Atome plc (AIM: ATOM), the UK's only dedicated international industrial-scale low-carbon fertiliser company, has issued an update on its investment dispute with Paraguay concerning its flagship Villeta Project. The company states it remains cautiously optimistic that a negotiated resolution can be achieved, while confirming that a three-month waiting period under the UK-Paraguay Bilateral Investment Treaty expires on 17 December 2026. If no satisfactory progress is made by that date, Atome will be able to submit arbitration claims, which its legal advisers at White & Case LLP have assessed could extend well into nine figures in US dollars in potential gross damages if successful.

Key Points

  • Atome plc (AIM: ATOM) is an AIM-listed green fertiliser developer focused on Latin America
  • The company is in confidential negotiations to resolve its investment dispute with Paraguay over the Villeta Project
  • The UK-Paraguay Bilateral Investment Treaty waiting period expires 17 December 2026, after which arbitration claims may be submitted
  • Investors should watch whether a negotiated resolution is reached before the December deadline, and what further detail Atome discloses if arbitration proceedings commence

Villeta Project Background and the Scale of Atome's Paraguay Investment

The Villeta Project reached unconditional Final Investment Decision in May 2026, supported by US$665 million in project finance from leading international development finance institutions and private infrastructure investors. The project holds a minimum 10-year Definitive Offtake Agreement with Yara International for all of Villeta's green fertiliser production, alongside a US$465 million fixed-price EPC contract with Swiss engineering specialist Casale S.A. Atome's product — green Calcium Ammonium Nitrate — is designed to reduce the food sector's reliance on fossil fuel-derived nitrogen fertiliser across the Mercosur region of South America.

Confidential Negotiations Continue as Debt and Equity Providers Remain Supportive

Atome states it is seeking in good faith to negotiate a solution to the investment dispute with relevant Paraguayan stakeholders. The announcement confirms that the company's debt and equity providers remain patient and supportive, with certain funders offering potential further financial support if required. Atome is also working constructively with EPC contractor Casale S.A. on a cost-effective path forward should an agreement with Paraguay ultimately be reached. The company states it has kept shareholder interests at the forefront of its approach throughout these discussions.

White & Case Legal Opinion Points to Potential Nine-Figure Arbitration Claim

Should the dispute fail to reach an amicable resolution, Atome states that legal advisers White & Case LLP have provided a robust opinion on the merits of its case, while an independent quantum assessment suggests potential gross damages could extend well into nine figures in US dollars if the arbitration is successful. However, the company explicitly cautions shareholders that there is no certainty as to the level of any determined arbitration award at this stage. Further details, including timing, would be disclosed if proceedings are formally commenced.

Project Finance Arrangements Would Terminate if the Villeta Project Fails

Atome's announcement sets out a significant risk for investors: if the dispute cannot be resolved and the project fails, all debt funding arrangements — including those with IFC, IDB Invest, the European Investment Bank, FMO, and the Global Climate Fund — as well as preferred equity subscriptions with Hy24, IFDK, DEG, and IFC, the Yara offtake agreement, and all Casale arrangements, would fail and be terminated. This would include cancellation of these parties' interests in Atome's shares, representing a material structural risk investors may be closely monitoring ahead of the 17 December deadline.