1. CeramTec TopCo GmbH
2. Dyson Technical Ceramics Limited
3. FIBRECAST INC.
4. Ibiden Co. Ltd.
5. ISOLITE INSULATING PRODUCTS CO. LTD.
6. Mitsubishi Chemical Corp.
7. MORGAN ADVANCED MATERIALS PLC
8. RHI Magnesita GmbH
9. The 3M Company
10. Unifrax Corporation