Montana Sulphur & Chemical Co.Montana, United States
Kunimine Industries Co., Ltd.
Mineral Technologies Pty Ltd.Queensland, Australia
Luossavaara-Kiirunavaara ABSweden
Zhejiang Changan Renheng Technology Co., Ltd.Zhejiang, China
Süd-Chemie AGBasel-Landschaft, Switzerland
Minerals Technologies, Inc.New York, United States
Wyo-Ben, Inc.Montana, United States
Harcros Chemicals, Inc.
American Colloid Co.
AquaBlok Ltd.Ohio, United States
J. C. Steele & Sons, Inc.North Carolina, United States