Slide 1: A New Vision for an Historic High-Grade Gold Mine in Québec's Abitibi
The O'Brien Gold Project A New Vision for an Historic High-Grade Gold Mine in Québec's Abitibi April 2026 TSXV:RDS OTCQX:RMRDF
Slide 2: Cautionary Statement Regarding Forward-Looking Information
TSXV : RD S OTCQX : RMRDF 2 Cautionary Statement Regarding Forward-Looking Information This presentation contains "forward-looking information" within the meaning of the applicable Canadian securities other risks of the mining industry; delays in obtaining governmental approvals or financing; risks
Slide 3: Cautionary Statement Regarding Forward-Looking Information
TSXV : RD S OTCQX : RMRDF 3 Cautionary Statement Regarding Forward-Looking Information Qualified Persons All-in Sustaining Cost (AISC) and AISC per Ounce Disclosure of a scientific or technical nature in this presentation was prepared under the supervision of Mr. Richard AISC is reflective of all of
Slide 4: Exploring and Growing the Historic O'Brien Gold Project in Québec's Abitibi
TSXV : RD S OTCQX : RMRDF 4 W HY RA D IS S ON A H I GH - GR A D E RE S OU R CE ( E F F E CT I V E J A N 2 0 2 6 ) 1 Ongoing resource growth: Updated 2026 MRE Published March 2, 2026 Exploring and Growing the +8% Increase +82% Increase Historic O’Brien Gold 0.63 Moz Ind. 1.69 Moz Inf. Project in Québ
Slide 5: Management and Board
TSXV : RD S OTCQX : RMRDF 5 Board Pierre Beaudoin Peter MacPhail | Director Chairperson ▪ 35+ years of m ining experie nce . Formerly COO (2015- 2022) of Alamos Gold, Aurico and Northgate Mine rals. ▪ 30+ years of mining experience. ▪ Le d development of Young Davidson mine, La Yaqui ▪ Formerly COO
Slide 6: A History of Hub-and-Spoke Mining Complexes
TSXV : RD S OTCQX : RMRDF 6 Q U É BE C ’ S AB IT IB I A History of Hub-and- N Spoke Mining Complexes Mines and Mining Services in Québec’s Abitibi (+100 Moz Au endowment) O’Brien Project Positioned within the 25 Moz Cadillac- Doyon- Bousquet Camp on the Cadillac-Larder Westwood LaRonde ROUYN- Lake B
Slide 7: O'Brien Gold Project
TSXV : RD S OTCQX : RMRDF 7 LaRonde Westwood- Doyon O’Brien Gold Project
Slide 8: Exploration and Growth
Exploration and Growth
Slide 9: Adjacent Ore Deposits in the Cadillac-Bousquet District
TSXV : RD S OTCQX : RMRDF 9 Adjacent Ore Deposits in the Cadillac-Bousquet District O’Brien Project 2026 O’Brien MRE 140,000 m step-out drill program ongoing to 2km depth
Slide 10: Deep Exploration and Growth: Proof of Concept Drilling
TSXV : RD S OTCQX : RMRDF 10 Deep Exploration and Growth: Proof of Concept Drilling A 140,000m step-out drill program with up to 8 drill rigs is ongoing to test the full potential of the Project 2025 MRE With Deep Step-Out As of December 31, 2025: 25% complete Drill Results to Date Result: deep dril
Slide 11: 2026 MRE Update, 2.2 g/t Au Cutoff
TSXV : RD S OTCQX : RMRDF 11 2026 MRE Update, 2.2 g/t Au Cutoff (US$2,500, 1.2m minimum width, 90% Recovery) Focus of Indicated Resource Inferred Resource Exploration to 0.63 Million Oz 1.69 Million Oz 2km depth (3.49 Mtonnes at 5.59 g/t) (10.37 Mtonnes at 5.08 g/t) Mineralization Open in Every Dire
Slide 12: April 30, 2026: Deepest Intercept to Date at 1.9 Km
TSXV : RD S OTCQX : RMRDF 12 April 30, 2026: Deepest Intercept to Date at 1.9 Km
Slide 13: Drill Results Reported Over the Last 12 Months
TSXV : RD S OTCQX : RMRDF 13 W HY RA D IS S ON Drill Results Reported Over the Last 12 Months 12 Month Drilling “Hit” Success Rate News Release Holes Reported1 (Contains >3g/t Vein “Hit” % Best Intercept2 Intercept)2 30th Apr 26 7 7 100% OB26-384 4.54 g/t Au over 12.0m 30th April 263 9 2 22%3 OB26-3
