Exhibit 4.12

SCHEDULE OF WARRANTS ISSUED BY REG TO MEMBERS OF THE FORMER BOARD OF MANAGERS AND EXECUTIVE OFFICERS OF BLACKHAWK.

Date Issued	Warrant Holder	Number of Shares of  REG Common Stock		Exercise Prices		Expiration Date
February 26, 2010	Gary Bocker		22,395	$	2.23264		June 8, 2011
February 26, 2010	Jon Rosenstiel		22,395	$	2.23264		June 8, 2011
February 26, 2010	Karl Lawfer		22,395	$	2.23264		June 8, 2011
February 26, 2010	Marvin Wurster		22,395	$	2.23264		June 8, 2011
February 26, 2010	Quentin Davis		22,395	$	2.23264		June 8, 2011
February 26, 2010	Ronald Fluegel		22,395	$	2.23264		June 8, 2011
February 26, 2010	Ronald Mapes		22,395	$	2.23264		June 8, 2011
February 26, 2010	Terry Sweitzer		22,395	$	2.23264		June 8, 2011
February 26, 2010	Brad Smith		22,395	$	2.23264		June 8, 2011
February 26, 2010	Criss Davis		22,395	$	2.23264		June 8, 2011
February 26, 2010	David Shockey		22,395	$	2.23264		June 8, 2011
February 26, 2010	Dennis Hamilton		22,395	$	2.23264		June 8, 2011
February 26, 2010	Dennis Wilke		22,395	$	2.23264		June 8, 2011
February 26, 2010	Ebenezer Management, LLC		44,790	$	4.46528		February 25, 2017