Mr. Matthew Rowlinson reports

SOLARIS COMPLETES WARINTZA DRILLING CAMPAIGN AND ADVANCES KEY DE-RISKING MILESTONES AHEAD OF MAJOR NEAR-TERM VALUE CATALYSTS

Solaris Resources Inc. has completed a significant drilling campaign at its flagship Warintza project in southeastern Ecuador, alongside key developments that continue to strategically derisk and enhance the value of this globally significant copper asset.

Highlights:

• Solaris completes significant drilling campaign at its flagship Warintza project:
• • 82,000 metres of infill drilling;
  • Updated mineral resource estimate targeted for Q3 2025;
  • Stepout field exploration activities are continuing;
• Technical approval of the environmental impact assessment on target for mid-2025;
• Prefeasibility study on target for publication in Q3 2025;
• Re-election of President Daniel Noboa provides political stability, reinforcing the supportive policy environment.

Between January, 2024, and February, 2025, Solaris completed over 82,000 metres of infill drilling, positioning the company to upgrade a substantial portion of inferred resources to the measured and indicated categories. An updated mineral resource estimate, targeted for Q3 2025, will incorporate these data, adding precision and confidence ahead of economic studies and advancing the Warintza project toward development. The drilling campaign also included more than 15,000 metres of geotechnical, hydrogeological and metallurgical holes that will support the technical studies for the project.

To date, Solaris has drilled over 200,000 metres across the Warintza Central and East porphyry systems. This extensive data set supports a highly flexible, staged mine plan underpinned by near-surface mineralization, which is expected to materially reduce initial capital requirements. In parallel, improved geological insights have provided an understanding of the highly competitive overburden to ore profiling over the mine life.

As Warintza evolves into a near-term, Tier 1, multigenerational copper project, Solaris is simultaneously unlocking value across its broader 100-per-cent-owned land package of over 260 square kilometres, which contains several high-priority regional targets. Stepout field exploration activities are continuing.

On the infrastructure front, Solaris has now completed 20 kilometres of internal road access, enabling year-round vehicular reach to all project areas. This significantly accelerates the timelines and reduces cost during the construction phase, a key advantage as the company transitions into development readiness.

The recent re-election of President Noboa provides political stability, reinforcing the supportive policy environment that has enabled Solaris to maintain progress on permitting and stakeholder engagement. The company is advancing the technical review of the environmental impact assessment (EIA) in collaboration with Ecuador's Ministries of Environment and Mines, with approval on target for mid-2025.

In parallel, Solaris is advancing its prefeasibility study, led by Ausenco and Knight Piesold, with completion targeted for Q3 2025. Work will then transition into the bankable feasibility study, further underpinning a fully optimized and financeable development plan.

Solaris remains committed to its participatory mining model, fostering strong local partnerships and social licence while building long-term value for all stakeholders. With sustained progress across technical, environmental and social fronts, the company is on track to deliver a final investment decision by year-end 2026, a pivotal milestone aligned with a robust global copper market outlook.

Matthew Rowlinson, president and chief executive officer, commented: "Ecuador's future is filled with promise, and we look forward to working hand in hand with the new government to unlock the full potential of the Warintza copper project, a unique, global-scale, Tier 1, multigenerational asset, for Ecuador, by Ecuador.

"Warintza stands as a symbol of what sustainable and responsible development can achieve. Our commitment to operating with integrity, empowering local communities and creating lasting value for all stakeholders remains at the core of everything we do.

"We are excited for what lies ahead and proud to support Ecuador's journey toward a bright and prosperous future."

About Solaris Resources Inc.

Solaris is a copper-gold exploration and development company, committed to a sustainable future by empowering communities and stakeholders through its dedication to participatory and responsible mining. The Warintza project, a large copper-gold porphyry deposit, is a unique, global scale and multigenerational asset located in the low-capital-intensity district of southeastern Ecuador. The company also owns a series of grassroots exploration projects with discovery potential in Peru and Chile and a 60-per-cent interest in the La Verde joint venture project with a subsidiary of Teck Resources in Mexico.

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