Stillwater Mining Company is the only U.S. producer of platinum group metals (PGMs) and the largest primary producer of PGMs outside of South Africa and the Russian Federation. PGMs are rare precious metals used in a wide variety of applications, including auto catalysts, fuel cells, hydrogen purification, electronics, jewelry, dentistry, medicine and coinage. Stillwater Mining Company is engaged in the development, extraction, processing, smelting and refining of PGMs from a geological formation in southern Montana known as the J-M Reef and from the recycling of spent catalytic converters. The J-M Reef is the only known significant source of PGMs in the United States and the highest-grade PGM resource in the world.
The Company conducts mining operations at its Stillwater and East Boulder mines in southern Montana. Concentrating plants are located at both mines to upgrade ore to a concentrate. The Company operates a smelter, refinery and laboratory at Columbus, Montana to further upgrade the concentrate to a PGM-rich filter cake. Another key segment of the Company’s operations is the recycling of spent catalyst material to recover PGMs.
The Company owns the Marathon PGM-copper deposit in Ontario, Canada, and the Altar porphyry copper-gold deposit located in the San Juan province of Argentina.
Stillwater Mining Company’s corporate office is located in Denver, Colorado.