Slide 1: The O'Brien Gold Project
The O'Brien Gold Project A New Vision for an Historic High-Grade Gold Mine in Québec's Abitibi March 2026 TSXV:RDS OTCQX:RMRDF
Slide 2: Cautionary Statement Regarding Forward-Looking Information
TSXV : RDS 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 r
Slide 3: Cautionary Statement Regarding Forward-Looking Information
TSXV : RDS 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 : RDS OTCQX : RMRDF 4 WHY RADISSON A HIGH-GRADE RESOURCE (EFFECTIVE JAN 2026)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 Québec’s Abitibi (3.5 Mt at 5.59 g/t
Slide 5: Management
TSXV : RDS OTCQX : RMRDF 5 Pierre Beaudoin Peter MacPhail | Director Board Chairperson § 35+ years of mining experience. Formerly COO (2015- 2022) of Alamos Gold, Aurico and Northgate Minerals. § 30+ years of mining experience. § Formerly COO (2018-2024) of SilverCrest Metals Inc. for Las Chipas Pro
Slide 6: A History of Hub-and-Spoke Mining Complexes
TSXV : RDS OTCQX : RMRDF 6 QUÉBEC’S ABITIBI A History of Hub-and- Spoke Mining Complexes N 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 ROUYN- Westwood LaRonde Lake Break NORAN
Slide 7: Exploration and Growth
Exploration and Growth \
Slide 8: Adjacent Ore Deposits in the Cadillac-Bousquet District
TSXV : RDS OTCQX : RMRDF 8 Adjacent Ore Deposits in the Cadillac-Bousquet District O’Brien Project e nd ro La 2026 O’Brien MRE 140,000 m step-out drill program ongoing to 2km depth
Slide 9: 2026 MRE Update, 2.2 g/t Au Cutoff
TSXV : RDS OTCQX : RMRDF 9 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 Direct
Slide 10: Deep Exploration and Growth: Proof of Concept Drilling
TSXV : RDS 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 drill
Slide 11: 2026 MRE Sensitivity by Cut-Off
TSXV : RDS OTCQX : RMRDF 11 2026 MRE Update 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 (0.6 Mt at 0.43 Moz (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 uTlizes a
Slide 12: Significant Mineralization Extension Beneath Historic Mine
TSXV : RDS OTCQX : RMRDF 12 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 u
Slide 13: Eight-Vein Model Developing Beneath Historic Mine with Continuity to Former Workings
TSXV : RDS OTCQX : RMRDF 13 Eight-Vein Model Developing Beneath Historic Mine with Continuity to Former Workings
Slide 14: Continuity of Mineralization Below Mine West and Trend 1
TSXV : RDS OTCQX : RMRDF 14 Continuity of Mineralization Below Mine West (L) and Trend 1 (R)
Slide 15: 12 Month Drilling Success Rate
TSXV : RDS OTCQX : RMRDF 15 WHY RADISSON 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 27th Jan 26 7 7 100% OB24-322W4 23.4 g/t Au over 4.0m 6th Jan 26 6 5 83% OB25-337W13 30.6
Slide 16: Mine Development
Mine Development \
Slide 17: O'Brien Gold Project
TSXV : RDS OTCQX : RMRDF 17 LaRonde Westwood- Doyon O’Brien Gold Project
Slide 18: O'Brien 2025 PEA: Basis of Study
TSXV : RDS OTCQX : RMRDF 18 Westwood- O’Brien 2025 PEA: Basis of Study Doyon Complex Assumes off-site toll milling based on the results of a milling assessment and metallurgical study that demonstrated the potential LaRonde compatibility of the nearby Doyon gold mill, part Complex of IAMGOLD Corpora
Slide 19: O'Brien 2025 PEA: Results
TSXV : RDS OTCQX : RMRDF 19 Westwood- O’Brien 2025 PEA1: Results Doyon Complex Value (After Tax)2 US$2,550 Au US$4,000 Au NPV5% C$532M C$1.2B LaRonde IRR 48% 100% Complex Payback (years) 2.0 0.7 General Inputs Discount Rate 5% Gold Price US$2,550/oz FX Rate 0.73 CAD:USD Mine Plan2 Life of Mine 11.0
Slide 20: O'Brien 2025 PEA: Underground Mine Design
TSXV : RDS OTCQX : RMRDF 20 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 21: Corporate
Corporate \
Slide 22: Next Steps
TSXV : RDS OTCQX : RMRDF 22 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 to program with up to 8 rigs th
Slide 23: Gold Price Assumptions and Sensitivities
TSXV : RDS OTCQX : RMRDF 23 WHY RADISSON 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/DSO2 US$2000/oz More Tonnes, Larger Stopes, Better Continuity (Stope Design) NPV5% from C$532M to C$
Slide 24: Capitalization and Balance Sheet
