Iamgold Corporation · TSX:IMG
Iamgold — Corporate Update (October 2026)
56 slides from Iamgold's corporate update, October 2026
Slide 1: Côté Gold Mine Investor Tour
CÔTÉ GOLD MINE INVESTOR TOUR October 2026 1
Slide 2: Site Tour Agenda
SITE TOUR AGENDA TIME EVENT 05:15 Bus Departure – boxed breakfast on the bus 08:00 Arrival at Côté, PPE pick-up, safety induction at PCC Tour AHS Control Centre TMF 08:45 – Pit Lookout & Mining Ops Processing Plant 12:00 Truck Shop 12:00 Remove PPE 12:30 Lunch at Main Camp 13:30 Exploration & Co
Slide 3: Cautionary Statement
CAUTIONARY STATEMENT All information included or incorporated by reference in this presentation, including any information as to the Company’s vision, strategy, future financial or operating performance and other statements that express management’s expectations or estimates of future performance or
Slide 4: Cautionary Statement
CAUTIONARY STATEMENT CAUTIONARY NOTE TO U .S . INVESTORS REGARDING DISCLOSURE OF MINERAL RESERVE AND MINERAL RESOURCE ESTIMATES The mineral resource and reserve estimates contained in this presentation have been prepared in accordance with National Instrument 43-101 – Standards of Disclosure for Min
Slide 5: IAMGOLD & Côté Gold Team
IAMGOLD & CÔTÉ GOLD TEAM Renaud Adams • 30+ years of experience in global mining Maarten Theunissen • Chartered Accountant with 18+ years of President & CEO experience in senior executive positions and CFO experience in the mining industry, including (With IMG since 2023) mining operations located i
Slide 6: Operations Overview
OPERATIONS OVERVIEW Operating Advanced Exploration CÔTÉ GOLD1 Ontario, Canada (70% IMG | 30% SMM1) NELLIGAN MINING COMPLEX5 Start-up 2024 Quebec, Canada (100% IMG) Mine type Open pit Estimated mine life ~2041+ Status Pre-production (70%) 270,000 – 310,000 oz Deposit type Open pit/Sat. UG (100%) 390,
Slide 7: Côté Gold Mine
wy COTE.GOLD MINE Fa
Slide 8: Côté Gold Highlights
CÔTÉ GOLD HIGHLIGHTS One of Canada’s largest gold mines A flagship long-life operation in a top-tier mining jurisdiction 20M+ Ounces Resource Base Current Mineral Resources of 20.3 Moz M&I and 3.5 Moz Inf. with expansion potential >$550M Attributable Free Cash Flow in 2026 Operations expected to imp
Slide 9: Côté Gold
CÔTÉ GOLD Ownership: 70:30 IAMGOLD & SMM Location: Ontario – 125 km SW of Timmins, 175 km N of Sudbury On the traditional territory of the Mattagami and Flying Post First Nations Acquisition: • Acquired in April 2012 for $505 M from Trelawney Mining • Mineral Resources: 0.9 Moz Indicated and 5.9 Moz
Slide 10: Côté Gold: Large-Scale and Long-Life Mine
CÔTÉ GOLD: LARGE -SCALE AND LONG -LIFE MINE Mines acquired in last 15 years TOP 12 GOLD MINES IN CANADA BY PRODUCTION1 M&I Mineral Resources 2 (inclusive of reserves) (koz ) 715 36 590 485 3 4 440 438 4 390 20 340 300 280 240 230 13 215 12 8 6 6 5 4 3 1 3 Detour Lake Malartic Meadowbank Côté Gold Bl
Slide 11: Site Layout
SITE LAYOUT G SITE KEY J A A Open Pit B B Ore Stockpiles C Primary & Secondary Crushing D Coarse Ore Dome H B E Processing Plant F Offices & Main Control Rooms I G Mine Rock Area C H Truck Shop I Warehouse J Camp Accommodations D K K Assay Lab E F 11
