South Dakota Soybean Processors, LLC owns and operates a soybean processing plant and a soybean oil refinery in the United States and Canada. It markets and sells soybean meal primarily to resellers, feed mills, and livestock producers as livestock feed; crude and refined soybean oil to the food, biodiesel, and chemical industries; and soybean hulls. The company was founded in 1993 and is based in Volga, South Dakota.