AMES, Iowa, June 14, 2017 (GLOBE NEWSWIRE) -- Renewable Energy Group, Inc. (NASDAQ:REGI) today announced that its Chief Executive Officer, Daniel J. Oh; Chief Financial Officer, Chad Stone; and Treasurer, Todd Robinson will participate in the 3rd Annual ROTH Cleantech & Industrial Growth 1x1 Event on June 21, 2017 at the Dorchester Hotel in London, U.K.