Mr. Matt Manson reports

RADISSON ANNOUNCES INCREASE IN AGGREGATE SIZE OF BOUGHT DEAL FINANCING TO $25 MILLION

Radisson Mining Resources Inc., in connection with its previously announced bought deal private placement, and Cormark Securities Inc. on behalf of a syndicate of underwriters, have agreed to increase the size of the private placement to aggregate gross proceeds of approximately $25-million.

The offering will consist of the issuance and sale of 41,667,000 Class A common shares of the company at a price of 60 cents per share, for gross proceeds of $25,000,200.

In connection with the increase in aggregate size of the offering, the underwriters have agreed to forego their option to further increase the size of the offering, which was originally granted to them by the company.

The company will use the net proceeds from the offered shares for continuing exploration and advancement of the O'Brien gold project, and for general corporate purposes.

The offering is expected to close on or about Oct. 7, 2025, or such other date as the company and the underwriters may agree, and is subject to certain conditions, including, but not limited to, the receipt of all necessary regulatory and other approvals, including the conditional approval of the TSX Venture Exchange.

Subject to compliance with applicable regulatory requirements and in accordance with National Instrument 45-106, Prospectus Exemptions, the offered shares will be offered for sale to purchasers resident in all provinces of Canada pursuant to the listed issuer financing exemption under Part 5A of NI 45-106, as amended by Coordinated Blanket Order 45-935, Exemptions from Certain Conditions of the Listed Issuer Financing Exemption. The underwriters will also be entitled to offer the offered shares for sale in the United States pursuant to available exemptions from the registration requirements of the United States Securities Act of 1933, as amended, and in those other jurisdictions outside of Canada and the United States provided it is understood that no prospectus filing or comparable obligation, continuing reporting requirement, or requisite regulatory or governmental approval arises in such other jurisdictions. The offered shares acquired under the offering by investors resident in Canada under the listed issuer financing exemption will not be subject to a hold period pursuant to applicable Canadian securities laws.

There is an offering document related to the offering and the use by the company of the listed issuer financing exemption that can be accessed under the company's profile on SEDAR+ and on the company's website. Prospective investors should read this offering document before making an investment decision.

Qualified persons

Disclosure of a scientific or technical nature in this news release was prepared under the supervision of Richard Nieminen, PGeo (Quebec), a geological consultant for the company and a qualified person for purposes of National Instrument 43-101, Standards of Disclosure for Mineral Projects. Mr. Nieminen is independent of the company and the O'Brien gold project.

About Radisson Mining Resources Inc.

Radisson is a gold exploration company focused on its 100-per-cent-owned O'Brien gold project, located in the Bousquet-Cadillac mining camp along the world-renowned Larder-Lake-Cadillac break in Abitibi in Quebec. A July, 2025, preliminary economic assessment described a low-cost and high-value project with an 11-year mine life and significant upside potential based on the use of existing regional infrastructure. Indicated mineral resources are estimated at 580,000 ounces (2.20 million tonnes at 8.2 grams per tonne (g/t) gold (Au)), with additional inferred mineral resources estimated at 930,000 ounces (6.67 million tonnes at 4.4 g/t Au). Please see the NI 43-101 report, titled "O'Brien Gold Project Technical Report and Preliminary Economic Assessment, Quebec, Canada," effective June 27, 2025, and other filings made with Canadian securities regulatory authorities available on SEDAR+, for further details and assumptions relating to the O'Brien gold project.

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