Slide 12: Open Pit – Mining Resources
OPEN PIT – MINING RESOURCES B D C F A E SITE KEY MINING FLEET PRODUCTIVITY TARGETS A Open Pit 24 CAT 793 Haul Trucks – 230T capacity 150 kt ex-pit daily target B Overburden Dump 2 CAT 6060 Electric Hydraulic Shovels 1352m Pit Viper daily target C HR4 – Road to Mine Rock Area (MRA) 1 CAT 995 Wheel Lo
Slide 13: Tailings Management Facility - TMF
TAILINGS MANAGEMENT FACILITY - TMF A F B C A G D G E SITE KEY A AMT placement areas E HR5 – Road to Pit (AOZ) B AR1 – Main site access road F Barge Pad and Evaporators C AMT Calibration Pad G Tailings and Reclaim Pipelines D East Seepage Collection Ditch 13
Slide 14: Côté Gold – A Roadmap
14 CÔTÉ GOLD – A ROADMAP Primary Goals Health & Safety Production Costs Sustainability People Our Journey 2028+ 2026 - 2027 GROWTH PLATFORM 2024 - 2025 STABILITY / RELIABILITY Transition to ‘growth mode’ facilitated by strict operational controls – BACK TO BASICS Saddle Strategy and Gosselin Improve
Slide 15: Q3 2026 Operating Results
Q3 2026 OPERATING RESULTS (100% basis, unless otherwise stated) Q3 2026 Q3 2025 YTD 2026 2026 Guidance Ore mined kt 3,797 3,841 10,422 Q3 OVERVIEW Grade mined g/t 0.93 0.96 0.93 • Production (70%): 64,400 oz | (100%): 92,000 oz Material mined – total kt 12,410 11,464 33,473 ~48,000 MINING Ore milled
Slide 16: Life of Mine to Date Operating Results
LIFE OF MINE TO DATE OPERATING RESULTS MINING & STRIP RATIO THROUGHPUT & GRADE 14.0 4.0 3 1.5 2.5 10.5 3.0 1.3 2 M tonnes M tonnes Strip ratio g/t 7.0 2.0 1.5 1.1 1 3.5 1.0 0.9 0.5 0.0 0.0 0 0.7 Q1/24 Q2/24 Q3/24 Q4/24 Q1/25 Q2/25 Q3/25 Q4/25 Q1/26 Q2/26 Q3/26 Q1/24 Q2/24 Q3/24 Q4/24 Q1/25 Q2/25 Q3/
Slide 17: Cost Categories
COST CATEGORIES Mining 1 Milling 1 G&A 1 Maintenance Contractor - Other Other and Supplies Insurance Energy Costs G&A, Rentals 5% Energy Costs 4% Crushing 6% 3% Maintenance 4% 4% 7% 17% and Supplies Consumable 25% Consulting Costs Fees Labour Costs 13% 5% 11% Contractor - G&A Costs Maintenance 6% Co
Slide 18: Consolidated Resource
CONSOLIDATED RESOURCE • Updated Mineral Resource estimate reflects integration of the Côté and Gosselin zones into a consolidated block model • Incorporated interconnecting saddle area between Côté and Gosselin • Gold price of $2,500 per ounce (up from $2,100/oz for Côté and $2,500/oz for Gosselin)
Slide 19: Reconciliation
RECONCILIATION EXCELLENT RECONCILIATION BETWEEN GEOLOGICAL AND GRADE CONTROL MODELS 2025 YTD 2026 Marginal variability seen in grade and tonnage estimates Factor Tonnes Grade Ounces Factor Tonnes Grade Ounces between designs, production estimates, and mill feed F1 -3% -5% -8% F1 2% -9% -7% estimates
Slide 20: Côté Gold Long Section
CÔTÉ GOLD LONG SECTION Priority Target 1. M&I resources are inclusive of P&P Mineral Reserves, refer to Mineral Reserves and Resources Statement in Appendix. 20 2. Updated assumptions include a gold price of $2,500 per ounce (up from $2,100/oz for Côté and $2,500/oz for Gosselin) and a consolidated
Slide 21: Mining
IAMGOLD | febEsinen.
