<SEC-DOCUMENT>0001484778-21-000048.txt : 20210802
<SEC-HEADER>0001484778-21-000048.hdr.sgml : 20210802
<ACCEPTANCE-DATETIME>20210802191852
ACCESSION NUMBER:		0001484778-21-000048
CONFORMED SUBMISSION TYPE:	4
PUBLIC DOCUMENT COUNT:		1
CONFORMED PERIOD OF REPORT:	20210802
FILED AS OF DATE:		20210802
DATE AS OF CHANGE:		20210802

REPORTING-OWNER:	

	OWNER DATA:	
		COMPANY CONFORMED NAME:			HALEY TIMOTHY M
		CENTRAL INDEX KEY:			0001201583

	FILING VALUES:
		FORM TYPE:		4
		SEC ACT:		1934 Act
		SEC FILE NUMBER:	001-40249
		FILM NUMBER:		211137370

	MAIL ADDRESS:	
		STREET 1:		3000 SAND HILL ROAD, 2-290
		CITY:			MENLO PARK
		STATE:			CA
		ZIP:			94025

ISSUER:		

	COMPANY DATA:	
		COMPANY CONFORMED NAME:			ThredUp Inc.
		CENTRAL INDEX KEY:			0001484778
		STANDARD INDUSTRIAL CLASSIFICATION:	RETAIL-CATALOG & MAIL-ORDER HOUSES [5961]
		IRS NUMBER:				264009181
		STATE OF INCORPORATION:			DE
		FISCAL YEAR END:			1231

	BUSINESS ADDRESS:	
		STREET 1:		969 BROADWAY
		STREET 2:		SUITE 200
		CITY:			OAKLAND
		STATE:			CA
		ZIP:			94607
		BUSINESS PHONE:		415-402-5202

	MAIL ADDRESS:	
		STREET 1:		969 BROADWAY
		STREET 2:		SUITE 200
		CITY:			OAKLAND
		STATE:			CA
		ZIP:			94607

	FORMER COMPANY:	
		FORMER CONFORMED NAME:	thredUP
		DATE OF NAME CHANGE:	20100222
</SEC-HEADER>
<DOCUMENT>
<TYPE>4
<SEQUENCE>1
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<DESCRIPTION>FORM 4
<TEXT>
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    <periodOfReport>2021-08-02</periodOfReport>

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    <issuer>
        <issuerCik>0001484778</issuerCik>
        <issuerName>ThredUp Inc.</issuerName>
        <issuerTradingSymbol>TDUP</issuerTradingSymbol>
    </issuer>

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            <rptOwnerCik>0001201583</rptOwnerCik>
            <rptOwnerName>HALEY TIMOTHY M</rptOwnerName>
        </reportingOwnerId>
        <reportingOwnerAddress>
            <rptOwnerStreet1>C/O THREDUP INC.</rptOwnerStreet1>
            <rptOwnerStreet2>969 BROADWAY, SUITE 200</rptOwnerStreet2>
            <rptOwnerCity>OAKLAND</rptOwnerCity>
            <rptOwnerState>CA</rptOwnerState>
            <rptOwnerZipCode>94607</rptOwnerZipCode>
            <rptOwnerStateDescription></rptOwnerStateDescription>
        </reportingOwnerAddress>
        <reportingOwnerRelationship>
            <isDirector>1</isDirector>
            <isOfficer>0</isOfficer>
            <isTenPercentOwner>0</isTenPercentOwner>
            <isOther>0</isOther>
            <officerTitle></officerTitle>
            <otherText></otherText>
        </reportingOwnerRelationship>
    </reportingOwner>

