| Tunnelling Engineering (Hong Kong) Corp. Limited | Private company limited by shares | Live |
| SMART WIN ENGINEERING & TUNNELLING LIMITED | Private company limited by shares | Live |
| Herrenknecht Tunnelling Equipment Hong Kong Limited | Private company limited by shares | Live |
| TUNNELLING EQUIPMENT AND SERVICES LIMITED | Private company limited by shares | Live |
| KANE, TUNNELLING (HONG KONG) LIMITED | Private company limited by shares | Dissolved |
| CHINA TUNNELLING INTERNATIONAL CO., LIMITED | Private company limited by shares | Live |
| KANE TUNNELLING LIMITED | Private company limited by shares | Live Ceased dormancy on 06-Dec-2010 |
| RED TUNNELLING SERVICES LIMITED | Private company limited by shares | Live |
| tunnelNet Limited | | Live |
| TUNNEX LIMITED | Private company limited by shares | Dissolved |
| EASY TUNNING AGENCIES COMPANY LIMITED | Private company limited by shares | Live |
| STAR TUNNING PROPERTY LIMITED | Private company limited by shares | Live |
| TUNNING INSURANCE SERVICES LIMITED | Private company limited by shares | Live |
| Tunno Ocean Digital Technology Limited | | Live |
| Tunny Limited | | Live |
| TUNON COMPANY LIMITED | Private company limited by shares | Dissolved |
| TUNON INVESTMENT LIMITED | Private company limited by shares | Dissolved |
| TUNPAK INDUSTRY CO., LIMITED | Private company limited by shares | Live |
| TUN'S PAPER (HOLDINGS) LIMITED | Private company limited by shares | Live |
| HONG KONG TUN'S PAPER LIMITED | Private company limited by shares | Live |
| TUNSBRIDGE (CHINA TRADE) LIMITED | Private company limited by shares | Dissolved |
| TUNSBRIDGE INVESTMENTS CO. LIMITED | Private company limited by shares | Dissolved |
| TUNSBRIDGE TRADING COMPANY LIMITED | Private company limited by shares | Dissolved |
| TUNSEM ELECTRONICS TECHNOLOGY (HK) CO., LIMITED | Private company limited by shares | Live |
| Tunsgate Limited | Private company limited by shares | Live |
| TUNSHIAR INTERNATIONAL (HK) LIMITED | Private company limited by shares | Live |
| TUNSO CO. LIMITED | Private company limited by shares | Live |
| TUNSON ENGINEERING COMPANY LIMITED | Private company limited by shares | Dissolved |
| TUNSON INVESTMENT LIMITED | Private company limited by shares | Dissolved |
| Tunson Travel Limited | | Live |
| TUNSTALL LIMITED | Private company limited by shares | Dissolved |
| TUNSTALL AGENCIES LIMITED | Private company limited by shares | Dissolved |
| TUNSTALL JEWELRY CO., LIMITED | | Live |
| TUNSTAR ENTERPRISES LIMITED | Private company limited by shares | Dissolved |
| TUNSUN LIMITED | Private company limited by shares | Dissolved |
| TUNSUN INVESTMENT LIMITED | Private company limited by shares | Dissolved |
| TUNSY INVESTMENT COMPANY LIMITED | Private company limited by shares | Dissolved |
| TUNTEX CARPET COMPANY LIMITED | Private company limited by shares | Live |
| TUNTEX (HONG KONG) COMPANY LIMITED | Private company limited by shares | Dissolved |
| TUNTEX TRADING LIMITED | Private company limited by shares | Dissolved |
| CHINA TUNTIAN (HK) INTERNATIONAL HOLDINGS APPAREL CO., LIMITED | Private company limited by shares | Live |
| TUNTIGA NAVIGATION COMPANY LIMITED | Private company limited by shares | Dissolved |
| Tuntopower Co., Limited | Private company limited by shares | Live |
| TUNTRIO LIMITED | Private company limited by shares | Dissolved |
| TUNTUA HYVALTA LIMITED | | Live |
| TUNVOR COMPANY LIMITED | Private company limited by shares | Dissolved |
| TUNWEN LIMITED | Private company limited by shares | Dissolved |
| Cuandong Tunxi Co., Limited | Private company limited by shares | Live |
| TUNYAK LIMITED | Private company limited by shares | Live |
| TUNYAK INVESTMENT LIMITED | Private company limited by shares | Dissolved |
| TUNYO ELECTRONICS INDUSTRY CO., LIMITED | Private company limited by shares | Dissolved |