Stillwater Critical Minerals Reports Wide Polymetallic Expansion Drilling Including 40.8 Meters at 1.0 g/t Palladium, Platinum and Gold, within Nickel-Copper-Cobalt Sulphide Mineralization at Stillwater West, Montana, USAVANCOUVER, BC / ACCESS Newswire / March 3, 2026 / Stillwater Critical Minerals Corp. (TSX.V:PGE)(OTCQB:PGEZF)(FSE:J0G) (the "Company", or "Stillwater") reports a second tranche of results from its 2025 resource expansion drill campaign at the Company's 100%-owned Stillwater West project in Montana, USA.This release presents results from the Chrome Mountain deposit area and the HGR deposit at Iron Mountain where 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 (the "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.HighlightsThe 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 (Figures 4 and 5).Chrome Mountain results returned wide intersections rich in palladium, platinum and gold within magmatic nickel and copper sulphide mineralization. As detailed in Table 1, broad, continuous bulk-tonnage intercepts contain internal higher-grade zones, demonstrating continuity across a thick mineralized package confirming significant opportunity for continued resource expansion beyond the 2023 MRE boundaries:CM2025-01:Bulk tonnage zones including 204.1 meters ("m") @ 0.22% Recovered Nickel Equivalent ("NiEq") from 277.4 m (see Table 1 for full metal grades);Mid-grade zones including 40.8 m @ 0.44% NiEq from 329.2 m; andHigher-grade zones including 4.9 m @ 0.77% NiEq from 354.2 m.These intercepts include:40.8 m @ 1.03 g/t 3E (Pt+Pd+Au) starting at 329.2 m;4.7 m @ 0.46% Ni, 0.48% Cu, 0.05% Co and 0.25 g/t 3E from 116.6 m;4.9 m @ 0.48 g/t Pt and 1.34 g/t Pd from 354.2 m; and1.2 m @ 0.59 g/t Pt and 2.44 g/t Pd starting at 387.7 m.CM2025-02:Bulk tonnage zones including 172.5 m @ 0.21% NiEq from surface and 176.8 m @ 0.20% NiEq from 282.2 m (see Table 1); andMid-grade zones including 29.3 m @ 0.40% NiEq from 29.3 m;These intercepts include 3.7 m @ 1.37 g/t 3E with 0.98 g/t Pd starting at 383.4 m.CM2025-03:Bulk tonnage zones including: 219.5 m @ 0.20% NiEq from 61.0 m (see Table 1); andMid-grade zones including 13.4 m @ 0.45% NiEq from 98.8 m.CM2025-04:Bulk tonnage and mid-grade zones including 4.9 m @ 0.53% NiEq from 39.0 m.IM2025-01:Bulk tonnage zones including 195.1 m @ 0.22% NiEq from 225.6 m;Mid-grade zones including 21.9 m @ 0.47% NiEq from 397.5 m; andHigher-grade zone: 3.7 m @ 0.75% NiEq from 412.1 m.These intercepts include 2.4 m @ 1.56 g/t 3E with 0.41 g/t Pt and 1.07 g/t Pd starting at 270.7 m and 13.4 m @ 0.37% Ni and 0.18% Cu from 402.3 m.IM2025-02:Higher-grade zone: 4.3 m @ 1.36% NiEq from 487.7 m, including 3.0 m @3.71 g/t 3E as 0.34 g/t Pt, 0.50 g/t Pd and 2.87 g/t Au.Chrome Mountain results extend known mineralization eastward toward historic drill holes, confirming strike continuity of the shallow-dipping conductive sulphide target and highlighting potential for continued resource expansion for approximately 325 meters east of the current resource area (Figure 8).Iron Mountain results extend known mineralization approximately 50 meters in both east and west directions from past drilling within the HGR resource (Figure 11).Assays for rhodium and other co-products are pending from all eight holes from the 2025 program.Stillwater is funded and permitted and is finalizing 2026 drill plans focused on resource growth and step-out testing of conductive sulphide targets.Drill core will be on display at core shack 3116B on March 3rd and 4th, 2026, at PDAC.Project Geophysicist Justin Modroo will be presenting Stillwater West airborne EM survey results in a technical session on March 4th at PDAC."These 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."Dr. Danie Grobler, Vice-President Exploration, comment