Simons Foundation Co-Founder, Mathematician and Investor Jim Simons Dies at 86

It is with great sadness that the Simons Foundation announces the death of its co-founder and chair emeritus, James Harris Simons, on May 10, 2024, at the age of 86, in New York City.

A note from SIDB:

Friends and colleagues at the Simons Initiative for the Developing Brain (SIDB) and the University of Edinburgh would like to pass on our heartfelt condolences to Marilyn Simons and her family on the death of James (“Jim”) Simons. Jim began his career as a mathematician whose profound mathematical discoveries have been applied in almost all areas of physics, from string theory, to condensed matter, to quantum computing and gravity.

His intellectual accomplishments were matched by his generosity. Jim and Marilyn established the Simons Foundation in 1994, with a mission to advance the frontiers of research in mathematics and the basic sciences. The foundation’s ethos that scientific progress depends on the cross- pollination of ideas and disciplines remains a driving force in its grantmaking. Our research into the mechanism of brain development and neurodevelopmental disorders at the University of Edinburgh has been transformed by Jim and Marilyn’s vision. We will be forever grateful for their foresight and his generosity.

Jim’s vision and support of scientists has dramatically changed scientific exploration and reinforced the need for basic science. A statement from the Simons Foundation can be found at: