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Filing Details

Issuer

Cik	Name	Symbol	Sector (SIC)	IRS No
1042074	Cymabay Therapeutics Inc.	CBAY	Pharmaceutical Preparations (2834)	943103561

Insiders

Cik	Name	Reported Address	Insider Title	Director	Officer	Large Shareholder	Other
1252524	Von Kurt Emster	C/O Cymabay Therapeutics, Inc. 7999 Gateway Blvd, Suite 130 Cambridge MA 02139		Yes	No	No	No

Reported Non-Derivative Transactions

Sec. Name	Acquisiton - Disposition	Date	Amount	Price	Remaning Holdings	Equity Swap Involved	Form Type	Code	Nature of Ownership	Explanation
Common Stock	Disposition	2017-11-10	50,048	$9.26	1,166,423	No	4	S	Indirect	See Footnote

Equity Swap Involved	Form Type	Code	Nature of Ownership	Explanation
No	4	S	Indirect	See Footnote

Reported Non-Derivative Holdings

Sec. Name	Remaning Holdings	Nature of Ownership	Explanation
Common Stock	90,000	Direct
Common Stock	17,236	Indirect	By the Konrad Hans von Emster III and Elizabeth F. von Emster Revocable Trust dated January 18, 2005

Footnotes

The sales reported in this Form 4 were effected pursuant to a Rule 10b5-1 trading plan adopted by Abingworth Bioventures VI, LP ("ABV VI") and Abingworth BioEquities Master Fund Limited ("ABE") on September 29, 2017.
The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $9.25 to $9.30 per share, inclusive. Kurt von Emster (the "Reporting Person") undertakes to provide to CymaBay Therapeutics, Inc. ("CymaBay"), any security holder of CymaBay, or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares purchased at each separate price within the ranges set forth herein.
Shares are held by ABV VI and ABE, (ABE together with ABV VI, the "Abingworth Funds"). Abingworth LLP ("Abingworth") is the investment manager of the Abingworth Funds and has been delegated with all investment and dispositive power over the securities held by the Abingworth Funds. The Reporting Person is a member of the investment committee of Abingworth, which approves investment and voting decisions by a majority vote, and no individual member has the sole control or voting power over the shares held by Abingworth. The Reporting Person disclaims beneficial ownership of such shares, except to the extent of his pecuniary interest therein.