| MIDA OPTIPRODUCTS MANUFACTURING LIMITED | Private company limited by shares | Live |
| OPTIQE LIMITED | Private company limited by shares | Live |
| OPTIQUE LED LIMITED | Private company limited by shares | Dissolved |
| OPTIQUE OMNI (H.K.) LIMITED | Private company limited by shares | Dissolved |
| OPTIQUE INTERNATIONAL, LIMITED | Private company limited by shares | Dissolved |
| OPTIROAM LIMITED | Private company limited by shares | Live |
| OptiRom Co., Limited | Private company limited by shares | Live |
| OPTISOLUTION LIMITED | Private company limited by shares | Live |
| OPTISTORAGE (H.K.) COMPANY LIMITED | Private company limited by shares | Dissolved |
| Opti-sun Trade Limited | Private company limited by shares | Live |
| Optisuns Vision Limited | Private company limited by shares | Live |
| Optitech Investments Limited | Private company limited by shares | Live |
| OptiTech Precision Mould Co., Limited | Private company limited by shares | Live |
| Optitek Limited | Private company limited by shares | Live |
| OPTITEX ASIA LIMITED | Private company limited by shares | Live |
| OptiTrade Pro Limited | | Live |
| OPTITUNE ASIA LIMITED | Private company limited by shares | Live |
| OPTIUM JOY LIMITED | Private company limited by shares | Live |
| OPTIVA LIMITED | Private company limited by shares | Live |
| OPTIVA ASIA, LIMITED | Private company limited by shares | Dissolved |
| Optiver Alternative Investments HK Limited | Private company limited by shares | Live |
| OPTIVER HOLDING HONG KONG LIMITED | Private company limited by shares | Live |
| OPTIVER INVESTMENT HONG KONG LIMITED | Private company limited by shares | Dissolved |
| OPTIVER TRADING HONG KONG LIMITED | Private company limited by shares | Live |
| Optivest Capital Limited | Private company limited by shares | Live |
| OPTIVIEW COMPANY LIMITED | Private company limited by shares | Live |
| OPTIWAY (ASIA) COMPANY LIMITED | Private company limited by shares | Live |
| Optiwise Company Limited | Private company limited by shares | Live |
| NEO OPTIX LIMITED | Private company limited by shares | Live |
| Optix Consultancy Limited | | Live |
| Optix Investment Limited | Private company limited by shares | Live |
| OPTIX RESEARCH INC LIMITED | Private company limited by shares | Live |
| OPTIX SOLUTIONS LIMITED | Private company limited by shares | Live |
| SUNBOND OPTIX LIMITED | Private company limited by shares | Live |
| Optizone Laser Limited | Private company limited by shares | Dissolved |
| Optizone Technology Limited | Private company limited by shares | Live |
| OptiZ-OPTO Display Co., Limited | Private company limited by shares | Live |
| Optlink Technology Co., Limited | Private company limited by shares | Live |
| OPTLITE INTERNATIONAL CO., LIMITED | Private company limited by shares | Live |
| OPTLUX COMPANY LIMITED | Private company limited by shares | Dissolved |
| OPTMAR LIMITED | Private company limited by shares | Live |
| Optmaster Limited | | Live |
| OPTMEL INTERNATIONAL LIMITED | Private company limited by shares | Live |
| OptNet Limited | | Live |
| OPTO COMPANY LIMITED | Private company limited by shares | Dissolved |
| Opto Limited | Private company limited by shares | Live |
| ST Opto Company Limited | Private company limited by shares | Live |
| Opto X Company Limited | Private company limited by shares | Live |
| OPTO ASIA LIMITED | Private company limited by shares | Live |
| Augmax Opto Electronics Limited | Private company limited by shares | Live |
| BARLEY OPTO ELECTRONICS LIMITED | Private company limited by shares | Live |
| SHENZHEN CESTA OPTO LIMITED | Private company limited by shares | Live |
| China Opto Investment Limited | Private company limited by shares | Live |