TSXV : RDS OTCQX : RMRDF 24 Capitalization and Balance Sheet Shareholder Distribution Tickers TSXV:RDS | OTCQX:RMRDF 7% Management & Share Price 1 C$0.73 40% Insiders Public Float 1 Market Cap C$316 Million 26% 2 Institutional Common Shares 433 Million Shareholders 2 Options 17 Million 27% 2 Warrant
Slide 25: 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 26: Appendix
Appendix
Slide 27: O'Brien Gold Project
TSXV : RDS OTCQX : RMRDF 27 O’Brien Gold Project 27
Slide 28: Well Understood Geology
TSXV : RDS OTCQX : RMRDF 28 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
Slide 29: O'Brien Mineralogy
TSXV : RDS OTCQX : RMRDF 29 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 mine
Slide 30: December 9, 2024: 1.35 kg/t Au at Re-Discovered Jewelry Box
TSXV : RDS OTCQX : RMRDF 30 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 25
Slide 31: July 28, 2025: Gold Mineralization in Trenching Program
TSXV : RDS OTCQX : RMRDF 31 July 28, 2025: Gold Mineralization in Trenching Program TX Z-Fold Quartz Vein First Trench of 2025 summer program S3p 30m east of O’Brien coreshack and office Semi- Massive Py- Po Band Visible gold in classic setting: 3m wide zone of high strain, biotite alteration, sulph
Slide 32: MRE 2026 (US$2,500, 2.2 g/t Au Cut-Off)
TSXV : RDS OTCQX : RMRDF 32 MRE 20261 (US$2,500, 2.2 g/t Au Cut-Off, 1.2m Minimum Width, 90% Recovery) Indicated Mineral Resources (koz) Tonnes (kt) Grade (g/t Au) Oz (koz Au) 501 582 628 Indicated Mineral 3,493 5.59 628 289 Resources Inferred Mineral 10,368 5.08 1,692 Williamson SLR March 2023 SLR
Slide 33: O'Brien 2025 PEA: Underground Mine Design (2)
TSXV : RDS OTCQX : RMRDF 33 O’Brien 2025 PEA: Underground Mine Design (2) Twin portals and 4.5mx4.5m ramp access 20 tonne trucks and vertical conveyor from 300m level to surface 86km of development and 25m levels Does not utilize historic O’Brien Mine. Utilizes Kewagama Mine infrastructure for venti
Slide 34: O'Brien 2025 PEA: Underground Mine Design (3)
TSXV : RDS OTCQX : RMRDF 34 O’Brien 2025 PEA: Underground Mine Design (3) 56% of mined ounces in the PEA mine plan are from Indicated Mineral Resources and 44% from Inferred Mineral Resources Indicated/Inferred Mineral Resource blocks are equally distributed through the 11-year life Future infill dr
Slide 35: O'Brien 2025 PEA: Surface Facilities
TSXV : RDS OTCQX : RMRDF 35 O’Brien 2025 PEA: Surface Facilities No mill, tailings facility, or major surface earthworks No requirement for major access or power Water Treatment infrastructure No camp, surface maintenance (small vehicle Historic Mine Waste Rock maintenance at existing O’Brien facili
Slide 36: O'Brien 2025 PEA: Schedule, Permitting, EA
TSXV : RDS OTCQX : RMRDF 36 O’Brien 2025 PEA: Schedule, Permitting, EA O’Brien is subject to the Québec Environmental Quality Act and is expected to be subject to a Québec Environmental Impact Assessment and Review. The Project is not expected to be subject to a Federal Impact Assessment procedure b
Slide 37: O'Brien 2025 PEA: Costs
TSXV : RDS OTCQX : RMRDF 37 O’Brien 2025 PEA: Costs LOM Capital Costs (C$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 38: O'Brien 2025 PEA: Sensitivities
TSXV : RDS OTCQX : RMRDF 38 O’Brien 2025 PEA: Sensitivities Valuation Sensitivities to Gold Price (C$M)note1,2 Gold Price (US$/oz) $1,800 $2,200 $2,550 $3,000 $3,300 $4000 1. 2. See "Non-IFRS Measures". Payback is defined as achieving cumulative Price Case Downside Consensus Upside “Spot” positive f
Slide 39: Neighbouring Mills to the O'Brien Project: Quebec
TSXV : RDS OTCQX : RMRDF 39 Neighbouring Mills to the O’Brien Project: Quebec NWMF"GB#-CoFK+MRRCS"+BEBGBMR mEMMWB#-CfB"#GCDBEE 1. LaRonde Complex LNWEKF"GBK#CoFKpM+GR NO#MF In+K@FGCDB#MR includes two mines DB#MCSMMA LEAMFCDB#M (LaRonde Mine, LZ5 Mine) >?FK@-?W@G hTACGWA;h= which feed into two B"CK#A
Slide 40: Neighbouring Mills to the O'Brien Project: Ontario
TSXV : RDS OTCQX : RMRDF 40 Neighbouring Mills to the O’Brien Project: Ontario O="C+8FIAAGC?L"SSA9+LF#F8F"S !"##ABC""DAEF## 4(R#OGWM,C LM(9OeC3"A"A. ec=#?C+8F?IAGC?u"L8S OPI"C G+IA-."CFL+IAMF#1"C EFI"A9""W !"##ABC""D4A5F..FISAT"S8 5>C?@A>=@8 ;4;YYA8=W B+=+LF8E B4CBaA8=W o?."AEF## 4(RGHC!"##"A%,C L(S