<SEC-DOCUMENT>0001209191-21-048265.txt : 20210726
<SEC-HEADER>0001209191-21-048265.hdr.sgml : 20210726
<ACCEPTANCE-DATETIME>20210726213805
ACCESSION NUMBER:		0001209191-21-048265
CONFORMED SUBMISSION TYPE:	4
PUBLIC DOCUMENT COUNT:		1
CONFORMED PERIOD OF REPORT:	20210726
FILED AS OF DATE:		20210726
DATE AS OF CHANGE:		20210726

REPORTING-OWNER:	

	OWNER DATA:	
		COMPANY CONFORMED NAME:			SORENSON CAPITAL PARTNERS III, LP
		CENTRAL INDEX KEY:			0001593258
		STATE OF INCORPORATION:			DE
		FISCAL YEAR END:			1231

	FILING VALUES:
		FORM TYPE:		4
		SEC ACT:		1934 Act
		SEC FILE NUMBER:	001-40601
		FILM NUMBER:		211115738

	BUSINESS ADDRESS:	
		STREET 1:		3400 N. ASHTON BOULEVARD, SUITE 400
		CITY:			LEHI
		STATE:			UT
		ZIP:			84043
		BUSINESS PHONE:		801-407-8400

	MAIL ADDRESS:	
		STREET 1:		3400 N. ASHTON BOULEVARD, SUITE 400
		CITY:			LEHI
		STATE:			UT
		ZIP:			84043

REPORTING-OWNER:	

	OWNER DATA:	
		COMPANY CONFORMED NAME:			SORENSON CAPITAL PARTNERS III-A, LP
		CENTRAL INDEX KEY:			0001593259
		STATE OF INCORPORATION:			DE
		FISCAL YEAR END:			1231

	FILING VALUES:
		FORM TYPE:		4
		SEC ACT:		1934 Act
		SEC FILE NUMBER:	001-40601
		FILM NUMBER:		211115737

	BUSINESS ADDRESS:	
		STREET 1:		3400 N. ASHTON BOULEVARD, SUITE 400
		CITY:			LEHI
		STATE:			UT
		ZIP:			84043
		BUSINESS PHONE:		801-407-8400

	MAIL ADDRESS:	
		STREET 1:		3400 N. ASHTON BOULEVARD, SUITE 400
		CITY:			LEHI
		STATE:			UT
		ZIP:			84043

REPORTING-OWNER:	

	OWNER DATA:	
		COMPANY CONFORMED NAME:			SORENSON CAPITAL PARTNERS III-B, LP
		CENTRAL INDEX KEY:			0001593261
		STATE OF INCORPORATION:			DE
		FISCAL YEAR END:			1231

	FILING VALUES:
		FORM TYPE:		4
		SEC ACT:		1934 Act
		SEC FILE NUMBER:	001-40601
		FILM NUMBER:		211115736

	BUSINESS ADDRESS:	
		STREET 1:		3400 N. ASHTON BOULEVARD, SUITE 400
		CITY:			LEHI
		STATE:			UT
		ZIP:			84043
		BUSINESS PHONE:		801-407-8400

	MAIL ADDRESS:	
		STREET 1:		3400 N. ASHTON BOULEVARD, SUITE 400
		CITY:			LEHI
		STATE:			UT
		ZIP:			84043

ISSUER:		

	COMPANY DATA:	
		COMPANY CONFORMED NAME:			Couchbase, Inc.
		CENTRAL INDEX KEY:			0001845022
		STANDARD INDUSTRIAL CLASSIFICATION:	SERVICES-PREPACKAGED SOFTWARE [7372]
		IRS NUMBER:				263576987
		STATE OF INCORPORATION:			DE
		FISCAL YEAR END:			0131

	BUSINESS ADDRESS:	
		STREET 1:		3250 OLCOTT STREET
		CITY:			SANTA CLARA
		STATE:			CA
		ZIP:			95054
		BUSINESS PHONE:		6504177500

	MAIL ADDRESS:	
		STREET 1:		3250 OLCOTT STREET
		CITY:			SANTA CLARA
		STATE:			CA
		ZIP:			95054
</SEC-HEADER>
<DOCUMENT>
<TYPE>4
<SEQUENCE>1
<FILENAME>doc4.xml
<DESCRIPTION>FORM 4 SUBMISSION
<TEXT>
<XML>
<?xml version="1.0"?>
<ownershipDocument>

    <schemaVersion>X0306</schemaVersion>

    <documentType>4</documentType>

    <periodOfReport>2021-07-26</periodOfReport>

    <notSubjectToSection16>1</notSubjectToSection16>

    <issuer>
        <issuerCik>0001845022</issuerCik>
        <issuerName>Couchbase, Inc.</issuerName>
        <issuerTradingSymbol>BASE</issuerTradingSymbol>
    </issuer>

