?- 3M (Ceradyne Inc.)
- AGC Inc.
- Applied Ceramics Inc.
- Blasch Precision Ceramics Inc.
- Ceramtec
- COI Ceramics Inc.
- Coorstek Inc.
- Corning Incorporated
- International Ceramics Inc.
- Kyocera Corporation
- MARUWA Co. Ltd
- Materion Corporation
- McDanel Advanced Ceramic Technologies
- Morgan Advanced Materials
- Murata Manufacturing Co. Ltd
- Rauschert GmbH
- Saint-Gobain
- Small Precision Tools Inc.
- Vesuvius
- Wonik QnC Corporation