Short answer: No IQ score for Jim Simons (1938–2024) was ever published, and no researcher has estimated one. His record is the evidence: an MIT degree in three years, a Berkeley PhD at 23, codebreaking for the National Security Agency, the 1976 Veblen Prize in geometry, the Chern–Simons forms and a Medallion Fund that averaged 66 percent a year before fees from 1988 to 2018.
At a glance
| Estimated IQ | No scholarly estimate |
|---|---|
| Basis of estimate | None published; no disclosed test score |
| Measured score | None on record |
| Born – died | April 25, 1938, Cambridge, Massachusetts – May 10, 2024, New York City |
| Field | Differential geometry; quantitative finance |
| Signature achievement | Chern–Simons forms (1974); Renaissance Technologies' Medallion Fund (from 1988) |
| Major honor | Oswald Veblen Prize in Geometry, American Mathematical Society (1976) |
| Comparable minds | John Nash, John von Neumann, Alan Turing |
No number on record
There is no public IQ score for James Harris Simons. He never disclosed one, and none appears in the published record of his life. His 1938 birth also puts him far outside Catharine Cox's 1926 study of historical geniuses, which covered people born between 1450 and 1850; historical IQ estimates explained describes how that study worked.
Simons often said his professional life had three phases: mathematician, investor and philanthropist. Each phase left hard evidence of how his mind worked. Together they say more than a test result could.
The mathematician
Simons was born on April 25, 1938, in Cambridge, Massachusetts, and raised in Brookline. He completed his mathematics degree at MIT in three years, graduating in 1958, and earned his PhD at the University of California, Berkeley, in 1961, at 23. His dissertation, supervised by Bertram Kostant, was titled "On the transitivity of holonomy systems."
The early papers were already serious. His 1968 paper on minimal varieties in Riemannian manifolds, published in the Annals of Mathematics, and related work on minimal cones bore directly on the Bernstein conjecture, a long-standing problem about minimal surfaces.
His best-known contribution came in 1974. With Shiing-Shen Chern he published "Characteristic Forms and Geometric Invariants," the paper that introduced what are now called Chern–Simons forms. Physicists later built Chern–Simons theory on them, and the Simons Foundation notes that the work became instrumental to string theory, topology and condensed matter physics.
In 1976 the American Mathematical Society gave him the Oswald Veblen Prize in Geometry for his contributions to geometry and topology. From 1968 to 1978 he chaired the mathematics department at Stony Brook University.
The codebreaker
Between 1964 and 1968 Simons worked at the Institute for Defense Analyses on codebreaking for the National Security Agency, while also teaching at MIT and Harvard. He was forced to leave after publicly opposing the Vietnam War. The cryptographic reputation outlasted the job: in 1973, IBM asked him to attack its Lucifer cipher.
The work rewarded a habit that would define his second career: finding faint, repeatable patterns in noisy data and trusting the statistics over the story.
The market as a math problem
In 1978 Simons left academia and founded the firm that became Renaissance Technologies, which pioneered quantitative trading. Its flagship Medallion Fund, launched in 1988, produced an average gross annual return of 66.1 percent from 1988 to 2018, or 39.1 percent after fees. The fund has earned more than $100 billion in trading profits since inception.
Gregory Zuckerman's 2019 book The Man Who Solved the Market told the story for a general audience. When Simons died in New York on May 10, 2024, at 86, his fortune was estimated at $31.4 billion.
What a score would miss
Consider what a very high IQ actually picks out. A score of 150 lies about 3.3 standard deviations above the mean, roughly 1 person in 2,300. In the United States alone that is well over 100,000 people. Only one of them built Medallion.
The gap is the lesson. Simons' record rests on traits no test scores: taste in problems, the judgment to assemble and keep a research team, patience with noisy data and the stamina to run one method for decades. For what IQ does and does not predict, see what counts as a high IQ.
Then came the third career. With his wife, Marilyn, he founded the Simons Foundation in 1994, and in 2004 he founded Math for America. The couple gave more than $4 billion to philanthropic causes, much of it to mathematics and basic science.
Simons among the mathematicians
Simons belongs to a small group whose mathematics mattered far outside mathematics. John Nash gave economists the equilibrium concept. John von Neumann gave them game theory and gave engineers the stored-program computer. Alan Turing, like Simons, turned mathematics against codes. None of the four has a verified IQ score, so any ranking among them rests on work.
For the field as a whole, see mathematicians' IQs ranked. His full life story is in our Jim Simons biography.
How we assessed this
We checked the published biographical record and the Simons Foundation's obituary for any disclosed score and found none. Dates, prizes and fund figures above come from those sources and from the mathematical literature. We publish no estimate because no credible one exists.
Frequently asked questions
What was Jim Simons' IQ?
Jim Simons never disclosed an IQ score, and none has been published or credibly estimated. Figures posted online have no documented source. His measurable record is the better guide: a Berkeley PhD at 23, the 1976 Oswald Veblen Prize in Geometry, the Chern–Simons forms and the Medallion Fund's 66 percent average annual gross return from 1988 to 2018.
Was Jim Simons a genius?
In mathematics, his peers gave him the Veblen Prize in 1976, and physicists still use the Chern–Simons forms he developed with Shiing-Shen Chern. In finance he built Renaissance Technologies, which the Simons Foundation describes as one of the most profitable investment firms in history. Very few people have reached the top of two such different fields.
Who had a higher IQ, Jim Simons or John Nash?
Neither has a verified score, so no one can say. Both were geometers first: Nash proved embedding theorems for Riemannian manifolds, and Simons worked on minimal varieties and characteristic forms. Nash's ideas transformed economic theory; Simons applied mathematics to markets directly and made a fortune doing it. See John Nash's IQ.
How did Jim Simons make his money?
He founded the firm that became Renaissance Technologies in 1978 and used mathematical and statistical models, rather than human judgment, to trade. Its Medallion Fund, launched in 1988, averaged 66.1 percent a year before fees and 39.1 percent after fees through 2018. His fortune was estimated at $31.4 billion when he died in 2024.
Did Jim Simons work for the NSA?
Yes, by way of a defense research institute. From 1964 to 1968 he worked at the Institute for Defense Analyses on codebreaking for the National Security Agency, while also teaching at MIT and Harvard. He was forced to leave after publicly opposing the Vietnam War, and he then became chairman of the mathematics department at Stony Brook University.
Sources
- Jim Simons – Wikipedia — Birth, education, IDA years, Stony Brook, Veblen Prize, Medallion returns, net worth, philanthropy
- Simons Foundation Co-Founder, Mathematician and Investor Jim Simons Dies at 86 — Death, three phases of his career, Renaissance founding, impact of his mathematics
- Chern–Simons form – Wikipedia — 1974 paper with Chern and later use in physics
- Cox, The Early Mental Traits of Three Hundred Geniuses (1926) – Internet Archive — Historical study limited to people born 1450–1850
Editorial standard: IQ figures for historical figures are retrospective estimates and are labeled as such; scores for living people appear only when the person disclosed them or a reputable outlet reported them. Corrections: contact the editors.