Northisle Reports Additional Results from 2025 Drilling at West Goodspeed at its North Island Project

Vancouver, B.C.– Northisle Copper and Gold Inc. (TSX-V: NCX, OTCQX: NTCPF) (“Northisle” or the “Company”) is pleased to announce additional results from its 2025 exploration campaign, comprised of six additional holes from the West Goodspeed target. These results continue to demonstrate wide intervals of mineralization near surface and contribute additional high-grade intervals at depth. Additional drilling during 2025 has been completed, testing areas to the northwest of West Goodspeed, and at other targets on the property. Sam Lee, President and CEO stated “We continue to be encouraged by the results to date from West Goodspeed. These results continue to demonstrate continuity of good grades and provided us the confidence to step out further to the northwest at West Goodspeed. We have confirmed mineralization over a corridor spanning more than 1,000m in strike length with only 50% of results received from exploration drilling in the West Goodspeed-Red Dog mineralized corridor.”