| 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 |
| HK STARMETER INSTRUMENTS CO., LIMITED | Private company limited by shares | Live |
| SUNCARE MEDICAL INSTRUMENTS CO., LIMITED | Private company limited by shares | Live |
| SUNCROSS MEDICAL INSTRUMENTS CO., LIMITED | Private company limited by shares | Live |
| Shenzhen Sunlance Scientific Instruments Co., Limited | Private company limited by shares | Live |
| Sunpower Instruments Limited | Private company limited by shares | Dissolved |
| SUPER INSTRUMENTS CO., LIMITED | Private company limited by shares | Live |
| SUPREME INSTRUMENTS LIMITED | Private company limited by shares | Live |
| SINO-ASIA SURVEYING INSTRUMENTS CO. LIMITED | Private company limited by shares | Dissolved |
| SURVEYMAN INSTRUMENTS & SYSTEMS LIMITED | Private company limited by shares | Live |
| Taichu Instruments Limited | Private company limited by shares | Live |
| TECHMED INSTRUMENTS COMPANY LIMITED | Private company limited by shares | Dissolved |
| YUHONG TECHMED INSTRUMENTS COMPANY LIMITED | Private company limited by shares | Dissolved |
| TECHNIC INSTRUMENTS LIMITED | Private company limited by shares | Live |
| TECHNICON INSTRUMENTS CO. (H.K.) LIMITED | Private company limited by shares | Dissolved |
| ADVANCED INSTRUMENTS AND TECHNOLOGIES CO., LIMITED | Private company limited by shares | Live |
| HY INSTRUMENTS & TECHNOLOGY LIMITED | Private company limited by shares | Live |
| KETAI TECHNOLOGY INSTRUMENTS CO., LIMITED | Private company limited by shares | Live |
| PRECISION INSTRUMENTS TECHNOLOGY LIMITED | Private company limited by shares | Live Commenced dormancy on 26-Oct-2015 |
| SCIENTIFIC INSTRUMENTS AND ADVANCED TECHNOLOGY INTERNATIONAL LIMITED | | Live |
| Seedms Instruments Technology Limited | Private company limited by shares | Dissolved |
| South Instruments Technology Limited | Private company limited by shares | Live |
| VECON INSTRUMENTS TECHNOLOGY CO., LIMITED | Private company limited by shares | Live |
| ZHONGZHI TESTING INSTRUMENTS (HK) CO., LIMITED | Private company limited by shares | Live |
| TestResources Instruments Limited | Private company limited by shares | Live |
| TEXAS INSTRUMENTS LIMITED | | Live |
| THERMO SCIENTIFIC INSTRUMENTS (CHINA) LIMITED | Private company limited by shares | Dissolved |
| TIANLONG INSTRUMENTS LIMITED | Private company limited by shares | Live Commenced dormancy on 02-Feb-2015 |
| Tops Instruments Supplies Company Limited | | Live |
| TOURNIQUEEN MEDICAL INSTRUMENT'S CO., LIMITED | Private company limited by shares | Dissolved |
| Chairman Instruments Trading Limited | Private company limited by shares | Live |
| Texas Instruments China Trading Limited | Private company limited by shares | Live |
| MIDAS MUSICAL INSTRUMENTS TRADING CO., LIMITED | Private company limited by shares | Live |
| Eastern Scientific Instruments Trading Limited | Private company limited by shares | Live |
| Seiko Instruments Trading (H.K.) Limited | Private company limited by shares | Live |
| TRILLION INSTRUMENTS SERVICE LIMITED | | Live |
| TRUWEL SCIENTIFIC INSTRUMENTS LIMITED | Private company limited by shares | Dissolved |
| TRUWEL SCIENTIFIC INSTRUMENTS LIMITED | Private company limited by shares | Live |
| Shanghai Tuyou Scientific Instruments Co., Limited | Private company limited by shares | Live |
| UNISEARCH INSTRUMENTS (CHINA) LIMITED | Private company limited by shares | Live |
| UNITED PRECISION INSTRUMENTS (1972) LIMITED | Private company limited by shares | Dissolved |
| UNITEK INSTRUMENTS LIMITED | Private company limited by shares | Dissolved |
| UNIVERSAL INSTRUMENTS LIMITED | Private company limited by shares | Live |
| UNIVERSAL SURVEYING INSTRUMENTS LIMITED | Private company limited by shares | Dissolved |
| UPCHINA (INSTRUMENTS) LIMITED | Private company limited by shares | Dissolved |
| USIDEAL INSTRUMENTS LIMITED | | Live |
| VEAZEN MUSICAL INSTRUMENTS LIMITED | | Live |
| VENTURA INSTRUMENTS LIMITED | Private company limited by shares | Dissolved |
| VIROBAN MEDICAL INSTRUMENTS LIMITED | Private company limited by shares | Live |
| HK VISTER INSTRUMENTS LIMITED | Private company limited by shares | Live |
| WATTS OPTICAL INSTRUMENTS LIMITED | Private company limited by shares | Live |
| WELLFORM OPTICAL INSTRUMENTS COMPANY LIMITED | Private company limited by shares | Dissolved |
| WELLS INSTRUMENTS (H.K.) LIMITED | Private company limited by shares | Live |
| WILSON INSTRUMENTS (HONGKONG) CO., LIMITED | Private company limited by shares | Live |
| WINGS INSTRUMENTS COMPANY LIMITED | Private company limited by shares | Live |
| HK WINKING MUSICAL INSTRUMENTS CO., LIMITED | Private company limited by shares | Live |
| Win-Win Instruments Limited | | Live |
| VAN GOGH (WRITING INSTRUMENTS) COMPANY LIMITED | Private company limited by shares | Live |
| WYLDAR PRECISION INSTRUMENTS LIMITED | Private company limited by shares | Live |
| SHANGHAI XUJI INSTRUMENTS CO., LIMITED | Private company limited by shares | Live |
| Yinghao Scientific Instruments & Materials Limited | | Live |
| YORK INSTRUMENTS INTERNATIONAL LIMITED | Private company limited by shares | Dissolved |
| York Instruments International Limited | Private company limited by shares | Live |
| Yuwo Instruments and Equipments Limited | Private company limited by shares | Live |
| ZAMAX INSTRUMENTS COMPANY LIMITED | Private company limited by shares | Dissolved |