| H.Y.T. LIMITED | Private company limited by shares | Live |
| HYT10 Limited | | Live |
| HYTA INTERNATIONAL LIMITED | Private company limited by shares | Dissolved |
| HYTANICO LIMITED | Private company limited by shares | Live |
| HYTE LIMITED | Private company limited by shares | Dissolved |
| HYTEC ELECTROPLATING LIMITED | Private company limited by shares | Dissolved |
| HY-TECH LIMITED | Private company limited by shares | Dissolved |
| HYTECHNOLOGY LIMITED | Private company limited by shares | Dissolved |
| HK HYTED TECHNOLOGY CO., LIMITED | Private company limited by shares | Live |
| HYTEK LIMITED | | Live |
| HYTELIK TECHNOLOGY COMPANY LIMITED | Private company limited by shares | Live |
| HYTERA LIMITED | Private company limited by shares | Live |
| Hytera communications Limited | Private company limited by shares | Live |
| Hytera Wenyuan (Hong Kong) Corporation Limited | | Live |
| Hytera High-Tech (Hong Kong) Company Limited | | Live |
| Hytera Communications (Hong Kong) Company Limited | Private company limited by shares | Live |
| Hytera Information (Hong Kong) Company Limited | | Live |
| Hytera International (Hong Kong) Company Limited | | Live |
| Hytera International Technology (Hong Kong) Company Limited | | Live |
| Hytera Technology (Hong Kong) Company Limited | Private company limited by shares | Live |
| HYTERA COMMUNICATION & SYSTEM LIMITED | Private company limited by shares | Live |
| Hytesoft (Hong Kong) Co., Limited | Private company limited by shares | Live |
| PERFECTION HY-TEST ASIA LIMITED | Private company limited by shares | Dissolved |
| HYTHE LIMITED | Private company limited by shares | Dissolved |
| HY-THUNDER TECHNOLOGY CO., LIMITED | Private company limited by shares | Live |
| HYTIME HOLDING (CHINA) LIMITED | Private company limited by shares | Live |
| HYTIME INDUSTRIAL CO., LIMITED | Private company limited by shares | Live |
| HYTIME INDUSTRIAL CO., LIMITED | Private company limited by shares | Live |
| HYTK HONG KONG LIMITED | Private company limited by shares | Dissolved |
| HYT-Mart LIMITED | Private company limited by shares | Live |
| HYTONG TRADING LIMITED | Private company limited by shares | Dissolved |
| HYTOP COMPANY LIMITED | Private company limited by shares | Live |
| HY-TOPSAVING SOLUTIONS LIMITED | Private company limited by shares | Dissolved |
| HYTORC ENTERPRISES LIMITED | Private company limited by shares | Live |
| HYTORC GROUP INVESTMENT CO., LIMITED | Private company limited by shares | Live |
| HYTOY LIMITED | Private company limited by shares | Dissolved |
| Hytrix Limited | | Live |
| HYTRON LIMITED | Private company limited by shares | Dissolved |
| HYTRONIK SOLUTIONS (HOLDINGS) LIMITED | Private company limited by shares | Live |
| HYTRONIK INDUSTRIAL (HONG KONG) LIMITED | | Live |
| HYTRONIK INDUSTRIAL LIMITED | Private company limited by shares | Live |
| HYTRUN LIMITED | Private company limited by shares | Live |
| HYTRUN ENTERPRISE LIMITED | Private company limited by shares | Live |
| HYTS GROUP LIMITED | Private company limited by shares | Dissolved |
| HYTSU GROUP HOLDING COMPANY LIMITED | Private company limited by shares | Live |
| HYTTO LIMITED | Private company limited by shares | Live |
| Hytx.com China Holding Limited | Private company limited by shares | Live |
| HK HYTY INT'L SLIMMING CHAIN GROUP LIMITED | Private company limited by shares | Live |