The Koch family is behind Koch Industries, the second largest private company (around $100 billion in sales) in the US. Charles and David, two of the four siblings have worked really hard to grow the business.
These two rank among the country’s top 10 richest individuals. Today Wichita-based Koch Industries is a multinational corporation, with subsidiaries involved in manufacturing, trading and investments.
The Walton family is the richest family in the US. It controls Walmart, the largest retailer in the world. Walmart has come a long way since it was founded by Sam Walton and his brother James in a small town in 1962.
Today, together, six members of the Walton family own around 54 percent of the retail giant. Various controversies (like Mexican bribery scandal and employee payment issues) have not impacted Walmart’s sales. It generated $486 billion in revenue in fiscal year 2015.