    <reportingOwner>
        <reportingOwnerId>
            <rptOwnerCik>0001593258</rptOwnerCik>
            <rptOwnerName>SORENSON CAPITAL PARTNERS III, LP</rptOwnerName>
        </reportingOwnerId>
        <reportingOwnerAddress>
            <rptOwnerStreet1>3400 ASHTON BOULEVARD, #400</rptOwnerStreet1>
            <rptOwnerStreet2></rptOwnerStreet2>
            <rptOwnerCity>LEHI</rptOwnerCity>
            <rptOwnerState>UT</rptOwnerState>
            <rptOwnerZipCode>84043</rptOwnerZipCode>
            <rptOwnerStateDescription></rptOwnerStateDescription>
        </reportingOwnerAddress>
        <reportingOwnerRelationship>
            <isDirector>0</isDirector>
            <isOfficer>0</isOfficer>
            <isTenPercentOwner>1</isTenPercentOwner>
            <isOther>0</isOther>
        </reportingOwnerRelationship>
    </reportingOwner>

    <reportingOwner>
        <reportingOwnerId>
            <rptOwnerCik>0001593259</rptOwnerCik>
            <rptOwnerName>SORENSON CAPITAL PARTNERS III-A, LP</rptOwnerName>
        </reportingOwnerId>
        <reportingOwnerAddress>
            <rptOwnerStreet1>3400 ASHTON BOULEVARD, #400</rptOwnerStreet1>
            <rptOwnerStreet2></rptOwnerStreet2>
            <rptOwnerCity>LEHI</rptOwnerCity>
            <rptOwnerState>UT</rptOwnerState>
            <rptOwnerZipCode>84043</rptOwnerZipCode>
            <rptOwnerStateDescription></rptOwnerStateDescription>
        </reportingOwnerAddress>
        <reportingOwnerRelationship>
            <isDirector>0</isDirector>
            <isOfficer>0</isOfficer>
            <isTenPercentOwner>1</isTenPercentOwner>
            <isOther>0</isOther>
        </reportingOwnerRelationship>
    </reportingOwner>

    <reportingOwner>
        <reportingOwnerId>
            <rptOwnerCik>0001593261</rptOwnerCik>
            <rptOwnerName>SORENSON CAPITAL PARTNERS III-B, LP</rptOwnerName>
        </reportingOwnerId>
        <reportingOwnerAddress>
            <rptOwnerStreet1>3400 ASHTON BOULEVARD, #400</rptOwnerStreet1>
            <rptOwnerStreet2></rptOwnerStreet2>
            <rptOwnerCity>LEHI</rptOwnerCity>
            <rptOwnerState>UT</rptOwnerState>
            <rptOwnerZipCode>84043</rptOwnerZipCode>
            <rptOwnerStateDescription></rptOwnerStateDescription>
        </reportingOwnerAddress>
        <reportingOwnerRelationship>
            <isDirector>0</isDirector>
            <isOfficer>0</isOfficer>
            <isTenPercentOwner>1</isTenPercentOwner>
            <isOther>0</isOther>
        </reportingOwnerRelationship>
    </reportingOwner>

    <nonDerivativeTable>
        <nonDerivativeTransaction>
            <securityTitle>
                <value>Common Stock</value>
            </securityTitle>
            <transactionDate>
                <value>2021-07-26</value>
            </transactionDate>
            <deemedExecutionDate></deemedExecutionDate>
            <transactionCoding>
                <transactionFormType>4</transactionFormType>
                <transactionCode>C</transactionCode>
                <equitySwapInvolved>0</equitySwapInvolved>
            </transactionCoding>
            <transactionTimeliness>
                <value></value>
            </transactionTimeliness>
            <transactionAmounts>
                <transactionShares>
                    <value>3248392</value>
                </transactionShares>
                <transactionPricePerShare>
                    <footnoteId id="F1"/>
                </transactionPricePerShare>
                <transactionAcquiredDisposedCode>
                    <value>A</value>
                </transactionAcquiredDisposedCode>
            </transactionAmounts>
            <postTransactionAmounts>
                <sharesOwnedFollowingTransaction>
                    <value>3406128</value>
                </sharesOwnedFollowingTransaction>
            </postTransactionAmounts>
            <ownershipNature>
                <directOrIndirectOwnership>
                    <value>I</value>
                </directOrIndirectOwnership>
                <natureOfOwnership>
                    <value>By: SCP Couchbase Acquisition, L.L.C.</value>
                    <footnoteId id="F2"/>
                    <footnoteId id="F3"/>
                </natureOfOwnership>
            </ownershipNature>
        </nonDerivativeTransaction>
    </nonDerivativeTable>

