EXHIBIT 21.1
| Subsidiaries of Registrant as of December 31, 2024 | ||
| Name: | Jurisdiction | |
| Bear River Zeolite Company | Idaho | |
| Antimonio de Mexico, S.A. de C.V. | Mexico | |
| US Antimony de Mexico, S.A. de C.V. | Mexico | |
| Stibnite Holding Company US Inc. | Montana | |
| Antimony Mining and Milling US LLC | Montana | |
| AGAU Mines, Inc. | Montana | |
| Lanxess Laurel de Mexico, S.A. de C.V. | Mexico | |
| Great Land Minerals, LLC | Alaska | |
| Denali Minerals, LLC | Alaska | |
| Alaska Antimony LLC | Alaska | |
| UAMY Cobalt Corporation | Ontario, Canada | |