Cameco resumes full production at McArthur River and Key Lake operations

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Cameco Announces McArthur River/Key Lake Operation Resumes Production

May 27, 2026 5:15 PM EDT

All amounts in Canadian dollars unless specified otherwise

SASKATOON, Saskatchewan--(BUSINESS WIRE)-- Cameco (TSX: CCO; NYSE: CCJ) today announced that the Key Lake mill and McArthur River mine have returned to full production activities following a disruption caused by flooding in northern Saskatchewan. Our 2026 consolidated production outlook remains unchanged.

On May 10, 2026, Cameco announced that Key Lake had temporarily halted production activities and McArthur River had reduced activities due to the impact of flooding in northern Saskatchewan. While our northern Saskatchewan sites were not directly... More