    <derivativeTable>
        <derivativeTransaction>
            <securityTitle>
                <value>Series F Preferred Stock</value>
            </securityTitle>
            <conversionOrExercisePrice>
                <footnoteId id="F1"/>
            </conversionOrExercisePrice>
            <transactionDate>
                <value>2021-07-26</value>
            </transactionDate>
            <deemedExecutionDate></deemedExecutionDate>
            <transactionCoding>
                <transactionFormType>4</transactionFormType>
                <transactionCode>C</transactionCode>
                <equitySwapInvolved>0</equitySwapInvolved>
            </transactionCoding>
            <transactionTimeliness>
                <value></value>
            </transactionTimeliness>
            <transactionAmounts>
                <transactionShares>
                    <value>2156007</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>Common Stock</value>
                </underlyingSecurityTitle>
                <underlyingSecurityShares>
                    <value>2156007</value>
                </underlyingSecurityShares>
            </underlyingSecurity>
            <postTransactionAmounts>
                <sharesOwnedFollowingTransaction>
                    <value>0</value>
                </sharesOwnedFollowingTransaction>
            </postTransactionAmounts>
            <ownershipNature>
                <directOrIndirectOwnership>
                    <value>I</value>
                </directOrIndirectOwnership>
                <natureOfOwnership>
                    <value>By: SCP Couchbase Acquisition, L.L.C.</value>
                    <footnoteId id="F2"/>
                    <footnoteId id="F3"/>
                </natureOfOwnership>
            </ownershipNature>
        </derivativeTransaction>
        <derivativeTransaction>
            <securityTitle>
                <value>Series G Preferred Stock</value>
            </securityTitle>
            <conversionOrExercisePrice>
                <footnoteId id="F1"/>
            </conversionOrExercisePrice>
            <transactionDate>
                <value>2021-07-26</value>
            </transactionDate>
            <deemedExecutionDate></deemedExecutionDate>
            <transactionCoding>
                <transactionFormType>4</transactionFormType>
                <transactionCode>C</transactionCode>
                <equitySwapInvolved>0</equitySwapInvolved>
            </transactionCoding>
            <transactionTimeliness>
                <value></value>
            </transactionTimeliness>
            <transactionAmounts>
                <transactionShares>
                    <value>1024048</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>Common Stock</value>
                </underlyingSecurityTitle>
                <underlyingSecurityShares>
                    <value>1092385</value>
                </underlyingSecurityShares>
            </underlyingSecurity>
            <postTransactionAmounts>
                <sharesOwnedFollowingTransaction>
                    <value>0</value>
                </sharesOwnedFollowingTransaction>
            </postTransactionAmounts>
            <ownershipNature>
                <directOrIndirectOwnership>
                    <value>I</value>
                </directOrIndirectOwnership>
                <natureOfOwnership>
                    <value>By: SCP Couchbase Acquisition, L.L.C.</value>
                    <footnoteId id="F2"/>
                    <footnoteId id="F3"/>
                </natureOfOwnership>
            </ownershipNature>
        </derivativeTransaction>
    </derivativeTable>

    <footnotes>
        <footnote id="F1">Immediately prior to the completion of the Issuer's initial public offering, each share of Series F Preferred Stock is convertible into shares of the Issuer's Common Stock, par value $0.00001 per share, on a one-for-one basis and has no expiration date.  Immediately prior to the completion of the Issuer's initial public offering, each share of Series G Preferred Stock is convertible into shares of the Issuer's Common Stock, par value $0.00001 per share, on a 1.06673317089756-for-one basis and has no expiration date.</footnote>
        <footnote id="F2">Sorenson Capital Partners III, LP (&quot;SCP III&quot;), Sorenson Capital Partners III-A, LP (&quot;SCP III-A&quot;), Sorenson Capital Partners III-B, LP (&quot;SCP III-B&quot;) and Sorensen Capital Investment Partner III, LP (&quot;SCIP III&quot;) are the members of SCP Couchbase Acquisition L.L.C.  Sorenson Capital Associates III, LP is the general partner of each of SCP III, SCP III-A and SCP III-B. West Rim Capital Advisors, LP is the general partner of SCIP III. West Rim Capital Advisors, LLC (&quot;West Rim Capital&quot;) is the general partner of each of Sorenson Capital Associates III, LP and West Rim Capital Advisors, LP.  Rob Rueckert is a member of the Issuer's board of directors and the president of SCP Couchbase Acquisition, L.L.C. Each of Mark Ludwig, Ron Mika, Rob Rueckert and Luke Sorenson are partners of West Rim Capital and therefore may be deemed to have shared voting and dispositive power with respect to the shares held by SCP Couchbase Acquisition L.L.C.</footnote>
        <footnote id="F3">(continuation of FN 2): Each of the foregoing entities and individuals disclaim beneficial ownership of such shares except to the extent of their pecuniary interest therein.  The address for each of the Sorenson entities listed above is 3400 Ashton Boulevard #400, Lehi, Utah 84043.</footnote>
    </footnotes>

    <remarks></remarks>

    <ownerSignature>
        <signatureName>Sorenson Capital Partners III, LP, /s/ Rob Rueckert, Authorized Signatory</signatureName>
        <signatureDate>2021-07-26</signatureDate>
    </ownerSignature>

    <ownerSignature>
        <signatureName>Sorenson Capital Partners III-A, LP, /s/ Rob Rueckert, Authorized Signatory</signatureName>
        <signatureDate>2021-07-26</signatureDate>
    </ownerSignature>

    <ownerSignature>
        <signatureName>Sorenson Capital Partners III-B, LP, /s/ Rob Rueckert, Authorized Signatory</signatureName>
        <signatureDate>2021-07-26</signatureDate>
    </ownerSignature>
</ownershipDocument>
</XML>
</TEXT>
</DOCUMENT>
</SEC-DOCUMENT>
