Arizona Sonoran Copper Cactus Project PFS Technical Report Reporting Post-Tax NPV8 of US$2.30 Billion and IRR of 22.8% is now Filed

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[{"type":"text","content":"CASA GRANDE, Ariz. & TORONTO / Nov 19, 2025 / Business Wire / Arizona Sonoran Copper Company Inc. (TSX:ASCU | OTCQX:ASCUF) (“ASCU” or the “Company”) has filed the Cactus Project NI 43-101 Pre-feasibility Study (“PFS”) technical report on SEDAR+ (www.sedarplus.ca) under the Company's issuer profile and is also available on the company website (www.arizonasonoran.com). Per the Company’s press release dated OCT 20, 2025, the PFS outlines a long-life, economically viable conventional copper operation utilizing open-pit mining and heap leach SXEW processing to produce LME Grade A copper cathode onsite for a meaningful contribution to refined copper supply in the U.S.A. All dollar amounts referenced herein are U.S. dollars, and all references to tons are imperial or short tons, unless otherwise noted; 1 short ton equals approximately 0.91 metric tonnes. Highlights include: Simple open‑pit / conventional SXEW operation producing approximately 103,000 tonnes (226 million lbs) of estimated average annual copper cathode production over the first 10 years of mining, which would make Cactus the third largest cathode producer in the USA Industry-leading capital intensity of $10,894 per tonne of copper cathodes produced $574 million of average annual EBITDA1 Strong economics to support the continued development of Cactus with a focus on simplicity and executability of the open-pit copper cathode project, on private land in Arizona Cactus Project is well positioned over the 22-year operational mine life to generate value at a variety of copper prices: Copper Price Assumption Base Case $4.25/lb Cu COMEX Assumed Spot Pricing $5.00/lb Cu1 NPV8% (after-tax) $2,301 $3,343 IRR (after-tax) 22.8% 28.7% Payback (after-tax) 5.3 years 4.5 years Initial Capital Expenditures $977 million $977 million NPV:CAPEX Ratio 2.4:1 3.4:1 LoM Gross Revenue $16,948 million $19,939 million LoM FCF (unlevered after-tax) $7,162 million $9,451 million - Conventional, Cost effective Mining and Processing: Open-pit, Heap Leach and SXEW Operation with Oxide and Enriched Materials from Cactus and Parks/Salyer open pits over 22 years of operations Cash costs (C1)2 of $1.34/lb, All in Sustaining Costs (“AISC”) of $1.62/lb and All in Costs (“AIC”)1 of $2.01/lb - Initial mineral reserves of 513 million tons at a grade of 0.52% Total Copper in the Proven and Probable category ...

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