1. BASF SE
2. Beltran Technologies Inc.
3. Benetech Inc.
4. Borregaard AS
5. Camfil AB
6. Cargill
Incorporated
7. CDC Dust Control Pty (Ltd).
8. Donaldson Company Inc.
9. Dust Control Technologies Inc.
10. Duztech AB
11. Ecolab Inc.
12. Hexion Inc.
13. Nederman Holding AB
14. Quaker Chemical Corporation
15. Savic Group