Peter Brown

Peter Brown is a computer scientist who joined Renaissance Technologies in 1993 after working on natural language processing and computational linguistics at IBM Research. He and Robert Mercer formed the leadership duo that took over day-to-day operations of Renaissance after Jim Simons stepped back from active management. Brown became sole CEO after Mercer's resignation. He has continued the research-driven, secretive culture that defines Renaissance Technologies. Unlike many hedge fund CEOs who cultivate public profiles, Brown maintains the extreme privacy that characterizes all Renaissance leadership. His background in language processing and machine learning reflects the firm's increasingly diverse computational approaches to market prediction. Brown's technical leadership has maintained the Medallion Fund's extraordinary performance record, a testament to the depth of Renaissance's proprietary signal discovery and portfolio construction methodology.