<SEC-DOCUMENT>0001104659-19-064691.txt : 20191115
<SEC-HEADER>0001104659-19-064691.hdr.sgml : 20191115
<ACCEPTANCE-DATETIME>20191115145202
ACCESSION NUMBER:		0001104659-19-064691
CONFORMED SUBMISSION TYPE:	4
PUBLIC DOCUMENT COUNT:		1
CONFORMED PERIOD OF REPORT:	20191104
FILED AS OF DATE:		20191115
DATE AS OF CHANGE:		20191115

REPORTING-OWNER:	

	OWNER DATA:	
		COMPANY CONFORMED NAME:			Topspin Fund L.P.
		CENTRAL INDEX KEY:			0001615782
		STATE OF INCORPORATION:			DE
		FISCAL YEAR END:			1231

	FILING VALUES:
		FORM TYPE:		4
		SEC ACT:		1934 Act
		SEC FILE NUMBER:	001-38997
		FILM NUMBER:		191224120

	BUSINESS ADDRESS:	
		STREET 1:		THREE EXPRESSWAY PLAZA
		CITY:			ROSLYN HEIGHTS
		STATE:			NY
		ZIP:			11577
		BUSINESS PHONE:		516-625-9400

	MAIL ADDRESS:	
		STREET 1:		THREE EXPRESSWAY PLAZA
		CITY:			ROSLYN HEIGHTS
		STATE:			NY
		ZIP:			11577

	FORMER NAME:	
		FORMER CONFORMED NAME:	Topspin Fund, L.P.
		DATE OF NAME CHANGE:	20140805

REPORTING-OWNER:	

	OWNER DATA:	
		COMPANY CONFORMED NAME:			Topspin Biotech Fund II, L.P.
		CENTRAL INDEX KEY:			0001745827
		STATE OF INCORPORATION:			DE
		FISCAL YEAR END:			1231

	FILING VALUES:
		FORM TYPE:		4
		SEC ACT:		1934 Act
		SEC FILE NUMBER:	001-38997
		FILM NUMBER:		191224121

	BUSINESS ADDRESS:	
		STREET 1:		3 EXPRESSWAY PLAZA
		CITY:			ROSLYN HEIGHTS
		STATE:			NY
		ZIP:			11577
		BUSINESS PHONE:		516-625-9400

	MAIL ADDRESS:	
		STREET 1:		3 EXPRESSWAY PLAZA
		CITY:			ROSLYN HEIGHTS
		STATE:			NY
		ZIP:			11577

REPORTING-OWNER:	

	OWNER DATA:	
		COMPANY CONFORMED NAME:			LG Management, LLC
		CENTRAL INDEX KEY:			0001685869
		STATE OF INCORPORATION:			DE
		FISCAL YEAR END:			1231

	FILING VALUES:
		FORM TYPE:		4
		SEC ACT:		1934 Act
		SEC FILE NUMBER:	001-38997
		FILM NUMBER:		191224122

	BUSINESS ADDRESS:	
		STREET 1:		THREE EXPRESSWAY PLAZA
		CITY:			ROSLYN HEIGHTS
		STATE:			NY
		ZIP:			11577
		BUSINESS PHONE:		5166259400

	MAIL ADDRESS:	
		STREET 1:		THREE EXPRESSWAY PLAZA
		CITY:			ROSLYN HEIGHTS
		STATE:			NY
		ZIP:			11577

REPORTING-OWNER:	

	OWNER DATA:	
		COMPANY CONFORMED NAME:			GUTHART LEO
		CENTRAL INDEX KEY:			0001200183

	FILING VALUES:
		FORM TYPE:		4
		SEC ACT:		1934 Act
		SEC FILE NUMBER:	001-38997
		FILM NUMBER:		191224123

	MAIL ADDRESS:	
		STREET 1:		C/O APTUR GROUP INC
		STREET 2:		475 W TERRA COTTA AVE STE E
		CITY:			CRYSTAL LAKE
		STATE:			IL
		ZIP:			60014

