Expansion Drilling At Stillwater West Project

VANCOUVER – Stillwater Critical Minerals Corp. reported on the resource expansion drill campaign at the Company’s Stillwater West project in Montana. The Chrome Mountain deposit area and the HGR deposit at Iron Mountain drilling intersected sulphide-rich polymetallic nickel-copper-cobalt-platinum-palladium-gold (Ni-Cu-Co-PGE-Au) mineralization that extends beyond the limits of the January 2023 Mineral Resource Estimate (2023 MRE).
Stillwater West is one of the few U.S. critical minerals projects with a significant nickel and platinum group element (PGE) resource and is located immediately adjacent to Sibanye-Stillwater’s Stillwater mines, the only primary PGE producer in the United States.
The 2025 drill program was designed to expand the January 2023 MRE along a 10-kilometer (“km”) mineralized trend at Stillwater West, where a broad zone of sulphide-rich nickel, copper, cobalt, PGE, gold and chromium mineralization has been defined across multiple deposits. Four holes were completed in the Chrome Mountain resource area and two holes with a second drill rig about seven km east in the HGR resource area at Iron Mountain.
Chrome Mountain results returned wide intersections rich in palladium, platinum and gold within magmatic nickel and copper sulphide mineralization.
“The results confirm the extension of sulphide-rich polymetallic mineralization beyond the current Chrome Mountain and HGR resource boundaries,” said Michael Rowley, President and CEO. “The consistent platinum and palladium enrichment within the broader nickel-copper sulphide system continues to demonstrate the strength of the project’s multi-metal profile as we advance toward an updated Mineral Resource Estimate in the first half of 2026. Assays for rhodium remain pending and will be reported as received.”