| Funk Instrumental International Limited | Private company limited by shares | Live |
| FEILY INSTRUMENTAL LOK-UP LIMITED | Private company limited by shares | Dissolved |
| MATTHEW INSTRUMENTAL MUSIC LIMITED | Private company limited by shares | Live |
| Nuvo Instrumental (Asia) Limited | Private company limited by shares | Live |
| INSTRUMENTAL SCIENCE AND TECHNOLOGY CORPORATION LIMITED | | Live |
| Mosen Instrumental Technology Limited | Private company limited by shares | Live |
| CHI INSTRUMENTATION LIMITED | Private company limited by shares | Live |
| HK HUINENG AUTOMATION INSTRUMENTATION LIMITED | Private company limited by shares | Dissolved |
| CAMBRIDGE RESEARCH & INSTRUMENTATION (CHINA) LIMITED | Private company limited by shares | Live |
| WASSON-ECE INSTRUMENTATION (CHINA) INC LIMITED | Private company limited by shares | Live |
| WUXI BOER POWER INSTRUMENTATION (HK) CO., LIMITED | Private company limited by shares | Live |
| HK ELECTRICAL INSTRUMENTATION TRADE CO., LIMITED | Private company limited by shares | Dissolved |
| Fresnel Instrumentation (Hong Kong) Limited | Private company limited by shares | Live |
| General Instrumentation Limited | Private company limited by shares | Live |
| GEOTECH INSTRUMENTATION LIMITED | Private company limited by shares | Dissolved |
| HUIZHONG INSTRUMENTATION (HONG KONG) CO., LIMITED | Private company limited by shares | Live |
| WASSON-ECE INSTRUMENTATION (HONGKONG) CO., LIMITED | Private company limited by shares | Live |
| INNOTECH INSTRUMENTATION CO., LIMITED | Private company limited by shares | Live |
| LIAD INSTRUMENTATION HONGKONG LIMITED | Private company limited by shares | Live |
| Pan-Communication Scientific Instrumentation Co., Limited | Private company limited by shares | Live |
| RENMIN ELECTRICAL INSTRUMENTATION (HK) LIMITED | Private company limited by shares | Live |
| Dek Research Instrumentation Limited | | Live |
| SHANGHAI AUTOMATION INSTRUMENTATION CO., LIMITED | Private company limited by shares | Live |
| HUALI INSTRUMENTATION (SHANGHAI) CO., LIMITED | Private company limited by shares | Dissolved |
| SHANGHAI HUAXIN INSTRUMENTATION LIMITED | Private company limited by shares | Live |
| SHANGHAI PEOPLE INSTRUMENTATION SHARE LIMITED | Private company limited by shares | Live |
| SHANGHAI PEOPLE TECHNOLOGY INSTRUMENTATION LIMITED | Private company limited by shares | Dissolved |
| INSTRUMENTATION TECHNOLOGIES LIMITED | Private company limited by shares | Dissolved |
| HKK Instrumentation Technologies Co Limited | Private company limited by shares | Live |
| MLT INSTRUMENTATION TECHNOLOGIES CO., LIMITED | Private company limited by shares | Live |
| INSTRUMENTATION & TESTING LIMITED | Private company limited by shares | Live |
| CHINESE INDUSTRIAL INSTRUMENTATION EQUIPMENT TECHNOLOGY TRAINING CENTRE CO., LIMITED | Private company limited by shares | Live |
| Ocean Instrument(HK)Co., Limited | Private company limited by shares | Live |
| I. C. INSTRUMENTS LIMITED | Private company limited by shares | Dissolved |
| U. S. INSTRUMENTS LIMITED | Private company limited by shares | Live |
| VMT INSTRUMENTS LIMITED | Private company limited by shares | Dissolved |
| MTL INSTRUMENTS LIMITED | Private company limited by shares | Dissolved |
| MGP INSTRUMENTS LIMITED | Private company limited by shares | Dissolved |
| TC INSTRUMENTS LIMITED | Private company limited by shares | Dissolved |
| T & M INSTRUMENTS LIMITED | Private company limited by shares | Dissolved |
| K&M INSTRUMENTS LIMITED | Private company limited by shares | Live |
| HT INSTRUMENTS LIMITED | Private company limited by shares | Live |
| CEM Instruments Limited | Private company limited by shares | Live |
| ADA INSTRUMENTS LIMITED | Private company limited by shares | Dissolved |
| OTS INSTRUMENTS LIMITED | Private company limited by shares | Live |
| KHK Instruments Company Limited | Private company limited by shares | Live |
| APL INSTRUMENTS LIMITED | Private company limited by shares | Live |
| YFM INSTRUMENTS LIMITED | Private company limited by shares | Live |
| TC INSTRUMENTS COMPANY LIMITED | Private company limited by shares | Live |
