Exhibit 21
Subsidiaries of the Registrant
Technitrol, Inc., which has no parent, has the following subsidiaries:
Name Incorporation Percent Owned
- ---- ------------- -------------
AMI Doduco Espana, S. L. Spain 100%
AMI Doduco (France) S. A. S. France 100%
AMI Doduco GmbH Germany 100%
AMI Doduco Hungary Kft. Hungary 100%
AMI Doduco Italia S.r.l. Italy 100%
AMI Doduco (Mexico), S. de R. L. de C. V. Mexico 100%
AMI Doduco (NC), Inc. Delaware 100%
AMI Doduco (PA), Inc. Pennsylvania 100%
AMI Doduco (PR), Inc. Delaware 100%
AMI Doduco Singapore Holding Pte. Ltd. Singapore 100%
AMI Doduco (Tianjin) Electrical Contacts Manufacturing Co. People's Republic of China 100%
AMI Doduco (UK) Ltd. United Kingdom 100%
CST Electronics Co., Ltd. Hong Kong 100%
Dongguan Pulse Electronics Co., Ltd. People's Republic of China 100%
ECM, Inc. Arizona 100%
Electro Componentes Mexicana S. A. de C. V. Mexico 100%
Electro Corporacion Mexicana S. A. de C. V. Mexico 100%
Excelsus Technologies, Inc. California 100%
Excelsus Technologies Limited Hong Kong 100%
MCS Holdings Electrotecnica Espana, S. A. Spain 100%
Pulse Canada Ltd. Canada 100%
Pulse Components Ltd. Hong Kong 100%
Pulse Electronics (Europe) Ltd. United Kingdom 100%
Pulse Electronics Ltd. Hong Kong 100%
Pulse Electronics (Singapore) Pte. Ltd. Singapore 100%
Pulse Engineering, Inc. Delaware 100%
Pulse GmbH Germany 100%
Pulse S. A. France 100%
Technitrol Delaware, Inc. Delaware 100%
Technitrol Singapore Holdings Pte. Ltd. Singapore 100%
TNL Singapore Components Holdings Pte. Ltd. Singapore 100%
Valor GTI Electronics (Shenzhen) Co. Ltd. People's Republic of China 100%