| Sunnytech Company Limited | | Live |
| HK SUNNY-TECH CO., LIMITED | Private company limited by shares | Dissolved |
| Sunnytech Asia Co., Limited | Private company limited by shares | Live |
| SUNNY-TECH ENTERPRISES CO., LIMITED | Private company limited by shares | Live |
| SUNNYTECH DEVELOPMENT LIMITED | Private company limited by shares | Dissolved |
| SUNNY-TECH ELECTRONIC COMPANY LIMITED | Private company limited by shares | Dissolved |
| Sunnytech Electronics Company Limited | Private company limited by shares | Live |
| SUNNY-TECH ENVIRONMENT COMPANY LIMITED | Private company limited by shares | Dissolved |
| SUNNYTECH (HONG KONG) LIMITED | Private company limited by shares | Dissolved |
| SUNNYTECH HONG KONG LIMITED | Private company limited by shares | Dissolved |
| SUNNYTECH (HONG KONG) TECHNOLOGY LIMITED | Private company limited by shares | Dissolved |
| HONGKONG SUNNYTECH INDUSTRY CO., LIMITED | Private company limited by shares | Dissolved |
| Sunnytech Industry Limited | Private company limited by shares | Live |
| SUNNYTECH PEAKTON LIMITED | Private company limited by shares | Dissolved |
| SUNNYTECH ENGINEERING SERVICES LIMITED | Private company limited by shares | Live |