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| 1983 | Overseas Education Consultancy Pte Ltd
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| 1984 | Orix Aircraft Corporation
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| 1985 | Ong Eng Siang Trading
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| 1986 | Orient Hero (asia) Limited
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| 1987 | Ooffle Pte. Ltd.
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| 1988 | Oocl Logistics (singapore) Pte. Limited
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| 1990 | Options Publications Pte Ltd
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| 1992 | One Earth Holdings Pte. Ltd.
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| 1993 | Onesta Consultancy & Management Service
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| 1996 | Og Global Venture Pte. Ltd.
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| 1997 | One Junction Private Limited
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| 1998 | One Gym Global
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| 2000 | Optimal Solution Pte. Ltd.
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| 2001 | One Voucher Resources Pte. Ltd.
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| 2002 | Olive Tree International Search
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| 2003 | Oriental Maya (s'pore) Pte. Ltd.
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