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| 516 | Aa Plaza Llp
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| 517 | A&b Electrical Lighting Service
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| 518 | Advance Wire Cut Enterprise
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| 519 | Ah Hwee Motor Repairer
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| 532 | Ang Mo Kio Medical Hall
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| 533 | Ang Chin Moh Kheng Kee Undertakers
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| 537 | Abroad Education Services
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| 538 | Ada Maintenance Services
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| 539 | Ah Heng Co
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| 540 | Ace Weld Equipment Supplies & Services
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