EX-21.1 4 a2017wec10kexhibit211.htm WEC EXHIBIT 21.1
Exhibit 21.1
WEC ENERGY GROUP, INC.
SUBSIDIARIES AS OF DECEMBER 31, 2017
The following table includes the subsidiaries of WEC Energy Group, a diversified holding company incorporated in the state of Wisconsin, as well as the percent of ownership, as of December 31, 2017:

Subsidiary * |  | State of Incorporation or Organization |  | Percent Ownership
Wisconsin Electric Power Company |  | Wisconsin |  | 100%
Bostco LLC |  | Wisconsin |  | 100%
Wisconsin Gas LLC |  | Wisconsin |  | 100%
ATC Holding LLC |  | Wisconsin |  | 100%
ATC Development Manager, Inc. |  | Delaware |  | 75.17%
ATC Holdco, LLC |  | Delaware |  | 75.17%
ATC Management Inc. |  | Wisconsin |  | 26.24%
American Transmission Company LLC |  | Wisconsin |  | 26.24%
Bluewater Natural Gas Holding, LLC |  | Delaware |  | 100%
Bluewater Gas Storage, LLC |  | Delaware |  | 100%
BGS Kimball Gas Storage, LLC |  | Delaware |  | 100%
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%
Wisconsin Energy Capital Corporation |  | Wisconsin |  | 100%
WEC Business Services LLC |  | Delaware |  | 100%
WEC Investments, LLC |  | Delaware |  | 100%
Upper Michigan Energy Resources Corporation |  | Michigan |  | 100%
Integrys Holding, Inc. |  | Wisconsin |  | 100%
Wisconsin Public Service Corporation |  | Wisconsin |  | 100%
Wisconsin Valley Improvement Company |  | Wisconsin |  | 27%
Wisconsin River Power Company |  | Wisconsin |  | 50%
WPS Investments, LLC |  | Wisconsin |  | 88%
American Transmission Company LLC |  | Wisconsin |  | 34%
UMERC 2018 Merger Corp. |  | Wisconsin |  | 100%
ATC Management Inc. |  | Wisconsin |  | 34.07%
WPS Investments, LLC |  | Wisconsin |  | 12%
Michigan Gas Utilities Corporation |  | Delaware |  | 100%
Minnesota Energy Resources Corporation |  | Delaware |  | 100%
Peoples Energy, LLC |  | Delaware |  | 100%
The Peoples Gas Light and Coke Company |  | Illinois |  | 100%
North Shore Gas Company |  | Illinois |  | 100%
Peoples Energy Ventures, LLC |  | Delaware |  | 100%
WPS Power Development, LLC |  | Wisconsin |  | 100%
WPS Visions, Inc. |  | Wisconsin |  | 100%
Penvest, Inc. |  | Michigan |  | 100%

* | 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, 2017. Indirectly owned subsidiaries are listed under the subsidiaries through which WEC Energy Group, Inc. holds ownership.