St. Louis-based Benson Hill last week announced the purchase of a soybean processing facility in Creston, adding a second plant to its holdings and increasing processing capacity for its proprietary ultra-high protein soybean products.

The southwest Iowa soy plant, which was built in 1998 and purchased by ZFS Creston in 2018, is certified for non-GMO production and has built a base of seasoned non-GMO soybean...