1. Biffa PLC
2. Clean Harbors Inc.
3. Covanta Holding Corporation
4. Daiseki Co. Ltd.
5. EnviroServ Waste Management (PTY) Ltd.
6. M? Polymer Technologies Inc.
7. Reclay Holding GmbH
8. REMONDIS SE & Co. KG
9. Republic Services Inc.
10. SA Waste (PTY) Ltd.
11. Sembcorp Industries Ltd
12. Stericycle Inc.
13. SUEZ
14. Veolia Environnement SA
15. Waste Management Inc.