| 841 | Yong Kiat Heng Engineering Construction 52685200C | Active |
| 842 | Yi Leather 53286514J | Active |
| 843 | Yio Chu Kang Zone `8' Residents' Committee S83SS0046F | Active |
| 844 | Yio Chu Kang Zone `9' Residents' Committee S83SS0045K | Active |
| 845 | Yama Medical Supplies 52870635K | Active |
| 846 | Yong Lee Huat Awning And Renovation 52512300L | Active |
| 847 | Y & T Air Conditioning Service 52801018B | Active |
| 848 | Yio Chu Kang Zone `4' Residents' Committee S82SS0084G | Active |
| 849 | Yuan Meng Shih Temple S97SS0138G | Active |
| 850 | Yio Chu Kang Constituency Citizens' Consultative Committee S81SS0104H | Active |
| 851 | Yio Chu Kang Zone `7' Residents' Committee S82SS0088B | Active |
| 852 | Yong Lee Engineering & Construction 52798851X | Active |
| 853 | Yong Marble General Contractor 52792600X | Active |
| 854 | Yong Ka Aluminium Renovation Works 52870205W | Active |
| 855 | Yellow Directory 52871079J | Active |
| 856 | Yeo Yee Chee Chinese Medical Hall 52812657A | Active |
| 857 | Yi Yi Bu She Boutique 52876551E | Active |
| 858 | Yiyi Traditional Treatment 52868934K | Active |
| 859 | Yen Nee Book Store 52800673L | Active |
| 860 | Yamasa Incorporation Pte Ltd 199802506D | Active |
| 861 | Yi May Hair & Beauty Saloon 52876501M | Active |
| 862 | Yong Sheng Food Catering 52880426W | Active |
| 863 | Yeshua Resource 52812901E | Active |
| 864 | Yu Hang Trading 52875358D | Active |
| 865 | Yong Yow Marketing 52867790W | Active |
| 866 | Yitong Technologies 53238522E | Active |
| 867 | Yong Hup Forwarding 52861097W | Active |
| 868 | Yock Engineering 52872348X | Active |
| 869 | Young Generation Beauty Parlour 52706900X | Active |
| 870 | Yan Min Trading 52874899L | Active |