Mark Zuckerberg Named U.S Richest Man Under 40

Mark Zuckerberg was named number one richest man under the age of  40 in US, in Forbes magazine’s run down of the most successful young entrepreneurs in the US.

His fortune has climbed to $47billion, according to a list of the richest people in the US under the age of 40.

The 31-year-old Harvard graduate is more than four times wealthier than the second-richest on the top ten list – Facebook co-founder Dustin Moskovitz who is estimated to have $9.7billion.

Third on the list was Jan Koum, the 39-year-old Whatsapp founder who is estimated to be worth $8.8billion according to Forbes.