Due to the strength of the Singapore economy that began to be built in the 1960s after Singapore gained its independence from Great Britain, Singapore partnered with South Korea, Taiwan and Hong Kong to become the Four Asian Tigers. These four countries came together to increase their trade. As a result, this helped to strengthen their economies.
Once this happened, then Singapore became a great place for companies to be built and managed. Therefore, many companies would make their headquarters there. Singapore is also located in a central place in order to be able to travel fast to other areas. They would have access to everything they needed especially if many other companies are being built and business is being conducted in the same country.