Highland Copper Announces Updated Process Plant Flow Sheet Demonstrating Increased Copper Recoveries of 87.6% and Reduced Processing Costs

(NYSE:HI) VANCOUVER, British Columbia, Sept. 04, 2025 (GLOBE NEWSWIRE) -- Highland Copper Company Inc. (TSXV: HI; OTCQB: HDRSF) (“Highland” or the “Company”) is pleased to announce positive results from its 2025 metallurgical test work program for the 100%-owned Copperwood Project (“Copperwood”), located in Michigan’s Upper Peninsula. The test work was conducted by Base Metallurgical Laboratories Ltd. (“Base Met Labs”) in Kamloops, British Columbia, with technical oversight provided by DRA Americas Inc. (“DRA”).