Canada’s top court has ruled that investors can sue Vancouver-based Lundin Mining Corp. for failing to disclose that a rockslide took place at one of its mines in Chile, affirming when public companies must share information with shareholders.

The Supreme Court of Canada on Friday set aside a lower court’s interpretation that narrowly defined “material information,” which would have prevented the investors from bringing a class action against Lundin alleging that the company waited too long to tell them about the rockslide.

In 2017, Lundin detected pit wall instability in part of its open pit mine at its Candelaria copper mine in Chile. A few days later, on Oct. 31, as much as 700,000 metric tons of waste material fell in the mine. Lundin disclosed the event on Nov. 29, cutting its 201

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