| U.C. COMPANY LIMITED | Private company limited by shares | Live |
| UC888 Limited | Private company limited by shares | Live |
| Ucall Communications Hongkong International Investment Limited | Private company limited by shares | Live |
| UCAN ENTERTAINMENT LIMITED | Private company limited by shares | Live |
| Ucanbit Limited | Private company limited by shares | Live |
| UCANFOUND LIMITED | Private company limited by shares | Live |
| UCANGOLF LIMITED | Private company limited by shares | Dissolved |
| UCANPAY LIMITED | Private company limited by shares | Live |
| UCAP Finance Limited | Private company limited by shares | Live |
| UCAP LEADERSHIP LIMITED | Private company limited by shares | Live |
| Ucapri Hong Kong Limited | Private company limited by shares | Live |
| UCAR Limited | Private company limited by shares | Live |
| UCAR (HONG KONG) LIMITED | Private company limited by shares | Live |
| U-CAR IT MEDIA LIMITED | Private company limited by shares | Dissolved |
| UCAR Service Limited | Private company limited by shares | Live |
| UCAR Technology (China) Limited | Private company limited by shares | Live |
| Ucar Trading Co., Limited | Private company limited by shares | Live |
| UcarBuy HK Limited | Private company limited by shares | Live |
| U-CARE COMPANY LIMITED | Private company limited by shares | Live |
| Ucare HK Limited | Private company limited by shares | Live |
| Ucargo Asia Limited | Private company limited by shares | Live |
| UCARRY LIMITED | Private company limited by shares | Live |
| Ucars Limited | | Live |
| UcarShow HK Limited | Private company limited by shares | Live |
| UCASH LIMITED | | Live |
| UCast Limited | Private company limited by shares | Live |
| UCATAN LIMITED | Private company limited by shares | Dissolved |
| UCCA ENGINEERING LIMITED | Private company limited by shares | Live |
| UCCA PRECISION ENGINEERING LIMITED | Private company limited by shares | Live |
| UCCA FORMWORK (HK) LIMITED | Private company limited by shares | Live |
| UCCA FOUNDATION LIMITED | Private company limited by shares | Live |
| UCCA Foundation for Art and Education Limited | Company limited by guarantee | Live |
| UCCA Holdings Limited | Private company limited by shares | Dissolved |
| UCCA Holdings Limited | Private company limited by shares | Live |
| UCCA INTERNATIONAL COMPANY LIMITED | Private company limited by shares | Live |
| EDGE AND UCCELLO (PRINTING HOUSE) LIMITED | | Live |
| UCCELLO MEDICAL LIMITED | | Live |
| UCCHI TRADING HK LIMITED | Private company limited by shares | Live |
| UC-CHIPS ELECTRONICS LIMITED | Private company limited by shares | Live |
| UCCORP LIMITED | Private company limited by shares | Dissolved |
| UCCTV (Hong Kong) Limited | Private company limited by shares | Live |
| UCCU Entertainment Company Limited | Private company limited by shares | Live |
| UCELLX HK LIMITED | Private company limited by shares | Dissolved |
| UCEM Asia Limited | Private company limited by shares | Live |
| HK UCEN TECHNOLOGY LIMITED | Private company limited by shares | Live |
| UCENTER HOME LIMITED | Private company limited by shares | Live |
| U-CENTRE EXPORT COMPANY LIMITED -THE- | Private company limited by shares | Dissolved |
| U-Centred Technology Co., Limited | Private company limited by shares | Live |
| U-Centred Silicone & Plastic products Co., Limited | Private company limited by shares | Live |
| UCESI LIMITED | Private company limited by shares | Live |
| UCE-UNIVERSAL CENTER OF EDUCATION LIMITED | Private company limited by shares | Dissolved |
| UCFTI EXPO LIMITED | Private company limited by shares | Live |
| UCGAGA LIMITED | Private company limited by shares | Live |
| UCHA Consultants Limited | Private company limited by shares | Live |
| uChallenge Hong Kong Limited | Private company limited by shares | Dissolved |
| U-CHAMP TECHNOLOGY GROUP LIMITED | | Live |
| U-CHAMP TECHNOLOGY GROUP LIMITED | | Live |
| U-CHANCE LIMITED | Private company limited by shares | Live |
| Uchange Company Limited | Private company limited by shares | Live |
| UCHARGE LIMITED | Private company limited by shares | Live |
| UCHARM INVESTMENTS LIMITED | Private company limited by shares | Live |
| U-Charm Manpower Limited | | Live |
| U-charm Times Limited | Private company limited by shares | Live |
| Uchat Limited | Private company limited by shares | Live |
| UCHATWORLD LIMITED | Private company limited by shares | Live |
| Uchee Company Limited | Private company limited by shares | Live |
| UCHEE GROUP LIMITED | Private company limited by shares | Live |
| UCHEM CHINA INVESTMENT LIMITED | Private company limited by shares | Dissolved |
| Uchemelot Limited | | Live |
| U-CHEMO HOLDING CO., LIMITED | Private company limited by shares | Live |
| HongKong U-Chen Investment Group Limited | Private company limited by shares | Dissolved |
| Uchi International Co., Limited | Private company limited by shares | Live |
| Uchi Design Limited | Private company limited by shares | Live |
| UCHI INDUSTRIAL CO., LIMITED | Private company limited by shares | Dissolved |
| RICH UCHI LIMITED | Private company limited by shares | Dissolved |
| Hong Kong Uchic Co., Limited | Private company limited by shares | Live |
| UCHINERY TRADING COMPANY LIMITED | Private company limited by shares | Dissolved |
| UCHINO HONG KONG COMPANY LIMITED | | Live |
| U-CHIP LIMITED | Private company limited by shares | Dissolved |
| UChip Technology Limited | Private company limited by shares | Live |
| U-Chips Electronics Asia Limited | | Live |
| U-chips (HK) Co., Limited | Private company limited by shares | Live |
| Uchiwu Digital Technology Center Limited | | Live |
| UCHK TECHNOLOGY LIMITED | Private company limited by shares | Live |
| UCHNNG INDUSTRIAL AND TRADING (HK) COMPANY LIMITED | Private company limited by shares | Live |
| U-Choice Limited | Private company limited by shares | Dissolved |
| U-Choice Education Limited | Private company limited by shares | Dissolved |
| UCHOICE ENTERPRISE LIMITED | Private company limited by shares | Live |
| GUANGZHOU U-CHOICE TRADING LIMITED | Private company limited by shares | Live |
| U-CHOICE PRODUCTS LIMITED | Private company limited by shares | Dissolved |
| UCHOICE TECHNOLOGY COMPANY LIMITED | Private company limited by shares | Live |
| UCHOICE(HONG KONG) CO., LIMITED | Private company limited by shares | Live |
| Uchon Limited | | Live |
| Dongguan U-Choose Industrial Tech Co., Limited | Private company limited by shares | Live |
| Uchu Company Limited | | Live |
| UCHUANG Artificial Intelligence Limited | Private company limited by shares | Live |
| U-CHUNG REALTY LIMITED | Private company limited by shares | Dissolved |
| UCi2i APAC Limited | Private company limited by shares | Live |
| UCi2i Asia Limited | Private company limited by shares | Live |
| UCIA LIMITED | Private company limited by shares | Dissolved |