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 2025A Transformational Partnership is announced between Cameco, Brookfield and US Government $80 billion to construct new Westinghouse nuclear power reactorsLong-Term UF6 Supply Agreement signed with Slovenské elektrárneCameco and Orano Sign Historic 15-year Agreement with Indigenous-owned Rise AirCameco Gifts $10 million to USaskCameco joins Net Zero Nuclear as a strategic partner for 20252024Cameco Supports Boreal Healthcare Foundation with $1.5 million DonationCameco Named to TSX30 for 2024SaskPower, Westinghouse and Cameco Sign MOU to Explore Reactor and Fuel Supply Potential2023Net Zero Nuclear Announces Cameco as New Corporate PartnerCameco and Brookfield Complete Acquisition of Westinghouse Electric CompanyCameco Marks Uranium Supply Agreement with China Nuclear International CorporationCameco to Provide UF6 to Support Bulgaria’s Diversification EffortsCameco and Bruce Power Celebrate Extension of Long-Term Arrangements for Nuclear Fuel Through 2040Cameco to Receive Substantial Refund of $300 Million from Canada Revenue AgencyCameco and Energoatom Agree on Commercial Terms to Supply Ukraine’s Full Natural UF6 Needs through 20352022Cameco Produces First Packaged Pounds Following McArthur River/Key Lake RestartCameco Signs Uranium Supply Agreement with China Nuclear International CorporationCameco Announces Closing of US$747.6 Million Bought Deal Offering of Common SharesCameco and Brookfield Renewable Form Strategic Partnership to Acquire Westinghouse Electric CompanyCameco Announces US$650 Million Bought Deal Offering of Common SharesCameco Increases Ownership Stake in Cigar Lake Mine2021Cameco Sells Shares of UEX CorporationCameco Pleased as Supreme Court Dismisses CRA Leave to AppealCameco Increases Interest in Global Laser Enrichment2020Canada Revenue Agency Seeks Leave to Appeal Federal Court of Appeal DecisionCameco Pleased as Federal Court of Appeal Unanimously Upholds Tax Court DecisionMining Association of Canada recognizes Cameco with its “Towards Sustainable Mining” award for extraordinary environmental and community engagement achievementsCanadian Institute of Mining recognizes Cameco’s Cigar Lake Mine with it’s third consecutive John T. Ryan Regional Safety AwardCameco’s $250,000 COVID-19 Relief Fund Supports 35 Community Projects in OntarioCameco Restarting Production at Ontario Operations, Cigar Lake Status UnchangedCameco’s $1 million COVID-19 Relief Fund Supports 67 Community Projects in SaskatchewanCameco Extends Production Suspension at Cigar Lake Mine and Withdraws OutlookCameco Announces Temporary Operational Changes in OntarioCameco Responds to Announcement by KazatompromCameco Suspending Production at Cigar Lake Mine2019Arbitration Tribunal Rules in Favour of Cameco Inc. in TEPCO Contract DisputeCameco Pleased with Section 232 Decision on U.S. Uranium ImportsCameco Step Up for Mental Health raises $400,000 for 21 mental health projects in SaskatchewanCanadian Institute of Mining recognizes Cameco’s Cigar Lake Mine with John T. Ryan Regional Safety AwardTax Court of Canada Releases Decision on Cameco Cost Application2018Canada Revenue Agency appeals Tax Court of Canada decisionTax Court of Canada rules in favour of CamecoCameco suspends production at McArthur River/Key Lake indefinitelyCameco awarded contract for Bruce Power major component projectCameco's Board appoints new ChairJV Inkai Restructuring Takes Effect January 1, 20182017Cameco to suspend production from McArthur River and Key Lake Operations and reduce its dividendLac La Ronge Indian Band and Cameco Sign Collaboration AgreementCameco to Play Key Role in Bruce Power Life Extension ProgramCameco Announces Senior Management Changes and Election of DirectorsCameco Receives 10-year Operating License for Port Hope Conversion Facility from CNSCCameco Rejects TEPCO's Uranium Contract Termination Notice2016Athabasca Basin Communities Renew Partnership with the Uranium Mining IndustryCameco and Kazatomprom Sign Agreement to Restructure JV InkaiCameco Wins Third Consecutive National Mining Safety AwardCameco Announces Operational Changes in Saskatchewan and the United StatesNew Legacy Fund Shares Benefits from Uranium Mining with Northern CommunitiesCameco Named on Top 100 List for most Sustainable Corporations in the World2015Cigar Lake Achieves Production MilestoneCameco and Areva officially mark the grand opening of Cigar Lake on September 23rdCameco achieves commercial production at Cigar LakeMcArthur River recognized for exceptional safety performanceCameco announces contract with India2014Cameco recognized for outstanding safety performance.Cameco ends toll-conversion agreement with Springfields Fuels Ltd.Cameco announces start of ore production at Cigar Lake mine.Cameco announces agreement to sell its interest in Bruce Power.2013Neil McMillan named to succeed Victor J. Zaleschuk as chair of Cameco's board of directors.For the fourth consecutive year, Cameco is recognized as a top Canadian employer with multiple awards.Cigar Lake receives operating licence.Cameco starts production from North Butte uranium mine.2012Cameco announces the completion of the acquisition of the Yeelirrie uranium project in Western Australia.Cameco completes the agreement with AREVA Resources Canada Inc. (AREVA) to purchase AREVA's 27.94% interest in the Millennium project.Cameco announces it has signed an agreement with Advent International to purchase NUKEM Energy GmbH (NUKEM).Cameco announces breakthrough of second shaft at Cigar Lake2011Cameco announces that agreements have been signed with the owners of the Cigar Lake project and McClean Lake mill to process all Cigar Lake ore at McClean Lake.Tim Gitzel is appointed chief executive officer of Cameco.Cameco has signed two agreements to buy uranium produced at the Sotkamo nickel-zinc mine in eastern Finland owned by the Talvivaara Mining Company Plc. (LSE: TALV).2010Cameco signs two key uranium supply agreements with China Guangdong Nuclear Power and China Nuclear Energy Industry Corporation for a total commitment of 52 million pounds of uranium concentrate.Started the main processing plant at the Inkai minesite in Kazakhstan.McArthur River mine was awarded the John T. Ryan National Safety Trophy for the best safety performance in the metal mine category in 2009. The Cigar Lake project was also recognized with a Special Award Certificate for outstanding safety performance in 2009.Cameco has assisted in dismantling thousands of nuclear warheads through the "megatons to megawatts" program.2009Cameco announces completion of Centerra common share sale.Cameco completes its public offering of $500 million principal amount 5.67% Senior Unsecured Debentures, Series D.Cameco receives gross proceeds of approximately $460 million from bought deal public offering of common shares.2008Cameco acquires a 70% interest in the Kintyre uranium exploration project in Western Australia.Cameco enters the enrichment business through an agreement with GE Hitachi Nuclear Energy to acquire a 24% interest in Global Laser Enrichment.2007Cameco forms new strategic alliances with junior uranium companies to maximize opportunities to participate in development of new deposits, including Western Uranium Corporation.Cameco signs a non-binding memorandum of understanding with Kazatomprom to co-operate on the development of uranium conversion capacity and to pursue additional uranium production.2006Cameco acquires a 100% interest in Zircatec Precision Industries, Inc. Zircatec's primary business is manufacturing nuclear fuel bundles and other components for Candu reactors.Cameco's Crow Butte Resources and Smith Ranch-Highland operations both receive ISO 14001:2004 certification.Cameco announces a two-for-one share split.2005Cameco negotiates a toll-processing agreement with British Nuclear Fuels plc (BNFL) to secure 5 million kgU of additional conversion services from BNFL's Springfields plant in the United Kingdom.2004Cameco creates Centerra Gold and consolidates gold assets.Cameco announces development of uranium mine at Inkai, Kazakhstan.Cameco decides to proceed with construction of a new mine at Cigar Lake in northern Saskatchewan.Cameco announces a three-for-one share split and increases its annual cash dividend.2003Cameco receives ISO 14001 Certification for McArthur River and Cigar Lake.Gerald Grandey is appointed chief executive officer of Cameco.Cameco appoints Victor Zaleschuk as the new board chair.2002All of Cameco's common shares are publicly traded after the government of Saskatchewan sells its remaining 10% ownership in February.Cameco increases its stake in Bruce Power to 31.6%.2001Cameco expands its interest in the nuclear industry by acquiring 15% of Bruce Power, the limited partnership formed to lease the Bruce reactors in Ontario.Cameco announces that reserves at McArthur River increased by more than 50%.The McArthur River/Key Lake uranium operations achieve full production of 18 million pounds.2000The McArthur River mine achieves commercial production in November 2000 and becomes the world's largest high-grade uranium mine.1999Cameco signs an agreement for the purchase of natural uranium derived from highly enriched uranium (HEU) contained in dismantled Russian nuclear weapons.Cameco sells a 14% interest in McArthur River and 17% in Key Lake to Cogema Resources Inc. Cameco begins mining at McArthur River, the world's largest high-grade uranium mine.1998Cameco acquires Canadian-based Uranerz Exploration and Mining Limited and Uranerz U.S.A., Inc., increasing its reserves and resources and production levels by about 30%1997Kumtor gold operation in Kyrgyzstan, Central Asia, owned one-third by Cameco, achieves commercial production1996Cameco shares begin trading on the New York Stock ExchangeCameco Gold is formed as a subsidiary of Cameco to conduct the company's gold businessCameco purchases Power Resources, Inc., the largest uranium producer in the United States, increasing its reserves and resources by 10%.1991Cameco completes its initial public offering and shares begin trading on the Toronto and Montreal stock exchanges1990Cameco sells a one-third interest in the Rabbit Lake operation to Uranerz Exploration and Mining Limited in order to reduce debt.1988Cameco is created by the merger of two Crown corporations—Saskatchewan Mining Development Corporation and Eldorado Nuclear Limited. 

