Steve Mandell: Biography, Career, and Business Insights

Steve Mandell’s Profile Summary

Company	Lone Pine Capital
Position	Founder, Managing Member, and a Member of the Management Committee at Lone Pine Capital. He established the firm in 1997
Source of wealth	Management and performance fees from Lone Pine Capital’s investment strategies, investments in public equities, and prior roles at Tiger Management
Also known as	Philanthropist, former Chairman of Dartmouth's Board of Trustees.
Age	69
Education	Dartmouth College – Bachelor’s in Government, Harvard Business School – MBA
Citizenship	United States
Residence	Greenwich, Connecticut, USA
Family	Steve Mandel is married to Susan Joy Zadek, and they have three children
Website, Social Media	https://www.lonepinecapital.com/

Steve Mandell’s biography

Stephen Frank Mandel Jr., born in 1956, is a prominent American hedge fund manager, investor, and philanthropist. After earning his Bachelor’s degree in Government from Dartmouth College in 1978 and an MBA from Harvard Business School in 1982, Mandel began his career as a consultant at Mars & Co. He then moved on to Goldman Sachs, where he worked as a consumer retail analyst. In the 1990s, he joined Tiger Management under Julian Robertson, eventually becoming a senior managing director and consumer analyst. In 1997, Mandel founded Lone Pine Capital, named after a symbolic tree at Dartmouth College. Lone Pine quickly gained recognition for its fundamental analysis and bottom-up stock-picking approach. Under his leadership, the firm has grown into one of the most successful long/short equity hedge funds. Though Mandel stepped back from active investment management in 2019, he remains a managing director. Beyond finance, Mandel is known for his philanthropy, particularly through his Zoom Foundation and Lone Pine Foundation, supporting education initiatives like Teach for America. He also served as the chairman of Dartmouth’s Board of Trustees

How did Steve Mandell make money?

Steve Mandell makes money in the following areas:

Management and performance fees from Lone Pine Capital’s investment strategies, investments in public equities, and prior roles at Tiger Management
What is Steve Mandell net worth?

As of 2025, Steve Mandell’s net worth is estimated to be $2,5B.

What is Steve Mandell also known as?

Steve Mandel is recognized for his extensive philanthropic work. He founded the Zoom Foundation, which supports a wide range of charitable causes, focusing particularly on education. He is also a co-founder of the Lone Pine Foundation, a charitable organization that has contributed millions to education initiatives. Mandel served as the chairman of Dartmouth College's Board of Trustees, demonstrating his commitment to education and institutional leadership. Furthermore, he has been actively involved with Teach for America, sitting on its national board of directors. Through these roles, Mandel has used his influence and wealth to make significant contributions to education and public service

Prominent achievements of Steve Mandell

Steve Mandel founded Lone Pine Capital in 1997, one of the top-performing long/short equity hedge funds. He has been ranked among the highest-earning hedge fund managers multiple times, including being in the top 15 in 2018. Mandel served as chairman of Dartmouth College's Board of Trustees, co-founded the Lone Pine Foundation and Zoom Foundation, and made substantial donations to educational causes, including Teach for America

What are Steve Mandell’s key insights?

Steve Mandel's investment philosophy is centered around deep fundamental analysis and a bottom-up approach to stock picking. He emphasizes long-term value, seeking companies with sustainable competitive advantages and strong management. His approach involves a mix of value and growth investing, and he is known for being one of the successful "Tiger Cubs," a group of fund managers mentored by Julian Robertson. Mandel also focuses on businesses undergoing significant changes or transformations, which he believes present compelling investment opportunities

Steve Mandell’s personal life

Steve Mandel has been married to Susan Joy Zadek since 1982, whom he met during his time at Harvard. They have three children together. His wife, Susan, is actively involved in philanthropy as a trustee of the Environmental Defense Fund and Vassar College

Useful insights

Decision-making and success

Making the right decisions at the right time is often what sets successful people apart. Drawing on the experience of Ray Dalio, founder of Bridgewater Associates, here are some key lessons for improving your decision-making and achieving long-term success.

Create a decision-making framework

Ray Dalio advocates for a clear, principles-based approach to decision-making. Establish a set of guiding principles that you consistently apply when faced with choices. This will help you stay focused and avoid emotional or impulsive decisions.
Embrace transparency and open feedback

Dalio’s philosophy of radical transparency is about creating an environment where honest feedback is encouraged. Whether in your career or personal life, being open to criticism and maintaining transparency will help you grow and make better decisions.
Prepare for risks and manager them wisely

Success isn’t just about making the right moves—it's also about managing risks effectively. Always consider worst-case scenarios and have a plan in place to navigate them. Risk management is a crucial part of any decision-making process.