Casey's Retail Company is a chain of convenience stores in the Midwestern and Southern United States. The company is headquartered in Ankeny, Iowa, a suburb of Des Moines. As of October 1, 2023, Casey's had 2,500 stores in 16 states. From Wikipedia
The winners, nicknamed 'Blessed,' purchased their ticket in Cortland, Illinois, and plan to use the prize for charitable efforts.