Slide 1: The O'Brien Gold Project: A New Vision for an Historic High-Grade Gold Mine
The O'Brien Gold Project A New Vision for an Historic High-Grade Gold Mine in Québec's Abitibi September 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 HIGH-GRADE RESOURCE (EFFECTIVE JAN 2026)1 Updated 2026 Mineral Resource Estimate Published March 2, 2026 Exploring and Growing the 0.63 Moz Indicated 1.69 Moz Inferred Historic O’Brien Gold 3.5 Mt at 5.59 g/t Au 10.4 Mt at 5.08 g/t Au Project in Québec’s Abiti
Slide 5: C$57M to Support Advanced Underground Exploration Program
TSXV : RDS OTCQX : RMRDF 5 AGNICO EAGLE INVESTMENT STRATEGIC INVESTMENT (CLOSED SEPTEMBER 1, 2026)1 C$1.07/unit. 19% premium to 20-day VWAP and 6% to spot. Half warrant at C$57M to Support C$1.39. 10.45% ownership of issued/outstanding and 14.90% partially diluted. Advanced Underground USE OF PROCEE
Slide 6: Management and Board
TSXV : RDS OTCQX : RMRDF 6 Board Pierre Beaudoin Peter MacPhail | Director Chairperson ▪ 35+ years of mining experience. Formerly COO (2015-2022) of ▪ 30+ years of mining experience Alamos Gold, Aurico and Northgate Minerals ▪ Formerly COO (2018-2024) of SilverCrest Metals Inc. for Las Chipas Projec
Slide 7: A History of Hub-and-Spoke Mining Complexes
TSXV : RDS OTCQX : RMRDF 7 QUÉBEC’S ABITIBI A History of Hub-and- N Spoke Mining Complexes Mines and Mining Services in Québec’s Abitibi (+100 Moz Au endowment) Positioned within the 25 Moz Cadillac- AGNICO: LaRonde IAMGOLD: Bousquet Camp on the Cadillac-Larder ROUYN- Doyon- Lake Break NORANDA Westw
Slide 8: O'Brien located 3km from LaRonde Complex and 21km from Westwood-Doyon
TSXV : RDS OTCQX : RMRDF 8 O’Brien located 3km (direct) from Westwood- LaRonde Complex and 21km Doyon (by road) from Westwood-Doyon Complex LaRonde Three mills, two operating tailings facilities, multiple shafts, highway, powerline, railway O’Brien Gold Project Cadillac
Slide 9: Exploration and Growth
Exploration and Growth
Slide 10: Adjacent Ore Deposits in the Cadillac-Bousquet District
TSXV : RDS OTCQX : RMRDF 10 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 11: O'Brien Geology
TSXV : RDS OTCQX : RMRDF 11 O’Brien Geology Ore Zone in surface trenching 30m east of O’Brien coreshack illustrates typical geological relationships Z-Fold Quartz Vein Quartz-sulphide veins with coarse VG within Piché Formation adjacent to the Cadillac-Larder Lake Break High strain, with biotite alt
Slide 12: O'Brien Geology: Multiple Veins and a High-Graded Historic Mine
TSXV : RDS OTCQX : RMRDF 12 O’Brien Geology: Multiple Veins and a High-Graded Historic Mine
Slide 13: Deep Exploration and Growth: Successful Step-Out Drilling
TSXV : RDS OTCQX : RMRDF 13 Deep Exploration and Growth: Successful Step-Out 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 Result: deep drill holes + wedges have intersected high-grade Drill Results
Slide 14: Testing Project Scope
TSXV : RDS OTCQX : RMRDF 14 Testing Project Scope 2026 MRE Update, 2.2 g/t Au Cutoff (US$2,500, 1.2m minimum width, 90% Recovery) Indicated Resource Inferred Resource 0.63 Million Oz 1.69 Million Oz (3.49 Mtonnes at 5.59 g/t) (10.37 Mtonnes at 5.08 g/t) Additional Exploration Target to 2km Depth Dev
Slide 15: September Drilling Completed
