<SEC-DOCUMENT>0000950170-24-106106-index.html : 20240912
<SEC-HEADER>0000950170-24-106106.hdr.sgml : 20240912
<ACCEPTANCE-DATETIME>20240912192759
ACCESSION NUMBER:		0000950170-24-106106
CONFORMED SUBMISSION TYPE:	3
PUBLIC DOCUMENT COUNT:		2
CONFORMED PERIOD OF REPORT:	20240912
FILED AS OF DATE:		20240912
DATE AS OF CHANGE:		20240912

REPORTING-OWNER:	

	OWNER DATA:	
		COMPANY CONFORMED NAME:			Florence Anthony A. Jr.
		CENTRAL INDEX KEY:			0001559827
		ORGANIZATION NAME:           	

	FILING VALUES:
		FORM TYPE:		3
		SEC ACT:		1934 Act
		SEC FILE NUMBER:	001-42272
		FILM NUMBER:		241296102

	MAIL ADDRESS:	
		STREET 1:		5425 WISCONSIN AVENUE, SUITE 800
		CITY:			CHEVY CHASE
		STATE:			MD
		ZIP:			20815

ISSUER:		

	COMPANY DATA:	
		COMPANY CONFORMED NAME:			MBX Biosciences, Inc.
		CENTRAL INDEX KEY:			0001776111
		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:		12406 HORESHAM STREET
		CITY:			CARMEL
		STATE:			IN
		ZIP:			46032
		BUSINESS PHONE:		3179893100

	MAIL ADDRESS:	
		STREET 1:		12406 HORESHAM STREET
		CITY:			CARMEL
		STATE:			IN
		ZIP:			46032
</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.POA
<SEQUENCE>2
<FILENAME>mbx-ex24_poa.htm
<DESCRIPTION>EX-24.POA
<TEXT>
Document 2 - file: mbx-ex24_poa.htm

</DOCUMENT>
</SEC-DOCUMENT>