POET LLC is a U.S. biofuel company that specializes in the creation of bioethanol. The privately held corporation, which was originally called Broin Companies, is headquartered in Sioux Falls, South Dakota. In 2007, the Renewable Fuels Association named POET the largest U.S. ethanol producer, creating 1.1 billion US gallons (4,200,000 m3) of fuel per year. Currently, POET produces 1.7 billion gallons of ethanol per year. POET operates 27 ethanol plants spread across Indiana, Iowa, Michigan, Missouri, Ohio, Minnesota, and South Dakota. In 2007, the company received a US$80 million grant from the U.S. Department of Energy for the creation of a cellulosic ethanol production facility in Emmetsburg, Iowa. A grand opening was held for the facility on September 3rd, 2014. It is expected to produce 25 million gallons of ethanol per year from corncobs, leaves and husks provided by farmers in and around the area. POET has also collaborated with other companies, including Deere & Co. and Vermeer Company, to develop manufacturing equipment for harvesting corn cobs used in ethanol production. Among its products in the process are distillers grains branded Dakota Gold, Inviz, and Voila.