Cobre del Mayo, S.A. de C.V. Announces Exchange Offer

The New Notes will be fully, unconditionally and irrevocably guaranteed by certain direct and indirect wholly owned subsidiaries of our parent company, Frontera Copper Corporation, S.A.P.I. de C.V. ("Frontera"), but will not be guaranteed by Frontera. The New Notes will be fully, unconditionally and irrevocably guaranteed by certain direct and indirect wholly owned subsidiaries of our parent company, Frontera Copper Corporation, S.A.P.I. de C.V. (" Frontera "), but will not be guaranteed by...

The New Notes will be fully, unconditionally and irrevocably guaranteed by certain direct and indirect wholly owned subsidiaries of our parent company, Frontera Copper Corporation, S.A.P.I. de C.V. ("Frontera"), but will not be guaranteed by Frontera.

BCP Securities, Inc. is acting as Dealer Manager for the Exchange Offer. Ipreo LLC is acting as Exchange Agent and Information Agent for the Exchange Offer.

Available Documents and Other Details

The New Notes have not been and will not be registered under the Securities Act or any state securities laws.  Accordingly, the Exchange Offer is only being made to registered holders of Existing Notes outside of the United States pursuant to Regulation S under the Securities Act or otherwise to, or for the account or benefit of, non-U.S. persons (as defined in Regulation S) in accordance with Regulation S ("Eligible Holders").

Eligible Holders who wish to review the Confidential Exchange Offer Memorandum, dated July 22, 2025 (the "Statement"), should contact Ipreo LLC, the Exchange Agent and the Information Agent for the Exchange Offer, at 55Water Street, 39th Floor, New York, New York 10041, Attention: Aaron Dougherty, e-mail: [email protected], banks and brokers call at +1 (212) 849-3880, toll-free at +1 (888) 593-9546.  Eligible Holders may also contact James Harper of BCP Securities, Inc. at +1 (203) 629-2186 or at [email protected].

The complete terms and conditions of the Exchange Offer are set forth in the informational documents relating to the Exchange Offer.  This press release is for informational purposes only and is not an offer of securities for sale in the United States or elsewhere. The New Notes may not be offered or sold in the United States absent registration or an exemption from registration. The Exchange Offer is not being made to any holder of Existing Notes in any jurisdiction in which the making or acceptance thereof would not be in compliance with the securities, blue sky or other laws of such jurisdiction.

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