Orion Engineered Carbons
Cabot Corporation
Birla Carbon
PCBL Limited
Himadri Specialty Chemical Ltd.
Continental Carbon
Imerys S.A.
Mitsubishi Chemical Holdings Corporation
Tokai Carbon Co. Ltd.
OMSK Carbon Group
Lion Specialty Chemicals Co. Ltd.
Denka Company Limited
Geotech International B.V.
Klean Industries Inc.
Black Bear Carbon B.V.
Beilum Carbon Chemical Limited
Zaozhuang Xinyuan Chemical Industry Co. Ltd.
Hangzhou Dimacolor Co. Ltd.
Henan Xinxu Chemical Co. Ltd.