Silverco Mining Ltd. (TSX-V: SICO) (OTCQB: SICOF) is pleased to report further significant intercepts on fifteen holes from its ongoing 30,000 metre drill program at its 100% owned Cusi Property in Chihuahua, Mexico. The primary goal of the drill program is to target high potential targets for resource growth and infill high-priority resources in Promontorio and San Miguel to optimize mine planning and support a Mineral Resource update planned for H1 2027.

Highlights:

• UGCU26-09 – 1,222 grams per tonne Silver Equivalent¹  over 3.35 metres true width or (1,280 g/t Silver, 0.42 g/t Gold, 1.28% Lead and 1.49% Zinc).
  • Including 5,392 g/t AgEq over 0.65 mTW (5,729 g/t Ag, 1.69 g/t Au, 3.09% Pb and 5.63% Zn).
  • And 1,096 g/t AgEq over 1.28 mTW (1,103 g/t Ag, 0.48 g/t Au, 1.59% Pb and 2.78% Zn).
    • Including 3,574 g/t AgEq over 0.37 mTW (3,645 g/t Ag, 1.64 g/t Au, 4.11% Pb and 7.75% Zn).
• UGCU26-10 – 737 g/t AgEq over 4.18 mTW (632 g/t Ag, 1.17g/t Au, 4.79% Pb and 1.26% Zn).
  • Including 1,198 g/t AgEq over 1.79 mTW (916 g/t Ag, 2.69 g/t Au, 10.67% Pb and 2.53% Zn).
  • And 1,134 g/t AgEq over 0.60 mTW (1,225 g/t Ag, 0.03 g/t Au, 0.89% Pb and 0.64% Zn).
• UGCU26-14 – 616 g/t AgEq over 1.55 mTW (597 g/t Ag, 1.35 g/t Au, 0.91% Pb and 0.32% Zn).
  • Including 995 g/t AgEq over 0.90 mTW (975 g/t Ag, 2.20 g/t Au, 1.06% Pb and 0.42% Zn).
• CU-26-80 – 306 g/t AgEq over 5.36 mTW (330 g/t Ag, 0.14 g/t Au, 0.11% Pb and 0.03% Zn).
• CU-26-81 – 982 g/t AgEq over 1.38 mTW (1,075 g/t Ag, 0.04 g/t Au, 0.24% Pb and 0.45% Zn).

Mark Ayranto, CEO of Silverco, commented:

“Our ongoing 30,000-metre drill program at Cusi continues to deliver significant silver mineralization within the planned first-year mining areas outlined in the Preliminary Economic Assessment². The standout intercept from hole UGCU26-09 confirmed more high-grade mineralization over meaningful widths at Promontorio, one of our initial mining zones. This intercept is located 20 metres south from hole UGCU26-08, another recent high-grade intercept reported on July 7, 2026, that is also within our current mine plan for 2027.

These results further validate the continuity of high-grade mineralization at Cusi and highlight the potential to expand resources both within and adjacent to the planned mining footprint. The consistent delivery of high-grade intersections in key development areas presents a compelling opportunity to enhance the early years of the mine plan and potentially increase the project value. Looking ahead, exploration efforts will continue throughout 2026 across the Promontorio, San Miguel, and San Juan targets, supporting the planned restart of production in Q4 2026 and the delivery of an updated Mineral Resource Estimate in the H1 2027.”

Figure 1- Property map and location

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Figure 2 – Geology plan map with drill hole locations

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Figure 3 – Longitudinal section (Looking West) at Promontorio showing AgEq g/t X mTW with underground drill hole intercepts.


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Figure 4 – Cross section showing drill hole intercepts at Promontorio


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Details of the 2026 Cusi Exploration Program

The 2026 Cusi exploration program includes 30,000 metres of diamond drilling, split between underground (10,000 metres) and surface drilling (20,000 metres). The program’s primary goals are to:

1. Infill prospective areas which are targeted for mining early in the planned restart at Promontorio and San Miguel;
2. Expand known areas of mineralization at San Miguel
3. Explore prospective targets at San Miguel, Eduwiges, and San Juan.

With success, this program could enhance mine planning for the initial years of the planned restart by identifying opportunities to increase mineral resources in these areas and in new target areas as part of a planned H1 2027 Cusi resource update.

Detailed drill results, along with notable assays results are provided in Tables 1 and 2. Going forward, and as a result of a better understanding of the deposits, Silverco will report true widths for mineralized intervals, to the extent known, in order to provide the readers with more accurate information regarding the geometry of the mineralization. Therefore, the reported intervals herein are not directly comparable in terms of width, to previous news releases that reported only interval length.

Table 1: Significant Assay Results from the 2026 Drill Program

250440201186167140207

 Notes:

1. AgEq = Ag g/t x Ag Recovery + [(Au g/t x Au Rec x Au price/gram)+(Pb% x Pb rec. X Pb price/t) + (Zn% x Zn rec. X Zn price/t)]/Ag price/gram. Metal price assumptions are: $30.00/oz silver, $2,400/oz gold, $1.00/lb lead, $1.35/lb zinc. Metallurgical recovery assumptions are 90% for silver, 50% for gold, 90% for lead, and 60% for zinc. Metallurgical recoveries used in this release are based on historical operational results on the Cusi project.
2. Reported intervals are true widths.
3. 21 diamond drill holes were drilled – holes CU-26-84, CU-26-85, CU-26-86, CU-26-87 and CU-26-88 intercepted the target structure with Non-Significant Values.

