# Sibanye-Stillwater US labor disputes

> Live situation record from CLSTR: https://clstr.news/situations/sibanye-stillwater-us-labor-disputes
> Updated: 2026-09-30T16:19:00.000Z. Sources: 6. Developments: 2.

Labor tensions emerged at Sibanye-Stillwater’s United States platinum-group metal (PGM) operations when the United Steelworkers union issued a strike notice. The notice applied to the Stillwater-East Mine and metallurgy operations in Columbus, with workers intending to strike on September 3, 2026, following four months of contract negotiations.

By late September, a new collective bargaining agreement was ratified for the East Boulder mine in Montana. This contract, effective from August 1, 2026, through July 31, 2029, includes tiered wage increases and supports the company’s transition toward increased mechanization and team-based incentive models. Despite the resolution at the East Boulder site, strikes by union members continued at the Stillwater East mine and the Columbus metallurgical plant.

## Timeline

### 2026-09-30: Sibanye-Stillwater reaches labor agreement at Montana mine

Sibanye-Stillwater employees at the East Boulder mine in Montana have ratified a new labor contract with the United Steelworkers, featuring tiered wage increases through 2029.

3 sources. https://clstr.news/cluster/sibanye-stillwater-reaches-labor-agreement-at-montana-mine

### 2026-09-02: Sibanye-Stillwater faces strike notice at US PGM operations

United Steelworkers members at Sibanye-Stillwater's Stillwater-East Mine and Columbus operations plan to strike on September 3, 2026, amid ongoing contract negotiations.

3 sources. https://clstr.news/cluster/sibanye-stillwater-faces-strike-notice-at-us-pgm-operations

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Cite as: Sibanye-Stillwater US labor disputes. CLSTR, https://clstr.news/situations/sibanye-stillwater-us-labor-disputes