| UNIVERSAL SCIENTIFIC INSTRUMENT LIMITED | Private company limited by shares | Dissolved |
| KEPU INSTRUMENT VALVE CO., LIMITED | Private company limited by shares | Live |
| VEECO INSTRUMENT HK CO., LIMITED | Private company limited by shares | Live |
| New Vision Instrument Company Limited | Private company limited by shares | Live |
| VIVALS MUSICAL INSTRUMENT COMPANY LIMITED | Private company limited by shares | Live |
| Vteke Instrument Co., Limited | Private company limited by shares | Live |
| FANDA WEIGHING INSTRUMENT CO., LIMITED | Private company limited by shares | Live |
| WELFARE INSTRUMENT COMPANY LIMITED | Private company limited by shares | Live |
| WILSON MARINE INSTRUMENT CO., LIMITED | | Live |
| WILSON OPTICAL & INSTRUMENT CO. LIMITED | Private company limited by shares | Dissolved |
| Wisdom Instrument Limited | Private company limited by shares | Dissolved |
| GRAND WOOD ARTIST INSTRUMENT MANUFACTURING LIMITED | Private company limited by shares | Dissolved |
| XIANRUI INSTRUMENT LIMITED | Private company limited by shares | Dissolved |
| Xinfeida Instrument (H.K.) Limited | Private company limited by shares | Live |
| Xinkaifeng Precision Instrument Co., Limited | Private company limited by shares | Live |
| XINLONG LEVEL INSTRUMENT CO., LIMITED | Private company limited by shares | Live |
| NINGBO YAKI OPTICAL INSTRUMENT CO., LIMITED | Private company limited by shares | Live |
| YAMADA INSTRUMENT LIMITED | Private company limited by shares | Dissolved |
| YU YANG SCIENTIFIC INSTRUMENT CO., LIMITED | Private company limited by shares | Live |
| YANION HI-TECH INSTRUMENT (HK) CO. LIMITED | Private company limited by shares | Dissolved |
| Yifeng Instrument Accessories Hong Kong Limited | Private company limited by shares | Live |
| HK YIHE INSTRUMENT CO., LIMITED | Private company limited by shares | Live |
| YIMI CARE INSTRUMENT LIMITED | Private company limited by shares | Live |
| YINENG HI-TECH INSTRUMENT COMPANY LIMITED | Private company limited by shares | Live |
| Ying Ke Instrument (Hongkong) Technology Co., Limited | Private company limited by shares | Live |
| YI'OU MEDICAL INSTRUMENT (HK) LIMITED | Private company limited by shares | Live |
| YIWU TIANYING OPTICAL INSTRUMENT CO., LIMITED | Private company limited by shares | Live |
| HK YONGRUN INSTRUMENT TECHNOLOGY CO., LIMITED | Private company limited by shares | Live |
| YORK INSTRUMENT LIMITED | Private company limited by shares | Live |
| YUEQING NEW ORIENTAL INSTRUMENT CO., LIMITED | Private company limited by shares | Live |
| ZHAO XIN INSTRUMENT (HK) LIMITED | Private company limited by shares | Live |
| ZHENG HANG INSTRUMENT (HONGKONG) LIMITED | Private company limited by shares | Live |
| ZHICHENG INSTRUMENT LIMITED | Private company limited by shares | Live |
| ZISICO LED INSTRUMENT LIMITED | Private company limited by shares | Live |
| CHINESE YOUTH NATIONAL INSTRUMENTAL MUSIC ASSOCIATION LIMITED | Private company limited by shares | Live |
| HONG KONG FASTONE INSTRUMENTAL EQUIPMENT COMPANY LIMITED | Private company limited by shares | Dissolved |
| EUROCRAFT AUDIO & MUSIC INSTRUMENTAL GERMANY CO LIMITED | Private company limited by shares | Live |
| 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 |