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Atico Produces 2.24 Million Pounds of Cu and 1,906 Ounces of Au in Third Quarter 2025

Production Results

Atico Produces 2.24 Million Pounds of Cu and 1,906 Ounces of Au in Third

Quarter 2025

VANCOUVER, British Columbia, Oct. 21, 2025 -- Atico Mining Corporation (the “Company” or “Atico”) (TSX.V: ATY | OTCQX:

ATCMF) announces its operating results for the three months ended September 30, 2025 from its El Roble mine. Production

for the quarter totaled 2.24 million pounds of copper and 1,906 ounces of gold in concentrates, a decrease of 23% for copper

and 8% for gold, respectively, over the same period in 2024.

“During the period, higher metal prices enabled profitable mining of ore from lower mine zones previously excluded from

reserves, leading to a quarterly revision of the mine plan to incorporate this out-of-reserve material. These areas of the deposit

are in the final months and are being prioritized to maximize overall ore recovery. The lower grade, newly converted reserves,

offset the contribution from the higher-grade upper zones, which percentage of feed to the mill has been consistently

increasing as development continues and more stopes enter production. Given the change in the mine plan, results for the

quarter were below budget, in particular for the copper head grade, which increased from the previous quarter but not as much

as initially forecasted,” stated Fernando E. Ganoza, CEO. “We anticipate production for the following quarter will improve

driven by higher copper head grade, even though we will continue to maximize ore recovery in the lower zones, as this

strategy, coupled with the current drill program, should help us increase the reserves and the life of mine.”

Third Quarter Operational Highlights

• Production of 2.24 million pounds of copper contained in concentrates; a decrease of 23% over Q3 2024.

• Production of 1,906 ounces of gold contained in concentrates; a decrease of 8% over Q3 2024.

• Average processed tonnes per day of 741, a decrease of 3% over Q3 2024.

• Copper head grade of 1.82%, a decrease of 14% over Q3 2024.

• Gold head grade of 1.53 grams per tonne; no significant change over Q3 2024.

• Copper and gold recovery of 91% and 63%; no significant change for copper and gold, respectively, over Q3 2024.

Third Quarter Operational Review

The El Roble mine has been undergoing a transition from the lower areas of the mine towards the new higher-grade reserves in

upper areas. This planned transition schedule has been changed to take advantage of higher metal prices and accommodate

adding lower grade ore not included in the current reserves report. Despite this change, new stope development in the upper

higher-grade areas continues to advance and improvement in head grades should continue quarter over quarter. These

changes will be reflected in the production and cost guidance for this year and revision to the same for 2025 will be as follows:

Copper (000s pounds) 9,000 to 9,500

Gold (ounces) 7,500 to 8,500

C1 Cash Cost ($US)(1) $1.70 to $1.80

Note: Please see “Non-GAAP Financial Measures” at the end of this release. C1 cash cost per pound of payable copper

produced net of by-product (gold) credits and selling costs.

The planned concentrate shipment, originally scheduled for September, was postponed to October due to limited vessel

availability during the quarter. Since the company recognizes revenue upon shipment of the concentrate, this development will

cause all expected revenue from this period to be recorded in the fourth quarter, alongside the planned revenue for that period.

Third Quarter Operational Details

Q3 2025

Total

Q3 2024

Total % Change

Production(Contained in Concentrates)      

Copper (000s pounds) 2,241 2,912 -23%

Gold (ounces) 1,906 2,072 -8%

Mine      

Tonnes of ore mined 61,005 67,869 -10%

Mill      

Tonnes processed 61,392 67,354 -9%

Tonnes processed per day 741 856 -3%

Copper grade (%) 1.82 2.13 -14%

Gold grade (g/t) 1.53 1.52 Nil

Recoveries      

Copper (%) 91.2 92.3 Nil

Gold (%) 62.9 62.9 Nil

Concentrates      

Copper and Gold Concentrates (dmt) 5,721 7,248 -21%

Payable copper produced (000s lbs) 2,102 2,737 -23%

Note: Metal production figures are subject to adjustments based on final settlement. The reported results are preliminary in

nature and are awaiting independent lab verification.

Concentrate Inventory

The number of shipments the Company can export in any given quarter depends on several variables some of which the

Company does not control, hence there may be an inherent variability in tonnes shipped quarter to quarter.

