<SEC-DOCUMENT>0000929638-21-000374-index.html : 20210216
<SEC-HEADER>0000929638-21-000374.hdr.sgml : 20210216
<ACCEPTANCE-DATETIME>20210216151430
ACCESSION NUMBER:		0000929638-21-000374
CONFORMED SUBMISSION TYPE:	SC 13G/A
PUBLIC DOCUMENT COUNT:		1
FILED AS OF DATE:		20210216
DATE AS OF CHANGE:		20210216
GROUP MEMBERS:		BIHUA CHEN
GROUP MEMBERS:		CORMORANT GLOBAL HEALTHCARE GP, LLC
GROUP MEMBERS:		CORMORANT GLOBAL HEALTHCARE MASTER FUND, LP
GROUP MEMBERS:		CORMORANT PRIVATE HEALTHCARE FUND II, LP
GROUP MEMBERS:		CORMORANT PRIVATE HEALTHCARE GP II, LLC

SUBJECT COMPANY:	

	COMPANY DATA:	
		COMPANY CONFORMED NAME:			Cabaletta Bio, Inc.
		CENTRAL INDEX KEY:			0001759138
		STANDARD INDUSTRIAL CLASSIFICATION:	BIOLOGICAL PRODUCTS (NO DIAGNOSTIC SUBSTANCES) [2836]
		IRS NUMBER:				000000000
		STATE OF INCORPORATION:			DE
		FISCAL YEAR END:			1231

	FILING VALUES:
		FORM TYPE:		SC 13G/A
		SEC ACT:		1934 Act
		SEC FILE NUMBER:	005-91178
		FILM NUMBER:		21636893

	BUSINESS ADDRESS:	
		STREET 1:		2929 ARCH STREET
		STREET 2:		SUITE 600
		CITY:			PHILADELPHIA
		STATE:			PA
		ZIP:			19104
		BUSINESS PHONE:		(267) 759-3100

	MAIL ADDRESS:	
		STREET 1:		2929 ARCH STREET
		STREET 2:		SUITE 600
		CITY:			PHILADELPHIA
		STATE:			PA
		ZIP:			19104

FILED BY:		

	COMPANY DATA:	
		COMPANY CONFORMED NAME:			Cormorant Asset Management, LP
		CENTRAL INDEX KEY:			0001583977
		IRS NUMBER:				462108927
		STATE OF INCORPORATION:			DE
		FISCAL YEAR END:			1231

	FILING VALUES:
		FORM TYPE:		SC 13G/A

	BUSINESS ADDRESS:	
		STREET 1:		200 CLARENDON STREET
		STREET 2:		52ND FLOOR
		CITY:			BOSTON
		STATE:			MA
		ZIP:			02116
		BUSINESS PHONE:		857-702-0388

	MAIL ADDRESS:	
		STREET 1:		200 CLARENDON STREET
		STREET 2:		52ND FLOOR
		CITY:			BOSTON
		STATE:			MA
		ZIP:			02116

	FORMER COMPANY:	
		FORMER CONFORMED NAME:	Cormorant Asset Management, LLC
		DATE OF NAME CHANGE:	20130807
</SEC-HEADER>
<DOCUMENT>
<TYPE>SC 13G/A
<SEQUENCE>1
<FILENAME>sc13g.htm
<TEXT>
Document 1 - file: sc13g.htm

</DOCUMENT>
</SEC-DOCUMENT>