ISSUER:		

	COMPANY DATA:	
		COMPANY CONFORMED NAME:			RAPT Therapeutics, Inc.
		CENTRAL INDEX KEY:			0001673772
		STANDARD INDUSTRIAL CLASSIFICATION:	PHARMACEUTICAL PREPARATIONS [2834]
		IRS NUMBER:				473313701
		STATE OF INCORPORATION:			DE
		FISCAL YEAR END:			1231

	BUSINESS ADDRESS:	
		STREET 1:		561 ECCLES AVENUE
		CITY:			SOUTH SAN FRANCISCO
		STATE:			CA
		ZIP:			94080
		BUSINESS PHONE:		(650) 489-9000

	MAIL ADDRESS:	
		STREET 1:		561 ECCLES AVENUE
		CITY:			SOUTH SAN FRANCISCO
		STATE:			CA
		ZIP:			94080

	FORMER COMPANY:	
		FORMER CONFORMED NAME:	FLX Bio, Inc.
		DATE OF NAME CHANGE:	20160504
</SEC-HEADER>
<DOCUMENT>
<TYPE>4
<SEQUENCE>1
<FILENAME>tv532611_4.xml
<DESCRIPTION>OWNERSHIP DOCUMENT
<TEXT>
<XML>
<?xml version="1.0"?>
<ownershipDocument>

    <schemaVersion>X0306</schemaVersion>

    <documentType>4</documentType>

    <periodOfReport>2019-11-04</periodOfReport>

    <notSubjectToSection16>0</notSubjectToSection16>

    <issuer>
        <issuerCik>0001673772</issuerCik>
        <issuerName>RAPT Therapeutics, Inc.</issuerName>
        <issuerTradingSymbol>RAPT</issuerTradingSymbol>
    </issuer>

    <reportingOwner>
        <reportingOwnerId>
            <rptOwnerCik>0001615782</rptOwnerCik>
            <rptOwnerName>Topspin Fund L.P.</rptOwnerName>
        </reportingOwnerId>
        <reportingOwnerAddress>
            <rptOwnerStreet1>THREE EXPRESSWAY PLAZA</rptOwnerStreet1>
            <rptOwnerStreet2></rptOwnerStreet2>
            <rptOwnerCity>ROSLYN HEIGHTS</rptOwnerCity>
            <rptOwnerState>NY</rptOwnerState>
            <rptOwnerZipCode>11577</rptOwnerZipCode>
            <rptOwnerStateDescription></rptOwnerStateDescription>
        </reportingOwnerAddress>
        <reportingOwnerRelationship>
            <isDirector>0</isDirector>
            <isOfficer>0</isOfficer>
            <isTenPercentOwner>1</isTenPercentOwner>
            <isOther>0</isOther>
            <officerTitle></officerTitle>
            <otherText></otherText>
        </reportingOwnerRelationship>
    </reportingOwner>

    <reportingOwner>
        <reportingOwnerId>
            <rptOwnerCik>0001745827</rptOwnerCik>
            <rptOwnerName>Topspin Biotech Fund II, L.P.</rptOwnerName>
        </reportingOwnerId>
        <reportingOwnerAddress>
            <rptOwnerStreet1>3 EXPRESSWAY PLAZA</rptOwnerStreet1>
            <rptOwnerStreet2></rptOwnerStreet2>
            <rptOwnerCity>ROSLYN HEIGHTS</rptOwnerCity>
            <rptOwnerState>NY</rptOwnerState>
            <rptOwnerZipCode>11577</rptOwnerZipCode>
            <rptOwnerStateDescription></rptOwnerStateDescription>
        </reportingOwnerAddress>
        <reportingOwnerRelationship>
            <isDirector>0</isDirector>
            <isOfficer>0</isOfficer>
            <isTenPercentOwner>1</isTenPercentOwner>
            <isOther>0</isOther>
            <officerTitle></officerTitle>
            <otherText></otherText>
        </reportingOwnerRelationship>
    </reportingOwner>

