Schlumberger Limited (US)
Baker Hughes
a GE Company LLC (UK)
Ideal Energy Solutions
LLC (US)
Royal Dutch Shell PLC (The Netherlands)
BASF SE (Germany)
Solvay (Belgium)
Halliburton (US)
Clariant (US)
Kemira (Finland)
Albemarle Corporation (US)
Stepan Company (US)
Nalco Champion (US)
Croda International PLC (UK)
Huntsman International LLC (US)
Ashland (US)
and The Lubrizol Corporation (US)