Slide 14: Eight-Vein Model Developing Beneath Historic Mine with Continuity to Former Workings
TSXV : RD S OTCQX : RMRDF 14 Eight-Vein Model Developing Beneath Historic Mine with Continuity to Former Workings
Slide 15: 2026 MRE Sensitivity by Cut-Off
TSXV : RD S OTCQX : RMRDF 15 2 0 2 6 M R E U p d at e 8 g/t Au 4.5 g/t Au (Historic O’Brien Mine, US$700/oz) (March 2023 MRE, US$1,250/oz) 2026 MRE Indicated Indicated Sensitivity 0.24 Moz 0.43 Moz (0.6 Mt at (1.6 Mt at by Cut-Off 12.7 g/t Au) 8.4 g/t Au) The updated MRE for the O’Brien Gold Project
Slide 16: MRE 2026 Mineral Resources and Growth
TSXV : RD S OTCQX : RMRDF 16 MRE 20261 (US$2,500, 2.2 g/t Au Cut-Off, 1.2m Minimum Width, 90% Recovery) Indicated Mineral Resources (koz) Tonnes (kt) Grade (g/t Au) Oz (koz Au) 501 582 628 Indicated Mineral 3,493 5.59 628 289 Resources Inferred Mineral 10,368 5.08 1,692 Williamson SLR March 2023 SLR
Slide 17: Mine Development
Mine Development
Slide 18: O'Brien 2025 PEA: Basis of Study
TSXV : RD S OTCQX : RMRDF 18 Westwood- O’Brien 2025 PEA: Basis of Study Doyon Complex Assumes off-site milling based on the results of a milling assessment and metallurgical study with the nearby Doyon gold mill, part of IAMGOLD LaRonde Corporation’s Westwood Mine Complex 1 Complex “Snap-shot” study
Slide 19: Gold Price Assumptions and Sensitivities
TSXV : RD S OTCQX : RMRDF 19 W HY RA D IS S ON Project Assumptions Gold Price Assumptions Assumption At US$4,000 Au and Sensitivities 2026 MRE1 US$2500/oz More Ounces, More Tonnes, Lower Grade 2025 PEA MRE/DSO 2 US$2000/oz More Tonnes, Larger Stopes, Better Continuity (Stope Design) NPV5% from C$532
Slide 20: Corporate
Corporate
Slide 21: Next Steps
TSXV : RD S OTCQX : RMRDF 21 Next Steps Pursuing Exploration Growth Pursuing Development Path Significant Success with Ongoing The “snap-shot” PEA offers a Credible Exploration Development Path for O’Brien Fully Funded 140,000m drill Environmental Baseline Data leading program with up to 8 rigs thro
Slide 22: Capitalization and Balance Sheet
TSXV : RD S OTCQX : RMRDF 22 Capitalization and Balance Sheet Shareholder Distribution Tickers TSXV:RDS | OTCQX:RMRDF 7% Management & Share Price 1 C$1.02 40% Insiders Public Float 1 Market Cap C$434 Million 26% 2 Institutional Common Shares 433 Million Shareholders 2 Options 17 Million 27% 2 High N
Slide 23: Contact Information
Contact Information Matt Manson President, CEO & Director mmanson@radissonmining.com Hubert Parent-Bouchard Chief Financial Officer hpbouchard@radissonmining.com Radisson Mining Resources Inc. 50 rue du Petit-Canada Kristina Pillon Rouyn-Noranda, Qc J0Y 1C0 Manager, Investor Relations Investor Inqui
Slide 24: Appendix
Appendix
Slide 25: O'Brien Gold Project
TSXV : RD S OTCQX : RMRDF 25 O’Brien Gold Project 25
Slide 26: Well Understood Geology
TSXV : RD S OTCQX : RMRDF 26 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 13
Slide 27: Significant Mineralization Extension Beneath Historic Mine
TSXV : RD S OTCQX : RMRDF 27 Significant Mineralization Extension Beneath Historic Mine January 27, 2026: fifteen wedges from pilot drill hole OB-337-24 beneath the historic O’Brien Mine All holes intersected multiple veins with high-grade New 250mx700m zone of mineralization shows clear continuity
Slide 28: O'Brien Mineralogy
TSXV : RD S OTCQX : RMRDF 28 O’Brien Mineralogy Quartz-sulphide veins with coarse VG within Piché Formation adjacent to the Cadillac-Larder Lake Break High strain, with biotite alteration and pyrite/arsenopyrite association Pattern of very high-grade, narrow intercepts within broader altered and min
Slide 29: December 9, 2024: 1.35 kg/t Au at Re-Discovered Jewelry Box
