Based in Tucson, Ariz., Circle K Stores Inc. is one of the leading operators of convenience stores in North America. The company has been operational for more than 50 years, offering a wide range of products, such as Premium Circle K Coffee, ThirstBuster fountain drinks, beer, snacks, candy, ATMs, Talk And Go Mobile prepaid wireless phones, Gift Cards, money orders and general merchandise. In addition, Circle K Stores Inc. sell branded fuels, including Shell, BP, 76, Citgo and Chevron.