| MEDILAB INSTRUMENTS LIMITED | Private company limited by shares | Dissolved |
| Megphy Instruments Co., Limited | Private company limited by shares | Live |
| Meideal Musical Instruments Co., Limited | Private company limited by shares | Live |
| MEIGI MUSICAL INSTRUMENTS TRADING CO., LIMITED | Private company limited by shares | Live |
| MEISHENG MUSICAL INSTRUMENTS (H.K) CO., LIMITED | Private company limited by shares | Live |
| Melody Musical Instruments Corporation Limited | Private company limited by shares | Live |
| MERIDIAN INSTRUMENTS (H.K.) LIMITED | Private company limited by shares | Dissolved |
| MITEK SCIENTIFIC INSTRUMENTS LIMITED | Private company limited by shares | Live |
| MULTI INSTRUMENTS HONG KONG LIMITED | Private company limited by shares | Live |
| SKY MUSICAL INSTRUMENTS LIMITED | Private company limited by shares | Dissolved |
| JAE MUSICAL INSTRUMENTS LIMITED | Private company limited by shares | Dissolved |
| FINO MUSICAL INSTRUMENTS COMPANY LIMITED | Private company limited by shares | Live |
| GALAXY MUSICAL INSTRUMENTS LIMITED | Private company limited by shares | Live |
| GRAND MUSICAL INSTRUMENTS LIMITED | Private company limited by shares | Live |
| AXL MUSICAL INSTRUMENTS (HK) LIMITED | Private company limited by shares | Live |
| Katra Musical Instruments Limited | Private company limited by shares | Live |
| MERIDA MUSICAL INSTRUMENTS LIMITED | Private company limited by shares | Live |
| NGAI FAI MUSICAL INSTRUMENTS CO. LIMITED | Private company limited by shares | Live |
| WALTER MUSICAL INSTRUMENTS LIMITED | Private company limited by shares | Live |
| NAPCO PRECISION INSTRUMENTS CO., LIMITED | Private company limited by shares | Live |
| China National Instruments Import & Export (HK) Limited | Private company limited by shares | Live |
| NATIONAL INSTRUMENTS HONG KONG LIMITED | Private company limited by shares | Live |
| Natural Instruments Hongkong Limited | Private company limited by shares | Live |
| NEWTON INSTRUMENTS LIMITED | Private company limited by shares | Dissolved |
| NUPOWER INSTRUMENTS LIMITED | Private company limited by shares | Live |
| NUTEK INSTRUMENTS COMPANY LIMITED | Private company limited by shares | Dissolved |
| Omnia Instruments Limited | Private company limited by shares | Live |
| ONWAY AIRLINE INSTRUMENTS LIMITED | Private company limited by shares | Dissolved |
| HALO OPTICAL ELECTRONIC INSTRUMENTS LIMITED | Private company limited by shares | Dissolved |
| Hawk Optical Instruments International Corporation Limited | Private company limited by shares | Live |
| Swift Optical Instruments Limited | Private company limited by shares | Dissolved |
| WINNER OPTICAL INSTRUMENTS GROUP COMPANY LIMITED | Private company limited by shares | Live |
| OPTICS FOCUS INSTRUMENTS CO., LIMITED | Private company limited by shares | Dissolved |
| ORCHID INSTRUMENTS LIMITED | Private company limited by shares | Dissolved |
| ORIENT SUPPLY INSTRUMENTS LIMITED | Private company limited by shares | Live |
| Sunny Instruments Overseas Limited | Private company limited by shares | Live |
| HENGAN INSTRUMENTS (ASIA PACIFIC) LIMITED | Private company limited by shares | Live |
| Smart Instruments (Asia Pacific) Limited | Private company limited by shares | Live |
| ORBOT INSTRUMENTS PACIFIC LIMITED | Private company limited by shares | Dissolved |
| Pango musical instruments co., Limited | | Live |
| PERRY SCIENTIFIC INSTRUMENTS (HONGKONG) LIMITED | Private company limited by shares | Live |
| PERTEN INSTRUMENTS (ASIA) LIMITED | Private company limited by shares | Dissolved |
| HK PHOENIX INSTRUMENTS LIMITED | | Live |
| PHOTONLABS INSTRUMENTS LIMITED | Private company limited by shares | Live |
| POVAC INSTRUMENTS LIMITED | Private company limited by shares | Live |
| HK POWER INSTRUMENTS LIMITED | Private company limited by shares | Live |
| PRECISION INSTRUMENTS COMPANY LIMITED | Private company limited by shares | Dissolved |
| PRECISION INSTRUMENTS COMPANY LIMITED | Private company limited by shares | Dissolved |
| HQ PRECISION INSTRUMENTS LIMITED | Private company limited by shares | Dissolved |
