Guy Spier: Biography, Career, and Business Insights

Guy Spier’s Profile Summary

Company	Aquamarine Capital
Position	Founder and Managing Partner
Source of wealth	Hedge fund management via Aquamarine Capital Investment consulting and value investing strategies
Also known as	Author, Philanthropist, Value Investor
Age	59
Education	Oxford University – First Class Honors in Politics, Philosophy, and Economics Harvard Business School – MBA, Class of 1993
Citizenship	Swiss
Residence	Zurich, Switzerland
Family	Spouse: Lory Spier Children: Eva, Isaac, and Sarah
Website, Social Media	https://www.aquamarinefund.com/https://www.linkedin.com/in/gspier/?locale=de_DE https://www.guyspier.com/

Guy Spier’s biography

Guy Spier, born on February 4, 1966, is a Zurich-based investor best known for his work at Aquamarine Capital, an investment fund modeled after Warren Buffett’s early partnerships. Spier's career began in investment banking in New York and consulting in London and Paris, but he eventually shifted to focus on value investing, inspired by Buffett. He earned his MBA from Harvard Business School in 1993 and holds a First Class degree in Politics, Philosophy, and Economics from Oxford University.

In 1997, Spier launched Aquamarine Fund, which has since grown to manage over $350 million in assets. Spier gained additional recognition for bidding $650,100 in 2008, alongside fellow investor Mohnish Pabrai, for a charity lunch with Warren Buffett—a transformative event in his investing career. He authored "The Education of a Value Investor" in 2014, detailing his journey and investment philosophy

How did Guy Spier make money?

Guy Spier makes money in the following areas:

Hedge fund management via Aquamarine Capital Investment consulting and value investing strategies
What is Guy Spier net worth?

As of 2025, Guy Spier’s net worth is estimated to be $370M.

What is Guy Spier also known as?

Guy Spier is not only an accomplished investor but also a successful author. His book, "The Education of a Value Investor," shares his transformation into a disciplined value investor and has been translated into multiple languages. He is a frequent speaker at investment conferences and regularly shares insights on intelligent investing and value strategies

Prominent achievements of Guy Spier

Authored "The Education of a Value Investor", a critically acclaimed book on value investing
Successfully managed Aquamarine Capital, growing its assets to over $350 million
Winner of a charity lunch with Warren Buffett in 2008, a pivotal experience in his investment career

What are Guy Spier’s key insights?

Guy Spier’s investment philosophy is grounded in value investing inspired by Warren Buffett. He emphasizes the importance of long-term thinking, ethical decision-making, and aligning personal values with investment choices. His focus is on intelligent investing where the goal is to find value in quality companies rather than chasing speculative trends

Guy Spier’s personal life

Spier lives in Zurich with his wife Lory and three children – Eva, Isaac and Sarah

Useful insights

Understanding market forces

In my experience, to truly succeed as an investor, it’s essential to understand the driving forces behind market behavior. Market movements aren’t random—they’re influenced by a range of economic theories and dynamics. The following books provide valuable insights into these forces, offering a deeper understanding of how global financial markets operate and what shapes their trends.

Nassim Nicholas Taleb – "The Black Swan"
- Summary:
  
  Taleb explores the concept of rare, unpredictable events—so-called "Black Swans"—that can have massive impacts on markets and society. These events are often overlooked by traditional risk management models, leading to devastating consequences when they occur. Taleb illustrates how these unpredictable shocks shape our world, often more than gradual, expected changes.
- Why read it:
  
  This book challenges conventional thinking about risk and uncertainty, showing that many major historical and financial events were "Black Swans." It's a vital read for investors who want to build resilience in the face of market volatility.
John Maynard Keynes – "The General Theory of Employment, Interest, and Money"
- Summary:
  
  Keynes revolutionized economics by focusing on total demand within an economy and its effect on output and inflation. His theory suggested that government intervention could stabilize economic cycles through fiscal and monetary policy. The book also explains the consequences of under-consumption and the role of interest rates in managing economic stability.
- Why read it:
  
  For investors interested in macroeconomic trends and policy impacts, Keynes’ work is essential. Understanding the Keynesian framework can help investors predict how government actions might influence market performance.