| OPTACE TECHNOLOGIES CO., LIMITED | Private company limited by shares | Live |
| Nanpeng Optact Vision Investment Holdings Co., Limited | | Live |
| Optact Vision Limited | | Live |
| OPTAGON LIMITED | Private company limited by shares | Live |
| OptAim (HK) Limited | Private company limited by shares | Live |
| OPTAKE INDUSTRIAL LIMITED | Private company limited by shares | Live |
| Optal Asia Limited | Private company limited by shares | Live |
| Optamac HK Limited | Private company limited by shares | Live |
| OPTAMAX LIMITED | Private company limited by shares | Live |
| OPTANA LIMITED | Private company limited by shares | Dissolved |
| OPTARE CONSULTANCY LIMITED | Private company limited by shares | Live |
| OPTASIA LIMITED | Private company limited by shares | Live |
| OptAsia Healthcare Limited | Private company limited by shares | Live |
| OPTATIVE COMPANY LIMITED | Private company limited by shares | Live |