>

    <periodOfReport>2020-03-30</periodOfReport>

    <notSubjectToSection16>1</notSubjectToSection16>

    <issuer>
        <issuerCik>0001422841</issuerCik>
        <issuerName>AquaVenture Holdings Ltd</issuerName>
        <issuerTradingSymbol>WAAS</issuerTradingSymbol>
    </issuer>

    <reportingOwner>
        <reportingOwnerId>
            <rptOwnerCik>0001034196</rptOwnerCik>
            <rptOwnerName>ADVENT INTERNATIONAL CORP/MA</rptOwnerName>
        </reportingOwnerId>
        <reportingOwnerAddress>
            <rptOwnerStreet1>800 BOYLSTON STREET SUITE 3300</rptOwnerStreet1>
            <rptOwnerStreet2></rptOwnerStreet2>
            <rptOwnerCity>BOSTON</rptOwnerCity>
            <rptOwnerState>MA</rptOwnerState>
            <rptOwnerZipCode>02199</rptOwnerZipCode>
            <rptOwnerStateDescription></rptOwnerStateDescription>
        </reportingOwnerAddress>
        <reportingOwnerRelationship>
            <isDirector>0</isDirector>
            <isOfficer>0</isOfficer>
            <isTenPercentOwner>1</isTenPercentOwner>
            <isOther>0</isOther>
        </reportingOwnerRelationship>
    </reportingOwner>

    <reportingOwner>
        <reportingOwnerId>
            <rptOwnerCik>0001677055</rptOwnerCik>
            <rptOwnerName>Advent Partners GPE VIII-A Cayman Limited Partnership</rptOwnerName>
        </reportingOwnerId>
        <reportingOwnerAddress>
            <rptOwnerStreet1>C/O ADVENT INTERNATIONAL CORPORATION</rptOwnerStreet1>
            <rptOwnerStreet2>100 NORTHERN AVENUE</rptOwnerStreet2>
            <rptOwnerCity>BOSTON</rptOwnerCity>
            <rptOwnerState>MA</rptOwnerState>
            <rptOwnerZipCode>02199</rptOwnerZipCode>
            <rptOwnerStateDescription></rptOwnerStateDescription>
        </reportingOwnerAddress>
        <reportingOwnerRelationship>
            <isDirector>0</isDirector>
            <isOfficer>0</isOfficer>
            <isTenPercentOwner>1</isTenPercentOwner>
            <isOther>0</isOther>
        </reportingOwnerRelationship>
    </reportingOwner>

    <reportingOwner>
        <reportingOwnerId>
            <rptOwnerCik>0001676941</rptOwnerCik>
            <rptOwnerName>Advent Partners GPE VIII Limited Partnership</rptOwnerName>
        </reportingOwnerId>
        <reportingOwnerAddress>
            <rptOwnerStreet1>C/O ADVENT INTERNATIONAL CORPORATION</rptOwnerStreet1>
            <rptOwnerStreet2>800 BOYLSON STREET, SUITE 3300</rptOwnerStreet2>
            <rptOwnerCity>BOSTON</rptOwnerCity>
            <rptOwnerState>MA</rptOwnerState>
            <rptOwnerZipCode>02199</rptOwnerZipCode>
            <rptOwnerStateDescription></rptOwnerStateDescription>
        </reportingOwnerAddress>
        <reportingOwnerRelationship>
            <isDirector>0</isDirector>
            <isOfficer>0</isOfficer>
            <isTenPercentOwner>1</isTenPercentOwner>
            <isOther>0</isOther>
        </reportingOwnerRelationship>
    </reportingOwner>

    <reportingOwner>
        <reportingOwnerId>
            <rptOwnerCik>0001664594</rptOwnerCik>
            <rptOwnerName>Advent International GPE VIII-A Limited Partnership</rptOwnerName>
        </reportingOwnerId>
        <reportingOwnerAddress>
            <rptOwnerStreet1>800 BOYLSTON STREET SUITE 3300</rptOwnerStreet1>
            <rptOwnerStreet2></rptOwnerStreet2>
            <rptOwnerCity>BOSTON</rptOwnerCity>
            <rptOwnerState>MA</rptOwnerState>
            <rptOwnerZipCode>02199</rptOwnerZipCode>
            <rptOwnerStateDescription></rptOwnerStateDescription>
        </reportingOwnerAddress>
        <reportingOwnerRelationship>
            <isDirector>0</isDirector>
            <isOfficer>0</isOfficer>
            <isTenPercentOwner>1</isTenPercentOwner>
            <isOther>0</isOther>
        </reportingOwnerRelationship>
    </reportingOwner>

