James Simons and Kenneth Griffin were the world’s top two hedge fund managers in 2015. Each made $1.7 billion last year alone, and have used their massive wealth to bankroll the campaigns of Hillary Clinton and Rahm Emanuel, the Guardian reported. Simons is the 50th richest person in the world, according to Forbes. The mathematician has made an estimated $15.5 billion as CEO of the Renaissance Technologies hedge fund, and is individually richer than many countries. Kenneth Griffin, the other top hedge fund manager in 2015, is the founder and CEO of Citadel. He has an estimated $7.5 billion, making him the richest man in Illinois.
— source salon.com