Stillwater Mobilizes for Largest Exploration and Resource Expansion Program to Date at Stillwater West, Montana, USA

About this update from Stillwater Critical Minerals Corp

VANCOUVER, BC / ACCESS Newswire / June 15, 2026 / Stillwater Critical Minerals Corp. (TSXV:PGE)(OTCQB:PGEZF)(FSE:J0G) (the "Company", or "Stillwater") is pleased to announce that contractors have been retained and mobilization of drill rigs is expected in short order for the Company's largest exploration and resource expansion campaign to date at its flagship Stillwater West Ni-PGE-Cu-Co-Cr + Au project in Montana, USA. The 2026 drill program is designed to build upon the successful 2025 program and the upcoming updated Mineral Resource Estimate, with a focus on expanding mid- to high-grade polymetallic sulphide mineralization within and adjacent to existing resource areas. The program follows significant advancements achieved over the past year, including the expansion of the Company's geological model across more than 20 kilometres of strike length, completion of resource growth drilling, and continued refinement of multiple large-scale polymetallic sulphide targets identified through the Company's district-scale geological and geophysical programs. Primary objectives of the 2026 field program include: Michael Rowley, President and CEO of Stillwater Critical Minerals, commented "We are excited to begin another important field season at Stillwater West as we continue advancing a large-scale domestic source of ten critical minerals in Montana. With strong support from our strategic partner Glencore plc, a growing U.S. focus on critical mineral security, and an upcoming updated Mineral Resource Estimate expected shortly, we believe 2026 will mark another significant step in advancing the project. Our objective remains clear: to continue growing and advancing the resource base while demonstrating the strategic importance of the Stillwater district to U.S. critical mineral supply chains." Dr. Danie Grobler, Vice-President Exploration, commented "The successful completion of our 2025 drilling program has significantly advanced our understanding of the scale and potential of the Stillwater West project. The combination of resource expansion opportunities and multiple district-scale near-surface exploration targets provide an exceptional platform for continued growth as we advance one of the most significant undeveloped critical mineral systems in the United States. Having spent much of my career working on large-s...

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