British businessmen David & Simon Reuben has an estimated net worth of $10.7 billion each in December 2016 according to Bloomberg.

Born in India but raised in the UK, Simon Reuben started making money by buying real estates and importing carpets. On the other hand, David Reuben began making his fortune by trading metals. Eventually, the two collaborated in Transworld, which is a metal trader investing in Kazakhstan and Russia in the 1990's.

In addition to their metal business, the dynamic duo also invests in UK real estate. They have plans of turning the Mayfair estate of In and Out Club into a 35,000 bottle winecellar and a 48-bedroom residence. This would be later acknowledged as UK's most expensive private residence.

They also own GlobalSwitch, a data center business, which is now experiencing a significant expansion in Singapore, Sydney and Hong Kong. They also run the Reuben Foundation which seeks to help educational and health care causes. Currently, Simon Reuben is based in Monaco while his brother David lives in Florida and Monaco.