Warren Buffett is an American businessman, investor and philanthropist. He is currently the third wealthiest person in the world with a net worth of $84 billion as of 2018. Buffett received a master's degree in economics from the University of Nebraska-Lincoln and Columbia Business School. He is the chairman and CEO of Berkshire Hathaway, a multinational conglomerate holding company he has led since 1965. Berkshire Hathaway owns companies across various industries including insurance, utilities, manufacturing and retail. Buffett is considered one of the most successful investors in the world and is known for his value investing strategies and long-term holdings.