<SEC-DOCUMENT>0001950047-24-005142.txt : 20240701
<SEC-HEADER>0001950047-24-005142.hdr.sgml : 20240701
<ACCEPTANCE-DATETIME>20240701164223
ACCESSION NUMBER:		0001950047-24-005142
CONFORMED SUBMISSION TYPE:	144
PUBLIC DOCUMENT COUNT:		1
FILED AS OF DATE:		20240701
DATE AS OF CHANGE:		20240701

SUBJECT COMPANY:	

	COMPANY DATA:	
		COMPANY CONFORMED NAME:			REGENXBIO Inc.
		CENTRAL INDEX KEY:			0001590877
		STANDARD INDUSTRIAL CLASSIFICATION:	BIOLOGICAL PRODUCTS (NO DIAGNOSTIC SUBSTANCES) [2836]
		ORGANIZATION NAME:           	03 Life Sciences
		IRS NUMBER:				471851754
		FISCAL YEAR END:			1231

	FILING VALUES:
		FORM TYPE:		144
		SEC ACT:		1933 Act
		SEC FILE NUMBER:	001-37553
		FILM NUMBER:		241091289

	BUSINESS ADDRESS:	
		STREET 1:		9804 MEDICAL CENTER DRIVE
		CITY:			ROCKVILLE
		STATE:			MD
		ZIP:			20850
		BUSINESS PHONE:		240-552-8181

	MAIL ADDRESS:	
		STREET 1:		9804 MEDICAL CENTER DRIVE
		CITY:			ROCKVILLE
		STATE:			MD
		ZIP:			20850

	FORMER COMPANY:	
		FORMER CONFORMED NAME:	REGENXBIO, Inc.
		DATE OF NAME CHANGE:	20150116

	FORMER COMPANY:	
		FORMER CONFORMED NAME:	ReGenX Biosciences, LLC
		DATE OF NAME CHANGE:	20131101

REPORTING-OWNER:	

	COMPANY DATA:	
		COMPANY CONFORMED NAME:			KARABELAS ARGERIS N
		CENTRAL INDEX KEY:			0001191229
		ORGANIZATION NAME:           	

	FILING VALUES:
		FORM TYPE:		144
</SEC-HEADER>
<DOCUMENT>
<TYPE>144
<SEQUENCE>1
<FILENAME>primary_doc.xml
<TEXT>
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        <submissionType>144</submissionType>
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                <filerCredentials>
                    <cik>0001191229</cik>
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        <issuerInfo>
            <issuerCik>0001590877</issuerCik>
            <issuerName>REGENXBIO Inc.</issuerName>
            <secFileNumber>001-37553</secFileNumber>
            <issuerAddress>
                <ns2:street1>9804 Medical Center Drive </ns2:street1>
                <ns2:city>Rockville</ns2:city>
                <ns2:stateOrCountry>MD</ns2:stateOrCountry>
                <ns2:zipCode>20850</ns2:zipCode>
            </issuerAddress>
            <issuerContactPhone>2405528181</issuerContactPhone>
            <nameOfPersonForWhoseAccountTheSecuritiesAreToBeSold>ARGERIS N KARABELAS</nameOfPersonForWhoseAccountTheSecuritiesAreToBeSold>
            <relationshipsToIssuer>
                <relationshipToIssuer>Director</relationshipToIssuer>
            </relationshipsToIssuer>
        </issuerInfo>
        <securitiesInformation>
            <securitiesClassTitle>COMMON</securitiesClassTitle>
            <brokerOrMarketmakerDetails>
                <name>Morgan Stanley Smith Barney LLC Executive Financial Services</name>
                <address>
                    <ns2:street1>1 New York Plaza</ns2:street1>
                    <ns2:street2>8th Floor</ns2:street2>
                    <ns2:city>New York</ns2:city>
                    <ns2:stateOrCountry>NY</ns2:stateOrCountry>
                    <ns2:zipCode>10004</ns2:zipCode>
                </address>
            </brokerOrMarketmakerDetails>
            <noOfUnitsSold>30000</noOfUnitsSold>
            <aggregateMarketValue>351000.00</aggregateMarketValue>
            <noOfUnitsOutstanding>49255966</noOfUnitsOutstanding>
            <approxSaleDate>07/01/2024</approxSaleDate>
            <securitiesExchangeName>NASDAQ</securitiesExchangeName>
        </securitiesInformation>
        <securitiesToBeSold>
            <securitiesClassTitle>Common</securitiesClassTitle>
            <acquiredDate>07/01/2024</acquiredDate>
            <natureOfAcquisitionTransaction>Exercise of Stock Options</natureOfAcquisitionTransaction>
            <nameOfPersonfromWhomAcquired>Issuer</nameOfPersonfromWhomAcquired>
            <isGiftTransaction>N</isGiftTransaction>
            <amountOfSecuritiesAcquired>30000</amountOfSecuritiesAcquired>
            <paymentDate>07/01/2024</paymentDate>
            <natureOfPayment>Cash</natureOfPayment>
        </securitiesToBeSold>
        <nothingToReportFlagOnSecuritiesSoldInPast3Months>Y</nothingToReportFlagOnSecuritiesSoldInPast3Months>
        <remarks>The securities to be sold were and will be received upon the exercise of stock options over the next three months.&#13;
The date of acquisition and payment was and will be the date of exercise/sale.&#13;
</remarks>
        <noticeSignature>
            <noticeDate>07/01/2024</noticeDate>
            <planAdoptionDates>
                <planAdoptionDate>03/25/2024</planAdoptionDate>
            </planAdoptionDates>
            <signature>/s/  Argeris N Karabelas</signature>
        </noticeSignature>
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