CENTURY LITHIUM HIGHLIGHTS RARE EARTH POTENTIAL AT ANGEL ISLAND, NEVADA

Testing using the Company’s patent-pending chloride-based process combined with targeted ion-exchange demonstrated both potentially significant levels of REEs in solution and exceptionally high recoveries of REEs in ion-exchange. These results reinforce the opportunity for REEs to become a strategically important by-product alongside Angel Island’s primary commodity, lithium carbonate and secondary revenue stream from the sales of sodium hydroxide.

“We are very encouraged by these findings,” stated Bill Willoughby, President and CEO of Century Lithium. “From assays, the claystone sample used for testing contained 0.024% total rare earth oxides (“TREO”). Our ability to recover these elements efficiently from solution and in parallel with lithium is a significant accomplishment by our team. At the scale of our planned operations, these levels of REE would contribute meaningfully to North America’s critical mineral supply chain and revenue streams from Angel Island.”

The test work on the REEs was conducted using material taken from the 500-tonne bulk sample collected from Angel Island. The results listed below are representative of the bulk sample and should not be assumed representative of the Angel Island lithium claystone deposit as a whole.

The claystone material assayed 1101 ppm lithium and 239 ppm (0.024%) TREO. The REE distribution of the sample consists of approximately 75% light rare earth elements and 25% yttrium and heavy rare earth elements. Chloride leaching of the sample yielded solution concentrations of 210 mg/l lithium and 36 mg/l TREO, indicating that the REEs enter solution under the same conditions as used for lithium extraction.

Two ion-exchange media were tested for recovery of REEs from the pregnant leach solution. Both media demonstrated high recovery of all REEs and yttrium. The table below summarizes the feed value, concentrations in the leach solution, and final IX recovery for selected elements.

* All elements with the exception of lithium reported as oxides.

Note: Representative samples for solids and liquids were delivered to ALS Canada Ltd. In Reno, Nevada, and analyses performed at their independent ISO/IEC 17035 accredited laboratory in Vancouver, B.C., using methods ME-MS14 and ME-ICP-15 on liquids and ME-MS61L with REE add-on for solids. Quality control in the form of duplicates, standards and blanks was provided by the laboratory.

Globally, a significant amount of REE production comes from deposits that are large-scale and relatively low grade. Ion-adsorption clay deposits in southern China and Southeast Asia, for example, are long the world’s dominant source of heavy rare earths and operate at 0.03–0.15% TREO. In the U.S., primary REE projects in Wyoming and Texas are under development with grades between 0.05% and 0.20% TREO. Together these illustrate that such deposits can achieve technical and strategic significance when supported by efficient extraction methods and substantial tonnage, underscoring the potential relevance of Angel Island’s REE content as a by-product within a large-scale lithium operation.

Angel Island is expected to process 2.75 to 5.5 million tonnes of claystone annually across the Project’s planned Phase 1 and Phase 2, generating 10 to 20 million tonnes of leach solution per year. At this scale, modest REE concentrations translate into strategically important quantities.

Century Lithium is not yet evaluating the economic contribution of REE recovery, as further reserve definition and metallurgical testing are required before such analysis is appropriate. But these results on REE recovery show Angel Island’s strategic relevance to domestic critical-mineral supply, highlight a potential additional revenue source for the Company, and demonstrate the value of Century Lithium’s processing technology. The Company remains fully committed to completing the updated feasibility study and advancing permitting for Angel Island, critical milestones that will drive Angel Island toward development.

Qualified Person

Todd Fayram, MMSA-QP and Senior Vice President, Metallurgy of Century Lithium is the qualified person as defined by National Instrument 43-101 and has approved the technical information in this release.

ABOUT CENTURY LITHIUM CORP.

Century Lithium Corp. is an advanced-stage lithium company, focused on developing its 100%-owned lithium project Angel Island in Esmeralda County, Nevada, which hosts one of the largest sedimentary lithium deposits in the United States. The Company has utilized its patent-pending process for chloride leaching combined with direct lithium extraction to make battery-grade lithium carbonate. As part of the Company’s chlor-alkali process, the planned sale of surplus sodium hydroxide produced at Angel Island is expected to contribute meaningfully to maintaining competitive operating costs for lithium carbonate production.

Angel Island is one of the few advanced lithium projects in development in the United States to provide an end-to-end process to produce battery-grade lithium carbonate for the growing electric vehicle and battery storage market. Angel Island is currently in the permitting stage for a three-phase feasibility-level production plan, expected to yield an estimated life-of-mine average of 34,000 tonnes per year of lithium carbonate over a 40-year mine-life.