1. Albemarle Corporation
2. Baker Hughes Company
3. Carousel Specialty Products Inc.
4. Chemcon Speciality Chemicals Pvt. Ltd.
5. Clements Fluids
6. GEO Drilling Fluids Inc.
7. Halliburton Energy Services Inc.
8. Israel Chemicals Ltd.
9. LANXESS AG
10. Newpark Resources Inc.
11. Schlumberger Limited
12. Sinomine Specialty Fluids
13. Solent Chemicals
14. TETRA Technologies
Inc
15. Zirax