Sibanye-Stillwater Cuts PGM Output Guidance After Seismic Events Force Temporary Shaft Closures in South Africa
May 29, 2026 — Sibanye-Stillwater Limited issued a production guidance revision on Thursday after a cluster of seismic events registering between 2.1 and 2.8 on the local magnitude scale forced the temporary suspension of hoisting operations at two shafts within its Rustenburg platinum group metals complex in South Africa's North West Province. The company now expects full-year 4E PGM output — platinum, palladium, rhodium, and gold on a combined basis — to come in at 1.55 to 1.65 million ounces, down from the original guidance range of 1.72 to 1.82 million ounces issued in February. At current spot prices, the revision implies a revenue shortfall of approximately $380 million relative to the company's prior planning assumptions.
The seismic events occurred between May 24 and May 27 and were centred in the deeper sections of the Siphumelele and Khuseleka shafts, both of which operate at depths exceeding 1,000 metres. Sibanye-Stillwater said all personnel were evacuated safely and that there were no fatalities or serious injuries, but that engineering inspections of ground support infrastructure must be completed before hoisting can resume. The company expects a phased restart at Siphumelele within three to four weeks, while the timeline for Khuseleka remains under review pending a more detailed geotechnical assessment.
Palladium Supply Picture Tightens Further
The guidance cut arrives at a sensitive moment for the palladium market. South Africa is the world's second-largest palladium producer after Russia, and Sibanye-Stillwater's Rustenburg complex is one of the largest single-site sources of the metal. Spot palladium had already been firming in recent sessions on the back of modest recovery in automotive catalytic converter demand from Chinese vehicle manufacturers, and the Sibanye news pushed prices sharply higher in early London trading on Friday, with palladium briefly touching $1,185 per troy ounce — its highest level since November 2025.
Analysts at Metals Focus said the revised guidance adds roughly 120,000 to 130,000 ounces of additional palladium supply risk to a market they had previously characterized as roughly balanced for 2026. "This is a meaningful supply-side shock," said Metals Focus senior analyst David Mitchell. "If the Khuseleka restart is delayed beyond eight weeks, the palladium market could swing to a deficit in the second half of the year, which would lend fundamental support to prices well above current levels."
Platinum, which has a heavier weighting in the Rustenburg ore body than palladium, also firmed on the news, rising 0.9 percent to $1,042 per ounce in morning trade in London. The platinum market has been in structural surplus for much of the past two years, but analysts noted the Sibanye disruption could meaningfully reduce that surplus if the shaft closures extend into Q3.
Broader South African Mining Context
The incident highlights persistent operational risks in South Africa's deep-level mining sector, where aging infrastructure and increasingly challenging geological conditions continue to test productivity. Sibanye-Stillwater noted that it has invested heavily in seismic monitoring systems across its South African portfolio following a fatal seismic event at one of its gold shafts in 2023, and that early detection protocols had allowed for a swift and safe evacuation at both affected shafts this week.
The company said it would provide a further operational update, including revised quarterly phasing of production, at its scheduled investor day on June 18. Chief Executive Neal Froneman said in a brief statement that the company's financial position remained "robust" and that the guidance revision, while material, would not affect the company's ability to service its debt obligations or maintain its dividend policy.
For platinum group metals investors, the Sibanye news reinforces a recurring theme: above-ground supply buffers in the PGM complex are thin, and operational disruptions at a handful of major South African and Russian producers retain the capacity to move markets sharply and quickly.
Sarah Mitchell is Senior Markets Analyst at LiveMetalPrice.com. This article is for informational purposes only and does not constitute investment advice.