Investor Presentaiton

Environment, Social, Governance ESG integrated into all aspects of our business Cameco Energizing a clean-air world To support achieving our 2030 GHG emissions reduction target, we implemented a 2003 compensable target to create tailored decarbonization pathways for each operationally controlled site. We completed cimate change scenario analyses to understand how projected long- term changing climate conditions could impact our employees, assets, and operations in northern Saskatchewan and Ontario, Canada Clean Environment Environment Safe, healthy, and rewarding workplace ESG Governance dale Social Supportive Communities To support our commitment to climate action we joined the Net Zero Nuclear initiative, which calls for collaboration among government, industry leaders and civil society to triple global nuclear capacity to achieve carbon neutrality by 2050. Cameco's board of directors has appointed Chief Tammy Cook Searson and Dominique Minière as board members who will serve on Cameco's Safety, Health, and Environment Committee of the board, which holds oversight for our ESG matters 100% of our product goes to producing clean, carbon-free, base-load electricity Learn more > www.cameco.com/esg First Quarter 2024 23 Our locations Global presence across the fuel cycle Caneco Corporate Headquarters "Seth Ranch Cigar Lake Mine McArthur River Minel Milenium Project Key Lake Mi Rabbit Lake Opin CANADA Highland Operation Crow Butte Operation Columbia Cameco Exploration Cameco Exploration Projects Cameco Fuel Services Cameco HQ Cameco Uranium Operations Global Laser Enrichment Westinghouse HQ Westinghouse Fabrication & Operations CLE Blind River Refinery Port Hope Conversion Facility Cameco Fas Manufacturing Westinghouse Corporate Headquarters Springfields Visteris Nika Operation CAZAD Cameco Energizing a clean-air world Kintyre Project 0 Yoelie Project First Quarter 2024 24 14

View entire presentation