    <reportingOwner>
        <reportingOwnerId>
            <rptOwnerCik>0001685869</rptOwnerCik>
            <rptOwnerName>LG Management, LLC</rptOwnerName>
        </reportingOwnerId>
        <reportingOwnerAddress>
            <rptOwnerStreet1>3 EXPRESSWAY PLAZA</rptOwnerStreet1>
            <rptOwnerStreet2></rptOwnerStreet2>
            <rptOwnerCity>ROSLYN HEIGHTS</rptOwnerCity>
            <rptOwnerState>NY</rptOwnerState>
            <rptOwnerZipCode>11577</rptOwnerZipCode>
            <rptOwnerStateDescription></rptOwnerStateDescription>
        </reportingOwnerAddress>
        <reportingOwnerRelationship>
            <isDirector>0</isDirector>
            <isOfficer>0</isOfficer>
            <isTenPercentOwner>1</isTenPercentOwner>
            <isOther>0</isOther>
            <officerTitle></officerTitle>
            <otherText></otherText>
        </reportingOwnerRelationship>
    </reportingOwner>

    <reportingOwner>
        <reportingOwnerId>
            <rptOwnerCik>0001200183</rptOwnerCik>
            <rptOwnerName>GUTHART LEO</rptOwnerName>
        </reportingOwnerId>
        <reportingOwnerAddress>
            <rptOwnerStreet1>3 EXPRESSWAY PLAZA</rptOwnerStreet1>
            <rptOwnerStreet2></rptOwnerStreet2>
            <rptOwnerCity>ROSLYN HEIGHTS</rptOwnerCity>
            <rptOwnerState>NY</rptOwnerState>
            <rptOwnerZipCode>11577</rptOwnerZipCode>
            <rptOwnerStateDescription></rptOwnerStateDescription>
        </reportingOwnerAddress>
        <reportingOwnerRelationship>
            <isDirector>0</isDirector>
            <isOfficer>0</isOfficer>
            <isTenPercentOwner>1</isTenPercentOwner>
            <isOther>0</isOther>
            <officerTitle></officerTitle>
            <otherText></otherText>
        </reportingOwnerRelationship>
    </reportingOwner>

    <nonDerivativeTable>
        <nonDerivativeTransaction>
            <securityTitle>
                <value>Common Stock</value>
            </securityTitle>
            <transactionDate>
                <value>2019-11-04</value>
            </transactionDate>
            <deemedExecutionDate></deemedExecutionDate>
            <transactionCoding>
                <transactionFormType>4</transactionFormType>
                <transactionCode>P</transactionCode>
                <equitySwapInvolved>0</equitySwapInvolved>
            </transactionCoding>
            <transactionTimeliness></transactionTimeliness>
            <transactionAmounts>
                <transactionShares>
                    <value>415000</value>
                </transactionShares>
                <transactionPricePerShare>
                    <value>12.00</value>
                </transactionPricePerShare>
                <transactionAcquiredDisposedCode>
                    <value>A</value>
                </transactionAcquiredDisposedCode>
            </transactionAmounts>
            <postTransactionAmounts>
                <sharesOwnedFollowingTransaction>
                    <value>2575371</value>
                    <footnoteId id="F1"/>
                    <footnoteId id="F3"/>
                    <footnoteId id="F4"/>
                </sharesOwnedFollowingTransaction>
            </postTransactionAmounts>
            <ownershipNature>
                <directOrIndirectOwnership>
                    <value>I</value>
                </directOrIndirectOwnership>
                <natureOfOwnership>
                    <value>See Footnote</value>
                    <footnoteId id="F1"/>
                </natureOfOwnership>
            </ownershipNature>
        </nonDerivativeTransaction>
    </nonDerivativeTable>

