| 1951 | Oiltrans Services (s) Pte Ltd
198700229R | Active |
| 1952 | On The Green Sports (1987) Pte Ltd
198704065Z | Active |
| 1953 | Omni Marketing Group,asia Pte Ltd
198700136C | Active |
| 1954 | Oceangrand Chartering (singapore) Pte. Ltd.
200903296H | Active |
| 1955 | Open D Group International Limited
T11UF3585C | Active |
| 1956 | Openschoolbag Pte. Ltd.
201316495W | Active |
| 1957 | Oris Singapore Pte. Ltd.
199006219C | Active |
| 1958 | Oudi Box
53325388L | Active |
| 1959 | Ogura Construction (singapore) Pte Ltd
198701399R | Active |
| 1960 | Oriental Great Dragon Investment & Development Pte Ltd
199303006H | Active |
| 1961 | Octoshape Aps
T11UF5032F | Active |
| 1962 | Ohm Overseas Projects Pte Ltd
198702453K | Active |
| 1963 | Oregan Networks Pte. Ltd.
201303857Z | Active |
| 1964 | Oji Interpack Singapore Pte. Ltd.
198704014E | Active |
| 1965 | Osl Shipping Limited
T12UF0005G | Active |
| 1966 | One97 Communications Ltd
T11UF2075H | Active |
| 1967 | Omya Holding Ag
T11UF4844F | Active |
| 1968 | Oil Marketing & Trading International
T11UF3991K | Active |
| 1969 | Orion Engineered Carbons International Gmbh
T11UF3985L | Active |
| 1970 | Oh Hup Huat Sesame Oil
37774700M | Active |
| 1971 | Orix Holdings Limited
T11UF2099B | Active |
| 1972 | Oman Trading International Ltd.
T11UF0684C | Active |
| 1973 | Olfi Lux Holdings Sarl
T11UF5054H | Active |
| 1974 | Ovd Kinegram Ag
T12UF0006C | Active |
| 1975 | Oak Unipro Solutions Pte. Ltd.
201313649W | Active |
| 1976 | Orbit Peripherals Pte Ltd
199004577G | Active |
| 1977 | Osf Transport Services
53232543E | Active |
| 1978 | On The Ball Consulting
53136115B | Active |
| 1979 | Ohana Holdings Pte. Ltd.
200201159W | Active |
| 1980 | Orchard Maharajah Restaurant Pte Ltd
199003148E | Active |