<SEC-DOCUMENT>0001193125-20-180810-index.html : 20200626
<SEC-HEADER>0001193125-20-180810.hdr.sgml : 20200626
<ACCEPTANCE-DATETIME>20200626152703
ACCESSION NUMBER:		0001193125-20-180810
CONFORMED SUBMISSION TYPE:	SC 13D/A
PUBLIC DOCUMENT COUNT:		2
FILED AS OF DATE:		20200626
DATE AS OF CHANGE:		20200626
GROUP MEMBERS:		ANSBERT GADICKE
GROUP MEMBERS:		LUKE EVNIN
GROUP MEMBERS:		MPM ASSET MANAGEMENT INVESTORS BV5 LLC
GROUP MEMBERS:		MPM BIOVENTURES V GP LLC
GROUP MEMBERS:		MPM BIOVENTURES V LLC
GROUP MEMBERS:		TODD FOLEY

SUBJECT COMPANY:	

	COMPANY DATA:	
		COMPANY CONFORMED NAME:			RHYTHM PHARMACEUTICALS, INC.
		CENTRAL INDEX KEY:			0001649904
		STANDARD INDUSTRIAL CLASSIFICATION:	PHARMACEUTICAL PREPARATIONS [2834]
		IRS NUMBER:				462159271
		STATE OF INCORPORATION:			DE
		FISCAL YEAR END:			1231

	FILING VALUES:
		FORM TYPE:		SC 13D/A
		SEC ACT:		1934 Act
		SEC FILE NUMBER:	005-90134
		FILM NUMBER:		20993774

	BUSINESS ADDRESS:	
		STREET 1:		222 BERKELEY STREET
		STREET 2:		12TH FLOOR
		CITY:			BOSTON
		STATE:			MA
		ZIP:			02116
		BUSINESS PHONE:		857-264-4280

	MAIL ADDRESS:	
		STREET 1:		222 BERKELEY STREET
		STREET 2:		12TH FLOOR
		CITY:			BOSTON
		STATE:			MA
		ZIP:			02116

	FORMER COMPANY:	
		FORMER CONFORMED NAME:	RHYTHM METABOLIC, INC.
		DATE OF NAME CHANGE:	20150803

FILED BY:		

	COMPANY DATA:	
		COMPANY CONFORMED NAME:			MPM BIOVENTURES V, L.P.
		CENTRAL INDEX KEY:			0001482716
		IRS NUMBER:				270793842
		STATE OF INCORPORATION:			DE
		FISCAL YEAR END:			1231

	FILING VALUES:
		FORM TYPE:		SC 13D/A

	BUSINESS ADDRESS:	
		STREET 1:		MPM ASSET MANAGEMENT
		STREET 2:		200 CLARENDON STREET, 54TH FLOOR
		CITY:			BOSTON
		STATE:			MA
		ZIP:			02116
		BUSINESS PHONE:		(617) 425-9200

	MAIL ADDRESS:	
		STREET 1:		MPM ASSET MANAGEMENT
		STREET 2:		200 CLARENDON STREET, 54TH FLOOR
		CITY:			BOSTON
		STATE:			MA
		ZIP:			02116
</SEC-HEADER>
<DOCUMENT>
<TYPE>SC 13D/A
<SEQUENCE>1
<FILENAME>d30359dsc13da.htm
<DESCRIPTION>SC 13D/A
<TEXT>
Document 1 - file: d30359dsc13da.htm

</DOCUMENT>
<DOCUMENT>
<TYPE>EX-99.A
<SEQUENCE>2
<FILENAME>d30359dex99a.htm
<DESCRIPTION>EX-99.A
<TEXT>
Document 2 - file: d30359dex99a.htm

</DOCUMENT>
</SEC-DOCUMENT>