For immediate release

19 December 2025

ATOME PLC

("ATOME" or the "Company")

S&P upgrades Paraguay country rating to Investment Grade

ATOME (AIM: ATOM), the world-leading low-carbon fertiliser developer and the UK's only dedicated international industrial scale low-carbon fertiliser company, is pleased to note that S&P Global Ratings, the leading international rating agency, has updated Paraguay to investment grade.

S&P upgrade

ATOME notes that, on 17 December 2025, S&P Global Ratings, the leading international ratings agency, has raised Paraguay's long-term foreign and local currency sovereign credit rating to BBB- with outlook stable.

S&P states that the upgrade reflects Paraguay's recent history of sound economic and pro market policies, continued regulatory stability and a focus on strengthening governance, leading to strong economic growth and resilience with Paraguay's GDP forecast now revised to 5.4% for this current year.

These actions led to increasing investor confidence, enabling foreign investment and improving the country's medium-term economic outlook. It is noted that investments in ammonia and agro-industry are expected to provide Paraguay with favourable export prospects and boost consistent growth.

James Spalding, President of ATOME Paraguay, commented:

"This welcome recognition of Paraguay's improved international financial standing confirms the robust and fertile environment for our landmark low-carbon fertiliser project in Villeta.

"S&P now joins Moody's in raising Paraguay to investment grade, which is a solid acknowledgement of the long-standing track record of macroeconomic stability, strengthened by the country's recent growth and increasing the capacity for foreign direct investment.

"We congratulate Paraguay on this historic achievement and are proud to form part of this strong and vibrant economy as we move to achieve our target of declaring FID at Villeta by the end of January 2026."

For further information on ATOME, please visit the Company's Curation Connect showcase at: https://app.curationconnect.com/company/Atome-71605

For more information, please visit https://www.atomeplc.com or contact:

About ATOME

ATOME PLC is an AIM-listed company targeting green fertiliser production with 445-megawatt of projects in Paraguay and a further pipeline of potential projects in Central America. ATOME has now created its ATOME POWER division which is in the early stages of developing a significant green power generation and infrastructure business. ATOME's projects are situated at the heart of one of the world's largest food export hubs - the Mercosur region in the Southern Cone of South America with the Argentinian and Brazilian markets next door. ATOME's production will disrupt the region's heavy dependence on imported fossil fuel generated fertilizer, contributing to regional food security goals.

ATOME's first project in Villeta, Paraguay, benefits from a 145MW renewable power purchase agreement and a 30-hectare site in a tax-free zone, with an option already secured to purchase an additional 13 hectares of adjacent land. Front End Engineering Design studies have been completed and a 10-year Definitive Offtake Agreement signed with Yara International, the leading international fertiliser company, for offtake of all of Villeta's green fertiliser production. In early 2025, ATOME announced Hy24, the leading clean hydrogen asset manager, as anchor and lead equity investor in the project, and confirmed the signing of the US$465 million fixed-price EPC contract with leading ammonia and fertilizer engineering specialist Casale S.A. The Company is now negotiating the project finance with a view to commencing work in 2025. There is a further up to 300MW of renewable power reserved for ATOME in Paraguay.

In Costa Rica, The National Ammonia Corporation S.A. was formed in 2022 with local partner Cavendish S.A. based in Costa Rica to develop green fertiliser projects for the region. As well as straddling the Pacific and Atlantic Oceans, Costa Rica is a democratic Central American country. In agriculture, Costa Rica is the second largest supplier of pineapples in the world and is in the top ten banana growers.

All power for ATOME is from 100% renewable sources and all chosen sites are located close to the power and water sources and export facilities to serve significant domestic and then international demand. Roughly a third of human-caused GHG emissions is linked to food production according to UN data, and fertiliser use and production is the source of more emissions than the shipping and aviation industries combined. ATOME's green Calcium Ammonium Nitrate product will contribute to decarbonising the food sector from the bottom up, getting to the root of the food value chain's emissions. ATOME's renewably-generated fertiliser is both clean and promotes high crop yields, unlike conventional nitrogen fertiliser which has a heavy carbon footprint.

The Company has a green-focused Board which is supported by major shareholders including Peter Levine, Schroders, a leading fund manager, and Baker Hughes, a global technology company operating in the energy and industry sectors.

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