A wholly owned, integrated US PGM business comprising the Stillwater and East Boulder underground mines, their onsite flotation concentrators, and the Columbus metallurgical complex. Mechanised cut-and-fill is the dominant mining method, supplemented by sub-level extraction. Stillwater East and East Boulder remain productive while Stillwater West is on care and maintenance. At 31 December 2025, the operations contained 80.9Moz of inclusive 2E Mineral Resources and 19.4Moz of 2E Mineral Reserves. The latest disclosed S-K 1300 economic analysis is the 31 December 2024 reserve case; the subsequent mechanisation strategy targets approximately 410koz of steady-state annual 2E production and AISC near US$1,000/2Eoz by the end of 2028 but does not disclose an updated NPV.
- Country
- United States
- Commodity
- PGE
- Stage
- Production