EX-21 10 d285669dex21.htm EX-21 EX-21

Exhibit 21

UniSource Energy Corporation Subsidiaries

 

Subsidiary

   

State or Other Jurisdiction of

Incorporation or Organization

Tucson Electric Power Company (TEP)

    Arizona

TEP Subsidiaries:

   

San Carlos Resources Inc.

    Arizona

Escavada Company.

    Arizona

UniSource Energy Services, Inc. (UES)

    Arizona

UES Subsidiaries:

   

UNS Electric, Inc.

    Arizona

UNS Gas, Inc.

    Arizona