| MARKHAM LIMITED | Private company limited by shares | Dissolved |
| Markham Limited | Private company limited by shares | Live |
| MARKHAM INVESTMENT LIMITED | Private company limited by shares | Dissolved |
| MARKHAM PUBLISHING LIMITED | Private company limited by shares | Live |
| MARKHAM RESOURCES LIMITED | Private company limited by shares | Live |
| MARKHAM SOLUTIONS LIMITED | Private company limited by shares | Dissolved |
| MARKHAM-BRYDGES LIMITED | Private company limited by shares | Dissolved |
| MARKHAM-HONGKONG LIMITED | Private company limited by shares | Dissolved |