| 511 | Yang Yun Xin Bus Service
44258900W | 启用 |
| 512 | Yang Marine Automation Pte. Ltd.
201000267E | 启用 |
| 513 | Yang Hua Cake House
52850995X | 启用 |
| 514 | Yacht Construction (sea) Pte Ltd
198803876G | 启用 |
| 515 | Yew Huat Scaffolding Work
26539600W | 启用 |
| 516 | Yang Tai Hardware & Engineering Co
25426900A | 启用 |
| 517 | Yat Guan Investment Pte Ltd
199104874C | 启用 |
| 518 | Yeo Trailer Engineering & Trading
49458100W | 启用 |
| 519 | Yancey Huang (private) Limited
196700053H | 启用 |
| 520 | Yeow Hwa Engineering Pte Ltd
198304889K | 启用 |
| 521 | Yap Sun Hardware Mfy Pte Ltd
199002839H | 启用 |
| 522 | Yew Eng Trading Company
08435800M | 启用 |
| 523 | Yek Hin Machinery Pte. Ltd.
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| 524 | Yee Lee Pte Ltd
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| 525 | Yeung Yew Pte. Ltd.
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| 526 | Yew Aik (s) Pte Ltd
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| 527 | Yargay Mci Pte. Ltd.
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| 528 | Yen Thiam Construction Pte Ltd
198700003R | 启用 |
| 529 | Yan Tong Credit Pte. Ltd.
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| 530 | Yn Electrical & Trading
51135900D | 启用 |
| 531 | Yong Seng Keat Electrical Engineering
21244000D | 启用 |
| 532 | Yutaka Pte Ltd
197800738H | 启用 |
| 533 | Yu Chun Engineering & Construction
35649100E | 启用 |
| 534 | Yme Link S'pore Pte Ltd
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| 535 | Ymc Marine Pte Ltd
199402701D | 启用 |
| 536 | Ying Tat Interior & Renovation
52863220E | 启用 |
| 537 | Yong Seng Fibreglass
22859800A | 启用 |
| 538 | Yokosin Marine Co Pte Ltd
198004533G | 启用 |
| 539 | Ysl Holdings Pte Ltd
198403265C | 启用 |
| 540 | Yoke Mah Plasterceil Pte. Ltd.
200909528D | 启用 |