| 391 | Omnititan Venture Pte Ltd
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| 392 | Oculus Ltd
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| 393 | Oh Huat Hin Sesame Oil Mfr
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| 394 | Og Pte Ltd
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| 395 | Om Automation Pte Ltd 199905391G | Active |
| 396 | Oh Guan Hing Sesame Oil Fty Pte Ltd
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| 397 | Ohm Engineering Pte Ltd 198500785N | Active |
| 398 | One Source Distribution Pte. Ltd. 200405694Z | Active |
| 399 | O S Electronics (s) Pte Ltd 199002317H | Active |
| 400 | Omni United (s) Pte. Ltd. 200009388W | Active |
| 401 | Omnitec Services Pte Ltd
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| 402 | Omex Pte Ltd 199605322W | Active |
| 403 | Officina Meccanica Sestese (S) Pte Ltd
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| 404 | Oiltex Pte Ltd 199408668Z | Active |
| 405 | Ohmm Pte. Ltd. 200703766R | Active |
| 406 | One Nine Seven Six Pte. Ltd. 200802377H | Active |
| 407 | Omg (S) Pte Ltd
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| 408 | Old Chang Kee
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| 409 | Oh's Farm Catering Pte. Ltd. 200400662W | Active |
| 410 | Offshore Construction Services Pte Ltd 199106444W | Active |
| 411 | Ocean Sky Int'l Ltd
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| 412 | Ocean Properties Pte Ltd
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| 413 | One Ninety Bar
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| 414 | Ogawa Health Care Pte. Ltd. 200208302C | Active |
| 415 | Odessa 09924900J | Active |
| 416 | O S Electrical & Refrigeration Trading 40884900B | Active |
| 417 | Omron Electronic Components Pte Ltd 200003080H | Active |
| 418 | One Stop Docutech 52873037A | Active |
| 419 | Oriv Marketing Pte Ltd 199200794K | Active |
| 420 | Oshima Engineering & Trading Pte. Ltd. 200307254Z | Active |