Evonik Industries AG (Germany)
Dow Corning Corporation (US)
Momentive Performance Materials Inc. (US)
Wacker Chemie AG (Germany)
Innospec Inc. (US)
Shin-Etsu Chemical Co. Ltd. (Japan)
Siltech Corporation (Canada)
El? Corporation (US)
Elkem ASA (France)
Supreme Silicones (India)