Mellon Financial
Gulf Oil was a major global oil company from 1901 until March 15, 1985. The eighth-largest American manufacturing company in 1941 and the ninth-largest in 1979, Gulf Oil was one of the so-called Seven Sisters oil companies. Prior to its merger with Standard Oil of California, Gulf was one of the chief instruments of the Mellon family fortune; both Gulf and Mellon Financial had their headquarters in Pittsburgh.