<SEC-DOCUMENT>0001209191-23-042110.txt : 20230712
<SEC-HEADER>0001209191-23-042110.hdr.sgml : 20230712
<ACCEPTANCE-DATETIME>20230712180620
ACCESSION NUMBER:		0001209191-23-042110
CONFORMED SUBMISSION TYPE:	4
PUBLIC DOCUMENT COUNT:		1
CONFORMED PERIOD OF REPORT:	20230710
FILED AS OF DATE:		20230712
DATE AS OF CHANGE:		20230712

REPORTING-OWNER:	

	OWNER DATA:	
		COMPANY CONFORMED NAME:			Doerfler Douglas
		CENTRAL INDEX KEY:			0001874482

	FILING VALUES:
		FORM TYPE:		4
		SEC ACT:		1934 Act
		SEC FILE NUMBER:	001-40674
		FILM NUMBER:		231085424

	MAIL ADDRESS:	
		STREET 1:		C/O MAXCYTE, INC.
		STREET 2:		22 FIRSTFIELD ROAD, SUITE 110
		CITY:			GAITHERSBURG
		STATE:			MD
		ZIP:			20878

ISSUER:		

	COMPANY DATA:	
		COMPANY CONFORMED NAME:			MAXCYTE, INC.
		CENTRAL INDEX KEY:			0001287098
		STANDARD INDUSTRIAL CLASSIFICATION:	SERVICES-COMMERCIAL PHYSICAL & BIOLOGICAL RESEARCH [8731]
		IRS NUMBER:				522210438
		STATE OF INCORPORATION:			DE
		FISCAL YEAR END:			1231

	BUSINESS ADDRESS:	
		STREET 1:		9713 KEY WEST AVENUE,
		STREET 2:		SUITE 400
		CITY:			ROCKVILLE
		STATE:			MD
		ZIP:			20850
		BUSINESS PHONE:		301-517-5556

	MAIL ADDRESS:	
		STREET 1:		9713 KEY WEST AVENUE,
		STREET 2:		SUITE 400
		CITY:			ROCKVILLE
		STATE:			MD
		ZIP:			20850

	FORMER COMPANY:	
		FORMER CONFORMED NAME:	MAXCYTE INC
		DATE OF NAME CHANGE:	20040415
</SEC-HEADER>
<DOCUMENT>
<TYPE>4
<SEQUENCE>1
<FILENAME>doc4.xml
<DESCRIPTION>FORM 4 SUBMISSION
<TEXT>
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        <issuerCik>0001287098</issuerCik>
        <issuerName>MAXCYTE, INC.</issuerName>
        <issuerTradingSymbol>MXCT</issuerTradingSymbol>
    </issuer>

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            <rptOwnerName>Doerfler Douglas</rptOwnerName>
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        <reportingOwnerAddress>
            <rptOwnerStreet1>C/O MAXCYTE, INC.</rptOwnerStreet1>
            <rptOwnerStreet2>9713 KEY WEST AVENUE, SUITE 400</rptOwnerStreet2>
            <rptOwnerCity>ROCKVILLE</rptOwnerCity>
            <rptOwnerState>MD</rptOwnerState>
            <rptOwnerZipCode>20850</rptOwnerZipCode>
            <rptOwnerStateDescription></rptOwnerStateDescription>
        </reportingOwnerAddress>
        <reportingOwnerRelationship>
            <isDirector>1</isDirector>
            <isOfficer>1</isOfficer>
            <isTenPercentOwner>0</isTenPercentOwner>
            <isOther>0</isOther>
            <officerTitle>President and CEO</officerTitle>
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        </nonDerivativeTransaction>
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    <derivativeTable>
        <derivativeTransaction>
            <securityTitle>
                <value>Employee Stock Option (right to buy)</value>
            </securityTitle>
            <conversionOrExercisePrice>
                <value>0.04</value>
            </conversionOrExercisePrice>
            <transactionDate>
                <value>2023-07-10</value>
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                <value></value>
            </transactionTimeliness>
            <transactionAmounts>
                <transactionShares>
                    <value>445</value>
                </transactionShares>
                <transactionPricePerShare>
                    <value>0.00</value>
                </transactionPricePerShare>
                <transactionAcquiredDisposedCode>
                    <value>D</value>
                </transactionAcquiredDisposedCode>
            </transactionAmounts>
            <exerciseDate>
                <footnoteId id="F5"/>
            </exerciseDate>
            <expirationDate>
                <value>2024-11-11</value>
            </expirationDate>
            <underlyingSecurity>
                <underlyingSecurityTitle>
                    <value>Common Stock</value>
                </underlyingSecurityTitle>
                <underlyingSecurityShares>
                    <value>445</value>
                </underlyingSecurityShares>
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                <equitySwapInvolved>0</equitySwapInvolved>
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                    <value>0.00</value>
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                <transactionAcquiredDisposedCode>
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                </transactionAcquiredDisposedCode>
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                <value>2024-11-11</value>
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                    <value>235080</value>
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    <footnotes>
        <footnote id="F1">The sales and option exercises reported in this Form 4 were effected pursuant to a Rule 10b5-1 trading plan adopted by the Reporting Person on November 18, 2022 relating solely to the sale of shares acquired from exercise of an option that expires on November 11, 2024.</footnote>
        <footnote id="F2">The price reported is a weighted average price. The shares were sold in multiple transactions at prices ranging from $5.005 to $5.02, inclusive. The Reporting Person undertakes to provide to the Issuer, any security holder of the Issuer, or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price within the range set forth in this footnote.</footnote>
        <footnote id="F3">The price reported is a weighted average price. The shares were sold in multiple transactions at prices ranging from $5.00 to $5.085, inclusive. The Reporting Person undertakes to provide to the Issuer, any security holder of the Issuer, or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price within the range set forth in this footnote.</footnote>
        <footnote id="F4">The price reported is a weighted average price. The shares were sold in multiple transactions at prices ranging from $5.00 to $5.12, inclusive. The Reporting Person undertakes to provide to the Issuer, any security holder of the Issuer, or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price within the range set forth in this footnote.</footnote>
        <footnote id="F5">This option is fully vested and exercisable.</footnote>
    </footnotes>

    <remarks></remarks>

    <ownerSignature>
        <signatureName>/s/ Brian F. Leaf, Attorney-in-Fact</signatureName>
        <signatureDate>2023-07-12</signatureDate>
    </ownerSignature>
</ownershipDocument>
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</TEXT>
</DOCUMENT>
</SEC-DOCUMENT>
