Lithium Argentina AG

Technical Studies

A NI 43-101 (defined below) feasibility study was completed (Worley 2019) for Pastos Grandes by Millennial Lithium Inc. (“Millennial”) in 2019 and prior to the acquisition of Millennial by the Company in 2022. The feasibility study contemplated a 24,000 tpa battery-grade lithium carbonate production plant with a 40-year mine-life using conventional lithium processing technology. The Company is not treating the feasibility study mineral reserve estimate as a current mineral reserve estimate and no qualified person has done sufficient work to classify this historical mineral reserve estimate as a current mineral reserve. Following the Company’s acquisition of Millennial in January 2022, the Company retained Atacama Water, a hydrogeology consultancy specializing in brine, to prepare a technical report for Pastos Grandes with the objective of updating the mineral resource estimate for

lithium contained in the brine in the Salar de Pastos Grandes Basin, based on the consolidation and integration of available information.

On June 26, 2023, the Company announced a NI 43-101 technical report for Pastos Grandes has been completed and filed on SEDAR+ in connection with a mineral resource update for the project. The Technical Report is titled “NI 43-101 Technical Report, Lithium Resources Update, Pastos Grandes Project, Salta Province, Argentina,” and was prepared by Frederik Reidel, CPG, who is a qualified person independent of the Company under NI 43-101, with an effective date of April 30, 2023.