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| 962 | Oak Hill Capital Limited S99UF0070G | Active |
| 963 | Ortek International Pty Limited S93UF0012E | Active |
| 964 | Ong Brothers Packing Contractor 52803352B | Active |
| 965 | Overseas Investments Company Ltd S81UF0033J | Active |
| 966 | Onvia Resources Pte. Ltd. 201306568H | Active |
| 967 | Oversea Fishery & Investment Co. Ltd. S79UF0127E | Active |
| 968 | Onapal Ltd S77UF0082K | Active |
| 969 | Ogilvy Public Relations Worldwide 52871634D | Active |
| 970 | Ocean Com Electronics 52864809L | Active |
| 971 | One Stop Express 52807019C | Active |
| 972 | Offshore Development Group Ltd T14UF3350H | Active |
| 973 | Ock Electrical Services 52871960B | Active |
| 974 | Orchid Alliances Pte. Ltd. 201603458D | Active |
| 975 | Ong Plumbing 52801523X | Active |
| 976 | Overseas Drilling Holdings Ltd T14UF3368C | Active |
| 977 | Owwi Limited T06UF3154F | Active |
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| 980 | Origins Dining & Catering 52867791L | Active |
| 981 | Ocean Power Holdings Ltd T07UF1480L | Active |
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