Trilogy Metals Completes 2026 Summer Field Program At Upper Kobuk Mineral Projects In Northwestern Alaska's Ambler Mining District

Trilogy Metals Inc. (NYSE:TMQ) (TSX:TMQ) ("Trilogy Metals", "Trilogy" or the "Company") announced today the successful completion of the 2026 summer field program at the Upper Kobuk Mineral Projects ("UKMP") in northwestern Alaska's Ambler Mining District, with all priority objectives for the season achieved.

Highlights

• 2026 Field Program Completed with All 42 Planned Geotechnical, Hydrogeological, Condemnation and Exploration Holes Drilled Over Approximately 5,200 Meters
• Target Assessments and Advanced Mapping Completed for District-Wide Exploration Drilling Along 100-Kilometer Volcanogenic Massive Sulfide ("VMS") Belt
• David Thomas Appointed Senior Vice President of Project Development of Ambler Metals to Lead Engineering and Development of the Arctic Project

The UKMP asset portfolio, which encompasses approximately 190,929 hectares and hosts both the high-grade Arctic polymetallic deposit (the "Arctic Project" or "Arctic") and the Bornite copper-cobalt deposit (the "Bornite Project" or "Bornite"), is being advanced by Ambler Metals LLC ("Ambler Metals"). Ambler Metals is a 50/50 joint venture operating company equally owned by Trilogy and South32 Limited ((ASX, LSE, JSE: S32, OTC:SOUHY) ("South32"). Arctic is one of the highest-grade, undeveloped open-pittable copper deposits in the world, with an estimated average grade of approximately 5% copper equivalent, bolstered by material precious metals by-product credits.