Announcement • Sep 10

E3 Lithium Announces Clearwater Project Selection for Canada Investment Summit Prospectus and Provides Project Development Update

E3 Lithium announced that its Clearwater Project has been selected for inclusion in the Canada Investment Summit Prospectus, a curated portfolio of investment-ready Canadian projects presented to global institutional investors, strategic partners and allied governments. The Canada Investment Summit is being hosted by Canadian Prime Minister, Mark Carney, in partnership with Canada Pension Plan Investment Board and Public Sector Pension Investment Board in Toronto, Ontario, on September 14 and 15, 2026. Inclusion in the Prospectus is by selection only and reflects the technical maturity, strategic value, and investment-readiness of the selected projects. E3’s Clearwater Project’s inclusion reflects its combination of scale, technical maturity, infrastructure access, and jurisdictional advantages that few lithium projects possess simultaneously, anywhere in the world. The Clearwater Project sits within Alberta’s Bashaw District, where E3 has defined 16.2 million tonnes of lithium carbonate equivalent (LCE) Measured and Indicated mineral resource, one of the largest lithium resource endowments in North America. The Company is progressing development of Stage 1 of the Project with a capacity of 12,000 tonnes per year of lithium carbonate with the resource and brine volume to support significant increases in production. E3’s Clearwater Project will produce battery ready products in Alberta, without the need for additional refining. The Front-End Engineering and Design (FEED) for the first of many facilities is underway, building on E3’s Pre-Feasibility Study completed in 2024, which confirmed Canada’s first proven and probable lithium brine reserve with an after-tax NPV(8%) of USD 3,700 million. Operating the only lithium carbonate demonstration facility in Canada, E3 is currently proving the process at increasing scale. The Clearwater Project is transitioning a historic producing asset; it leverages Alberta’s existing energy infrastructure, including roads, power, wellbore data, and an experienced workforce. Alberta provides a single, established regulator and a century of operating precedent; a materially different risk profile than greenfield lithium development in most other jurisdictions. The Company has made significant advancement in moving the Project from a concept, to resource and reserves identification, building and operating a Demonstration Facility, producing battery-grade lithium carbonate, submitting the Central Processing Facility permit application, and advancing its Feasibility Study as it progresses toward Final Investment Decision. E3 Lithium is a development company with a total of 21.2 million tonnes (Mt) of lithium carbonate equivalent (LCE) Measured and Indicated mineral resources as well as 0.3 Mt LCE Inferred mineral resources in Alberta, comprised of (a) Measured and Indicated mineral resources of 16.2 Mt LCE at a lithium grade of 75.5 mg/L within its Clearwater Project and (b) Measured and Indicated mineral resources of 5.0 Mt LCE at a lithium grade of 54.0 mg/L and Inferred mineral resources of 0.3 Mt LCE at a lithium grade of 42 mg/L within its Garrington District. The Clearwater Pre-Feasibility Study outlined a 1.13 Mt LCE proven and probable mineral reserve at a lithium grade of 75.5 mg/L, with a pre-tax NPV(8%) of USD 5,200 million with a 29.2% IRR and an after-tax NPV(8%) of USD 3,700 million with a 24.6% IRR.

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