Jim Simons, Math Genius Who Conquered Wall Street, Dies at 86 The New York TimesJim Simons, billionaire hedge fund founder, dies at 86 CNNUPDATE 3-Billionaire quant investing pioneer and philanthropist James Simons dies at 86 Yahoo FinanceJim Simons, billionaire quantitative investing pioneer who generated eye-popping returns, dies at 86 CNBC