Greenstone Resources and Osisko Gold Royalties extended the maturity date for the repayment of outstanding indebtedness of Highland Copper’s $4.5 million credit agreement to June 30. The maturity date of the loan was previously extended from Feb. 28 to May 31.

Highland Copper is continuing its strategic review process with the support of its financial advisor, BMO Capital Markets.

Highland Copper is a Canadian company focused on exploring and developing copper projects in the Upper Peninsula of Michigan.