With operations on three continents, Cameco is proud to be an active and engaged member of the diverse communities in which we operate.We recognize the importance of sharing timely, local information about our operations, community investments and the opportunities Cameco can provide, with our neighbours around the world.Cameco Australia Australia, home to the world's largest known uranium reserves, is a big part of Cameco's plans for the future. We've been actively exploring for uranium in Australia since 1996 and are involved in several projects across the country, including two of Australia's largest undeveloped uranium deposits, Yeelirrie and Kintyre. Our Australian office is located in metropolitan Perth.Visit Cameco AustraliaCameco Fuel Services Cameco is a major supplier of uranium processing services required to produce fuel for the generation of clean electricity. Our fuel services division has three locations in Ontario: a refinery in Blind River, a conversion facility in Port Hope, and a fuel manufacturing operation with locations in Port Hope and Cobourg.Visit Cameco Fuel ServicesCameco North We're proud to call northern Saskatchewan the home of our largest operations, including our newest mine, Cigar Lake. Our people and partners here, many of whom are local residents, help maintain safe operations, protect the environment and establish strong, healthy community and business relationships.Visit Cameco NorthCameco Resources Cameco Resources is America's largest uranium producer. Our mines in Wyoming and Nebraska use an environmentally friendly in situ recovery mining process where uranium is extracted from wellfields, rather than open pits or underground shafts.Visit Cameco Resources