    <reportingOwner>
        <reportingOwnerId>
            <rptOwnerCik>0001664585</rptOwnerCik>
            <rptOwnerName>Advent International GPE VIII-E Limited Partnership</rptOwnerName>
        </reportingOwnerId>
        <reportingOwnerAddress>
            <rptOwnerStreet1>800 BOYLSTON STREET, SUITE 3300</rptOwnerStreet1>
            <rptOwnerStreet2></rptOwnerStreet2>
            <rptOwnerCity>BOSTON</rptOwnerCity>
            <rptOwnerState>MA</rptOwnerState>
            <rptOwnerZipCode>02199</rptOwnerZipCode>
            <rptOwnerStateDescription></rptOwnerStateDescription>
        </reportingOwnerAddress>
        <reportingOwnerRelationship>
            <isDirector>0</isDirector>
            <isOfficer>0</isOfficer>
            <isTenPercentOwner>1</isTenPercentOwner>
            <isOther>0</isOther>
        </reportingOwnerRelationship>
    </reportingOwner>

    <reportingOwner>
        <reportingOwnerId>
            <rptOwnerCik>0001664583</rptOwnerCik>
            <rptOwnerName>Advent International GPE VIII-G Limited Partnership</rptOwnerName>
        </reportingOwnerId>
        <reportingOwnerAddress>
            <rptOwnerStreet1>800 BOYLSTON STREET, SUITE 3300</rptOwnerStreet1>
            <rptOwnerStreet2></rptOwnerStreet2>
            <rptOwnerCity>BOSTON</rptOwnerCity>
            <rptOwnerState>MA</rptOwnerState>
            <rptOwnerZipCode>02199</rptOwnerZipCode>
            <rptOwnerStateDescription></rptOwnerStateDescription>
        </reportingOwnerAddress>
        <reportingOwnerRelationship>
            <isDirector>0</isDirector>
            <isOfficer>0</isOfficer>
            <isTenPercentOwner>1</isTenPercentOwner>
            <isOther>0</isOther>
        </reportingOwnerRelationship>
    </reportingOwner>

    <reportingOwner>
        <reportingOwnerId>
            <rptOwnerCik>0001665371</rptOwnerCik>
            <rptOwnerName>Advent International GPE VIII-K Limited Partnership</rptOwnerName>
        </reportingOwnerId>
        <reportingOwnerAddress>
            <rptOwnerStreet1>800 BOYLSTON STREET, SUITE 3300</rptOwnerStreet1>
            <rptOwnerStreet2></rptOwnerStreet2>
            <rptOwnerCity>BOSTON</rptOwnerCity>
            <rptOwnerState>MA</rptOwnerState>
            <rptOwnerZipCode>02199</rptOwnerZipCode>
            <rptOwnerStateDescription></rptOwnerStateDescription>
        </reportingOwnerAddress>
        <reportingOwnerRelationship>
            <isDirector>0</isDirector>
            <isOfficer>0</isOfficer>
            <isTenPercentOwner>1</isTenPercentOwner>
            <isOther>0</isOther>
        </reportingOwnerRelationship>
    </reportingOwner>

    <reportingOwner>
        <reportingOwnerId>
            <rptOwnerCik>0001665977</rptOwnerCik>
            <rptOwnerName>Advent International GPE VIII-L Limited Partnership</rptOwnerName>
        </reportingOwnerId>
        <reportingOwnerAddress>
            <rptOwnerStreet1>800 BOYLSTON STREET, SUITE 3300</rptOwnerStreet1>
            <rptOwnerStreet2></rptOwnerStreet2>
            <rptOwnerCity>BOSTON</rptOwnerCity>
            <rptOwnerState>MA</rptOwnerState>
            <rptOwnerZipCode>02199</rptOwnerZipCode>
            <rptOwnerStateDescription></rptOwnerStateDescription>
        </reportingOwnerAddress>
        <reportingOwnerRelationship>
            <isDirector>0</isDirector>
            <isOfficer>0</isOfficer>
            <isTenPercentOwner>1</isTenPercentOwner>
            <isOther>0</isOther>
        </reportingOwnerRelationship>
    </reportingOwner>

