| ATRA LIMITED | Private company limited by shares | Live |
| ATRA Corporation Limited | Private company limited by shares | Live |
| ATRA TRADING INTERNATIONAL LIMITED | Private company limited by shares | Live |
| ATRA TRADING LIMITED | | Live |
| ATRAC LIMITED | Private company limited by shares | Dissolved |
| ATRAC TRADING LIMITED | Private company limited by shares | Dissolved |
| ATRACC LIMITED | Private company limited by shares | Dissolved |
| ATRACC (HONG KONG) LIMITED | Private company limited by shares | Dissolved |
| A-TRACK HUMAN RESOURCES CONSULTANCY LIMITED | Private company limited by shares | Dissolved |
| ATRACON LIMITED | Private company limited by shares | Dissolved |
| ATRACTIS LIMITED | Private company limited by shares | Live |
| A-TRADE LIMITED | Private company limited by shares | Live |
| A-Trade Finance Limited | Private company limited by shares | Dissolved |
| ATRADE TECHNOLOGY LIMITED | Private company limited by shares | Dissolved |
| Atrade365 Limited | | Live |
| ATrademark.com Limited | Private company limited by shares | Live |
| ATRADIUS COLLECTIONS LIMITED | Private company limited by shares | Live |
| atrain Limited | Private company limited by shares | Live |
| Atrak Company Limited | Private company limited by shares | Live |
| ATRAN LIMITED | Private company limited by shares | Dissolved |
| Atranquillo LIMITED | Private company limited by shares | Live |
| ATR-ART INTERNATIONAL LIMITED | Private company limited by shares | Live |
| ATR-ASIA TOURISM RELATIONS LIMITED | Private company limited by shares | Live |
| ATRAWARE LIMITED | Private company limited by shares | Dissolved |
| Atree HK Limited | Private company limited by shares | Dissolved |
| ATREE TECHNOLOGY LIMITED | Private company limited by shares | Dissolved |
| HONGKONG ATREERU PERSONAL HEALTH CARE CORPORATION LIMITED | Private company limited by shares | Live |
| ATREIDES LIMITED | Private company limited by shares | Live Commenced dormancy on 19-Apr-2016 |
| ATREIDES Limited | | Live |
| ATREIU ASIA HOLDING LIMITED | Private company limited by shares | Live |
| ATREND ENTERPRISE LIMITED | Private company limited by shares | Dissolved |
| ATrend Fashion Limited | Private company limited by shares | Live |
| A-TREND TECHNOLOGY (HONG KONG) COMPANY LIMITED | Private company limited by shares | Dissolved |
| ATREND ENTERPRISES ASIA PACIFIC LIMITED | Private company limited by shares | Live |
| ATREUS GROUP LIMITED | Private company limited by shares | Live |
| ATREX MANUFACTORY COMPANY LIMITED | Private company limited by shares | Dissolved |
| ATREX SALES LIMITED | Private company limited by shares | Live |
| ATRI LIMITED | Private company limited by shares | Live |
| ATRIA LIMITED | Private company limited by shares | Dissolved |
| Atria Pte Limited | Private company limited by shares | Dissolved |
| ATRIA LIMITED | Private company limited by shares | Live |
| ATRIA HOLDING LIMITED | | Live |
| Atria Holdings Limited | Private company limited by shares | Live |
| ATRIA International Limited | Private company limited by shares | Live |
| Atria Light Hong Kong Limited | Private company limited by shares | Live |
| ATRIA PROPERTIES COMPANY LIMITED | Private company limited by shares | Live |
| ATRIA SOFTWARE LIMITED | Private company limited by shares | Live |
| ATRICA HONG KONG LIMITED | Private company limited by shares | Dissolved |
| ATRICS INDUSTRY (HK) LIMITED | Private company limited by shares | Dissolved |
| Atrid Limited | Private company limited by shares | Live |
| ATRILL LIMITED | Private company limited by shares | Dissolved |
