American businessman, investor, and philanthropist. Vice chairman of Berkshire Hathaway and chairman of the Daily Journal Corporation.

Dutch dad. @Shell since 1997. Ex-expat. Strategy, NBD, M&A. Waterpolo. Board member http://zvl1886.nl. ∞/21m +⚡️= 🚀. Tweets represent my own personal views.

Former hedge fund investor turned entrepreneur. CEO @thetikr. Tweet about hedge funds, stocks, building businesses, and life's journey.