EX-21.1 4 a2057452zex-21_1.txt EXHIBIT 21.1 EXHIBIT 21.1 SUBSIDIARIES
STATE OF PERCENTAGE JURISDICTION OF VOTING INCORPORATION SECURITIES OWNED ------------- ---------------- Teradyne ATE (Wuxi) Co., Ltd...................................... Peoples Republic of China 100% Teradyne Benelux, Inc. (Ltd.)..................................... Delaware 100% Teradyne Canada Limited........................................... Canada 100% Teradyne de Costa Rica S.A........................................ Costa Rica 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 S.r.L............................................. Italy 100% Teradyne Japan, Ltd............................................... Delaware 100% Teradyne K.K...................................................... Japan 100% Teradyne Korea, Ltd............................................... Delaware 100% Teradyne Leasing, Inc............................................. Massachusetts 100% Teradyne Malaysia, Ltd............................................ Delaware 100% Teradyne de Mexico, S.A. de C.V................................... Mexico 100% Teradyne Netherlands B.V.......................................... Netherlands 100% Teradyne Netherlands, Ltd......................................... Delaware 100% Teradyne Philippines Limited...................................... Delaware 100% Teradyne Realty, Inc.............................................. Massachusetts 100% Teradyne S.A.S.................................................... France 100% Teradyne Scandinavia, Inc......................................... Delaware 100% Teradyne Singapore, Ltd........................................... Delaware 100% Teradyne Spain, Inc............................................... Delaware 100% Teradyne Taiwan, Ltd.............................................. Delaware 100% Teradyne Thailand Inc............................................. Delaware 100% Alternative Delivery Systems Support, Inc......................... North Carolina 100% Control Automation Inc............................................ Delaware 100% Herco Technology Corp............................................. California 100% Kinetrix, Inc..................................................... Delaware 100% Megatest Corporation.............................................. Delaware 100% Megatest H.K. Ltd................................................. Hong Kong 100% Teradyne Philippines Ltd.......................................... California 100% Perception Laminates, Inc......................................... California 100%
Softbridge, Inc................................................... Delaware 100% Zehntel Holdings, Inc............................................. California 100% 1000 Washington, Inc.............................................. Massachusetts 100% Teradyne EMS Inc.................................................. Delaware 100% Radio Acquisition Corp............................................ Massachusetts 100%