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EXHIBIT 21
SUBSIDIARIES OF MILACRON INC.
<Table>
<Caption>
DATE
INCORPORATED
OR (IF LATER)
INCORPORATED DATE PERCENTAGE
STATE OR COUNTRY ACQUIRED OWNED
-------------------- ------------- ----------
MILACRON INC...................................... Delaware 1983
Milacron Capital Holdings B.V. ................. The Netherlands 2000 100%
Milacron Investments B.V. ................... The Netherlands 2000 100%
Milacron B.V. ............................... The Netherlands 1952 100%
Milacron Nederland B.V. ................... The Netherlands 1998 100%
Cimcool Europe B.V. .................... The Netherlands 1989 100%
Ferromatik Milacron
Benelux B.V. ......................... The Netherlands 1993 100%
Cimcool Industrial Products B.V. ....... The Netherlands 1960 100%
Oak International Europe Ltd. ........ England 1999 100%
Milacron Kunststoffmaschinen
Europa GmbH............................. Germany 1990 100%
Uniloy Milacron Germany GmbH.......... Germany 1998 100%
Indu Tecnospol s.r.o. .............. Czech Republic 1998 100%
Ferromatik Milacron
Maschinenbau GmbH.................. Germany 1993 100%
Ferromatik Milacron.............. South Africa 1994 100%
Ferromatik Milacron A/S.......... Denmark 2002 100%
Klockner Ferromatik AG........... Switzerland 2003 100%
D-M-E Normalien GmbH.................. Germany 1996 100%
EOC France S.A.R.L. ............... France 2001 99%
EOC Normalien Praha s.r.o. ........ Czech Republic 2001 100%
D-M-E Belgium CVBA......................... Belgium 1996 100%
VSI International N.V. ................. Belgium 1996 100%
Milacron France SAS........................ France 2002 100%
Milacron U.K. Ltd. ........................ England 2002 100%
Uniloy Milacron Italy S.R.L. .............. Italy 1998 100%
Milacron Plastics Iberica S.L. ............ Spain 2002 100%
Milacron Assurance Ltd. ........................ Bermuda 1977 100%
Milacron-Holdings Mexico S.A. de C.V. .......... Mexico 1992 100%
Milacron Marketing Company...................... Ohio 1931 100%
Milacron International
Marketing Company.......................... Delaware 1966 100%
Milacron Equipamentos Plasticos Ltd. ... Brazil 1997 100%
</Table>
<Table>
<Caption>
DATE
INCORPORATED
OR (IF LATER)
INCORPORATED DATE PERCENTAGE
STATE OR COUNTRY ACQUIRED OWNED
-------------------- ------------- ----------
Northern Supply Company, Inc. ............... Minnesota 1998 100%
Ferromatik Milacron India Limited............ India 1995 86%
Nickerson Machinery Chicago Inc. ............ Illinois 1999 100%
Pliers International, Inc. .................. Delaware 1999 100%
Cincinnati Milacron Trading Co. LTD.......... Shanghai 1998 100%
Milacron Resin Abrasives Inc. .................. Delaware 1991 100%
D-M-E Company................................... Delaware 1996 100%
D-M-E USA.................................... Michigan 1998 100%
D-M-E of Canada Limited.................... Canada 1996 100%
Progress Precision...................... Canada 2001 100%
450500 Ontario Limited.................. Canada 1996 100%
Ontario Heater and Supply Company....... Canada 2000 100%
Rite-Tek Canada......................... Canada 2000 100%
Japan D-M-E Corporation.................... Japan 1996 51%
D-M-E Hong Kong Ltd. ...................... Hong Kong 1996 51%
D-M-E Manufacturing Inc. .................... Delaware 1999 100%
Uniloy Milacron Inc. ........................... Delaware 1998 100%
Uniloy Milacron Machinery -- Mexico, S.A.
de C.V. ................................... Mexico 1998 100%
Uniloy Milacron Services -- Mexico, S.A.
de C.V. ................................... Mexico 1998 100%
Uniloy Milacron U.S.A. ......................... Michigan 1998 100%
Milacron Industrial Products, Inc. ............. Michigan 1999 100%
Oak International, Inc. ..................... Michigan 1999 100%
Cimcool Industrial Products Inc. ............... Delaware 1999 100%
Cincinnati Milacron IPK, Inc. ............... Korea 1993 100%
Milacron Canada, Inc. ....................... Ontario 1997 100%
Milacron-Mexicana Sales S.A. de C.V. ...... Mexico 1993 100%
Milacron Plastics Technologies Group Inc. ...... Delaware 1999 100%
Milacron Plastics Machinery (Jinangyin)
Co., Ltd. ............................... China 2004 70%
</Table>