<SEC-DOCUMENT>0000905718-17-000853-index.html : 20171002
<SEC-HEADER>0000905718-17-000853.hdr.sgml : 20171002
<ACCEPTANCE-DATETIME>20171002172011
ACCESSION NUMBER:		0000905718-17-000853
CONFORMED SUBMISSION TYPE:	4
PUBLIC DOCUMENT COUNT:		2
CONFORMED PERIOD OF REPORT:	20170928
FILED AS OF DATE:		20171002
DATE AS OF CHANGE:		20171002

REPORTING-OWNER:	

	OWNER DATA:	
		COMPANY CONFORMED NAME:			EMSTER KURT VON
		CENTRAL INDEX KEY:			0001252524

	FILING VALUES:
		FORM TYPE:		4
		SEC ACT:		1934 Act
		SEC FILE NUMBER:	001-36500
		FILM NUMBER:		171115379

	MAIL ADDRESS:	
		STREET 1:		601 GATEWAY BOULEVARD
		STREET 2:		SUITE 350
		CITY:			SAN FRANCISCO
		STATE:			CA
		ZIP:			94080

ISSUER:		

	COMPANY DATA:	
		COMPANY CONFORMED NAME:			CymaBay Therapeutics, Inc.
		CENTRAL INDEX KEY:			0001042074
		STANDARD INDUSTRIAL CLASSIFICATION:	PHARMACEUTICAL PREPARATIONS [2834]
		IRS NUMBER:				943103561
		STATE OF INCORPORATION:			DE
		FISCAL YEAR END:			1231

	BUSINESS ADDRESS:	
		STREET 1:		7999 GATEWAY BLVD
		STREET 2:		SUITE 130
		CITY:			NEWARK
		STATE:			CA
		ZIP:			94560
		BUSINESS PHONE:		510-293-8800

	MAIL ADDRESS:	
		STREET 1:		7999 GATEWAY BLVD
		STREET 2:		SUITE 130
		CITY:			NEWARK
		STATE:			CA
		ZIP:			94560

	FORMER COMPANY:	
		FORMER CONFORMED NAME:	METABOLEX, INC.
		DATE OF NAME CHANGE:	20090721

	FORMER COMPANY:	
		FORMER CONFORMED NAME:	METABOLEX INC
		DATE OF NAME CHANGE:	19970710
</SEC-HEADER>
<DOCUMENT>
<TYPE>4
<SEQUENCE>1
<FILENAME>cymabaytherafm4_10217.xml
<DESCRIPTION>OWNERSHIP DOCUMENT
<TEXT>
Document 1 - file: cymabaytherafm4_10217.html

Document 1 - RAW XML: cymabaytherafm4_10217.xml

</DOCUMENT>
<DOCUMENT>
<TYPE>EX-99
<SEQUENCE>2
<FILENAME>vonemster_poaoct2017.htm
<DESCRIPTION>KURT VON EMSTER POWER OF ATTORNEY
<TEXT>
Document 2 - file: vonemster_poaoct2017.htm

</DOCUMENT>
</SEC-DOCUMENT>