| CURTIS INSTRUMENTS (HONG KONG) LIMITED | Private company limited by shares | Live |
| FLYCHORD MUSICAL INSTRUMENTS (HONG KONG) LIMITED | Private company limited by shares | Live |
| GEOTECHNICAL INSTRUMENTS (HONG KONG) LIMITED | Private company limited by shares | Dissolved |
| Hong Kong Hitech Instruments Co., Limited | | Live |
| Huake Instruments (Hong Kong) Co., Limited | Private company limited by shares | Live |
| J.P. INSTRUMENTS (HONG KONG) LIMITED | Private company limited by shares | Live |
| HONG KONG INSTRUMENTS LIMITED | Private company limited by shares | Dissolved |
| OBT INSTRUMENTS (HONG KONG) COMPANY, LIMITED | Private company limited by shares | Dissolved |
| MKS INSTRUMENTS (HONG KONG) LIMITED | Private company limited by shares | Live |
| RUI DE INSTRUMENTS (HONG KONG) LIMITED | Private company limited by shares | Dissolved |
| AI INSTRUMENTS (HONG KONG) LIMITED | Private company limited by shares | Live |
| HONG KONG INSTRUMENTS LIMITED | Private company limited by shares | Live |
| PCE Instruments Hong Kong Limited | Private company limited by shares | Live |
| KS Instruments Hong Kong Limited | Private company limited by shares | Live |
| CAD Instruments (Hong Kong) Limited | Private company limited by shares | Live |
| NEW CENTURY (HONG KONG) INSTRUMENTS LIMITED | Private company limited by shares | Live |
| Native Instruments Hong Kong Limited | Private company limited by shares | Live |
| Opten Instruments (Hong Kong) Limited | Private company limited by shares | Dissolved |
| Peak Scientific Instruments Hong Kong Limited | Private company limited by shares | Live |
| LECO INSTRUMENTS HONG KONG LIMITED | Private company limited by shares | Live |
| Loudly Instruments (Hong Kong) Co., Limited | Private company limited by shares | Live |
| HONG KONG SURGICAL INSTRUMENTS MANUFACTURING COMPANY LIMITED | Private company limited by shares | Live |
| Hong Kong Scientific Instruments & Materials Limited | Private company limited by shares | Live |
| Hong Kong Musical Instruments Company Limited | Private company limited by shares | Dissolved |
| Hong Kong Rumiko Instruments Limited | Private company limited by shares | Live |
| SCIENTIFIC INSTRUMENTS (HONG KONG) LIMITED | Private company limited by shares | Dissolved |
| STAR (HONG KONG) INSTRUMENTS COMPANY LIMITED | Private company limited by shares | Live |
| WINCO Technology Instruments (Hong Kong) Limited | | Live |
| TEXAS INSTRUMENTS HONG KONG LIMITED | Private company limited by shares | Live |
| Virtual Instruments Hong Kong Limited | Private company limited by shares | Live |
| HONG KONG WELL INSTRUMENTS CO., LIMITED | Private company limited by shares | Live |
| Xiangkang Precision Instruments (Hong Kong) Limited | | Live |
| YANCHI SCIENTIFIC INSTRUMENTS (HONG KONG) LIMITED | Private company limited by shares | Live |
| ALTAMIRA INSTRUMENTS (HONGKONG) LIMITED | Private company limited by shares | Live |
| PUSHENG INSTRUMENTS (HONGKONG) CO., LIMITED | Private company limited by shares | Live |
| HongKong Technology And Science Instruments Limited | Private company limited by shares | Live |
| HONY PRECISION INSTRUMENTS CO., LIMITED | Private company limited by shares | Live |
| Instruments of Hope Limited | Company limited by guarantee | Live |
| SINA LAB AND HOSPITAL INSTRUMENTS LIMITED | Private company limited by shares | Live |
| Hownes instruments trading Co., Limited | | Live |
| HUACE INSTRUMENTS CO., LIMITED | Private company limited by shares | Live |
| HUAYUN MUSICAL INSTRUMENTS HONGKONG LIMITED | Private company limited by shares | Live |
| Huixi Scientific Instruments (Hong Kong) Company Limited | Private company limited by shares | Live |
| HyWire Instruments Limited | Private company limited by shares | Live |
| iBest Instruments Limited | Private company limited by shares | Live |
| EVERBRIGHT IMAGING INSTRUMENTS COMPANY LIMITED | | Live |
| TOPS INSTRUMENTS H.K. INC. LIMITED | Private company limited by shares | Dissolved |
| MAN LEE HANG INDUSTRIAL INSTRUMENTS LIMITED | Private company limited by shares | Dissolved |
| INFINITY INSTRUMENTS LIMITED | Private company limited by shares | Live |
