EXHIBIT 21
AMCOL INTERNATIONAL CORPORATION
SUBSIDIARY LISTING
COMPANY NAME COUNTRY STATE OWNERSHIP %
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AMCOL Egypt SAE 70
AMCOL Europe Limited England 100
AMCOL Health & Beauty Solutions, Incorporated USA DE 100
AMCOL International B.V. Netherlands 100
AMCOL (Holdings) Ltd. England 100
AMCOL Holdings Canada Ltd. Canada Ontario 100
AMCOL Specialties Holdings, Inc. USA DE 100
American Colloid Company USA DE 100
Ameri-Co Carriers, Inc. USA NE 100
Ameri-Co Logistics, Inc. USA NE 100
Ashapura Minechem Ltd. India 22
Ashapura Volclay Limited India 50
CETCO China Ltd. China 100
CETCO Contracting Services Company USA DE 100
CETCO (Europe) Limited England 100
CETCO Holdings B.V. Netherlands 100
CETCO Iberia S.L. Spain 100
CETCO Korea Ltd. Korea 100
Comercializadora y Exportadora Cetco Latino America Limitada Chile 100
CETCO Oilfield Services Company USA DE 100
CETCO-POLAND Sp. z o.o Poland 100
CETCO Technologies (Suzhou) Co. Ltd. China 100
Colin Stewart Minchem Limited England 100
Colloid Environmental Technologies Company USA DE 100
Egypt Bentonite & Derivatives Company Egypt 25
Egypt Mining & Drilling Chemicals Company Egypt 25
Egypt Nano Bentonite Co. Egypt 26.5
Inner Mongolia Tianyu Chemical Industry Co. Ltd. China 80
Intergeo Services LLC USA PA 100
Lafayette Well Testing, Inc. USA LA 100
Linteco Geotechnische Systeme GmbH Austria 100
Linteco Iberia S.L. Spain 100
Montana Minerals Development Company USA MT 100
Nanocor, Inc. USA DE 100
Nanocor, Ltd. England 100
Silgel Packaging Limited England 100
Volclay de Mexico, S.A. de C.V. Mexico 49
Volclay DongMing Industrial Minerals Co., Ltd. China 100
Volclay International Corporation USA DE 100
Volclay Japan Co. Ltd. Japan 50
Volclay Korea Ltd. Korea 100
Volclay MinChem (Jianping) Co. Ltd. China 100
Volclay Pty. Ltd. Australia 100
Volclay (Tianjin) Industrial Minerals Co., Ltd. China 100
Volclay Siam Ltd. Thailand 100