Cameco is a prominent supplier of uranium processing services required to produce fuel for the generation of clean electricity. We operate the world's largest commercial refinery in Blind River, have about 18% of the world UF6 primary conversion capacity in Port Hope, and are a leading manufacturer of fuel assemblies and reactor components for CANDU reactors at our facilities in Port Hope and Cobourg.Our focus is on cost-competitiveness and operational efficiency. Our fuel services segment is strategically important because it helps support the growth of the uranium segment. Offering a range of products and services to customers helps us broaden our business relationships and expand our uranium market share.

Performance TableBelow are the metrics that describe our ESG performance for the last three years. The reference column indicates the alignment of that specific metric with the Sustainability Accounting Standards Board (SASB) indicators. In instances where there is no SASB metric suggested, we include the corresponding reference to the metric suggested by the GRI standards. Note that in some cases a single metric aligns with both the SASB and GRI standards but only the SASB reference is noted.All references that start with EM-MM refer to SASB metrics for the Extractives & Minerals Processing Sector – Metals & Mining.We welcome feedback at sustainabledevelopment@cameco.com

Cameco is one of the largest global providers of the fuel needed to power a safe, secure energy future.Utilities around the world rely on our nuclear fuel products to generate safe, reliable, emissions-free nuclear power. Together, we are meeting the ever-increasing demand for clean, baseload electricity while delivering energy solutions to support the world's net-zero goals.Cameco's tier-one mining and milling operations have the licensed capacity to produce more than 30 million pounds (our share) of uranium concentrates annually, backed by more than 433 million pounds (our share) of proven and probable mineral reserves. We hold some of the world's most promising uranium projects and invest in ongoing exploration activities. We are also a leading supplier of uranium refining, conversion and fuel manufacturing services. Our ownership interests in Westinghouse and Global Laser Enrichment (GLE) further expand opportunities within the nuclear fuel cycle.Invested in the Nuclear Fuel Cycle Our LocationsOur geographically diverse uranium assets include a large portfolio of low-cost mining operations, extensive mineral reserves and resources, as well as exploration and development projects. 