    <reportingOwner>
        <reportingOwnerId>
            <rptOwnerCik>0001506911</rptOwnerCik>
            <rptOwnerName>CULLIGAN INTERNATIONAL Co</rptOwnerName>
        </reportingOwnerId>
        <reportingOwnerAddress>
            <rptOwnerStreet1>9399 WEST HIGGINS ROAD</rptOwnerStreet1>
            <rptOwnerStreet2>SUITE 1100</rptOwnerStreet2>
            <rptOwnerCity>ROSEMONT</rptOwnerCity>
            <rptOwnerState>IL</rptOwnerState>
            <rptOwnerZipCode>60018</rptOwnerZipCode>
            <rptOwnerStateDescription></rptOwnerStateDescription>
        </reportingOwnerAddress>
        <reportingOwnerRelationship>
            <isDirector>0</isDirector>
            <isOfficer>0</isOfficer>
            <isTenPercentOwner>1</isTenPercentOwner>
            <isOther>0</isOther>
        </reportingOwnerRelationship>
    </reportingOwner>

    <nonDerivativeTable>
        <nonDerivativeTransaction>
            <securityTitle>
                <value>Ordinary Shares, no par value</value>
                <footnoteId id="F1"/>
            </securityTitle>
            <transactionDate>
                <value>2020-03-30</value>
            </transactionDate>
            <transactionCoding>
                <transactionFormType>4</transactionFormType>
                <transactionCode>P</transactionCode>
                <equitySwapInvolved>0</equitySwapInvolved>
                <footnoteId id="F1"/>
            </transactionCoding>
            <transactionTimeliness>
                <value></value>
            </transactionTimeliness>
            <transactionAmounts>
                <transactionShares>
                    <value>31971571</value>
                    <footnoteId id="F1"/>
                </transactionShares>
                <transactionPricePerShare>
                    <value>27.10</value>
                    <footnoteId id="F1"/>
                </transactionPricePerShare>
                <transactionAcquiredDisposedCode>
                    <value>A</value>
                </transactionAcquiredDisposedCode>
            </transactionAmounts>
            <postTransactionAmounts>
                <sharesOwnedFollowingTransaction>
                    <value>100</value>
                    <footnoteId id="F2"/>
                </sharesOwnedFollowingTransaction>
            </postTransactionAmounts>
            <ownershipNature>
                <directOrIndirectOwnership>
                    <value>D</value>
                </directOrIndirectOwnership>
            </ownershipNature>
        </nonDerivativeTransaction>
    </nonDerivativeTable>

    <footnotes>
        <footnote id="F1">On March 30, 2020, Culligan International Company (&quot;Culligan&quot;), Amberjack Merger Sub Limited (&quot;Merger Sub&quot;) and the Issuer completed the transactions contemplated by the Agreement and Plan of Merger, dated December 23, 2019, by and among Culligan, Merger Sub and the Issuer (the &quot;Merger Agreement&quot;). Pursuant to the terms of the Merger Agreement, Merger Sub merged with and into the Issuer (the &quot;Merger&quot;), with the Issuer surviving (the &quot;Surviving Entity&quot;) the Merger as a subsidiary of Culligan. At the effective time of the Merger, each outstanding ordinary share, no par value of Issuer was cancelled and converted into the right to receive $27.10 in cash, without interest.</footnote>
        <footnote id="F2">Prior to the Merger, Culligan, together with affiliates of Advent International Corporation, held 100 ordinary shares of Merger Sub, no par value per share, which shares represented all of the issued and outstanding capital stock of Merger Sub. As a result of the Merger, each of the 100 ordinary shares of Merger Sub issued and outstanding immediately prior to the effective time of the Merger was converted into and became one validly issued, fully paid and non-assessable ordinary share of the Surviving Entity.</footnote>
    </footnotes>