| Atrina Company Limited | Private company limited by shares | Live |
| ATRINA JEWELLERY LIMITED | Private company limited by shares | Dissolved |
| ATRINA TRADING CO., LIMITED | | Live |
| ATRINAGA COMPANY LIMITED | Private company limited by shares | Live |
| ATRIO LIMITED | Private company limited by shares | Dissolved |
| ATRIP TECHNOLOGIES LIMITED | Private company limited by shares | Dissolved |
| ATRIUM LIMITED | Private company limited by shares | Live |
| Atrium Asia Limited | Private company limited by shares | Live |
| Atrium Staffing Asia Limited | Private company limited by shares | Live |
| ASOK ATRIUM COMPANY LIMITED | | Live |
| ATRIUM CREATIVE CO., LIMITED | Private company limited by shares | Live |
| Atrium Corporation Limited | Private company limited by shares | Live |
| Atrium Medical Corporation Limited | Private company limited by shares | Dissolved |
| ATRIUM CREATION LIMITED | Private company limited by shares | Dissolved |
| Atrium Development Company Limited | Private company limited by shares | Live |
| ATRIUM DEVELOPMENTS LIMITED | Private company limited by shares | Dissolved |
| ATRIUM PRECISION ENGINEERING LIMITED | Private company limited by shares | Dissolved |
| GLOBAL ATRIUM LIMITED | Private company limited by shares | Dissolved |
| Atrium Engineering (HK) Inc. Limited | Private company limited by shares | Live |
| Atrium Innovations (HK) Limited | Private company limited by shares | Live |
| ATRIUM HOLDINGS LIMITED | Private company limited by shares | Dissolved |
| Atrium Health (Hong Kong) Inc. Limited | Private company limited by shares | Live |
| ATRIUM INFORMATION SYSTEMS (HK) LIMITED | Private company limited by shares | Dissolved |
| ATRIUM INTERNATIONAL COMPANY LIMITED | Private company limited by shares | Dissolved |
| ATRIUM INTERNATIONAL HOLDINGS LIMITED | Private company limited by shares | Dissolved |
| Atrium Investment Limited | Private company limited by shares | Dissolved |
| ATRIUM DESIGN & MARKETING COMPANY LIMITED | Private company limited by shares | Dissolved |
| MASTER ATRIUM LIMITED | Private company limited by shares | Dissolved |
| Atrium Construction material Limited | Private company limited by shares | Live |
| ATRIUM MEMBERSHIP SERVICES LIMITED | Private company limited by shares | Dissolved |
| SINO ATRIUM LIMITED | Private company limited by shares | Dissolved |
| ATRIUM STATION LIMITED | Private company limited by shares | Dissolved |
| ATRIUM TRADING LIMITED | Private company limited by shares | Dissolved |
| ATRIUM TRAVEL LIMITED | Private company limited by shares | Live |
| ATRIX LIMITED | Private company limited by shares | Live |
| ATRIX ELECTRONICS LIMITED | Private company limited by shares | Dissolved |
| ATRM (ASIA) LIMITED | Private company limited by shares | Live |
| ATROMO LIMITED | Private company limited by shares | Live |
| ATRON LIMITED | Private company limited by shares | Dissolved |
| ATRON LIMITED | | Live |
| ATRON CAPITAL ASIA LIMITED | Private company limited by shares | Dissolved |
| Atron Resources Limited | | Live |
| A-TRONIC COMPANY LIMITED | Private company limited by shares | Live |
| Atronics Limited | Private company limited by shares | Live |
| GENERAL ATRONICS CIRCUIT BOARD LIMITED | Private company limited by shares | Live |
| HONG KONG ATROPICAL SHOES CO., LIMITED | Private company limited by shares | Live |
| ATROPIN BIOTECH LIMITED | Private company limited by shares | Live Commenced dormancy on 09-Mar-2010 |
| ATROPINE LIMITED | Private company limited by shares | Dissolved |
| Atropos Limited | Private company limited by shares | Dissolved |