| ZD INSTRUMENTS LIMITED | Private company limited by shares | Live |
| ADA INSTRUMENTS LIMITED | Private company limited by shares | Live |
| Ivy Instruments Limited | Private company limited by shares | Live |
| One Med Instruments Company Limited | | Live |
| ABEST TECHNOLOGY INSTRUMENTS CO., LIMITED | Private company limited by shares | Live |
| ABLE MAX INSTRUMENTS COMPANY LIMITED | Private company limited by shares | Live |
| ADVENT INSTRUMENTS (ASIA) LIMITED | Private company limited by shares | Live |
| ADYJ SCIENTIFIC INSTRUMENTS (HK) COMPANY LIMITED | Private company limited by shares | Live |
| AERO-TECHNICS, SYSTEMS AND INSTRUMENTS LIMITED | Private company limited by shares | Dissolved |
| AiLF Instruments International Co., Limited | | Live |
| L&B Alexander Instruments Limited | Private company limited by shares | Live |
| HK AMAZING TONE MUSICAL INSTRUMENTS CO., LIMITED | Private company limited by shares | Dissolved |
| AMERICAN SHUANGXI MUSICAL INSTRUMENTS LIMITED | Private company limited by shares | Live |
| Amity Instruments HongKong Company Limited | Private company limited by shares | Live |
| ANAM INSTRUMENTS (HK) COMPANY LIMITED | Private company limited by shares | Dissolved |
| VG INSTRUMENTS ASIA LIMITED | Private company limited by shares | Dissolved |
| CS Instruments (Asia) Co. Limited | Private company limited by shares | Live |
| Nu Instruments Asia Limited | Private company limited by shares | Live |
| BMH INSTRUMENTS (ASIA) COMPANY LIMITED | Private company limited by shares | Live |
| GRANT INSTRUMENTS (ASIA) LIMITED | Private company limited by shares | Live |
| ASIAN INSTRUMENTS COMPANY LIMITED | Private company limited by shares | Dissolved |
| AUSTMED-TECH INSTRUMENTS COMPANY LIMITED | Private company limited by shares | Live |
| FTD Automation Instruments Limited | Private company limited by shares | Live |
| AVIONIC INSTRUMENTS LIMITED | Private company limited by shares | Live |
| Avontron Instruments Limited | Private company limited by shares | Live |
| Jun Bang precision instruments Co., Limited | Private company limited by shares | Live |
| BENYANG PRECISION INSTRUMENTS (HONGKONG) CO., LIMITED | | Live |
| Bettersize Instruments (HK) Limited | Private company limited by shares | Live |
| BINNS INSTRUMENTS CO., LIMITED | Private company limited by shares | Dissolved |
| Biolight Instruments Company Limited | Private company limited by shares | Live |
| AIPU Biology Instruments Limited | Private company limited by shares | Live |
| BIO-MEN INSTRUMENTS (H.K.) LIMITED | Private company limited by shares | Dissolved |
| Biotek Instruments Limited | Private company limited by shares | Live |
| Bona Instruments (Hong Kong) Co., Limited | Private company limited by shares | Live |
| BONA FIDE INSTRUMENTS COMPANY LIMITED | Private company limited by shares | Dissolved |
| BORIY MEDICAL INSTRUMENTS CO., LIMITED | Private company limited by shares | Live |
| BOSCO MUSICAL INSTRUMENTS COMPANY LIMITED | Private company limited by shares | Live |
| BRIGHT INSTRUMENTS COMPANY LIMITED | Private company limited by shares | Dissolved |
| BRIGHT AUSTMED INSTRUMENTS LIMITED | Private company limited by shares | Dissolved |
| BURKERT INSTRUMENTS LIMITED | Private company limited by shares | Live |
| CALIFORNIA INSTRUMENTS COMPANY LIMITED | Private company limited by shares | Dissolved |
| A C CAPITAL INSTRUMENTS LIMITED | Private company limited by shares | Dissolved |
| CASW INSTRUMENTS LIMITED | Private company limited by shares | Live |
| CELLULAR INSTRUMENTS LIMITED | Private company limited by shares | Dissolved |
| CESEC INSTRUMENTS LIMITED | Private company limited by shares | Dissolved |
| CHEER SAILS MEDICAL INSTRUMENTS LIMITED | Private company limited by shares | Dissolved |
| SOUTH EAST CHEMICALS AND INSTRUMENTS LIMITED | Private company limited by shares | Live |
| Lab Chemicals and Instruments (Hongkong) Limited | | Live |
| CHINA INSTRUMENTS COMPANY LIMITED | Private company limited by shares | Live |
| GV INSTRUMENTS (CHINA) LIMITED | Private company limited by shares | Live |
| BST Instruments China Limited | Private company limited by shares | Live |