• Higher brine grades - 249 mg/L Design Basis
• DLE technology improvements
• New high-quality resource and reserve data

Lake Resources N.L. (ASX: LKE, OTC: LLKKF) has announced amendments to the Kachi Phase One DFS Addendum Investor Presentation released on 4 August 2025. The amendments include adding a footnote reference to the Exploration Target on Page 24 and adding Pages 38-41 in the Appendix regarding the Exploration Target. The DFS Addendum delivers significant project improvements, including higher brine grades (249 mg/L design basis), DLE technology improvements, new high-quality resource and reserve data, well development and construction efficiencies, and completed power supply FEED. The DFS Addendum results in a reduced Capex of US$1,157M, a reduced Opex of US$5,895/t, a pre-tax NPV10 of US$1.5B, and a pre-tax IRR of 22.5%. Key drivers of the DFS Addendum results include improved brine grades, transition to Lilac Gen4 Ion Exchange technology, reduced footprint and reagent use, and stronger project economics. The company has achieved significant milestones in 2023-2025, including completing the Kachi Phase One DFS, initiating a strategic partnering process, submitting the Environmental Impact Assessment, signing a Letter of Intent for power supply, and completing the DFS Addendum with Hatch Engineering.