| KOH & KOH LIMITED | Private company limited by shares | Dissolved |
| PSK LIMITED | Private company limited by shares | Live |
| 香港固元精中醫研究院有限公司 | Private company limited by shares | Live |
| CDX PCB LIMITED | Private company limited by shares | Live |
| CRG LIMITED | Private company limited by shares | Dissolved |
| Kok Kiu Company Limited | Private company limited by shares | Live |
| Ba Mei Hom Limited | Private company limited by shares | Live |
| L2A Limited | Private company limited by shares | Live |
| HIB LIMITED | Private company limited by shares | Live |
| Yu Fen Limited | Private company limited by shares | Live |