| Brainfood Limited | Private company limited by shares | Live |
| BRAINFORCE LIMITED | Private company limited by shares | Dissolved |
| BRAINFORD LIMITED | Private company limited by shares | Live |
| BRAINFREE LIMITED | Private company limited by shares | Dissolved |
| BRAINFUEL LANGUAGE EDUCATION LIMITED | Private company limited by shares | Live |
| BRAINGO PAYMENT SOLUTION LIMITED | Private company limited by shares | Live |
| Brainhause Holdings (Hong Kong) Limited | Private company limited by shares | Dissolved |
| Brainhole Technology Limited | Private company limited by shares | Live |
| Brainhole Technology Investments Limited | Private company limited by shares | Live |
| BRAINHUB LIMITED | Private company limited by shares | Live |
| BRAINIAC EDUCATION LIMITED | Private company limited by shares | Live |
| BRAINIAC (HK) INDUSTRIAL CO., LIMITED | Private company limited by shares | Live |
| BRAINIAKS (HONG KONG) LIMITED | Private company limited by shares | Dissolved |
| Brainify Tech Limited | Private company limited by shares | Live |
| BRAININTERACTIVE CO., LIMITED | Private company limited by shares | Live |
| BrainKey Education Limited | Private company limited by shares | Live |
| BRAINKID DEVELOPMENT LIMITED | Private company limited by shares | Dissolved |
| BRAINLAB LIMITED | Private company limited by shares | Live |
| BRAIN-LEO INVESTMENT LIMITED | Private company limited by shares | Dissolved |
| BRAINMAN LIMITED | Private company limited by shares | Live |
| Brainman Technology Finance Group Limited | Private company limited by shares | Live |
| Brainmaps Holdings Limited | Private company limited by shares | Live |
| BRAINMAX LIMITED | Private company limited by shares | Live Commenced dormancy on 04-Jun-2015 |
| BrainMod Limited | | Live |
| Brainovative (APAC) Limited | Private company limited by shares | Live |
| Brainpage Limited | Private company limited by shares | Live |
| BRAINPHARM LIMITED | Private company limited by shares | Live |
| BRAINPLUS LIMITED | Private company limited by shares | Dissolved |
| Brainpool Limited | Private company limited by shares | Dissolved |
| BRAINPORT LIMITED | Private company limited by shares | Live |
| BRAINPOWER COMPANY LIMITED | Private company limited by shares | Live |
| BRAINPOWER ASIA LIMITED | Private company limited by shares | Dissolved |
| BRAINPOWER (ASIA) LIMITED | Private company limited by shares | Live |
| BrainPower & Memory Association Limited | | Live |
| Brainpower Investment Limited | Private company limited by shares | Live |
| BRAINPOWER SOLUTIONS LIMITED | Private company limited by shares | Live |
| BRAINPOWER TEAM COMPANY LIMITED | Private company limited by shares | Dissolved |
| BrainReCreate Company Limited | Company limited by guarantee | Live |
| BRAINRENTAL LIMITED | Private company limited by shares | Live |
| ALL BRAINS COMPANY LIMITED | Private company limited by shares | Dissolved |
| BIG BRAINS LIMITED | Private company limited by shares | Live |
| BRAINS LIMITED | Private company limited by shares | Live |
| BRAINS CPA LIMITED | Private company limited by shares | Live |
| Oh My Brains Limited | Private company limited by shares | Live |
| IT BRAINS LIMITED | | Live |
| BRAINS ASIA LIMITED | Private company limited by shares | Dissolved |
| Asset Brains HK Limited | Private company limited by shares | Live |
| COMMERCIAL BRAINS LIMITED | Private company limited by shares | Dissolved |
| TU BRAINS CONSULTANCY LIMITED | Private company limited by shares | Live |
| Brains on the Beach Consulting Limited | Private company limited by shares | Live |
| BRAINS DECORATOR (H.K.) LIMITED | Private company limited by shares | Dissolved |