TSXV : RDS OTCQX : RMRDF 15 September 21, 2026: Drilling Completed since March 2026 MRE
Slide 16: Recent Drilling Highlights
TSXV : RDS OTCQX : RMRDF 16 Recent Drilling Highlights September 21, 2026: O’Brien Mine East Growing Inc. 68.24 g/t Au over 6.2m
Slide 17: Recent Drilling Highlights
TSXV : RDS OTCQX : RMRDF 17 Recent Drilling Highlights September 2, 2026: Closing the Undrilled Trend 1-2 Gap inc. 52.34 g/t Au over 3.0m
Slide 18: Recent Drilling Highlights
TSXV : RDS OTCQX : RMRDF 18 Recent Drilling Highlights July 7, 2026: Highest Ever Drill Assay in History of Project 316 g/t Au over 5.1m
Slide 19: Recent Drilling Highlights
TSXV : RDS OTCQX : RMRDF 19 Recent Drilling Highlights July 7, 2026: Highest Ever Drill Assay in History of Project OB-26-385W4 1,603.95 g/t Au over 1.0 metre (within 316.31 g/t Au over 5.1 metres). OB-26-384W1 132.28 g/t Au over 1.3 metres (within 46.22 g/t Au over 3.9 metres)
Slide 20: Recent Drilling Highlights
TSXV : RDS OTCQX : RMRDF 20 Recent Drilling Highlights April 30, 2026: Deepest Intercept to Date at 1.9 Km
Slide 21: 18 Month Drilling Success
TSXV : RDS OTCQX : RMRDF 21 WHY RADISSON Drill Results Reported Over the Last 12 Months 18 Month Drilling Success Holes “Hit” “Hit” 1. Represents 100% of drill holes completed and assayed (Contains News Release Best Intercept2 2. The O’Brien Gold Project MRE effective May 6, 2025 utilizes a 2.20 g/t
Slide 22: MRE 2026 Indicated and Inferred Mineral Resources
TSXV : RDS OTCQX : RMRDF 22 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 23: 2026 MRE Sensitivity by Cut-Off
TSXV : RDS OTCQX : RMRDF 23 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 0.43 Moz (1.6 Mt at (0.6 Mt at by Cut-Off 12.7 g/t Au) 8.4 g/t Au) The updated MRE for the O’Brien Gold Project utilizes
Slide 24: Mine Development
Mine Development \
Slide 25: O'Brien 2025 PEA: Basis of Study
TSXV : RDS OTCQX : RMRDF 25 Westwood- O’Brien 2025 PEA: Basis of Study Doyon Complex “Snap-shot” study using 2025 MRE, based on drilling to the end of 2022. Does not incorporate the recently expanded 2026 MRE. 140,000m fully LaRonde funded drill program ongoing. Complex Assumes off-site milling base
Slide 26: O'Brien 2025 Metallurgy Study
TSXV : RDS OTCQX : RMRDF 26 O’Brien 2025 Metallurgy Study1 2024-2025 metallurgical program undertaken at the Lakefield, Ont. facilities of SGS Canada under the supervision of Ausenco Engineering. 35 samples of mineralized core from 0.8 g/t to 49.1 g/t in four composite samples for each principal Pic
Slide 27: Gold Price Assumptions and Sensitivities
TSXV : RDS OTCQX : RMRDF 27 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 28: Corporate
Corporate \
Slide 29: Next Steps
TSXV : RDS OTCQX : RMRDF 29 Next Steps Pursuing Exploration Growth Pursuing Development Path Significant Success with Ongoing Integration into Existing Mine-and-Mill Exploration Complex or Stand Alone? Fully Funded 140,000m drill C$57M investment by Agnico-Eagle to program with up to 8 rigs through
Slide 30: Capitalization and Balance Sheet
TSXV : RDS OTCQX : RMRDF 30 Capitalization and Balance Sheet Shareholder Distribution Tickers TSXV:RDS | OTCQX:RMRDF 35.4% 6.0% Management & 1 Public Float Insiders Share Price C$1.17 2 Market Cap C$624 Million 2 25.0% Common Shares 512 Million Institutional 2 10.4% Shareholders Options 15 Million A