    <remarks>This Form 4 is the third of three Forms 4 being filed relating to the same event. The Form 4 has been split into three filings because there are more than 10 Reporting Persons in total, and the SEC's EDGAR filing system limits a single Form 4 to a maximum of 10 Reporting Persons.</remarks>

    <ownerSignature>
        <signatureName>ADVENT INTERNATIONAL CORPORATION /s/ James Westra, General Counsel and Managing Partner</signatureName>
        <signatureDate>2020-04-01</signatureDate>
    </ownerSignature>

    <ownerSignature>
        <signatureName>CULLIGAN INTERNATIONAL COMPANY /s/ Frank John Griffith, Vice President and General Counsel</signatureName>
        <signatureDate>2020-04-01</signatureDate>
    </ownerSignature>

    <ownerSignature>
        <signatureName>ADVENT PARTNERS GPE VIII-A CAYMAN LIMITED PARTNERSHIP By: AP GPE VIII GP LIMITED PARTNERSHIP, GP By: ADVENT INTERNATIONAL GPE VIII, LLC, GP By: ADVENT INTERNATIONAL CORPORATION, MGR /s/ James Westra, GC and Managing Partner</signatureName>
        <signatureDate>2020-04-01</signatureDate>
    </ownerSignature>

    <ownerSignature>
        <signatureName>ADVENT PARTNERS GPE VIII LIMITED PARTNERSHIP By: AP GPE VIII GP LIMITED PARTNERSHIP, GP By: ADVENT INTERNATIONAL GPE VIII, LLC, GP By: ADVENT INTERNATIONAL CORPORATION, MGR /s/ James Westra, GC and Managing Partner</signatureName>
        <signatureDate>2020-04-01</signatureDate>
    </ownerSignature>

    <ownerSignature>
        <signatureName>ADVENT INTERNATIONAL GPE VIII-A LIMITED PARTNERSHIP By: GPE VIII GP LIMITED PARTNERSHIP, GP By: ADVENT INTERNATIONAL GPE VIII, LLC, GP By: ADVENT INTERNATIONAL CORPORATION, MGR /s/ James Westra, GC and Managing Partner</signatureName>
        <signatureDate>2020-04-01</signatureDate>
    </ownerSignature>

    <ownerSignature>
        <signatureName>ADVENT INTERNATIONAL GPE VIII-E LIMITED PARTNERSHIP By: GPE VIII GP LIMITED PARTNERSHIP, GP By: ADVENT INTERNATIONAL GPE VIII, LLC, GP By: ADVENT INTERNATIONAL CORPORATION, MGR /s/ James Westra, GC and Managing Partner</signatureName>
        <signatureDate>2020-04-01</signatureDate>
    </ownerSignature>

    <ownerSignature>
        <signatureName>ADVENT INTERNATIONAL GPE VIII-G LIMITED PARTNERSHIP By: GPE VIII GP LIMITED PARTNERSHIP, GP By: ADVENT INTERNATIONAL GPE VIII, LLC, GP By: ADVENT INTERNATIONAL CORPORATION, MGR /s/ James Westra, GC and Managing Partner</signatureName>
        <signatureDate>2020-04-01</signatureDate>
    </ownerSignature>

    <ownerSignature>
        <signatureName>ADVENT INTERNATIONAL GPE VIII-K LIMITED PARTNERSHIP By: GPE VIII GP LIMITED PARTNERSHIP, GP By: ADVENT INTERNATIONAL GPE VIII, LLC, GP By: ADVENT INTERNATIONAL CORPORATION, MGR /s/ James Westra, GC and Managing Partner</signatureName>
        <signatureDate>2020-04-01</signatureDate>
    </ownerSignature>

    <ownerSignature>
        <signatureName>ADVENT INTERNATIONAL GPE VIII-L LIMITED PARTNERSHIP By: GPE VIII GP LIMITED PARTNERSHIP, GP By: ADVENT INTERNATIONAL GPE VIII, LLC, GP By: ADVENT INTERNATIONAL CORPORATION, MGR /s/ James Westra, GC and Managing Partner</signatureName>
        <signatureDate>2020-04-01</signatureDate>
    </ownerSignature>
</ownershipDocument>