Slide 22: Autonomous Operations
AUTONOMOUS OPERATIONS AUTONOMOUS EQUIPMENT Côté Gold utilizes autonomous haulage and drilling with primary equipment: • 24 autonomous CAT 793F haul trucks • 2 CAT 6060E electric shovels • 4 CAT 994/5K front-end loaders • Viper 231 autonomous drills Autonomous fleet is controlled from an INTEGRATED O
Slide 23: Mining & Material Movement
MINING & MATERIAL MOVEMENT MINING OPERATIONS (100% basis, unless Q3 Q4 Q1 Q2 Q3 otherwise stated) 2025 2025 2026 2026 2026 Tonnes mined – Waste kt 7,585 6,574 5,773 8,664 8,613 Tonnes mined – Ore kt 3,848 4,491 3,553 3,072 3,797 Material mined – total kt 11,433 11,064 9,326 11,736 12,410 Grade Mined
Slide 24: Mining Performance
MINING PERFORMANCE DRILLING 5 – Pit Vipers and 5 – D65s • Fleet availability continuing to improve with significant uplift through 2026 • Additional D65 drills added to fleet to meet pre-shear requirements BLASTING • Ongoing collaborative relationship with explosives vendor for improved performance
Slide 25: Processing
PROCESSING
Slide 26: Côté Primary and Secondary Crushing Circuits
CÔTÉ PRIMARY AND SECONDARY CRUSHING CIRCUITS Lime Silo Screening Building Fire Water Systems Coarse Ore Dome Fine Ore Bin Secondary Crushers Primary Crusher HPGR 26
Slide 27: Côté Processing Plant
CÔTÉ PROCESSING PLANT Pre-leachO2 Storage & From Primary & Secondary Thickener Distribution Process Water Secondary Tank Leach Tanks(10) Crushing Cyclones 30 hrs Ball Mill Cyclones Cyanide Tailings Destruction Thickener SO2 Ball Mill Tailings Pump Verti-Mills (2) CIP Tanks (8) Refinery ADR Cyanide M
Slide 28: Côté Processing Flowsheet
CÔTÉ PROCESSING FLOWSHEET KEY COMPONENTS Dry side 1 1 Traditional primary/secondary crushing 6 7 • Additional secondary cone crusher commissioned Dec 2025 2 Primary conveyor CV-10 2 3 Coarse ore stockpile in covered dome 3 4 HPGR crushing in tertiary stage Two stages of grinding: 5 5 Ball mill 6 Ver
Slide 29: Processing Plant
PROCESSING PLANT RAMP UP ACHIEVEMENTS MILLING OPERATIONS ✓ Capacity Management: Plant demonstrated early the ability to Q3 Q4 Q1 Q2 Q3 (100% basis, unless operate at or above nameplate throughput rates, increasing otherwise stated) 2025 2025 2026 2026 2026 availability was priority Ore milled kt 2,9
Slide 30: Tailings Management Facility
TAILINGS MANAGEMENT FACILITY DESIGN • 203 Mt tailings (233 Mt design requires +5 m raise) • 2026 crest elevation: 423 m El • Ultimate crest elevation: 463 m El • Dam construction: Centerline, and Downstream raising methodology • TMF is closed circuit with tailings water and seepage captured and re-c
Slide 31: Mining & Processing Overview
MINING & PROCESSING OVERVIEW Mining progress: 1 Over 124 Mt of rock mined, 37 Mt of ore, and 87 Mt waste. Over 1,591 km of drilling, and 35,144,000 kg of explosives blasted. Sequence Update: Mining started at 382 mL and progressed to 232 m 2 Bench in Phase 0 and Phase 1 down to 292 mL. Push back of
Slide 32: Next Steps
NEXT STEPS
Slide 33: Côté Expansion Opportunity
