Exhibit 99.1

Joint Filing Agreement

The undersigned hereby agree that the Statement on the Schedule 13G filed herewith (and any amendments thereto), relating to the common stock of Codexis, Inc. is being filed jointly with the Securities and Exchange Commission pursuant to Rule 13d-1(c) under the Securities Exchange Act of 1934, as amended, on behalf of each of the undersigned.

This Agreement may be executed in counterparts and each of such counterparts taken together shall constitute one and the same instrument.

IN WITNESS WHEREOF, the undersigned hereby execute this Agreement as of February 12, 2021.

	TELEMARK ASSET MANAGEMENT, LLC

	By:	/s/ Brian C. Miley
		Name: Brian C. Miley
		Title: Chief Financial Officer


	TELEMARK FUND, LP

	By: Telemark Asset Management, LLC, investment adviser

	By:	/s/ Brian C. Miley
		Name: Brian C. Miley
		Title: Chief Financial Officer



	By:	/s/ Colin McNay
		Name: Colin McNay, in his individual capacity