Radisson closes C$57 million strategic investment

Rouyn-Noranda, Quebec--(Newsfile Corp. - September 1, 2026) - Radisson Mining Resources Inc. (TSXV: RDS) (OTCQX: RMRDF) (" Radisson " or the " Company ") is pleased to announce that it has closed its previously announced private placement of units with Agnico Eagle Mines Limited (" Agnico Eagle "). Under the terms of the private placement, Agnico Eagle purchased 53,420,000 units of the Company at a price of C$1.07 per unit for aggregate gross proceeds of C$57,159,400, each unit consisting of one Class A common share and one-half of one common share purchase warrant exercisable at C$1.39 per share for a period of 60 months. As of closing, Agnico Eagle has an ownership position of approximately 10.45% of the issued and outstanding common shares of the Company on a non-diluted basis and approximately 14.90% on a partially-diluted basis.

The proceeds of the private placement will fund the commencement of an advanced underground exploration program at Radisson's 100%-owned O'Brien Gold Project in the Abitibi region of Québec, including the development of an access ramp and related underground and surface mine infrastructure. The Company's ongoing 140,000-metre step-out drill program continues as planned, funded from existing cash resources.

The investor rights agreement between the Company and Agnico Eagle described in the Company's news release dated August 24, 2026 was executed concurrently with the closing of the private placement.

The private placement was completed on a non-brokered basis and no commissions or finder's fees were paid in connection with it. The securities issued under the private placement are subject to a hold period expiring on January 2, 2027. The private placement remains subject to the final acceptance of the TSX Venture Exchange.

About Radisson Mining

Radisson is a gold exploration company focused on its 100% owned O'Brien Gold Project, located in the Bousquet-Cadillac mining camp along the world-renowned Larder-Lake-Cadillac Break in Abitibi, Québec. A July 2025 PEA 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 0.63 Moz (3.49 Mt at 5.59 g/t Au), with additional Inferred Mineral Resources estimated at 1.69 Moz (10.37 Mt at 5.08 g/t Au). Please see the NI 43-101 "O'Brien Gold Project Technical Report and Preliminary Economic Assessment, Québec, Canada" effective June 27, 2025, Radisson's news release dated March 2, 2026 "With Step-Out Drilling Continuing, Radisson Demonstrates Meaningful Resource Growth at O'Brien with an Updated Mineral Resource Estimate" and other filings made with Canadian securities regulatory authorities available at www.sedarplus.ca for further details and assumptions relating to the O'Brien Gold Project. For more information on Radisson, visit our website at www.radissonmining.com or contact:

Matt Manson President and CEO 416.618.5885 mmanson@radissonmining.com

Kristina Pillon Manager, Investor Relations 604.908.1695 kpillon@radissonmining.com