EXHIBIT 21 List of Subsidiaries of the Company - ----------------------------------- The following is a list of Mentor Graphics Corporation operating subsidiaries. Mentor Graphics has no parent companies. SUBSIDIARY PERCENT OWNED Anacad Electrica Engineering Egypt 100% Anacad Electrical Engineering SARL (France) 100% Antares Corporation 100% CAE Technology, Inc. 100% dQdt, Inc. 100% European Development Center 74% Exemplar Logic, Inc. 100% Interconnectix, Inc. 100% Mentor Graphics (Canada) Ltd. 100% Mentor Graphics (Denmark) A/S 100% Mentor Graphics (Finland) OY 100% Mentor Graphics (France) SARL 100% Mentor Graphics (Schweiz) AG Switzerland 100% Mentor Graphics (Singapore) PTE. LTD. 100% Mentor Graphics (Taiwan) Co. Ltd. 100% Mentor Graphics (United Kingdom) Ltd. 100% Mentor Graphics Design S.A. (Spain) SA 100% Mentor Graphics Deutschland (GmBH) 100% Mentor Graphics Israel Ltd. 100% Mentor Graphics Japan Co. Ltd. 100% Mentor Graphics Netherlands BV 100% Mentor Graphics Scandinavia AB 100% Meta Systems S.A. 100% Microtec Research Japan Co. Ltd. 100% Microtec Research, Inc. 100% Model Technology Inc. 100% Open Networks Engineering, Inc. 100% Precedence Incorporated 100% Royal Digital Centers, Inc. 100% Seto Software GmbH 100%