| 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 |