<SEC-DOCUMENT>0001776111-19-000001-index.html : 20190510
<SEC-HEADER>0001776111-19-000001.hdr.sgml : 20190510
<ACCEPTANCE-DATETIME>20190510142815
ACCESSION NUMBER:		0001776111-19-000001
CONFORMED SUBMISSION TYPE:	D
PUBLIC DOCUMENT COUNT:		1
ITEM INFORMATION:		<ITEMS>06b
FILED AS OF DATE:		20190510
DATE AS OF CHANGE:		20190510
EFFECTIVENESS DATE:		20190510

FILER:

	COMPANY DATA:	
		COMPANY CONFORMED NAME:			MBX Biosciences, Inc.
		CENTRAL INDEX KEY:			0001776111
		IRS NUMBER:				000000000
		STATE OF INCORPORATION:			DE
		FISCAL YEAR END:			1231

	FILING VALUES:
		FORM TYPE:		D
		SEC ACT:		1933 Act
		SEC FILE NUMBER:	021-339344
		FILM NUMBER:		19814276

	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>D
<SEQUENCE>1
<FILENAME>primary_doc.xml
<TEXT>
Document 1 - file: primary_doc.html

Document 1 - RAW XML: primary_doc.xml

</DOCUMENT>
</SEC-DOCUMENT>