| JJW Electric And Instrument Engineering Limited | Private company limited by shares | Live |
| Green Sense Instrument Engineering Co., Limited | Private company limited by shares | Live |
| VBC INSTRUMENT ENGINEERING (HK) LIMITED | Private company limited by shares | Live |
| EVERTESTER INSTRUMENT CO., LIMITED | Private company limited by shares | Dissolved |
| EVERTESTER INSTRUMENT AND METER CO., LIMITED | Private company limited by shares | Dissolved |
| SHANGHAI FANGYI AUTOMATION & INSTRUMENT CO., LIMITED | Private company limited by shares | Live |
| FARBELL INSTRUMENT LIMITED | Private company limited by shares | Dissolved |
| HUA FENG INSTRUMENT LIMITED | Private company limited by shares | Live |
| FIRSTEC INSTRUMENT COMPANY LIMITED | Private company limited by shares | Dissolved |
| Flourish Mechanical Instrument Limited | Private company limited by shares | Live |
| FOREVER HEALTH MEDICAL INSTRUMENT LIMITED | Private company limited by shares | Live |
| FORTUNE INSTRUMENT CO., LIMITED | | Live |
| FOTOMASTER INSTRUMENT & PHOTO FINISHING CO. LIMITED | Private company limited by shares | Dissolved |
| Fule Instrument Technology (Shanghai) Co., Limited | Private company limited by shares | Live |
| FUSION MUSICAL INSTRUMENT (HK) LIMITED | Private company limited by shares | Live |
| FUYANG HENGFENG INSTRUMENT CO., LIMITED | Private company limited by shares | Live |
| SHENZHEN FUZER INSTRUMENT CO., LIMITED | Private company limited by shares | Live |
| GAOTONG INSTRUMENT CO., LIMITED | Private company limited by shares | Live |
| GECKO MUSICAL INSTRUMENT CO., LIMITED | Private company limited by shares | Live |
| GELIN CNC INSTRUMENT LIMITED | Private company limited by shares | Live |
| HK Genuoya Instrument Trade Limited | Private company limited by shares | Live |
| GEOPHYSICS INSTRUMENT LIMITED | Private company limited by shares | Live |
| GERMANY E.F PRECISION INSTRUMENT INT'L LIMITED | Private company limited by shares | Dissolved |
| GERMANY XINDELONG INSTRUMENT LIMITED | Private company limited by shares | Live |
| GREAT WIN INSTRUMENT COMPANY LIMITED | Private company limited by shares | Live |
| GREAT TEAM INSTRUMENT (H.K.) LIMITED | Private company limited by shares | Live |
| Green Instrument Co., Limited | Private company limited by shares | Live |
| ABG INSTRUMENT GROUP CO., LIMITED | Private company limited by shares | Live |
| AAA Instrument Group Co., Limited | Private company limited by shares | Live |
| EJK INSTRUMENT GROUP CO., LIMITED | Private company limited by shares | Live |
| SK INSTRUMENT GROUP CO., LIMITED | Private company limited by shares | Live |
| INSTRUMENT GROUP CO., LIMITED | Private company limited by shares | Live |
| HK YADONG INSTRUMENT INT'L GROUP LIMITED | Private company limited by shares | Live |
| GUANGDONG ZHUJIANG INSTRUMENT HOLDING LIMITED | Private company limited by shares | Live |
| GUANGDONG ZHUJIANG INSTRUMENT METERING LIMITED | Private company limited by shares | Live |
| Guangzhou Mycool Instrument Co., Limited | Private company limited by shares | Live |
| GUANGZHOU NANYANG ELECTRICAL INSTRUMENT CO., LIMITED | Private company limited by shares | Live |
| GUANGZHOU 9M MUSICAL INSTRUMENT LIMITED | Private company limited by shares | Dissolved |
| Haiming Scientific Instrument Co., Limited | Private company limited by shares | Live |
| HANGZHOU SUMER INSTRUMENT CO., LIMITED | Private company limited by shares | Live |
| HANGZHOU FUQIN INSTRUMENT CO., LIMITED | Private company limited by shares | Live |
| FRANCE HANKE INSTRUMENT CO., LIMITED | Private company limited by shares | Live |
| HAOAN INSTRUMENT (CHINA) CO., LIMITED | Private company limited by shares | Live |
| Hebikuo Musical Instrument International Co., Limited | Private company limited by shares | Live |
| Germany Heilanburg Musical Instrument Co., Limited | Private company limited by shares | Live |
| HENGQIAO INSTRUMENT LIMITED | Private company limited by shares | Live |
| HeShang Scientific Instrument (HK) Limited | Private company limited by shares | Live |
| HIGHEST INSTRUMENT COMPANY LIMITED | Private company limited by shares | Live |
| HITECH INSTRUMENT COMPANY LIMITED | Private company limited by shares | Dissolved |
| HUI MEI INSTRUMENT (HK) LIMITED | Private company limited by shares | Dissolved |
| C & K INSTRUMENT (HK) LIMITED | Private company limited by shares | Live |
