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TROILUS WELCOMES QUÉBEC GOVERNMENT LEADERS TO ITS SITE FOR OFFICIAL ANNOUNCEMENT OF 70 MW HYDROELECTRIC POWER ALLOCATION Government Officials Highlight Troilus' Role in Advancing Québec's Critical Minerals Strategy and Economic Development Priorities

Corporate Updates

TROILUS WELCOMES QUÉBEC GOVERNMENT LEADERS TO ITS SITE FOR OFFICIAL

ANNOUNCEMENT OF 70 MW HYDROELECTRIC POWER ALLOCATION

Government Officials Highlight Troilus' Role in Advancing Québec's Critical Minerals

Strategy and Economic Development Priorities

June 10, 2026, Montreal, Quebec – Troilus Mining Corp. (TSX: TLG; OTCQX: CHXMF; FSE: CM5)

(“Troilus” or the “Company”) is pleased to announce that it recently welcomed representatives from

the Government of Québec to the Troilus Copper-Gold Project in north-central Québec for the

official announcement of the allocation of 70 megawatts (“MW”) of hydroelectric power to the

Project (see June 2, 2026 press release).

The announcement , held at the Troilus Project site on June 8, 2026, was made by Bernard Drainville,

Minister of Economy, Innovation and Energy (“MEIE”), and Kateri Champagne Jourdain, Minister of

Natural Resources and Forests (“MRNF”), alongside Denis Lamothe, Member of the National

Assembly for Ungava. The event also brought together representatives from Hydro-Québec,

members of the Cree community, regional stakeholders, municipal representatives including Nichèle

Compartino, Mayor of Chibougamau, and members of the media (see Figure 1).

During the announcement, Minister Drainville and Minister Champagne Jourdain highlighted the role

of projects such as Troilus in supporting Québec’s critical minerals strategy, regional economic

development priorities, and long-term energy transition objectives at a time of growing global

demand for copper. Mr. Lamothe also spoke to the importance of the Project for Northern Québec

and recognized Troilus’ ongoing commitment to creating long-term opportunities for regional

workers, businesses, and communities.

Justin Reid, CEO of Troilus, commented, “It was a pleasure to welcome Minister Drainville, Minister

Champagne Jourdain, Mr. Lamothe, representatives from Hydro-Québec, our Cree partners, regional

stakeholders, and members of the media to the Troilus Project for this important announcement. We

would also like to congratulate Hydro-Québec and the Government of Québec on yesterday’s

announcement regarding the development of new training infrastructure in Chibougamau, which

further reflects the long-term commitment being made toward economic development, workforce

development, and sustainable growth in Northern Québec.

Access to reliable, low-carbon hydroelectric power is fundamental to the responsible development of

large-scale mining projects in Northern Québec, and the allocation of 70 MW marks a significant step

forward as we continue advancing permitting, engineering, financing, and overall project readiness

activities. As one of Québec’s largest copper-gold development projects, Troilus has the potential to

become an important long-term contributor to the province’s economy and critical minerals strategy.

We look forward to continuing to build on the strong partnerships that have helped bring the Project

to this stage.”

The allocation of 70 MW of clean hydroelectric power supports the future construction and

operation of the Troilus Project, which is expected to create approximately 1,000 jobs during

construction and approximately 680 long-term jobs during operations in the Eeyou Istchee James Bay

region. At current mine plan levels, the Project is also expected to generate significant long-term

economic benefits and tax revenues for Québec over its multi-decade operating life.

Figure 1. From left Caroline Arsenault, Troilus’ Vice President of Corporate Communications, Daniel

Bergeron, Troilus’ Vice President of Special Projects, Kateri Champagne Jourdain, Minister of Natural

Resources and Forests of Québec, Justin Reid, CEO of Troilus, Denis Lamothe, Member of the

National Assembly for Ungava and Bernard Drainville, Minister of Economy, Innovation and Energy of

Québec.

Advancement of Project Financing and Technical Due Diligence Activities

The official announcement follows a period of significant activity at the Troilus Project as the

Company continues advancing multiple development workstreams in parallel.

