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SUBSIDIARY (a) | STATE OF INCORPORATION | PURPOSE | ||||||||||||
| Northern States Power Company (a Minnesota corporation) | Minnesota | Electric and gas utility | ||||||||||||
| Northern States Power Company (a Wisconsin corporation) | Wisconsin | Electric and gas utility | ||||||||||||
| Public Service Company of Colorado | Colorado | Electric and gas utility | ||||||||||||
| Southwestern Public Service Company | New Mexico | Electric utility | ||||||||||||
| WestGas InterState, Inc. | Colorado | Natural gas transmission company | ||||||||||||
| Xcel Energy Wholesale Group Inc. | Minnesota | Intermediate holding company for subsidiaries providing wholesale energy | ||||||||||||
| Xcel Energy Markets Holdings Inc. | Minnesota | Intermediate holding company for subsidiaries providing energy marketing services | ||||||||||||
| Xcel Energy International Inc. | Delaware | Intermediate holding company for international subsidiaries | ||||||||||||
| Xcel Energy Ventures Inc. | Minnesota | Intermediate holding company for subsidiaries developing new businesses | ||||||||||||
| Xcel Energy Retail Holdings Inc. | Minnesota | Intermediate holding company for subsidiaries providing services to retail customers | ||||||||||||
| Xcel Energy Communications Group Inc. | Minnesota | Intermediate holding company for subsidiaries providing telecommunications and related services | ||||||||||||
| Xcel Energy WYCO Inc. | Colorado | Intermediate holding company holding investment in WYCO | ||||||||||||
| Xcel Energy Services Inc. | Delaware | Service company for Xcel Energy system | ||||||||||||
| Xcel Energy Transmission Holding Company, LLC | Delaware | Intermediate holding company for subsidiaries developing and providing energy transmission services | ||||||||||||
| Xcel Energy Venture Holdings, Inc. | Minnesota | Intermediate holding company holding investment in Energy Impact Fund | ||||||||||||
| Nicollet Project Holdings LLC | Minnesota | Intermediate holding company holding investment in Nicollet Projects I LLC and Nicollet Projects II LLC | ||||||||||||
| Nicollet Holdings Company LLC | Minnesota | Intermediate holding company for subsidiaries procuring equipment for renewable generation facilities at other subsidiaries | ||||||||||||
| Xcel Energy Nuclear Services Holdings, LLC | Delaware | Intermediate holding company for nuclear subsidiaries | ||||||||||||