Sumitomo Ambatovy Nickel-Cobalt Exit Marks Costly Retreat From Madagascar Laterite Project

Sumitomo

Sumitomo Ambatovy nickel-cobalt exit marks a major strategic retreat from one of the world’s largest laterite nickel operations. The Japanese trading and mining group will divest its 54.17% stake in Madagascar’s Ambatovy project to Ambatovy Mineral Resources Investment.

The Sumitomo Ambatovy nickel-cobalt exit is unusually costly. The transaction value is negative $418mn, meaning Sumitomo will pay to leave the asset after more than two decades of involvement.

The Sumitomo Ambatovy nickel-cobalt exit reflects years of operational instability, high costs and weak profitability. Sumitomo joined Ambatovy in 2005 and invested around $3bn, but the project generated cumulative losses of about ¥400bn.

The sale is expected to close in the first half of Sumitomo’s financial year ending 31 March 2027. Korea Mine Rehabilitation and Mineral Resources will retain its 45.82% stake.

Operational Instability Undermines a Strategic Nickel Asset

Ambatovy remains strategically important because it produces refined nickel and cobalt. These materials serve stainless steel, battery raw materials, superalloys and industrial supply chains.

However, the project has struggled to operate consistently. Ambatovy combines laterite mining, slurry transport and refining, making it a complex integrated operation with high technical and maintenance demands.

The project was suspended in February before Cyclone Gezani struck eastern Madagascar. It has not yet fully restarted, although market participants expect operations to resume during the current quarter.

Recovery efforts are still continuing. The project has also faced slurry pipeline damage and other processing issues in previous years, which affected output and reliability.

Ambatovy produced about 30,000t of refined nickel in 2025. Cobalt output was estimated at roughly 10% of nickel production.

That production profile gives the asset continuing supply-chain relevance. But strategic metal exposure alone cannot offset weak operating economics if reliability, costs and weather-related risks remain unresolved.

New Ownership Faces Production Reliability Test

AMRI, the buyer, is a UK-based consortium led by mining investment firm Essenwood and South African private equity firm Zungu Investments. The transaction gives the new group control of Sumitomo’s stake in a difficult but potentially valuable nickel-cobalt platform.

For Sumitomo, the divestment removes a long-running drag on earnings. The company expects to record a loss of about ¥70bn in its consolidated April-June results and a non-consolidated loss of about ¥85bn for the full financial year.

Sumitomo said tax effects should limit the net consolidated impact, and the transfer has already been included in its full-year earnings forecast.

For the nickel market, the key issue is not ownership alone. The immediate question is whether the new structure can stabilise output, repair operating weaknesses and restore confidence in Ambatovy’s supply.

Madagascar nickel-cobalt supply remains strategically relevant as buyers look beyond Indonesia-dominated nickel growth. But Ambatovy must prove that it can deliver refined nickel and cobalt reliably before it can regain stronger market importance.

The sale also highlights a broader industry lesson. Large laterite nickel projects can offer scale and battery-metal exposure, but they often carry high capital intensity, technical risk and sensitivity to market cycles.

The Metalnomist Commentary

Sumitomo’s exit shows that nickel-cobalt scale is not enough when operating reliability and cost control fail. Ambatovy’s next phase will depend on whether new owners can turn a strategically valuable asset into a commercially stable supplier.

Nickel Production Halted at Ambatovy Plant Following Pipeline Damage

Sumitomo Nickel

Nickel and cobalt production at Madagascar's Ambatovy plant has been suspended after damage to a slurry pipeline, a crucial component for transporting ore from the mine to the refinery. The suspension, announced by the plant’s majority owner, Japanese trading group Sumitomo, comes as a setback for one of the few remaining active producers of nickel briquettes.

Damage Sparks Concerns Over Ambatovy's Viability

On September 25, Sumitomo revealed that the pipeline damage led to an ore discharge, prompting the decision to halt operations. While there were no injuries reported, an investigation is underway to determine the cause of the incident. The disruption has raised concerns, particularly as Ambatovy is already grappling with high production costs and market pressures.

Ambatovy is one of the few facilities still capable of producing nickel briquettes, a key form of refined nickel used in various industries. With BHP no longer actively producing briquettes and Russia's Norilsk Nickel resuming production at its Harjavalta refinery after a temporary suspension by the London Metal Exchange, the global supply chain has faced volatility. However, trading firms report that the ban on Norilsk's production has been lifted, and output is ramping up, offering some relief to the market.

Despite this, the long-term future of Ambatovy remains uncertain. Trading companies have pointed out that the plant's high production costs significantly exceed current benchmark nickel prices, by as much as $10,000 per tonne, raising questions about its economic viability. "Sumitomo must be considering the mounting losses right now," a trading source remarked. "They have a reputation for being slow decision-makers, likely hesitating to halt production because they could absorb the losses against profits elsewhere."

The financial challenges facing the project have been underscored by a recent debt restructuring plan filed in a London court, as confirmed by Sumitomo Metals Mining representatives. This move suggests that the company is actively seeking solutions to mitigate the financial strain caused by declining nickel prices and operational inefficiencies.

In terms of output, Ambatovy's nickel production for April to June was around 8,000 tonnes, marking a 20% decline from the same period last year. The suspension of production due to the pipeline damage adds to existing concerns over the plant's future, and it remains to be seen how Sumitomo will navigate these mounting challenges.