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

    <schemaVersion>X0306</schemaVersion>

    <documentType>4</documentType>

    <periodOfReport>2015-05-27</periodOfReport>

    <notSubjectToSection16>0</notSubjectToSection16>

    <issuer>
        <issuerCik>0001590976</issuerCik>
        <issuerName>Malibu Boats, Inc.</issuerName>
        <issuerTradingSymbol>MBUU</issuerTradingSymbol>
    </issuer>

    <reportingOwner>
        <reportingOwnerId>
            <rptOwnerCik>0001598589</rptOwnerCik>
            <rptOwnerName>Hooks Michael K.</rptOwnerName>
        </reportingOwnerId>
        <reportingOwnerAddress>
            <rptOwnerStreet1>2000 AVENUE OF THE STARS, 11TH FLOOR</rptOwnerStreet1>
            <rptOwnerStreet2></rptOwnerStreet2>
            <rptOwnerCity>LOS ANGELES</rptOwnerCity>
            <rptOwnerState>CA</rptOwnerState>
            <rptOwnerZipCode>90067</rptOwnerZipCode>
            <rptOwnerStateDescription></rptOwnerStateDescription>
        </reportingOwnerAddress>
        <reportingOwnerRelationship>
            <isDirector>1</isDirector>
            <isOfficer>0</isOfficer>
            <isTenPercentOwner>1</isTenPercentOwner>
            <isOther>0</isOther>
        </reportingOwnerRelationship>
    </reportingOwner>

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            <securityTitle>
                <value>Class A Common Stock</value>
            </securityTitle>
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            </postTransactionAmounts>
            <ownershipNature>
                <directOrIndirectOwnership>
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                </directOrIndirectOwnership>
                <natureOfOwnership>
                    <value>See Footnote</value>
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                </natureOfOwnership>
            </ownershipNature>
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                    <value>See Footnote</value>
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                    <value>See Footnote</value>
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                <natureOfOwnership>
                    <value>See Footnote</value>
                    <footnoteId id="F3"/>
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        <nonDerivativeTransaction>
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                <value>Class A Common Stock</value>
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            <ownershipNature>
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                </directOrIndirectOwnership>
                <natureOfOwnership>
                    <value>See Footnote</value>
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        <nonDerivativeTransaction>
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                <value>Class A Common Stock</value>
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                    <value>See Footnote</value>
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                    <value>See Footnote</value>
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                    <value>See Footnote</value>
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                </directOrIndirectOwnership>
                <natureOfOwnership>
                    <value>See Footnote</value>
                    <footnoteId id="F3"/>
                </natureOfOwnership>
            </ownershipNature>
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        <nonDerivativeTransaction>
            <securityTitle>
                <value>Class B Common Stock</value>
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                <natureOfOwnership>
                    <value>See Footnote</value>
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                    <value>See Footnote</value>
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            <ownershipNature>
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                <natureOfOwnership>
                    <value>See Footnote</value>
                    <footnoteId id="F3"/>
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                    <value>See Footnote</value>
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                    <value>See Footnote</value>
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            <transactionCoding>
                <transactionFormType>4</transactionFormType>
                <transactionCode>C</transactionCode>
                <equitySwapInvolved>0</equitySwapInvolved>
                <footnoteId id="F2"/>
            </transactionCoding>
            <transactionTimeliness>
                <value></value>
            </transactionTimeliness>
            <transactionAmounts>
                <transactionShares>
                    <value>25136</value>
                </transactionShares>
                <transactionPricePerShare>
                    <value>0.00</value>
                </transactionPricePerShare>
                <transactionAcquiredDisposedCode>
                    <value>D</value>
                </transactionAcquiredDisposedCode>
            </transactionAmounts>
            <exerciseDate>
                <footnoteId id="F1"/>
            </exerciseDate>
            <expirationDate>
                <footnoteId id="F1"/>
            </expirationDate>
            <underlyingSecurity>
                <underlyingSecurityTitle>
                    <value>Class A Common Stock</value>
                </underlyingSecurityTitle>
                <underlyingSecurityShares>
                    <value>25136</value>
                </underlyingSecurityShares>
            </underlyingSecurity>
            <postTransactionAmounts>
                <sharesOwnedFollowingTransaction>
                    <value>25000</value>
                </sharesOwnedFollowingTransaction>
            </postTransactionAmounts>
            <ownershipNature>
                <directOrIndirectOwnership>
                    <value>D</value>
                </directOrIndirectOwnership>
            </ownershipNature>
        </derivativeTransaction>
    </derivativeTable>

