He is the chairman and chief executive of telecommunications companies Telmex and América Móvil
It is said that under his father’s guidance, Slim bought his first shares in a Mexican bank at the age of 12.
He also started working at his father’s company at the age of 17, earning 200 pesos (roughly $15) a week.
His New York City mansion, Duke Seaman’s mansion which he bought for $44 million in 2010 has 12 bedrooms, 14 bathrooms and a doctor’s office in the basement.
He was ranked fifth on Forbes ‘World’s Biggest Givers’ list in May 2011. By 2010, he had donated about $8 billion of dividends to Fundacion Carlos Slim Helu which sponsors a private museum in Mexico City.