<SEC-DOCUMENT>0001969223-23-000132.txt : 20230525
<SEC-HEADER>0001969223-23-000132.hdr.sgml : 20230525
<ACCEPTANCE-DATETIME>20230525161929
ACCESSION NUMBER:		0001969223-23-000132
CONFORMED SUBMISSION TYPE:	144
PUBLIC DOCUMENT COUNT:		1
FILED AS OF DATE:		20230525
DATE AS OF CHANGE:		20230525

SUBJECT COMPANY:	

	COMPANY DATA:	
		COMPANY CONFORMED NAME:			AVROBIO, Inc.
		CENTRAL INDEX KEY:			0001681087
		STANDARD INDUSTRIAL CLASSIFICATION:	BIOLOGICAL PRODUCTS (NO DIAGNOSTIC SUBSTANCES) [2836]
		IRS NUMBER:				810710585
		STATE OF INCORPORATION:			DE
		FISCAL YEAR END:			1231

	FILING VALUES:
		FORM TYPE:		144
		SEC ACT:		1933 Act
		SEC FILE NUMBER:	001-38537
		FILM NUMBER:		23960838

	BUSINESS ADDRESS:	
		STREET 1:		100 TECHNOLOGY SQUARE
		STREET 2:		6TH FLOOR
		CITY:			CAMBRIDGE
		STATE:			MA
		ZIP:			02139
		BUSINESS PHONE:		617.914.8420

	MAIL ADDRESS:	
		STREET 1:		100 TECHNOLOGY SQUARE
		STREET 2:		6TH FLOOR
		CITY:			CAMBRIDGE
		STATE:			MA
		ZIP:			02139

	FORMER COMPANY:	
		FORMER CONFORMED NAME:	AvroBio, Inc.
		DATE OF NAME CHANGE:	20160729

REPORTING-OWNER:	

	COMPANY DATA:	
		COMPANY CONFORMED NAME:			MACKAY GEOFFREY
		CENTRAL INDEX KEY:			0001741849

	FILING VALUES:
		FORM TYPE:		144

	MAIL ADDRESS:	
		STREET 1:		C/O AVROBIO, INC.
		STREET 2:		ONE KENDALL SQ, BLDG. 300, STE. 201
		CITY:			CAMBRIDGE
		STATE:			MA
		ZIP:			02139
</SEC-HEADER>
<DOCUMENT>
<TYPE>144
<SEQUENCE>1
<FILENAME>primary_doc.xml
<TEXT>
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  <headerData>
    <submissionType>144</submissionType>
    <filerInfo>
      <filer>
        <filerCredentials>
          <cik>0001741849</cik>
          <ccc>XXXXXXXX</ccc>
        </filerCredentials>
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      <liveTestFlag>LIVE</liveTestFlag>



