Billionaire Profile
Stephen Mandel Jr
Global Rank
#869

Image: Hedge Funds | CC BY 3.0 | via Wikimedia Commons

Stephen Mandel Jr

CEO, Hedge funds
UNITED STATES
Real-Time Net Worth
$4.963B
Estimated based on Hedge funds stock value as of April 21, 2026
0% (24h)
Age
70
Source
Hedge funds
Industry
Finance & Investments
Citizenship
UNITED STATES

Biography

Stephen Mandel Jr. is a prominent figure in the hedge fund industry, recognized for founding Lone Pine Capital in 1997. His source of wealth stems from his successful hedge fund operations, focusing on long/short equity strategies. With a career spanning from Goldman Sachs to Tiger Management, Mandel built a reputation for insightful stock picking. As of 2024, his estimated net worth is $2.5 billion. Beyond finance, he is also known for his philanthropic contributions through the Zoom Foundation, focusing on supporting educational initiatives. He is also a big donor to charter schools and sits on the national board of directors of Teach for America.

Fact Checked
Verified by Editorial Team
Live Data
Updated 4/21/2026

Wealth Over Time

In-Depth Profile

Early Life

Stephen Frank Mandel Jr. was born on March 12, 1956, in Darien, Connecticut. He graduated from Phillips Exeter Academy in 1974. He then attended Dartmouth College, where he earned a Bachelor of Arts degree in government in 1978. Mandel also holds an MBA from Harvard University, which he completed in 1982.

Rise to Success

Mandel's career began at Mars & Co as a senior consultant from 1982 to 1984. He then worked at Goldman Sachs as a consumer-retail analyst from 1984 to 1990. From 1990 to 1997, he served as a consumer analyst and eventually managing director at Tiger Management, where he was known as one of the elite "Tiger Cubs". In 1997, with backing from Julian Robertson, Mandel founded Lone Pine Capital, named after a Dartmouth College pine tree. Forbes recognized him as one of the highest-earning hedge fund managers in 2012, 2013, and 2018. Mandel transitioned away from managing investments at Lone Pine Capital in January 2019, but remains a managing director.

Key Business Strategies

Lone Pine Capital focuses on long/short equity strategies, investing in public companies globally. The firm employs a bottom-up, fundamental analysis approach to identify high-quality businesses with strong growth potential and sustainable competitive advantages. Mandel's strategy has involved favoring stocks that compound value through organic earnings growth.

Philanthropy

Mandel and his wife, Susan, founded the Zoom Foundation in 2001. He is also the chair of the national board of directors at Teach for America.

Career Milestones

1982

Senior Consultant

Began career at Mars & Co.

1984

Consumer-Retail Analyst

Joined Goldman Sachs.

1990

Managing Director

Worked at Tiger Management.

1997

Founder

Founded Lone Pine Capital.

2019

Transitioned from Managing Investments

Stepped back from day-to-day investment management at Lone Pine Capital, remaining a managing director.

Philanthropy & Social Impact

Education and Charitable Giving

Zoom Foundation

$1.2B (Assets)

Founded with his wife, Susan Mandel, and directs funds to donor-advised funds.

Education

Teach for America

Undisclosed

Serves as chair of the national board of directors.

Business Philosophy & Leadership

Notable Quotes

"Mandel has built up a reputation as one of the hedge fund industry's best when it comes to fundamental analysis and bottom-up stock picking."

Leadership Principles

Focus on Fundamental Analysis

Emphasis on in-depth research to identify investment opportunities in companies with strong fundamentals.

Long-Term Perspective

Prioritizing long-term investments rather than short-term trading strategies.

Adaptability

Adaptability over short-term trading, fostering a culture of debate and expertise.