- Chosun Refractories Co. Ltd
- Harbisonwalker International
- IFGL Refractories Ltd
- Imerys
- Krosaki Harima Corporation
- Magnezit Group
- Minerals Technologies Inc.
- Morgan Advanced Materials
- Refratechnik
- Resco Products Inc.
- RHI Magnesita GmbH
- Shinagawa Refractories Co. Ltd
- Vesuvius