Exhibit 99.1

Joint Filing Agreement

The undersigned hereby agree that the Statement on 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 Novemebr 20, 2017.
 

 
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