Richest person in Singapore

Yesterday, I was on the bus which is passing by Tanglin private property and I wondered to myself: who stays in these huge houses? And what are they working as?

Hence I did a little search, and here is my finding!
The 40 richest person in Singapore!!! Can I know them???

US$6.7 billion - Ng Teng Fong, 79, property development
US$5.7 billion - Khoo Teck Phuat’s family, real estate & investment in bank
US$3.3 billion - Wee Cho Yaw & family, 78, banking: United Overseas Bank (UOB)
US$2.5 billion - Zhong Sheng Jian, 48, luxury residence development: Yanlord Land Group
US$1.1 billion - Kwek Leng Beng & family, 66, hotel & property development, finance: Hong Leong Group, CDL
US$960 million - Kuok Khoon Hong, 58, palm oil & biofuel: Wilmar
US$830 million - Peter Lim, 54, invested in Wilmar
US$650 million - Lee Seng Wee, 76, banking: OCBC
US$600 million - Denis Jen, 83, shopping malls & pork
US$595 million - Chew Hua Seng, 53, education: Raffles Education
US$590 million - Brian Chang, 64, shipyard: Yantai Raffles Shipyard
US$520 million - Tan Boy Tee, 58, tug & barge operator: Labroy Marine
US$500 million - Chua Thian Poh, 59, luxury property development: Ho Bee Investment
US$490 million - Robert Chandran, 57, marine fuel: Chemoil
US$480 million - Simon Cheong, 50, residential property development: SC Global Developments
US$475 million - Cheng Wai Keung & family, 56, property, retail & textile: Wing Tai
US$460 million - Ho Sim Guan, 81, invested in UOB
US$450 million - Lee Kian Soo, 62, services for oil & gas: Ezra Holdings
US$415 million - Ng Chwee Cheng & family, 75, construction equipment: Tat Hong
US$360 million - Kwek Leng Kee, inherited stake in Hong Leong Group
US$345 million - Olivia Lum, 46, water treatment: Hyflux
US$335 million - Ow Chio Kiat, 62, shipping, logistics, real estate
US$330 million - Margaret Lien, 65, inherited UOB shares from husband Lien Ying Chow
US$305 million - Kartar Singh Thakral, 73, real estate & consumer electronic manufacturing
US$285 million - John Chuang & family, 59, chocolate maker: Petra Foods
US$235 million - Loo Choon Yong, 58, medical service: Raffles Medical
US$230 million - Yao Hsiao Tung, 66, contract electronics manufacturing: Hi-P International
US$225 million - Wong Ngit Liong, 65, contract electronics manufacturing: Venture Corp.
US$210 million - Oei Hong Leong, 59, investor
US$200 million - Kwek Leng Peck, inherited stake in Hong Leong Group
US$195 million - Ho Kwon Ping, 55, resort & spa: Banyan Tree
US$185 million - Victor Sassoon, 49, coffee chain: Coffee Bean & Tea Leaf
US$170 million - Goh Lik Tuan, 55, contract electronics manufacturing: GES
US$165 million - David Lam, 55, shipping container: Goodpack Ltd.
US$155 million - Lee Seng Tee, banking: OCBC
US$150 million - Christina Ong, luxury fashion: Club 21
US$135 million - Ron Sim Chye Hock, 48, massage chairs: OSIM International
US$125 million - Albert H C Teo, hotel & property development: Amara Holdings
US$115 million - Raymond Goh, shipping services: Swiber Group
US$105 million - Sim Wong Hoo, 52, multimedia products: Creative Technology