<SEC-DOCUMENT>0001193125-18-042543-index.html : 20180213
<SEC-HEADER>0001193125-18-042543.hdr.sgml : 20180213
<ACCEPTANCE-DATETIME>20180213161513
ACCESSION NUMBER:		0001193125-18-042543
CONFORMED SUBMISSION TYPE:	SC 13G
PUBLIC DOCUMENT COUNT:		1
FILED AS OF DATE:		20180213
DATE AS OF CHANGE:		20180213
GROUP MEMBERS:		KEVIN STARR
GROUP MEMBERS:		MARK LEVIN
GROUP MEMBERS:		ROBERT I. TEPPER
GROUP MEMBERS:		THIRD ROCK VENTURES GP, L.P.
GROUP MEMBERS:		TRV GP, LLC

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 13G
		SEC ACT:		1934 Act
		SEC FILE NUMBER:	005-90134
		FILM NUMBER:		18603502

	BUSINESS ADDRESS:	
		STREET 1:		500 BOYLSTON STREET
		STREET 2:		11TH FLOOR
		CITY:			BOSTON
		STATE:			MA
		ZIP:			02116
		BUSINESS PHONE:		857-264-4280

	MAIL ADDRESS:	
		STREET 1:		500 BOYLSTON STREET
		STREET 2:		11TH 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:			THIRD ROCK VENTURES LP
		CENTRAL INDEX KEY:			0001408591
		IRS NUMBER:				000000000
		STATE OF INCORPORATION:			DE

	FILING VALUES:
		FORM TYPE:		SC 13G

	BUSINESS ADDRESS:	
		STREET 1:		29 NEWBURY STREET
		STREET 2:		SUITE 401
		CITY:			BOSTON
		STATE:			MA
		ZIP:			02116
		BUSINESS PHONE:		617-859-3099

	MAIL ADDRESS:	
		STREET 1:		29 NEWBURY STREET
		STREET 2:		SUITE 401
		CITY:			BOSTON
		STATE:			MA
		ZIP:			02116
</SEC-HEADER>
<DOCUMENT>
<TYPE>SC 13G
<SEQUENCE>1
<FILENAME>d478132dsc13g.htm
<DESCRIPTION>SC 13G
<TEXT>
Document 1 - file: d478132dsc13g.htm

</DOCUMENT>
</SEC-DOCUMENT>