National Stock Yards Co. (NSYC) operates the largest live auction cattle stockyards in the United States, located in Oklahoma City, Oklahoma, where it facilitates the sale of over 450,000 head of cattle annually through auction and distribution services for livestock products including cattle, hogs, and sheep; the company also leases commercial land, buildings, and office space within its approximately 100-acre Exchange Building complex and owns roughly 75 acres of vacant land in a prime opportunity zone in southwest Illinois across from St. Louis. Founded on October 3, 1910, and headquartered in Oklahoma City, NSYC serves livestock producers, buyers, and related agribusinesses primarily in the U.S. Midwest and Southern regions with a focus on cattle merchandising and real estate leasing in key stockyard areas. In April 2025, the Oklahoma National Stockyards, central to NSYC's operations, entered into a purchase contract with a group led by Oklahoma cattleman and business owner Chris Franklin, ensuring continuity of livestock auction activities, strengthened partnerships with organizations such as the Oklahoma Cattlemen's Association and Farm Bureau, and long-term commitment to the national agricultural marketplace.