| ALL THE EED PRECISION INSTRUMENTS LIMITED | Private company limited by shares | Live |
| AOPOK PRECISION INSTRUMENTS LIMITED | Private company limited by shares | Live |
| Innovative Precision Instruments Limited | Private company limited by shares | Live |
| SOKA PRECISION INSTRUMENTS LIMITED | Private company limited by shares | Dissolved |
| TAISA PRECISION INSTRUMENTS LIMITED | Private company limited by shares | Live Commenced dormancy on 03-Feb-2016 |
| PreeKem Scientific Instruments Co., Limited | Private company limited by shares | Live |
| PRODUCTION INSTRUMENTS LIMITED | Private company limited by shares | Dissolved |
| P.T. INSTRUMENTS LIMITED | Private company limited by shares | Dissolved |
| Qiushi Scientific Instruments Limited | Private company limited by shares | Live |
| Q.One Instruments Limited | Private company limited by shares | Live |
| QUALITY INSTRUMENTS COMPANY LIMITED | Private company limited by shares | Dissolved |
| QUANSHENG INSTRUMENTS (H.K.) LIMITED | Private company limited by shares | Dissolved |
| RADIANCE INSTRUMENTS LIMITED | Private company limited by shares | Live |
| Relab Instruments (HongKong) Limited | Private company limited by shares | Live |
| RISE INSTRUMENTS HONGKONG CO., LIMITED | Private company limited by shares | Live |
| ROCKWELL INSTRUMENTS LIMITED | Private company limited by shares | Dissolved |
| ROWE INSTRUMENTS LIMITED | Private company limited by shares | Live |
| HK SAIBAO INSTRUMENTS LIMITED | Private company limited by shares | Dissolved |
| SAPPHIRE INSTRUMENTS H.K. CO. LIMITED | Private company limited by shares | Live |
| Scensor Instruments Limited | Private company limited by shares | Live |
| SCIENTIFIC INSTRUMENTS LIMITED | Private company limited by shares | Live |
| HK PSI Scientific Instruments Limited | | Live |
| Forwards Scientific Instruments Limited | Private company limited by shares | Live |
| LICOR SCIENTIFIC INSTRUMENTS LIMITED | Private company limited by shares | Live |
| Innoteg (Asia Pacific) Scientific Instruments Company Limited | Private company limited by shares | Live |
| Phenom Scientific Instruments Limited | Private company limited by shares | Live |
| Yongka Scientific Instruments Limited | | Live |
| Scott String Instruments (HK) Limited | Private company limited by shares | Live |
| SDAR INSTRUMENTS (HK) LIMITED | Private company limited by shares | Live |
| SEIKO INSTRUMENTS (H.K.) LIMITED | Private company limited by shares | Live |
| SEMITEK INSTRUMENTS LIMITED | Private company limited by shares | Live |
| SEMTECH INSTRUMENTS COMPANY LIMITED | Private company limited by shares | Dissolved |
| Shandong Lionscope Medical Instruments Limited | Private company limited by shares | Dissolved |
| SHANGHAI TOP VIEW INSTRUMENTS CO., LIMITED | Private company limited by shares | Live |
| Shanghai Link Instruments Co., Limited | | Live |
| SHANGHAI SCIENTIFIC INSTRUMENTS AND MATERIALS COMPANY LIMITED | Private company limited by shares | Dissolved |
| SHANGHAI XINGLI INSTRUMENTS LIMITED | Private company limited by shares | Live |
| SHENQU MUSICAL INSTRUMENTS (HONGKONG) LIMITED | Private company limited by shares | Live |
| SHUNTER TELEPHONE INSTRUMENTS LIMITED | Private company limited by shares | Dissolved |
| SICTEC INSTRUMENTS COMPANY LIMITED | Private company limited by shares | Live |
| Silver Automation Instruments Limited | Private company limited by shares | Live |
| Sino-American Instruments (HongKong) Trading Co., Limited | Private company limited by shares | Live |
| SINOTECH INSTRUMENTS LIMITED | Private company limited by shares | Dissolved |
| Sinova Scientific Instruments Company Limited | Private company limited by shares | Dissolved |
| SMART INSTRUMENTS LIMITED | Private company limited by shares | Live |
| Snow Instruments International Limited | | Live |
| SOPHIA INSTRUMENTS LIMITED | Private company limited by shares | Live |
| South Instruments Limited | | Live |
| STAGEMASTER INSTRUMENTS CO. LIMITED | Private company limited by shares | Live |
| STANDARD INSTRUMENTS COMPANY LIMITED | Private company limited by shares | Live |
| STARMETER INSTRUMENTS CO., LIMITED | Private company limited by shares | Live |