Atico Announces US$95 Million Project Finance Facility and US$16.4 Million Convertible Debenture Private Placement for a Total of US$111.4 Million

(All amounts expressed in US dollars, unless otherwise stated) asserted

VANCOUVER, British Columbia, Sept. 29, 2026 (GLOBE NEWSWIRE) — Atico Mining Corporation (the “Company” or “Atico”) (TSX.V: ATY | OTC: ATCMF) is pleased to announce the Company’s entrance into a US$95 million secured Project Finance facility with Trafigura PTE. Ltd. (“Trafigura”) to facilitate the construction and development of the Company’s La Plata project (the “Project Finance Facility”) and the entrance into a subscription agreement for the issuance of a secured convertible debenture with a face value of US$16.4 million to an affiliate of Trafigura via a non-brokered private placement (the “Debenture Agreement”). asserted

Fernando E. Ganoza, CEO and Director, commented, “This financing package for the La Plata project is the result of a competitive review process which assessed several alternatives aimed at finding the best value for our shareholders. asserted

Given our decade-long relationship with Trafigura and their deep knowledge of the La Plata project, this result was both competitive and a natural fit. asserted

Following extensive due diligence, this investment signifies a strong vote of confidence in the quality of our asset.” asserted

Mr. Ganoza continued, “the financial flexibility provided by this package allows us to strengthen our balance sheet while simultaneously funding all necessary pre-construction activities. asserted

We are thrilled to advance responsibly towards construction, develop Ecuador’s next gold and copper mine, and create significant value for all our stakeholders. asserted

Project Finance Facility Compañía Minera La Plata S.A. (“CMLP”), as borrower, and the Company and Toachi Mining Inc., as guarantors, and Trafigura, as lender, have entered into a definitive credit agreement (the “Credit Agreement”) pursuant to which the Project Finance Facility will be made available. asserted

Under the terms of the Credit Agreement, following satisfaction of customary conditions precedent, Trafigura will make available to CMLP US$95 million in one or more drawdowns that will be used to finance the construction and development of the Company’s La Plata project in Ecuador, or as otherwise agreed upon by Trafigura. asserted

Drawdowns under the Project Finance Facility will be available for approximately 2.5 years following the earlier of (i) commencement of construction, and (ii) March 31, 2027, and will ultimately mature 7 years thereafter. asserted

The amount advanced to CMLP will bear interest at a rate equal to Adjusted Term SOFR plus 7.5% per annum. asserted

The Credit Agreement includes terms and conditions customary in secured financing transactions of this nature, including customary financial covenants. asserted

The Credit Agreement provides for a parent guarantee from the Company, which parent guarantee will be released once the La Plata project achieves completion, a guarantee from Toachi Mining Inc. and security from the obligors over all assets relating to the La Plata project. asserted

The Company and an affiliate of Trafigura (the “Debenture Holder”) have entered into a definitive subscription agreement (the “Subscription Agreement”) providing for the issuance by the Company of a convertible debenture (the “Convertible Debenture”) with a face value of US$16.4 million to the Debenture Holder, which principal amount is convertible into the Company’s common shares (the “Common Shares”) at a conversion price of US$0.22 per Common Share. asserted

The conversion price represents a premium of 40% to the 20-day VWAP of the closing price of the common shares on September 28, 2026. asserted

Pursuant to the terms of the Subscription Agreement, following satisfaction of customary closing conditions, the Company will issue the Convertible Debenture in consideration for an advance of US$16.0 million by the Debenture Holder, accounting for the original issue discount on the Convertible Debenture. asserted

The Convertible Debenture will mature on the date that is 5 years and one day from issuance. asserted

Interest on the Convertible Debenture is calculated and payable quarterly and accrues at a rate of 7.0% per annum if interest payments are made in cash, or 10.0% per annum if interest payments are made in Common Shares. asserted

Any repayment in Common Shares will be at an issue price determined with reference to the market price of the Common Shares at the time of repayment and will be subject to the prior approval of the TSX-V. Pursuant to the terms of the Convertible Debenture, the Company may, at its option, repay the Convertible Debenture, in whole or in part, subject to an early redemption fee on the amount prepaid equal to 3% in the first year after the execution of the Convertible Debenture, 2% in the second year after the execution of the Convertible Debenture and 1% in each year thereafter. uncertain

