Guy Spier (born February 4, 1966) is a Zurich-based investor. He is the author of The Education of a Value Investor.[2] Spier is the manager of the Aquamarine Fund with $350 million in assets.[3] He is well known for bidding US$650,100 with Mohnish Pabrai for a charity lunch with Warren Buffett in 2008.[4] In 2009, he was featured in The Checklist Manifesto, by Atul Gawande regarding his use of checklists as part of his investment process.[5] He is the brother of Tanya de Jager and the grandson of Selmar Spier, the German-Israeli jurist, historian, foreign correspondent and farmer.
