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Altamira Gold Announces Filing of NI 43-101 Technical Report for Maria Bonita Porphyry Gold Project, Cajueiro District, Brazil

Resource Estimates Technical Reports (NI 43-101)

Altamira Gold Announces Filing of NI 43-101

Technical Report for Maria Bonita Porphyry

Gold Project, Cajueiro District, Brazil

Vancouver, British Columbia--(Newsfile Corp. - June 19, 2025) -

Altamira Gold Corp. (TSXV: ALTA)

(FSE: T6UP) (OTC Pink: EQTRF),

("

Altamira

" or the "

Company

") is pleased to announce that it has

filed a National Instrument 43-101 technical report (the "

Report"

) on the maiden resource estimate for

the Maria Bonita porphyry gold deposit within the Cajueiro Project. The report can be found under the

Company's profile on SEDAR+ at

www.sedarplus.ca

and on the Company's website. The maiden

resource was originally published in a press release on May 5, 2025, which is also available for review

on SEDAR+ and on the Company's website. There are no material differences between the resource

announced in the news release and the resource in the report.

Qualified Person

Volodymyr Myadzel, PhD, MAIG, a consultant to the Company as well as a Qualified Person as defined

by National Instrument 43-101, supervised the preparation of the technical information in the report.

About Altamira Gold Corp.

The Company is focused on the exploration and development of gold and copper projects within western

central Brazil, strategically advancing five projects spanning over 100,000 hectares within the prolific

Juruena Gold Belt—an area that has historically yielded over 6 million ounces of placer gold*. Leading

the portfolio is the Cajueiro project, a highly prospective asset with an NI 43-101** compliant resource

estimate within the Central Area of 185,000 ounces of gold in the Indicated category (5.66Mt @ 1.02 g/t)

and an additional 515,000 ounces in the Inferred category (12.66Mt @ 1.26 g/t) and also some 7

kilometers to the west, within the Maria Bonita area, an NI 43-101 compliant resource estimate of

357,800 ounces of gold in the Indicated category (24.19 Mt @ 0.46g/t gold) and an additional 362,400

ounces gold in the Inferred category (25.64 Mt @ 0.44g/t gold).

Ongoing exploration and fieldwork at Cajueiro indicate the presence of multiple porphyry gold systems,

reinforcing its potential for district-scale development. These hard-rock gold sources align with historical

alluvial gold production, highlighting the region's exceptional gold endowment and scalability. With a rich

geological setting and a track record of significant discoveries, the Company is well-positioned to unlock

further value across its expansive land package.

* Juliani, C. et al; Gold in Paleoproterozoic (2.1 to 1.77 Ga) Continental Magmatic Arcs at the Tapajós and Juruena Mineral Provinces (Amazonian

Craton,Brazil): A New Frontier for the Exploration of Epithermal-Porphyry and Related Deposits. Minerals 2021, 11, 714.

**NI 43-101 Technical Report, Cajueiro Project, Mineral Resource Estimate: Global Resource Engineering, Denver Colorado USA, 10

th

October

2019; Authors K. Gunesch, PE; H. Samari, QP-MMSA; T. Harvey, QP-MMSA

On Behalf of the Board of Directors,

ALTAMIRA GOLD CORP.

"Michael Bennett"

Michael Bennett

President & CEO

Tel: 604.676.5661

[email protected]

www.altamiragold.com

Neither TSX Venture Exchange nor its Regulation Services Provider (as that term is defined in

policies of the TSX Venture Exchange) accepts responsibility for the adequacy or accuracy of this

release.

The securities described herein have not been registered under the U.S. Securities Act or any state

securities laws, and may not be offered or sold in the United States absent registration or an

applicable exemption from registration requirements under the U.S. Securities Act and any applicable

state securities laws.

Forward-looking Statements

Certain information contained herein constitutes "forward-looking information" under Canadian

securities legislation.

Forward-looking information includes, but is not limited to, statements with

respect to the extension of the Warrants.

Generally, forward-looking information can be identified by

the use of forward-looking terminology such as "will", "intends" or variations of such words and

phrases or statements that certain actions, events or results "will" occur.

Forward-looking statements

are based on the opinions and estimates of management as of the date such statements are made

and they are subject to known and unknown risks, uncertainties and other factors that may cause the

actual results to be materially different from those expressed or implied by such forward-looking

statements or forward-looking information, including the receipt of all necessary regulatory approvals.

Although management of the Company has attempted to identify important factors that could cause

actual results to differ materially from those contained in forward-looking statements or forward-looking

information, there may be other factors that cause results not to be as anticipated, estimated or

intended.

There can be no assurance that such statements will prove to be accurate, as actual results

and future events could differ materially from those anticipated in such statements.

Accordingly,

readers should not place undue reliance on forward-looking statements and forward-looking

information.

The Company will not update any forward-looking statements or forward-looking

information that is incorporated by reference herein, except as required by applicable securities laws.

To view the source version of this press release, please visit

https://www.newsfilecorp.com/release/256139