1. Casella Waste Management Inc.
2. Clean Harbors Inc.
3. Covanta Holding Corporation
4. FCC Environment (UK) Ltd.
5. Kitro S.A.
6. OLIO Exchange Limited
7. Remondis SE & Co. KG
8. Republic Services Inc.
9. Stericycle Inc.
10. Syker Systems
11. Veolia Environnement S.A.
12. Waste Connections Inc.
13. WM Intellectual Property Holdings
L.L.C.