Stillwater Critical Minerals Reports Wide Polymetallic Expansion Drilling Including 40.8 Meters at 1.0 gt Palladium, Platinum and Gold, within Nickel-Copper-Cobalt Sulphide Mineralization

About this update from Stillwater Critical Minerals Corp

VANCOUVER, BC - 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 . Highlights 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. CM2025-01: Bulk tonnage zones including 204.1 meters ('m') @ 0.22% Recovered Nickel Equivalent ('NiEq') from 277.4 m; Mid-grade zones including 40.8 m @ 0.44% NiEq from 329.2 m and Higher-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 and 1.2 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 and Mid-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 and Mid-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 and Higher-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. Iron Mountain results extend known mineralization approximately 50 meters in both east and west directions from past drilling within the HGR resource. 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, commented 'Platinum is an order of magnitude scarcer than gold, while there are very few PGE bulk tonnage near-surface deposits remaining in the world. Chrome Mountain continues to deliver wide intervals of Platreef-style mineralization enriched in platinum and palladium associated with magmatic nickel-copper sulphide mineralized zones. The 2025 drilling at HGR intersected a similar style and thickness of mineralization. We are now working with Glencore and Expert Geophysics to refine 2026 drill targets with a focus on expansion of shallow resources in the Chrome and Iron Mountain areas. Within the 20 km detailed in the model of the main claim block, drilling has now defined mineralization along a total strike length of 3.3 km within the five resource areas, indicating significant opportunity for continued near-surface resource growth.' About Stillwater Critical Minerals Corp. Stillwater Critical Minerals (TSX.V: PGE | OTCQB: PGEZF | FSE: J0G) is a mineral exploration and development company advancing its 100%-owned Stillwater West Ni-PGE-Cu-Co + Au project in the Stillwater mining district of Montana, USA . Stillwater West is directly adjacent to Sibanye-Stillwater's operating Stillwater mines and processing infrastructure, the only primary PGE-producing complex in the United States . An NI 43-101 mineral resource estimate released in January 2023 positions Stillwater West as one of the few significant U.S. -based nickel + PGE resources and includes ten minerals currently listed as critical in the United States . With strategic investments by Glencore and an experienced technical team with Bushveld and Platreef-style expertise, the Company is well positioned to advance the project toward the next phase of technical studies and resource growth drilling. Stillwater also holds a 49% interest in the high-grade Drayton-Black Lake -gold project adjacent to Nexgold Mining's development-stage Goliath Gold Complex in northwest Ontario , currently under an earn-in agreement with Heritage Mining , and the Kluane PGE-Ni-Cu-Co critical minerals project on trend with Nickel Creek Platinum's Wellgreen deposit in Canada's Yukon Territory . The Company also holds the Duke Island Cu-Ni-PGE property in Alaska and maintains a back-in right on the high-grade past-producing Yankee-Dundee in BC, following its sale in 2013. Contact: Michael Rowley Email: [email protected] Tel: (604) 357 4790 Web: http://criticalminerals.com Forward-Looking Statements This news release includes certain statements that may be deemed 'forward-looking statements' or 'forward-looking information'. In particular, this press release contains forward-looking information relating to, among other things, the interpretation of exploration results, the potential for resource expansion, the timing and results of future resource estimates (including the targeted H1 2026 updated MRE), the timing and success of exploration activities, permitting timelines, and future plans and objectives of the Company. All statements in this release, other than statements of historical facts, are forward-looking statements that involve various risks and uncertainties. Although Stillwater Critical Minerals believes the expectations expressed in such forward-looking statements are based on reasonable assumptions, such statements are not guarantees of future performance and actual results or developments may differ materially from those in the forward-looking statements. (C) 2026 Electronic News Publishing, source ENP Newswire

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