Carlos Slim Helú (Spanish pronunciation: [ˈkaɾlos esˈlim eˈlu]; born January 28, 1940) is a Mexican business magnate, investor, and philanthropist. From 2010 to 2013, Slim was ranked as the richest person in the world. Known as the "Warren Buffett of Mexico", Slim oversees a vast business empire that is influential in every sector of the Mexican economy and accounts for 40% of the listings on the Mexican Stock Exchange.