Trilogy Metals Reaches Key Milestone as Arctic Project Enters Federal Permitting

Trilogy Metals Inc. (NYSE American: TMQ) (TSX: TMQ) has reached a significant milestone at its flagship Arctic Project in Alaska's Ambler Mining District, as domestic copper demand climbs on the back of electrification, grid expansion, data center development, and defense applications. On April 21, 2026, the company announced that Ambler Metals LLC, its 50/50 joint venture with South32 Limited, has officially commenced federal permitting for the Arctic Project, one of the highest-grade undeveloped open-pittable copper deposits in the world.

According to a recent article, most operating copper mines globally produce ore grading between 0.4% and 0.7% copper. Arctic's estimated average grade of approximately 5% copper equivalent puts it in a completely different category. The deposit is open-pittable and polymetallic, containing copper, zinc, lead, gold, and silver, with meaningful precious-metals byproduct credits that strengthen project economics. That combination matters because grade often determines whether a project remains viable when capital costs, inflation, and permitting delays begin to pressure margins.

The Arctic Project is part of the Upper Kobuk Mineral Projects (UKMP) in northwestern Alaska, which host world-class polymetallic volcanogenic massive sulphide (VMS) deposits and carbonate replacement deposits. Ambler Metals has an agreement with NANA Regional Corporation, Inc., an Alaska Native Corporation that provides a framework for the exploration and potential development of the Ambler Mining District in cooperation with local communities.

The commencement of federal permitting marks a critical step toward advancing the project, which could become a key domestic source of copper and other critical minerals. The United States relies heavily on imported copper, and the Arctic Project's high grade and polymetallic nature could help reduce that dependency. The project also benefits from existing infrastructure and community support, which may streamline the permitting process.

Trilogy Metals holds a 50% interest in Ambler Metals LLC, which has a 100% interest in the UKMP. South32, a globally diversified mining and metals company, exercised its option to form the 50/50 joint venture on December 19, 2019. Exploration efforts have focused on two deposits: the Arctic VMS deposit and the Bornite carbonate replacement deposit. Both are located within a land package spanning approximately 190,929 hectares.

The milestone comes at a time when copper demand is expected to grow substantially due to the energy transition and technological advancements. The Arctic Project's high grade and polymetallic nature could make it one of the most economically attractive undeveloped copper projects globally, potentially attracting further investment and accelerating development timelines.

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