| 481 | Uni Engineering Works
49593200X | Active |
| 482 | Uyi (sin) Services
37774300C | Active |
| 483 | Unistar Engineering
40920300M | Active |
| 484 | Uf Technology
49192500W | Active |
| 485 | Universal Engineering & Inspection Services (s) Pte. Ltd.
200912560K | Active |
| 486 | Uwa Engineering Pte Ltd
| Active |
| 487 | Utracon Infrastructure Pte. Ltd.
200905769H | Active |
| 488 | Unison Construction Pte. Ltd.
200911922D | Active |
| 489 | Uniquetech Pte. Ltd.
200204966D | Active |
| 490 | Uni Equipment & Engineering
37206600C | Active |
| 491 | Urbn Interiors Pte. Ltd.
200805240H | Active |
| 492 | Unify Engineering Services Pte. Ltd.
200805601G | Active |
| 493 | United Tiles And Stone Works Pte. Ltd.
200705498E | Active |
| 494 | United Works Pte. Ltd.
200716702D | Active |
| 495 | U Hup Roller Shutter & Engineering Works
52967632W | Active |
| 496 | Unitex Engineering Pte. Ltd.
200920759K | Active |
| 497 | Uv Resources Pte. Ltd.
200614912H | Active |
| 498 | Unique Aluminium Enterprise
34208500W | Active |
| 499 | Ulma Formwork Singapore Pte. Ltd.
200804438R | Active |
| 500 | Unix Building Material (s) Pte. Ltd.
200515702Z | Active |
| 501 | United Sea Resources Pte. Ltd.
200512422M | Active |
| 502 | United Alliance Pte. Ltd.
200613830C | Active |
| 503 | Utica Private Limited
200806645W | Active |
| 504 | Uni Engineering Pte. Ltd.
200611949N | Active |
| 505 | Uis Asia Trading Pte. Ltd.
200612260R | Active |
| 506 | United Force Engineering Pte. Ltd.
200817991R | Active |
| 507 | Urban Wave Builder Pte. Ltd.
200809042G | Active |
| 508 | Upm Technology Pte. Ltd.
200515159M | Active |
| 509 | Uvw Building Services Pte. Ltd.
200815958H | Active |
| 510 | United Integrated Engineering Pte. Ltd.
200416949H | Active |