Waste Management Inc.
Covanta Holding Corporation
Waste Connections Inc
Seche Environnement SA
ALBA SE
Fomento de Construcciones y Contratas S.A.
RETHMANN SE & Co KG
Daiseki Co Ltd
Takuma Co Ltd
Fujikoh Company. Ltd
RT Invest
Biffa Plc
Veolia Environnement S.A.
Clean Harbors Inc
Stericycle Inc.
Republic Services Inc.