| 511 | Qingdao Wubin International Trade Company T10UF1083C | Active |
| 512 | Qhse Services 53331703K | Active |
| 513 | Q Squared Solutions Pte. Ltd. 201105251M | Active |
| 514 | Quick & Best Electrical Engineering Pte Ltd 199804377G | Active |
| 515 | Qualisys Consultancy Services (singapore) Pte Ltd 199805401D | Active |
| 516 | Queenton Limited T10UF0060C | Active |
| 517 | Q Lox Ltd. T09UF2958H | Active |
| 518 | Qatar Petroleum International Limited T09UF3183G | Active |
| 519 | Quoin Makan Pte. Ltd. 201538374D | Active |
| 520 | Quest Fortune Limited T09UF3356F | Active |
| 521 | Qsoft Pte. Ltd. 201538399D | Active |
| 522 | Qlogic International Ltd T09UF2678A | Active |
| 523 | Qubit Pte Ltd 199601098D | Active |
| 524 | Qnet Limited T10UF0473D | Active |
| 525 | Qk Exhibition Pte. Ltd. 201104293H | Active |
| 526 | Quayside Enterprises (singapore) Pte Ltd 199406098W | Active |
| 527 | Quan Mei Singapore Pte Ltd 199403712D | Active |
| 528 | Qualif Pte Ltd 199407234D | Active |
| 529 | Qcd Electronics Pte Ltd 199405395M | Active |
| 530 | Quarry Manufacturing And Supplies (s) Pte Ltd 199400947R | Active |
| 531 | Quanrong Infrastructure Pte. Ltd. 199405309C | Active |
| 532 | Quartus Bay Pte Ltd 199408186K | Active |
| 533 | Qigong Evergreen Health (s) Pte Ltd 199406848K | Active |
| 534 | Qas Systems Pte Ltd. 199405249W | Active |
| 535 | Quyan Holdings Limited T11UF4032D | Active |
| 536 | Queen's Market Pte. Ltd. 201219777D | Active |
| 537 | Quilington Limited T11UF4077D | Active |
| 538 | Quick Result Holdings Limited T11UF3471A | Active |
| 539 | Quadria Capital Fund L.p. T13UF3942B | Active |
| 540 | Quann Network Security Services Pte. Ltd. 199205045W | Active |