• OCBC Bank

• OCBC Bank (M) Bhd

• OCBC Trustee Ltd

• Ocean Sky Int'l  Limited

• Odds and Even Associates

• Odex Pte Ltd

• Odyssey Consulting (HK) Co Ltd

• OM Materials (S) Pte Ltd

• Omni Industries Holdings Pte Ltd 

• Ondeo Services (M) Sdn Bhd

• OneEmpower Pte Ltd

• Ong & Ong Architects Pte Ltd

• Ong Tong Wang & Co

• Ontraq Management Pte Ltd

• Orange Business Services

• Oriental Coffee & Commodities

• Oriental Food (Holdings) Ltd

• ORIX Capital Ltd

• Osmap Asia Pacific Pte Ltd

• Otis Elevator Co.

• Oxy-Dry Asia Pacific Inc.