We sell uranium and fuel services directly to nuclear utilities around the world as uranium concentrates, UO2 and UF6, conversion services, or fuel fabrication. We have a solid portfolio of long-term sales contracts that reflect the long-term, trusting relationships we have with our customers. We sell uranium and fuel services products to nuclear utilities in 16 countries.UraniumCustomers: 39 nuclear utilities worldwide38% of volume to Americas (US, Canada, Latin America)22% of volume to Asia40% of volume to Europefive largest customers account for 56% of commitmentsCommitments:As of December 31, 2025, we have executed contracts to sell about 230 million pounds of U3O8 with 39 customers worldwide in our uranium segment.  Uranium CustomersAmericas38Europe40Asia22Conversion – UF6Customers:33 nuclear utilities worldwide43% of volume to Americas (US, Canada, Latin America)9% of volume to Asia48% of volume to Europefive largest customers account for 53% of commitmentsCommitments:As of December 31, 2025, we have executed contracts to sell about 83 million kilograms as UF6 conversion with 33 customers worldwide in our fuel services segment. Conversion – UO2 and UO3Cameco is a leading supplier of uranium dioxide (UO2) used by the Canadian operators of CANDU heavy water reactors. Cameco provides intermediate fuel services product, uranium trioxide (UO3), through our Blind River refinery – the world's largest uranium refinery.Fuel ManufacturingCameco is one of two nuclear fuel manufacturers in Canada, and the largest Canadian-based supplier of reactor components to CANDU operators in Canada.Customers: utilities operating CANDU reactors Products:finished fuel for CANDU reactorsspecialty alloy products for various CANDU reactor applications Capacity:1.65 million KgU as UO2 pellets per year  Conversion CustomersAmericas43Europe48Asia9

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We will not necessarily update this information unless we are required to by securities laws.Examples of forward-looking information in this website include: our strategy for responding to market conditions; future annual uranium production, purchases and sales levels; our expectations about future global uranium supply, consumption, demand and the number of reactors; future production levels at our fuel services operations; our expectations regarding future spot prices and our uranium price sensitivity analysis; our expectations regarding our future capital requirements and expenditures; the future outlook for each of our operating segments and our consolidated future outlook; the terms and volumes to be covered by our current and future long-term delivery contracts; future royalty and tax payments and rates; our mineral reserve and resource estimates; our expectations regarding our 49% interest in Westinghouse; and our plans and expectations for uranium properties, projects under evaluation, and fuel services operating sites.The material risks that could cause actual results to vary include: we are adversely affected by changes in currency exchange rates, interest rates, royalty rates, or tax rates; 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we are impacted by changes in the regulation or public perception of the safety of nuclear power plants, which adversely affect the construction of new plants, the relicensing of existing plants and the demand for uranium; government regulations or policies that adversely affect us, including tax and trade laws and policies; our uranium suppliers fail to fulfil delivery commitments or our uranium purchasers fail to fulfil purchase commitments; our development, mining or production plans are delayed or do not succeed for any reason; Joint Venture Inkai LLP’s (JV Inkai) development, mining or production plans are delayed or do not succeed for any reason; our expectations relating to care and maintenance costs prove to be inaccurate; we are affected by natural phenomena, including inclement weather, fire, flood and earthquakes; our operations are disrupted due to problems with our own or our suppliers’ or customers’ facilities, the unavailability of reagents, equipment, operating parts and supplies critical to production, equipment failure, lack of tailings capacity, labour shortages, labour relations issues, strikes or lockouts, underground floods, cave-ins, ground movements, tailings dam failures, transportation disruptions or accidents, unanticipated consequences of our cost reduction strategies, or other development and operating risks; or that closing conditions for an acquisition or a disposition may not be satisfied in a timely manner, or at all, or the expected benefits from the Westinghouse acquisition.We have made material assumptions regarding: sales and purchase volumes and prices for uranium and fuel services, trade restrictions and that counterparties to our sales and purchase agreements will honour their commitments; the demand for and supply of uranium; spot prices and realized prices for uranium; the construction of new nuclear power plants and the relicensing of existing nuclear power plants not being more adversely affected than expected by changes in regulation or in the public perception of the safety of nuclear power plants; our ability to continue to supply our products and services in the expected quantities and at the expected times; production levels; costs, including production costs, purchase costs and the success of our cost reduction strategies; tax rates and payments, royalty rates, currency exchange rates and interest rates; 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Cameco is one of the largest global providers of the uranium fuel needed to power a safe, secure energy future.Our competitive position is based on our controlling ownership of the world’s largest high-grade reserves and low-cost operations, as well as significant investments across the nuclear fuel cycle, including ownership interests in Westinghouse Electric Company and Global Laser Enrichment. Utilities around the world rely on Cameco to provide global nuclear fuel solutions for the generation of safe, reliable, carbon-free nuclear power.We are proud to be one of Canada’s largest employers of Indigenous people, and our land holdings, including exploration, span about 1.8 million acres, the majority near our existing operations in northern Saskatchewan. Our head office is in Saskatoon, Saskatchewan, Canada.

