<?xml version="1.0"?>
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    <periodOfReport>2023-07-28</periodOfReport>

    <notSubjectToSection16>1</notSubjectToSection16>

    <issuer>
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        <issuerName>AEROJET ROCKETDYNE HOLDINGS, INC.</issuerName>
        <issuerTradingSymbol>AJRD</issuerTradingSymbol>
    </issuer>

    <reportingOwner>
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            <rptOwnerCik>0001635474</rptOwnerCik>
            <rptOwnerName>Drake Eileen P.</rptOwnerName>
        </reportingOwnerId>
        <reportingOwnerAddress>
            <rptOwnerStreet1>222 N. PACIFIC COAST HIGHWAY,  SUITE 500</rptOwnerStreet1>
            <rptOwnerStreet2></rptOwnerStreet2>
            <rptOwnerCity>EL SEGUNDO</rptOwnerCity>
            <rptOwnerState>CA</rptOwnerState>
            <rptOwnerZipCode>90245</rptOwnerZipCode>
            <rptOwnerStateDescription></rptOwnerStateDescription>
        </reportingOwnerAddress>
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            <isDirector>1</isDirector>
            <isOfficer>1</isOfficer>
            <isTenPercentOwner>0</isTenPercentOwner>
            <isOther>0</isOther>
            <officerTitle>CEO and President</officerTitle>
        </reportingOwnerRelationship>
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                <directOrIndirectOwnership>
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                <natureOfOwnership>
                    <value>EPD 2018 Trust Dated August 7, 2018</value>
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                </underlyingSecurityTitle>
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            <transactionTimeliness>
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            <transactionTimeliness>
                <value></value>
            </transactionTimeliness>
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                <transactionShares>
                    <value>21940</value>
                </transactionShares>
                <transactionPricePerShare>
                    <value>58.00</value>
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            <underlyingSecurity>
                <underlyingSecurityTitle>
                    <value>Common Stock</value>
                </underlyingSecurityTitle>
                <underlyingSecurityShares>
                    <value>21940</value>
                </underlyingSecurityShares>
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                <directOrIndirectOwnership>
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                </directOrIndirectOwnership>
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        </derivativeTransaction>
        <derivativeTransaction>
            <securityTitle>
                <value>Stock Appreciation Right</value>
            </securityTitle>
            <conversionOrExercisePrice>
                <value>17.35</value>
            </conversionOrExercisePrice>
            <transactionDate>
                <value>2023-07-28</value>
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            <deemedExecutionDate></deemedExecutionDate>
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            <transactionTimeliness>
                <value></value>
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                <transactionPricePerShare>
                    <value>40.65</value>
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                <transactionAcquiredDisposedCode>
                    <value>D</value>
                </transactionAcquiredDisposedCode>
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            <exerciseDate>
                <value>2020-05-01</value>
            </exerciseDate>
            <expirationDate>
                <value>2020-05-01</value>
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                <underlyingSecurityTitle>
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                    <value>D</value>
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        <derivativeTransaction>
            <securityTitle>
                <value>Stock Appreciation Right</value>
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                <value>22.25</value>
            </conversionOrExercisePrice>
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                <value></value>
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                    <value>46768</value>
                </transactionShares>
                <transactionPricePerShare>
                    <value>35.75</value>
                    <footnoteId id="F8"/>
                </transactionPricePerShare>
                <transactionAcquiredDisposedCode>
                    <value>D</value>
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                <value>2021-02-27</value>
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            <expirationDate>
                <value>2021-02-27</value>
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                <underlyingSecurityTitle>
                    <value>Common Stock</value>
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                    <value>0</value>
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                    <value>D</value>
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                <value>Stock Appreciation Right</value>
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                <value>32.25</value>
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                <value></value>
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                <transactionShares>
                    <value>58420</value>
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                    <value>25.75</value>
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                    <value>D</value>
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                <value>2022-02-28</value>
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                <underlyingSecurityTitle>
                    <value>Common Stock</value>
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                    <value>58420</value>
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                    <value>0</value>
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    <footnotes>
        <footnote id="F1">Under the terms of the Agreement and Plan of Merger, dated as of December 17, 2022 (the &quot;Merger Agreement&quot;), by and among L3Harris Technologies, Inc., Aquila Merger Sub Inc. and Aerojet Rocketdyne Holdings, Inc. (the &quot;Issuer&quot;), Aquila Merger Sub Inc. merged with and into the Issuer, with the Issuer surviving and becoming a wholly-owned subsidiary of L3Harris Technologies, Inc. (the &quot;Merger&quot;). At the effective time of the Merger, each issued and outstanding share of the Issuer's common stock was automatically canceled and converted into the right to receive $58.00 in cash per share, less applicable tax withholding (the &quot;Merger Consideration&quot;).</footnote>
        <footnote id="F2">The number of shares reported includes previously-reported shares of restricted stock, which vested in full upon consummation of the Merger.</footnote>
        <footnote id="F3">Each restricted stock unit (&quot;RSU&quot;) represents a contingent right to receive one share of Issuer common stock.</footnote>
        <footnote id="F4">Pursuant to the Merger Agreement, at the effective time of the Merger these RSUs were canceled and converted into the right to receive the Merger Consideration.</footnote>
        <footnote id="F5">Reflects an initial grant of 19,691 RSUs originally scheduled to vest in three equal annual installments beginning on February 28, 2023.</footnote>
        <footnote id="F6">These RSUs were originally scheduled to vest 25% on October 27, 2023, 25% on October 27, 2024 and 50% on October 27, 2025.</footnote>
        <footnote id="F7">These RSUs were originally scheduled to vest in three equal annual installments beginning on February 28, 2024.</footnote>
        <footnote id="F8">This award was canceled in the Merger in exchange for the right to receive, for each underlying share, a cash payment equal to the difference between the Merger Consideration and the exercise price of the award, less applicable tax withholding.</footnote>
    </footnotes>

    <remarks></remarks>

    <ownerSignature>
        <signatureName>/s/ David A. Fox, attorney-in-fact</signatureName>
        <signatureDate>2023-07-31</signatureDate>
    </ownerSignature>
</ownershipDocument>
