| SCHOOLMATE LIMITED | Private company limited by shares | Dissolved |
| SCHOOLMATE E-PUBLISH LIMITED | Private company limited by shares | Dissolved |
| Secondary Schoolmate Investment Company Limited | Private company limited by shares | Live |
| SHI GUANG SCHOOLMATES (H.K.) ASSOCIATION LIMITED | Company limited by guarantee | Live |
| HAN ZHONG SCHOOLMATES HONG KONG, MACAU & TAIWAN ASSOCIATION LIMITED | Company limited by guarantee | Live |
| FUJIAN QUANZHOU 7TH MIDDLE (HUI MING) SCHOOLMATES ASSOCIATION LIMITED | Private company limited by shares | Live |
| AMOY DOUBLE 10 SECONDARY SCHOOL OLD SCHOOLMATES' ASSOCIATION (H.K.) LIMITED | Company limited by guarantee | Live |
| SCHOOLMATES.CC LIMITED | Private company limited by shares | Live |