| COVAN LIMITED | Private company limited by shares | Dissolved |
| COVAN LIMITED | Private company limited by shares | Live |
| COVAN LIMITED | Private company limited by shares | Live |
| COVANDA INVESTMENTS LIMITED | Private company limited by shares | Dissolved |
| COVANLI PROPERTIES LIMITED | Private company limited by shares | Dissolved |
| COVANLY INVESTMENT LIMITED | Private company limited by shares | Dissolved |
| Covanm Grounp Limited | Private company limited by shares | Live |
| Covanna Co., Limited | Private company limited by shares | Live |
| COVANT TREE LIMITED | Private company limited by shares | Dissolved |
| COVANTA INVESTMENT LIMITED | Private company limited by shares | Live |