<SEC-DOCUMENT>0000950170-25-011356-index.html : 20250130
<SEC-HEADER>0000950170-25-011356.hdr.sgml : 20250130
<ACCEPTANCE-DATETIME>20250130213226
ACCESSION NUMBER:		0000950170-25-011356
CONFORMED SUBMISSION TYPE:	3
PUBLIC DOCUMENT COUNT:		2
CONFORMED PERIOD OF REPORT:	20250130
FILED AS OF DATE:		20250130
DATE AS OF CHANGE:		20250130

REPORTING-OWNER:	

	OWNER DATA:	
		COMPANY CONFORMED NAME:			MEANWELL CLIVE
		CENTRAL INDEX KEY:			0001204787
		ORGANIZATION NAME:           	

	FILING VALUES:
		FORM TYPE:		3
		SEC ACT:		1934 Act
		SEC FILE NUMBER:	001-42489
		FILM NUMBER:		25575543

	MAIL ADDRESS:	
		STREET 1:		THE MEDICINES CO
		STREET 2:		8 SYLVAN WAY
		CITY:			PARSIPPANY
		STATE:			NJ
		ZIP:			07054

ISSUER:		

	COMPANY DATA:	
		COMPANY CONFORMED NAME:			Metsera, Inc.
		CENTRAL INDEX KEY:			0002040807
		STANDARD INDUSTRIAL CLASSIFICATION:	PHARMACEUTICAL PREPARATIONS [2834]
		ORGANIZATION NAME:           	03 Life Sciences
		IRS NUMBER:				000000000
		STATE OF INCORPORATION:			DE
		FISCAL YEAR END:			1231

	BUSINESS ADDRESS:	
		STREET 1:		3 WORLD TRADE CENTER
		STREET 2:		175 GREENWICH STREET
		CITY:			NEW YORK
		STATE:			NY
		ZIP:			10007
		BUSINESS PHONE:		(212) 784-6595

	MAIL ADDRESS:	
		STREET 1:		3 WORLD TRADE CENTER
		STREET 2:		175 GREENWICH STREET
		CITY:			NEW YORK
		STATE:			NY
		ZIP:			10007
</SEC-HEADER>
<DOCUMENT>
<TYPE>3
<SEQUENCE>1
<FILENAME>ownership.xml
<DESCRIPTION>3
<TEXT>
Document 1 - file: ownership.html

Document 1 - RAW XML: ownership.xml

</DOCUMENT>
<DOCUMENT>
<TYPE>EX-24.1
<SEQUENCE>2
<FILENAME>ck0002040807-ex24_1.htm
<DESCRIPTION>EX-24.1
<TEXT>
Document 2 - file: ck0002040807-ex24_1.htm

</DOCUMENT>
</SEC-DOCUMENT>