Billionaire Profile
Stephen Mandel Jr
Global Rank
#1610

Image: Public domain | via Wikimedia Commons

Stephen Mandel Jr

CEO, Lone Pine Capital
US
Real-Time Net Worth
$2.5B
As of December 2025
Age
69
Source
Hedge funds
Industry
finance-investments
Citizenship
US

Biography

Stephen Frank Mandel Jr. (born March 12, 1956) is a prominent American hedge fund manager, investor, and philanthropist. His career began after graduating from Dartmouth College and Harvard Business School. He served as a consultant at Mars & Co, and an analyst at Goldman Sachs, before joining Tiger Management. In 1997, he founded Lone Pine Capital, a successful hedge fund firm. Mandel's wealth source primarily comes from his hedge fund activities. His estimated net worth as of December 5, 2025, is $2.5 Billion. He is known for his philanthropic work, supporting educational initiatives and environmental causes.

Wealth Over Time

In-Depth Profile

Early Life and Education

Stephen Frank Mandel Jr. was born on March 12, 1956, in Darien, Connecticut. He graduated from Phillips Exeter Academy in 1974 and then attended Dartmouth College, where he earned a Bachelor of Arts in government in 1978. He furthered his education at Harvard Business School, receiving an MBA in 1982.

Rise to Success

Mandel began his career as a senior consultant at Mars & Co from 1982 to 1984. He then worked as a consumer-retail analyst at Goldman Sachs from 1984 to 1990. Subsequently, he became a consumer analyst and managing director at Tiger Management under Julian Robertson. In 1997, Mandel founded Lone Pine Capital, a hedge fund management company based in Greenwich, Connecticut.

Key Business Strategies

Lone Pine Capital focuses on high-conviction equity investment opportunities with a rigorous bottom-up research and analysis approach to uncover unique insights. Stephen Mandel is known for his fundamental analysis and bottom-up stock picking.

Philanthropy

Mandel has been involved in various philanthropic endeavors. He founded the Zoom Foundation, which supports education and environmental causes. He also serves on the national board of directors for Teach for America and has served as chairman of Dartmouth's board of trustees.

Career Milestones

1982

Senior Consultant

Began career at Mars & Co.

1984

Consumer-Retail Analyst

Joined Goldman Sachs as an analyst.

1990

Managing Director

Became Managing Director at Tiger Management.

1997

Founder

Founded Lone Pine Capital.

2019

Managing Director

Transitioned away from managing investments for Lone Pine Capital.

Philanthropy & Social Impact

Education and Environment

Zoom Foundation

$1.2B (assets)

Supports education and environmental causes.

Community Development

Lone Pine Foundation

Unknown

Supports children and families in communities where Lone Pine has offices.

Education

Teach for America

Unknown

Serves on the National Board of Directors.

Business Philosophy & Leadership

Notable Quotes

"If you can manage a classroom and inspire kids, it's going to be a hard thing for you to do, but it's just unbelievable preparation for anything you're going to do in life."

Leadership Principles

Efficiency

Strives to run things efficiently and make meetings as productive as possible.

Emphasis on Education

Believes that education is the basis for everything.