In recent weeks, Troilus hosted representatives from international financial institutions and export

credit agencies from Canada, Germany, Finland, Denmark, Sweden, France, and the United States at

the Project site as part of ongoing technical, environmental, operational, and project financing due

diligence activities associated with the Company’s previously announced US$1.2 billion debt

financing mandate.

The site visits included reviews of ongoing engineering, infrastructure, environmental, permitting,

and development readiness activities , and represent an important component of the Project

evaluation process as Troilus advances toward a fully funded construction decision.

Troilus continues to make progress across financing, permitting, engineering, and overall project

readiness initiatives as it advances toward construction.

About Troilus Mining Corp.

Troilus Mining Corp. is a Canadian development-stage mining company focused on the responsible

advancement of the former gold and copper Troilus Mine towards near-term production. Troilus is

located in the tier-one mining jurisdiction of Quebec, Canada, where it holds a large land position of 435

km² in the Frôtet-Evans Greenstone Belt. A Feasibility Study completed in May 2024 supports a large-

scale 22-year, 50ktpd open-pit mining operation, positioning it as a cornerstone project in North

America.

For more information:

Caroline Arsenault

VP Corporate Communications

+1 (647) 276-0050

[email protected]

Cautionary Note Regarding Forward-Looking Statements and Information

This press release contains “forward- looking statements” within the meaning of applicable Canadian

securities legislation. Forward-looking statements include, but are not limited to, statements regarding,

the impact of the power allocation on the Company and its emission reduction objectives and its

sufficiency to support development as planned. the strategic importance of the Troilus Project and the

likelihood that it will deliver meaningful economic benefits , including employment, in Northern Québec

on the estimated timeline and quantity, or at all. Generally, forward-looking statements can be identified

by the use of forward-looking terminology such as “plans”, “expects” or “does not expect”, “is expected”,

“budget”, “scheduled”, “estimates”, “forecasts”, “intends”, “continue”, “anticipates” or “does not

anticipate”, or “believes”, or variations of such words and phrases or statements that certain actions,

events or results “may”, “could”, “would”, “will”, “might” or “will be taken”, “occur” or “be

achieved”. Forward-looking statements are made based upon certain assumptions and other important

facts that, if untrue, could cause the actual results, performances or achievements of Troilus to be

materially different from future results, performances or achievements expressed or implied by such

statements. Such statements and information are based on numerous assumptions regarding present

and future business strategies and the environment in which Troilus will operate in the future. Certain

important factors that could cause actual results, performances or achievements to differ materially

from those in the forward- looking statements include, amongst others, currency fluctuations, the global

economic climate, dilution, share price volatility and competition. Forward- looking statements are

subject to known and unknown risks, uncertainties and other important factors that may cause the

actual results, level of activity, performance or achievements of Troilus to be materially different from

those expressed or implied by such forward- looking statements, including but not limited to: risks and

uncertainties inherent to mineral resource and reserve estimates; the high degree of uncertainties

inherent to feasibility studies and other mining and economic studies which are based to a significant

extent on various assumptions; variations in gold prices and other metals, exchange rate fluctuations;

variations in cost of supplies and labour; receipt of necessary approvals; availability of financing for

project development; uncertainties and risks with respect to developing mining projects; general

business, economic, competitive, political and social uncertainties; future gold and other metal prices;

accidents, labour disputes and shortages; environmental and other risks of the mining industry, including

without limitation, risks and uncertainties discussed in the Company’s latest Annual Information Form, its

technical reports and other continuous disclosure documents of the Company available under the

Company’s profile at www.sedarplus.ca. Although Troilus has attempted to identify important factors

that could cause actual results to differ materially from those contained in forward- looking statements,

there may be other factors that cause results not to be as anticipated, estimated or intended. There can

be no assurance that such statements will prove to be accurate, as actual results and future events could

differ materially from those anticipated in such statements. Accordingly, readers should not place undue

reliance on forward- looking statements. Troilus does not undertake to update any forward- looking

statements, except in accordance with applicable securities laws.