<SEC-DOCUMENT>0001961863-24-000048.txt : 20240223
<SEC-HEADER>0001961863-24-000048.hdr.sgml : 20240223
<ACCEPTANCE-DATETIME>20240223172308
ACCESSION NUMBER:		0001961863-24-000048
CONFORMED SUBMISSION TYPE:	144
PUBLIC DOCUMENT COUNT:		1
FILED AS OF DATE:		20240223
DATE AS OF CHANGE:		20240223

SUBJECT COMPANY:	

	COMPANY DATA:	
		COMPANY CONFORMED NAME:			Dyne Therapeutics, Inc.
		CENTRAL INDEX KEY:			0001818794
		STANDARD INDUSTRIAL CLASSIFICATION:	PHARMACEUTICAL PREPARATIONS [2834]
		ORGANIZATION NAME:           	03 Life Sciences
		IRS NUMBER:				364883909
		STATE OF INCORPORATION:			DE
		FISCAL YEAR END:			1231

	FILING VALUES:
		FORM TYPE:		144
		SEC ACT:		1933 Act
		SEC FILE NUMBER:	001-39509
		FILM NUMBER:		24672696

	BUSINESS ADDRESS:	
		STREET 1:		1560 TRAPELO ROAD
		CITY:			WALTHAM
		STATE:			MA
		ZIP:			02451
		BUSINESS PHONE:		(781) 786-8230

	MAIL ADDRESS:	
		STREET 1:		1560 TRAPELO ROAD
		CITY:			WALTHAM
		STATE:			MA
		ZIP:			02451

REPORTING-OWNER:	

	COMPANY DATA:	
		COMPANY CONFORMED NAME:			Atlas Venture Opportunity Fund II, L.P.
		CENTRAL INDEX KEY:			0001885327
		ORGANIZATION NAME:           	
		IRS NUMBER:				872809161
		STATE OF INCORPORATION:			DE
		FISCAL YEAR END:			1231

	FILING VALUES:
		FORM TYPE:		144

	BUSINESS ADDRESS:	
		STREET 1:		300 TECHNOLOGY SQUARE
		STREET 2:		8TH FLOOR
		CITY:			CAMBRIDGE
		STATE:			MA
		ZIP:			02139
		BUSINESS PHONE:		857-201-2700

