| TUNNEL COMPANY LIMITED | Private company limited by shares | Dissolved |
| TUNNEL LIMITED | Private company limited by shares | Dissolved |
| MTD-KE ABERDEEN TUNNEL OPERATIONS COMPANY LIMITED | Private company limited by shares | Live |
| TUNNEL ADVERTISING LIMITED | Private company limited by shares | Dissolved |
| ARTORIA ROAD AND TUNNEL LIGHTING LIMITED | Private company limited by shares | Dissolved |
| Clean Tunnel Air Asia Limited | | Live |
| BEST TUNNEL COMPANY LIMITED | Private company limited by shares | Dissolved |
| TUNNEL BUILDING SUPPLIES LIMITED | Private company limited by shares | Live |
| CLEAN TUNNEL AIR CHINA LIMITED | Private company limited by shares | Live |
| TUNNEL INVESTMENT (CHINA) COMPANY LIMITED | Private company limited by shares | Live |
| Tunnel Cloud Co., Limited | | Live |
| HOPE TUNNEL RESOURCES CO., LIMITED | Private company limited by shares | Live |
| TUNNEL TRADING CO., LIMITED | Private company limited by shares | Live |
| COLOUR TUNNEL LIMITED | Private company limited by shares | Dissolved |
| TUNNEL VISION COMMUNICATIONS LIMITED | Private company limited by shares | Dissolved |
| IMS TUNNEL CONSULTANCY LIMITED | Private company limited by shares | Live |
| Tunnel Technica Consulting Limited | Private company limited by shares | Live |
| LONG TUNNEL FAR EAST LIMITED | Private company limited by shares | Dissolved |
| TIME TUNNEL GLOBAL INVESTMENT LIMITED | Private company limited by shares | Live |
| GOLDEN TUNNEL LIMITED | Private company limited by shares | Dissolved |
| HANGZHOU TUNNEL HOMEWARE CO., LIMITED | Private company limited by shares | Live |
| RICH TUNNEL (HK) INVESTMENT LIMITED | Private company limited by shares | Live |
| CHINA SMART UTILITY TUNNEL HOLDINGS LIMITED | Private company limited by shares | Live |
| NEW HONG KONG TUNNEL COMPANY LIMITED | Private company limited by shares | Live |
| SHANGHAI TUNNEL (HONG KONG) COMPANY LIMITED | Private company limited by shares | Live |
| Clean Tunnel Air HongKong Co., Limited | | Live |
| EIGHTH TUNNEL INTERNATIONAL TRADING LIMITED -THE- | Private company limited by shares | Dissolved |
| King Source Tunnel Management Consultants Limited | Private company limited by shares | Live |
| ROAD KING TUNNEL MANAGEMENT LIMITED | Private company limited by shares | Dissolved |
| KOWLOON-SHATIN TUNNEL COMPANY LIMITED -THE- | Private company limited by shares | Dissolved |
| IWS Tunnel Management Limited | Private company limited by shares | Live |
| CENTRAL CROSS HARBOUR TUNNEL MANAGEMENT COMPANY LIMITED -THE- | Private company limited by shares | Dissolved |
| MACK & COMPANY TUNNEL MANAGEMENT LIMITED | Private company limited by shares | Dissolved |
| TAIWAN MAZU 88 TUNNEL WINE CO., LIMITED | Private company limited by shares | Dissolved |
| TUNNEL AND MINING COMPANY LIMITED | Private company limited by shares | Live |
| PAUL Y. (NEW TUNNEL) LIMITED | Private company limited by shares | Live |
| PAUL Y. TUNNEL ENGINEERING CO. LIMITED | Private company limited by shares | Dissolved |
| DISCOVERY BAY ROAD TUNNEL COMPANY LIMITED | Private company limited by shares | Live |
| TUNNEL ENGINEERING SERVICES (HONGKONG) LIMITED | Private company limited by shares | Live |
| Tunnel Tech Services Limited | Private company limited by shares | Dissolved |
| KUM SHING TUNNEL MANAGEMENT LIMITED | Private company limited by shares | Live |
| S.I. - PAUL Y. - CANVEST TUNNEL COMPANY LIMITED | | Live |
| TUNNEL SOLUTIONS LIMITED | Private company limited by shares | Dissolved |
| FUJIAN QUANZHOU TUNNEL SPORTING GOODS LIMITED | Private company limited by shares | Live |
| HK State Tunnel Group Limited | Private company limited by shares | Live |
| Tunnel Technologies Limited | Private company limited by shares | Live |
| Time Tunnel Limited -The- | Private company limited by shares | Live |
| TUNNEL VISION, LIMITED | Private company limited by shares | Dissolved |
| WEALTH TUNNEL LIMITED | Private company limited by shares | Live |
| SPACE TUNNEL WEISHI HOLDING CO., LIMITED | Private company limited by shares | Live |
| WELL TUNNEL LIMITED | Private company limited by shares | Dissolved |
| WESTERN HARBOUR TUNNEL COMPANY LIMITED | Private company limited by shares | Live |
| WILSON TUNNEL MANAGEMENT LIMITED | Private company limited by shares | Live |
| YEE HOP TUNNELLING COMPANY LIMITED | Private company limited by shares | Dissolved |
| MAN CHUEN TUNNELLING COMPANY LIMITED | Private company limited by shares | Live |
| BC MAN CHUEN TUNNELLING LIMITED | Private company limited by shares | Dissolved |
| EAGLESTONE TUNNELLING LIMITED | Private company limited by shares | Dissolved |
| 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 |