    <derivativeTable>
        <derivativeTransaction>
            <securityTitle>
                <value>Series B Preferred Stock</value>
            </securityTitle>
            <conversionOrExercisePrice>
                <footnoteId id="F2"/>
            </conversionOrExercisePrice>
            <transactionDate>
                <value>2019-11-04</value>
            </transactionDate>
            <deemedExecutionDate></deemedExecutionDate>
            <transactionCoding>
                <transactionFormType>4</transactionFormType>
                <transactionCode>C</transactionCode>
                <equitySwapInvolved>0</equitySwapInvolved>
            </transactionCoding>
            <transactionTimeliness></transactionTimeliness>
            <transactionAmounts>
                <transactionShares>
                    <value>1641666</value>
                </transactionShares>
                <transactionPricePerShare>
                    <footnoteId id="F2"/>
                </transactionPricePerShare>
                <transactionAcquiredDisposedCode>
                    <value>D</value>
                </transactionAcquiredDisposedCode>
            </transactionAmounts>
            <exerciseDate>
                <value>2019-11-04</value>
            </exerciseDate>
            <expirationDate>
                <footnoteId id="F2"/>
            </expirationDate>
            <underlyingSecurity>
                <underlyingSecurityTitle>
                    <value>Common Stock</value>
                </underlyingSecurityTitle>
                <underlyingSecurityShares>
                    <value>1641666</value>
                </underlyingSecurityShares>
            </underlyingSecurity>
            <postTransactionAmounts>
                <sharesOwnedFollowingTransaction>
                    <value>0</value>
                </sharesOwnedFollowingTransaction>
            </postTransactionAmounts>
            <ownershipNature>
                <directOrIndirectOwnership>
                    <value>I</value>
                </directOrIndirectOwnership>
                <natureOfOwnership>
                    <value>See footnotes 2, 3 and 4</value>
                </natureOfOwnership>
            </ownershipNature>
        </derivativeTransaction>
        <derivativeTransaction>
            <securityTitle>
                <value>Series C Preferred Stock</value>
            </securityTitle>
            <conversionOrExercisePrice>
                <footnoteId id="F2"/>
            </conversionOrExercisePrice>
            <transactionDate>
                <value>2019-11-04</value>
            </transactionDate>
            <deemedExecutionDate></deemedExecutionDate>
            <transactionCoding>
                <transactionFormType>4</transactionFormType>
                <transactionCode>C</transactionCode>
                <equitySwapInvolved>0</equitySwapInvolved>
            </transactionCoding>
            <transactionTimeliness></transactionTimeliness>
            <transactionAmounts>
                <transactionShares>
                    <value>363504</value>
                </transactionShares>
                <transactionPricePerShare>
                    <footnoteId id="F2"/>
                </transactionPricePerShare>
                <transactionAcquiredDisposedCode>
                    <value>D</value>
                </transactionAcquiredDisposedCode>
            </transactionAmounts>
            <exerciseDate>
                <value>2019-11-04</value>
            </exerciseDate>
            <expirationDate>
                <footnoteId id="F2"/>
            </expirationDate>
            <underlyingSecurity>
                <underlyingSecurityTitle>
                    <value>Common Stock</value>
                </underlyingSecurityTitle>
                <underlyingSecurityShares>
                    <value>363504</value>
                </underlyingSecurityShares>
            </underlyingSecurity>
            <postTransactionAmounts>
                <sharesOwnedFollowingTransaction>
                    <value>0</value>
                </sharesOwnedFollowingTransaction>
            </postTransactionAmounts>
            <ownershipNature>
                <directOrIndirectOwnership>
                    <value>D</value>
                </directOrIndirectOwnership>
            </ownershipNature>
        </derivativeTransaction>
        <derivativeTransaction>
            <securityTitle>
                <value>Series C-2 Preferred Stock</value>
            </securityTitle>
            <conversionOrExercisePrice>
                <footnoteId id="F2"/>
            </conversionOrExercisePrice>
            <transactionDate>
                <value>2019-11-04</value>
            </transactionDate>
            <deemedExecutionDate></deemedExecutionDate>
            <transactionCoding>
                <transactionFormType>4</transactionFormType>
                <transactionCode>C</transactionCode>
                <equitySwapInvolved>0</equitySwapInvolved>
            </transactionCoding>
            <transactionTimeliness></transactionTimeliness>
            <transactionAmounts>
                <transactionShares>
                    <value>155201</value>
                </transactionShares>
                <transactionPricePerShare>
                    <footnoteId id="F2"/>
                </transactionPricePerShare>
                <transactionAcquiredDisposedCode>
                    <value>D</value>
                </transactionAcquiredDisposedCode>
            </transactionAmounts>
            <exerciseDate>
                <value>2019-11-04</value>
            </exerciseDate>
            <expirationDate>
                <footnoteId id="F2"/>
            </expirationDate>
            <underlyingSecurity>
                <underlyingSecurityTitle>
                    <value>Common Stock</value>
                </underlyingSecurityTitle>
                <underlyingSecurityShares>
                    <value>155201</value>
                </underlyingSecurityShares>
            </underlyingSecurity>
            <postTransactionAmounts>
                <sharesOwnedFollowingTransaction>
                    <value>0</value>
                </sharesOwnedFollowingTransaction>
            </postTransactionAmounts>
            <ownershipNature>
                <directOrIndirectOwnership>
                    <value>D</value>
                </directOrIndirectOwnership>
            </ownershipNature>
        </derivativeTransaction>
    </derivativeTable>

