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AME.V ·

Abacus Announces Appointment of Niina Makela as Chief Financial Officer

Management Changes

TSX Venture Exchange Symbol: AME

Suite 701 – 1500 West Georgia Street

Vancouver, B.C. V7Y 1C6 Canada

Tel: 604.682.0301

email: [email protected]

website: www.amemining.com

Abacus Announces Appointment of Niina Makela as Chief Financial Officer

Vancouver, BC – June 1 , 202 5. Abacus Mining & Exploration Corporation (“Abacus” or the

“Company”) (TSXV:AME) is pleased to announce the appointment of Niina Makela as Chief

Financial Officer (“CFO”) of the Company, effective June 1, 2025.

Ms. Makela is a Vancouver -based accountant with over 15 years of experience in the resource

sector, including serving as Senior Accountant to the Company since 2012. In the past, she has

served as CFO for Maritime Resources Corp. and as Controller/Senior Accountant to various

private and public mineral exploration companies.

“On behalf of Abacus and its Board of Directors, I am very pleased to continue working with Ms.

Makela in her new capacity of CFO.” stated Paul Anderson, President and CEO of Abacus.

The Company would also like to sincerely thank Jeannine Webb for her valuable contributions and

dedication to the Company over the past 11 years. Ms. Webb will continue with the Company as

an advisor to management and to the Board.

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 perm its 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.