| 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 |
| Atropos Limited | | Live |
| Atropos Shipping Co., Limited | | Live |
| Atrs Guanglong Trading Limited | Private company limited by shares | Live |
| A_true Electronics CO., Limited | Private company limited by shares | Live |
| ATRX ELECTRIC CO., LIMITED | | Live |
| A-TRY TELECOMMUNICATIONS CO., LIMITED | Private company limited by shares | Live |
| A.T.S. ENTERPRISES LIMITED | Private company limited by shares | Dissolved |
| A.T.S. PRIVATE LIMITED | Private company limited by shares | Dissolved |
| ATSA LIMITED | Private company limited by shares | Dissolved |
| ATS-BETTER LIMITED | Private company limited by shares | Live |
| ATSCO ASSISTANCE TRADING COMPANY LIMITED | Private company limited by shares | Dissolved |
| ATS-Consultancy Co., Limited | Private company limited by shares | Dissolved |
| ATSELECTRO LIMITED | Private company limited by shares | Live |
| ATSG East Leasing Limited | Private company limited by shares | Live |
| HONG KONG ATSG SHIPPING AGENCY LIMITED | Private company limited by shares | Live |
| A.T.S.H. Limited | Private company limited by shares | Live |
| ATSKINGDOWS CO., LIMITED | Private company limited by shares | Live |
| ATSL Company Limited | Private company limited by shares | Live |
| ATSL Service Limited | Private company limited by shares | Live |
| Atslash Limited | Private company limited by shares | Live |
| Chico's ATSO Limited | Private company limited by shares | Live |
| AT-SOLUTION MANAGEMENT LIMITED | Private company limited by shares | Dissolved |
| MARINE ATSOURCE (HK) LIMITED | Private company limited by shares | Dissolved |
| ATSOURCE SOLUTIONS LIMITED | Private company limited by shares | Dissolved |
| ATSPID LIMITED | | Live |
| ATSPIN LIMITED | Private company limited by shares | Live |
| ATSTOCK LIMITED | Private company limited by shares | Live |
| ATSU ENTERPRISE LIMITED | Private company limited by shares | Live |
| ATSUGI HONG KONG LIMITED | Private company limited by shares | Live |
| ATSUKO COMPANY LIMITED | Private company limited by shares | Dissolved |
| Atsumi Limited | Private company limited by shares | Live |
| ATSUNORI (HONG KONG) LIMITED | Private company limited by shares | Dissolved |
| ATSUYUKI TRADING LIMITED | Private company limited by shares | Live |
| ATSWANA LIMITED | Private company limited by shares | Dissolved |
| Atszrael Limited | | Live |
| ANTICA (ATT) CAFFE COMPANY LIMITED | Private company limited by shares | Dissolved |
| ATTA LIMITED | Private company limited by shares | Dissolved |
| ATTA LIMITED -THE- | Private company limited by shares | Live |
| Atta Capital Limited | Private company limited by shares | Live |
| ATTA Enterprise Limited | | Live |
| ATTA ENTERPRISES LIMITED | Private company limited by shares | Dissolved |
| ATTA ENTERPRISES LIMITED | Private company limited by shares | Live |
| ATTA PACK CO. LIMITED | Private company limited by shares | Live |
| ATTAB GSE (HONGKONG) LIMITED | Private company limited by shares | Dissolved |
| ATTABOY COMPANY LIMITED | Private company limited by shares | Dissolved |
| Jat Attac (HK) Company Limited | Private company limited by shares | Live |
| ATTACCA COMPANY LIMITED | Private company limited by shares | Live |
| Attacca Innovation Co. Limited | Private company limited by shares | Live |
| Attacca Projects Limited | Private company limited by shares | Live |