| TECHCO LIMITED | Private company limited by shares | Dissolved |
| TECHCO LIMITED | Private company limited by shares | Dissolved |
| A-Rolux Illuminations Tech.Co., Limited | Private company limited by shares | Live |
| Techco Asia Limited | Private company limited by shares | Live |
| TECHCO (CHINA) LIMITED | Private company limited by shares | Dissolved |
| TECHCO (CHINA) LIMITED | Private company limited by shares | Live |
| TECHCO DESIGN CO., LIMITED | Private company limited by shares | Live |
| TECHCO ELECTRICAL ENGINEERING SERVICE CO., LIMITED | Private company limited by shares | Live |
| TECHCO CONSULTANT LIMITED | Private company limited by shares | Dissolved |
| TECHCO CORPORATION LIMITED | Private company limited by shares | Live |
| TECH-CO DEVELOPMENT LIMITED | Private company limited by shares | Live |
| TECHCO DEVELOPMENT LIMITED | Private company limited by shares | Dissolved |
| TECHCO DEVELOPMENT COMPANY LIMITED | | Live |
| TECHCO INVESTMENT DEVELOPMENT LIMITED | Private company limited by shares | Live |
| TECHCO TECHNOLOGY DEVELOPMENT LIMITED | Private company limited by shares | Live |
| TSUBA TECHCO DEVELOPMENT LIMITED | Private company limited by shares | Dissolved |
| TECHCO ELECTRICAL COMPANY LIMITED | Private company limited by shares | Live |
| TECHCO ELECTRONICS LIMITED | Private company limited by shares | Dissolved |
| TECHCO ENGINEERING LIMITED | Private company limited by shares | Live |
| TECHCO ELECTRICAL ENGINEERING LIMITED | Private company limited by shares | Live |
| Techco Plastic Engineering Company Limited | Private company limited by shares | Live |
| TECHCO ENTERPRISE LIMITED | Private company limited by shares | Dissolved |
| E.T. TECHCO LIMITED | Private company limited by shares | Dissolved |
| TECHCO (H.K.) LIMITED | Private company limited by shares | Dissolved |
| TECHCO ELECTRICAL (HK) COMPANY LIMITED | Private company limited by shares | Live |
| TECHCO ENGINEERING (HK) LIMITED | Private company limited by shares | Live |
| TECHCO HOLDINGS LIMITED | Private company limited by shares | Dissolved |
| TECHCO HOLDINGS LIMITED | Private company limited by shares | Live |
| TECHCO HOLDINGS LIMITED | | Live |
| Techco Investment Holdings Limited | Private company limited by shares | Live |
| TECHCO HONG KONG LIMITED | Private company limited by shares | Live |
| HONGKONG YANGYI TECHCO., LIMITED | Private company limited by shares | Live |
| TECHCO INDUSTRIES LIMITED | Private company limited by shares | Dissolved |
| TECHCO INTERNATIONAL LIMITED | Private company limited by shares | Dissolved |
| TECHCO INTERNATIONAL ENGINEERING COMPANY LIMITED | Private company limited by shares | Dissolved |
| TECHCO INTERNATIONAL ENTERPRISE LIMITED | Private company limited by shares | Dissolved |
| TECHCO INVESTMENT INTERNATIONAL LIMITED | Private company limited by shares | Live |
| Star Techco International Co., Limited | Private company limited by shares | Dissolved |
| TECHCO INTERNATIONAL TRADING LIMITED | Private company limited by shares | Dissolved |
| TECHCO INTERNATIONAL TRADING CO., LIMITED | Private company limited by shares | Live |
| TECHCO INVESTMENT LIMITED | Private company limited by shares | Dissolved |
| TECHCO INVESTMENT LIMITED | Private company limited by shares | Live |
| KING TECHCO (HONGKONG) LIMITED | Private company limited by shares | Live |
| Ningbo Lanquan Electronics Tech.Co., Limited | | Live |
| ShenZhen Lianhua Tech.Co., Limited | Private company limited by shares | Live |
| HK MIWA TECH.CO., LIMITED | Private company limited by shares | Live |
| TECHCO OVERSEAS LIMITED | Private company limited by shares | Dissolved |
| TECHCO PIPES & FITTINGS LIMITED | Private company limited by shares | Dissolved |
| TECHCO POWER LIMITED | Private company limited by shares | Live |
| TECHCO PROPERTIES LIMITED | Private company limited by shares | Live |
