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Trilogy Metals Announces 2026 Program and Budget for Ambler Metals and the Corporate Budget for the Company

Exploration Programs

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News Release

Trilogy Metals Announces 2026 Program and Budget for Ambler

Metals and the Corporate Budget for the Company

December 17, 2025 – Vancouver, British Columbia – Trilogy Metals Inc. (NYSE American / TSX:

TMQ) (“Trilogy Metals”, “Trilogy” or “the Company”) is pleased to announce the program and budget

for Ambler Metals LLC, as well as the Company’s corporate budget for 2026, reflecting a year focused

on advancing the Ambler Mining District toward permitting, technical de -risking, and long -term

development. All amounts are in US dollars.

Ambler Metals LLC (“Ambler Metals”), the joint venture operating company equally owned by Trilogy

and South32 Limited (ASX, LSE, JSE: S32; ADR: SOUHY) (“South32”), has recently approved the 2026

program and budget totaling approximately $35 million for the advancement of the Upper Kobuk

Mineral Projects (“UKMP”) located in northwestern Alaska.

Advancing the Ambler Mining District in 2026

The 2026 work program represents a pivotal year of progress for the UKMP as Ambler Metals prepares

to initiate the mine permitting process for the Arctic Project, while continuing to advance the

technical and organizational foundations required for future development.

The joint venture is targeting mine permit submissions in 2026 , potentially leveraging federal

expedited programs such as FAST-41, subject to project readiness and continued engagement with

stakeholders. FAST-41 is a US federal framework designed to enhance coordination, transparency

and predictability for permitting critical infrastructure projects.

In parallel, Ambler Metals will advance engineering, environmental, and technical programs required

to support a future final investment decision for mine construction and operations.

Exploration, Drilling and Camp Activities

Exploration activities in 2026 will focus primarily on the Arctic Project, including geotechnical and

condemnation drilling to support mine design, infrastructure placement, and future production

planning. Ambler Metals will also be preparing the Bornite Project camp for ongoing exploration and

multi-year use . The joint venture plans to open the Bornite c amp during the 2026 summer field

season to conduct geotechnical and exploration drilling, along with general camp maintenance and

capital improvements to support future programs.

Building for the Next Phase

During 2026, Ambler Metals will re -establish an independent management team dedicated to

managing the next stages of advancement at the UKMP . Over the coming years, this team will focus

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on advancing permitting for the Arctic Project, completing technical programs , executing drill

campaigns critical for mine design and infrastructure planning as well as strengthening community

engagement, workforce development and local participation. Engagement with local communities

and regional stakeholders will remain a core element of the program, with continued emphasis on

transparent communication, consultation, and long-term workforce planning.

Ambler Access Project

Ambler Metals will continue to evaluate, through its existing arrangement with the Alaska Industrial

Development and Export Authority (“ AIDEA”), the potential for early-stage funding opportunities to

support advancement of the Ambler Access Project (also known as the Ambler Road) . The Ambler

Road is a proposed 211-mile, industrial-use-only road connecting the Ambler Mining District to the

Dalton Highway, intended to enable exploration and development at the UKMP.

Corporate Budget and Financial Position

Trilogy Metals has approved its 2026 corporate budget of approximately $5 million, primarily related

to public company compliance and oversight of its investment in Ambler Metals.

The Company maintains a strong cash position of over $50 million , providing funding for ongoing

operations and its share of future joint venture requirements. In October 2025, the Company utilized

its at-the-market program that was established in May 2025 (“May ATM Program”) and sold

3,513,495 common shares of the Company at an average price of $7.12 per share, generating gross

proceeds of approximately $25 million.

Additional funding is expected to be available to Ambler Metals following the closing of the previously

announced transaction with the US Department of War. On October 6, 2025, t he Company

announced a strategic investment by the US federal government of approximately $35.6 million to

support the development of critical mineral resources at the UKMP through transactions with Trilogy

Metals and South32. The transactions are anticipated to close in early 2026.

About Trilogy Metals

Trilogy Metals Inc. is a metal exploration and development company which holds a 50 percent

interest in Ambler Metals LLC, which has a 100 percent interest in the UKMP in northwestern Alaska.

On December 19, 2019, South32, a globally diversified mining and metals company, exercised its

option to form a 50/50 joint venture with Trilogy. The UKMP is located within the Ambler Mining

District which is one of the richest and most- prospective known copper-dominant districts in the

world. It hosts world -class polymetallic volcanogenic massive sulphide (“ VMS”) deposits that

contain copper, zinc, lead, gold and silver, and carbonate replacement deposits which have been

found to host high-grade copper and cobalt mineralization. Exploration efforts have been focused on

two deposits in the Ambler Mining District – the Arctic VMS deposit and the Bornite carbonate

replacement deposit. Both deposits are located within a land package that spans approximately

190,929 hectares. 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. Trilogy’s vision is to develop the

Ambler Mining District into a premier North American copper producer while protecting and

respecting subsistence livelihoods.

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Company Contacts

Tony Giardini Elaine Sanders

President & Chief Executive Officer Vice President & Chief Financial Officer

Phone: 604-638-8088

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Cautionary Note Regarding Forward-Looking Statements

This news release includes certain "forward-looking information” and "forward-looking statements”

(collectively "forward-looking statements”) within the meaning of applicable Canadian and United

States securities legislation including the United States Pri vate Securities Litigation Reform Act of

1995. All statements, other than statements of historical fact, included herein, including, without

limitation, statements regarding Ambler Metals’ 2026 work program and budget, the Company’s 2026

budget, acceptance into the FAST-41 program, early-stage funding opportunities with AIDEA, the use

of proceeds of sales under the May ATM Program, and the closing of the transactions with the US

federal government are forward-looking statements. Forward-looking statements are frequently, but

not always, identified by words such as "expects” , "anticipates” , "believes” , "intends” , "estimates” ,

"potential” , "possible” , and similar expressions, or statements that events, conditions, or results

"will” , "may” , "could” , or "should” occur or be achieved. Forward-looking statements involve various

risks and uncertainties. There can be no assurance that such statements will prove to be accurate,

and actual results and future events could differ materially from those anticipated in such

statements. Important factors that could cause actual results to differ materially from the Company's

expectations include the uncertainties involving the outcome of pending litigation, success o f

exploration activities, permitting timelines, requirements for additional capital, government

regulation of mining operations, environmental risks, prices for energy inputs, labour, materials,

supplies and services, uncertainties involved in the interpre tation of drilling results and geological

tests, unexpected cost increases and other risks and uncertainties disclosed in the Company’s

Annual Report on Form 10 -K for the year ended November 30, 2024 filed with Canadian securities

regulatory authorities and with the United States Securities and Exchange Commission and in other

Company reports and documents filed with applicable securities regulatory authorities from time to

time. The Company's forward-looking statements reflect the beliefs, opinions and projections on the

date the statements are made. The Company assumes no obligation to update the forward -looking

statements or beliefs, opinions, projections, or other factors, should they change, except as required

by law.