TSXV : RD S OTCQX : RMRDF 29 December 9, 2024: 1.35 kg/t Au at Re-Discovered Jewelry 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 Mined between 2
Slide 30: July 28, 2025: Gold Mineralization in Trenching Program
TSXV : RD S OTCQX : RMRDF 30 July 28, 2025: Gold Mineralization in Trenching Program Z-Fold Quartz Vein First Trench of 2025 summer program 30m east of O’Brien coreshack and office Semi- Mass ive Py- Visible gold in classic setting: 3m wide zone of high strain, Po Band biotite alteration, sulphides
Slide 31: O'Brien 2025 PEA: Underground Mine Design
TSXV : RD S OTCQX : RMRDF 31 O’Brien 2025 PEA: Underground Mine Design Long hole stoping with cemented rock backfill. 2.2m minimum and 2.7m average stope widths Stope Optimization at US$2,000/oz Au 11 year Life. Years 2–8: 1,160 tpd prod. stopes PEA contemplates 2,000 tpd of mill capacity Hence, all
Slide 32: O'Brien 2025 PEA: Underground Mine Design (2)
TSXV : RD S OTCQX : RMRDF 32 O’Brien 2025 PEA: Underground Mine Design (2) Twin portals and 4.5mx4.5m ramp access 20 tonne trucks and vertical conveyor from 300m level to surface 86km of development and 25m levels Does not utilize historic O’Brien Mine. Utilizes Kewagama Mine infrastructure for vent
Slide 33: O'Brien 2025 PEA: Underground Mine Design (3)
TSXV : RD S OTCQX : RMRDF 33 O’Brien 2025 PEA: Underground Mine Design (3) 56% of mined ounces in the PEA mine plan are from Indicated Mineral Resources and 44% from Inferred Mineral Resources Indicated/Inferred Mineral Resource blocks are equally distributed through the 11-year life Future infill d
Slide 34: O'Brien 2025 PEA: Surface Facilities
TSXV : RD S OTCQX : RMRDF 34 O’Brien 2025 PEA: Surface Facilities No mill, tailings facility, or major surface earthworks No requirement for major access or power Water Treatment infrastructure No camp, surface maintenance (small vehicle Historic Mine Waste Rock maintenance at existing O’Brien facil
Slide 35: O'Brien 2025 PEA: Schedule, Permitting, EA
TSXV : RD S OTCQX : RMRDF 35 O’Brien 2025 PEA: Schedule, Permitting, EA O’Brien is subject to the Québec Environmental Quality Act and is expected to be subject to a Québec Environmental Impact Assessment and Review. The Project is not expected to be subject to a Federal Impact Assessment procedure
Slide 36: O'Brien 2025 PEA: Costs
TSXV : RD S OTCQX : RMRDF 36 O’Brien 2025 PEA: Costs LOM Capital Costs (C$M) note 1,2 LOM Operating Costs and AISCnote 1,2 Mining Capex $93 $346 C$M Mining, Haulage and Water Management Mobile Equipment $25.7 $75.66 C$/tonne milled Mine Development $47.4 $173 C$M Buildings $0.4 Processing & Tailings
Slide 37: O'Brien 2025 PEA: Sensitivities
TSXV : RD S OTCQX : RMRDF 37 O’Brien 2025 PEA: Sensitivities Valuation Sensitivities to Gold Price (C$M)note1,2 1. See "Non-IFRS Measures". Gold Price (US$/oz) $1,800 $2,200 $2,550 $3,000 $3,300 $4000 2. Payback is defined as achieving cumulative Price Case Downside Consensus Upside “Spot” positive
Slide 38: Neighbouring Mills to the O'Brien Project: Quebec
TSXV : RD S OTCQX : RMRDF 38 Neighbouring Mills to the O’Brien Project: Quebec Operating Process Facilities Sleeping Giant Mill 1. LaRonde Complex Exploration Projects Owner Abcourt Mines includes two mines Mine Feed Elder Mine (LaRonde Mine, LZ5 Mine) Throughput 350 tpd(3) which feed into two LaRon
Slide 39: Neighbouring Mills to the O'Brien Project: Ontario
TSXV : RD S OTCQX : RMRDF 39 Neighbouring Mills to the O’Brien Project: Ontario Operating Process Facilities Bell Creek Mill Normetal, Globex Mining Exploration Projects Owner Pan American Silver Mine Feed Bell Creek, Timmins West Throughput 4,400 tpd Capacity 5,359 tpd Dome Mill North Timmins, Gowe