The public uranium equity universe has grown to $99 billion in combined market capitalization across 35 tracked companies, according to data published by Green Stocks Research and updated August 8, 2026. The list spans the full nuclear fuel value chain, including producers, developers, explorers, royalty companies and physical uranium investment vehicles.
Cameco Corporation remains the dominant player, accounting for roughly 43 percent of the group's combined market value. Together with the next two largest constituents, the top three companies represent nearly 70 percent of total market capitalization across the sector.
NexGen Energy stands out as the third largest company on the list, carrying a market value of more than $6 billion despite not yet producing a single pound of uranium. The company's valuation rests on its Rook I project in the Athabasca Basin, a Canadian region long recognized for hosting some of the highest grade uranium deposits in the world. Ten of the 35 tracked companies hold projects in the Athabasca Basin.
Two companies on the list, Sprott Physical Uranium Trust and Yellow Cake, do not mine uranium at all. Instead, they hold physical drums of U3O8, the concentrated form of uranium oxide known as yellowcake, with combined holdings valued at about $7.7 billion.
The list also shows geographic diversification beyond North America, with nine constituents holding projects across Africa, including Namibia, Niger, Zambia, Malawi and Mauritania. Namibia alone hosts five of those projects. The scale of capital now tied to uranium mining and holding vehicles reflects continued institutional interest in the sector tied to nuclear power demand.
Source: Green Stocks Research - https://greenstocksresearch.com/uranium-stocks/