Another member of the Silicon Valley set, Jan Koum built up
his fortune as the co-founder of WhatsApp, with the app
selling for a staggering $22 billion (£17.62bn) to Facebook in
2014. The messaging mogul could do with some sweet talk,
though, as he's yet to find love and remains single.
Gina Rinehart, 65: $15.3 billion (£11.8bn)
An iron ore mogul and Australia's richest citizen, Rinehart
may have been searching for someone to win her heart after
she was tragically widowed in 1990. The businesswoman
made her fortune from the cattle as well as mining
industries, turning around her father's business. Hancock
Prospecting was worth $75 million (£57.4m) at the time of
his death, whereas today Rinehart alone is worth $15.3
billion (£11.8bn).
Wang Sicong, 31, future net worth: $22.6 billion
(£17.3bn)
The only son of China's fourth richest man Wang Jianlin, 31-
year-old Wang Sicong might be in line for fortune but that
doesn't mean he's ready to settle down. Known as a bit of a
serial dater, he's thought to have had between 11 and 15
girlfriends in the past and openly embraces his party-hard,
playboy persona.
Sergey Brin, 45, net worth: $51.6 billion (£39.7bn)
As the 14th richest person on the planet, Brin is one of the
wealthiest singletons out there. The Google co-founder now
works as president of Alphabet, Google's parent company,