<SEC-DOCUMENT>0000905718-19-000089-index.html : 20190131
<SEC-HEADER>0000905718-19-000089.hdr.sgml : 20190131
<ACCEPTANCE-DATETIME>20190131170443
ACCESSION NUMBER:		0000905718-19-000089
CONFORMED SUBMISSION TYPE:	4
PUBLIC DOCUMENT COUNT:		1
CONFORMED PERIOD OF REPORT:	20190129
FILED AS OF DATE:		20190131
DATE AS OF CHANGE:		20190131

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:		19556596

	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:		7575 GATEWAY BOULEVARD
		STREET 2:		SUITE 110
		CITY:			NEWARK
		STATE:			CA
		ZIP:			94560
		BUSINESS PHONE:		510-293-8800

	MAIL ADDRESS:	
		STREET 1:		7575 GATEWAY BOULEVARD
		STREET 2:		SUITE 110
		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>ownership.xml
<TEXT>
Document 1 - file: ownership.html

Document 1 - RAW XML: ownership.xml

</DOCUMENT>
</SEC-DOCUMENT>