EX-21.1 5 dex211.txt SUBSIDIARIES OF THE COMPANY EXHIBIT 21.1 SUBSIDIARIES PRESENT SUBSIDIARIES
State or Jurisdiction Percentage of Voting Entity Name Incorporation Securities Owned ----------- ------------------------- -------------------- Teradyne Assembly Holdings Ltd..................... United Kingdom 100% Teradyne Assembly Limited.......................... United Kingdom 100% Teradyne ATE (Wuxi) Co., Ltd....................... Peoples Republic of China 100% Teradyne Benelux, Inc. (Ltd.)...................... Delaware 100% Teradyne Canada Limited............................ Canada 100% Teradyne Connection Systems de Mexico, S.A. de C.V. Mexico 100% Teradyne Connection Systems SDN BHD................ Malaysia 100% Teradyne Connections Systems (Shanghai) Co., Ltd... Peoples Republic of China 100% Teradyne de Costa Rica S.A......................... Costa Rica 100% Teradyne Diagnostic Solutions Inc.................. Delaware 100% Teradyne Diagnostic Solutions Limited.............. United Kingdom 100% Teradyne Diagnostic Solutions GmbH................. Germany 100% Teradyne EMS Inc................................... Delaware 100% Teradyne GmbH...................................... Germany 100% Teradyne Holdings Limited.......................... United Kingdom 100% Teradyne Limited................................... United Kingdom 100% Teradyne Hong Kong, Ltd............................ Delaware 100% Teradyne International, Ltd........................ Barbados 100% Teradyne Ireland Limited........................... Ireland 100% Teradyne Italia SrL................................ Italy 100% Teradyne Japan, Ltd................................ Delaware 100% Teradyne KK........................................ Japan 100% Teradyne Korea, Ltd................................ Delaware 100% Teradyne Leasing, Inc.............................. Massachusetts 100% Teradyne Malaysia, Ltd............................. Delaware 100% Teradyne de Mexico, SA de CV....................... Mexico 100% Teradyne Netherlands BV............................ Netherlands 100% Teradyne Netherlands, Ltd.......................... Delaware 100% Teradyne Performance Systems Limited............... United Kingdom 100% Teradyne Philippines Limited....................... Delaware 100% Teradyne Realty, Inc............................... Massachusetts 100% Teradyne SAS....................................... France 100% Teradyne Scandinavia, Inc.......................... Delaware 100% Teradyne Singapore, Ltd............................ Delaware 100% Teradyne Software and Systems Test, Inc............ Delaware 100% Teradyne Spain, Inc................................ Delaware 100% Teradyne Taiwan, Ltd............................... Delaware 100% Teradyne Thailand Inc.............................. Delaware 100% Aegis Properties Limited........................... United Kingdom 100% Alternative Delivery Systems Support, Inc.......... North Carolina 100% Control Automation, Inc............................ Delaware 100% GenRad, Inc........................................ Massachusetts 100% Autodiagnos, Inc................................ Delaware 100% Autodiagnos AB.................................. Sweden 100% Autodiagnos BV.................................. Netherlands 100% Autodiagnos GmbH................................ Germany 100% Autodiagnos LTD................................. United Kingdom 100%
State or Jurisdiction Percentage of Voting Entity Name Incorporation Securities Owned ----------- ------------------------- -------------------- Autodiagnos UK Limited.......... United Kingdom 100% GenRad AB....................... Sweden 100% GenRad GmbH..................... Germany 100% GenRad Limited.................. United Kingdom 100% GenRad SA....................... France 100% GenRad Asia PTE Limited......... Singapore 100% GenRad Benelux BV............... Netherlands 100% GenRad Canada Limited........... Canada 100% GenRad China Limited............ Peoples Republic of China 100% GenRad Europe Limited........... United Kingdom 100% GenRad Holdings Limited......... United Kingdom 100% GenRad Ireland LTD.............. Ireland 100% GenRad Mexico, Inc.............. Delaware 100% Mastertech Automotive Ltd....... United Kingdom 100% Mitron Europe Limited........... United Kingdom 100% Motor Industry Services Limited. United Kingdom 100% Herco Technology Corp.............. California 100% Kinetrix, Inc...................... Delaware 100% Megatest HK Ltd.................... Hong Kong 100% Tarstock Limited................... Ireland 100% Teradyne Philippines Ltd........... California 100% Perception Laminates, Inc.......... California 100% Softbridge, Inc.................... Delaware 100% TCMS, Inc.......................... Delaware 100% Zehntel Holdings, Inc.............. California 100% 1000 Washington, Inc............... Massachusetts 100%