Stillwater Critical Minerals Reports Wide and High-Grade Near-Surface Ni-Cu-Co-PGE-Au Sulphide Mineralization Extending CZ Deposit at Stillwater West Project in Montana, USA

About this update from Stillwater Critical Minerals Corp

VANCOUVER, BC / ACCESS Newswire / February 26, 2026 / Stillwater Critical Minerals Corp. (TSX.V:PGE)(OTCQB:PGEZF)(FSE:J0G) (the "Company", or "Stillwater") reports the first results from its 2025 resource expansion drill campaign at the Company's 100%-owned Stillwater West project in Montana, USA. 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. This release is focused on the CZ deposit area at Iron Mountain where drilling intersected shallow, near-surface 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 ("MRE"). Highlights Table 1 - Highlight 2025 drill results from Iron Mountain CZ deposit area. Notes: 1) Highlighted significant intercepts with grade-thickness values over 7 percent-meter recovered NiEq are presented above, except as noted. 2) Recovered Nickel Equivalents ("NiEq") are presented for comparative purposes using conservative long-term metal prices (all USD): $8.00/lb nickel (Ni), $4.50/lb copper (Cu), $15.00/lb cobalt (Co), $1,250/oz platinum (Pt), $1,250/oz palladium (Pd), $3,000/oz gold (Au), and $6,500/oz rhodium (Rh). 3) NiEq is determined as follows: NiEq% = [Ni% x recovery] + [Cu% x recovery x Cu price/ Ni price] + [Co% x recovery x Co price / Ni price] + [Pt g/t x recovery / 31.103 x Pt price / Ni price / 2,204 x 100] + [Pd g/t x recovery / 31.103 x Pd price / Ni price / 2,204 x 100] + [Au g/t x recovery / 31.103 x Au price / Ni price / 2,204 x 100]. 4) In the above calculations: 31.103 = grams per troy ounce, 2,204 = lbs per metric tonne, and 100 and 0.01 convert assay results reported in % and g/t. 5) The following recoveries have been assumed for purposes of the above equivalent calculations: 85% for Ni and 90% for all other listed metals, based on recoveries at similar nearby operations. 6) Total metal equivalent values include both base and precious metals. In terms of dollar value, 0.20% nickel equates to a copper value of 0.36%, or a palladium value of 0.88 g/t, using the above metal values. 7) Intervals are reporte...

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