1. AERINOX
2. BASF
3. CLEAN DISESEL TECHNOLOGIES
4. CLARIANT AG
5. CORMETEC
6. CORNING INCORPORATED
7. DCL INTERNATIONAL INC.
8. JOHNSON MATTHEY
9. TENNECO INC.
10. UMICORE
11. BABCOCK & WILCOX ENTERPRISES
12. CECO ENVIORNMENTAL
13. HAMON
14. THERMAX LTD
15. GENERAL ELECTRIC COMPANY