Investor Presentaiton

Exploration Focused on the most prospective trends in the Athabasca Basin Cameco Energizing a clean-alr world Alberta Cameco/Joint Venture Exploration Project 417 Saskatchewan * Cameco/Joint Venture Prospect/Deposit Cameco Operation ATHABASCA BASIN Manitoba Millennium Deposit Rabbit Lake Operation (C&M) Cigar Lake Mine Significant land position • 650,000 hectares of Cameco and JV-operated properties History of exploration success ⚫ Uranium prospects and undeveloped deposits on dozens of projects Infrastructure support McArthur River Mine/ Key Lake Mill • Existing mines and mills provide logistical and economic advantages Nuclear Fuel Cycle Much more than mining AA LIGHT WATER REACTORS >>> CONVERSION OF UO, to UF ENRICHMENT OF UF Clobal Laser Enrichment In develcement EXPLORATION MINING MILLING OF USO Cameco explores, mines and mills in Saskatchewan, the USA, Australia and Kasakutan REFINING USO Blind River Refining Facility World's largest commercial wanium refinery CONVERSION Port Hope Conversion Facility Canada's only uranium comersion facility CAMECO CAMECO INVESTMENTS HEAVY WATER REACTORS (CANDU) >>> DOO CONVERSION OF ENRICHED UF into UO Cameco Energizing a clean-air world First Quarter 2024 33 FUEL FABRICATION LIGHT WATER REACTORS SPENT FUEL STORAGE Westinghouse (f) ENERGY GRID Useable clean energy that powers homes, hospitals and businesses CONVERSION OF UO, to UO₂ FUEL FABRICATION Port Hope & Cobourg Fuel Manufacturing Facilities Manufactures reactor components and fuel bundles for CANDU reactors CANDU REACTORS SPENT FUEL STORAGE First Quarter 2024 34 19

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