	MAIL ADDRESS:	
		STREET 1:		300 TECHNOLOGY SQUARE
		STREET 2:		8TH FLOOR
		CITY:			CAMBRIDGE
		STATE:			MA
		ZIP:			02139
</SEC-HEADER>
<DOCUMENT>
<TYPE>144
<SEQUENCE>1
<FILENAME>primary_doc.xml
<TEXT>
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      <issuerCik>0001818794</issuerCik>
      <issuerName>Dyne Therapeutics, Inc.</issuerName>
      <secFileNumber>001-39509</secFileNumber>
      <issuerAddress>
        <com:street1>1560 TRAPELO ROAD</com:street1>
        <com:city>WALTHAM</com:city>
        <com:stateOrCountry>MA</com:stateOrCountry>
        <com:zipCode>02451</com:zipCode>
      </issuerAddress>
      <issuerContactPhone>(781) 786-8230</issuerContactPhone>
      <nameOfPersonForWhoseAccountTheSecuritiesAreToBeSold>Atlas Venture Opportunity Fund II, L.P.</nameOfPersonForWhoseAccountTheSecuritiesAreToBeSold>
      <relationshipsToIssuer>
        <relationshipToIssuer>Shareholder</relationshipToIssuer>
      </relationshipsToIssuer>
    </issuerInfo>
    <securitiesInformation>
      <securitiesClassTitle>Common</securitiesClassTitle>
      <brokerOrMarketmakerDetails>
        <name>Merrill</name>
        <address>
          <com:street1>555 California Street</com:street1>
          <com:street2>Floor 18</com:street2>
          <com:city>San Francisco</com:city>
          <com:stateOrCountry>CA</com:stateOrCountry>
          <com:zipCode>94104</com:zipCode>
        </address>
      </brokerOrMarketmakerDetails>
      <noOfUnitsSold>100000</noOfUnitsSold>
      <aggregateMarketValue>2241000.00</aggregateMarketValue>
      <noOfUnitsOutstanding>61375598</noOfUnitsOutstanding>
      <approxSaleDate>02/23/2024</approxSaleDate>
      <securitiesExchangeName>NASDAQ</securitiesExchangeName>
    </securitiesInformation>
    <securitiesToBeSold>
      <securitiesClassTitle>Common</securitiesClassTitle>
      <acquiredDate>04/26/2019</acquiredDate>
      <natureOfAcquisitionTransaction>Private Placement</natureOfAcquisitionTransaction>
      <nameOfPersonfromWhomAcquired>Issuer</nameOfPersonfromWhomAcquired>
      <isGiftTransaction>N</isGiftTransaction>
      <amountOfSecuritiesAcquired>100000</amountOfSecuritiesAcquired>
      <paymentDate>04/26/2019</paymentDate>
      <natureOfPayment>Cash</natureOfPayment>
    </securitiesToBeSold>
    <nothingToReportFlagOnSecuritiesSoldInPast3Months>N</nothingToReportFlagOnSecuritiesSoldInPast3Months>
    <securitiesSoldInPast3Months>
      <sellerDetails>
        <name>Atlas Venture Fund XI, L.P.</name>
        <address>
          <com:street1>300 Technology Square</com:street1>
          <com:street2>Suite 8</com:street2>
          <com:city>Cambridge</com:city>
          <com:stateOrCountry>MA</com:stateOrCountry>
          <com:zipCode>02139</com:zipCode>
        </address>
      </sellerDetails>
      <securitiesClassTitle>Common</securitiesClassTitle>
      <saleDate>02/15/2024</saleDate>
      <amountOfSecuritiesSold>177906</amountOfSecuritiesSold>
      <grossProceeds>4249848.59</grossProceeds>
    </securitiesSoldInPast3Months>
    <securitiesSoldInPast3Months>
      <sellerDetails>
        <name>Atlas Venture Fund XI, L.P.</name>
        <address>
          <com:street1>300 Technology Square</com:street1>
          <com:street2>Suite 8</com:street2>
          <com:city>Cambridge</com:city>
          <com:stateOrCountry>MA</com:stateOrCountry>
          <com:zipCode>02139</com:zipCode>
        </address>
      </sellerDetails>
      <securitiesClassTitle>Common</securitiesClassTitle>
      <saleDate>02/16/2024</saleDate>
      <amountOfSecuritiesSold>162707</amountOfSecuritiesSold>
      <grossProceeds>3764512.97</grossProceeds>
    </securitiesSoldInPast3Months>
    <securitiesSoldInPast3Months>
      <sellerDetails>
        <name>Atlas Venture Fund XI, L.P.</name>
        <address>
          <com:street1>300 Technology Square</com:street1>
          <com:street2>Suite 8</com:street2>
          <com:city>Cambridge</com:city>
          <com:stateOrCountry>MA</com:stateOrCountry>
          <com:zipCode>02139</com:zipCode>
        </address>
      </sellerDetails>
      <securitiesClassTitle>Common</securitiesClassTitle>
      <saleDate>02/20/2024</saleDate>
      <amountOfSecuritiesSold>169539</amountOfSecuritiesSold>
      <grossProceeds>3852242.10</grossProceeds>
    </securitiesSoldInPast3Months>
    <securitiesSoldInPast3Months>
      <sellerDetails>
        <name>Atlas Venture Fund XI, L.P.</name>
        <address>
          <com:street1>300 Technology Square</com:street1>
          <com:street2>Suite 8</com:street2>
          <com:city>Cambridge</com:city>
          <com:stateOrCountry>MA</com:stateOrCountry>
          <com:zipCode>02139</com:zipCode>
        </address>
      </sellerDetails>
      <securitiesClassTitle>Common</securitiesClassTitle>
      <saleDate>02/21/2024</saleDate>
      <amountOfSecuritiesSold>184501</amountOfSecuritiesSold>
      <grossProceeds>4165304.91</grossProceeds>
    </securitiesSoldInPast3Months>
    <securitiesSoldInPast3Months>
      <sellerDetails>
        <name>Atlas Venture Fund XI, L.P.</name>
        <address>
          <com:street1>300 Technology Square</com:street1>
          <com:street2>Suite 8</com:street2>
          <com:city>Cambridge</com:city>
          <com:stateOrCountry>MA</com:stateOrCountry>
          <com:zipCode>02139</com:zipCode>
        </address>
      </sellerDetails>
      <securitiesClassTitle>Common</securitiesClassTitle>
      <saleDate>02/22/2024</saleDate>
      <amountOfSecuritiesSold>119360</amountOfSecuritiesSold>
      <grossProceeds>2704646.63</grossProceeds>
    </securitiesSoldInPast3Months>
    <noticeSignature>
      <noticeDate>02/23/2024</noticeDate>
      <planAdoptionDates>
        <planAdoptionDate>01/10/2024</planAdoptionDate>
      </planAdoptionDates>
      <signature>Ommer Chohan</signature>
    </noticeSignature>
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</DOCUMENT>
</SEC-DOCUMENT>
