| Bucha Limited | | Live |
| BUCHA TRADE COMPANY LIMITED | Private company limited by shares | Live |
| Buchai Limited | Private company limited by shares | Live |
| BUCHAN INTERNATIONAL LIMITED | Private company limited by shares | Dissolved |
| DAVID K. BUCHANAN & ASSOCIATES LIMITED | Private company limited by shares | Dissolved |
| Buchanan Capital Limited | Private company limited by shares | Live |
| BUCHANAN CAPITAL ONE LIMITED | Private company limited by shares | Live |
| NEIL BUCHANAN LIMITED | Private company limited by shares | Dissolved |
| BUCHANEN COMPANY LIMITED | Private company limited by shares | Dissolved |
| Germany Munich Bucharest Lydia Beer Limited | Private company limited by shares | Live |
| BUCHAYA LIMITED | Private company limited by shares | Live |
| Buchen Limited | | Live |
| A. P. BUCHER CONSULTANCY LIMITED | Private company limited by shares | Dissolved |
| BUCHERER HONG KONG LIMITED | Private company limited by shares | Live |
| UNITED BUCHERRE INTERNATIONAL LIMITED | Private company limited by shares | Live |
| BUCHERSILLE LIMITED | Private company limited by shares | Dissolved |
| Buchi-Uster Hong Kong Limited | Private company limited by shares | Live |
| Buchman Limited | Private company limited by shares | Live |
| BUCHUANG GROUP CO., LIMITED | Private company limited by shares | Live |