| 1981 | Obs Financial Solutions Pte. Ltd.
199304758M | Active |
| 1982 | Old & Young Salon
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| 1983 | Ong Av Specialists Pte Ltd
199301969R | Active |
| 1984 | Ohb Real Estate Consultants & Services Pte Ltd
199305430M | Active |
| 1985 | Oceandale Investment Pte Ltd
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| 1986 | Oakshill Investments (s) Pte Ltd
199302530W | Active |
| 1987 | Ong Asia Limited
199301724C | Active |
| 1988 | O & Y Builders Pte Ltd
199300468R | Active |
| 1989 | Ocean Pearl Shipping & Services Pte Ltd
199300034R | Active |
| 1990 | Ocean Automation Pte Ltd
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| 1991 | Oms Holdings Pte. Ltd.
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| 1992 | O.p.v. (overseas) Singapore Pte Ltd
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| 1993 | Orgo Pte. Ltd.
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| 1994 | Oakstone Holdings Pte. Ltd.
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| 1995 | Omark Trading Singapore Pte Ltd
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| 1996 | Oh Chuan Huat Trading Pte Ltd
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| 1997 | Odc Logistics (s) Pte Ltd
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| 1998 | Oktalex Trading Pte. Ltd.
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| 1999 | Onix Dna Limited
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| 2000 | Onyo Engineering Pte Ltd
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| 2001 | Oceanfreighters Pte Ltd
199000009C | Active |
| 2002 | Ollevan Pte Ltd
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| 2003 | Ogl Pte Ltd
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| 2004 | Ocean Man United Pte Ltd
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| 2005 | Omni Marketing Global Limited
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| 2006 | Ossia Holdings Pte. Ltd.
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| 2007 | Optim Application (s) Pte Ltd
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| 2008 | Oracle Trading Pte Ltd
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| 2009 | Owap Investment Pte Ltd
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| 2010 | Orion Technology (s) Pte Ltd
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