Largest Uranium Mining Companies & Producers by Market Cap

KazAtomProm, Kazakhstan’s national uranium operator listed on the London Stock Exchange and Astana International Exchange, is the world’s largest uranium producer by a wide margin. Kazakhstan alone consistently supplies over 40% of the world’s mined uranium, thanks to extensive use of in-situ recovery (ISR) mining across its vast deposits.

Uranium has been used as a concentrated energy source for more than 60 years, primarily as fuel for nuclear power plants. It contributes roughly 10% of the world’s electricity. About three-quarters of global uranium production comes from just three countries: Kazakhstan, Canada, and Namibia. Australia holds the largest known reserves — roughly 24% of the planet’s total — though about 96% of all reserves are concentrated in ten countries.

The major publicly traded uranium companies span mining, development, fuel supply, and enrichment:

• KazAtomProm (KAP) — Kazakhstan’s state-owned uranium giant, listed on the LSE and AIX
• Cameco Corporation (CCJ) — Canadian full nuclear fuel cycle provider, owner of the McArthur River mine and Key Lake mill, listed on the TSX and NYSE
• Uranium Energy Corp (UEC) — a US-based ISR uranium company with production-ready projects in Wyoming and South Texas
• NexGen Energy (NXE) — Canadian developer focused on the Rook I project in the Athabasca Basin, listed on the TSX and NYSE
• Energy Fuels (UUUU/EFR) — American producer operating the only conventional uranium mill in the United States
• BHP Group (BHP) — Australian mining major that produces uranium as a by-product at Olympic Dam, one of the world’s largest uranium deposits

Cameco expanded beyond mining by completing the purchase of Westinghouse Electric Company — a leading provider of nuclear power plant services and technologies — in partnership with Brookfield Renewable Partners and Brookfield Asset Management. Centrus Energy (LEU) represents a different part of the fuel chain, specializing in uranium enrichment and fuel supply rather than extraction. For those interested in fund-based exposure, see the list of uranium ETFs.

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The table below ranks the largest uranium mining companies and uranium producers by market capitalization. It includes only publicly traded uranium companies, and the data — price, market cap, and performance — is updated regularly to reflect current market conditions.