OK便利店
Since the 1980s, Circle K has been the largest chain of company-owned and operated (non-franchised) convenience stores in the United States. With 7,230 stores overall in the United States, Circle K is second to 7-Eleven's 9,348 stores (as of July 2019). As of February 2020, there are more than 14,800 stores with the Circle K brand worldwide.