Cameco Corporation is the world's largest publicly traded uranium

Uranium

Uranium is a silvery-white metallic chemical element in the actinide series of the periodic table, with atomic number 92. It is assigned the chemical symbol U. A uranium atom has 92 protons and 92 electrons, of which 6 are valence electrons...

 company, based in Saskatoon, Saskatchewan. In 2009, it was the world's second largest uranium producer, accounting for 16% of world production.
"Cameco - A Canadian Mining and Energy Corporation" was formed in 1988 by the merger and privatization of two crown corporations: the federally owned Eldorado Nuclear Limited

Eldorado Mining and Refining Limited

The Eldorado Mining and Refining Limited company was originally organized in 1927 as Eldorado Gold Mines Limited to develop a gold mine in Manitoba. Its president Gilbert LaBine later found radioactive deposits at Great Bear Lake, Northwest Territories in 1930, which led to the development of the...

 (known previously as Eldorado Mining and Refining Limited) and Saskatchewan-based Saskatchewan Mining Development Corporation

Saskatchewan Mining Development Corporation

The Saskatchewan Mining Development Corporation was a provincial crown corporation established in 1974 by the Government of Saskatchewan to manage the government's interests in exploration and mining in the province...

 (SMDC).