Independent Proxy Advisory Firms, ISS and Glass Lewis, Support Hudbay's Plan of Arrangement with Copper Mountain and Recommend Shareholders Vote "FOR"

TORONTO, June 2, 2023 /PRNewswire/ - Hudbay Minerals Inc. ("Hudbay" or the "company") (TSX:HBM.TO) (NYSE:HBM) and Copper Mountain Mining Corporation ("Copper Mountain") (TSX:CMMC.TO) (AMEX:C6C) are pleased to announce that Institutional Shareholder Services Inc. ("ISS") and Glass, Lewis & Co., LLC ("Glass Lewis"), have recommended that shareholders vote FOR the previously announced transaction whereby Hudbay will acquire all of the issued and outstanding common shares of Copper Mountain pursuant to a court approved plan of arrangement under the Business Corporations Act (British Columbia) (the "Transaction").