| 1951 | Ong & Ong Enterprise Pte. Ltd.
199608424D | Active |
| 1952 | One Consulting Group Pte. Ltd.
200101135E | Active |
| 1953 | Orient Credit Pte Ltd
199404754M | Active |
| 1954 | Open Sesame Software Boutique Pte Ltd
199400871N | Active |
| 1955 | Odyssey Partners Limited
T15UF3368H | Active |
| 1956 | Oph Property Limited
199405640W | Active |
| 1957 | Opticare International Pte Ltd
198700971N | Active |
| 1958 | Oshya Ltd. (06098421)
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| 1959 | Oceanway Oes Shipping Pte Ltd
199604528R | Active |
| 1960 | Offshore Construction Specialists Pte. Ltd.
200720801G | Active |
| 1961 | Onenine57 Pte. Ltd.
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| 1962 | On'e Mind & Body
53097192E | Active |
| 1963 | Ok Express Pte. Ltd.
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| 1964 | Ogeco21 Tech
53097043X | Active |
| 1965 | Omt Pte. Ltd.
201530134M | Active |
| 1966 | Obn 2016 Pte. Ltd.
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| 1967 | Oph Marymount Limited
199604897W | Active |
| 1968 | Osteopore International Pte. Ltd.
200311327H | Active |
| 1969 | Oxgate Pte Ltd
199406893Z | Active |
| 1970 | Oni Global Brands Pte. Ltd.
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| 1971 | One Stop Mini Mart
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| 1972 | Old Man And Fox Academy
53318547E | Active |
| 1973 | Onp Global Pte. Ltd.
201530365K | Active |
| 1974 | Osa Holdings (s) Pte Ltd
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| 1975 | Orwin Development Limited
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| 1976 | Oriental Garden Restaurant & Catering
52557000D | Active |
| 1977 | Omp Holdings Pte Ltd
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| 1978 | Oriimec Corporation Of Singapore Pte Ltd
199401431C | Active |
| 1979 | Overseas Chartering Pte Ltd
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| 1980 | Oid Pte. Ltd.
199301567R | Active |