    <nonDerivativeTable>
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            <securityTitle>
                <value>Class A Common Stock</value>
            </securityTitle>
            <transactionDate>
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            <transactionCoding>
                <transactionFormType>4</transactionFormType>
                <transactionCode>C</transactionCode>
                <equitySwapInvolved>0</equitySwapInvolved>
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            <ownershipNature>
                <directOrIndirectOwnership>
                    <value>I</value>
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                <natureOfOwnership>
                    <value>By Redpoint Ventures IV, L.P.</value>
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                    <value>I</value>
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                    <value>By Redpoint Associates IV, LLC</value>
                    <footnoteId id="F2"/>
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        </nonDerivativeTransaction>
        <nonDerivativeTransaction>
            <securityTitle>
                <value>Class A Common Stock</value>
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                <transactionPricePerShare>
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                </transactionPricePerShare>
                <transactionAcquiredDisposedCode>
                    <value>D</value>
                </transactionAcquiredDisposedCode>
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                <sharesOwnedFollowingTransaction>
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            <ownershipNature>
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                    <value>By Redpoint Ventures IV, L.P.</value>
                    <footnoteId id="F2"/>
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        <nonDerivativeTransaction>
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                    <value>By Redpoint Associates IV, LLC</value>
                    <footnoteId id="F2"/>
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            </ownershipNature>
        </nonDerivativeTransaction>
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                <value>Class B Common Stock</value>
            </securityTitle>
            <conversionOrExercisePrice>
                <footnoteId id="F4"/>
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            <transactionDate>
                <value>2021-08-02</value>
            </transactionDate>
            <transactionCoding>
                <transactionFormType>4</transactionFormType>
                <transactionCode>C</transactionCode>
                <equitySwapInvolved>0</equitySwapInvolved>
                <footnoteId id="F1"/>
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            <transactionAmounts>
                <transactionShares>
                    <value>1043885</value>
                </transactionShares>
                <transactionPricePerShare>
                    <value>0</value>
                </transactionPricePerShare>
                <transactionAcquiredDisposedCode>
                    <value>D</value>
                </transactionAcquiredDisposedCode>
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            <exerciseDate>
                <footnoteId id="F4"/>
            </exerciseDate>
            <expirationDate>
                <footnoteId id="F4"/>
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            <underlyingSecurity>
                <underlyingSecurityTitle>
                    <value>Class A Common Stock</value>
                </underlyingSecurityTitle>
                <underlyingSecurityShares>
                    <value>1043885.0</value>
                </underlyingSecurityShares>
            </underlyingSecurity>
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                    <value>9394981</value>
                </sharesOwnedFollowingTransaction>
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                    <value>I</value>
                </directOrIndirectOwnership>
                <natureOfOwnership>
                    <value>By Redpoint Ventures IV, L.P</value>
                    <footnoteId id="F2"/>
                </natureOfOwnership>
            </ownershipNature>
        </derivativeTransaction>
        <derivativeTransaction>
            <securityTitle>
                <value>Class B Common Stock</value>
            </securityTitle>
            <conversionOrExercisePrice>
                <footnoteId id="F4"/>
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                </transactionPricePerShare>
                <transactionAcquiredDisposedCode>
                    <value>D</value>
                </transactionAcquiredDisposedCode>
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                <footnoteId id="F4"/>
            </exerciseDate>
            <expirationDate>
                <footnoteId id="F4"/>
            </expirationDate>
            <underlyingSecurity>
                <underlyingSecurityTitle>
                    <value>Class A Common Stock</value>
                </underlyingSecurityTitle>
                <underlyingSecurityShares>
                    <value>26766.0</value>
                </underlyingSecurityShares>
            </underlyingSecurity>
            <postTransactionAmounts>
                <sharesOwnedFollowingTransaction>
                    <value>240896</value>
                </sharesOwnedFollowingTransaction>
            </postTransactionAmounts>
            <ownershipNature>
                <directOrIndirectOwnership>
                    <value>I</value>
                </directOrIndirectOwnership>
                <natureOfOwnership>
                    <value>By Redpoint Associates IV, LLC</value>
                    <footnoteId id="F2"/>
                </natureOfOwnership>
            </ownershipNature>
        </derivativeTransaction>
    </derivativeTable>

    <footnotes>
        <footnote id="F1">Each share of Class B Common Stock was converted into one share of Class A Common Stock at the option of the holder in connection with the registered public offering of shares of the Issuer's Class A Common Stock, pursuant to a final prospectus dated July 28, 2021, which offering was consummated on August 2, 2021.</footnote>
        <footnote id="F2">Redpoint Ventures IV, LLC (&quot;RV IV LLC&quot;) is the sole general partner of Redpoint Ventures IV, L.P. (&quot;RV IV&quot;). RV IV LLC and Redpoint Associates IV, LLC (&quot;RA IV&quot;) are under common control. The Reporting Person is a manager of RV IV LLC and RA IV, and disclaims beneficial ownership of the securities held by RV IV and RA IV, except to the extent of his pecuniary interest therein.</footnote>
        <footnote id="F3">Pursuant to an underwriting agreement and in connection with the registered public offering of shares of the Issuer's Class A Common Stock, pursuant to a final prospectus dated July 28, 2021, which offering was consummated on August 2, 2021, RV IV sold 1,043,885 shares of Class A Common Stock and RA IV sold 26,766 shares of Class A Common Stock, each at a price per share of $23.1588 (after underwriting discounts and commissions).  RV IV and RA IV were selling stockholders in the registered public offering.</footnote>
        <footnote id="F4">Each share of Class B Common Stock is convertible into one share of Class A Common Stock at the option of the holder and upon the occurrence of other events set forth in the Issuer's Certificate of Incorporation.</footnote>
    </footnotes>

    <remarks></remarks>

    <ownerSignature>
        <signatureName>/s/ Alon Rotem, Attorney-in-Fact</signatureName>
        <signatureDate>2021-08-02</signatureDate>
    </ownerSignature>
</ownershipDocument>
</XML>
</TEXT>
</DOCUMENT>
</SEC-DOCUMENT>