Slide 31: Contact Information
Contact Information Matt Manson President, CEO & Director mmanson@radissonmining.com Hubert Parent-Bouchard Chief Financial Officer hpbouchard@radissonmining.com Radisson Mining Resources Inc. 50 rue du Petit-Canada Kristina Pillon Rouyn-Noranda, Qc J0Y 1C0 Manager, Investor Relations Investor Inqui
Slide 32: Appendix
Appendix
Slide 33: O'Brien Gold Project
TSXV : RDS OTCQX : RMRDF 33 O’Brien Gold Project 33
Slide 34: Well Understood Geology
TSXV : RDS OTCQX : RMRDF 34 Well Understood Geology Good understanding of vein morphology and continuity from mapping of historic O’Brien workings At large-scale the veins are continuous, sub-parallel to the stratigraphy and are developed within multiple units of the Piche Group. Vein Model with 134
Slide 35: O'Brien 2025 PEA: Sensitivities
TSXV : RDS OTCQX : RMRDF 35 O’Brien 2025 PEA: Sensitivities Valuation Sensitivities to Gold Price (C$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 f
Slide 36: O'Brien 2025 PEA: Underground Mine Design
TSXV : RDS OTCQX : RMRDF 36 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$2,000/oz Au 11 year Life. Years 2–8: 1,160 tpd prod. stopes PEA contemplates 2,000 tpd of mill capacity Hence, all
Slide 37: O'Brien 2025 PEA: Underground Mine Design (2)
TSXV : RDS OTCQX : RMRDF 37 O’Brien 2025 PEA: Underground Mine Design (2) Twin portals and 4.5mx4.5m ramp access 20 tonne trucks and vertical conveyor from 300m level to surface 86km of development and 25m levels Does not utilize historic O’Brien Mine. Utilizes Kewagama Mine infrastructure for venti
Slide 38: O'Brien 2025 PEA: Underground Mine Design (3)
TSXV : RDS OTCQX : RMRDF 38 O’Brien 2025 PEA: Underground Mine Design (3) 56% of mined ounces in the PEA mine plan are from Indicated Mineral Resources and 44% from Inferred Mineral Resources Indicated/Inferred Mineral Resource blocks are equally distributed through the 11-year life Future infill dr
Slide 39: "Trends" and "Gaps" at O'Brien
TSXV : RDS OTCQX : RMRDF 39 “Trends” and “Gaps” at O’Brien Previous drilling at O’Brien has defined steeply plunging mineralization “Trends” separated by “Gaps”, a pattern that defines the character of the mineral Historic O’Brien Mine Historic O’Brien Mine resource block model and influences explor
Slide 40: O'Brien 2025 PEA: Surface Facilities
TSXV : RDS OTCQX : RMRDF 40 O’Brien 2025 PEA: Surface Facilities No mill, tailings facility, or major surface earthworks No requirement for major access or power Water Treatment infrastructure No camp, surface maintenance (small vehicle Historic Mine Waste Rock maintenance at existing O’Brien facili
Slide 41: O'Brien 2025 PEA: Costs
TSXV : RDS OTCQX : RMRDF 41 O’Brien 2025 PEA: Costs LOM Capital Costs (C$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 42: O'Brien 2025 PEA: Schedule, Permitting, EA
TSXV : RDS OTCQX : RMRDF 42 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 43: Neighbouring Mills to the O'Brien Project: Quebec
TSXV : RDS OTCQX : RMRDF 43 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 LaRond
Slide 44: Neighbouring Mills to the O'Brien Project: Ontario
TSXV : RDS OTCQX : RMRDF 44 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, Gowes