Guy Spier is a concentrated value investor who runs the Aquamarine Fund from Zürich. See contact routes.
Guy Spier is a concentrated value investor who runs the Aquamarine Fund from Zürich, focusing on long-term capital appreciation by acquiring high-quality compounders with durable franchises, strong management, and pricing power at a reasonable price relative to intrinsic value. His portfolio is extremely concentrated, typically holding 12–14 positions dominated by financial and payment franchises such as Berkshire Hathaway, American Express, Mastercard, Bank of America, and Ferrari, alongside selective exposure to technology and natural resources. Spier’s distinctive thesis mirrors Warren Buffett’s original partnership model, emphasizing ownership of a small number of businesses with wide moats and honest management held over long time horizons rather than diversification.
Details on this investor come from filing and round data held in the StartupFundraising directory, refreshed on ingest. Founders use profiles like this one to qualify fit and to shortlist investors in Zürich.
Investors like Guy Spier · Full investor directory · Investor access · Company funding database