<SEC-DOCUMENT>0001013594-25-000650-index.html : 20250514
<SEC-HEADER>0001013594-25-000650.hdr.sgml : 20250514
<ACCEPTANCE-DATETIME>20250514174952
ACCESSION NUMBER:		0001013594-25-000650
CONFORMED SUBMISSION TYPE:	SCHEDULE 13G
PUBLIC DOCUMENT COUNT:		2
FILED AS OF DATE:		20250514
DATE AS OF CHANGE:		20250514

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
		EIN:				811173868
		FISCAL YEAR END:			1231

	FILING VALUES:
		FORM TYPE:		SCHEDULE 13G
		SEC ACT:		1934 Act
		SEC FILE NUMBER:	005-91484
		FILM NUMBER:		25947417

	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

FILED BY:		

	COMPANY DATA:	
		COMPANY CONFORMED NAME:			Madison Avenue Partners, LP
		CENTRAL INDEX KEY:			0001801265
		ORGANIZATION NAME:           	
		EIN:				320567414
		STATE OF INCORPORATION:			DE
		FISCAL YEAR END:			1231

	FILING VALUES:
		FORM TYPE:		SCHEDULE 13G

	BUSINESS ADDRESS:	
		STREET 1:		150 EAST 58TH STREET
		STREET 2:		14TH FLOOR
		CITY:			NEW YORK
		STATE:			NY
		ZIP:			10155
		BUSINESS PHONE:		212-702-8644

	MAIL ADDRESS:	
		STREET 1:		150 EAST 58TH STREET
		STREET 2:		14TH FLOOR
		CITY:			NEW YORK
		STATE:			NY
		ZIP:			10155
</SEC-HEADER>
<DOCUMENT>
<TYPE>SCHEDULE 13G
<SEQUENCE>1
<FILENAME>primary_doc.xml
<TEXT>
Document 1 - file: primary_doc.html

Document 1 - RAW XML: primary_doc.xml

</DOCUMENT>
<DOCUMENT>
<TYPE>EX-99.1
<SEQUENCE>2
<FILENAME>ex99.htm
<DESCRIPTION>JOINT FILING AGREEMENT
<TEXT>
Document 2 - file: ex99.htm

</DOCUMENT>
</SEC-DOCUMENT>