EDMONTON AB, September 24th, 2026 – Altiplano Metals Inc. (TSXV: APN) (WKN: A2JNFG) (“Altiplano” or the “Company”) provides an update on the legal actions initiated against two of the Company’s wholly owned Chilean subsidiaries, Andes Metals SpA and Altiplano Minerals SpA. The Company and the Company’s other subsidiaries are not subject to these initiated proceedings.

In the Case filed by Telecomunicaciones Vergara Alvarez E.I.R.L. against Altiplano Minerals Chile SpA, both parties, at the request of the plaintiff, mutually agreed to suspend and postpone the hearing to September 30, 2026. During this hearing the judge will announce its final ruling unless a further postponement or settlement is reached.

The Company confirms that is working with the plaintiff and authorities to resolve the remaining proceeding against Altiplano Minerals SpA to prevent any further actions. The Company will provide an update once more information is available.

In the case of Andes Core Mining v. Andes Metals, the court rejected Andes Metals SpA’s defense and ordered the liquidation of Andes Metals Chile SpA. The claim made by Andes Core Mining involved CLP 191,788,796 (C$282,000). Andes Metals assets consist of the underground Santa Beatriz mine under option and the camp infrastructure and the exploration property Regalo. Santa Beatriz has been on care and maintenance since March 2026, and no exploration activity was conducted on Regalo. The file now goes to the Insolvency Superintendency to appoint an administrator who will carry out the liquidation process. Any surplus left over from the sale will be retained by the company. The Company continues to consider its legal position, including pursuing further actions to recover debts owed and other legal remedies to protect its interests.

ON BEHALF OF THE BOARD

/s/ “Alastair McIntyre”
President, CEO and Director

For further information, please contact:

Alastair McIntyre, CEO
moc.slatemnpa@mriatsala
Tel: (416) 434 3799

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 Information:
This news release contains forward-looking information within the meaning of applicable Canadian securities laws, including statements regarding proceedings in respect of certain of the Company's subsidiaries in Chile and, the timing and potential outcome of these court proceedings and related matters. Forward-looking information is based on assumptions and is subject to known and unknown risks and uncertainties that could cause actual results to differ materially from those expressed or implied. Readers are cautioned not to place undue reliance on forward-looking information. The Company undertakes no obligation to update or revise such information except as required by applicable securities laws.