The (Edward) Johnson Family – $38.7 Billion

Back in 1946, Edward C. Johnson founded the world’s second-largest mutual fund company, Fidelity. What’s more, the company has been run at the hands of three Johnson generations since. Not only that, but they have also managed to become one of America’s richest families with an impressive net worth of $38.7 billion.

The company is currently helmed by Edward’s granddaughter, Abigail Johnson. What’s more, the family currently owns about forty-nine percent of the company, which is shared among four members. Meanwhile, his son, Edward Ned Johnson III, ran the company from 1977 until 2014 and remains chairman of the board.