10Edward Johnson, III - $9.3 Billiion
Pretty much everyone has heard of Fidelity investments, and Edward Johnson III is responsible for running this company (with some help from his daughter). Fidelity Investments was started by Johnson's father, and he worked his way up in that company from an
entry level research analyst position all the way up to president of the entire company.
Without Johnson we may not have the discount brokerage market that we have today. He pioneered this discount brokerage market and brought it to smaller investors, banks, insurance companies, and more. Now Fidelity Investments is one of the biggest and most accessible discount brokerage firms in the world, and Edward Johnson III is a man of considerable wealth.