-1- Exhibit (21) SUBSIDIARIES OF MILLIPORE CORPORATION Pursuant to Item 601, Paragraph 22, clause (ii) of Regulation S-K, the following list excludes subsidiaries who conduct no business operations or which have no significant assets. COMPANY JURISDICTION Millipore Asia Ltd. Delaware Millipore Cidra, Inc. Delaware Millipore Dublin International Finance Company Ireland Millipore Intertech (V.I.), Inc. U.S. Virgin Is. Millipore International Holding Company B.V. Netherlands Millipore Japan Company L.L.C. Delaware Millipore S.A./N.V. Belgium Millipore (Canada) Ltd. Canada Millipore (U.K.) Ltd. United Kingdom Millipore S.A. France Millipore Ireland B.V. Netherlands Millipore GmbH Germany Millipore S.p.A. Italy Millipore A.B. Sweden Millipore A.G. Switzerland Millipore A/S Denmark Millipore AS Norway Millipore Australia Pty. Ltd. Australia Millipore GesmbH Austria Millipore Iberica S.A. Spain Millipore S.A. de C.V. Mexico Millipore I.E.C., Ltda. Brazil Millipore OY Finland Millipore B.V. The Netherlands Millipore Korea Ltd. Korea Millipore China Ltd. Hong Kong Millipore KFT Hungary Millipore S.R.O. Czech Republic Millipore of New Hampshire, Inc. New Hampshire Millicorp, Inc. Delaware Minerva Insurance Corp. Ltd. Bermuda Nihon Millipore Limited Japan Millipore Investment Holdings Ltd. Delaware Immunosystems Incorporated Maine