Exhibit II

to

Schedule 13G

Joint Filing Agreement

The undersigned persons agree and consent to the joint filing on their behalf of this Schedule 13G dated February 10, 2012 in connection with their beneficial ownership of Renewable Enery Group Inc. Each of Columbia Small Cap Value Fund II and Columbia Management Investment Advisers, LLC authorizes Ameriprise Financial, Inc. to execute the Schedule 13G to which this Exhibit is attached and make any necessary amendments thereto.

Ameriprise Financial, Inc.
By:	/s/     Wade M. Voigt
	Wade M. Voigt Vice President – Fund Administration -Financial Reporting
Columbia Management Investment Advisers, LLC
By:	/s/     Amy Johnson
	Amy Johnson Chief Operating Officer
Columbia Small Cap Value Fund II
By:	/s/     Scott R. Plummer
	Scott R. Plummer Senior Vice President, Secretary and Chief Legal Officer