Recently, we did a post about George Soros, one of the most successful hedge fund managers in the world. Well, Mr Soros is not the wealthiest hedge fund manager, despite his success in the career path. That title goes to Jim Simons and we are going to take a brief look at who he is, in this article. Meet Jim Simons Jim Simons is the founder of Renaissance Technologies, an esteemed quantitative trading hedge fund firm that sits on top of a massive $55 billion fortune. Jim founded his hedge fund, Renaissance Technologies, in 1982. Although he retired in 2010, he still plays a role at Renaissance and benefits from its funds.