Carlos Slim Helú (born January 28, 1940) is a Mexican business magnate, investor, and philanthropist with Lebanese ancestry. 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. He derived his fortune from his extensive holdings in a considerable number of Mexican companies through his conglomerate, Grupo Carso. The conglomerate comprises a diverse portfolio of businesses from a wide array of industries that include telecommunications, education, health care, industrial manufacturing, food and beverages, real estate, airlines, media, mining, oil, hospitality, entertainment, technology, retail, sports and financial services. Currently, Slim is the chairman and chief executive of telecommunications companies Telmex and América Móvil.