Exhibit 21.1

List of Subsidiaries of NioCorp Developments Ltd. (the “Company”)

Name

State/Province of
Formation

Ownership

0896800 B.C. Ltd. (“0896800”)

British Columbia

100%

Elk Creek Resources Corp.

Delaware

81.33%(1)

NioCorp Advanced Metals and Alloys, LLC

 

Delaware

 

100%

NioCorp Technologies Limited

United Kingdom

100%

 

(1)

 Represents 100% of Class A common stock owned by 0896800, and 3,516,140 Vested Shares and 3,391,596 Earnout Shares (each as defined in the Company’s Annual Report on Form 10-K for the year ended June 30, 2026) held by third parties, and outstanding as of June 30, 2026.