16/07/2022
Koch Brothers – $90 billion
The Koch Brothers, Charles and David, currently own most of the second largest privately held company in the United States, Koch Industries. Built by their father, Fred Koch, who developed an innovative way to refine oil into gasoline in the ‘20s, the company is the most important source of their wealth. The brothers have used to massive wealth most notably on the political scene, where they very publicly provide funding for various mostly conservative causes, but have also bankrolled many charitable causes (David Koch, a cancer survivor, has given hundreds of millions to cancer research).