EXPLANATORY NOTE
CymaBay Therapeutics, Inc. (the “Registrant” or the “Company”) is filing this Post-Effective Amendment No. 1 to the Registrant’s registration statements on Form S-8 (File Nos. 333-195211, 333-198289, 333-202941, 333-210453, 333-216905, 333-223687, 333-226741, 333-229953, 333-254697, 333-263644, 333-270795), as filed with the Securities and Exchange Commission on April 11, 2014, August 21, 2014, March 23, 2015, March 29, 2016, March 23, 2017, March 15, 2018, August 9, 2018, February 28, 2019, March 25, 2021, March 17, 2022, and March 23, 2023, respectively (collectively, the “Prior Registration Statements,” and these post-effective amendments to the Prior Registration Statements, collectively, the “Post-Effective Amendments”). Pursuant to the Prior Registration Statements, shares of common stock, par value $0.0001 per share, of the Registrant (the “Common Stock”) were registered for issuance under the CymaBay Therapeutics, Inc. 2013 Equity Incentive Plan (the “Prior Plan”). Pursuant to the terms of the CymaBay Therapeutics, Inc. 2023 Equity Incentive Plan (the “2023 Plan”), from and after June 1, 2023, any shares of Common Stock subject to outstanding stock awards granted under the Prior Plan that (A) are not issued because such stock award or any portion thereof expires or otherwise terminates without all of the shares covered by such stock award having been issued; (B) are not issued because such stock award or any portion thereof is settled in cash; (C) are forfeited back to or repurchased by the Company because of the failure to meet a contingency or condition required for the vesting of such shares; (D) are withheld or reacquired to satisfy the exercise, strike or purchase price; or (E) are withheld or reacquired to satisfy a tax withholding obligation (the shares of Common Stock set forth in (A), (B), (C), (D) and (E) above, collectively, the “Prior Plan Returning Shares”) will immediately be added to the share reserve of the 2023 Plan as and when such shares become Prior Plan Returning Shares and become available for issuance pursuant to awards granted under the 2023 Plan.
In accordance with Item 512(a)(1)(iii) of Regulation S-K and Securities Act Forms Compliance and Disclosure Interpretation Question 126.43, these Post-Effective Amendments are hereby filed to provide that the Prior Registration Statements will also cover the issuance of the Prior Plan Returning Shares under the 2023 Plan as and when such shares become Prior Plan Returning Shares and become available for issuance pursuant to awards granted under the 2023 Plan.
PART II
INFORMATION REQUIRED IN THE REGISTRATION STATEMENT
Item 3. Incorporation of Documents by Reference.
The following documents filed by the Registrant with the SEC are incorporated by reference into this Registration Statement:
(a) The Registrant’s Annual Report on Form 10-K for the fiscal year ended December 31, 2022, filed with the SEC on March 23, 2023;
(b) The Registrant’s Quarterly Report on Form 10-Q for the fiscal quarter ended March 31, 2023, filed with the SEC on May 15, 2023;
(c) The Registrant’s Quarterly Report on Form 10-Q for the fiscal quarter ended June 30, 2023, filed with the SEC on August 10, 2023;
(d) The Registrant’s Current Reports on Form 8-K filed with the SEC on January 9, 2023, January 23, 2023, January 25, 2023, February 23, 2023, May 9, 2023 and June 6, 2023;
(e) The description of the Registrant’s Common Stock that is contained in a registration statement on Form 8-A filed with the SEC on June 16, 2014, including any amendment or report filed for the purpose of updating such description, including Exhibit 4.2 to the Registrant’s Annual Report on Form 10-K for the fiscal year ended December 31, 2020 filed with the SEC on March 25, 2021; and