Published on 12/1/08
Published on 12/1/08
Video
James Simons, 67
Net worth: $5.5 billion
No. 57 on Forbes' 400 richest Americans
Simons is one of the kingpins of the newly ascendant hedge-fund industry. His private Renaissance Technologies Corporation holds upwards of $20 billion in public assets. But since all work and no play would make James a dull boy, Simons dabbles in theoretical physics, including string theory.
NEXT »