Table 2: Drill Collar Location

 Notes:

1. UTM coordinates, Datum WGS84 and elevation in metres above sea level.
2. Hole azimuths and dips are based on average of surveyed intervals.
3. 21 diamond drill holes were drilled – holes CU-26-84, CU-26-85, CU-26-86, CU-26-87 and CU-26-88 intercepted the target structure with Non-Significant Values.

Geology and Mineralization

Mineralization at Cusi occurs in veins with mineralogical characteristics and alteration assemblages typical of low to intermediate sulfidation epithermal deposits. Silver, gold, lead, and zinc mineralization occurs along faults and open fractures containing quartz, sphalerite, and galena, with wall rock alteration characterized by silicification, clay development, and iron oxides.

Vein mineralization occurs on structural features such as fault-breccias and fractures, which can range in width from under 1 m to over 10 m. Mineralization at Promontorio occurs predominantly in northeast and north-south trending veins. Raquel vein is one of the north-south veins located between Santa Rosa de Lima fault-vein and Carolina fault-vein and has been mined to only approximately 100 m below surface. Recent drilling completed by Silverco has confirmed high grades below the mined-out levels which are expected to support the initial production plans at Cusi.

San Juan, located approximately 600 m northwest of Promontorio, is a northeast trending vein dipping northwest with average thickness of 1.85 m that has been drilled on both sides of the Santa Rosa de Lima fault-vein. However, recent drilling suggests that shallower and higher silver grades occur on the footwall side (northeast) of the Santa Rosa de Lima fault-vein.

Drilling at San Miguel, located approximately 1.5 kilometres southeast from Promontorio, has revealed the presence of multiple vein splays with significant silver grade on the hanging wall and footwall sides of the vein. San Miguel is a northeast trending vein, dipping to the southeast with average thickness of 1.8 m, although maximum widths of over 10 m have been intercepted.

The ongoing exploration drilling at Promontorio, San Juan and San Miguel areas will support an updated Mineral Resource Estimate planned for H1 2027.

Planned Cusi Restart 

As outlined in an August 4, 2026 news release, the Company is on track to restart operations and ship first concentrate from Cusi in Q4 2026. This planned restart is supported by the results from the PEA² which outlined a project with average annual silver equivalent production of 2.47 Moz at site all-in-sustaining costs of US$26.75/oz payable AgEq from 2028 to 2032, once fully ramped up. With close to 90% of the revenue generated from silver and low upfront capital of US$19.2 million, Cusi represents a unique opportunity in the silver industry and for Silverco to advance its vision of becoming a 10 million ounce per year silver equivalent producer within three years.

Quality Assurance/Quality Control and Sampling Procedures

All diamond drill core from the 2026 program at the Cusi Project is logged, photographed, and sawn in half using a diamond blade core saw. One half of the core is submitted for geochemical analysis, while the other half is retained in secure storage for reference. Sampling intervals are determined based on geological boundaries and typically range from 0.3- 1.5 metres. Control samples comprise approximately 18% of all samples submitted, including certified reference standards, analytical blanks, field duplicates, preparation duplicates and analytical duplicates. QA/QC results are reviewed in real time, and all data is verified as meeting acceptable thresholds for accuracy, precision, and contamination before inclusion in this release.

Drill core and rock samples are sent to ALS Minerals for analysis with sample preparation in Chihuahua, Mexico and analysis in North Vancouver, British Columbia. Samples remain under Company custody until delivery to ALS; sealed bags are transported by Company personnel to ALS Chihuahua. The ALS Chihuahua and North Vancouver facilities are ISO/IEC 17025 certified. Samples are dried, weighed, and crushed to at least 70% passing 2mm, and a 250 g split is pulverized to at least 85% passing 75 μm (PREP-31). Silver and base metals are analyzed using a four-acid digestion and ICP-AES. Over-limit analyses for silver (>100 ppm), lead (>10,000 ppm), and zinc (>10,000 ppm) are re-assayed using an ore-grade four-acid digestion and ICP-AES (ME-OG62). Samples with over-limit silver assays > 1500 ppm are analyzed by 30-gram fire assay with a gravimetric finish (Ag-GRA21). Gold is assayed by 30-gram fire assay and AAS (Au-AA23).

Technical Disclosure

The scientific and technical information contained in this news release has been reviewed and approved by Nico Harvey, P.Eng., Vice President Project Development of Silverco, a Qualified Person as defined in National Instrument 43-101. Mr. Harvey is not independent of the Company. Mr. Harvey has reviewed the sampling, analytical and QA/QC data underlying the technical information disclosed herein.

About Silverco Mining Ltd.

Silverco Mining Ltd. is a Canadian silver producer focused on building a leading multi-asset silver portfolio in Mexico. The Company owns 100% of the producing La Negra Mine in Querétaro and the past-producing Cusi Silver Complex in Chihuahua, two established underground mines with significant infrastructure, exploration upside, and district-scale land positions. The Company is restarting production at Cusi in H2 2026, positioning Silverco to become a significant primary silver producer in the Americas in the near term.

Led by an experienced management team with a proven track record in mine development, operations, and capital markets, Silverco is focused on creating long-term shareholder value through disciplined growth and responsible mining practices, with a goal of becoming a 10-million-ounce per year silver equivalent producer within three years. Silverco’s common shares trade on the TSX Venture Exchange under the symbol “SICO” and on the OTCQB under the symbol “SICOF.” More information on the Company and its projects can be found at www.silvercomining.com.

On Behalf of the Board of Directors

“Mark Ayranto”

Mark Ayranto, President & CEO
Email: mayranto@silvercomining.com

For further information, please contact:

Investor relations & Communications
Email: info@silvercomining.com
www.silvercomining.com