CO-FOUNDER, PARTNER, TGS MANAGEMENT LLC
WHY: Founded under-the-radar quant hedge fund with partners David Gelbaum and Andrew Shechtel in 1989. Company develops quantitative trading systems software and technology solutions. Has been on Business Journal OC’s Wealthiest, estimate of $1B fortune could be on low side, reports suggest. Offices in Irvine and Princeton, N.J.
NOTABLE: Company has reportedly funneled $13B to charity, and personally gives to human rights and education.