SONORO ANNOUNCES UPDATED MINERAL RESOURCE ESTIMATE AND ROBUST UPDATED PEA FOR CERRO CALICHE GOLD PROJECT: AFTER-TAX NPV OF USD $224 MILLION AND AFTER-TAX IRR OF 50%

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[{"type":"text","content":"SONORO ANNOUNCES UPDATED MINERAL RESOURCE ESTIMATE AND ROBUST UPDATED PEA FOR CERRO CALICHE GOLD PROJECT: AFTER-TAX NPV OF USD $224 MILLION AND AFTER-TAX IRR OF 50%\nVANCOUVER, Canada, Feb. 28, 2026 (GLOBE NEWSWIRE) -- Sonoro Gold Corp. (TSXV: SGO | OTCQB: SMOFF | FRA: 23SP) (“Sonoro” or the “Company”) is pleased to announce the results of an independent updated Mineral Resource Estimate (“MRE”) and updated Preliminary Economic Assessment (“PEA”) on the Company’s Cerro Caliche gold project located in Sonora State, Mexico. The PEA demonstrates the potential viability for a ten-year life of mine (“LOM”), open pit, heap leach mining operation with an initial one-year ramp up production rate of 12,000 tonnes per day (“tpd”) and an increase to 16,000 tpd for the remaining LOM. All currency is stated as USD. The updated MRE and PEA have been prepared in accordance with the requirements of National Instrument 43-101 (“NI 43-101”) by P&E Mining Consultants Inc., of Brampton, Ontario (“P&E”). Updated PEA Highlights: Base Case Prices of $3,500/oz gold and $48/oz silver Pre-Tax net present value discounted at 8% (“NPV8”) of $360 millionPre-Tax Internal Rate of Return (“IRR”) of 65%After-Tax NPV8” of $224 millionAfter-Tax IRR of 50% Spot Prices of $5,186/oz gold and $88/oz silver Pre-Tax NPV8 of $846 millionPre-Tax IRR of 121%After-Tax NPV8” of $525 millionAfter-Tax IRR of 91% Gold recovery of 72% and silver recovery of 27% 10-year LOM with 459 k ounces (“oz”) of gold equivalent (“AuEq”) LOM annual average production of 46 k oz AuEq at 0.38 g/t AuEq Initial CAPEX costs of $83 million, including $11 million in contingency Sustaining capital costs of $26 million Cash(1) operating costs of $1,842/oz AuEq AISC(2) of $1,902/oz AuEq Payback period of 1.7 years Note: All currencies are reported in U.S. dollars. Base case parameters assume $3,500/oz gold and $48/oz silver.(1) Cash operating costs include mining, crushing, processing, assaying, administration and royalties.(2) All-in-Sustaining Costs include cash costs plus sustaining capital and reclamation costs. “This updated PEA and MRE clearly illustrates a significant increase in value of the ...

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