| A.T.O. CONSTRUCTION COMPANY LIMITED | Private company limited by shares | Dissolved |
| HONG KONG ATOB COMPANY LIMITED | Private company limited by shares | Live |
| ATOCHA ALTERNATIVES, LIMITED | Private company limited by shares | Dissolved |
| Atochem Limited | | Live |
| ATOCNAIL INDUSTRY CO., LIMITED | Private company limited by shares | Live |
| ATOFINA FAR EAST LIMITED | Private company limited by shares | Dissolved |
| FRANCH ATOFINA PETROLEUM GROUP LIMITED | Private company limited by shares | Dissolved |
| ATOIR LIMITED | Private company limited by shares | Live |
| Atok Hong Kong Company Limited | Private company limited by shares | Live |
| ATOKA LIMITED | Private company limited by shares | Dissolved |
| Atokenn Limited | | Live |
| ATOLITE TECHNOLOGY LIMITED | Private company limited by shares | Live |
| ATOLL COMPANY LIMITED | Private company limited by shares | Dissolved |
| ATOLL 11 LIMITED | Private company limited by shares | Dissolved |
| ROCK ATOLL, LIMITED | Private company limited by shares | Live |
| ATOLUS LIMITED | Private company limited by shares | Dissolved |
| ATOM LIMITED | Private company limited by shares | Live |
| ATOM HK CO. LIMITED | Private company limited by shares | Dissolved |
| ATOM 8 LIMITED | Private company limited by shares | Live |
| Atom Bro Limited | Private company limited by shares | Live |
| Big Atom Limited | | Live |
| FIRST ATOM LIMITED | Private company limited by shares | Live |
| Atomade Limited | Private company limited by shares | Live |
| atomata Limited | Private company limited by shares | Live |
| ATOMATIC COMPANY LIMITED | Private company limited by shares | Dissolved |
| Atomatic Limited | | Live |
| ATOMBABY LIMITED | Private company limited by shares | Live |
| ATOMBASE LIMITED | Private company limited by shares | Dissolved |
| Atome HK Limited | Private company limited by shares | Live |
| ATOME TRADING AGENT LIMITED | Private company limited by shares | Dissolved |
| ATOMENTAL CAPITAL (HONG KONG) CO., LIMITED | Private company limited by shares | Live |
| Atomess System Technology Co., Limited | | Live |
| Atomhash Limited | | Live |
| ATOMIC LIMITED | Private company limited by shares | Dissolved |
| ATOMIC LIMITED | Private company limited by shares | Live |
| Atomic E Limited | Private company limited by shares | Live |
| ATOMIC ADVERTISING LIMITED | Private company limited by shares | Live |
| ATOMIC BLENDER LIMITED | Private company limited by shares | Live |
| ATOMIC CAPITAL LIMITED | Private company limited by shares | Dissolved |
| Atomic Capital Limited | Private company limited by shares | Live |
| Atomic Factors Limited | | Live |
| ATOMIC GOLD LIMITED | Private company limited by shares | Live |
| Atomic Innovation Limited | Private company limited by shares | Live |
| ATOMIC INTERACTIONS LIMITED | Private company limited by shares | Dissolved |
| ATOMIC INVESTMENT LIMITED | Private company limited by shares | Live |
| ATOMIC SPORTS LIMITED | Private company limited by shares | Dissolved |
| ATOMIC STREAM LIMITED | Private company limited by shares | Live |
| AtomicAdd Co., Limited | Private company limited by shares | Live |
| ATOMICALL Limited | Private company limited by shares | Live |
| ATOMICLIGHT CO., LIMITED | Private company limited by shares | Live |
| AtomicNexus Limited | Private company limited by shares | Live |
| ATOMIK F&B LIMITED | Private company limited by shares | Live |
| ATOMIK CAPITAL LIMITED | Private company limited by shares | Live |
| ATOMITAD LIMITED | Private company limited by shares | Live |
| AtomJam Entertainment Limited | Private company limited by shares | Dissolved |
| Atomlantis Network Co, Limited | | Live |
| ATOMLUX SYSTEMS (HK) LIMITED | Private company limited by shares | Dissolved |
| Atomo Limited | Private company limited by shares | Live |
| ATOMOLE SCIENTIFIC CO., LIMITED | Private company limited by shares | Live |
| ATOMOS LIMITED | Private company limited by shares | Live |
| ATOMS LIMITED | Private company limited by shares | Live |
| ATOMSTACK INDUSTRIES (HONG KONG) LIMITED | | Live |
| AtomStack Technologies (Hong Kong) Co. , Limited | | Live |
| Atomsun International Proprietary Limited | Private company limited by shares | Live |
| ATOMU Global Co., Limited | Private company limited by shares | Dissolved |
| Atomu (Hong Kong) Co., Limited | Private company limited by shares | Live |
| AtomVest Limited | Private company limited by shares | Live |
| AtomX Limited | Private company limited by shares | Live |
| ATON LIMITED | Private company limited by shares | Live |
| ATON ASSETS ASIA LIMITED | Private company limited by shares | Live |
| ATON HOLDING LIMITED | Private company limited by shares | Live |
| ATON INVESTMENT LIMITED | Private company limited by shares | Dissolved |
| Aton Mortgage Limited | Private company limited by shares | Live |
| AT-one Limited | Private company limited by shares | Live |
| ATONE NEW ENERGY LIMITED | Private company limited by shares | Live |
| AT-ONE (HONG KONG) LIMITED | Private company limited by shares | Live |
| ATONE LIGHTING INTERNATIONAL LIMITED | Private company limited by shares | Live |
| Atoner Limited | | Live |
| Atonerstore Company Limited | | Live |
| ATONG TECHNOLOGY LIMITED | | Live |
| ATONI ESTATE LIMITED | Private company limited by shares | Live |
| Atonney Lighting Company Limited | Private company limited by shares | Live |
| ATONNIC LIMITED | Private company limited by shares | Dissolved |
| Atontech (Hong Kong) Co., Limited | Private company limited by shares | Live |
| ATOOL LIMITED | Private company limited by shares | Live |
| ATOOLIE LIMITED | Private company limited by shares | Dissolved |
| ATOOLY LIMITED | Private company limited by shares | Live |
| ATOP COMPANY LIMITED | Private company limited by shares | Live |
| BIG ATOP LIMITED | Private company limited by shares | Dissolved |
| Atop one Limited | | Live |
| Atop Aesthetic Limited | | Live |
| A-TOP ELECTRONICS CO., LIMITED | Private company limited by shares | Dissolved |
| A-TOP Electronics CO., Limited | Private company limited by shares | Live |
| Atop Dongguan Electronics Co., Limited | Private company limited by shares | Live |
| ATOP TENT CO., LIMITED | Private company limited by shares | Live |
| ATOP TRADE CO., LIMITED | Private company limited by shares | Live |
| ATOP DECO LIMITED | Private company limited by shares | Live |
| ATOP DECOR LIMITED | Private company limited by shares | Dissolved |
| ATOP INNOVATION ENTERPRISE LIMITED | Private company limited by shares | Live |
| A-TOP ENTERPRISES LIMITED | Private company limited by shares | Dissolved |