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HIGHLIGHTS OF THE PRESS RELEASE: Solaris strengthens its dominant position in the world-class Warintza district through an option to acquire new, highly prospective exploration concessions adjacent to the flagship project New areas interpreted to host significant copper mineralization, characterized by widespread potassic alteration typical of large copper porphyry systems Early-stage prospecting results from Solaris 1 identify compelling copper anomalies with rock samples returning up to 8.38% Cu, supporting immediate follow-up work and reinforcing district-scale discovery potential Parallel track permitting strategy advancing strongly, with Environmental Impact Assessment (“EIA”) technical approval approaching Feasibility Study underway with leading international engineering and technical partners QUITO, Ecuador, Jan. 28, 2026 (GLOBE NEWSWIRE) -- Solaris Resources Inc. (“Solaris” or the “Company”) (TSX: SLS; NYSE: SLSR) is pleased to announce a major advancement in its district-scale growth strategy. Ecuador's state-owned mining company, Empresa Nacional Minera ENAMI EP (“ENAMI EP”), has granted Solaris an option to acquire up to a 100% interest in a new portfolio of highly prospective exploration areas (“Solaris 2”) located immediately adjacent to the Company's world-class Warintza Project (“Warintza”) in southeastern Ecuador.

Solaris Resources released a positive pre-feasibility study for its flagship Warintza copper project in Ecuador, confirming robust project economics. SLSR's Warintza project boasts a 22-year mine life, high initial copper output, and low all-in sustaining costs, driving strong after-tax free cash flow and NPV. The company is financially strong, recently relocated to Switzerland for strategic flexibility, and is positioned as a prime takeover target in the copper sector.

HIGHLIGHTS OF THE PRESS RELEASE: Globally significant Mineral Resource with extensive mine life and first quartile cash costs driving significant Free Cash Flow (“FCF”) generation: Average annual copper equivalent (“CuEq”) production of over 300,000 tonnes in the first five years and over 240,000 tonnes during the first 15 years First quartile All-In Sustaining Cost (“AISC”) of US$0.85/lb of payable Cu for the first five years and US$1.07/lb of payable Cu during the first 15 years Post-tax net present value (“NPV”) (8%) of US$4,617M (pre-tax NPV 8 % of US$7,492M) and a post-tax internal rate of return (“IRR”) of 26% (pre-tax IRR of 34%) Average annual Earnings Before Interest, Taxes, Depreciation, and Amortization (“EBITDA”) of US$1.9bn for the first five years and US$1.4bn during the first 15 years Average annual post-tax Free Cash Flow (“FCF”) of US$1.3bn for the first five years and US$1.0bn over the first 15 years Initial capital costs (pre-production) of US$3.7bn (including 15.7% overall contingency) Attractive capital intensity of ~US$15,440/avg tpa-CuEq over the first 15 years 2.6 year post-tax payback period (1.9 year pre-tax payback) Maiden Mineral Reserve estimate of 1.3 billion tonnes (Proven and Probable) at 0.41% CuEq (0.31% Cu, 0.02% Mo, 0.04 g/t Au and 1.30 g/t Ag), providing a mine life of 22 years 2025 Mineral Resource Estimate (“MRE”) incorporates a 312% increase in Measured plus Indicated Mineral Resources, at a cut-off grade of 0.1% Cu and a net smelter return (“NSR”) cut-off value of US$6.30/t, compared with the published 2024 MRE Possibility of extending the mine life by a timeframe in the order of 25 to 30 years beyond the Mineral Reserves LOM average strip ratio of 0.53 to 1 (waste to ore) positions Warintza as one of the lowest strip ratio copper mines globally, underpinning a very favourable strip-adjusted grade Operational simplicity driven by conventional open pit mining methods operating at low elevation and using standard processing equipment Excellent access to infrastructure (water, power, roads, ports, etc.) Production of both a high-quality copper concentrate and a clean molybdenum concentrate, both products have non-material levels of deleterious elements Pre-Feasibility Study prepared in conjunction with highly experienced consultants Ausenco, Knight Piésold, and AMC QUITO, Ecuador, Nov. 06, 2025 (GLOBE NEWSWIRE) -- Solaris Resources Inc. (“Solaris” or the “Company”) (TSX: SLS; NYSE: SLSR) is pleased to announce the results of a Pre-Feasibility Study (the “PFS”) with an updated Mineral Resource Estimate (“2025 MRE”) and maiden Mineral Reserves for its Warintza Project (“Warintza”, the “Project” or the “Warintza Project”), located in southeastern Ecuador.