| SEASAN TECH.CO., LIMITED | Private company limited by shares | Live |
| TECHCO SERVICES LIMITED | Private company limited by shares | Dissolved |
| TECHCO ENGINEERING SERVICES LIMITED | Private company limited by shares | Dissolved |
| TECH-CO (TESTING SERVICES) LIMITED | Private company limited by shares | Live |
| NEW SPACE (SHANGHAI) SMART TECH.CO., LIMITED | | Live |
| PO SHING TECHCO LIMITED | Private company limited by shares | Dissolved |
| TECH-CO SOLUTION LIMITED | Private company limited by shares | Live |
| Eternal Spring Tech.Co., Limited | Private company limited by shares | Live |
| Techco Special Steel Limited | Private company limited by shares | Live |
| TECHCO SYSTEMS LIMITED | Private company limited by shares | Dissolved |
| HK TANSCEN TECH.CO., LIMITED | Private company limited by shares | Live |
| TECHCO TECHNOLOGIES LIMITED | Private company limited by shares | Live |
| TECHCO TECHNOLOGY LIMITED | Private company limited by shares | Live |
| TECHCO TESTING COMPANY LIMITED | Private company limited by shares | Dissolved |
| TECHCO TRADING LIMITED | Private company limited by shares | Dissolved |
| TECHCODE LIMITED | Private company limited by shares | Dissolved |
| TECHCOIN LIMITED | Private company limited by shares | Dissolved |
| TECHCOIN LIMITED | Private company limited by shares | Live |
| SBS TECH.COM LIMITED | Private company limited by shares | Live |
| TECHCOM (ASIA) LIMITED | Private company limited by shares | Dissolved |
| TechCom Aviation Service Limited | Private company limited by shares | Live |
| TECHCOM CIRCUITS LIMITED | Private company limited by shares | Live |
| TECHCOM CONSULTANCY LIMITED | Private company limited by shares | Dissolved |
| Techcom Technology and Consultants Limited | Private company limited by shares | Live |
| TECHCOM DEVELOPMENT (HK) LIMITED | Private company limited by shares | Dissolved |
| TECHCOM ELECTRONICS (ASIA) LIMITED | Private company limited by shares | Live |
| TECH-COM ENTERPRISES, LIMITED | Private company limited by shares | Dissolved |
| MOUNT FIELD TECHCOM LIMITED | Private company limited by shares | Dissolved |
| TECHCOM (HK) LIMITED | Private company limited by shares | Dissolved |
| TECH-COM (HK) LIMITED | Private company limited by shares | Dissolved |
| TECHCOM INTERNATIONAL LIMITED | Private company limited by shares | Live |
| FAIRYLAND INTERNATIONAL TECH&COM LIMITED | Private company limited by shares | Live |
| TECHCOM INTERNATIONAL (HONG KONG) LIMITED | Private company limited by shares | Dissolved |
| MEGA TECHCOM LIMITED | Private company limited by shares | Live |
| TECHCOM PRODUCTION LIMITED | Private company limited by shares | Live |
| TECHCOM SECURITY TECHNOLOGY LIMITED | Private company limited by shares | Live |
| SUN TECHCOM SERVICES LIMITED | Private company limited by shares | Live |
| TECHCOM SYSTEM LIMITED | Private company limited by shares | Dissolved |
| TECHCOM TECHNOLOGY LIMITED | Private company limited by shares | Dissolved |
| TECHCOM TRADING LIMITED | Private company limited by shares | Live |
| V-NET TECHCOM COMPANY LIMITED | Private company limited by shares | Live |
| TECHCOME COMMUNICATION GROUP LIMITED | Private company limited by shares | Dissolved |
| TECHCOME INTERNATIONAL DEVELOPMENT LIMITED | Private company limited by shares | Dissolved |
| TECHCOMM LIMITED | Private company limited by shares | Dissolved |
| TECHCOMM DIGITAL LIMITED | Private company limited by shares | Live |
| TECHCOMM ELECTRONICS LIMITED | Private company limited by shares | Live |
| Techcomm International Limited | Private company limited by shares | Live Commenced dormancy on 12-Jul-2013 |
| TECHCOMM SOLUTIONS LIMITED | Private company limited by shares | Live |
| TECHCOMM TECHNOLOGY LIMITED | Private company limited by shares | Live |
| TECH-COMMUNICATION ENG. LIMITED | Private company limited by shares | Live |