EX-21.1 2 d641755dex211.htm EX-21.1

Exhibit 21.1

SUBSIDIARIES OF THE REGISTRANT

As of September 30, 2013

Subsidiary |  | Jurisdiction of Incorporation
ICS Holdings LLC IES Commercial, Inc. IES Commercial & Industrial, LLC IES Consolidation LLC IES Management, LP IES Management ROO, LP IES Operations Group, Inc. IES Properties, Inc. IES Purchasing and Materials, Inc. IES Renewable Energy, LLC IES Residential, Inc. IES Tangible Properties, Inc. IES Shared Services, Inc. IES Subsidiary Holdings, Inc. |  | Arizona Delaware Delaware Delaware Texas Texas Delaware Delaware Delaware Delaware Delaware Delaware Delaware Delaware
Integrated Electrical Finance, Inc. |  | Delaware
HK Engine Components, LLC |  | Indiana
Magnetech Industrial Services, Inc. |  | Indiana
Key Electrical Supply, Inc. |  | Texas
Thomas Popp & Company |  | Ohio