Exhibit 32.1

CERTIFICATION PURSUANT TO

18 U.S.C. SECTION 1350,

AS ADOPTED PURSUANT TO

SECTION 906 OF THE SARBANES-OXLEY ACT OF 2002

In connection with the Annual Report of Codexis, Inc. (the “Company”) on Form 10-K for the fiscal year ended December 31, 2023, as filed with the Securities and Exchange Commission (the “Report”), Stephen Dilly, President and Chief Executive Officer of the Company and Sriram Ryali, Chief Financial Officer of the Company, respectively, do each hereby certify, pursuant to 18 U.S.C. Section 1350, as adopted pursuant to Section 906 of the Sarbanes-Oxley Act of 2002, that:

•The Report fully complies with the requirements of Section 13(a) or 15(d) of the Securities Exchange Act of 1934; and

•The information in the Report fairly presents, in all material respects, the financial condition and results of operations of the Company.

 

Date: February 28, 2024

 

/s/Stephen Dilly
Stephen Dilly
President and Chief Executive Officer
/s/Sriram Ryali
Sriram Ryali
Chief Financial Officer