| BLACKSTONE TECHNOLOGY INVESTMENT LIMITED | Private company limited by shares | Live |
| Blackstoof Company Limited | Private company limited by shares | Live |
| Blackstorm Company Limited | Private company limited by shares | Live |
| BLACK.sugar Fashion Limited | | Live |
| HONG KONG BLACKSUN ENTERTAINMENT LIMITED | Private company limited by shares | Live |
| BlackSun International Limited | Private company limited by shares | Live |
| Blacksync Limited | | Live |
| Blacktail (Hong Kong) Limited | Private company limited by shares | Live |
| CHINA KEEMUN BLACKTEA GROUP CO., LIMITED | Private company limited by shares | Dissolved |
| BlackTea Hong Kong Limited | | Live |
| BLACKTEA TECHNOLOGY LIMITED | Private company limited by shares | Live |
| QMIS RICHWOOD BLACKTECH LIMITED | | Live |
| Blacktek.io Limited | | Live |
| BLACKTEX LIMITED | Private company limited by shares | Live |
| Blackthorn Capital Limited | Private company limited by shares | Live |
| BLACKTHORN ELECTRONIC LIMITED | Private company limited by shares | Live |
| BLACKTHORN FINANCE LIMITED | Private company limited by shares | Live |
| Blackthorne Limited | | Live |
| BLACKTON DEVELOPMENTS LIMITED | Private company limited by shares | Dissolved |
| Blacktop Limited | Private company limited by shares | Live |
| BLACKVAULT LIMITED | Private company limited by shares | Live |
| BlackVolt Capital Limited | | Live |
| BlackVPN Limited | Private company limited by shares | Live |
| Blackwall Limited | Private company limited by shares | Live |
| Blackwatch Resources (Asia) Limited | Private company limited by shares | Dissolved |
| BLACKWATER LIMITED | Private company limited by shares | Dissolved |
| Blackwater Company Limited | Private company limited by shares | Live |
| Blackwater Solutions Limited | | Live |
| Blackwave Limited | | Live |
| BLACKWELL LIMITED | Private company limited by shares | Dissolved |
| Blackwell Consulting Limited | Private company limited by shares | Live |
| Blackwell Global Forex Limited | Private company limited by shares | Live |
| Blackwell Global Capital Limited | Private company limited by shares | Live |
| Blackwell Global Entertainment Limited | Private company limited by shares | Live |
| Blackwell Global Futures Limited | Private company limited by shares | Live |
| BLACKWELL GROUP LIMITED | Private company limited by shares | Dissolved |
| BLACKWELL CAPITAL GROUP LIMITED | Private company limited by shares | Dissolved |
| Blackwell Global Investments (HK) Limited | Private company limited by shares | Live |
| BLACKWELL PUBLISHING (HK) LIMITED | Private company limited by shares | Live |
| BLACKWELL YOUNG (HONG KONG) LIMITED | Private company limited by shares | Dissolved |
| JOHN R. BLACKWELL LIMITED | Private company limited by shares | Dissolved |
| Blackwell Capital Management Limited | Private company limited by shares | Live |
| Blackwell Global Asset Management Limited | Private company limited by shares | Live |
| Blackwell Digital Media Limited | Private company limited by shares | Live |
| Blackwell Global Mining Limited | Private company limited by shares | Live |
| Blackwell Global Precious Metals Limited | Private company limited by shares | Live |
| Blackwell Global Securities Limited | Private company limited by shares | Live |
| Blackwell Dragonway Trading Limited | | Live |
| BlackWhale Entertainment Limited | | Live |
| Blackwolf Technology (HK) Limited | Private company limited by shares | Live |
| BLACKWOOD LIMITED | Private company limited by shares | Dissolved |
| BLACKWOOD INC LIMITED | Private company limited by shares | Live |
| Blackwood Limited | Private company limited by shares | Live |
| BLACKWOODCONSULTING LIMITED | Private company limited by shares | Live |
| blackx Assets Limited | | Live |
| BlackxWood Limited | Private company limited by shares | Live |
| Monya & Blacky Limited | Private company limited by shares | Live |
| BLACKZOO LIMITED | Private company limited by shares | Live |