Slide 1: Growing & Advancing The O'Brien Gold Project
Growing & Advancing The O’Brien Gold Project: One of Quebec’s Most Historic and High-Grade Gold Projects June 2025 TSXV:RDS OTCQB:RMRDF 1 TSXV:RDS
Slide 2: Cautionary Statement Regarding Forward-Looking Information
Cautionary Statement Regarding Forward-Looking Information Certain information contained in this presentation constitutes forward-looking information within the meaning of Canadian securities laws ("forward-looking statements"). All statements in this presentation, other than statements of historica
Slide 3: Radisson and the O'Brien Gold Project
Radisson and the O’Brien Gold Project • Exploring the Historic O’Brien Mine in Quebec’s Abitibi • c.1Moz of High-Grade Mineral Resources and Growing • 22,000-metre 2025 drill program, expanded in May 2025 by an additional 30-40,000 metres. Fully-Funded from C$16M1 treasury • Development Path with Po
Slide 4: News Release December 9, 2024: 1,345 g/t Au over 1m
News Release December 9, 2024: 1,345 g/t Au over 1m (within 643.1 g/t over 2m) Re-Discovery of Famous O’Brien “Jewellery Box” 4 TSXV:RDS
Slide 5: Leadership
Leadership Board Pierre Beaudoin Chairperson Peter MacPhail Director 30+ years of mining experience. Formerly COO (2018-2024) of 35+ years of mining experience. Formerly COO (2015-2022) of SilverCrest Metals Inc. for Las Chipas Project. Formerly COO Alamos Gold, Aurico and Northgate Minerals. Led de
Slide 6: Located in the World's Most Prolific Gold Belt
Located in the World’s Most Prolific Gold Belt • Located in the Abitibi greenstone belt hosting +100 million gold ounces N between Ontario and Quebec in eastern Canada. One of the largest and most prolific Neoarchean greenstone belts in the world • O’Brien is located in the 25 Moz Cadillac-Bousquet
Slide 7: O'Brien: 21 km from Doyon-Westwood & 7 km from LaRonde
O’Brien: 21 km from Doyon-Westwood & 7 km from LaRonde Doyon-Westwood Mine and Mill The Benefits of Location in a Mature Mining Camp LaRonde Mine and Mill Trans-Canada Highway 117 Highway 117 Hydro-Electric Power Proximity to numerous under-capacity mills Old O'Brien Mill Access to high quality serv
Slide 8: Good Neighbours
Good Neighbours LaRonde Westwood-Doyon O’Brien 8 TSXV:RDS
Slide 9: Good Neighbours
Good Neighbours Westwood-Doyon LaRonde MRE 2023, 4.5 g/t Au Cutoff1 (US$1600, 1.2m minimum width, 85% Recovery) Indicated Resource Inferred Resource 501,000 oz 446,000 oz (1.52 Mtonnes at 10.26 (1.60 Mtonnes at 8.66 O’Brien g/t) g/t) 3.0 g/t Au Cutoff 576,000 oz 683,000 oz (2.12 Mtonnes at 8.46 (3.6
Slide 10: O'Brien Open in All Directions
O’Brien Open in All Directions 5.2 Km W WEST O’BRIEN O’BRIEN EAST O’BRIEN E Thompson Cadillac Kewagama Surface 75% of existing Mineral - 250 m Resource 700 m -600m 1750 m - 500 m Trend - 750 m 100% Open Trend 5 -900m 4 Trend 3 - 1000 m Trend MRE 2023, 4.5 g/t Au Cutoff O’Brien Central Trend Trend 1
Slide 11: Recent Deep Drill Results: Drill Holes Published to Date
Recent Deep Drill Results: Drill Holes Published to Date • OB-24-324 is 170 metres below current Mineral Resources at “Trend #1” • On September 24, 2024: OB-24-324 hit 27.61 g/t Au over 6.0 metres, including 102.0 g/t Au over 1.0 metres at 1,100 metres depth • OB-24-337 is the deepest ever hole dril
Slide 12: May 21, 2025: Coarse Visible Gold in Published and Pending Drill Holes
May 21, 2025: Coarse Visible Gold in Published and Pending Drill Holes • As of May 2025, 27 pilot holes and wedges had been completed beneath the historic O’Brien mine and the new Mineral Resources at East O’Brien of which 14 have been published. • Results from 13 holes are pending. • Coarse visible
Slide 13: Deep Drilling and Continuity
