10. Ong Beng Seng and Christina Ong, $2.4B
Ong Beng Seng (73) and Christina Ong (69) are a power couple – both of whom have equally impressive portfolios.
Managing director of Hotel Properties Limited (HPL), Ong Beng Seng controls many businesses and is an established hotelier. His investments are also said to be worth tens of millions of dollars. He is also known for his role in bringing the Formula One (F1) race to Singapore.
Christina Ong owns fashion chain Club 21 and franchise rights to a number of high fashion labels, and also heads the COMO Group. Also a hotelier herself, she is nicknamed the “Queen of Bond Street” due to the properties she owns on Bond Street in London.