Billionaire Profile
Ken Griffin
Global Rank
#21

Image: Public domain | via Wikimedia Commons

Ken Griffin

CEO, Citadel LLC
US
Real-Time Net Worth
$50.4B
As of December 2025
Age
57
Source
Hedge funds
Industry
finance-investments
Citizenship
US

Biography

Ken Griffin is an American hedge fund manager, entrepreneur, and investor, renowned for founding Citadel LLC, a leading global hedge fund. Born on October 15, 1968, Griffin's career began with early investments during his time at Harvard University, where he earned a degree in economics. His wealth source primarily stems from hedge funds, and as of October 2025, his estimated net worth is $50.4 billion, ranking him among the world's wealthiest individuals. Griffin's career is marked by significant achievements in the financial sector, and he is also known for his extensive philanthropic activities, with over $2 billion donated to various causes.

Wealth Over Time

In-Depth Profile

Early Life and Education

Kenneth Cordele Griffin was born in Daytona Beach, Florida, on October 15, 1968. He spent his childhood in Boca Raton, Florida, and showed an early interest in finance. During his high school years, he ran a discount mail-order education software firm. Griffin attended Harvard University, where he studied economics and began trading from his dorm room. He graduated with a Bachelor of Arts degree in Economics in 1989.

Rise to Success

After graduating from Harvard, Griffin moved to Chicago and worked with Glenwood Capital Investments. In 1990, he founded Citadel LLC with initial assets under management of $4.6 million. Citadel quickly grew to become one of the world's most successful hedge funds. Griffin also founded Citadel Securities, a major market maker in the United States. By 2003, at the age of 34, he was the youngest person on the Forbes 400 list. Griffin's financial acumen and strategic vision were key to Citadel's sustained success, with the firm managing over $65 billion in assets by January 2025.

Key Business Strategies

Griffin's business approach emphasizes rigorous analysis, data-driven decision-making, and a focus on technology and innovation. He built Citadel on the belief that exceptional individuals, equipped with advanced quantitative analytics, could unlock opportunities in capital markets. His leadership style involves attracting and retaining top talent and fostering a high-performance culture. Citadel Securities has become a major liquidity provider, serving institutional clients worldwide and handling a significant portion of U.S. equity trades. In 2024, Citadel Securities' trading revenue reached a record $9.7 billion.

Philanthropy

Ken Griffin is known for his significant philanthropic contributions, with over $2 billion donated to various causes. His philanthropic efforts, now advanced through Griffin Catalyst, focus on education, medical research, and community development. Notable donations include $300 million to Harvard University and $400 million to the Memorial Sloan Kettering Cancer Center. He has also supported math-tutoring programs and other educational initiatives.

Career Milestones

1989

Graduated from Harvard University

Earned a degree in Economics.

1990

Founded Citadel LLC

Established Citadel with $4.6 million in capital.

2002

Founded Citadel Securities

Established market maker.

2014

Donated $150 million to Harvard University

Largest single donation to the institution at the time, for financial aid.

2023

Donated $300 million to Harvard University

Harvard's Graduate School of Arts and Sciences was renamed in his honor.

Philanthropy & Social Impact

Education

Harvard University

$450M

Donations for financial aid and to rename Harvard's Graduate School of Arts and Sciences.

Health

Memorial Sloan Kettering Cancer Center

$400M

Donation, in combination with the David Geffen Foundation, for a new cancer pavilion.

Education

Miami Dade College

$20M

Gifts for scholarships.

Civic

National Constitution Center

$15M

Donation to the National Constitution Center

Business Philosophy & Leadership

Notable Quotes

"“Business is business. I don't manufacture cars, but we do manufacture money.”"

"“It's very hard to know you're in a bubble until it's gone.”"

"“You can't succeed in the markets today unless you are part of a great team. The team is the essence of how you win.”"

Leadership Principles

Focus on Talent

Attracting and retaining top minds in finance, technology, and related fields.

Data-Driven Decisions

Making decisions based on rigorous analysis and quantitative models.

High-Performance Culture

Fostering a fast-paced, competitive environment that values ingenuity and achievement.

Controversies & Challenges

2020

Political Donations

Contributed millions to conservative candidates and causes, raising concerns about influence on the democratic process.

2021

GameStop Trading Frenzy

Citadel's role as a market maker during the GameStop short squeeze led to public scrutiny.

2021

Robinhood Controversy

Citadel's relationship with Robinhood and the halting of GameStop trading sparked controversy and criticism.

2024

Pausing Donations to Harvard

Pausing donations to Harvard due to concerns about the handling of antisemitism on campus.