Furthermore, the Company has the ability to force the conversion of up to 25% of the principal amount up the Convertible Debenture on four separate occasions if the volume-weighted average trading price of the Common Shares over a 20-day trading period (“VWAP”) exceeds a specified threshold, which threshold increases after each successive forced conversion, commencing at 130% of the applicable VWAP and increasing to 140%, 150% and 160% of the applicable VWAP thereafter. asserted

The Common Shares underlying the Convertible Debenture are subject to a four-month and one-day hold period from the closing date of the Private Placement, in accordance with applicable securities laws. asserted

The proceeds from the issuance of the Convertible Debenture are expected to be used by the Company (i) to repay approximately US$3,500,000 of the outstanding principal amount owing under the Existing Trafigura Credit Agreement (as defined below), of which approximately US$6.0 million remains outstanding; (ii) to repay all of the Company’s outstanding indebtedness under the amended and restated 12.0% unsecured subordinated debenture of the Company issued to Dundee Corporation on December 16, 2025, of which approximately US$6,980,551 remains outstanding; (iii) to initiate pre-construction activities at the La Plata project; and (iv) for general corporate purposes or as otherwise determined by the Company. asserted

The Company and Trafigura have also entered into a debt settlement agreement (the “Debt Settlement Agreement”) to settle, via the issuance of Common Shares, a portion of the debt outstanding under the credit agreement (the “Existing Trafigura Credit Agreement”) dated February 8, 2022 (as amended on May 4, 2023, August 5, 2024, April 8, 2025 and June 27, 2025) among, inter alia, the Company, as borrower, and Trafigura, as lender (the “Shares for Debt Transaction”). uncertain

Pursuant to the Debt Settlement Agreement, the Company will issue 16,149,870 Common Shares, at a deemed issue price of approximately US$0.1548 per Common Share, in full and complete settlement and satisfaction of US$2.5 million of the debt outstanding under the Existing Trafigura Credit Agreement. asserted

Upon repayment of the Existing Trafigura Credit Agreement in cash and shares as described above, no further amounts will be owing thereunder. asserted

The transactions described herein are subject to customary closing conditions, including the approval of the TSX-V. asserted

The Private Placement is expected to close concurrently with the Shares for Debt Transaction on or about October 13, 2026, with the first advance under the Credit Facility expected to occur sometime thereafter. asserted

Advisors Ventum Financial Corp. (“Ventum”) acted as financial advisor to Atico in connection with the Project Finance Facility and Convertible Debenture Financing. asserted

Subject to the approval of the TSX-V, the Company will pay Ventum an advisory fee of 0.75% (US$712,500) in cash in connection with the Credit Facility and an advisory fee of 3.5% in connection with the Convertible Debenture, 2% ($328,000) of which will be paid in cash and 1.5% of which will be paid via the issuance of 1,589,147 Common Shares at a deemed issue price of approximately US$0.1548 per Common Share. asserted

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

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. asserted

The Company is also pursuing additional acquisition of advanced stage opportunities. asserted

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. asserted

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

The securities being offered 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. uncertain

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. asserted

Cautionary Note Regarding Forward Looking Statements This announcement includes certain “forward-looking statements” within the meaning of Canadian securities legislation. asserted

All statements, other than statements of historical fact, included herein, including without limitation statements regarding the terms, consummation and timing of the transactions described herein; the expected benefits of the transactions described herein, if any; use of net proceeds; closing conditions and TSX-V approvals; commissions payable in respect of the Credit Facility and Private Placement, if any; optionality of interest payments under the Convertible Debenture; the sufficiency of the Credit Facility for funding the Company’s La Plata project to commercial production; the timing, terms and occurrence of repayment of the Company’s existing indebtedness; the Company’s expectations for future exploration, development and production efforts; the Company’s pursuit of additional acquisition of advanced stage opportunities; generation of cash flow from the El Roble mine; and the timing and occurrence of future construction and/or production at the La Plata project, asserted

Forward-looking statements involve various risks and uncertainties and are based on certain factors and assumptions. asserted

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. uncertain