In 2001, Bartlesville, Okla.-based Phillips Petroleum Co. closed on its acquisition of Stamford, Conn.-based refiner-marketer Tosco Corp. for $7.49 billion in a deal that included the Circle K c-store chain.

Tosco’s retail system included approximately 6,308 retail marketing locations operating under the BP, ExxonMobil, 76 and Circle K brands. Tosco originally acquired Circle K in 1996 from The Circle K Corp. for $710 million. In 2002, Phillips merged with Conoco to form ConocoPhillips.
*Includes refinery