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 soybean oil to the food, biodiesel, and chemical industries; and soybean hulls. In addition, the company provides contracting services for the construction and management of oilseed processing plants. The company was founded in 1993 and is based in Volga, South Dakota.