Vancouver, BC – October 22, 2025. Abacus Mining & Exploration Corporation (“Abacus” or the “Company”) (TSXV:AME) advises its shareholders that the notice of meeting, management information circular and accompanying form of proxy (collectively the “Meeting Materials”) for the Company’s upcoming annual general and special meeting being held on November 27, 2025, are posted under the company's profile on SEDAR+ (www.sedarplus.ca) and on the Company's website.

Postal delivery may be delayed due to the rotating postal strike in Canada. There can be no assurance that the meeting materials will be received by the shareholder prior to the meeting. The Company is encouraging registered shareholders to access meeting materials electronically through the above-mentioned websites or may contact the Company to request electronic copies of the meeting materials.

Registered shareholders requesting a proxy or questions on voting may contact Computershare at 1-800-564-6253 (8:30 a.m. to 8:30 p.m. EST; Monday to Friday).

Beneficial shareholders, shareholders who hold their investment through a brokerage house, depository company or other intermediary, and have not received their information, should contact their broker representative.

On Behalf of the Board,
ABACUS MINING & EXPLORATION CORPORATION

Paul G. Anderson,
P.Geo. President, CEO and Director

About Abacus

Abacus is a mineral exploration and mine development company currently focused on copper and gold in B.C. and Nevada. The Company’s main asset is a 20% ownership interest, together with KGHM Polska Miedź S.A. (80%), in the proposed copper-gold Ajax Mine located southwest of Kamloops, B.C., which has undergone a joint provincial and federal environmental assessment process. On December 14, 2017, a decision was made by the B.C. Minister of Environment and Climate Change Strategy and the Minister of Energy, Mines and Petroleum Resources to decline to issue an environmental assessment certificate for the Project. KGHM have recently reopened an office in Kamloops, B.C. to facilitate First Nation, community and governmental engagement in order to advance the project towards a potential resubmission of the environmental application.

Abacus also owns a 100% interest in the Willow copper-gold property located near Yerington, Nevada, and it controls the contiguous Nev-Lorraine claims subject to a ten-year lease agreement.

For the latest reports and information on Abacus’ projects, please refer to the Company’s website at www.amemining.com.

Forward-Looking Information

This release includes certain statements that are deemed “forward-looking statements”. All statements in this release, other than statements of historical facts, that address events or developments that Abacus expects to occur, are forward-looking statements. Forward-looking statements are statements that are not historical facts and are generally, but not always, identified by the words “expects”, “plans”, “anticipates”, “believes”, “intends”, “estimates”, “projects”, “potential” and similar expressions, or that events or conditions “will”, “would”, “may”, “could” or “should” occur. 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 may differ materially from those in the forward-looking statements. Factors that could cause the actual results to differ materially from those in forward-looking statements include changes to commodity prices, mine and metallurgical recovery, operating and capital costs, foreign exchange rates, ability to obtain required permits on a timely basis, exploitation and exploration successes, 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. Forward-looking statements are based on the beliefs, estimates and opinions of the Company's management on the date the statements are made. Except as required by applicable securities laws, the Company undertakes no obligation to update these forward-looking statements in the event that management's beliefs, estimates or opinions, or other factors, should change.

Neither 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.

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