The Four Horsemen of Banking (Bank of America, JP Morgan Chase, Citigroup and Wells Fargo) own the Four Horsemen of Oil (Exxon Mobil, Royal Dutch/Shell, BP Amoco and Chevron Texaco); in tandem with Deutsche Bank, BNP, Barclays and other European old money behemoths. But their monopoly over the global economy does not end at the edge of the oil patch.
https://hendersonlefthook.wordpress.com/2015/04/30/the-federal-reserve-cartel-part-i-the-eight-families/