Building the Future of U.S. Mineral Independence: Trilogy Metals Inc. (NYSE American: TMQ) (TSX: TMQ) Highlights Vast Resource Potential at Alaska’s Ambler Mining District

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

• The Ambler Mining District is one of the last underexplored volcanogenic massive sulphide belts in North America, with only ~200,000 meters drilled along a 100 km trend
• Recent federal decisions, including a Trump-era presidential decree, have de-risked the Ambler Access Road that leads to the district, positioning the Arctic and Bornite projects for development
• Trilogy Metals is working to advance a district-scale opportunity comparable to historic mining camps like Noranda and Flin Flon

America’s Growing Need for Domestic Copper Supply

As global demand for mineral independence accelerates, the U.S. faces a widening supply gap just as electrification, national security, and energy transition priorities intensify. The world’s largest copper producers are increasingly concentrated outside North America, raising concerns about long-term supply reliability. With policymakers emphasizing reshoring of critical minerals, attention is turning to districts with the potential to anchor multi-decade domestic production. Alaska’s Ambler Mining District stands out as one of the most compelling opportunities.

Trilogy Metals: Advancing Rare District-Scale Opportunity

Trilogy Metals (NYSE American: TMQ) (TSX: TMQ) is exploring some of the most prospective ground in Alaska’s Ambler Mining District, a region host to world-class copper-rich volcanogenic massive sulfide (“VMS”) deposits. Through Ambler Metals, a joint venture with South32, the company is advancing two cornerstone assets: the Arctic copper-zinc-lead-silver-gold deposit and the large-scale Bornite copper-cobalt deposit.

What distinguishes Trilogy is not simply these two deposits, but the broader district-scale upside. In a recent interview at the Zurich Precious Metals Summit, Trilogy President and CEO Tony Giardini emphasized that the Ambler Mining District has geological characteristics similar to legendary North American mining camps such as Noranda and Flin Flon. Those districts became globally significant mining centers because once access infrastructure was built, exploration accelerated dramatically.

Giardini notes that the Ambler Belt trend runs roughly 100 kilometers yet has seen only about 200,000 meters of drilling, a fraction of what comparable belts have received. For context, Noranda and Flin Flon saw multiple millions of meters drilled over decades. The disparity highlights the scale of discovery potential remaining at Ambler.

A Major De-Risking Event: The Ambler Access Road Moves Forward

Infrastructure is key to unlocking development at the Ambler Mining District. Advancement of the Ambler Access Road, a controlled, industrial-use corridor connecting the district to the Dalton Highway, is critical to enabling mine development and large-scale exploration.

Recent federal actions represent major milestones in moving the road forward. A presidential decree from the Trump administration formally supported development of the road as a strategic national priority, and subsequent administrative reviews have reaffirmed its importance. The result is greater clarity around permitting and long-term viability of the corridor.

Adding to this momentum, the U.S. Department of War (“DOW”) recently committed a $35.6 million investment to advance exploration and development of the Upper Kobuk Mineral Projects in the district, held by Ambler Metals. The DOW will hold approximately 10% of Trilogy Metals, lending further credence to the upside of the company.

With road access appearing increasingly achievable, Trilogy and its partners are positioned to transition the Arctic project toward a construction decision once final approvals are in place.

Arctic, Bornite, and the Path Toward a Multi-Decade Mining Camp

The Arctic deposit is one of the highest-grade undeveloped VMS copper projects globally, hosting a reserve profile that could support a long-life, low-cost mine. Bornite, meanwhile, is a large copper-cobalt system with substantial resource expansion potential. Together, these assets could anchor a mining camp with decades of production.

Giardini stresses that these deposits represent only the starting point. The district is still in its early exploration stages, with multiple identified prospects along a trend that has barely been drilled. If history is a guide, establishing initial production often unlocks a rapid cycle of new discoveries, as capital, infrastructure, and drilling density increase.

This dynamic is exactly how the great Canadian VMS camps evolved: single deposits grew into multi-generational mining districts supporting entire regional economies.

Strong Local Partnerships and Stakeholder Alignment

Trilogy’s partnership (through Ambler Metals) with NANA Regional Corporation, the Alaska Native corporation that owns substantial land in the district, is another key advantage. NANA is deeply experienced in mining operations, having partnered successfully with Teck Resources at the Red Dog Mine for over 30 years. Their involvement ensures that development aligns with community priorities, workforce opportunities, and long-term environmental stewardship.

This alignment reduces social risk and increases certainty for a district-scale buildout, especially in a remote region where local collaboration is essential.

Positioned at the Intersection of Geology, Infrastructure, and National Priorities

Trilogy Metals sits within a transformative moment, positioning itself to drive domestic production for domestic use and support the future of U.S. critical minerals security. The combination of high-grade deposits, vast exploration upside, and domestic strategic importance positions the Ambler Mining District as one of the strongest copper development opportunities in North America.

If the road proceeds as current signals suggest, the Ambler Mining District could evolve into a major U.S. copper hub, and Trilogy Metals would be at the center of a mining camp with potential to rival the historic Noranda and Flin Flon belts.

For more information, visit www.TrilogyMetals.com.

NOTE TO INVESTORS: The latest news and updates relating to TMQ are available in the company’s newsroom at https://ibn.fm/TMQ

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