<SEC-DOCUMENT>0001209191-21-059179.txt : 20211004
<SEC-HEADER>0001209191-21-059179.hdr.sgml : 20211004
<ACCEPTANCE-DATETIME>20211004203840
ACCESSION NUMBER:		0001209191-21-059179
CONFORMED SUBMISSION TYPE:	4
PUBLIC DOCUMENT COUNT:		1
CONFORMED PERIOD OF REPORT:	20210930
FILED AS OF DATE:		20211004
DATE AS OF CHANGE:		20211004

REPORTING-OWNER:	

	OWNER DATA:	
		COMPANY CONFORMED NAME:			Monroe Christopher
		CENTRAL INDEX KEY:			0001885206

	FILING VALUES:
		FORM TYPE:		4
		SEC ACT:		1934 Act
		SEC FILE NUMBER:	001-39694
		FILM NUMBER:		211304867

	MAIL ADDRESS:	
		STREET 1:		C/O IONQ, INC.
		STREET 2:		4505 CAMPUS DRIVE
		CITY:			COLLEGE PARK
		STATE:			MD
		ZIP:			20740

ISSUER:		

	COMPANY DATA:	
		COMPANY CONFORMED NAME:			IonQ, Inc.
		CENTRAL INDEX KEY:			0001824920
		STANDARD INDUSTRIAL CLASSIFICATION:	SERVICES-COMPUTER INTEGRATED SYSTEMS DESIGN [7373]
		IRS NUMBER:				852992192
		STATE OF INCORPORATION:			DE
		FISCAL YEAR END:			1231

	BUSINESS ADDRESS:	
		STREET 1:		4505 CAMPUS DRIVE
		CITY:			COLLEGE PARK
		STATE:			MD
		ZIP:			20740
		BUSINESS PHONE:		(301) 298-7997

	MAIL ADDRESS:	
		STREET 1:		4505 CAMPUS DRIVE
		CITY:			COLLEGE PARK
		STATE:			MD
		ZIP:			20740

	FORMER COMPANY:	
		FORMER CONFORMED NAME:	dMY Technology Group, Inc. III
		DATE OF NAME CHANGE:	20200915
</SEC-HEADER>
<DOCUMENT>
<TYPE>4
<SEQUENCE>1
<FILENAME>doc4.xml
<DESCRIPTION>FORM 4 SUBMISSION
<TEXT>
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<ownershipDocument>

    <schemaVersion>X0306</schemaVersion>

    <documentType>4</documentType>

    <periodOfReport>2021-09-30</periodOfReport>

    <notSubjectToSection16>0</notSubjectToSection16>

    <issuer>
        <issuerCik>0001824920</issuerCik>
        <issuerName>IonQ, Inc.</issuerName>
        <issuerTradingSymbol>IONQ</issuerTradingSymbol>
    </issuer>

    <reportingOwner>
        <reportingOwnerId>
            <rptOwnerCik>0001885206</rptOwnerCik>
            <rptOwnerName>Monroe Christopher</rptOwnerName>
        </reportingOwnerId>
        <reportingOwnerAddress>
            <rptOwnerStreet1>C/O IONQ, INC.</rptOwnerStreet1>
            <rptOwnerStreet2>4505 CAMPUS DRIVE</rptOwnerStreet2>
            <rptOwnerCity>COLLEGE PARK</rptOwnerCity>
            <rptOwnerState>MD</rptOwnerState>
            <rptOwnerZipCode>20740</rptOwnerZipCode>
            <rptOwnerStateDescription></rptOwnerStateDescription>
        </reportingOwnerAddress>
        <reportingOwnerRelationship>
            <isDirector>0</isDirector>
            <isOfficer>1</isOfficer>
            <isTenPercentOwner>0</isTenPercentOwner>
            <isOther>0</isOther>
            <officerTitle>Chief Scientist</officerTitle>
        </reportingOwnerRelationship>
    </reportingOwner>

