Carlos Slim (net worth: $45.7 billion)

Known as the “Warren Buffett of Mexico,” Slim was ranked as the richest person of the world from 2010 to 2013. Slim controls America Movil, the largest mobile-phone operator in the Americas. He has holdings in banking and mining, as well as stakes in publicly traded companies, including Philip Morris, The New York Times, and Caixabank. Through the family vehicle Grupo Carso, he also has interests in the Mexican construction industry.