Mr. Matthew Rowlinson reports

SOLARIS SECURES EIA TECHNICAL APPROVAL AND FURTHER STRENGTHENS THE BALANCE SHEET

Solaris Resources Inc. has received the technical approval of the environmental impact assessment (EIA) for its Warintza project in southeastern Ecuador. The approval represents a major permitting milestone and a significant derisking event for the project following an extensive technical review process conducted by a multidisciplinary team from the Ministry of Environment and Energy.

The EIA technical approval reflects a comprehensive evaluation of the project's environmental, engineering and social management plans, including detailed analysis covering environmental baseline studies, water management, biodiversity protection, infrastructure design, geological understanding and community engagement frameworks.

Matthew Rowlinson, president and chief executive officer of Solaris Resources, commented: "This approval is a critical milestone for the Warintza project and an important validation of the technical quality, environmental stewardship and responsible development approach undertaken by our team. The EIA review involved rigorous technical evaluation and close collaboration with regulators over an extended period. Achieving this milestone significantly derisks the project and reflects the strength of our environmental planning and responsible development approach. Importantly, this milestone also enables the company to access the second tranche of $50-million (U.S.) under our financing agreement with RGLD Gold AG, a wholly owned subsidiary of Royal Gold Inc., further strengthening the balance sheet as we continue to advance key workstreams across permitting, infrastructure development and district-scale exploration at Warintza."

Permitting next steps

Following receipt of the EIA technical approval, the Warintza project will advance through the remaining stages of Ecuador's environmental licensing and development approval process, including the government-led free, prior and informed consultation (FPIC) process. Government officials conducted an initial site visit during 2025 to assess project readiness and the formal consultation process is expected to commence shortly. Completion of these steps will support the granting of Warintza's mining exploitation agreements, with Solaris targeting a fully permitted project by the end of 2026.

Second tranche of Royal Gold financing secured

Following the publication of the prefeasibility study (PFS) in November, 2025, and the receipt of EIA technical approval, Solaris has satisfied the conditions required to draw down the second tranche under its $200-million (U.S.) financing agreement with Royal Gold, which closed in May, 2025.

This milestone enables the company to access $50-million (U.S.) in additional financing that further strengthens the company's balance sheet and provides additional financial flexibility to advance key development activities at Warintza. The third tranche of $50-million (U.S.) will become available on the first anniversary of the closing date, subject to completion of all filings necessary to fully perfect Royal Gold's security.

The Warintza project remains one of the most significant undeveloped copper assets globally, with strong support from local communities and a growing body of technical work demonstrating its scale and development potential.

The receipt of EIA technical approval marks a major step toward project development and underscores the continued progress Solaris is making across permitting, exploration, infrastructure planning and strategic partnerships.

Qualified person

The scientific and technical content of this news release has been reviewed and approved by Jorge Fierro, MSc, DIC, PG, vice-president of exploration of Solaris, who is a qualified person as defined in National Instrument 43-101, Standards of Disclosure for Mineral Projects. Mr. Fierro is a registered professional geologist through the SME (registered member No. 4279075).

About Solaris Resources Inc.

Solaris Resources is a copper-gold exploration and development company advancing a portfolio of high-quality assets across the Americas. Its flagship asset is the 100-per-cent-owned Warintza copper porphyry project in southeastern Ecuador. Solaris is committed to responsible mining practices that prioritize environmental stewardship, shared value creation, and long-term benefits for local communities and stakeholders.

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