Kwek is the chairman of City Developments Limited (CDL), an international property and hotel conglomerate and the leading real estate developer in Singapore. It operates in 20 countries in Asia, Europe, North America and Australasia. CDL has over 250 subsidiaries and associated companies including 8 companies listed on the stock exchanges of Singapore, London, Hong Kong, Amsterdam, New Zealand and Manila. CDL has a market capitalization of US$5.8 billion and ranks just outside Singapore's top 10 listed companies. It is also the second-biggest property developer in Southeast Asia.