| SERO DIAGNOSTICS LIMITED | Private company limited by shares | Dissolved |
| HE SERO ENTERPRISE LIMITED | Private company limited by shares | Dissolved |
| SERO HOLDING LIMITED | Private company limited by shares | Dissolved |
| HONG KONG "SERO SERO" MUSLIM RESTAURANT LIMITED | Private company limited by shares | Dissolved |
| SERO HOUSEHOLD APPLIANCES GROUP (INTERNATIONAL) COMPANY LIMITED | Private company limited by shares | Dissolved |
| SERO INDUSTRIAL & COMMERCIAL LIMITED | Private company limited by shares | Dissolved |
| SERO MARKETING LIMITED | Private company limited by shares | Dissolved |
| SEROBORN COMPANY LIMITED | Private company limited by shares | Dissolved |
| SEROES LIMITED | Private company limited by shares | Live |
| SEROK DESIGN LIMITED | Private company limited by shares | Live |
| SEROLD ASSOCIATES LIMITED | Private company limited by shares | Dissolved |
| Serologicals Hong Kong Limited | Private company limited by shares | Dissolved |
| Serolu Limited | | Live |
| SERON LIMITED | Private company limited by shares | Dissolved |
| SERON INVESTMENT LIMITED | Private company limited by shares | Dissolved |
| SERON SERVICE LIMITED | Private company limited by shares | Live |
| SERONERA LIMITED | Private company limited by shares | Dissolved |
| SERONERA TRADING COMPANY LIMITED | Private company limited by shares | Live |
| Seronin Company Limited | | Live |
| SERONO HONG KONG LIMITED | Private company limited by shares | Dissolved |
| SEROPH APAC LIMITED | Private company limited by shares | Live |
| SEROR LIMITED | Private company limited by shares | Dissolved |
| Seros Technologies Limited | | Live |
| Serotonin Co Limited | Private company limited by shares | Live |
| SEROTONIN OUTDOORS CO., LIMITED | | Live |
| SEROTRADE LIMITED | Private company limited by shares | Dissolved |
| SEROTROPIN LIMITED | Private company limited by shares | Live Commenced dormancy on 09-Mar-2010 |
| SEROYAL TRADE LIMITED | Private company limited by shares | Live |