Stillwater Mining Company is engaged in the development, extraction, processing, smelting and refining of palladium, platinum and associated metals (platinum group metals (PGMs)) produced by mining a geological formation in south-central Montana, known as the J-M Reef. The Company operates through five segments: Mine Production, PGM Recycling, Canadian Properties, South American Properties and All Other. The Company is engaged in recycling spent catalytic converters and other industrial sources. The Company is also engaged in expanding its mining development along the J-M Reef, and holds exploration-stage properties at the Marathon PGM copper property, adjacent to Lake Superior in northern Ontario, Canada (Marathon), and at the Altar copper-gold property in San Juan province, Argentina. In addition to palladium and platinum, the Company's operations produce associated by-product metals, including nickel, copper and minor amounts of gold, silver and rhodium.