<SEC-DOCUMENT>0001415889-24-024416.txt : 20241002
<SEC-HEADER>0001415889-24-024416.hdr.sgml : 20241002
<ACCEPTANCE-DATETIME>20241002163520
ACCESSION NUMBER:		0001415889-24-024416
CONFORMED SUBMISSION TYPE:	4
PUBLIC DOCUMENT COUNT:		1
CONFORMED PERIOD OF REPORT:	20240930
FILED AS OF DATE:		20241002
DATE AS OF CHANGE:		20241002

REPORTING-OWNER:	

	OWNER DATA:	
		COMPANY CONFORMED NAME:			Kassberg Thomas Richard
		CENTRAL INDEX KEY:			0001303811
		ORGANIZATION NAME:           	

	FILING VALUES:
		FORM TYPE:		4
		SEC ACT:		1934 Act
		SEC FILE NUMBER:	001-39231
		FILM NUMBER:		241348080

	MAIL ADDRESS:	
		STREET 1:		C/O ULTRAGENYX PHARMACEUTICAL INC.
		STREET 2:		60 LEVERONI COURT
		CITY:			NOVATO
		STATE:			CA
		ZIP:			94949

ISSUER:		

	COMPANY DATA:	
		COMPANY CONFORMED NAME:			Passage BIO, Inc.
		CENTRAL INDEX KEY:			0001787297
		STANDARD INDUSTRIAL CLASSIFICATION:	BIOLOGICAL PRODUCTS (NO DIAGNOSTIC SUBSTANCES) [2836]
		ORGANIZATION NAME:           	03 Life Sciences
		IRS NUMBER:				822729751
		STATE OF INCORPORATION:			DE
		FISCAL YEAR END:			1231

	BUSINESS ADDRESS:	
		STREET 1:		ONE COMMERCE SQUARE
		STREET 2:		2005 MARKET STREET, 39TH FLOOR
		CITY:			PHILADELPHIA
		STATE:			PA
		ZIP:			19103
		BUSINESS PHONE:		2678660312

	MAIL ADDRESS:	
		STREET 1:		ONE COMMERCE SQUARE
		STREET 2:		2005 MARKET STREET, 39TH FLOOR
		CITY:			PHILADELPHIA
		STATE:			PA
		ZIP:			19103
</SEC-HEADER>
<DOCUMENT>
<TYPE>4
<SEQUENCE>1
<FILENAME>form4-10022024_081016.xml
<TEXT>
<XML>
<?xml version="1.0"?>
<ownershipDocument>

    <schemaVersion>X0508</schemaVersion>

    <documentType>4</documentType>

    <periodOfReport>2024-09-30</periodOfReport>

    <issuer>
        <issuerCik>0001787297</issuerCik>
        <issuerName>Passage BIO, Inc.</issuerName>
        <issuerTradingSymbol>PASG</issuerTradingSymbol>
    </issuer>

    <reportingOwner>
        <reportingOwnerId>
            <rptOwnerCik>0001303811</rptOwnerCik>
            <rptOwnerName>Kassberg Thomas Richard</rptOwnerName>
        </reportingOwnerId>
        <reportingOwnerAddress>
            <rptOwnerStreet1>ONE COMMERCE SQUARE</rptOwnerStreet1>
            <rptOwnerStreet2>2005 MARKET STREET, 39TH FLOOR</rptOwnerStreet2>
            <rptOwnerCity>PHILADELPHIA</rptOwnerCity>
            <rptOwnerState>PA</rptOwnerState>
            <rptOwnerZipCode>19103</rptOwnerZipCode>
            <rptOwnerStateDescription></rptOwnerStateDescription>
        </reportingOwnerAddress>
        <reportingOwnerRelationship>
            <isDirector>true</isDirector>
            <isOfficer>false</isOfficer>
            <isTenPercentOwner>false</isTenPercentOwner>
            <isOther>false</isOther>
            <officerTitle></officerTitle>
            <otherText></otherText>
        </reportingOwnerRelationship>
    </reportingOwner>

    <aff10b5One>0</aff10b5One>

    <nonDerivativeTable></nonDerivativeTable>

    <derivativeTable>
        <derivativeTransaction>
            <securityTitle>
                <value>Employee Stock Option (right to buy)</value>
            </securityTitle>
            <conversionOrExercisePrice>
                <value>.70</value>
            </conversionOrExercisePrice>
            <transactionDate>
                <value>2024-09-30</value>
            </transactionDate>
            <transactionCoding>
                <transactionFormType>4</transactionFormType>
                <transactionCode>A</transactionCode>
                <equitySwapInvolved>0</equitySwapInvolved>
            </transactionCoding>
            <transactionAmounts>
                <transactionShares>
                    <value>174139</value>
                </transactionShares>
                <transactionPricePerShare>
                    <value>0</value>
                </transactionPricePerShare>
                <transactionAcquiredDisposedCode>
                    <value>A</value>
                </transactionAcquiredDisposedCode>
            </transactionAmounts>
            <exerciseDate>
                <footnoteId id="F1"/>
            </exerciseDate>
            <expirationDate>
                <value>2034-09-30</value>
            </expirationDate>
            <underlyingSecurity>
                <underlyingSecurityTitle>
                    <value>Common Stock</value>
                </underlyingSecurityTitle>
                <underlyingSecurityShares>
                    <value>174139</value>
                </underlyingSecurityShares>
            </underlyingSecurity>
            <postTransactionAmounts>
                <sharesOwnedFollowingTransaction>
                    <value>174139</value>
                </sharesOwnedFollowingTransaction>
            </postTransactionAmounts>
            <ownershipNature>
                <directOrIndirectOwnership>
                    <value>D</value>
                </directOrIndirectOwnership>
                <natureOfOwnership>
                    <value></value>
                </natureOfOwnership>
            </ownershipNature>
        </derivativeTransaction>
    </derivativeTable>

    <footnotes>
        <footnote id="F1">The stock option vests as to 1/36 of the total shares monthly beginning on October 10, 2024 until fully vested, subject to the Reporting Person's provision of service to the Issuer on each vesting date.</footnote>
    </footnotes>

    <ownerSignature>
        <signatureName>/s/ Edgar Cale, Attorney-in-Fact</signatureName>
        <signatureDate>2024-10-02</signatureDate>
    </ownerSignature>
</ownershipDocument>
</XML>
</TEXT>
</DOCUMENT>
</SEC-DOCUMENT>
