Bloomberg Billionaires Index

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#377 Simon Reuben $4.80B

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


Reuben is a Monaco-based investor with interests in technology, real estate and leisure that are managed by holding companies he controls with his billionaire brother, David. The siblings control Global Switch, operator of 10 data centers in Europe and Asia, and are converting a Mayfair mansion into a luxury London hotel.

As of July 24, 2017:
Last change No change
YTD change -$329M (-6.4%)
Industry Diversified
Biggest asset Global Switch
Citizenship United Kingdom
Age 76
Wealth Self-made
View net worth over:   Max 1 year 1 quarter 1 month 1 week

Relative Value

Simon Reuben's net worth of $4.80B 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 owns a 26 percent stake in closely held data center provider Global Switch, which he controls with his brother, Simon. The London-based company has ten data centers in Europe and Asia. It's valued using the 2.4 billion pounds paid by Chinese investors in December 2016 for a 49 percent stake in the business, according to a company statement. Global Switch was previously valued in this analysis by using the average price-to-book value multiple of three publicly traded peer companies: DuPont Fabros Technology, CyrusOne and Asia Pacific Data Centre Group. The change in valuation approaches led to a $1.4 billion fall in Reuben's net worth on Dec. 22, 2016.

The Reubens also have real estate holdings in central London, throughout England and outside the U.K. 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, and are converting into a luxury hotel. The value of their holdings is based on 2015 real estate values for the more than 20 properties they are known to hold, and prices for 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. The siblings also control 10 percent of Hamilton, Bermuda-based hotel chain Belmond, which owns Orient Express Hotels and each are credited with half of the stake. The value of Reuben's cash investments account for dividend income, insider transactions, taxes and market performance less the cost of his investments.


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 Ukranian 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.