<SEC-DOCUMENT>0001973141-24-000018.txt : 20240104
<SEC-HEADER>0001973141-24-000018.hdr.sgml : 20240104
<ACCEPTANCE-DATETIME>20240104160407
ACCESSION NUMBER:		0001973141-24-000018
CONFORMED SUBMISSION TYPE:	144
PUBLIC DOCUMENT COUNT:		1
FILED AS OF DATE:		20240104
DATE AS OF CHANGE:		20240104

SUBJECT COMPANY:	

	COMPANY DATA:	
		COMPANY CONFORMED NAME:			Keros Therapeutics, Inc.
		CENTRAL INDEX KEY:			0001664710
		STANDARD INDUSTRIAL CLASSIFICATION:	PHARMACEUTICAL PREPARATIONS [2834]
		ORGANIZATION NAME:           	03 Life Sciences
		IRS NUMBER:				811173868
		FISCAL YEAR END:			1231

	FILING VALUES:
		FORM TYPE:		144
		SEC ACT:		1933 Act
		SEC FILE NUMBER:	001-39264
		FILM NUMBER:		24511771

	BUSINESS ADDRESS:	
		STREET 1:		1050 WALTHAM STREET, SUITE 302
		CITY:			LEXINGTON
		STATE:			MA
		ZIP:			02421
		BUSINESS PHONE:		617-314-6297

	MAIL ADDRESS:	
		STREET 1:		1050 WALTHAM STREET, SUITE 302
		CITY:			LEXINGTON
		STATE:			MA
		ZIP:			02421

REPORTING-OWNER:	

	COMPANY DATA:	
		COMPANY CONFORMED NAME:			Regnante Keith
		CENTRAL INDEX KEY:			0001682068
		ORGANIZATION NAME:           	

	FILING VALUES:
		FORM TYPE:		144

	MAIL ADDRESS:	
		STREET 1:		733 CONCORD AVENUE
		CITY:			CAMBRIDGE
		STATE:			MA
		ZIP:			02138
</SEC-HEADER>
<DOCUMENT>
<TYPE>144
<SEQUENCE>1
<FILENAME>primary_doc.xml
<TEXT>
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    <submissionType>144</submissionType>
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      <filer>
        <filerCredentials>
          <cik>0001682068</cik>
          <ccc>XXXXXXXX</ccc>
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      <liveTestFlag>LIVE</liveTestFlag>



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  <formData>
    <issuerInfo>
      <issuerCik>0001664710</issuerCik>
      <issuerName>Keros Therapeutics, Inc.</issuerName>
      <secFileNumber>001-39264</secFileNumber>
      <issuerAddress>
        <com:street1>1050 WALTHAM STREET, SUITE 302</com:street1>
        <com:city>LEXINGTON</com:city>
        <com:stateOrCountry>MA</com:stateOrCountry>
        <com:zipCode>02421</com:zipCode>
      </issuerAddress>
      <issuerContactPhone>617-314-6297</issuerContactPhone>
      <nameOfPersonForWhoseAccountTheSecuritiesAreToBeSold>Regnante Keith</nameOfPersonForWhoseAccountTheSecuritiesAreToBeSold>
      <relationshipsToIssuer>
        <relationshipToIssuer>Officer</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>40000</noOfUnitsSold>
      <aggregateMarketValue>1811600.00</aggregateMarketValue>
      <noOfUnitsOutstanding>29959378</noOfUnitsOutstanding>
      <approxSaleDate>01/04/2024</approxSaleDate>
      <securitiesExchangeName>NASDAQ</securitiesExchangeName>
    </securitiesInformation>
    <securitiesToBeSold>
      <securitiesClassTitle>Common</securitiesClassTitle>
      <acquiredDate>01/04/2024</acquiredDate>
      <natureOfAcquisitionTransaction>Exercise of stock options</natureOfAcquisitionTransaction>
      <nameOfPersonfromWhomAcquired>Issuer</nameOfPersonfromWhomAcquired>
      <isGiftTransaction>N</isGiftTransaction>
      <amountOfSecuritiesAcquired>40000</amountOfSecuritiesAcquired>
      <paymentDate>01/04/2024</paymentDate>
      <natureOfPayment>CASH</natureOfPayment>
    </securitiesToBeSold>
    <nothingToReportFlagOnSecuritiesSoldInPast3Months>Y</nothingToReportFlagOnSecuritiesSoldInPast3Months>
    <noticeSignature>
      <noticeDate>01/04/2024</noticeDate>
      <planAdoptionDates>
        <planAdoptionDate>03/08/2023</planAdoptionDate>
      </planAdoptionDates>
      <signature>/s/ UBS Financial Services Inc, as attorney-in-fact for Keith Regnante</signature>
    </noticeSignature>
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