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Stillwater Critical Minerals: Neighbor on Strike. The PEA Will Stand Alone

Mining Network Sep 28, 2026 11:09

Summary

Sibanye-Stillwater faces a labor strike at its Montana mines and Columbus plant while running costs above $1,300 an ounce against a stated $1,000 target.

Stillwater Critical Minerals confirms no talks with its neighbor, though analysts model its future feed through Sibanye's two underused sulfide mills and smelter-refinery.

A 29.4-million-tonne indicated and 805-million-tonne inferred resource underpins a standalone PEA (preliminary economic assessment — a first-pass economics study) in about a year.

Shareholder Glencore wants a bigger US footprint and joined Project Vault, the new US critical-minerals stockpile program.

Near-term news flow includes drill results, an OTCQX listing, metallurgy work, and plans for the company's largest drill program in 2027.

Key points on Sibanye-Stillwater

  • Rowley confirms a strike is underway at Sibanye-Stillwater's Stillwater mine and, he believes, at the Columbus smelter/hydromet facility as of the interview.
  • Rowley says Sibanye-Stillwater is publicly struggling with costs, trying to get from over $1,300 down to a $1,000 target, and has been upfront that it has to look at its options.
  • Rowley stresses there is no corporate connection and no discussions between Sibanye-Stillwater and Stillwater Critical Minerals, though the neighboring infrastructure and good neighbor agreement are relevant.
  • Sibanye-Stillwater runs two sulphide flotation mills and a smelter-refinery complex that Rowley says sit underutilized, making them a relevant, compatible processing option for Stillwater's similar nickel-copper sulphide ore.

Key points on Stillwater Critical Minerals Corp

  • The new MRE holds about 5 billion lb of combined copper, nickel and cobalt, 7.7 million oz of PGMs and gold, plus separately 6.6 billion lb of chromium, and Rowley says the resource is now big enough that significant growth is not needed.
  • The priority is upgrading inferred resources to indicated and completing a substantive PEA in about a year (as of the September 2026 interview), deliberately built to stand alone without requiring government support.
  • Glencore is a supportive shareholder engaged through a quarterly technical committee, and Rowley says the company has well exceeded the tonnages and grades Glencore wanted to see.
  • There is no mine plan yet, but Rowley confirms the neighbor's underutilized sulphide flotation mills are relevant and a good processing fit given the similar nickel-copper sulphide ore.
  • Expected news flow as of the interview: near-term drill results, work on a 'QX' listing, a government-progress update, and likely the biggest drill program ever in the new year (a forward-looking statement).

Mike Rowley's takeaways

  • Top takeaway Rowley's core argument: the new resource is big enough to stop growing, and the next step is a substantive, buildable PEA in about a year that stands on its own without government support.
  • On the neighbor's troubles, he confirms the strike at Sibanye-Stillwater's operations, notes its $1,000 cost target versus over $1,300 currently, and says his earlier-stage company could help — while stressing there are no discussions between the two.
  • He says government support is not a requirement, citing deep engagement with Senator Tim Sheehy and Congressman Troy Downing and a government push to accelerate projects like his.
  • He argues the bigger challenge is downstream — finding domestic buyers for a high-sulphide flotation product — ideally by expanding nickel carbonate output already underway in Columbus, with the current operator or in parallel.
  • He expects near-term drill results, a 'QX' listing effort, metallurgy results feeding the PEA, and likely the company's biggest drill program ever in the new year (forward-looking statements as of the interview).