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Guy Spier is a Zurich-based investor, and commentator. In June 2007 he made headlines by bidding US$650,100 with Mohnish Pabrai for a charity lunch with Warren Buffett. In 2009 he was featured in The Checklist Manifesto by Atul Gawande, regarding his use of checklists as part of his investment process. Guy manages the Aquamarine Fund, an investment partnership inspired by, and styled after, the original 1950's Buffett partnerships. He is a regular media commentator on economic and political affairs, and serves on the advisory board of Horasis, a Swiss-based think tank founded by Frank-Jürgen Richter, and on the Harvard Business School Alumni Board. From 2001 to 2007, Spier was the President of the Oxford Alumni Association of New York.  

In 2014 he published his first book, ''The Education of a Value Investor'' which is now also published in German and Hebrew. Other languages including Korean are in the pipeline. 

Since 1997, Guy Spier has been the manager of Aquamarine Fund, an investment partnership inspired by the original 1950's Buffett partnerships. In 2009, Spier and his family (wife Lory and his three children - Eva, Isaac and Sarah) moved from New York to Zurich, Switzerland. His offices are based in New York, London and headquarters are in Zurich.

He attained his MBA from Harvard Business School (class of 1993) and has a First Class degree in PPE (Politics, Philosophy and Economics) from Oxford University, where he was a contemporary of David Cameron at Brasenose attending economics tutorials together.  Upon graduating, he was co-awarded the George Webb Medley prize for the best performance in Economics. He then went on to work with at Braxton Associates, now part of Deloitte Consulting, and joined the Forward Studies Unit of the European Commission in Brussels as an intern.

He has appeared in various media including The Times, Bloomberg, CNBC, WSJ and the BBC - with commentary on various financial issues. He is also a noted speaker on investment management and spoke at TED India and co-hosted TEDx Zurich. In New York, Guy served for 4 years as the President of the Oxford Alumni Association of New York, and is on the advisory board of the Dakshana Foundation and was a speaker at Ted University which preceded TED India.

Mr. Spier’s present and past outside commitments include: Harvard Business School Alumni Board (2012- 2015), The Oxford Alumni Association New York, President (2001 – 2007); The Dakshana Foundation Board (2007 – 2008); Horasis, Advisory Board Member (2010); TEDxZurich, Founder and Co-Host (2010, 2011); TEDxTelAvivSalon, Co-Host (2012)  Weizmann Science and Business Club as Chairman (2012 -2015), YPO Greater MENA, Chairman (2012-2013), Entrepreneurs Organization (EO Israel), Young Presidents Organization (YPO Greater Europe and YPO Manhattan). 

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