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Silverco Mining Provides Corporate and Operational Update on the Cusi Property in Mexico Following Listing

Mine Development & Operations

Silverco Mining Provides Corporate and Operational Update on the Cusi Property in Mexico

Following Listing

Vancouver, B ritish Columbia – October 28, 2025 –Quetzal Copper Corp. (doing business as

Silverco Mining Ltd.) (“Silverco” or the “Company”) (TSXV: SICO) is pleased to provide a corporate

and operational update following the successful completion of its listing on the TSXV Venture

Exchange (the “TSXV”) via its reverse takeover by Silverco Mining Corp. on October 17, 2025.

The Company is pleased to be publicly trading, having established a strong shareholder base, a

solid cash position, and a clear path toward expected production in H2 2026 from its Cusi Property

in Chihuahua State, Mexico.

Key Highlights:

• Advancing the Cusi Property: The 100%-owned Cusi Property in Chihuahua State, Mexico

includes a fully permitted underground silver, lead, zinc mine (approximately 85% of the

recovered metal by value was silver in 2022) (the “Cusi Mine”), with a 1,200 tonnes per day

mill. The past producing Cusi Mine was put on care and maintenance in 2023 due to low

silver prices.

• Capital Raised : Silverco r aised C$ 25 million privately over the previous 18 months ,

including the most recent financing, which was over -subscribed, which enabled it to

significantly advance the Cusi Property prior to the TSXV listing.

• Significant Drill Program Underway on the Cusi Property: A 15,000-metre drill program is

currently underway, with two drill rigs on site. Consistent drill results are expected through

Q4 2025 to Q1 2026. A 5,000-metre drill program was completed in 2024.

• New Mining Zone: Silverco has acquired the San Miguel and La Bamba inset claims which

were not held during the previous production of the Cusi Mine. These acquisitions provide

a third mining zone which is expected to enable increased mining tonnage.

• Resource Estimate & Preliminary Economic Assessment: Silverco expects to complete a

mineral resource estimate on the Cusi Property under National Instrument 43 -101 –

Standards of Disclosure for Mineral Projects (“NI 43-101”) in Q4 2025 and a preliminary

economic assessment under NI 43-101 on the Cusi Property in Q1 2026, with a view to

supporting planned production in H2 2026.

• Company Vision: Management’s vision is to transform Silverco into a 10+ million-ounce

silver producer in the next three years through the development and production of the

Cusi Property, potential expansion and accretive acquisitions.

Mark Ayranto, CEO of Silverco commented: "The completion of our listing on the TSXV marks a major

milestone for Silverco. With a strong treasury, an experienced technical team, and a high -quality asset

in the fully permitted Cusi Property, we are well positioned to execute on our plan to enter production

in the second half of 2026 . Our 2025 drilling campaign is already underway, and we look forward to

delivering consistent results."

About the Cusi Property

The 100%-owned Cusi Property, located in Chihuahua State, Mexico, includes a fully permitted,

past-producing underground silver, lead, and zinc mine with a 1,200 -tonne-per-day mill, where

silver accounted for approximately 85% of the value of recovered metals in 2022.

Recent consolidation of claims along the San Miguel Vein System brings the total size of the Cusi

Property to 11,665 hectares, hosting several historic silver, gold, lead, and zinc deposits.

A historical mineral resource estimate (the “Historical MRE”) was completed on the Cusi Property

in 2022 and is summarized in Table 1 below.

Table 1. 2020 Mineral Resource Estimate

Classification

Tonnes AgEq Ag Au Pb Zn

(1,000s) (g/t) (g/t) (g/t) (%) (%)

Measured 850 231 213 0.06 0.26 0.30

Indicated 4,506 212 176 0.13 0.54 0.63

Measured + Indicated 5,356 215 182 0.12 0.49 0.58

Inferred 4,893 183 146 0.18 0.43 0.69

Variable density assigned by zone ranging from 2.51 t/m3 to 2.73 t/m3

Cut-off of 95 g/t AgEq

Price

(US$)

Recovery

(%)

Ag 20/oz 87

Au 1,541/oz 57

Zn 1.07/lb 51

Pb 0.91/lb 86

Source: Ortiz et al. (2020)

The Historical MRE is not a current mineral resource under NI 43-101. A Qualified Person has not

done sufficient work to make the Historical MRE current, and the Company is not treating the

Historical MRE as current.

The Historical MRE is disclosed in the Company’s technical report on the Cusi Property (the

“Technical Report”) titled “NI 43-101 Technical Report – Cusi Property, Chihuahua, Mexico” with an

effective date of May 1, 2025. The summary of the Historical MRE in this news release is qualified

in its entirety by the Technical Report, which is available on the Company’s profile on SEDAR+.

Strategically situated within the prolific Sierra Madre Occidental belt, on trend with Los Gatos and

Parral (see Figure 1), the Cusi Property benefits from excellent infrastructure, including paved

highway access and connection to the national power grid.

Figure 1. Cusi Property located along the Sierra Madre Occidental belt hosting many major deposits

Drilling and Exploration Update

Following the acquisition of the Cusi Mine in 2024, Silverco completed a 5, 500-metre drill

campaign focused on the San Miguel and La Bamba inset claims, as well as downthrown extensions

at Eduwiges. Results from the 2024 program are expected shortly and are anticipated to confirm

the continuity of mineralization and highlight significant potential for resource expansion.

