The Kochs – $98.7B
The mighty empire is now headed by Charles and David Koch, who are collectively known as the Kock Brothers. They are known not only for handing one of the biggest family empires in the country, but also for their generous support of the Republican party. Although they were pressured to turn the company public, the Kochs have fought long and hard to keep all of the shares within the family. The original patriarch of the family was a chemical engineer by the name of Fred Koch. He launched an oil refinery firm that was the predecessor of Koch Industries. Headquartered in Wichita, Kansas, the company employs more than 120,000 workers across just about every single continent in the world.

The Kochs – $98.7B