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 Corporate Update, November 2025 TSXV:RDS OTCQX:RMRDF
Slide 2: Cautionary Statement Regarding Forward-Looking Information
TSXV : RDS OTCQX : RMRDF 2 Cautionary Statement Regarding Forward-Looking Information Thi s presentation contains "forward-looki ng information" within the meaning of the appli cable Canadian securities other ri sks of the mining indust ry; delays in obtaining gov ernment al approvals or financing;
Slide 3: Cautionary Statement Regarding Forward-Looking Information
TSXV : RDS OTCQX : RMRDF 3 Cautionary Statement Regarding Forward-Looking Information Qualified Persons Al l-in Sustaining Cost (AISC) and AISC per Ounce Disclosure of a scient ific or technical nat ure in this presentation was prepared under the superv isi on of Mr. Richard AISC is reflective of al
Slide 4: Why Radisson: High-Grade. Growing. Québec's Abitibi.
TSXV : RDS OTCQX : RMRDF 4 WH Y RAD IS SON A H I G H - G R A D E R E SO U R C E ( EF F E C T I V E M AY 2 0 2 5 ) 1 High-Grade. Exploring the Historic O’Brien Gold Project in Québec’s Abitibi Growing. 0.58 Moz Ind. 0.93 Moz Inf. (2.2Mt at 8.2 g/tAu) (6.7 Mt at 4.4 g/t Au) Québec’s Abitibi. A G RO W
Slide 5: Management and Board
TSXV : RDS OTCQX : RMRDF 5 Board Pierre Beaudoin Peter MacPhail | Director Chairperson ▪ 35+ years of mining experience. Formerly COO (2015- 2022) of Alamos Gold, Aurico and Northgate Minerals. ▪ 30+ years of mining experience. ▪ Led development of Young Davidson mine, La Yaqui ▪ Formerly COO (2018-
Slide 6: A History of Hub-and-Spoke Mining Complexes
TSXV : RDS OTCQX : RMRDF 6 QU É B EC ’ S A B ITI B 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 ROUYN- Westwood LaRonde Lake Br
Slide 7: O'Brien Gold Project
TSXV : RDS OTCQX : RMRDF 7 LaRonde Westwood- Doyon O’Brien Gold Project
Slide 8: O'Brien 2025 PEA: Basis of Study
TSXV : RDS OTCQX : RMRDF 8 Westwood- O’Brien 2025 PEA: Basis of Study Doyon Complex Assumes off-site toll milling based on the results of a recent milling assessment and metallurgical study that demonstrated the potential LaRonde compatibility of the nearby Doyon gold mill, part Complex of IAMGOLD C
Slide 9: O'Brien 2025 PEA: Summary Results
TSXV : RDS OTCQX : RMRDF 9 O’Brien 2025 PEA: Summary Results Value (After Tax)1 Assumptions US$2,550 Au US$3,300 Au Gold Price, Stope Optimization & MRE US$2,000/oz Au NPV5% C$532M C$871M Gold Price, Financial Analysis US$2,550/oz Au IRR 48% 74% US$:C$ F/X $0.73 Payback (years) 2.0 1.1 Conceptual To
Slide 10: O'Brien 2025 PEA: Metallurgy and Doyon Milling Assessment
TSXV : RDS OTCQX : RMRDF 10 O ’ B R I EN PE A B A S E D O N O F F - S I TE M I L L I N G O’Brien 2025 PEA: Metallurgy and Doyon Milling Assessment Westwood Sept 2024: MOU with IAMGOLD for milling assessment -Doyon at the Doyon Mill (Non-binding, Non-exclusive)1 Milling Assessment 86% to 96% recovery
Slide 11: O'Brien 2025 PEA: Underground Mine Design
TSXV : RDS OTCQX : RMRDF 11 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 12: Exploration and Growth: Cadillac-Bousquet District
TSXV : RDS OTCQX : RMRDF 12 Exploration and Growth: Cadillac-Bousquet District O’Brien Project
Slide 13: Mineral Resource and Exploration Target
TSXV : RDS OTCQX : RMRDF 13 5.2 Km W WEST O’BRIEN O’BRIEN EAST O’BRIEN E Thompson Cadillac Kewagama Surface 75% of existing - 250m Mineral Resource 700 m -600m 1750m - 500m Open Trend 5 - 750m 100% Trend 4 -900m Trend 3 MRE for PEA, 2.2 g/t Au Cutoff Trend 2 - 1000m (US$2,000, 1.2m minimum width, 90
Slide 14: Deep Exploration and Growth: Proof of Concept Drill Results
TSXV : RDS OTCQX : RMRDF 14 Deep Exploration and Growth: Proof of Concept Drill Results As of October 2025, multiple deep drill holes + wedges have intersected high-grade mineralization in multiple locations A 140,000m step-out drill program with up to 8 drill rigs is ongoing to test the full potent
Slide 15: Vein Modelling in Real Time with Drilling
TSXV : RDS OTCQX : RMRDF 15 Vein Modelling in Real Time with Drilling
Slide 16: Significant Mineralization Extension Beneath Historic Mine
TSXV : RDS OTCQX : RMRDF 16 Significant Mineralization Extension Beneath Historic Mine July 16, 2025: seven wedges from pilot drill hole OB-337-24 up to 500m beneath the historic O’Brien Mine All holes intersected multiple veins with high-grade New 250mx250m zone of mineralization shows clear contin
Slide 17: Continuity of Mineralization 500m Below the Historic Mine
