| 541 | Yu Chun Engineering & Construction
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| 542 | Yme Link S'pore Pte Ltd
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| 543 | Ymc Marine Pte Ltd
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| 544 | Ying Tat Interior & Renovation
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| 545 | Yong Seng Fibreglass
22859800A | 启用 |
| 546 | Yokosin Marine Co Pte Ltd
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| 547 | Ysl Holdings Pte Ltd
198403265C | 启用 |
| 548 | Yoke Mah Plasterceil Pte. Ltd.
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| 549 | Ysh Pte Ltd
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| 550 | Yong Leng Trading Company
21519000M | 启用 |
| 551 | Yokosin Automation Pte. Ltd.
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| 552 | Yokogawa Engineering Asia Pte Ltd
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| 553 | Yong Metal Trading
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| 554 | Yangzijiang International (s) Pte Ltd
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| 555 | Yellowschoolbus.com Pte Ltd
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| 556 | Yinda Technology Singapore Pte. Ltd.
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| 557 | Y. H. H. Engineering Pte Ltd
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| 558 | Yangtze Construction And Engineering Pte Ltd
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| 559 | Yee Hong Pte Ltd
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| 560 | Yenn Dar Pte Ltd
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| 561 | Yaw Eng Construction Pte Ltd
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| 562 | Yao Xing Pte. Ltd.
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| 563 | Yclee Construction Engineering Pte. Ltd.
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| 564 | Yeo Heng Electrical Works
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| 565 | Yao Peng Yam Construction
37602300K | 启用 |
| 566 | Yew Hing Construction & Renovation
53072008J | 启用 |
| 567 | Yap & Lu Plumbing Contractor
53173603B | 启用 |
| 568 | Y & B Plumbing & Sanitary Contractor
53058810B | 启用 |
| 569 | Y K Contractor
53021477J | 启用 |
| 570 | Ye Da Qiu Services & Renovation
53012483A | 启用 |