EXHIBIT 21.1 SUBSIDIARIES OF THE REGISTRANT Moldflow Scandinavia (Sweden) Moldflow International Pty. Ltd. (Australia) Moldflow Pty. Ltd. (Australia) Moldflow Italia s.r.l. (Italy) Moldflow Korea Limited (Korea) Moldflow (Europe) Ltd. (United Kingdom) Moldflow Vertriebs GmbH (Germany) Moldflow Japan KK (Japan) Moldflow Singapore Pte. Ltd. (Singapore) Moldflow France (France) Moldflow BV (Netherlands) Moldflow Taiwan, Inc. (Taiwan) Moldflow Ireland, Ltd. (Ireland) Moldflow Iberia s.l. (Spain) Advanced CAE Technology, Inc. (New York) Branden Technologies, Inc. (Oregon) Moldflow Merger Corp. (Delaware) Moldflow (Guangzhou) Ltd. (China) Moldflow Mauritius Pty. Ltd. (Mauritius) Moldflow Securities Corp. (Massachusetts) American MSI Corporation LLC (Delaware)