| HK LCM OPTO CO., LIMITED | Private company limited by shares | Dissolved |
| CET OPTO CO., LIMITED | Private company limited by shares | Live |
| JVB OPTO CO., LIMITED | Private company limited by shares | Live |
| L&F OPTO CO., LIMITED | Private company limited by shares | Live |
| BESD OPTO HK CO., LIMITED | Private company limited by shares | Live |
| AMERICAN LIGHT OPTO ELECTRIC TECH CO., LIMITED | Private company limited by shares | Live |
| VCC Opto Electronics Co., Limited | Private company limited by shares | Live |
| GLORY OPTO ELECTRONICS CO., LIMITED | Private company limited by shares | Live |
| EVEREST OPTO CO., LIMITED | Private company limited by shares | Live |
| GOODFEEL OPTO CO., LIMITED | Private company limited by shares | Live |
| Hison Opto Co., Limited | Private company limited by shares | Live |
| WONDER OPTO ELECTRONICS TECHNOLOGY (H.K) CO., LIMITED | Private company limited by shares | Live |
| RUILING OPTO ELECTRONIC (HONG KONG) CO., LIMITED | Private company limited by shares | Live |
| HONGKONG FORTUNE WARREN OPTO ELECTRONIC CO., LIMITED | Private company limited by shares | Dissolved |
| HONGKONG JIBTEL OPTO ELECTRONIC INTERNATIONAL CO., LIMITED | Private company limited by shares | Dissolved |
| INHERE OPTO CO., LIMITED | Private company limited by shares | Live |
| OPTO LIGHTINGZONE CO., LIMITED | Private company limited by shares | Live |
| MASON OPTO CO., LIMITED | Private company limited by shares | Live |
| Shenzhen ACE Opto Co., Limited | Private company limited by shares | Dissolved |
| STRONGLUMEN OPTO CO., LIMITED | Private company limited by shares | Live |
| SUNLUX OPTO CO., LIMITED | Private company limited by shares | Live |
| Supra Opto Co., Limited | Private company limited by shares | Live |
| SHENZHEN ZXSHENG OPTO CO., LIMITED | Private company limited by shares | Live |
| OPTO CONSTRUCTION LIMITED | Private company limited by shares | Live |
| Colorful Opto Corp Limited | Private company limited by shares | Live |
| COWRIVOL OPTO COMPANY LIMITED | Private company limited by shares | Live |
| OPTO SIGN FAR EAST LIMITED | Private company limited by shares | Dissolved |
| EFILUX OPTO ELECTRIC LIMITED | Private company limited by shares | Live |
| CONCORD OPTO ELECTRIC HOLDING LIMITED | Private company limited by shares | Live |
| VISION OPTO ELECTRONIC LIMITED | Private company limited by shares | Live |
| NEW OPTO ELECTRONICS LIMITED | Private company limited by shares | Dissolved |
| LAC OPTO ELECTRONICS COMPANY LIMITED | Private company limited by shares | Live |
| NS OPTO ELECTRONICS LIMITED | Private company limited by shares | Live |
| OPTO MEI ELECTRONICS LIMITED | Private company limited by shares | Live |
| NAN JIE OPTO ELECTRONICS COMPANY LIMITED | Private company limited by shares | Live |
| GI OPTO ELECTRONICS LIMITED | Private company limited by shares | Dissolved |
| ALPINE OPTO ELECTRONICS LIMITED | Private company limited by shares | Dissolved |
| ALPINE OPTO ELECTRONICS LIMITED | Private company limited by shares | Live |
| Opto Power Electronics Limited | Private company limited by shares | Live |
| EVERBRITE OPTO LIMITED | Private company limited by shares | Live |
| GLIGHT OPTO WORKS LIMITED | Private company limited by shares | Live |
| HAKKO OPTO LIMITED | Private company limited by shares | Live |
| Hangzhou HPWINNER Opto Limited | Private company limited by shares | Live |
| SHENZHEN HANHUA OPTO CO., LIMITED | Private company limited by shares | Live |
| GRAND HALO OPTO ELECTRONIC INTERNATIONAL (H.K.) LIMITED | Private company limited by shares | Live |
| OPTO HOLDING LIMITED | Private company limited by shares | Dissolved |
| OPTO HONG KONG LIMITED | Private company limited by shares | Live |