Bloomberg Billionaires Index

View profiles for each of the world’s 500 richest people, see the biggest movers, and compare fortunes or track returns.

# 307 Simon Reuben $6.30B

Random fact: Part-owns London nightclub 5 Hertford Street.


Reuben is a Monaco-based investor who shares interests in technology and real estate with his billionaire brother, David. The siblings own 24% of Global Switch, operator of data centers in Asia and Europe. They own prime real estate across Europe including a London mansion that they are converting into a luxury hotel.

As of :
Last change No change
YTD change +$50.0M ( +0.8%)
Industry Diversified
Biggest asset Cash
Citizenship United Kingdom
Age 78
Wealth Self-made
View net worth over:   Max 1 year 1 quarter 1 month 1 week

Relative Value

Simon Reuben's net worth of $6.30B can buy ...

troy ounces of gold
barrels of crude oil

... and is equivalent to ...

of the GDP of the United States
of the total wealth of the 500 richest people in the world
of the top 100 U.S. college endowments
of the top 200 U.S. executives’ total awarded compensation
of U.S. existing home sales
times the median U.S. household income

Latest News

Net Worth Summary

Private asset
Public asset
Misc. liabilities
Confidence rating:

Reuben and his brother Simon share a 24% stake in closely held data center provider Global Switch. The London-based company has about 10 data centers in Europe and Asia, according to its website. It's valued using the 2.1 billion pounds ($2.8 billion) paid by Asian investors for a 25% stake in the business, according to a July 2018 report.

The value of Reuben's cash investments accounts for the sale and purchase of assets, including the sale of two stakes in Global Switch, as well as taxes, market performance and the cost of his investments. Spokesman Charles Stewart-Smith confirmed the pair share the businesses equally.

They also have U.K. real estate, according to a Bloomberg analysis of property records. Their property holdings include the former In and Out Club in London's Mayfair neighborhood that they bought for more than $200 million in 2011. The value of their holdings is based on price data for the relevant London districts published by brokers Savills, Colliers International, real estate data provider IPD and property developer Grosvenor.

The brothers hold a range of other closely held investments in transportation, leisure, mining, banking and technology, including airports, pubs, hotels and racetracks. These are valued using acquisition cost, valuations of comparable peers or book value and included in the cash balance.


Birthdate: 6/25/1941
Family: Married, 1 child
Education: Sir John Cass College

Simon Reuben was born in Mumbai, then called Bombay, in 1941, three years after the birth of his brother David. The sons of Jewish parents from Iran, the pair moved to London as teenagers. Simon bought the U.K.'s oldest carpet maker in 1965, revitalized the company and used the proceeds to make his first real estate investments in London. He teamed up with elder brother David in 1977, and the siblings founded metal trader Trans-World.

They established a Russian office in 1991, and, with the help of partner Lev Chernoy, bought controlling stakes in Russian and Ukrainian aluminum plants. Five years later, they were the world's third-largest producer of the metal, with sales reaching $6 billion in 1997. The company was criticized by Russia's politicians and media, who attacked the Trans-World's profit margins.

Faced with fines from Moscow and a coterie of disgruntled ex-managers who were maneuvering to take control of their smelters, the brothers sold their interest in the company in 2000 for $250 million to billionaire Oleg Deripaska, and invested the proceeds in real estate, leisure interests and technology companies.

In 2007, they bought full control of Global Switch, a data center company that now has nine data centers around the world. The pair acquired a dilapidated mansion in London's Mayfair neighborhood for $200 million cash that they plan to develop into a luxury hotel. They also established a namesake foundation focused on education and poverty relief, endowing it with $100 million in 2002.

Reuben lives in Monaco with his wife, Joyce. The couple have a daughter, Lisa.

  • 1941 Born in Bombay to Jewish parents who'd moved to India from Iran.
  • 1977 Starts metal trading company Trans-World with brother David.
  • 2000 Reuben brothers sell interest in Trans-World for $250 million.
  • 2003 Portfolio of shopping centers purchased worth more than $480 million.
  • 2006 Sells 50 percent stake in London's Olympic City site for $200 million.
  • 2007 Acquires 100 percent of data center operator Global Switch.
  • 2011 Buys London's In and Out Club to redevelop as a luxury residence.
  • 2016 Sells 49 percent stake in Global Switch for $3 billion.