EX-21 5 bkh-ex21.htm EX-21

Exhibit 21

BLACK HILLS CORPORATION

SUBSIDIARIES

December 31, 2023

| Subsidiary Name | State of Origin
1. | Black Hills Colorado Electric, LLC * | Delaware
2. | Black Hills Colorado Gas, Inc. * | Colorado
3. | Black Hills Colorado IPP, LLC * | South Dakota
4. | Black Hills Colorado Wind, LLC | Delaware
5. | Black Hills Electric Generation, LLC * | South Dakota
6. | Black Hills Electric Parent Holdings, LLC | South Dakota
7. | Black Hills Energy Arkansas, Inc. * | Arkansas
8. | Black Hills Energy Renewable Resources, LLC | South Dakota
9. | Black Hills Energy Services Company * | Colorado
10. | Black Hills Exploration and Production, Inc. * | Wyoming
11. | BHERR Holdings, LLC | South Dakota
12. | Black Hills Gas, Inc. | Delaware
13. | Black Hills Gas, LLC | Delaware
14. | Black Hills Gas Holdings, LLC | Delaware
15. | Black Hills Gas Parent Holdings II, Inc. | Delaware
16. | Black Hills Gas Resources, Inc. * | Colorado
17. | Black Hills/Iowa Gas Utility Company, LLC * | Delaware
18. | Black Hills/Kansas Gas Utility Company, LLC * | Kansas
19. | Black Hills Nebraska Gas, LLC * | Delaware
20. | Black Hills Non-regulated Holdings, LLC | South Dakota
21. | Black Hills Plateau Production, LLC * | Delaware
22. | Black Hills Power, Inc. * | South Dakota
23. | Black Hills Service Company, LLC * | South Dakota
24. | Black Hills Shoshone Pipeline, LLC * | Wyoming
25. | Black Hills Utility Holdings, Inc. * | South Dakota
26. | Black Hills Wyoming, LLC | Wyoming
27. | Black Hills Wyoming Gas, LLC * | Wyoming
28. | Cheyenne Light, Fuel and Power Company * | Wyoming
29. | Mallon Oil Company, Sucursal Costa Rica | Costa Rica
30. | N780BH, LLC | South Dakota
31. | Rocky Mountain Natural Gas LLC * | Colorado
32. | Wyodak Resources Development Corp. * | Delaware

* doing business as Black Hills Energy