LeaderPortfolio
Greenberg
Joel Greenberg
Rank #1394
UNITED STATESFinance & InvestmentsTrading, investments

Joel Greenberg

Net Worth
$3.003B
0% (24h)
Joel Greenberg is an American billionaire businessman and co-founder of Susquehanna International Group (SIG), one of the world's largest and most successful trading firms. His source of wealth comes from trading and investments. Greenberg, who met his billionaire co-founder Jeff Yass at SUNY Binghamton, served as SIG's chief operating officer after co-founding the firm in 1987. As of January 2025, his net worth was estimated at $2.3 billion. Greenberg is known for his analytical rigor, and his career has seen him become an executive producer and involved in philanthropy.

How to read Joel Greenberg's profile

Public net-worth figures are estimates. They combine observable inputs—typically listed equity, disclosed transactions, and market prices—with editorial judgment where filings are incomplete (for example, private holdings, debt, or cross-holdings). For Joel Greenberg, we anchor the narrative to Trading and Trading, investments, then update the headline number as markets move. The chart on this page is meant to show trajectory, not a certified balance sheet.

When you see $3.003B alongside global rank #1394, interpret it as our best synthesis of widely cited ownership and price signals—not a claim about cash on hand. Estimates can diverge from other publishers because of different treatment of options, trusts, charitable vehicles, or illiquid assets. We document the general approach in methodology and welcome corrections via corrections.

Country (UNITED STATES) and career milestones on this page are curated for reader context; they should be verified against primary sources when used for research. Editorial metadata for this profile is refreshed on a rolling basis, with deeper audits at least annually (last noted cycle: 2026).

Looking for depth? When available, the dossier and timeline sections below add long-form context beyond the headline number—prioritize those modules when evaluating claims about strategy, controversies, or philanthropic commitments.

The Full Dossier

Early Life and Education

Joel Kenneth Greenberg was born in either 1957 or 1958. He earned a Bachelor's degree from Binghamton University where he met his future co-founder Jeff Yass. He then earned a Juris Doctor degree from Columbia Law School.

Rise to Success

In 1987, Greenberg co-founded Susquehanna International Group (SIG) and served as its chief operating officer. SIG is a major player in quantitative trading.

Key Business Strategies

SIG's success is attributed to its probabilistic, game-theory-driven approach to trading. The company has made significant investments in private companies, including a major stake in ByteDance, the parent company of TikTok. Greenberg retired from his role at SIG in 2016.

Philanthropy

Greenberg, with his wife Marcy Gringlas, is involved in philanthropy through their Seed the Dream Foundation, donating over $2 million to the USC Shoah Foundation.

Career Timeline

2021

Executive Producer

Served as an executive producer for the film "The Survivor"

2016

Retired from Susquehanna International Group

Retired from his role at SIG.

1987

Cofounded Susquehanna International Group

Co-founded Susquehanna International Group (SIG) and became Chief Operating Officer. SIG is one of Wall Street's largest and most successful trading firms.

Philanthropic Impact

Education$2M+

USC Shoah Foundation

Through their Seed the Dream Foundation, Joel and Marcy have donated over $2 million to the USC Shoah Foundation.

Key Business Ventures & Holdings

CompanyStakeValue
Susquehanna International Group (SIG)3.00%

Net Worth History

In-Depth Analysis

Early Life and Education

Joel Kenneth Greenberg was born in either 1957 or 1958. He earned a Bachelor's degree from Binghamton University where he met his future co-founder Jeff Yass. He then earned a Juris Doctor degree from Columbia Law School.

Rise to Success

In 1987, Greenberg co-founded Susquehanna International Group (SIG) and served as its chief operating officer. SIG is a major player in quantitative trading.

Key Business Strategies

SIG's success is attributed to its probabilistic, game-theory-driven approach to trading. The company has made significant investments in private companies, including a major stake in ByteDance, the parent company of TikTok. Greenberg retired from his role at SIG in 2016.

Philanthropy

Greenberg, with his wife Marcy Gringlas, is involved in philanthropy through their Seed the Dream Foundation, donating over $2 million to the USC Shoah Foundation.

Data Sources & Methodology

Figures for Joel Greenberg are synthesized from the sources below and cross-checked against our net worth methodology. Estimates may lag market moves; see corrections to report discrepancies.