Announcement PDF T +61 (8) 6313 3936 E info@prairielithium.com ASX: PL9 OTC: PLIXF Level 2, 10 Outram Street West Perth WA 6005 Australia ASX Announcement 15 September 2026 PRAIRIE LITHIUM PROJECT SELECTED FOR CANADA INVESTMENT SUMMIT HIGHLIGHTS • Prairie Lithium has been selected to actively participate in The Canada Investment Summit, to be held in Toronto, Ontario, on 14–15 September 2026. • Hosted by Prime Minister Mark Carney, The Canada Investment Summit is a first-of-its-kind investment forum in Canada, bringing together global institutional investors and leading Canadian projects to facilitate investment in key Canadian projects. • Canada ranks #1 among G7 nations for banking stability and has established an ambitious plan to accelerate $1 trillion in total investment in Canada over the next five years. • Prairie Lithium’s active participation at the Summit and associated events includes: o Featured promotion of the Prairie Project as one of Canada’s leading investment opportunities in the Federal Government’s investment prospectus (the “Prospectus”); o Participation by Zach Maurer, Executive Director of Prairie Lithium, in panel & roundtable discussions; and o Meetings with strategic and institutional investors to discuss investment and partnership opportunities. Prairie Limited (ASX: PL9, OTC: PLIXF) (“Prairie Lithium”, “PL9” or “the Company”), a company focused on the sustainable development of the Prairie Lithium Project (“Prairie”), is pleased to announce that the Prairie Project has been selected for inclusion in the Canada Investment Summit Prospectus (the “Prospectus”). The Prospectus is a curated portfolio of investment-ready Canadian projects being presented to global investors at the 2026 Canada Investment Summit, to be held in Toronto, Ontario, on 14–15 September 2026. The Canada Investment Summit is intended to facilitate investment between global institutional investors and leading Canadian projects and supports the Government of Canada’s broader objectives of attracting long- term capital, strengthening domestic supply chains and supporting economic growth. The Government of Canada has established an ambitious plan to accelerate $1 trillion in total investment in Canada over the next five years. Prairie Project Recognised in Federal Government Investment Prospectus The inclusion of the Prairie Project in the Prospectus follows the achievement of several significant milestones by the Prairie Lithium team, including: • Canada’s first and only lithium brine facility approved for commercial-scale production; • Arrival of North America’s largest Direct Lithium Extraction (DLE) unit; and • Execution of a strategic offtake agreement between Prairie Lithium and Hydro Lithium. The Prairie Project’s inclusion in the Prospectus further underscores its strategic importance to Canada’s emerging critical minerals and battery supply chain and provides Prairie Lithium with a high-profile platform to engage with global institutional and strategic investors. Level 2, 10 Outram Street West Perth WA 6005 Australia T +61 (8) 6313 3936 E info@prairielithium.com ASX: PL9 OTC: PLIXF Figure 1: (L-R) Jeremy Harrison (Minister for of Crown Investments Corporation), Scott Moe (Premier), Zach Maurer (Executive Director of Prairie Lithium), David Marit (Minister of Agriculture) participating in the Canada Investment Summit Prairie Lithium Executive Chairman, Paul Lloyd, commented: “The selection of the Prairie Project for inclusion in the Canada Investment Summit Prospectus is recognition of the significant progress achieved by the Prairie Lithium team and the Project’s strategic relevance to Canada’s emerging lithium and critical minerals supply chain. The Prairie Project has achieved several important milestones, including becoming Canada’s first and only lithium brine facility approved for commercial-scale production, the arrival of North America’s largest Direct Lithium Extraction unit, and the execution of a strategic offtake agreement with Hydro Lithium. The Summit provides Prairie Lithium with an important opportunity to showcase the Prairie Project to a global audience of institutional and strategic investors and to advance discussions around potential investment and strategic partnerships” About the Prairie Lithium Project PL9’s Prairie Lithium Project in Saskatchewan, Canada, is in one of the world’s top mining friendly jurisdictions. The project has easy access to key infrastructure including electricity, natural gas, fresh water, paved highways and railroads. This ASX announcement is authorised for release by the Board. For further information please contact: Mr. Paul Lloyd Executive Chairman Tel. +61 419 945 395 paul@prairielithium.com