EX-21.1 15 dex211.txt LIST OF SUBSIDIARIES Exhibit 21.1 ------------ Subsidiaries of MedSource Technologies, Inc. Jurisdiction of Subsidiary* Organization ----------- ------------ MedSource Technologies, LLC Delaware A.P.X. Acquisition Corp. Delaware Brimfield Precision, LLC Delaware Hayden Precision Industries, LLC Delaware Kelco Acquisition LLC Delaware MedSource Technologies Newton, Inc. Delaware MedSource Trenton, Inc. Delaware The MicroSpring Company, LLC Delaware National Wire and Stamping, Inc. Colorado Portlyn, LLC Delaware Tenax, LLC Delaware Texcel, Inc. Massachusetts Thermat Acquisition Corp. Delaware ----------- * Subsidiaries of subsidiaries are indicated by indentation.