X0306 4 2018-05-15 0 0001200375 CODEXIS INC CDXS 0001687664 Aldridge Michael D. C/O CODEXIS, INC. 200 PENOBSCOT DRIVE REDWOOD CITY CA 94063 0 1 0 0 See Remarks Common Stock 2018-05-15 4 M 0 22000 4.37 A 22000 D Common Stock 2018-05-15 4 S 0 22000 12.9066 D 0 D Stock Option (Right to Buy) 4.37 2018-05-15 4 M 0 22000 0.00 D 2026-10-15 Common Stock 22000 228000 D Transaction made pursuant to a 10b5-1 trading plan adopted by the Reporting Person on December 8, 2017. This transaction was executed in multiple trades in prices ranging from $12.775 to $13.125, inclusive. The price reported in Column 4 above reflects the weighted average sale price. The Reporting Person hereby undertakes to provide to the Securities and Exchange Commission staff, the Issuer, or a security holder of the Issuer, upon request, full information regarding the number of shares sold at each respective price within the range set forth in this footnote. Option vests and becomes exercisable with respect to 25% of the shares subject thereto on October 16, 2017, with 1/48th of the shares vesting monthly thereafter, such that the option will be fully vested and exercisable on October 16, 2020 contingent upon the continued employment of the Reporting Person through each such vesting date. Senior Vice President, Corporate & Strategic Development /s/ Gordon Sangster, Attorney-in-Fact for Michael D. Aldridge 2018-05-16