| 1951 | Ong & Ong Enterprise Pte. Ltd.
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| 1952 | One Consulting Group Pte. Ltd.
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| 1953 | Orient Credit Pte Ltd
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| 1954 | Open Sesame Software Boutique Pte Ltd
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| 1955 | Odyssey Partners Limited
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| 1956 | Oph Property Limited
199405640W | 启用 |
| 1957 | Opticare International Pte Ltd
198700971N | 启用 |
| 1958 | Oshya Ltd. (06098421)
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| 1959 | Oceanway Oes Shipping Pte Ltd
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| 1960 | Offshore Construction Specialists Pte. Ltd.
200720801G | 启用 |
| 1961 | Onenine57 Pte. Ltd.
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| 1962 | On'e Mind & Body
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| 1963 | Ok Express Pte. Ltd.
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| 1964 | Ogeco21 Tech
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| 1965 | Omt Pte. Ltd.
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| 1966 | Obn 2016 Pte. Ltd.
200510459N | 启用 |
| 1967 | Oph Marymount Limited
199604897W | 启用 |
| 1968 | Osteopore International Pte. Ltd.
200311327H | 启用 |
| 1969 | Oxgate Pte Ltd
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| 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
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| 1973 | Onp Global Pte. Ltd.
201530365K | 启用 |
| 1974 | Osa Holdings (s) Pte Ltd
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| 1975 | Orwin Development Limited
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| 1976 | Oriental Garden Restaurant & Catering
52557000D | 启用 |
| 1977 | Omp Holdings Pte Ltd
199606694H | 启用 |
| 1978 | Oriimec Corporation Of Singapore Pte Ltd
199401431C | 启用 |
| 1979 | Overseas Chartering Pte Ltd
199900855K | 启用 |
| 1980 | Oid Pte. Ltd.
199301567R | 启用 |