EDMONTON, AB, September 4, 2025 – Altiplano Metals Inc. (TSXV: APN) (WKN: A2JNFG) (“Altiplano” or the “Company”) further to the Company’s news releases dated July 24, 2025, August 8, 2025, and August 21, 2025, the Company continues to work towards the filing of its annual audited financial statements and MD&A for the fiscal year ended March 31, 2025 (the “Required Filings”). The engagement is currently in the quality control review stage, with completion expected during the week of September 5, 2025. The timeline has been delayed due to the processing of audit findings and review procedures conducted over the past two weeks.  As a result of these delays, the Company obtained approval from the Alberta Securities Commission to extend the Management Cease Trade Order (“MCTO”) under National Policy 12-203 Management Cease Trade Orders (“NP 12-203”) to September 15, 2025. The Required Filings are anticipated to be completed on or before September 12, 2025, with the interim financial statements and management’s discussion and analysis for the period ended June 30, 2025, expected to be filed on or before September 15, 2025.

The Required Filings were due to be filed by July 29, 2025.  In connection with the anticipated delays in making the Required Filings, the Company made an application for a Management Cease Trade Order (“MCTO”) under NP 12-203 to the Alberta Securities Commission, as principal regulator for the Company, and the MCTO was issued on July 30, 2025.  The MCTO restricts all trading by the Company’s CEO and CFO in securities of the Company, whether direct or indirect.  The issuance of the MCTO does not affect the ability of persons who are not directors, officers or insiders of the Company to trade their securities.  The MCTO will remain in effect until the Required Filings are filed or until it is revoked or varied.

Both the Company and its auditors are working diligently towards the completion and filing of the Required Filings, and the Company will provide additional updates.

The Company confirms that it intends to satisfy the provisions of the alternative information guidelines described in NP 12-203 by issuing bi-weekly default status reports in the form of a news release until it meets the Required Filings requirement.  The Company has not taken any steps towards any insolvency proceeding and the Company has no material information relating to its affairs that has not been generally disclosed.

About Altiplano

Altiplano Metals is a growing gold, silver, and copper company focused on the Americas. The Company has a diversified portfolio of assets that include exploration properties, a developing copper/gold/iron mine and a state-of-the-art operating copper/gold and iron processing facility. Altiplano is focused on creating long-term stakeholder value through developing safe and sustainable production, reinvesting into exploration and development, and pursuing acquisition opportunities to provide scalable upside opportunities. Management has a substantial record of success in capitalizing on opportunity, overcoming challenges and building shareholder value.

Altiplano is part of the Metals Group of Companies, managed by exploration professionals who stand for technical excellence, robust project selection and strong corporate governance, with a proven ability to identify and capitalize on investment opportunities and deliver shareholder returns.

ON BEHALF OF THE BOARD

/s/ “John Williamson”
Chairman

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.

This release includes certain statements that may be deemed “forward-looking statements”. All statements in this release, other than statements of historical facts, that address exploration drilling, exploitation activities and events or developments that the Company expects are forward-looking statements. Although the Company believes the expectations expressed in such forward-looking statements are based on reasonable assumptions, such statements are not guarantees of future performance and actual results or developments may differ materially from those in the forward-looking statements. Factors that could cause actual results to differ materially from those in forward-looking statements include market prices, exploitation and exploration successes, continuity of mineralization, uncertainties related to the ability to obtain necessary permits, licenses and title and delays due to third party opposition, changes in government policies regarding mining and natural resource exploration and exploitation, and continued availability of capital and financing, and general economic, market or business conditions. Investors are cautioned that any such statements are not guarantees of future performance and actual results or developments may differ materially from those projected in the forward-looking statements. For more information on the Company, investors should review the Company’s continuous disclosure filings that are available at www.sedarplus.ca .