X0407 4 2023-04-13 0001042074 CymaBay Therapeutics, Inc. CBAY 0001456750 KIM DENNIS D C/O CYMABAY THERAPEUTICS, INC. 7575 GATEWAY BLVD., SUITE 110 NEWARK CA 94560 0 1 0 0 Chief Medical Officer 0 Common Stock 2023-04-13 4 M 0 7781 4.37 A 27781 D Common Stock 2023-04-13 4 S 0 7781 8.9809 D 20000 D Common Stock 2023-04-17 4 M 0 112219 4.37 A 132219 D Common Stock 2023-04-17 4 S 0 112219 9.5397 D 20000 D Employee Stock Option (right to buy) 4.37 2023-04-13 4 M 0 7781 0 D 2031-05-16 Common Stock 7781 282119 D Employee Stock Option (right to buy) 4.37 2023-04-17 4 M 0 112219 0 D 2031-05-16 Common Stock 112219 169900 D The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $8.98 to $8.985, inclusive. The reporting person undertakes to provide to CymaBay Therapeutics, Inc., any security holder of CymaBay Therapeutics, Inc., or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price within the range set forth in this footnote. The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $9.30 to $9.80, inclusive. The reporting person undertakes to provide to CymaBay Therapeutics, Inc., any security holder of CymaBay Therapeutics, Inc., or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price within the range set forth in this footnote. The original option grant vested as to 1/4 of the underlying shares on May 17, 2022 and vests as to 1/48 of the underlying shares monthly thereafter. /s/ Paul Quinlan, as attorney-in-fact for Dennis D. Kim 2023-04-17