They have made their fortune
from the private equity business - asset stripping by any other name.
The Weisfelds made their fortune
from cut-price chain What Every Woman Wants before selling out for pounds 47million.
The Guggenheims made their fortune
by cornering the market in copper mines; Peggy Guggenheim once cornered the market in avant-garde art, before the rest of the world came along to undo her monopoly.
The billionaires who appear in the ranking have made their fortunes
in many sectors, including banking, food, beverages, pharmaceutical, insurance, retail, among others.
Expats from the sub-continent have made their way to the deserts of Arabia looking for greener pastures for decades, including the UAE, and have made their fortunes
in recent decades.
And, in the largest openly gay gift to an American university ever, David Goodhand and Vincent Griski, a gay couple who met at the University of Pennsylvania and who made their fortunes
at Microsoft and Goldman Sachs, respectively, donated $2 million to the school for a new building that will house the old gay and lesbian resource center, student offices, and meeting spaces.
Philip Beresford, who has compiled the Rich List for the past 12 years, said: 'Probably, the most striking fact revealed is just how few people made their fortunes
since the industrial revolution, let alone since the Second World War.'