| BRAINS DESIGNER & DECORATOR LIMITED | Private company limited by shares | Live |
| GLOBAL BRAINS CO., LIMITED | Private company limited by shares | Dissolved |
| GLORY BRAINS LIMITED | Private company limited by shares | Dissolved |
| Brains Media Group Limited | Private company limited by shares | Live |
| HAMMER & BRAINS LIMITED | Private company limited by shares | Live |
| IC Brains Hong Kong Limited | Private company limited by shares | Dissolved |
| BRAINS INTERNATIONAL HONG KONG LIMITED | Private company limited by shares | Dissolved |
| BRAINS OCEAN (HONG KONG) LIMITED | Private company limited by shares | Live |
| UNITED BRAINS (HONG KONG) LIMITED | Private company limited by shares | Dissolved |
| MAXI BRAINS PUBLISHING LIMITED | Private company limited by shares | Live |
| Brains Media Company Limited | Private company limited by shares | Dissolved |
| MIGHTY BRAINS INTERNATIONAL CO., LIMITED | Private company limited by shares | Live |
| SPACE & BRAINS CO. LIMITED | Private company limited by shares | Dissolved |
| THOUSAND BRAINS LIMITED | Private company limited by shares | Dissolved |
| BRAINS UP TOYS LIMITED | | Live |
| TREASURE BRAINS LIMITED | Private company limited by shares | Dissolved |
| J. WISE & BRAINS ( H.K. ) LIMITED | Private company limited by shares | Dissolved |
| BRAINSCANS LIMITED | Private company limited by shares | Dissolved |
| BRAINSCI TECHNOLOGY LIMITED | | Live |
| Brainsea Consulting (HongKong) Co., Limited | Private company limited by shares | Dissolved |
| Brainsfeed Limited | Private company limited by shares | Live |
| BRAINSOM COMPANY LIMITED | Private company limited by shares | Dissolved |
| BRAINSOM INVESTMENT LIMITED | Private company limited by shares | Dissolved |
| BRAINSON LIMITED | Private company limited by shares | Dissolved |
| BRAINSON ENTERPRISES LIMITED | Private company limited by shares | Dissolved |
| BRAINSON (H.K.) LIMITED | Private company limited by shares | Dissolved |
| BRAINSON INTERNATIONAL LIMITED | Private company limited by shares | Dissolved |
| BRAINSON INVESTMENT LIMITED | Private company limited by shares | Live |
| BRAINSON TRADING COMPANY LIMITED | Private company limited by shares | Dissolved |
| Brainsquad Limited | Private company limited by shares | Live |
| Brainstones Hong Kong Company Limited | Private company limited by shares | Live |
| Brainstones Indochina Limited | Private company limited by shares | Live |
| Brainstones Vietnam Holding Limited | Private company limited by shares | Live |
| Brainstore Limited | | Live |
| BRAINSTORM COMPANY LIMITED | Private company limited by shares | Dissolved |
| BRAINSTORM COMPANY LIMITED | Private company limited by shares | Live |
| Brainstorm Architecture Limited | Private company limited by shares | Dissolved |
| BRAINSTORM SUPPLY CHAIN COMPANY LIMITED | | Live |
| Brainstorm Consultancy Limited | Private company limited by shares | Live |
| BRAINSTORM DIGITAL COMPANY LIMITED | Private company limited by shares | Live |
| BRAINSTORM TRADE CO. LIMITED | Private company limited by shares | Live |
| AT WEALTHY BRAINSTORM LIMITED | Private company limited by shares | Live |
| BRAINSTORMER LAB LIMITED | Private company limited by shares | Live |
| BRAINSTORMER LAN LIMITED | Private company limited by shares | Live |
| BRAINSTORMERS LIMITED -THE- | Private company limited by shares | Live |
| BRAINSTORMERS GROUP LIMITED -THE- | Private company limited by shares | Live |
| BrainStormHK Limited | Private company limited by shares | Live |
| Brainstorming Limited | Private company limited by shares | Live |
| Brainstorming Entertainment Limited | Private company limited by shares | Live |