Established in 2002 and headquartered in Mason City, Iowa, Golden Grain Energy, LLC operates across the continental United States as a prominent manufacturer and purveyor of bioethanol, distiller grains, and corn oil. The company primarily supplies its ethanol output to petroleum terminals. Its comprehensive range of distiller grain products, which includes both modified/wet forms and distillers dried grains with solubles, caters to the nutritional requirements of the dairy and beef industries.