OMYA AG (Switzerland)
Imerys Performance Minerals (France)
Minerals Technologies Inc. (US)
Huber Engineered Materials (US)
Yuncheng Chemical Industrial Co. Ltd (China)
Zhejiang JiandeLonghua Plastic Chemical Co. Ltd (China)
Maruo Calcium Co. Ltd. (Japan)
GLC Minerals Inc. (US)
Calchem Industries (India) Ltd
Graymont Limited (Canada)
Fujian Sanmu Nano Calcium Carbonate Co. Ltd (China)
and Mississippi Lime Company (US)