In October 2000, Rio Algom was acquired outright by Billiton plc of London, which a year later merged with the Broken Hill Proprietary Company (BHP) of Sydney.

[1] It got ownership of a uranium mill in the Ambrosia Lake region of New Mexico when it purchased the Quivira Mining Corporation from Kerr-McGee in 1989.

[2][3][4] The 2017 performance of Rio Algom, who own nine decommissioned uranium mines at Elliot Lake, was described as "below expectations" by the Canadian Nuclear Safety Commission.

[5] The commission reported radium releases above limits at the Stanleigh effluent treatment plant, prompting engineering work plus increased site monitoring by Rio Algom.

[5] Rio Algom bought the Quivira Mining Corporation (a subsidiary of Kerr-McGee) in 1989.