| BONWIN INTRON LIMITED | Private company limited by shares | Dissolved |
| INTRON CHEM CO., LIMITED | Private company limited by shares | Live |
| INTRON CO., LIMITED | Private company limited by shares | Dissolved |
| INTRON ELECTRONICS CO., LIMITED | Private company limited by shares | Live |
| INTRON INDUSTRIAL CO., LIMITED | Private company limited by shares | Live |
| INTRON ORIENTAL LIMITED | Private company limited by shares | Dissolved |
| INTRON RESOURCES LIMITED | Private company limited by shares | Dissolved |
| INTRON TECHNOLOGY LIMITED | Private company limited by shares | Live |
| INTRONEERS LIMITED | | Live |
| IN-TRONIC LIMITED | Private company limited by shares | Dissolved |
| INTRO-NICE COMPANY LIMITED | Private company limited by shares | Dissolved |
| INTRONICS LIMITED | Private company limited by shares | Live |
| INTRONLYTIC LIMITED | | Live |