Silverco Mining Engages SGS to Validate and Update Mineral Resource Estimate at the Cusi Property

Vancouver, British Columbia--(Newsfile Corp. - November 17, 2025) - Silverco Mining Ltd. (TSXV: SICO) ("Silverco" or the "Company") is pleased to announce that it has engaged SGS Canada Inc. ("SGS") to complete an independent validation and update of the 2020 historical mineral resource estimate ("MRE") for its 100%-owned Cusi Property ("Cusi") located approximately 90 km northwest of First Majestic's Los Gatos Mine in Chihuahua State, Mexico. The updated resource will be prepared in accordance with National Instrument 43-101 - Standards of Disclosure for Mineral Projects ("NI 43-101").

The updated MRE will incorporate new data and expand the scope of the previous historical estimate by:

• Independently validating the historical resource data for the Cusi Property.

• Integrating up to 11,500 metres of Silverco drilling, including approximately 6,000 metres from the ongoing 2025 drill program and 5,500 metres from the completed 2024 drill program.

• Including a new resource area for the San Miguel Vein system which was consolidated by the Company with the acquisition of the inset claims. San Miguel was not part of the 2020 historical resource and will be modeled for the first time in the updated MRE. The 2024 program demonstrated significant, open-ended resource potential at San Miguel, including an intercept of 7.5 metres grading 364 g/t AgEq in hole CU-24-08. This was further validated in 2025 drilling with 8.6 metres grading 250 g/t AgEq in hole CU-25-29.

• Accounting for mining depletion that has occurred since the effective date of the previous 2020 historical estimate, which is estimated to be approximately 900,000 tonnes.

• Tightening the definition of the inferred resource material by using a smaller search radius during estimation, meaning less projection of potential mineralization into undrilled areas, which de-risks and improves the overall quality of the resource model.

• Updating reporting cut-off grades for new metal prices and inflation adjusted cost estimates.

SGS has recently completed several MREs at neighbouring properties including Vizsla Silver's Panuco Project, Endeavour Silver's Pitarrilla Project, and Kootenay Silver's Columba and La Cigarra Projects.

The updated MRE is expected later this quarter. Once completed, the Company anticipates meeting the requirements to apply for Tier 1 issuer status on the Exchange.

Additionally, the Company has engaged Triomphe Holdings Ltd., doing business as Capital Analytica ("Capital Analytica"), an arm's-length service provider, to provide certain marketing and social media services to the Company, in accordance with the policies of the TSX Venture Exchange ("TSXV") and applicable securities laws. Based in Nanaimo, British Columbia, Capital Analytica specializes in marketing, social media, and public awareness within the mining and metals sector. Under a consulting services agreement dated November 14, 2025, Capital Analytica will provide social media services, capital markets consultation, and social engagement reporting for an initial six-month term for a fee of $150,000, payable in two tranches. The engagement remains subject to the approval of TSXV.