1
EX-21.1
SUBSIDIARIES
EXHIBIT 21.1
PRESENT SUBSIDIARIES
PERCENTAGE
STATE OR OF VOTING
JURISDICTION SECURITIES
INCORPORATION 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%