AUM

~$21 billion (estimated); $306M in public 13F securities (Q2 2025)

Principals

Principal Net Worth

$31.4B

Founded

2009

Data Flags

Jim Simons deceased May 2024 - net worth at death $31.4B confirmed; 13F filings provide current holdings data; team verified via LinkedIn and Simons Foundation website

Euclidean Capital Research

SFOHigh Confidence

160 Fifth Avenue, 9th Floor, New York, NY 10010

Last verified: Jan 17, 2026

Details

Website: euclidean.com
Phone: (212) 537-0310
Source of Wealth: Finance (Renaissance Technologies hedge fund)
Assets Under Management: ~$21 billion (estimated); $306M in public 13F securities (Q2 2025)
Source File: research/organizations/euclidean-capital.md
UID: fo-euclidean-capital

Also Known As

Euclidean CapitalEuclidean Capital LLCSimons Family OfficeJim Simons Family OfficeJames Simons Family Office

Principals (7)

James Simons (Deceased)Founder (Founded 1982)OWNS

$31.4B

James SimonsRenaissance Technologies founderOWNS

Marilyn SimonsPhilanthropistOWNS

Nathaniel SimonsPrelude VenturesOWNS

Liz SimonsPresidentOWNS

Paul Simons-OWNS

Nicholas Simons-OWNS

Team Members (1)

James SimonsFounder & Chairman (deceased)

WORKS_AT

Related Entities (2)

Euclidean Capital LLCInvestment Vehicle

Single-family office (founded 2009)

Simons FoundationFoundation

Private foundation for math and science research

Known Associates (2)

Renaissance Technologies

Jim remained involved until death

Simons Foundation

$6B+ in grants to date

Relationship Strength

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Sources (7)

Changelog

2026-01-17Added Verification Status section (High confidence - Jim Simons net worth $31.4B at death confirmed; 13F filings provide holdings data)
2025-12-10Initial research file created
2025-12-26Added comprehensive team data post Jim Simons death (May 2024): Euclidean Capital (Ashvin Chhabra President/CIO, Monique Miller), Simons Foundation (David Spergel President, EVPs), Flatiron Institute directors, Math for America (Maria Klawe President 2023), Prelude Ventures (Nathaniel Simons Chairman, Managing Directors)