| INFOLD SCIENTIFIC INSTRUMENTS CO., LIMITED | Private company limited by shares | Live |
| Infotraffic Instruments Limited | Private company limited by shares | Live |
| INJIE PRECISION INSTRUMENTS CO., LIMITED | Private company limited by shares | Live |
| DHS INSTRUMENTS INTERNATIONAL LIMITED | Private company limited by shares | Dissolved |
| Instruments International Limited | Private company limited by shares | Live |
| BMH INSTRUMENTS (INTERNATIONAL) COMPANY LIMITED | Private company limited by shares | Live |
| GUANGZHOU DACHENG INTERNATIONAL ELECTRONIC INSTRUMENTS LIMITED | Private company limited by shares | Live |
| Invech Instruments Limited | Private company limited by shares | Live |
| Ithatron Instruments (HongKong) Limited | Private company limited by shares | Live |
| IUKE MUSICAL INSTRUMENTS LIMITED | Private company limited by shares | Live |
| JACKY INSTRUMENTS LIMITED | Private company limited by shares | Live |
| JECTRONIC INSTRUMENTS LIMITED | Private company limited by shares | Live |
| HK JERRY MUSICAL INSTRUMENTS LIMITED | Private company limited by shares | Live |
| Jinhu Xudong Instruments Limited | Private company limited by shares | Live |
| JOINSCIENCE INSTRUMENTS (H.K.) LIMITED | Private company limited by shares | Dissolved |
| JOURNEY INSTRUMENTS LIMITED | Private company limited by shares | Live |
| KAMU INSTRUMENTS (INTERNATIONAL) LIMITED | Private company limited by shares | Live |
| KAPPA INSTRUMENTS LIMITED | Private company limited by shares | Live |
| KIMO INSTRUMENTS LIMITED | Private company limited by shares | Live |
| KING HIGHER MUSIC INSTRUMENTS CO., LIMITED | Private company limited by shares | Dissolved |
| KINGSCI INSTRUMENTS TECHNOLOGY CO., LIMITED | Private company limited by shares | Live |
| KROHNE MEASUREMENT INSTRUMENTS LIMITED | | Live |
| Lablink Instruments Limited | | Live |
| LABMED INSTRUMENTS COMPANY LIMITED | Private company limited by shares | Live |
| FRITSCH HONG KONG LABORATORY INSTRUMENTS LIMITED | Private company limited by shares | Dissolved |
| LABTECH INSTRUMENTS (HONG KONG) LIMITED | Private company limited by shares | Dissolved |
| LANQIN CLEANING INSTRUMENTS LIMITED | Private company limited by shares | Dissolved |
| Lava Instruments Company Limited | | Live |
| LEADER INSTRUMENTS (H.K.) LIMITED | Private company limited by shares | Dissolved |
| LeadTech Instruments International Co Limited | | Live |
| Leiyum Scientific Instruments Limited | Private company limited by shares | Live |
| LETECH INSTRUMENTS LIMITED | Private company limited by shares | Dissolved |
| LIND INSTRUMENTS (HONGKONG) LIMITED | Private company limited by shares | Live |
| LINK SCIENTIFIC INSTRUMENTS (HONGKONG) LIMITED | Private company limited by shares | Live |
| Linker Instruments (Hongkong) Co., Limited | Private company limited by shares | Live |
| LINXON INSTRUMENTS COMPANY LIMITED | Private company limited by shares | Live |
| LONGERTECH INSTRUMENTS LIMITED | Private company limited by shares | Live |
| LONGWEI INSTRUMENTS (HK) CO., LIMITED | Private company limited by shares | Live |
| MACH INSTRUMENTS COMPANY LIMITED | Private company limited by shares | Dissolved |
| MAPLE INSTRUMENTS LIMITED | Private company limited by shares | Dissolved |
| MARS INSTRUMENTS LIMITED | Private company limited by shares | Live |
| China Instruments New Material International Limited | | Live |
| SINO-TECH INSTRUMENTS & MATERIALS (HongKong) Co., LIMITED | Private company limited by shares | Live |
| OCEAN INSTRUMENTS & MATERIALS (HK) LIMITED | Private company limited by shares | Live |
| YUE XIU MEDICAL INSTRUMENTS COMPANY LIMITED | Private company limited by shares | Dissolved |
| WE RUN MEDICAL INSTRUMENTS COMPANY LIMITED | Private company limited by shares | Dissolved |
| YOU YI MEDICAL INSTRUMENTS LIMITED | Private company limited by shares | Dissolved |
| WAH HON MEDICAL INSTRUMENTS COMPANY LIMITED | Private company limited by shares | Dissolved |
| 3-MED MEDICAL INSTRUMENTS COMPANY LIMITED | Private company limited by shares | Dissolved |
| Baiansy Medical Instruments Limited | Private company limited by shares | Live |
| CHAO YUE MEDICAL INSTRUMENTS (HK) LIMITED | Private company limited by shares | Live |