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  <formData>
    <issuerInfo>
      <issuerCik>0001681087</issuerCik>
      <issuerName>AvroBio, Inc. </issuerName>
      <secFileNumber>001-38537</secFileNumber>
      <issuerAddress>
        <com:street1>100 Technology Square</com:street1>
        <com:street2>Sixth Floor</com:street2>
        <com:city>Cambridge</com:city>
        <com:stateOrCountry>MA</com:stateOrCountry>
        <com:zipCode>02139</com:zipCode>
      </issuerAddress>
      <issuerContactPhone>6179148420</issuerContactPhone>
      <nameOfPersonForWhoseAccountTheSecuritiesAreToBeSold>Geoff MacKay</nameOfPersonForWhoseAccountTheSecuritiesAreToBeSold>
      <relationshipsToIssuer>
        <relationshipToIssuer>Former CEO </relationshipToIssuer>
      </relationshipsToIssuer>
    </issuerInfo>
    <securitiesInformation>
      <securitiesClassTitle>Common</securitiesClassTitle>
      <brokerOrMarketmakerDetails>
        <name>UBS Financial Services Inc</name>
        <address>
          <com:street1>1000 Harbor Blvd</com:street1>
          <com:street2>3rd Floor</com:street2>
          <com:city>Weehawken</com:city>
          <com:stateOrCountry>NJ</com:stateOrCountry>
          <com:zipCode>07086</com:zipCode>
        </address>
      </brokerOrMarketmakerDetails>
      <noOfUnitsSold>186841</noOfUnitsSold>
      <aggregateMarketValue>227946.02</aggregateMarketValue>
      <noOfUnitsOutstanding>44105078</noOfUnitsOutstanding>
      <approxSaleDate>05/25/2023</approxSaleDate>
      <securitiesExchangeName>NASDAQ</securitiesExchangeName>
    </securitiesInformation>
    <securitiesToBeSold>
      <securitiesClassTitle>Common</securitiesClassTitle>
      <acquiredDate>11/17/2015</acquiredDate>
      <natureOfAcquisitionTransaction>Private Transaction/Founders Shares</natureOfAcquisitionTransaction>
      <nameOfPersonfromWhomAcquired>AvroBio, Inc. </nameOfPersonfromWhomAcquired>
      <isGiftTransaction>N</isGiftTransaction>
      <amountOfSecuritiesAcquired>142295</amountOfSecuritiesAcquired>
      <paymentDate>11/17/2015</paymentDate>
      <natureOfPayment>Cash</natureOfPayment>
    </securitiesToBeSold>
    <securitiesToBeSold>
      <securitiesClassTitle>Common</securitiesClassTitle>
      <acquiredDate>12/24/2020</acquiredDate>
      <natureOfAcquisitionTransaction>Option Exercise</natureOfAcquisitionTransaction>
      <nameOfPersonfromWhomAcquired>AvroBio Inc</nameOfPersonfromWhomAcquired>
      <isGiftTransaction>N</isGiftTransaction>
      <amountOfSecuritiesAcquired>100000</amountOfSecuritiesAcquired>
      <paymentDate>12/24/2020</paymentDate>
      <natureOfPayment>Cash</natureOfPayment>
    </securitiesToBeSold>
    <nothingToReportFlagOnSecuritiesSoldInPast3Months>N</nothingToReportFlagOnSecuritiesSoldInPast3Months>
    <securitiesSoldInPast3Months>
      <sellerDetails>
        <name>The Kali M MacKay Irrevocable Trust </name>
        <address>
          <com:street1>1 Franklin St</com:street1>
          <com:street2>Apt 4304</com:street2>
          <com:city>Boston</com:city>
          <com:stateOrCountry>MA</com:stateOrCountry>
          <com:zipCode>02110</com:zipCode>
        </address>
      </sellerDetails>
      <securitiesClassTitle>AvroBio, Inc. </securitiesClassTitle>
      <saleDate>05/24/2023</saleDate>
      <amountOfSecuritiesSold>72604</amountOfSecuritiesSold>
      <grossProceeds>92930</grossProceeds>
    </securitiesSoldInPast3Months>
    <securitiesSoldInPast3Months>
      <sellerDetails>
        <name>The Mac C. MacKay Irrevocable Trust</name>
        <address>
          <com:street1>1 Franklin St</com:street1>
          <com:street2>Apt 4304</com:street2>
          <com:city>Boston</com:city>
          <com:stateOrCountry>MA</com:stateOrCountry>
          <com:zipCode>02110</com:zipCode>
        </address>
      </sellerDetails>
      <securitiesClassTitle>AvroBio, Inc.</securitiesClassTitle>
      <saleDate>05/24/2023</saleDate>
      <amountOfSecuritiesSold>72604</amountOfSecuritiesSold>
      <grossProceeds>95108</grossProceeds>
    </securitiesSoldInPast3Months>
    <securitiesSoldInPast3Months>
      <sellerDetails>
        <name>Geoff MacKay</name>
        <address>
          <com:street1>1 Franklin St</com:street1>
          <com:street2>Apt 4304</com:street2>
          <com:city>Boston</com:city>
          <com:stateOrCountry>MA</com:stateOrCountry>
          <com:zipCode>02110</com:zipCode>
        </address>
      </sellerDetails>
      <securitiesClassTitle>AvroBio, Inc.</securitiesClassTitle>
      <saleDate>05/24/2023</saleDate>
      <amountOfSecuritiesSold>292215</amountOfSecuritiesSold>
      <grossProceeds>372079</grossProceeds>
    </securitiesSoldInPast3Months>
    <noticeSignature>
      <noticeDate>05/25/2023</noticeDate>
      <signature>/s/ UBS Financial Services Inc, as attorney-in-fact for Geoff MacKay</signature>
    </noticeSignature>
  </formData>
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</SEC-DOCUMENT>