    <footnotes>
        <footnote id="F1">Consists of (1) 1,641,666 shares held of record by Topspin Biotech Fund II, LP; and (ii) 933,705 shares held of record by Topspin Fund, LP. Each of Topspin Biotech Fund II, LP and Topspin Fund, LP disclaims beneficial ownership of the shares held of record by the other.</footnote>
        <footnote id="F2">Each share of Series B, C and C-2 Preferred Stock shown in Column 5 converted into one share of Common Stock automatically upon the closing of the Issuer's initial public offering without payment of further consideration. The shares have no expiration date. Giving effect to such conversion, the ownership by the reporting persons of the shares of the Issuer's common stock is as set forth in Note 1 above.</footnote>
        <footnote id="F3">1,641,666 of such shares are held directly by Topspin Biotech Fund II, L.P. LG Management, LLC, the general partner of Topspin Biotech Fund II, L.P., may be deemed to have voting and dispositive power with respect to the shares. Leo A. Guthart, the managing member of LG Management, LLC, may also be deemed to have voting and dispositive power with respect to the shares. Each of LG Management, LLC and Leo A. Guthart disclaims beneficial ownership of the shares, except to the extent of their respective indirect pecuniary interests in such shares.</footnote>
        <footnote id="F4">933,705 of such shares are held directly by Topspin Fund L.P. LG Management, LLC, the general partner of Topspin Fund L.P., may be deemed to have voting and dispositive power with respect to the shares. Leo A. Guthart, the managing member of LG Management, LLC, may also be deemed to have voting and dispositive power with respect to the shares. Each of LG Management, LLC and Leo A. Guthart disclaims beneficial ownership of the shares, except to the extent of their respective indirect pecuniary interests in such shares.</footnote>
    </footnotes>

    <ownerSignature>
        <signatureName>TOPSPIN FUND L.P., /s/ Leo A. Guthart, Managing Member of the General Partner</signatureName>
        <signatureDate>2019-11-15</signatureDate>
    </ownerSignature>

    <ownerSignature>
        <signatureName>TOPSPIN BIOTECH FUND II, L.P., /s/ Leo A. Guthart, Managing Member of the General Partner</signatureName>
        <signatureDate>2019-11-15</signatureDate>
    </ownerSignature>

    <ownerSignature>
        <signatureName>LG MANAGEMENT, LLC, /s/ Leo A. Guthart, Managing Member</signatureName>
        <signatureDate>2019-11-15</signatureDate>
    </ownerSignature>

    <ownerSignature>
        <signatureName>/s/ Leo A. Guthart</signatureName>
        <signatureDate>2019-11-15</signatureDate>
    </ownerSignature>
</ownershipDocument>
</XML>
</TEXT>
</DOCUMENT>
</SEC-DOCUMENT>
