Mr. Daniel Earle reports

SOLARIS REPORTS 148M OF 0.72% CUEQ WITHIN 325M OF 0.51% CUEQ FROM SURFACE; UPDATED MINERAL RESOURCE ESTIMATE EXPECTED THIS MONTH

Solaris Resources Inc. has released drill results from the continuing 2024 drilling program at its Warintza project in southeastern Ecuador. These include the final assays for inclusion in the updated mineral resource estimate, which is expected to be released this month. Highlights are listed herein.

Highlights:

• SLSE-36 was collared at the southeasternmost platform at Warintza Southeast and returned 148 metres of 0.72 per cent copper equivalent within a broader interval of 325 m of 0.51 per cent CuEq from surface, and remains open in strong mineralization, with the final 34 m averaging 0.90 per cent CuEq.
• SLS-77 was collared on the northern boundary of the northeastern extension of Warintza Central and returned 108 m of 0.70 per cent CuEq from near surface within a broader interval of 273 m of 0.57 per cent CuEq from surface.
• SLS-78 was collared from a new platform 100 m to the west and drilled west through leached cap before returning 78 m of 0.70 per cent CuEq within a broader interval of 114 m of 0.65 per cent CuEq from a 72-metre depth and then entering low-grade granodiorite.
• SLS-79 was collared from the same platform and drilled west at steep inclination, returning 78 m of 0.60 per cent CuEq from near surface within a broader interval of 248 m of 0.50 per cent CuEq, ending in strong mineralization.
• SLST-03 was collared approximately 300 m south of Warintza Central at the Trinche platform and drilled northwest into an open volume to convert undefined waste within the expected pit shell, returning 312 m of 0.62 per cent CuEq within a broader interval of 1,028 m of 0.30 per cent CuEq from surface.
• Patrimonio hole 04 consistent with 01 and 02 intersected an approximately 150-metre-thick tabular zone of replacement mineralization, dipping shallowly to the west, for which the source has not yet been encountered. SLSP-03 was collared at higher elevation and intersected a low-grade layer in the host lava sequence before passing into a barren, postmineral porphyry that intruded and displaced the targeted mineralized layer. Mineral alteration zoning and geochemistry suggest that the core of the mineralized system lies to the south.
• Two thousand twenty-four drill program was recently expanded to 60,000 m comprising 140 holes from 80 platforms providing significantly improved drilling coverage with 27,000 m in 74 holes completed to the end of June, with seven rigs targeting greater than eight kilometres of drilling in July due to improved site logistics from infrastructure development at site.
• Continuing drilling is focused on Patrimonio exploration, resource extension at Warintza Southeast, and infill and technical drilling to support the prefeasibility study in second half 2025, including geotechnical holes which are expected to fulfill a dual role in providing information to aid in the understanding of the geology of the Caya-Mateo epithermal gold and silver target area.

Technical information and quality control and quality assurance

Sample assay results have been independently monitored through a quality control/quality assurance program that includes the insertion of blind certified reference materials (standards), blanks and field duplicate samples. Logging and sampling are completed at a secured company facility located on site. Drill core is cut in half on site, and samples are securely transported to ALS Labs in Quito. Sample pulps are sent to ALS Labs in Lima, Peru, and Vancouver, Canada, for analysis. Total copper and molybdenum contents are determined by four-acid digestion with AAS finish. Gold is determined by fire assay of a 30-gram charge. In addition, selected pulp check samples are sent to Bureau Veritas lab in Lima, Peru. Both ALS Labs and Bureau Veritas lab are independent of Solaris. Solaris is not aware of any drilling, sampling, recovery or other factors that could materially affect the accuracy or reliability of the data referred to herein. Details on the surface sampling conducted at the project are set out in the technical report titled, "NI 43-101 Technical Report for the Warintza Project, Ecuador (Amended)," with an effective date of April 1, 2022, prepared by Mario E. Rossi and available on the company's SEDAR+ profile and website. The drill hole data have been verified by Jorge Fierro, MSc, DIC, PG, using data validation and quality assurance procedures under high industry standards.

Qualified person

The scientific and technical content of this press release has been reviewed and approved by Jorge Fierro, MSc, DIC, PG, vice-president, 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 is advancing a portfolio of copper and gold assets in the Americas, which includes a world-class copper resource with expansion and discovery potential at its Warintza project in Ecuador, a series of grassroots exploration projects with discovery potential in Peru and Chile, and significant leverage to increasing copper prices through its 60-per-cent interest in the La Verde joint venture project with a subsidiary of Teck Resources in Mexico.

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