The Rineys – $3.5B
The Rineys continue to command the Scottrade empire. Rodger O. Riney was the founder and originally developed it, though it was later sold to TD Ameritrade. Born in the ‘40s, his first experience with the stock market happened when his grandparents gifted him ten shares of stock. He then went on to matriculate at the University of Missouri. After the deregulation of the brokerage industry during the ‘70s, he decided to shoot his shot by launching Scottsdale Securities, which provided trades at low commission rates. A decade later, he opened the second location in St. Louis. In 1996, the company moved onto the internet and started an online trading platform of its own. Eventually renamed Scottrade, the company has a reputation for being a good company to be employed by.

The Rineys – $3.5B