Mr. Sam Pigott reports

LITHIUM ARGENTINA ANNOUNCES $220-MILLION OF NEW DEBT FACILITIES CLOSED AT CAUCHARI-OLAROZ

The Cauchari-Olaroz lithium brine operation, held through Minera Exar S.A., has closed on $220-million of new unsecured debt facilities, further strengthening Lithium Argentina AG's financial position and enhancing financing flexibility as it continues to advance an expansion plan to increase production capacity by an additional 45,000 tonnes per annum of lithium carbonate equivalent (Stage 2). All monetary amounts in this news release are expressed in United States dollars.

The debt facilities consist of:

• $50-million facility: closed in June, 2026, with a two-year term, to replace existing short-term credit facilities;
• $170-million facility: closed in August, 2026, with a syndicate of international banks. The $170-million credit facility has a three-year term with an interest rate under 5 per cent.

Sam Pigott, chief executive officer of Lithium Argentina, commented: "These financings -- unsecured and attractively priced -- reflect confidence in Cauchari-Olaroz, the strength of our partnership with Ganfeng and the strong cash flow generation from the operation. Together with the recent RIGI approval, the new debt facilities strengthen our balance sheet and provide the funding flexibility to advance our long-term growth strategy. We look forward to sharing further detail on stage 2 as we complete the updated development plan in the coming months."

The debt facilities are unsecured, provide flexibility for further distributions from Cauchari-Olaroz, support additional debt capacity (including project debt) and are available for drawdown until second quarter of 2027. They are supported by a guarantee from Ganfeng Lithium Co. Ltd. with Lithium Argentina providing a counter-guarantee to Ganfeng for 49 per cent of the debt outstanding.

The debt facilities form part of Lithium Argentina's broader strategy to optimize its capital structure by utilizing debt financing at the operating asset level, while reducing debt at the corporate level. This approach is expected to improve financing efficiency and provide additional flexibility from both tax and foreign exchange management perspectives.

Next steps

The company continues to advance stage 2 and the recent approval of the stage 2 RIGI application further enhances the project's development profile. Upcoming milestones related to the growth plans at Cauchari-Olaroz include:

• Stage 2 permitting: The environmental permit application was submitted in December, 2025, underpinned by the completion of a basin-wide hydrogeological resource model that supports the stage 2 production capacity.
• Stage 2 development plan: Technical and engineering studies are continuing, with results of an updated development plan expected in the coming months.

About Lithium Argentina AG

Lithium Argentina is a producer of lithium carbonate for use primarily in lithium-ion batteries and electric vehicles. The company, in partnership with Ganfeng Lithium Group Co. Ltd., operates the Cauchari-Olaroz lithium brine operation in the Jujuy province of Argentina and is advancing PPG in the Salta province of Argentina. Lithium Argentina currently trades on the Toronto Stock Exchange and on the New York Stock Exchange under the ticker LAR.

Cauchari-Olaroz is 44.8 per cent owned by the company, 46.7 per cent by Ganfeng and 8.5 per cent by JEMSE, a mining investment company owned by the government of Jujuy province in Argentina.

We seek Safe Harbor.