| AT&M SUPPLY CO., LIMITED | Private company limited by shares | Live |
| ATMA LIMITED | Private company limited by shares | Live |
| ATMA LIMITED | Private company limited by shares | Live |
| Atma Collection Limited | Private company limited by shares | Live |
| ATMAN ELECTRONICS LIMITED | Private company limited by shares | Live |
| ATMAN TECHNOLOGY (HONG KONG) LIMITED | Private company limited by shares | Live |
| Atman Intelligence Hongkong Co. Limited | Private company limited by shares | Live |
| ATMAN (INTERNATION) LIMITED | Private company limited by shares | Live |
| ATMANAS LIMITED | Private company limited by shares | Dissolved |
| AT-MATERIAL LIMITED | Private company limited by shares | Live |
| ATMCLOUD LIMITED | Private company limited by shares | Live |
| ATMD Limited | Private company limited by shares | Live |
| ATMD (Hong Kong) Limited | Private company limited by shares | Live |
| ATMD OPTIC LIMITED | Private company limited by shares | Live |
| ATME LIMITED | Private company limited by shares | Live |
| HK Atme Trading Co., Limited | Private company limited by shares | Live |
| ATMEDICA PACIFIC LIMITED | Private company limited by shares | Dissolved |
| ATMEL-WM HONG KONG LIMITED | Private company limited by shares | Dissolved |
| Atmesfer Limited | Private company limited by shares | Live |
| Atmex Technology Limited | Private company limited by shares | Live |
| ATM-Group Limited | Private company limited by shares | Dissolved |
| ATMHKC Limited | Private company limited by shares | Dissolved |
| ATML Healthspan Limited | | Live |
| ATMO GROUP LIMITED | Private company limited by shares | Dissolved |
| ATMO GROUP LIMITED | Private company limited by shares | Live |
| ATMOS LIMITED | Private company limited by shares | Live |
| ATMOS FURNITURE COMPANY LIMITED | | Live |
| atmos Holding Limited | Private company limited by shares | Live |
| AtmosAir Asia Limited | Private company limited by shares | Live |
| Atmosphere Co., Limited | Private company limited by shares | Live |
| Dense And Hevy Atmosphere Global Investment Company Limited | Private company limited by shares | Live |
| PROSPEROUS ATMOSPHERE LIMITED | Private company limited by shares | Live |
| ATMOSPHERE WORKSHOP LIMITED | Private company limited by shares | Live |
| Japan Yalaishi Atmosphere Cleaning Equipment Kabu Limited | Private company limited by shares | Live |
| Atmospheres Limited | Private company limited by shares | Live |
| WUXI KANGNING ELECTRICAL APPARATUS FOR EXPLOSIVE ATMOSPHERES CO., LIMITED | Private company limited by shares | Live |
| Global Standard Laboratory of Atmospheric Physics Co., Limited | Private company limited by shares | Live |
| AT-motion Limited | Private company limited by shares | Live |
| Atmoz Watch Limited | Private company limited by shares | Live |
| ATMT CHINA LIMITED | Private company limited by shares | Dissolved |
| ATMT DIRECT LIMITED | Private company limited by shares | Dissolved |