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APN.V ·

Altiplano Updates Status on Late Filing of Financial Statements

Financials Regulatory & Compliance

Altiplano Metals Inc.

250 Southridge NW, Suite 300

Edmonton, AB

Canada

T6H 4M9

Altiplano Updates Status on Late Filing of Financial Statements

EDMONTON AB, September 1, 2026 – Altiplano Metals Inc. (TSXV: APN) (WKN: A2JNFG) (“Altiplano” or

the “Company”) continues to work towards the filing of its annual financial statements for the year ended

March 31, 2026, management's discussion and analysis, and the related CEO and CFO certifications

(collectively, the "Required Filings").

The Company advises that approximately 94% of the items currently requested for audit review have been

provided to the auditor. The Company and its auditor continue to address follow -up questions and are

targeting completion of audit fieldwork by the end of next week. Manager review is planned for the week

of September 14, 2026, followed by partner and engagement quality control review during the week of

September 21, 2026.

Based on current progress, and assuming the remaining audit procedures are completed without

unforeseen delays, the Company believes it remains on track to file the Required Filings by September 28,

2026. The Company expects to file its interim first -quarter financial statements within one week

thereafter.

The Required Filings were due to be filed by July 29, 2026. In connection with the anticipated delays in

making the Required Filings, the Company made an application for a Management Cease Trade Order

(“MCTO”) under National Policy 12 -203 Management Cease Trade Orders (“NP 12-203”) to the Alberta

Securities Commission, as principal regulator for the Company, and the MCTO was issued on July 31, 2026.

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 will not affect the ability of persons who are not directors, officers

or insiders of the Company to tr ade their securities. MCTO will remain in effect until it is revoked or

varied.

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.

For additional information on the MCTO, please refer to the Company’s news releases dated July 21, 2026,

August 4, 2026, and August 18, 2026, available for viewing on the Company’s profile on SEDAR+.

ON BEHALF OF THE BOARD

Alastair McIntyre,

Director and CEO

E: [email protected]

T: (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 the Company's application for a management

cease trade order, the commencement and completion of the audit, the anticipated timing for filing the Required

Filings, and the filing of its interim first -quarter financial statements. Forward- looking information is based on

assumptions and is subject to known and unknown risks and uncertainties that could cause actual r esults to differ

materially from those expressed or implied, including the risk that the audit may not commence or be completed as

anticipated, the Required Filings may not be filed within the expected timeframe, the interim first -quarter financial

statements may be delayed, or the management cease trade order may not be granted. 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.