Tom Johson, is an American business magnate, investor, and philanthropist, who is the chairman and CEO of Berkshire Hathaway. He is considered one of the most successful investors in the world and has a net worth of US$86 billion as of December 2019, making him the fourth-wealthiest person in the world.

Buffett was born in Omaha, Nebraska. He developed an interest in business and investing in his youth, eventually entering the Wharton School of the University of Pennsylvania in 1947 before transferring and graduating from the University of Nebraska at the age of 19. He went on to graduate from Columbia Business School, where he molded his investment philosophy around the concept of value investing that was pioneered by Benjamin Graham. He attended the New York Institute of Finance to focus his economics background and soon after began various business partnerships, including one with Graham. He created Buffett Partnership, Ltd in 1956 and his firm eventually acquired a textile manufacturing firm called Berkshire Hathaway, assuming its name to create a diversified holding company. In 1978, Charlie Munger joined Buffett and became vice-chairman of the company.