Trilogy Metals Inc. (NYSE American: TMQ) (TSX: TMQ) Positioned to Benefit from Updated Critical Minerals List with Progress on Ambler Road in Alaska

Disseminated on behalf of Trilogy Metals Inc. (NYSE American: TMQ) (TSX: TMQ) and may include paid advertising.

• Trilogy Metals’ polymetallic assets in the Ambler Mining District contain copper alongside several other minerals now designated as critical
• The US critical minerals list plays a key role in shaping policy on securing materials vital for manufacturing, technology, defense and infrastructure
• The updated list coincides with important developments in Trilogy Metals’ flagship projects

The US Geological Survey’s (“USGS”) newly finalized 2025 List of Critical Minerals marks a notable shift in federal resource policy by formally adding copper to the roster of materials considered essential to the country’s economic resilience and national security. The inclusion of copper carries meaningful implications for companies advancing US-based copper projects, including Trilogy Metals (NYSE American: TMQ) (TSX: TMQ), whose polymetallic assets in Alaska’s Ambler Mining District contain copper alongside several other minerals now designated as critical.

The USGS list identifies minerals that are essential to US economic growth and national security and vulnerable to supply chain disruptions. The list helps guide federal strategies aimed at strengthening domestic supply chains, supporting manufacturing and reducing reliance on foreign sources for strategically important materials.

In November, the Department of the Interior, through the USGS, published the final 2025 list. The updated list adds 10 new minerals, including copper, boron, lead, metallurgical coal, phosphate, potash, rhenium, silicon, silver and uranium. The list was developed based on updated data, interagency recommendations and public feedback.

Critical mineral lists such as this one play a key role in shaping US policy on securing materials vital for manufacturing, technology, defense and infrastructure. By identifying minerals with supply chain vulnerabilities, the USGS list helps prioritize federal actions that can include direct investments, tax incentives for mineral processing, and streamlined mining permits designed to bolster domestic production and reduce reliance on foreign sources. The addition of copper, in particular, reflects the mineral’s central role in electrification, given its widespread use in power grid and data center infrastructure.

A mineral’s inclusion on the USGS Critical Minerals List streamlines permitting by qualifying projects for accelerated reviews under programs like FAST-41, providing federal support, coordinating agency reviews, setting clear timetables, and making them eligible for financial incentives.

Similarly, critical mineral status can enhance eligibility for federal funding and partnership programs. The Biden and Trump administrations have both used executive actions and federal investments to strengthen domestic supply chains for strategic materials, including funding research, processing capacity and workforce development. By formally recognizing copper as critical, the 2025 list reinforces the metal’s importance in national policy discussions and underscores why investment in domestic exploration and production is increasingly a priority for federal agencies and allied stakeholders.

For Trilogy Metals, the updated list coincides with important developments in its flagship projects. The Ambler Mining District in northwestern Alaska, where Trilogy is advancing its Upper Kobuk Mineral Projects through a 50/50 joint venture with South32, hosts deposits rich in copper and other critical minerals. These polymetallic volcanogenic massive sulphide (“VMS”) deposits include not only copper but also zinc, lead, gold, silver and cobalt, many of which appear on the 2025 critical minerals list. Bornite and Arctic, the two principal deposits, host significant copper and base metal mineralization that Trilogy and its partners are working to develop.

The presence of copper and other critical metals in the Ambler Mining District aligns with the expanded federal focus on supply chain security. In late 2025, the US government announced a strategic investment of approximately $35.6 million in Trilogy Metals for a 10% ownership stake, underscoring federal interest in unlocking Alaska’s mineral resources. This investment, tied to broader infrastructure and access initiatives including permitting for the Ambler access road, signals how critical mineral policy and federal support can intersect with private sector project development.

Trilogy’s focus on copper is complemented by its exposure to other minerals on the critical minerals list. The polymetallic nature of the deposits in Alaska’s Ambler Mining District positions the company to benefit from diversified demand across multiple supply chains, including electrification, energy, and battery technologies. While zinc, lead, and cobalt have long been important base metals, increased risk to their supply further strengthens the rationale for developing domestic sources. For Trilogy Metals, the inclusion of copper on the 2025 critical minerals list reaffirms the potential value of its projects and may help catalyze support from policymakers, investors and industry partners as it advances exploration and development in the district.

For more information, visit www.TrilogyMetals.com.

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