CÔTÉ EXPANSION OPPORTUNITY UPDATED MINE PLAN CONCEPTUAL DIAGRAM OF CÔTÉ AND GOSSELIN PITS • Updated technical report and mine plan in Q4 2026 to outline longer mine life and increased reserves at an increased capacity • Based on updated Mineral Resources of 20.3 Moz M&I and 3.5 Moz Inferred (June 20
Slide 34: Project: Third Vertimill (2027)
PROJECT: THIRD VERTIMILL (2027) The project adds grinding flexibility and redundancy while preparing the circuit for future production requirements 1. Operational resilience 2. Throughput protection 3. Improved Recovery 4. Future production growth 34
Slide 35: Expansion: Baseline Studies & Community Engagement
EXPANSION: BASELINE STUDIES & COMMUNITY ENGAGEMENT BASELINE EVALUATIONS • Surface and groundwater, Terrestrial biology, Aquatic study, Flora evaluation • Dust and noise OTHER STUDIES • Archeology, Fish habitat compensation • Geochemistry evaluation, Groundwater modeling COMMUNITY ENGAGEMENT • Progre
Slide 36: Responsibility and Community
RESPONSIBILITY AND COMMUNITY A sustainable and positive legacy 36
Slide 37: Employment & Procurement
EMPLOYMENT & PROCUREMENT WHERE DO OUR EMPLOYEES COME FROM? PROCUREMENT Côté Gold 2025 • Operating costs: $361 million • Capital expenditures: $127 million Europe, 1% USA, 3% Northern Ontario, Rest of Canada, 23% 58% 781 EMPLOYEES Southern Ontario, 15% 37
Slide 38: The Bigger Picture
THE BIGGER PICTURE PURPOSE MINING . REDEFINED . Why we exist Forever VISION A leading Canadian-focused gold producer… Where we are going 10 years OUR BIG 12 - 18 Become a stable, high-performing operation… What is possible and why OPPORTUNITY months SUSTAINABILITY IS ONE OF THE WAYS WE LIVE MINING.
Slide 39: Health & Safety: A Core Focus
HEALTH & SAFETY: A CORE FOCUS 2026 • Continued implementation of CRM Program • Revitalization of MBA & FLRA Routines • Implementation Contractor Management Program • Key Focus Areas: Energy Isolation, Confined Space, Contractor Management, Silica Control Next Steps: Supervisor Leadership Development
Slide 40: Social Performance
SOCIAL PERFORMANCE Côté in the Community Côté Gold's Community Benefits program supports sustainable development of the following host communities: • Indigenous Partner Communities • City of Greater Sudbury • City of Timmins • Community of Gogama • Mesomikenda Cottagers Two Impact Benefit Agreements
Slide 41: Fish Habitat Offsetting
FISH HABITAT OFFSETTING August 2009 May 2011 June 2024 Now
Slide 42: Monitoring Overview
MONITORING OVERVIEW Water Quality Monitoring • Surface Water Monitoring – 30 stations • Lake Monitoring - 21 lake profiles • Groundwater Monitoring - 75 wells • Hydrometric Monitoring - 24 stations • Potential Acid Generating (PAG) Cell Monitoring - 6 stations • Compliance and Due Diligence Monitori
Slide 43: Site Tour Agenda
SITE TOUR AGENDA TIME EVENT 05:15 Bus departure – boxed breakfast on the bus 08:00 Arrival at Côté, PPE pick-up, safety induction at PCC Tour AHS Control Centre TMF 08:45 – Pit Lookout & Mining Ops Processing Plant 12:00 Truck Shop 12:00 Remove PPE 12:30 Lunch at Main Camp 13:30 Exploration & Co
Slide 44: Exploration
EXPLORATION
Slide 45: Côté District - Regional Land Holding Tenures
