| 1921 | Origin Energy Geothermal Holdings Pty Limited
T10UF1018C | 启用 |
| 1922 | Oriental Supply Pte Ltd
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| 1923 | Ohmsound Pte. Ltd.
201607064Z | 启用 |
| 1924 | Orange Seed Holding Pte. Ltd.
201607220N | 启用 |
| 1925 | Ozura Interactive Sdn Bhd
T10UF1152E | 启用 |
| 1926 | Ordino Investments Pte Ltd
199505406G | 启用 |
| 1927 | Originex Networks Sdn Bhd
T10UF0226G | 启用 |
| 1928 | One Global International Limited
T11UF4514G | 启用 |
| 1929 | Oilmac Engineering & Services Pte Ltd
199800613E | 启用 |
| 1930 | Oaktree Properties Pte Ltd
199605121W | 启用 |
| 1931 | Orientdeal Pte. Ltd.
201503459K | 启用 |
| 1932 | O.e.b. Properties Pte Ltd
199603606G | 启用 |
| 1933 | Oaktree International (hk) Limited
T16UF1834J | 启用 |
| 1934 | Okada Ecotech Pte Ltd
199805584M | 启用 |
| 1935 | Occident Technologies Pte. Ltd.
199605108H | 启用 |
| 1936 | Ocean Fine Pte Limited
199606217C | 启用 |
| 1937 | Odyssey Maritime Pte. Ltd.
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| 1938 | Orion Consulting Pte Ltd
199702382H | 启用 |
| 1939 | Octet Pte. Ltd.
200814208G | 启用 |
| 1940 | Oaklands Engineering Solutions Limited (08038781)
T15UF3308L | 启用 |
| 1941 | Orient Giant Group Limited
T15UF3235C | 启用 |
| 1942 | Octo Tech Precision Pte Ltd
199608502K | 启用 |
| 1943 | Ocean Oriental Singapore Pte Ltd
199900992D | 启用 |
| 1944 | Oilim Global Synergy Pte. Ltd.
201221688Z | 启用 |
| 1945 | Ocean Power International Pte. Ltd.
200617066N | 启用 |
| 1946 | Oculex Asia Pharmaceuticals Pte Ltd
199508301G | 启用 |
| 1947 | Ong Chin Lee Construction Pte Ltd
199400342N | 启用 |
| 1948 | Ong Kee Gee Holdings Pte Ltd
199602204K | 启用 |
| 1949 | Openix Pte Ltd
199605756W | 启用 |
| 1950 | Ocs Training Institute (singapore) Pte. Ltd.
201530548G | 启用 |