Atome Energy (AIM:ATOM), the AIM-listed green ammonia and fertiliser developer, served a Notice of Dispute and Intent to Submit a Claim to Arbitration on the Republic of Paraguay on 17 September, filed through law firm White & Case under the UK-Paraguay bilateral investment treaty.
The move relates to Atome's $665 million Villeta Project, which the company describes as the largest single foreign industrial investment in Paraguay's history.
An internationally reputable damages expert has independently assessed the potential claim as very substantial, running well into nine figures in US dollars, which Atome says would rank among the largest ever brought against the Paraguayan state under any bilateral investment treaty.
The dispute centres on Paraguay's revocation of presidential decrees that had underpinned the Villeta project and provided price and term certainty under its power purchase agreement.
The notice calls on Paraguay to negotiate an amicable resolution and has been shared with the UK government, the Paraguayan embassy in London, and the EU, French, German and US embassies in Asuncion.
Under the treaty, Atome must pursue the claim through the International Centre for Settlement of Investment Disputes in Washington DC if no resolution is reached within three months.
The Villeta project carries binding funding commitments from IDB Invest, the International Finance Corporation, the European Investment Bank, the Green Climate Fund, Germany's DEG, Impact Fund Denmark and hydrogen investor Hy24, and counts Schroders, Baker Hughes and Casale among its major third-party shareholders and stakeholders.
Atome said its other projects remain unaffected and that it will continue seeking an amicable resolution while reserving its rights under international law.
News Intelligence what this means for the company
Atome Energy has filed a formal arbitration notice against Paraguay over the Villeta green fertiliser project, claiming damages well into nine figures after the government revoked presidential decrees underpinning the project's power purchase agreement. The move escalates a dispute that emerged after the company secured $665 million in project financing and reached financial investment decision in May 2026; Paraguay's decree revocation has now forced Atome into international arbitration under the UK-Paraguay bilateral investment treaty, with a three-month window for negotiated settlement before the case moves to ICSID in Washington DC.
- The dispute directly threatens the Villeta project's 2028 operational target and the $665 million in committed financing from IDB Invest, IFC, EIB, the Green Climate Fund, DEG, Impact Fund Denmark and Hy24.
- Atome's other projects (Costa Rica, Caribbean pipeline of ~600MW) remain unaffected by this Paraguay dispute, but the company's ability to deploy capital and management focus is now divided between arbitration and development.
The arbitration filing transforms Villeta from a development-stage project into a contingent liability play: shareholders now face binary outcomes—either a nine-figure damages award (which would dwarf the company's current scale) or a negotiated settlement that may require material concessions on project economics. The dispute also introduces sovereign risk and treaty enforcement uncertainty that were not priced into the May 2026 FID.
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