| Utron Tech Limited | Private company limited by shares | Live |
| U-TRON TECHNOLOGIES LIMITED | Private company limited by shares | Dissolved |
| Utron Technologies Company Limited | Private company limited by shares | Live |
| UTRON TECHNOLOGY COMPANY LIMITED | Private company limited by shares | Dissolved |
| UTRON ELECTRONIC TECHNOLOGY CO., LIMITED | Private company limited by shares | Live |
| Utron Trading Limited | | Live |
| Utron International Trading (HK) Limited | Private company limited by shares | Live |
| Utronix Electronics Company Limited | Private company limited by shares | Live |
| UTRVST BUSINESS CONSULTING LIMITED | Private company limited by shares | Live |
| U.T.S. ASIA LIMITED | Private company limited by shares | Live |
| UTSGLOBAL HK LIMITED | | Live |
| UTSHAB HK TRADE COMPANY LIMITED | Private company limited by shares | Live |
| UTSOURCE HOLDING COMPANY LIMITED | Private company limited by shares | Live |
| UTSTANDING INTERNATIONAL TECH LIMITED | Private company limited by shares | Live |
| UTSTARCOM (CHINA) LIMITED | Private company limited by shares | Dissolved |
| TELPO LINTECH UTSTARCOM LIMITED | Private company limited by shares | Dissolved |
| UTSTEEL LIMITED | Private company limited by shares | Live |
| A & H UTTAM LIMITED | Private company limited by shares | Dissolved |
| Uttamchandani-Javier Limited | Private company limited by shares | Dissolved |
| UTTAM'S EMPORIUM LIMITED | Private company limited by shares | Dissolved |
| UTTAR LIMITED | Private company limited by shares | Dissolved |
| HK Utter Electronics Limited | | Live |
| UTTER PEONY LIMITED | Private company limited by shares | Live |
| UTTER MAX TECHNOLOGY COMPANY LIMITED | Private company limited by shares | Live |
| UTTERBAY LIMITED | Private company limited by shares | Dissolved |
| UTTERBEST COMPANY LIMITED | Private company limited by shares | Dissolved |
| UTTERMKOST COMPANY LIMITED -THE- | Private company limited by shares | Live |
| Uttermost Sky Tech Limited | | Live |
| UTTERSON ESTATES LIMITED | Private company limited by shares | Dissolved |
| UTTOXETER LIMITED | Private company limited by shares | Dissolved |
| UTTsolar Limited | Private company limited by shares | Live |
| UTTswitzerland Limited | Private company limited by shares | Dissolved |
| UTT-TECH Plastic (Hong Kong) Co., LIMITED | Private company limited by shares | Live |
| UTT-TechMold Limited | Private company limited by shares | Live |
| UTUI LIMITED | Private company limited by shares | Live |
| UTUNOMIYA GYOUZAKAN INTERNATIONAL LIMITED | Private company limited by shares | Dissolved |
| UTUNUE COMPANY LIMITED | Private company limited by shares | Dissolved |
| U-TURN INTERNATIONAL CORP. LIMITED | Private company limited by shares | Dissolved |
| U-TURN GENE AND HEALTH BIOTECHNOLOGY CO., LIMITED | Private company limited by shares | Live |
| U-TURN Media Group (Asia) Limited | Private company limited by shares | Dissolved |
| U-TURN (HONG KONG) COMPANY LIMITED | Private company limited by shares | Live |
| Ututu Limited | | Live |
| UTVay Extracts Co., Limited | | Live |
| UTWIN LIMITED | Private company limited by shares | Dissolved |
| UTXO LIMITED | Private company limited by shares | Live |
| U-type tech Co., Limited | | Live |