No. 2 Phillips Petroleum Acquires Tosco
In 2001, Bartlesville, Okla.-based Phillips Petroleum Co. closed on its acquisition of Stamford, Conn.-based refiner-marketer Tosco Corp. for $7.49 billion
No. 5 Couche-Tard Acquires CST Brands
In 2017, Alimentation Couche-Tard acquired CST Brands Inc., San Antonio, with 1,300 stores in the United States and Canada, for $4.43 billion.