Green Plains Inc. is an American company based in Omaha, Nebraska that was founded in 2004. The company claims to be the fourth largest ethanol fuel producer in North America. It was reported in early 2012 that the company ships approximately one billion gallons of ethanol per year. The company employs approximately 640 people, and was founded by Barry Ellsworth. Green Plains Inc. is listed on the NASDAQ Stock Exchange as GPRE.