Deep Drilling and Continuity S N • The recent deep drilling is Section: also demonstrating Trend #1 continuity of grade and mineralization to depth • This was predicted by the steeply plunging ore-shoots of the historic O’Brien mine • Continuity is being demonstrated over large distances: the latest
Slide 14: Modelling Multiple New Veins to Base of Historic Mine
Modelling Multiple New Veins to Base of Historic Mine • April 2, 2025: three new wedges completed and published from OB-337-24 • All four holes intersect mineralization and resolve up to four new veins • Main central vein connects to principal mining stope at the historic mine and is resolved by all
Slide 15: December 9, 2024: 1.35 kg/t Au at Re-Discovered Jewellery Box
December 9, 2024: 1.35 kg/t Au at Re-Discovered Jewellery Box • OB-24-347: 1,345 g/t Au over 1 metre (within 643.1 g/t over 2 metres) • Re-Discovery of Famous O’Brien “Jewelry Box” • Believed to have been the source of O’Brien’s famous museum quality VG specimens Jewelry Box Stope • Mined between 25
Slide 16: Gold Mineralization at O'Brien
Gold Mineralization at O’Brien • Quartz-sulphide veins with coarse VG • Pattern of very high-grade, narrow intercepts within broader altered and mineralized envelopes • OB-24-320 with 24.74 g/t Au over 6.0 metres, including. 137.0 g/t Au over 1.0 metre (Aug. 14, 2024) • OB-24-324 with 27.60 g/t Au o
Slide 17: February 3, 2025: Metallurgical Study and Doyon Milling Assessment
February 3, 2025: Metallurgical Study and Doyon Milling Assessment • Sept. 9, 2024: MOU with IAMGOLD to facilitate technical assessment of Doyon Mill, IAMGOLD Inc. viability of processing O’Brien mined material at Doyon mill • Doyon is part of the Doyon-Westwood mining complex with capacity of c.3,0
Slide 18: Upcoming Milestones
Upcoming Milestones Regular Drilling News-Flow • Moving to 4 drill rigs onsite • 22,000 metres in 2025 Program expanded by additional 30-40,000 metres • Fully-funded • Targeting deep drilling below high-grade trends and Jewellery Box to surface Thinking Ahead to Development • PEA for an O’Brien Mine
Slide 19: Capitalization and Balance Sheet
Capitalization and Balance Sheet $134 Million $16 Million 382 Million Market Capitalization Cash Position Shares Outstanding As of June 2, 2025 Unaudited Estimate as of May 31, 2025 Estimated as of May 15, 2025 Management & Insiders, 9% Public Float, 37% Institutional Investors, 20% High Net Worth R
Slide 20: Contact Information
Contact Information Matt Manson Hubert Parent-Bouchard Kristina Pillon President, CEO & Director Chief Financial Officer Manager, Investor Relations mmanson@radissonmining.com hpbouchard@radissonmining.com kpillon@radissonmining.com Radisson Mining Resources Inc. 50 rue du Petit-Canada Rouyn-Noranda
Slide 21: 2023 O'Brien Mineral Resource Estimate
2023 O’Brien Mineral Resource Estimate Indicated Mineral Resources Inferred Mineral Resources Cut-off Grade O'Brien Deposit Tonnage Grade Metal Tonnage Grade Metal Resource date (t) (g/t Au) (oz Au) (t) (g/t Au) (oz Au) July 2019 1,115,000 8.85 318,000 777,000 6.73 168,000 March 2023 1,517,000 10.26
Slide 22: 2023 MRE Sensitivity on Cut-Off
2023 MRE Sensitivity on Cut-Off Indicated Mineral Resources Inferred Mineral Resources Cut-off Grade Tonnage Grade Metal Tonnage Grade Metal (t) (g/t Au) (oz Au) (t) (g/t Au) (oz Au) 6.0 g/t Au 1,012,000 12.80 417,000 945,000 11.12 338,000 5.0 g/t Au 1,313,000 11.12 470,000 1,334,000 9.46 406,000 4.
Slide 23: Well Understood Geology
Well Understood Geology • Good understanding of vein morphology and continuity from mapping of historic O’Brien workings • At large-scale the veins are continuous, sub-parallel to the stratigraphy and are developed within multiple units of the Piche Group. • Vein Model with 134 Mineralized Zones has
Slide 24: Cadillac-Bousquet 25 Moz Gold Mining District
Cadillac-Bousquet 25 Moz Gold Mining District 24 TSXV:RDS