Mr. Justin Reid reports

TROILUS ADVANCES PROCUREMENT AND DETAILED ENGINEERING AS PROJECT EXECUTION READINESS BUILDS

Troilus Mining Corp. has provided an update on engineering, procurement and site readiness activities supporting continued execution planning at its wholly owned copper-gold Troilus project located in north-central Quebec.

Following the completion of basic engineering announced on March 24, 2026, Troilus has moved into the next phase of project execution planning, with detailed engineering now fully mobilized and procurement activities advancing across the project. Current work is focused on translating engineering definition into vendor selection, equipment specifications, 3-D modelling, site infrastructure planning and future construction sequencing.

Project execution progress highlights

• Detailed engineering fully mobilized across process plant, infrastructure, site layout, 3-D modelling and procurement support;
• More than 40 bid packages have been issued for tender or are under technical and commercial evaluation, covering major process equipment, infrastructure, site services and enabling works;
• Initial enabling infrastructure selections made for key water treatment and site support systems;
• Major process equipment package progressing through final selection, representing an important upcoming milestone for detailed engineering and construction planning;
• Geotechnical field drilling program completed, supporting foundation design, site layout, infrastructure planning and earthworks;
• Independent third party reviews of process plant design, basic engineering assumptions and capital cost methodology completed, with no material issues identified.

Justin Reid, chief executive officer of Troilus, commented: "Since completing basic engineering earlier this year, Troilus has continued to build momentum across the next phase of project development. Detailed engineering is now fully mobilized, and our team is advancing the technical and commercial work required to support key equipment, infrastructure and construction planning decisions. For a large-scale 50,000-tonne-per-day operation, this early work is critical to maintaining schedule discipline, strengthening cost certainty and ensuring that major equipment decisions are properly integrated into final engineering and execution planning. The progress we are making reflects the strength and focus of our team, and our disciplined approach to reducing execution risk ahead of a formal construction decision."

Procurement and detailed engineering

Procurement is now a central focus of the current phase of project advancement. Engineering teams are preparing technical specifications, reviewing vendor submissions, evaluating bids and integrating vendor data into detailed engineering.

The major process equipment package is currently advancing through final technical and commercial evaluation and selection. Once finalized, this package is expected to support a meaningful step forward in plant layout, 3-D modelling, construction planning and future capital deployment.

Troilus has also advanced initial enabling infrastructure selections to support site readiness and ensure that key infrastructure decisions remain aligned with the broader execution plan.

Technical validation and site readiness

Troilus has completed independent third party reviews of key technical and execution components of the project, including process plant design, basic engineering assumptions and capital cost methodology. The company has also completed its geotechnical field drilling program, with results to be incorporated into detailed engineering as final interpretations and recommendations are received.

In parallel, site readiness activities continue to progress, including camp expansion planning, site infrastructure upgrades, water management systems, communications and technology upgrades, and preparation for future contractor mobilization.

Troilus continues to advance these activities in a disciplined manner, aligned with permitting, financing and overall construction readiness planning.

About Troilus Mining Corp.

Troilus Mining is a Canadian development-stage mining company focused on the systematic advancement of the former gold and copper Troilus mine toward production. Troilus is located in the Tier 1 mining jurisdiction of Quebec, Canada, where it holds a large land position of 435 square kilometres in the Frotet-Evans greenstone belt. A feasibility study completed in May, 2024, supports a large-scale 22-year, 50,000-tonne-per-day open-pit mining operation, positioning it as a cornerstone project in North America.

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