Carlos Slim Helú (born January 28, 1940) is a Mexican business magnate, investor, and philanthropist. Slim has been ranked by Forbes as the richest person in the world since 2010. His extensive holdings in a considerable number of Mexican companies through his conglomerate, Grupo Carso, SA de CV, have amassed interests in the fields of communications, technology, retailing, and finance. Presently he is the chairman and chief executive of telecommunications companies Telmex and América Móvil. América Móvil, which in 2010 was Latin America’s largest mobile-phone carrier, accounted for around US$49 billion of Slim's wealth by the end of 2010. His corporate holdings as of March 2013 have been estimated at US$73 billion.