| Promet Metals Testing Laboratory Limited | Private company limited by shares | Live |
| SPECTRUM RESEARCH AND TESTING LABORATORY LIMITED | Private company limited by shares | Live |
| SUNNIC RESEARCH & TESTING LABORATORY LIMITED | Private company limited by shares | Dissolved |
| WASSERBEL TESTING LABORATORY LIMITED | Private company limited by shares | Live |
| THEMIS LABORATORY CO., LIMITED | Private company limited by shares | Dissolved |
| THING-ING LABORATORY LIMITED | Company limited by guarantee | Live |
| THIZLINUX LABORATORY LIMITED | Private company limited by shares | Live |
| Toda Research Laboratory (HK) Limited | Private company limited by shares | Live |
| TOEI GENERAL LABORATORY (H.K.) CO., LIMITED | Private company limited by shares | Dissolved |
| TOPDENT INTERNATIONAL DENTAL LABORATORY LIMITED | Private company limited by shares | Live |
| BUSINESS TRAINING LEARNING LABORATORY LIMITED | Private company limited by shares | Dissolved |
| TWIN WAY RESEARCH & LABORATORY LIMITED | Private company limited by shares | Dissolved |
| UCOSME Asia Skin Scientific Laboratory Limited | Private company limited by shares | Dissolved |
| Unbelievable Testing Laboratory Limited | Private company limited by shares | Live |
| UNITED COMPUTING LABORATORY LIMITED | Private company limited by shares | Dissolved |
| UNITED STANDARD TESTING LABORATORY LIMITED | Private company limited by shares | Live |
| UNIVERSAL LABORATORY LIMITED | Private company limited by shares | Dissolved |
| Universal Laboratory Limited | Private company limited by shares | Live |
| UNIVERSAL DENTAL LABORATORY LIMITED | Private company limited by shares | Live |
| URBAN FITNESS MEDICAL LABORATORY SERVICES LIMITED | Private company limited by shares | Live |
| VANGUARD COMPUTER ASSISTED LABORATORY LIMITED | Private company limited by shares | Live |
| CityU Veterinary Diagnostic Laboratory Company Limited | Private company limited by shares | Live |
| PHC Veterinary Laboratory Management Limited | Private company limited by shares | Dissolved |
| LAVA LABORATORY FOR VISIONARY ARCHITECTURE LIMITED | Private company limited by shares | Live |
| VITA GREEN LABORATORY (AP LEI CHAU) LIMITED | Private company limited by shares | Live |
| VITA24 DENTAL LABORATORY LIMITED | Private company limited by shares | Live |
| VOLENT LABORATORY LIMITED | Private company limited by shares | Live |
| WARTTYER LABORATORY LIMITED | Private company limited by shares | Dissolved |
| GUANGZHOU WILSON LABORATORY EQUIPMENT CO., LIMITED | Private company limited by shares | Live |
| Yosakura Laboratory Limited | Private company limited by shares | Live |
| Zeta Laboratory Limited | Private company limited by shares | Dissolved |