United States Antimony Corporation (NYSE: UAMY) has resumed mining activities at its Stibnite Hill property in Montana, reporting progress in its 2026 campaign with 42 truckloads of stibnite ore transported since operations restarted in April.
The company has moved approximately 576 tons of ore to date, averaging 14 tons per truck with an antimony content of roughly 10%. Daily operations currently sustain about three truckloads, or 42 tons of ore per day, more than double the pace achieved during the 2025 campaign.
In the 2025 campaign, operations spanned 45 days and transported around 800 tons of antimony ore before concluding in November due to winter weather. The current campaign benefits from improved operational efficiency, according to Joseph Bardswich, Executive Vice President and Chief Mining Engineer, who noted that the company is moving rock off the mountain over twice as fast as the previous year.
Material from Stibnite Hill is transported to the company’s flotation mill in Radersburg, Montana, for processing. The resulting antimony concentrate is then shipped to either the Thompson Falls smelter or the Madero smelter in Mexico for conversion into finished products. United States Antimony describes itself as the only fully integrated antimony producer outside China and Russia, handling mining, processing, and smelting operations.
