| Boomt Industrial Co., Limited | Private company limited by shares | Live |
| Boom-Taking Off Group Limited | Private company limited by shares | Live |
| BoomTech Company Limited | Private company limited by shares | Live |
| BOOMTECH INTERNATIONAL (H.K.) LIMITED | Private company limited by shares | Dissolved |
| BOOM-TECH (HONG KONG) CO., LIMITED | Private company limited by shares | Dissolved |
| BOOMTECH PRECISION MACHINING LIMITED | Private company limited by shares | Dissolved |
| Boomtek Limited | Private company limited by shares | Live |
| BOOMTEM INDUSTRIAL LIMITED | Private company limited by shares | Live |
| BOOMTEX LIMITED | Private company limited by shares | Dissolved |
| BOOMTIMES LIMITED | Private company limited by shares | Live |
| BOOMTOWN INVESTMENT LIMITED | Private company limited by shares | Dissolved |
| BOOMTRADE COMPANY LIMITED | Private company limited by shares | Dissolved |