EX-21.1 3 a2023wec10kexhibit211.htm EX-21.1
Exhibit 21.1
WEC ENERGY GROUP, INC.
SUBSIDIARIES AS OF DECEMBER 31, 2023
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, 2023:

Subsidiary * |  | State of Incorporation or Organization |  | Percent Ownership
ATC Holding LLC |  | Wisconsin |  | 100%
American Transmission Company LLC |  | Wisconsin |  | 60.34%
ATC Development Manager, Inc. |  | Delaware |  | 74.73%
ATC Holdco LLC |  | Delaware |  | 75.17%
ATC Management Inc. |  | Wisconsin |  | 60.32%
Bluewater Natural Gas Holding, LLC |  | Delaware |  | 100%
BGS Kimball Gas Storage, LLC |  | Delaware |  | 100%
Bluewater Gas Storage, LLC |  | Delaware |  | 100%
Integrys Holding, Inc. |  | Wisconsin |  | 100%
Michigan Gas Utilities Corporation |  | Delaware |  | 100%
Minnesota Energy Resources Corporation |  | Delaware |  | 100%
Peoples Energy, LLC |  | Delaware |  | 100%
North Shore Gas Company |  | Illinois |  | 100%
Peoples Energy Ventures, LLC |  | Delaware |  | 100%
The Peoples Gas Light and Coke Company |  | Illinois |  | 100%
Wisconsin Public Service Corporation |  | Wisconsin |  | 100%
Wisconsin River Power Company |  | Wisconsin |  | 50%
Wisconsin Valley Improvement Company |  | Wisconsin |  | 27%
WPS Power Development, LLC |  | Wisconsin |  | 100%
WPS Visions, Inc. |  | Wisconsin |  | 100%
Upper Michigan Energy Resources Corporation |  | Michigan |  | 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%
WEC Business Services LLC |  | Delaware |  | 100%
WEC Infrastructure LLC |  | Delaware |  | 100%
Samson OpCo Holdings LLC |  | Delaware |  | 80%
Sapphire Sky Wind Energy Holdings LLC |  | Delaware |  | 90%
Thunderhead Wind Energy Holdings LLC |  | Delaware |  | 90%
WEC Infrastructure Wind Holding I LLC |  | Delaware |  | 100%
Bishop Hill Energy III Holdings LLC |  | Delaware |  | 90%
Blooming Grove Wind Energy Center Holdings LLC |  | Delaware |  | 90%
Coyote Ridge Wind, LLC |  | Oregon |  | 80%
Upstream Wind Energy Holdings LLC |  | Delaware |  | 90%
WEC Infrastructure Wind Holding II LLC |  | Delaware |  | 100%
Jayhawk Wind, LLC |  | Delaware |  | 90%
Tatanka Ridge Wind, LLC |  | Delaware |  | 85%
WEC Investments, LLC |  | Delaware |  | 100%
Wisconsin Energy Services, LLC |  | Wisconsin |  | 100%
Wisconsin Electric Power Company |  | Wisconsin |  | 100%
Wisconsin Energy Capital Corporation |  | Wisconsin |  | 100%
Wisconsin Gas LLC |  | Wisconsin |  | 100%
Wispark LLC |  | Wisconsin |  | 100%
Wisvest LLC |  | Wisconsin |  | 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, 2023. Indirectly owned subsidiaries are listed under the subsidiaries through which WEC Energy Group holds ownership.