Warren Edward Buffett (/ˈbʌfɪt/; born August 30, 1930) 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.