| SPECTRO COMPANY LIMITED | Private company limited by shares | Dissolved |
| SPECTRO SYSTEM ASIA LIMITED | Private company limited by shares | Live |
| SPECTROL INVESTMENT LIMITED | Private company limited by shares | Dissolved |
| SPECTRON LIMITED | Private company limited by shares | Dissolved |
| Spectron Integrated Co., Limited | | Live |
| SPECTRON ENTERPRISES LIMITED | Private company limited by shares | Live |
| SPECTRON SCIENTIFIC (HK) LIMITED | Private company limited by shares | Dissolved |
| Marex Spectron Limited | Private company limited by shares | Live Commenced dormancy on 16-Jun-2011 |
| SPECTRON TECHNOLOGY LIMITED | Private company limited by shares | Live |
| Spectron Telecom Limited | Private company limited by shares | Live |
| Spectronic (Hong Kong) Limited | Private company limited by shares | Live |
| SPECTRONIC DIGITAL MANUFACTURING LIMITED | Private company limited by shares | Dissolved |
| SPECTRONIC MANUFACTURERS AND RESEARCH LIMITED | Private company limited by shares | Dissolved |
| M. D. SPECTRONICS LIMITED | Private company limited by shares | Dissolved |
| SPECTRONIX LIMITED | Private company limited by shares | Dissolved |
| SPECTROVISION LIMITED | Private company limited by shares | Live |