Exhibit 21.1

WISCONSIN ENERGY CORPORATION

SUBSIDIARIES AS OF DECEMBER 31, 2011

The following table includes the subsidiaries of Wisconsin Energy Corporation, a diversified holding company incorporated in the state of Wisconsin, as well as the percent of ownership, as of December 31, 2011:

	State of
	Incorporation	Percent
Subsidiary (a)	or Organization	Ownership
Wisconsin Electric Power Company	Wisconsin	100%
ATC Management Inc.	Wisconsin	26.24%
American Transmission Company LLC	Wisconsin	23.04%
Bostco LLC	Wisconsin	100%
Wisconsin Gas LLC	Wisconsin	100%
ATC Holding LLC	Wisconsin	100%
American Transmission Company LLC	Wisconsin	3.20%
W.E. Power, LLC	Wisconsin	100%
Elm Road Generating Station Supercritical, LLC	Wisconsin	100%
Elm Road Services, LLC	Wisconsin	100%
Port Washington Generating Station, LLC	Wisconsin	100%
Wisvest LLC	Wisconsin	100%
Wispark LLC	Wisconsin	100%
CenterPoint Wispark Land Company LLC	Wisconsin	32.95%
2825 Four Mile Road LLC	Wisconsin	100%
Wisconsin Energy Capital Corporation	Wisconsin	100%

(a) Omits the names of certain subsidiaries, which if considered in the aggregate as a single subsidiary, would not constitute a "significant subsidiary" as of December 31, 2011. Indirectly owned subsidiaries are listed under the subsidiaries through which Wisconsin Energy Corporation holds ownership.