| ADCO LIMITED | Private company limited by shares | Live |
| ADCO CONSULTANTS LIMITED | Private company limited by shares | Dissolved |
| ADCO ENGINEERING LIMITED | Private company limited by shares | Dissolved |
| ADCO ENGINEERING LIMITED | Private company limited by shares | Dissolved |
| ADCO ENTERPRISES LIMITED | Private company limited by shares | Live |
| ADCO GROUP LIMITED | Private company limited by shares | Live |
| ADCO (H.K.) LIMITED | Private company limited by shares | Live |
| ADCO INDUSTRIAL LIMITED | Private company limited by shares | Dissolved |
| ADCO INDUSTRIAL LIMITED | Private company limited by shares | Dissolved |
| ADCO INTERNATIONAL LIMITED | Private company limited by shares | Dissolved |
| ADCO INTERNATIONAL LIMITED | Private company limited by shares | Live |
| ADCO INVESTMENT LIMITED | Private company limited by shares | Dissolved |
| ADCO INVESTMENT LIMITED | Private company limited by shares | Live |
| ADCO MANAGEMENT LIMITED | Private company limited by shares | Dissolved |
| ADCO PACIFIC LIMITED | Private company limited by shares | Dissolved |
| ADCO POWER LIMITED | Private company limited by shares | Live |
| ADCO DESIGN & PRINTING LIMITED | Private company limited by shares | Dissolved |
| ADCO PRODUCTION LIMITED | Private company limited by shares | Live |
| ADCO DESIGN & PRODUCTION LIMITED | Private company limited by shares | Dissolved |
| ADCO PRODUCTION (HK) LIMITED | Private company limited by shares | Live |
| ADCO PROPERTIES LIMITED | Private company limited by shares | Dissolved |
| ADCO TECHNOLOGIES LIMITED | Private company limited by shares | Dissolved |
| ADCO TRADING LIMITED | Private company limited by shares | Live |
| ADCOHESION LIMITED | Private company limited by shares | Dissolved |
| HK ADcoins Limited | Private company limited by shares | Dissolved |
| AD-COLOUR LIMITED | Private company limited by shares | Dissolved |
| AD-COM. CO. LIMITED | Private company limited by shares | Dissolved |
| Adcomm Limited | Private company limited by shares | Live |
| AD-COMM ENTERPRISES LIMITED | Private company limited by shares | Live |
| Momentum Ad-Communications Limited | Private company limited by shares | Live |
| AdComp (China) Co., Limited | Private company limited by shares | Live |
| adcomp Advanced Communication Products Co., Limited | Private company limited by shares | Live |
| ADCOMPTECH LIMITED | Private company limited by shares | Live |
| AD-CONCEPT ADVERTISING LIMITED | Private company limited by shares | Dissolved |
| AD-CONCEPTS CO. LIMITED | Private company limited by shares | Dissolved |
| ADCONNECT LIMITED | | Live |
| Adconnect Hong Kong Limited | Private company limited by shares | Live |
| ADCOR ( HONG KONG ) LIMITED | Private company limited by shares | Dissolved |
| ADCORP LIMITED | Private company limited by shares | Dissolved |
| ADCORP LIMITED | Private company limited by shares | Live |