  Q3 2025 Total

Amounts in dry metric tonnes  

Opening inventory 969

Production 5,721

Sales 0

Adjustments (71)

Number of shipments 0

Closing inventory 6,619

Note: Concentrate figures are subject to adjustments based on final settlement.

El Roble Mine

The El Roble mine is a high grade, underground copper and gold mine with nominal processing plant capacity of 1,000 tonnes

per day, located in the Department of Choco in Colombia. Its commercial product is a copper-gold concentrate.

Since obtaining control of the mine on November 22, 2013, Atico has upgraded the operation from a historical nominal

capacity of 400 tonnes per day.

El Roble’s reserves estimate, with an effective date of March 12, 2024, includes Proven and Probable mineral reserves of 828

thousand tonnes averaging 2.49% Cu, 2.20 g/t Au and a life of mine until Q1-2027. A full NI 43-101 technical report is available

on SEDAR+. For more information on the reserves estimate refer to SEDAR+ and on the Company’s website.

Mineralization is open at depth and along strike and the Company plans to further test the limits of the deposit. On the larger

land package, the Company has identified a prospective stratigraphic contact between volcanic rocks and black and grey

pelagic sediments and cherts that has been traced by Atico geologists for ten kilometers. This contact has been determined

to be an important control on VMS mineralization on which Atico has identified numerous target areas prospective for VMS

type mineralization occurrence, which is the focus of the current surface drill program at El Roble. 

Qualified Person

Mr. Thomas Kelly (SME Registered Member 1696580), advisor to the Company and a qualified person under National

Instrument 43-101 standards, is responsible for ensuring that the technical information contained in this news release is an

accurate summary of the original reports and data provided to or developed by Atico.

About Atico Mining Corporation

Atico is a growth-oriented Company, focused on exploring, developing and mining copper and gold projects in Latin America.

The Company generates significant cash flow through the operation of the El Roble mine and is developing its high-grade La

Plata VMS project in Ecuador. The Company is also pursuing additional acquisition of advanced stage opportunities. For more

information, please visit www.aticomining.com .

ON BEHALF OF THE BOARD

Fernando E. Ganoza

CEO

Atico Mining Corporation

Trading symbols: TSX.V: ATY | OTCQX: ATCMF

Investor Relations

Igor Dutina

Tel: +1.604.633.9022

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

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

No securities regulatory authority has either approved or disapproved of the contents of this news release. The securities have

not been, and will not be, registered under the United States Securities Act of 1933, as amended (the ‘‘U.S. Securities Act’’),

or any state securities laws, and may not be offered or sold in the United States, or to, or for the account or benefit of, a "U.S.

person" (as defined in Regulation S of the U.S. Securities Act) unless pursuant to an exemption therefrom. This press release

is for information purposes only and does not constitute an offer to sell or a solicitation of an offer to buy any securities of the

Company in any jurisdiction.

Cautionary Note Regarding Forward Looking Statements

This announcement includes certain “forward-looking statements” within the meaning of Canadian securities legislation. All

statements, other than statements of historical fact, included herein, are forward-looking statements. Forward- looking

statements involve various risks and uncertainties and are based on certain factors and assumptions. There can be no

assurance that such statements will prove to be accurate, and actual results and future events could differ materially from

those anticipated in such statements. Important factors that could cause actual results to differ materially from the Company’s

expectations include uncertainties relating to interpretation of drill results and the geology, continuity and grade of mineral

deposits; uncertainty of estimates of capital and operating costs; the need to obtain additional financing to maintain its

interest in and/or explore and develop the Company’s mineral projects; uncertainty of meeting anticipated program milestones

for the Company’s mineral projects; and other risks and uncertainties disclosed under the heading “Risk Factors” in the AIF of

the Company dated September 4, 2024 filed with the Canadian securities regulatory authorities on the SEDAR+ website at

www.sedarplus.com

Non-GAAP Financial Measures

The items marked with a "(1)" are alternative performance measures and readers should refer to Non-GAAP Financial

Measures in the Company's Management's Discussion and Analysis for the year ended December 31, 2024, as filed on

SEDAR+ and as available on the Company's website for further details.