osisko mining inc said thursday that has received approval from the toronto stock exchange to purchase up to 287 million of its common shares for cancellation the canadian mineral exploration company said the approval is for a normal course issuer bid and that the company can acquire the shares throughout the course of a oneyear period starting on jan 2 2022 osisko said it will purchase the shares on the open market at prevailing market prices at wednesdays closing price of 372 canadian dollars a share the equivalent of us291 the shares for purchase are worth around c1067 million