Quant Trader Jim Simons Dies at 86

Jim Simons, a mathematician who became a billionaire investor and philanthropist, passed away on Friday at the age of 86. His death was announced by the Simons Foundation, the scientific research organization he established, which did not disclose the cause of death. Simons is survived by his wife and three children.

Simons, once the chair of the mathematics department at Stony Brook University, founded Renaissance Technologies in 1982. The hedge fund, specializing in quantitative trading, became one of the most successful investment firms ever under his leadership before his retirement in 2010. Renaissance now manages $106 billion in assets and is best known for its Medallion Fund, a $10 billion fund known for its consistent gains, accessible only to Renaissance’s owners and employees.

Alongside his wife, Marilyn Simons, he co-founded the Simons Foundation in 1994, dedicated to supporting education, mathematics, and basic science. Their philanthropy extended to supporting autism research and Math For America, an organization assisting STEM teachers that Simons also co-founded.

Surprisingly, Simons served as a codebreaker for the U.S. during the Vietnam War. Born in 1938 in Brookline, Massachusetts, Simons earned a bachelor’s degree in mathematics from MIT in 1958, after just three years of study. His mathematical achievements significantly contributed to fields such as string theory, topology, and condensed matter physics, according to the foundation.

Although Simons retired from Renaissance in 2010, advocating for a quantitative approach to trading, he remained active in his role as co-founder of the Simons Foundation until his passing.