1. Albemarle Corporation
2. Arkema S.A.
3. Axens Group
4. BASF SE
5. CECO Environmental Corporation
6. Clariant AG
7. Evonik Industries AG
8. ExxonMobil Corporation
9. Fluor Corporation
10. Honeywell International Inc.
11. JGC C&C
12. Johnson Matthey PLC
13. KBR Inc.
14. Linde PLC
15. Magma Group
16. McDermott International
17. PJSC Lukoil Oil
18. RMS Engineering Inc.
19. Shell PLC
20. Sinopec
21. Stress Engineering Services Inc.
22. Sulzer Ltd.
23. Topsoe A/S
24. W. R. Grace & Co. by Standard Industries Holdings Inc.
25. Zeolyst International