Sibanye-Stillwater has reached a commercial settlement with Appian Capital Advisory, agreeing to pay $215 million to resolve a protracted legal dispute stemming from the South African miner’s decision to abandon a $1 billion acquisition of two Brazilian assets in early 2022. The agreement, which includes £5 million in previously paid legal fees, was announced on 10 November 2025, mere hours before a scheduled trial in London to determine the full extent of damages.
The controversy dates back to October 2021, when Sibanye-Stillwater revealed plans to purchase Atlantic Nickel, owner of the Santa Rita nickel mine, and Mineração Vale Verde, operator of the Serrote copper-gold mine, from Appian for a total of $1 billion in cash. The deal was intended to bolster the company’s exposure to battery metals, complementing its established gold and platinum group metals operations in South Africa and the United States, alongside existing interests such as a lithium project in Finland and a nickel processing facility in France.
Just three months later, in January 2022, Sibanye-Stillwater abruptly terminated the transaction, pointing to a geotechnical incident—a pit wall dislocation—at the Santa Rita mine as justification. Appian contested this move, arguing that the event did not constitute a material adverse change sufficient to warrant withdrawal. In February 2022, the London-based investment firm initiated proceedings in the High Court of Justice in England, seeking damages exceeding $1.2 billion, inclusive of the original purchase price and an estimated $218 million in royalties.
A pivotal ruling came in October 2024, when the UK court found Sibanye-Stillwater liable for unlawfully breaching the agreement, setting the stage for a quantum hearing that could have resulted in a payout surpassing $720 million, according to the miner’s own earlier assessments. The settlement averts that risk, with both parties expressing satisfaction at drawing a line under the matter after nearly four years of litigation.
Executives from both companies highlighted the benefits of the resolution. Sibanye-Stillwater’s leadership described it as being firmly in the best interests of the group and its stakeholders, enabling a shift in focus towards operational stability and portfolio growth without the burden of ongoing legal uncertainty. Appian’s chief executive similarly welcomed the outcome as constructive, allowing the firm to redirect resources towards fund management and expansion opportunities.
Analysts reacted favourably to the news. According to a note from BMO Capital Markets, as reported by MINING.COM, the settlement represents a modest positive development for Sibanye-Stillwater, as the company can cover the amount from existing cash reserves while eliminating a significant overhang that has lingered over its shares. This sentiment was echoed in market performance, with the firm’s US-listed shares rising 6.5% at the open on 10 November, pushing its market capitalisation close to $12 billion. In Johannesburg trading, shares climbed as much as 7.1% to close at 48.96 rand, contributing to year-to-date gains exceeding 200%, largely driven by stronger prices for platinum group metals and gold.
The Santa Rita operation, one of the world’s largest open-pit nickel sulphide mines, is approaching the end of its surface phase and is poised to transition to underground mining, potentially extending its lifespan significantly. Meanwhile, the Serrote mine in Alagoas is projected to yield around 20,000 tonnes of copper-equivalent per year over a 14-year period.
This is not the only battery metals venture Sibanye-Stillwater has reconsidered in recent years. Earlier in 2025, the company withdrew from a planned investment in the Rhyolite Ridge lithium-boron project in Nevada, originally unveiled in 2021, amid challenging market conditions for such commodities. The Appian resolution, however, provides closure and clarity, allowing the miner to prioritise consistent delivery across its diverse global assets.