1. ALBEMARLE CORP.
2. AKZO NOBEL N.V.
3. BAKER HUGHES
4. BASF SE
5. CLARIANT
6. CRODA INTERNATIONAL PLC
7. DOW CHEMICAL COMPANY
8. ECOLAB INC.
9. HALLIBURTON COMPANY
10. LUBRIZOL CORPORATION
11. NALCO COMPANY LLC
12. NEWPARK RESOURCES Inc.
13. SCHLUMBERGER LIMITED
14. SOLVAY S.A.
15. STEPAN COMPANY