• Petro China Company Limited (China National Petroleum Corporation)
• Sinopec Group (China Petrochemical Corporation)
• Sasol Limited
• Exxon Mobil Corporation
• (Petrobras) Petr?leo Brasileiro S.A
• Nippon Seiro Co. Ltd.
• H&R Gmbh & Co. KGaA
• Honeywell International Inc.
• Cepsa (COMPA??A ESPA?OLA DE PETR?LEOS
S.A.)