United States Antimony Corporation is a mining and minerals processing company specializing in antimony, zeolite, and precious metals. It operates as a fully integrated producer, handling mining, purchasing, processing, smelting, and sales of antimony products including antimony oxide, antimony metal, and antimony trisulfide, alongside recovery of gold and silver from ore. Antimony oxide serves as a key component in flame-retardant systems for plastics, rubber, fabrics, paints, and paper, while antimony trisulfide is utilized in ammunition primers, including those approved for military use. The zeolite segment, through the Bear River Zeolite facility in Idaho, produces industrial minerals applied in water filtration, environmental cleanup, soil amendment, animal nutrition, odor control, and gas separation. With facilities in Montana and Mexico for antimony smelting and processing, the company supplies these critical materials primarily to markets in the United States, Mexico, and Canada, supporting industries such as defense, manufacturing, and environmental services. Founded in 1968 and headquartered in Thompson Falls, Montana, United States Antimony Corporation plays a vital role in the North American critical minerals supply chain.