| 511 | Quilington Limited T11UF4077D | Active |
| 512 | Quick Result Holdings Limited T11UF3471A | Active |
| 513 | Quadria Capital Fund L.p. T13UF3942B | Active |
| 514 | Quann Network Security Services Pte. Ltd. 199205045W | Active |
| 515 | Qbe Marine And Energy Services Pte. Ltd. 200800484K | Active |
| 516 | Q Communications Pte. Ltd. 201412460D | Active |
| 517 | Qiankun Machinery Singapore Pte. Ltd. 201213368E | Active |
| 518 | Quasar International Group Pte. Ltd. 201505170G | Active |
| 519 | Queen's Marine (pte.) Ltd. 200721665N | Active |
| 520 | Quality Foods & Packaging Industries Pte. Ltd. 200808498W | Active |
| 521 | Qi Shia Hing Food Holdings Pte. Ltd. 200722600Z | Active |
| 522 | Qcn Global Pte. Ltd. 200720610Z | Active |
| 523 | Qplay Global Pte. Ltd. 200720505G | Active |
| 524 | Qi Media Pte. Ltd. 201532503N | Active |
| 525 | Qrinno Pte. Ltd. 200721737M | Active |
| 526 | Queen's Jeweller Pte Ltd 199503058C | Active |
| 527 | Qantas Freight Enterprises Limited T10UF1718F | Active |
| 528 | Questvest (s) Pte Ltd 199504337E | Active |
| 529 | Queen's Road Central Holdings Limited T10UF1653L | Active |
| 530 | Qingan Shipping Pte Ltd 199500363N | Active |
| 531 | Qualitek Precision Tooling (s) Pte Ltd 199500457Z | Active |
| 532 | Qjy Ooh Holding Company Limited T10UF0340K | Active |
| 533 | Qoomart 53331915C | Active |
| 534 | Quadra Investments Pte. Ltd. 201607087W | Active |
| 535 | Qel Holdings Sdn Bhd T10UF0317L | Active |
| 536 | Qanopus Investments Ltd. T10UF0569K | Active |
| 537 | Qu Qian Pte Ltd 199603716N | Active |
| 538 | Qq Bbq Seafood 53332227L | Active |
| 539 | Qq Group Pte. Ltd. 201507841N | Active |
| 540 | Qq Limousine Services 53293532B | Active |