The Koch Family (Net Worth: $98.7 billion, Company Name: Koch Industries)
Known as the Koch brothers, Charles and David Koch manage the Koch Industries empire, leading one of the wealthiest family dynasties in the country. Apart from their business, they are also known for being staunch supporters of the Republican party.
The company’s subsidiaries involve finance, trading, and the manufacture and distribution of petroleum, fertilizers, and paper to name a few. There have long been tensions regarding whether the company should be publicly traded, but the Koch brothers have managed to keep the company under their control.