Our Expertise  Cameco is a pure-play investment in the growing demand for nuclear energy. We provide nuclear fuel and nuclear power products, services, and technologies across the fuel cycle, augmented by our investment in Westinghouse, in support of the generation of carbon-free, reliable, secure, and affordable energy. Backed by more than 35 years of deep industry experience across the nuclear fuel cycle and set within the context of the transitioning market environment, our strategy is to capture full-cycle value through responsible production planning at our tier one brownfield assets, disciplined marketing activity and long-term contracting and prudent financial management.  Growing Demand   A growing focus on electrification and decarbonization; increasing populations; demands from the tech sector such as the generative AI revolution; and concerns about energy security and affordability are driving interest in nuclear power and a transition in the nuclear fuel market.  Increasingly, countries and companies around the globe are recognizing the critical role nuclear power is expected to play in providing carbon-free and secure baseload power, which was reaffirmed at the 30th Conference of Parties (COP30), with the declaration to triple nuclear energy capacity by 2050 now signed by 38 countries.   Supplying the World  Uranium supply and fuel cycle services are facing several risks: mine depletion, a decade of significant underinvestment, declining secondary supplies, global production shortfalls, supply chain and transportation limitations, and geopolitical challenges.  Uncertainty about where nuclear fuel supplies will come from to satisfy growing demand continues to drive long-term contracting activity as risk shifts from producers to utilities.  Focus on Sustainability   We take pride in our strong sustainable performance and we hold ourselves accountable for high quality and credible reporting on sustainability matters. For over 17 years, we have disclosed our performance through an extensive range of environment, safety, social, economic and governance indicators, guided by a suite of policies, programs and practices. We are striving to achieve a 30% absolute reduction in Cameco’s combined Scope 1 and 2 emissions by 2030 from 2015 levels as a milestone towards our longer-term net-zero ambition.  

Cameco can provide dynamic, rewarding career opportunities in the uranium mining, milling and fuel services industry.Our values guide our business decisions and we place a safe, healthy and rewarding workplace at the top of our key measures of success.We employ a highly diverse workforce here in Saskatchewan and around the world.Why Cameco?Because we aim to:Recruit the best people who will understand and share our vision and values and who can help us effectively carry out our mission.Manage talent in relation to business needs.Manage employees’ performance constructively so they can work to the best of their abilities.Establish clear responsibilities and accountabilities for every employee.Offer competitive compensation and benefits.Develop leadership skills at all levels that reflect our corporate values, competencies and behaviours.Recognize employee contributions.Encourage creativity and sharing of ideas.Promote and support continuous learning and career development.Provide a safe and healthy working environment that is free from harassment and discrimination.Promote and support healthy lifestyles.Promote an inclusive and diverse workplace and respect cultural traditions in communities where we operate.Provide flexibility to help employees balance work and personal commitments effectively.Provide transparent and consistent employee programs, standards and procedures.Respect our employees’ privacy.Total rewardsOur total rewards include everything from competitive salaries and variable compensation to flexible benefits, career development and retirement funding support.Learn moreOur cultureBeyond Cameco's total rewards programs, we actively support a culture of excellence and integrity which is demonstrated each and every day by our people around the world.Learn moreA diverse workforceAt Cameco, we appreciate the true value of a diverse workforce and we embrace, encourage and support an inclusive and barrier-free work environment.Learn more

We are a pure-play investment in the growing demand for nuclear energy, focused on taking advantage of the growth occurring in our industry. We have a proven track record of securely and reliably providing nuclear fuel supplies to a global customer base to generate safe, secure, carbon-free and affordable baseload electricity. Our operations span the nuclear fuel cycle from exploration to fuel services, which include uranium production, refining, UO2 and UF6 conversion services and CANDU fuel manufacturing for heavy water reactors. We have further enhanced our ability to meet growing demand with our investment in Westinghouse Electric Company (Westinghouse) which augments our core business and provides fuel fabrication, maintenance, design and engineering for light water reactors. Our investment in Global Laser Enrichment’s third-generation enrichment technology, if successful, will allow us to participate in the entire nuclear fuel value chain.