- Carmeuse
- Graymont Limited
- Lhoist
- Mississippi Lime
- Minerals Technologies Inc.
- CAO Industries Sdn Bhd
- AKJ Minchem Private Limited
- Astrra Chemicals
- Sigma Minerals Ltd
- Sibelco
- American Elements
- Graymont Limited
- Carmeuse
- American Elements
- CAO Industries Sdn Bhd
- Mississippi Lime