Sukup Manufacturing Co. is a family-owned company based in Sheffield, Iowa, founded in 1963 by Eugene and Mary Sukup. It specializes in grain storage, drying, and handling equipment, and is recognized as the largest family-owned manufacturer in this sector. The company employs around 600 people and has become one of the fastest-growing grain bin companies worldwide.

Sukup Manufacturing offers a wide range of products, including grain bins, grain dryers, material handling equipment, and pre-engineered metal buildings for agricultural and industrial use. The company is known for its innovative solutions, such as the Stirway® stirring machine, which helps prevent spoilage in stored grain. With over 80 U.S. patents, Sukup Manufacturing emphasizes advancements in grain handling technology. The company primarily serves farmers and agricultural businesses, focusing on enhancing grain production efficiency and storage reliability.