One of the largest port operators in the world, PSA's portfolio comprises over 70 deepsea, rail, and inland terminals across more than 180 locations in 45 countries, including flagship operations in Singapore and Belgium, and encompasses supply chain solutions, marine, and digital businesses.

They later reached the 5 million TEU mark by 1990, making Singapore the world’s largest container port at the time.

[4][5] A parliamentary bill was passed on 25 August 1997, to turn the Port of Singapore Authority, a state organisation into an independent commercial company.

In order to focus on its core port business, PSA Corporation set up The HarbourFront Limited (present day Mapletree) on 7 December 2000, to spearhead development of its properties.

PSA Marine owns and operates a fleet of over 80 vessels in Singapore, Malaysia, Hong Kong, mainland China, India, Australia, Panama, Peru and Oman.