Xcel Energy 2006 Annual Report Download - page 147

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137
Exhibit 21.01
SUBSIDIARIES OF XCEL ENERGY INC.
SUBSIDIARY(a)
STATE OF
INCORPORATION PURPOSE
Northern States Power Co. (a Minnesota corporation) Minnesota Electric and gas utility
Northern States Power Co. (a Wisconsin corporation) Wisconsin Electric and gas utility
Public Service Co. of Colorado Colorado Electric and gas utility
Southwestern Public Service Co. New Mexico Electric utility
WestGas InterState Inc. Colorado Natural gas transmission
Xcel Energy Wholesale Group Inc. Minnesota Holding company providing
wholesale energy
Utility Engineering Corp.(b) Texas Engineering, design and
construction
Xcel Energy Markets Holdings Inc. Minnesota Holding company providing
energy marketing
Xcel Energy International Inc. Delaware Holding company with
international holdings
Xcel Energy Ventures Inc. Minnesota Holding company to develop
new businesses
Eloigne Co. Minnesota Owns and operates
affordable housing units
Xcel Energy Retail Holdings Inc. Minnesota Holding company providing
retail services
Xcel Energy Communications Group Inc. Minnesota Holding company providing
telecommunications
Seren Innovations, Inc.(c) Minnesota Communications and data
services
Xcel Energy WYCO Inc. Minnesota Holding company holding
investment in WYCO
Xcel Energy O&M Services Inc. Minnesota Holding company
Xcel Energy Services Inc. Minnesota Holding company
Xcel Energy Foundation Minnesota Charitable foundation
(a) Certain insignificant subsidiaries are omitted.
(b) In April 2005, Xcel Energy sold Utility Engineering Corp.
(c) In January 2006, Xcel Energy completed the sale of Seren Innovations.