Sibanye-Stillwater (SBSW) receives strike notice for sections of its US pgm operations; East boulder mine not included in strike notice; negotiations continuing

• Receives strike notice for stillwater East mine and Columbus facility, strike to begin Sept 3, 2026

Strike notices of this kind are a standard feature of the US PGM labour cycle and have historically served as much as a negotiating device as a precursor to actual stoppages; the gap between notice and the stated start date is the window in which settlements have typically been reached, and the company's own track record in its larger home jurisdiction is one of prolonged, publicly fought wage disputes that have at times run for weeks and required intervention well above the bargaining table. The transmission channel for the metal is concentrate and refined output from the affected Stillwater East mine and the Columbus metallurgical facility, with East Boulder explicitly excluded, which caps the share of the complex's production at risk and matters for assessing any palladium and platinum supply response. The peer comparison that has historically framed these episodes is the far larger South African PGM belt, against which the US operations are a modest but strategically watched source of supply, so precedent suggests the metal market reaction tends to be contained unless stoppage risk migrates or lengthens. What separates the cases is duration: brief strikes have historically been absorbed through inventory and processing flexibility, while extended ones begin to show up in refined availability and treatment terms. Worth watching is whether negotiations conclude before the notice expires, whether the excluded East Boulder unit gets drawn in, and any parallel commentary on guidance for the affected segment.