10 (-) Ong Beng Seng, 65, and Christina Ong, 61
US$700 million
(Hotel Properties, Club 21)

One of Singapore’s most influential couples is now listed here together. Mr Ong, a Malaysian citizen, is managing director of HPL. His Singaporean wife runs Como Hotels & Resorts and retail empire Club 21.

Photos: ST, Lau Fook Kong; BT, Arthur Lee CH