Guanajuato Silver Renews Base Shelf Prospectus

VANCOUVER, BC / ACCESS Newswire / September 25, 2026 / Guanajuato Silver Company Ltd. (the "Company" or "GSilver") (TSXV:GSVR) announces that the Company filed and received a receipt for a final short form base shelf prospectus dated September 25, 2026 (the "Prospectus") with the securities regulatory authorities in each of the provinces and territories of Canada. The Prospectus replaces the Company's prior final short form base shelf prospectus dated August 21, 2024 which expired September 21, 2026.

The Prospectus permits the Company, if it so chooses, to offer up to US$65 million of common shares, debt securities, warrants, subscription receipts, share purchase contracts and units, or any combination thereof (collectively, the "Securities") during the 25-month period that the Prospectus is effective. The specific terms of any offering of Securities, including the use of proceeds from any offering, will be set forth in a shelf prospectus supplement, which would be filed with the applicable Canadian securities regulatory authorities at that time.

Chairman and CEO James Anderson commented: "Though we have no immediate plans to use the facility, the filing and receipt of this prospectus with the Canadian securities regulators gives Guanajuato Silver flexibility with regards to financing and growth opportunities for the next 25 months."

Securities may be offered under the Prospectus separately or together, in amounts, at prices and on terms to be determined based on market conditions at the time of sale and as set forth in an applicable prospectus supplement. The Company has not entered into any agreements or arrangements to authorize the sale, distribution or offer of any Securities and has no immediate plans to issue Securities under the Prospectus.

Copies of the Prospectus may be obtained on request without charge from the Company at Suite 578 - 999 Canada Place, Vancouver, BC V6C 3E1, telephone (604) 670-8460 and can be found under the Company's SEDAR+ profile at www.sedarplus.ca.

This press release does not constitute an offer to sell or a solicitation of an offer to buy, nor shall there be any sale of these Securities in any jurisdiction in which an offer, solicitation or sale would be unlawful prior to registration or qualification under the securities laws of any such jurisdiction. The securities being referred to in this press release have not been, nor will they be, registered under the United States Securities Act of 1933, as amended, and may not be offered or sold in the U.S. or to, or for the account or benefit of, U.S. persons absent registration or an applicable exemption from the registration requirements. No public offering of securities is being made in the United States. This press release does not constitute an offer to sell or the solicitation of an offer to buy nor shall there be any sale of the securities in any jurisdiction in which such offer, solicitation or sale would be unlawful.

About Guanajuato Silver

Guanajuato Silver is a precious metals producer with a portfolio of producing silver and gold mines in central Mexico. The Company has a core operational footprint of three operating silver-gold assets in the state of Guanajuato, which has an established 480-year mining history. Additionally, the Company produces silver, gold, lead, and zinc concentrates from the Topia mine in northwestern Durango.

ON BEHALF OF THE BOARD OF DIRECTORS
"James Anderson"
Chairman and CEO

For further information regarding Guanajuato Silver Company Ltd., please contact:

JJ Jennex, Gerente de Comunicaciones, T: 604 723 1433
E: jjj@GSilver.com
Gsilver.com

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.

Forward-Looking Statements

This press release contains certain forward-looking statements and information, which relate to future events or future performance including, the aggregate amount or number of Securities that may be offered pursuant to the Prospectus and any prospectus supplement; the filing and effectiveness of any potential prospectus supplement; the Company undertaking any offering of Securities under the Prospectus, including the amount and terms of any Securities to be offered; the use of proceeds of any offering of Securities; and the Company's status as one of the fastest growing silver producers in Mexico.

Such forward-looking statements and information reflect management's current beliefs and are based on information currently available to and assumptions made by the Company; which assumptions, while considered reasonable by the Company, are inherently subject to significant operational, business, economic and regulatory uncertainties and contingencies. These assumptions include: our estimates of the potential quantity, grade and metal content of the mineralized material at El Cubo, Bolanitos, VMC and San Ignacio, the geotechnical and metallurgical characteristics of such material conforming to sampled results and metallurgical performance; available tonnage of mineralized material to be mined and processed; resource grades and recoveries; assumptions and discount rates being appropriately applied to production estimates; prices for silver, gold and other metals remaining as estimated; currency exchange rates remaining as estimated; availability of funds for the Company's projects and to satisfy current liabilities and obligations including debt repayments; capital, decommissioning and reclamation estimates; prices for energy inputs, labour, materials, supplies and services (including transportation) and inflation rates remaining as estimated; no labour-related disruptions; no unplanned delays or interruptions in scheduled construction and production; all necessary permits, licenses and regulatory approvals are received in a timely manner; and the ability to comply with environmental, health and safety laws. The foregoing list of assumptions is not exhaustive.

Readers are cautioned that such forward-looking statements and information are neither promises nor guarantees, and are subject to risks and uncertainties that may cause future results, level of activity, production levels, performance or achievements of GSilver to differ materially from those expected including, but not limited to, market conditions, availability of financing, currency rate fluctuations, high inflation and interest rates, tariffs, geopolitical conflicts including wars, actual results of exploration, development and production activities, actual grades and recoveries of silver, gold and other metals from the Company's existing mines including El Cubo, Bolanitos, San Ignacio, VMC and Topia, availability of third party mineralized material for processing, unanticipated geological or structural formations and characteristics, environmental risks, future prices of gold, silver and other metals, operating risks, accidents, labor issues, equipment or personnel delays, delays in obtaining governmental or regulatory approvals and permits, inadequate insurance, and other risks in the mining industry. There are no assurances that GSilver will be able to continue to increase production, tonnage milled and recoveries rates, improve grades and reduce costs at El Cubo, Bolanitos, San Ignacio, VMC or Topia to process mineralized materials to produce silver, gold and other concentrates in the amounts, grades, recoveries, costs and timetable anticipated. In addition, GSilver's decision to process mineralized material from El Cubo, Bolanitos, San Ignacio, VMC and Topia is not based on a feasibility study of mineral reserves demonstrating economic and technical viability and therefore is subject to increased uncertainty and risk of failure, both economically and technically. Mineral resources and mineralized material that are not Mineral Reserves do not have demonstrated economic viability, are considered too speculative geologically to have the economic considerations applied to them, and may be materially affected by environmental, permitting, legal, title, socio-political, marketing, and other relevant issues. There are no assurances that the Company's projected grades of gold and silver at El Cubo, Bolanitos, VMC and San Ignacio and the anticipated level of production therefrom will be realized. In addition, there are no assurances that the Company will meet its production forecasts or generate the anticipated cash flows from operations to satisfy its scheduled debt payments or other liabilities when due or meet financial covenants to which the Company is subject or to fund its exploration programs and corporate initiatives as planned. There is also uncertainty about impact of any future global pandemic, ongoing global conflicts, elevated inflation and interest rates and the impact they will have on the Company's operations, supply chains, ability to access mining projects or procure equipment, contractors and other personnel on a timely basis or at all and economic activity in general. Accordingly, readers should not place undue reliance on forward-looking statements or information. All forward-looking statements and information made in this news release are qualified by these cautionary statements and those in our continuous disclosure filings available on SEDAR+ at www.sedarplus.ca including the Company's most recently filed annual information form. These forward-looking statements and information are made as of the date hereof and the Company does not assume any obligation to update or revise them to reflect new events or circumstances save as required by law.

SOURCE: Guanajuato Silver Company Ltd.