TSXV : RDS OTCQX : RMRDF 17 Continuity of Mineralization 500m Below the Historic Mine Mapping at the 1000m level of the historic O’Brien mine shows a principal mining stope and 3 undeveloped parallel zones. All eight new holes 500m below the former mine intersected high-grade mineralization and reso
Slide 18: December 9, 2024: 1.35 kg/t Au at Re-Discovered Jewelry Box
TSXV : RDS OTCQX : RMRDF 18 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 19: July 28, 2025: Gold Mineralization in Trenching Program
TSXV : RDS OTCQX : RMRDF 19 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- Massive P y- Po Ban d Visible gold in classic setting: 3m wide zone of high strain, biotite alteration, sulphides
Slide 20: Next Steps
TSXV : RDS OTCQX : RMRDF 20 Next Steps Pursuing Exploration Growth Pursuing Development Path The PEA is a “Snap-Shot” of a The PEA offers a Credible and Practical Growing Project Development Path for O’Brien Significant Success with Ongoing Environmental Baseline Data leading Exploration to a future
Slide 21: Capitalization and Balance Sheet
TSXV : RDS OTCQX : RMRDF 21 Capitalization and Balance Sheet Shareholder Distribution Tickers TSXV:RDS | OTCQX:RMRDF 1 7% Share Price C$0.67 Management & Market Cap 1 C$285 Million 40% Insiders 2 Public Float Common Shares 2 426 Million 26% Options 17 Million Institutional Shareholders 2 Warrants 2
Slide 22: 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 23: Appendix
Appendix
Slide 24: O'Brien Gold Project
TSXV : RDS OTCQX : RMRDF 24 O’Brien Gold Project 24
Slide 25: Well Understood Geology
TSXV : RDS OTCQX : RMRDF 25 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 26: O'Brien Mineralogy
TSXV : RDS OTCQX : RMRDF 26 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 27: Basis of Estimate: Indicated and Inferred Mineral Resources
TSXV : RDS OTCQX : RMRDF 27 Indicated Mineral Resources Inferred Mineral Resources Basis of Estimate Tonnage (kt) Grade (g/t Au) Oz (koz Au) Tonnage (kt) Grade (g/t Au) Oz (koz Au) MRE 2023, 4.5 g/t Au Cutoff (US$1,600, 1.2m minimum width, 85% 1,517 10.3 501 1,601 8.7 446 Recovery) MRE for PEA, 2.2
Slide 28: O'Brien 2025 PEA: At a Glance
TSXV : RDS OTCQX : RMRDF 28 O’Brien 2025 PEA: At a Glance General Inputs Westwood- LaRonde Discount Rate 5% Doyon Gold Price US$2,550/oz FX Rate 0.73 CAD:USD LOM Production Life of Mine 11.0 years Total Resource Milled 4.6 Mt Total Waste Mined 3.3 Mt Average Mill Feed Grade 5.0 g/t Gold Production (
Slide 29: O'Brien 2025 PEA: Underground Mine Design (2)
TSXV : RDS OTCQX : RMRDF 29 O’Brien 2025 PEA: Underground Mine Design (2) Twin portals and 4.5mx4.5m ramp access 20 tonne trucks and vertical conveyor from 300m level to surface 86km of development and 25m levels Does not utilize historic O’Brien Mine. Utilizes Kewagama Mine infrastructure for venti
Slide 30: O'Brien 2025 PEA: Underground Mine Design (3)
TSXV : RDS OTCQX : RMRDF 30 O’Brien 2025 PEA: Underground Mine Design (3) 56% of mined ounces in the PEA mine plan are from Indicated Mineral Resources and 44% from Inferred Mineral Resources Indicated/Inferred Mineral Resource blocks are equally distributed through the 11-year life Future infill dr
Slide 31: O'Brien 2025 PEA: Surface Facilities
TSXV : RDS OTCQX : RMRDF 31 O’Brien 2025 PEA: Surface Facilities No mill, tailings facility, or major surface earthworks No requirement for major access or power Water Treatment infrastructure No camp, surface maintenance (small vehicle Historic Mine Waste Rock maintenance at existing O’Brien facili
Slide 32: O'Brien 2025 PEA: Schedule, Permitting, EA
TSXV : RDS OTCQX : RMRDF 32 O’Brien 2025 PEA: Schedule, Permitting, EA O’Brien is subject to the Québec Environmental Quality Act and is expected to be subject to a Québec Environmental Impact Assessment and Review. The Project is not expected to be subject to a Federal Impact Assessment procedure b
Slide 33: O'Brien 2025 PEA: Costs
TSXV : RDS OTCQX : RMRDF 33 O’Brien 2025 PEA: Costs LOM Capital Costs (C$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 34: O'Brien 2025 PEA: Costs
TSXV : RDS OTCQX : RMRDF 34 O’Brien 2025 PEA: Costs Valuation Sensitivities to Gold Price (C$M)note1,2 Gold Price (US$/oz) $1,800 $2,200 $2,550 $3,000 $3,300 1. 2. See "Non-IFRS Measures". Pay back is defined as achieving cumulative positive Downside Consensus Upside Spot free cashflow after all cas
Slide 35: Neighbouring Mills to the O'Brien Project: Quebec
TSXV : RDS OTCQX : RMRDF 35 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 36: Neighbouring Mills to the O'Brien Project: Ontario
TSXV : RDS OTCQX : RMRDF 36 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