| SDTK LIMITED | Private company limited by shares | Dissolved |
| HONGKONG SDT-LINK ELECTRONICS LIMITED | Private company limited by shares | Live |
| S.D.V. CONSTRUCTION & ENGINEERING COMPANY LIMITED | Private company limited by shares | Live |
| SDVV BEARING GROUP LIMITED | Private company limited by shares | Live |
| SDWAN Technologies Limited | Private company limited by shares | Live |
| SDXY COLOUR PRINTING INDUSTRY CO., LIMITED | Private company limited by shares | Live |
| SDYKS LIMITED | | Live |
| SDZD. LIMITED | Private company limited by shares | Live |
| SDZS ELECTRONICS (HK) CO., LIMITED | Private company limited by shares | Dissolved |
| SDZY LIMITED | | Live |