| 901 | Optic Focus 52874356B | Active |
| 902 | Orange Realty Services 52863044W | Active |
| 903 | Optics And Photonics Society Of Singapore S94SS0029C | Active |
| 904 | Our Kids Place International Preschool 51391000W | Active |
| 905 | Om Cricket 53130418C | Active |
| 906 | Ooi Agencies 52869521E | Active |
| 907 | Ong Kim Eng Insurance Agency 52871262D | Active |
| 908 | Oxley Mansion Owners' Association S94SS0142K | Active |
| 909 | Open Hand Christian Fellowship S99SS0018E | Active |
| 910 | Oyt Trading 51012000L | Active |
| 911 | Oheng Trading 52841269L | Active |
| 912 | Osteoporosis Society (singapore) S96SS0085D | Active |
| 913 | Orchid Training Consultant 52867293B | Active |
| 914 | Oh Seng Tian Hardware 52889860D | Active |
| 915 | Ohms Mobile Service Pte. Ltd. 201509011M | Active |
| 916 | Orchid Executive Support 52908697B | Active |
| 917 | Ong Departmental Store 52897514E | Active |
| 918 | Organic Fit For Life Food 52901569B | Active |
| 919 | One Art Studio 53079207M | Active |
| 920 | Ong Yong Lee Transport 52815621K | Active |
| 921 | Oriental Pearl Business Services 52813716J | Active |
| 922 | Ocean Apartments Owners' Association S98SS0020D | Active |
| 923 | Ohoh Enterprise 52904251K | Active |
| 924 | Ogm & Associate 52893960B | Active |
| 925 | Onus Group Pte. Ltd. 201530256N | Active |
| 926 | Okc Interior Decoration 52814571A | Active |
| 927 | Our Bus Service 52832114E | Active |
| 928 | Openbucks Pte. Ltd. 201524970D | Active |
| 929 | Oak Tree Books Distribution 52986525D | Active |
| 930 | Osteoporosis Support Society S98SS0082D | Active |