1. Advanced Emissions Solutions Inc.
2. Albemarle Corporation
3. Boyce Carbon
4. Cabot Corporation
5. Carbon Activated Corporation
6. Carbotech Ac GmbH
7. CPL Activated Carbons
8. Desotec
9. Evoqua Water Technologies LLC
10. HAYCARB (PVT) LTD
11. Ingevity Corporation
12. Karbonous Inc.
13. Kuraray Co. Ltd.
14. Kureha Corporation
15. Osaka Gas Co. LTD.
16. Puragen Activated Carbons
17. Silcarbon Aktivkohle GmBH
18. Veolia Water Technologies