    <nonDerivativeTable>
        <nonDerivativeTransaction>
            <securityTitle>
                <value>Common Stock</value>
            </securityTitle>
            <transactionDate>
                <value>2021-09-30</value>
            </transactionDate>
            <deemedExecutionDate></deemedExecutionDate>
            <transactionCoding>
                <transactionFormType>4</transactionFormType>
                <transactionCode>A</transactionCode>
                <equitySwapInvolved>0</equitySwapInvolved>
            </transactionCoding>
            <transactionTimeliness>
                <value></value>
            </transactionTimeliness>
            <transactionAmounts>
                <transactionShares>
                    <value>6534138</value>
                    <footnoteId id="F1"/>
                </transactionShares>
                <transactionPricePerShare>
                    <value>0.00</value>
                </transactionPricePerShare>
                <transactionAcquiredDisposedCode>
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            </transactionAmounts>
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                <sharesOwnedFollowingTransaction>
                    <value>6534138</value>
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            <ownershipNature>
                <directOrIndirectOwnership>
                    <value>D</value>
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    <derivativeTable>
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            <securityTitle>
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            <transactionDate>
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                </transactionShares>
                <transactionPricePerShare>
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                </transactionPricePerShare>
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            <expirationDate>
                <value>2029-01-24</value>
            </expirationDate>
            <underlyingSecurity>
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                </underlyingSecurityTitle>
                <underlyingSecurityShares>
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                </underlyingSecurityShares>
            </underlyingSecurity>
            <postTransactionAmounts>
                <sharesOwnedFollowingTransaction>
                    <value>246684</value>
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        <derivativeTransaction>
            <securityTitle>
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            <transactionDate>
                <value>2021-09-30</value>
            </transactionDate>
            <deemedExecutionDate></deemedExecutionDate>
            <transactionCoding>
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                <transactionCode>A</transactionCode>
                <equitySwapInvolved>0</equitySwapInvolved>
            </transactionCoding>
            <transactionTimeliness>
                <value></value>
            </transactionTimeliness>
            <transactionAmounts>
                <transactionShares>
                    <value>1214535</value>
                </transactionShares>
                <transactionPricePerShare>
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                <transactionAcquiredDisposedCode>
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                <underlyingSecurityShares>
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                <sharesOwnedFollowingTransaction>
                    <value>1214535</value>
                </sharesOwnedFollowingTransaction>
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                <directOrIndirectOwnership>
                    <value>D</value>
                </directOrIndirectOwnership>
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        </derivativeTransaction>
        <derivativeTransaction>
            <securityTitle>
                <value>Employee Stock Option (right to buy)</value>
            </securityTitle>
            <conversionOrExercisePrice>
                <value>2.40</value>
            </conversionOrExercisePrice>
            <transactionDate>
                <value>2021-09-30</value>
            </transactionDate>
            <deemedExecutionDate></deemedExecutionDate>
            <transactionCoding>
                <transactionFormType>4</transactionFormType>
                <transactionCode>A</transactionCode>
                <equitySwapInvolved>0</equitySwapInvolved>
            </transactionCoding>
            <transactionTimeliness>
                <value></value>
            </transactionTimeliness>
            <transactionAmounts>
                <transactionShares>
                    <value>404845</value>
                </transactionShares>
                <transactionPricePerShare>
                    <value>0.00</value>
                </transactionPricePerShare>
                <transactionAcquiredDisposedCode>
                    <value>A</value>
                </transactionAcquiredDisposedCode>
            </transactionAmounts>
            <exerciseDate>
                <footnoteId id="F4"/>
            </exerciseDate>
            <expirationDate>
                <value>2031-03-03</value>
            </expirationDate>
            <underlyingSecurity>
                <underlyingSecurityTitle>
                    <value>Common Stock</value>
                </underlyingSecurityTitle>
                <underlyingSecurityShares>
                    <value>404845</value>
                </underlyingSecurityShares>
            </underlyingSecurity>
            <postTransactionAmounts>
                <sharesOwnedFollowingTransaction>
                    <value>404845</value>
                </sharesOwnedFollowingTransaction>
            </postTransactionAmounts>
            <ownershipNature>
                <directOrIndirectOwnership>
                    <value>D</value>
                </directOrIndirectOwnership>
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        </derivativeTransaction>
    </derivativeTable>

    <footnotes>
        <footnote id="F1">Received on September 30, 2021 pursuant to that certain Agreement and Plan of Merger (&quot;Merger&quot;), dated as of March 7, 2021, by and among dMY Technology Group, Inc. III, a Delaware corporation (&quot;dMY&quot;), Ion Trap Acquisition Inc., a Delaware corporation and a wholly-owned subsidiary of dMY, and IonQ, Inc., a Delaware corporation (&quot;Former IonQ&quot;), in exchange for Former IonQ shares.</footnote>
        <footnote id="F2">The shares underlying the option vested or shall vest 1/60th on the last day of each month commencing on September 30, 2018, subject to the Reporting Person continuously providing service to the Issuer.</footnote>
        <footnote id="F3">The shares underlying the option vested or shall vest 1/60th on the last day of each month commencing on December 31, 2020, subject to the Reporting Person continuously providing service to the Issuer.</footnote>
        <footnote id="F4">The shares underlying the option vested or shall vest 1/60th on the last day of each month commencing on April 30, 2021, subject to the Reporting Person continuously providing service to the Issuer.</footnote>
    </footnotes>

    <remarks></remarks>

    <ownerSignature>
        <signatureName>/s/ Jason Minio, Attorney-in-Fact</signatureName>
        <signatureDate>2021-10-04</signatureDate>
    </ownerSignature>
</ownershipDocument>
</XML>
</TEXT>
</DOCUMENT>
</SEC-DOCUMENT>
