Arch Chemicals,Inc.
Arco
Atofina
Basell
BASF
Bayer
BP
Chevron Phillips
Chevron
Citgo
Conoco
Crown Petroleum
Cytec
Entergy
Dupont
Equistar
Ethyl
ExxonMobil
Georgia Gulf
Goodyear Chemical
Celanese
Huntsman
Husky Energy
Ineos
Koch Petroleum
Lyondell
Marathon Oil
Marichem
Mobil
Motiva
Murphy Oil
Nova Chemical
OxyChem
Petro-Canada
Phillips
Placid Refining
PPG Industries
Premcor Refining Group
Rohm and Haas
Shell Oil
Solvay
Sterling Chemicals
Tesoro
Unocal Refining
Valero Energy Corporation