    <SEC-DOCUMENT>0001104659-23-048961-index.html : 20230424
    <SEC-HEADER>0001104659-23-048961.hdr.sgml : 20230424
    <ACCEPTANCE-DATETIME>20230424160421
    ACCESSION NUMBER:		0001104659-23-048961
    CONFORMED SUBMISSION TYPE:	ARS
    PUBLIC DOCUMENT COUNT:		1
    CONFORMED PERIOD OF REPORT:	20221231
    FILED AS OF DATE:		20230424
    DATE AS OF CHANGE:		20230424
    EFFECTIVENESS DATE:		20230424

    FILER:

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

    	FILING VALUES:
    		FORM TYPE:		ARS
    		SEC ACT:		1934 Act
    		SEC FILE NUMBER:	001-39264
    		FILM NUMBER:		23840022

    	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
    </SEC-HEADER>
    <DOCUMENT>
    <TYPE>ARS
    <SEQUENCE>1
    <FILENAME>tm232000d3_ars.pdf
    <DESCRIPTION>ARS
    <TEXT>
    Document 1 - file: tm232000d3_ars.pdf

    </DOCUMENT>
    </SEC-DOCUMENT>