United States Antimony Corp (NYSE American: UAMY) is a mineral processing company that mines, smelts, and sells antimony products, zeolite, and precious metals. Revenue comes from transactional sales of antimony oxide, antimony metal ingots, antimony trisulfide, zeolite in various grades, and refined and unrefined gold and silver. The company describes itself as the only U.S.-based domestic processor of antimony products and the only operator of a vertically integrated, permitted antimony smelter in the country, giving it a structural position for domestic customers requiring short processing and delivery times. Founded in January 1970 and headquartered in Montana, UAMY operates a processing facility in Sanders County, Montana, and two facilities through its USAMSA subsidiary in Mexico. In 2025, the company also initiated a bulk sampling program at its Stibnite Hill property in Montana, producing approximately 840 tons of antimony-bearing material, while sourcing ore from new suppliers for its Madero, Mexico facility. Net cash used in operating activities was $9.7 million in FY2025, driven by a $12.2 million increase in inventories. Gary C. Evans serves as Chairman and Chief Executive Officer.

Revenue model

Transactional sales of processed antimony products (antimony oxide, metal ingots, trisulfide), zeolite (coarse and fine, various sizes), and precious metals (gold and silver) to domestic and international customers.

Products and services

Antimony trioxide, antimony metal ingots, antimony trisulfide, coarse and fine zeolite, refined gold, unrefined gold, refined silver. Stibnite Hill bulk sampling program initiated in October 2025 as a potential future feedstock source.

Customers and end markets

Domestic U.S. customers are served via the Montana smelting facility; the filing does not specify end-market industries or customer concentration by name or percentage.

Value-chain role

Vertically integrated processor and smelter: sources ore from foreign suppliers and, to a limited extent, from its own Montana mining claims, then processes ore into finished antimony products and precious metals at facilities in Montana and Mexico for direct sale.

Geographic exposure

United States (Sanders County, Montana processing and smelting facility) and Mexico (two USAMSA processing facilities including the Madero facility). Ore sourced from foreign suppliers.

Source: SEC 10-K, filed 2026-03-19

Industry: Primary Smelting & Refining of Nonferrous Metals Peers: Ameritrust Corp US Gold Corp Graphene & Solar Technologies Ltd Idaho Strategic Resources Inc Liquidmetal Technologies Inc PureBase Corp Solitario Resources Corp