Côté District - Regional Land Holding Tenures Summary Mineral potential Potential for Côté-style tonalite & diorite hosted Breccia zones (Clam Lake ext. & Gosselin-Jack Rabbit ext.) North TMF Option North TMF Exploration Potential for Syenite intrusion or shear Expansion zone hosted gold zones – Mos
Slide 46: Chester Central Area – Exploration Potential
Chester Central Area – Exploration Potential North TMF Option TMF + Exp N MRA Exp. E MRA Exp. S Exploration Target Areas Potential for Côté-style tonalite & diorite hosted Breccia zones: Targets of 1st Priority - Major Gold Trend - Best potential in Côté-Gosselin Trend and Clam Lake ext. & Gosselin-
Slide 47: Gosselin Deposit ~8 Years Ago
GOSSELIN DEPOSIT ~8 YEARS AGO From the May 31st 2018, exploration weekly report 2018 • CD18-024 returned a broad 231 m of 0.62 g/t Au, indicating persistent low-grade mineralization at depth. • The intersection lies ~330m below the Young-Shannon trend, suggesting a deeper, continuous gold system. •
Slide 48: Chester Regional Exploration - Structural Corridor Theory
CHESTER REGIONAL EXPLORATION - STRUCTURAL CORRIDOR THEORY Hydrothermal breccia Jack Rabbit Diorite breccia Silica +/- albite alteration Gosselin Deposit Côté Gold Clam Lake 1. Footnote 2. Footnote 2 48 48
Slide 49: Long Section – Looking South
49 LONG SECTION – LOOKING SOUTH JACK RABBIT GOSSELIN CÔTÉ GOLD Zone No. 2 Zone No. 1 Zone No. 3 390 250 TARGET AREA Previous Diamond Drilling o Tightly clustered o Depth of testing mostly above 250m vertical o Narrow corridors of testing (<200m wide) along strike from structurally hosted high-grade
Slide 50: Priority 2026 - Change of Focus
5 Priority 2026 - Change of Focus Priority focus now outside of the mine leases Swayze (TAAC) West Move to underexplored areas of UJV property Prospective Au occurrences / depositional settings North Shore Jerome North TMF Option Jack Rabbit Watershed TMF + Exp N MRA Exp. MRA E Exp. S Expansion and
Slide 51: Swayze West Regional Exploration – Jérôme Deposit
51 SWAYZE WEST REGIONAL EXPLORATION – JÉRÔME DEPOSIT • Jérôme Au – Ag Deposit hosted in veins along structural Temiskaming Sediments / Porphyry contact on 25 km strike porphyry / sediment contact • Milled grade 5.82 g/t Au (56,878 oz and 1.55 g/t Ag). Au – Ag – Mo association. • Deposit Model : Youn
Slide 52: Appendix
IAMGOLD | Ese.
Slide 53: Gold Mineral Reserves – 100% Basis
1,2,3 GOLD MINERAL RESERVES – 100% BASIS As of December 31, 2025 PROVEN PROBABLE P+P MINERAL RESERVES Tonnes Grade Ounces Tonnes Grade Ounces Tonnes Grade Ounces DEPOSIT Type* Location Ownership (000’s) (g/t) (000’s) (000’s) (g/t) (000’s) (000’s) (g/t) (000’s) Côté Gold3 OP Canada 70% 116,055 1.05 3
Slide 54: Gold Mineral Resources – 100% Basis
1,2,3,4,5 GOLD MINERAL RESOURCES – 100% BASIS MEASURED INDICATED MEASURED + INDICATED INFERRED Location Ownership Tonnes Grade Ounces Tonnes Grade Ounces Tonnes Grade Ounces Tonnes Grade Ounces DEPOSIT Type* (000’s) (g/t) (000’s) (000’s) (g/t) (000’s) (000’s) (g/t) (000’s) (000’s) (g/t) (000’s) Côté
Slide 55: Notes
NOTES MINING. 58 L[AMGOLD | FESR Sine.
Slide 56: Graeme Jennings, VP, Business Development & IR
GRAEME JENNINGS VP, BUSINESS DEVELOPMENT & IR 416 -388 -6883 TSX: IMG | NYSE: IAG | www.iamgold.com