| DERON INSTRUMENT (HK) LIMITED | Private company limited by shares | Live |
| GOODWILL INSTRUMENT (H.K.) LIMITED | Private company limited by shares | Dissolved |
| HONGJI INSTRUMENT (HK) LIMITED | Private company limited by shares | Live |
| HONGJI INSTRUMENT (HK) LIMITED | Private company limited by shares | Live |
| JIACHEN INSTRUMENT (HK) LIMITED | Private company limited by shares | Live |
| KETAI INSTRUMENT (HK) COMPANY LIMITED | Private company limited by shares | Live |
| SCHARP INSTRUMENT (H.K) LIMITED | Private company limited by shares | Live |
| CF Instrument Accessories (Hong Kong) Limited | Private company limited by shares | Live |
| INSTRUMENT AGENCY HONG KONG LIMITED | Private company limited by shares | Live |
| POLYTECH INSTRUMENT (HONG KONG BRANCH) LIMITED | Private company limited by shares | Live |
| Brooks Instrument (Hong Kong) Limited | Private company limited by shares | Live |
| Hong Kong Central Instrument Limited | | Live |
| XIN KE HONG DA INSTRUMENT CO., LIMITED | Private company limited by shares | Live |
| HONG KONG WAN DAI BEAUTY INSTRUMENT CO., LIMITED | Private company limited by shares | Live |
| BIOEAGLE (HONG KONG) INSTRUMENT CO., LIMITED | Private company limited by shares | Live |
| COTTRELL INSTRUMENT (HONG KONG) CO., LIMITED | Private company limited by shares | Live |
| CREATECH INSTRUMENT (HONG KONG) CO., LIMITED | Private company limited by shares | Live |
| Hong Kong Ecorete Instrument Co., Limited | | Live |
| HONG TAI INSTRUMENT (HK) CO., LIMITED | Private company limited by shares | Live |
| HOTECH (HONG KONG) INSTRUMENT CO., LIMITED | Private company limited by shares | Dissolved |
| JU REN INSTRUMENT (HONG KONG) CO., LIMITED | Private company limited by shares | Live |
| HONG KONG ACE INSTRUMENT CO., LIMITED | Private company limited by shares | Live |
| HONG KONG SUO LIN MEDICAL INSTRUMENT CO., LIMITED | Private company limited by shares | Dissolved |
| HONG KONG AN BEI ER MEDICAL INSTRUMENT CO., LIMITED | Private company limited by shares | Live |
| YUI WAH PRECISION INSTRUMENT (HONG KONG) CO., LIMITED | Private company limited by shares | Live |
| TOMRAY (HONG KONG) INSTRUMENT CO., LIMITED | Private company limited by shares | Live |
| Hong Kong Dexuanyuan Instrument Co., Limited | Private company limited by shares | Live |
| Fortune Instrument (Hong Kong) Co., Limited | Private company limited by shares | Live |
| FRIENDS INSTRUMENT (HONG KONG) CO., LIMITED | Private company limited by shares | Live |
| FUTURE INSTRUMENT (HONG KONG) CO., LIMITED | Private company limited by shares | Live |
| Hong Kong Grand Internationnal Instrument Limited | Private company limited by shares | Live |
| GREEN INSTRUMENT (HONG KONG) COMPANY LIMITED | Private company limited by shares | Live |
| GROTRIAN-STEINWEG (HONG KONG) INSTRUMENT LIMITED | Private company limited by shares | Live |
| Hong Kong Hengmei Instrument Limited | Private company limited by shares | Live |
| JOINTY (HONG KONG) INSTRUMENT CO., LIMITED | Private company limited by shares | Live |
| JUNMIN SCIENTIFIC INSTRUMENT (HONG KONG) LIMITED | Private company limited by shares | Live |
| APK Instrument (Hong Kong) Co. Limited | Private company limited by shares | Live |
| TS Instrument (Hong Kong) Limited | Private company limited by shares | Live |
| GENERAL INSTRUMENT (HONG KONG) LIMITED | Private company limited by shares | Dissolved |
| MASTER INSTRUMENT CORPORATION HONG KONG LIMITED | Private company limited by shares | Dissolved |
| UTAKA ELECTRIC INSTRUMENT (HONG KONG) COMPANY LIMITED | Private company limited by shares | Dissolved |
| Wanchuan instrument equipment (Hong Kong) Limited | | Live |
| HONG KONG NEW SANS MEASURE INSTRUMENT COMPANY LIMITED | Private company limited by shares | Live |
| HONG KIN MEDICAL INSTRUMENT LIMITED | Private company limited by shares | Live |
| HONG KONG KSD MEDICAL INSTRUMENT LIMITED | Private company limited by shares | Live |
| HONG KONG TONG XIN MEDICAL INSTRUMENT COMPANY LIMITED | Private company limited by shares | Dissolved |
| MINSTREL INSTRUMENT (HONG KONG) COMPANY LIMITED | Private company limited by shares | Live |
| HONG KONG FRITZ MUSICAL INSTRUMENT LIMITED | Private company limited by shares | Live |
| HONG KONG YIN HUANG MUSICAL INSTRUMENT LIMITED | Private company limited by shares | Live |