A 15,000-metre drill program is now underway with two rigs actively turning, targeting high-grade

zones within newly discovered downthrown blocks. Additional drilling will continue through year-

end 2025, with results expected between Q4 2025 and Q1 2026.

Upcoming Milestones & Long-Term Vision

The Company plans to release its maiden resource estimate, incorporating both new and historical

data, in Q4 2025, followed by an expected mine plan and supporting economic study in Q1 2026

to guide the restart strategy. Subject to exploration results and market conditions, the Company

is targeting a production restart in H2 2026.

Looking ahead, Silverco’s vision is to become a 10+ million-ounce annual silver producer within

three years , through initial development and optimization of the Cusi Property and accretive

acquisitions that add both ounces and shareholder value.

Highly Experienced Team

The Company’s management and directors comprise:

• Mark Ayranto, President, CEO & Director: Accomplished mining executive, including the

former COO of Victoria Gold, where he led the development and construction of the Eagle

Mine into production.

• Sean Fallis, CFO & Corporate Secretary : CPA, CA with extensive leadership at mining

companies with projects in Latin America. He was a key member of the management team

of Sierra Wireless which was sold to Semtech for $C1.8 billion in 2023.

• Nico Harvey, VP Project Development: Mining engineer experienced in open -pit and

underground operations, including as the former Head of T echnical Services at Victoria

Gold.

• Tim Sorensen, Director: Over 25 years of experience in institutional equity sales with a

specialized focus on the mining sector. He currently serves as CEO of TSCG Capital, a

mining-focused merchant bank.

• Gary Brown, Director: Former CFO of Wheaton Precious Metals, which is one of Canada’s

20 largest companies by market capitalization.

• Gregg Bush, Director: COO of Heliostar Metals and m etallurgical engineer with over 40

years of experience in feasibility, mine development, and project engineering.

Qualified Person

In accordance with NI 43 -101, Nico Harvey, the Vice President, Project Development of the

Company, is the Qualified Person for the Company and has validated and approved the technical

and scientific content of this news release.

About Silverco

The Company owns a 100% interest in the 11,665-hectare Cusi Property, located in Chihuahua

State, Mexico (the “Cusi Property”), within the highly prolific Sierra Madre Occidental gold -silver

belt. The Cusi Property features a permitted, past -producing underground silver -lead-zinc-gold

mine and includes an existing 1,200-tonne-per-day mill with permitted tailings capacity.

Situated approximately 135 kilometers west of Chihuahua City, the Cusi Property benefits from

excellent infrastructure, including paved highway access and a 33 kV connection to the national

power grid. The Cusi Property encompasses multiple historical Ag -Au-Pb-Zn producing mines,

each developed along several vein structures, and hosts numerous high -potential exploration

targets. These include extensions of newly identified downthrown mineralized blocks and further

opportunities through claim consolidation, offering significant potential for resource expansion.

Contact Information

Mark Ayranto

President and CEO

Phone: (778) 888-4010

silvercomining.com

[email protected]

Cautionary Note Regarding Forward-Looking Statements

This news release contains statements that constitute “forward -looking statements.” Such forward looking

statements involve known and unknown risks, uncertainties and other factors that may cause the Company’s

actual results, performance or achievements, o r developments to differ materially from the anticipated results,

performance or achievements expressed or implied by such forward -looking statements. Forward looking

statements are statements that are not historical facts and are generally, but not always , identified by the words

“expects,” “plans,” “anticipates,” “believes,” “intends,” “estimates,” “projects,” “potential” and similar expressions, or

that events or conditions “will,” “would,” “may,” “could” or “should” occur.

Forward-looking statements in this document include, among others, statements relating to future exploration and

development plans, the future mineral production, liquidity, enhanced value capital markets profile of the

Company, the future growth potential for the Company and its business and other statements that are not

historical facts. By their nature, forward -looking statements involve known and unknown risks, uncertainties and

other factors which may cause our actual results, performance or achievemen ts, or other future events, to be

materially different from any future results, performance or achievements expressed or implied by such forward -

looking statements. Such factors and risks include, among others: the Company may require additional financing

from time to time in order to continue its operations which may not be available when needed or on acceptable

terms and conditions acceptable; compliance with extensive government regulation; domestic and foreign laws

and regulations could adversely affect the Company’s business and results of operations; and the stock markets

have experienced volatility that often has been unrelated to the performance of companies and these fluctuations

may adversely affect the price of the Company’s securities, regardless of its operating performance.

The forward-looking information contained in this news release represents the expectations of the Company as of

the date of this news release and, accordingly, is subject to change after such date. Readers should not place undue

importance on forward -looking information and should not rely upon this information as of any other date. The

Company undertakes no obligation to update these forward -looking statements in the event that management’s

beliefs, estimates or opinions, or other factors, should change.

Neither the TSX Venture Exchange nor its Regulation Services Provider (as defined in the policies of the TSX

Venture Exchange) accepts responsibility for the adequacy or accuracy of this news release.