<SEC-DOCUMENT>0001193805-18-000073-index.html : 20180129
<SEC-HEADER>0001193805-18-000073.hdr.sgml : 20180129
<ACCEPTANCE-DATETIME>20180129144949
ACCESSION NUMBER:		0001193805-18-000073
CONFORMED SUBMISSION TYPE:	SC 13G/A
PUBLIC DOCUMENT COUNT:		1
FILED AS OF DATE:		20180129
DATE AS OF CHANGE:		20180129
GROUP MEMBERS:		DEERFIELD MANAGEMENT COMPANY, L.P.
GROUP MEMBERS:		DEERFIELD MGMT III, L.P.
GROUP MEMBERS:		DEERFIELD MGMT, L.P.
GROUP MEMBERS:		DEERFIELD PRIVATE DESIGN FUND III, L.P.
GROUP MEMBERS:		DEERFIELD SPECIAL SITUATIONS FUND, L.P.

SUBJECT COMPANY:	

	COMPANY DATA:	
		COMPANY CONFORMED NAME:			SYNLOGIC, INC.
		CENTRAL INDEX KEY:			0001527599
		STANDARD INDUSTRIAL CLASSIFICATION:	PHARMACEUTICAL PREPARATIONS [2834]
		IRS NUMBER:				261824804
		STATE OF INCORPORATION:			DE
		FISCAL YEAR END:			1231

	FILING VALUES:
		FORM TYPE:		SC 13G/A
		SEC ACT:		1934 Act
		SEC FILE NUMBER:	005-89131
		FILM NUMBER:		18555086

	BUSINESS ADDRESS:	
		STREET 1:		200 SIDNEY STREET
		STREET 2:		SUITE 320
		CITY:			CAMBRIDGE
		STATE:			MA
		ZIP:			02139
		BUSINESS PHONE:		617-401-9975

	MAIL ADDRESS:	
		STREET 1:		200 SIDNEY STREET
		STREET 2:		SUITE 320
		CITY:			CAMBRIDGE
		STATE:			MA
		ZIP:			02139

	FORMER COMPANY:	
		FORMER CONFORMED NAME:	Mirna Therapeutics, Inc.
		DATE OF NAME CHANGE:	20110809

FILED BY:		

	COMPANY DATA:	
		COMPANY CONFORMED NAME:			Flynn James E
		CENTRAL INDEX KEY:			0001352546

	FILING VALUES:
		FORM TYPE:		SC 13G/A

	MAIL ADDRESS:	
		STREET 1:		780 THIRD AVENUE
		STREET 2:		37TH FLOOR
		CITY:			NEW YORK
		STATE:			NY
		ZIP:			10017
</SEC-HEADER>
<DOCUMENT>
<TYPE>SC 13G/A
<SEQUENCE>1
<FILENAME>e617606_sc13ga-synolgic.htm
<TEXT>
Document 1 - file: e617606_sc13ga-synolgic.htm

</DOCUMENT>
</SEC-DOCUMENT>