East Boulder
Mining
Type
Operating
Status
🇺🇸 United States, Montana (Stillwater Complex)
Country
Project information
As at 31 December 2025
Aggregation level:
Asset
Aggregation level:
Asset
Report standard:
Sec S K 1300
Report standard:
Sec S K 1300
Ownership %:
100
Ownership %:
100
Operator:
Yes
Operator:
Yes
Extraction:
Underground
Extraction:
Underground
Description
As at 31 December 2025
100%-owned underground palladium-platinum (2E) mine on the western portion of the J-M Reef of the Stillwater Complex in Montana, operated as part of the US PGM segment alongside the Stillwater mine, with concentrate processed through the Columbus metallurgical complex. Detailed per-category estimates are published in the 2025 Mineral Resource and Reserve supplement.
Mining metrics
As at 31 December 2025 · exclusive
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Reserves & resources — detail
As at 31 December 2025
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