    <footnotes>
        <footnote id="F1">Pursuant to the terms of exchange agreements (the &quot;Exchange Agreement&quot;) between Malibu Boats, Inc. (the &quot;Issuer&quot;) and holders of limited liability company interests of Malibu Boats Holdings, LLC (the &quot;LLC Units&quot;), a holder of LLC Units has the right to exchange LLC Units for shares of the Issuer's Class A Common Stock on a one-for-one basis, subject to customary conversion rate adjustments for stock splits, stock dividends and reclassifications, or at the Issuer's option, other than in the event of a change in control, for a cash payment equal to the market value of the LLC Units.  The LLC Units have no expiration date.</footnote>
        <footnote id="F2">Prior to the closing of the public offering of Class A Common Stock by certain selling stockholders of the Issuer (the &quot;Offering&quot;) on May 27, 2015,  Black Canyon Direct Investment Fund L.P. (&quot;BC Fund&quot;), Canyon Value Realization Fund, L.P. (&quot;Canyon Fund&quot;), Loudon Partners, LLC (&quot;Loudon&quot;), and the reporting person exchanged LLC Units for the equivalent number of shares of the Issuer's Class A Common Stock in accordance with the terms of the Exchange Agreement.</footnote>
        <footnote id="F3">The amount shown represents the beneficial ownership of Class A Common Stock, Class B Common Stock and LLC Units, as applicable, owned directly by BC Fund.</footnote>
        <footnote id="F4">The amount shown represents the beneficial ownership of Class A Common Stock, Class B Common Stock and LLC Units, as applicable, owned directly by Canyon Fund.</footnote>
        <footnote id="F5">The amount shown represents the beneficial ownership of Class A Common Stock, Class B Common Stock and LLC Units, as applicable, owned directly by Loudon.</footnote>
        <footnote id="F6">Includes 11,697 stock units granted to the reporting person.  The stock units are fully vested and payable in an equivalent number of shares of the Issuer's Class A Common Stock upon or as soon as practicable, and in all events within 30 days, following the first to occur of (A) the date of the reporting person's separation from service (as defined in the Issuer's Directors' Compensation Policy) or (B) the occurrence of a change in control under the Issuer's Long-Term Incentive Plan.</footnote>
        <footnote id="F7">BC Fund, Canyon Fund, Loudon, BC-MB GP, Canyon Value Realization Master Fund. L.P. (&quot;Canyon Master Fund&quot;) and the reporting person sold shares of Class A Common Stock in the Offering at a price of $19.05 per share, after deducting underwriting discounts and commissions of $0.95 per share.</footnote>
        <footnote id="F8">The amount shown represents the beneficial ownership of Class A Common Stock owned directly by BC-MB GP.</footnote>
        <footnote id="F9">The amount shown represents the beneficial ownership of Class A Common Stock owned directly by Canyon Master Fund.</footnote>
        <footnote id="F10">In accordance with Section 5.C. of the Issuer's Certificate of Incorporation, any share of Class B Common Stock of the Issuer held by a holder of LLC Units is automatically transferred to the Issuer and retired by the Issuer upon such holder ceasing to own any LLC Units.</footnote>
    </footnotes>

    <remarks>See Exhibit 99 for the relationship among the reporting person and the entities described above.

Exhibit List:
Exhibit 99</remarks>

    <ownerSignature>
        <signatureName>MICHAEL K. HOOKS, /s/ Wayne Wilson as attorney-in-fact</signatureName>
        <signatureDate>2015-05-27</signatureDate>
    </ownerSignature>
</ownershipDocument>
