Iamgold Corporation · TSX:IMG

Iamgold — Technical Presentation (October 2021)

80 slides from Iamgold's technical presentation, Oct 19, 2021

  1. Slide 1: Côté Gold – Site Tour

    CÔTÉ GOLD SITE TOUR – OCTOBER 2021 Plant construction at the Côté Gold Project, Canada Côté Gold – Site Tour October 19, 2021 TSX: IMG l NYSE: IAG www.iamgold.com

  2. Slide 2: Cautionary Statement

    CÔTÉ GOLD SITE TOUR – OCTOBER 2021 Cautionary Statement CAUTIONARY STATEMENT REGARDING FORWARD-LOOKING INFORMATION All information included in this presentation, including any information as to the Company’s future financial or operating performance and other statements that express management’s exp

  3. Slide 3: Technical Information and Qualified Persons

    CÔTÉ GOLD SITE TOUR – OCTOBER 2021 Technical Information and Qualified Persons QUALIFIED PERSON AND TECHNICAL INFORMATION The technical and scientific information relating to exploration activities disclosed in this document was prepared under the supervision of and verified and reviewed by Craig Ma

  4. Slide 4: Site Tour Agenda

    Site Tour Agenda 1. Project Overview 2. Construction Progress Update 3. Mining 4. Processing / TMF / Stockpiles 5. Operational Readiness 6. Community Relations & ESG 7. Project Capital & Operating Costs 8. Exploration District Upside 9. Appendix Côté Gold | An IAMGOLD mine 4

  5. Slide 5: Project Overview

    Project Overview Côté Gold | An IAMGOLD mine 5

  6. Slide 6: Côté Gold – Transformational Tier I Gold Project

    CÔTÉ GOLD SITE TOUR – OCTOBER 2021 Côté Gold – Transformational Tier I Gold Project CONSTRUCTION ON-TRACK Project 36% complete; Detailed engineering above 85%; On track for H2 2023 production Surpassed 2.9 million hours and 1,100+ days LTI free; focus on critical path areas and COVID-19 management F

  7. Slide 7: Regional Setting & Infrastructure

    CÔTÉ GOLD SITE TOUR – OCTOBER 2021 Regional Setting & Infrastructure Ownership & Location • Ownership: 92.5% JV (70:30 IAMGOLD/SMM); 7.5% 3rd party • Located approximately 20 km southwest of Gogama, Ontario • 6 km west of Highway 144 • 125 km southwest of Timmins, and 175 km North of Sudbury • Acces

  8. Slide 8: Project History

    CÔTÉ GOLD SITE TOUR – OCTOBER 2021 Project History Announced decision to construct (Jul) Completed Feasibility Study PTTW Const. Dewatering (Aug) IAMGOLD acquired Trelawney envisioning an 18 year mine life ECA Air and Noise received (Sept) Mining & Exploration Received final $95 million Construction

  9. Slide 9: Côté District – Mineral Reserves and Resources (100% Basis)

    CÔTÉ GOLD SITE TOUR – OCTOBER 2021 Côté District – Mineral Reserves and Resources (100% Basis) increase in total resources of the Côté deposit of Côté M&I resources Côté District – Mineral Reserves & Resources (2021)2 2.8x 73% 71% since acquisition classified as M&I resources converted to P&P reserv

  10. Slide 10: Key Project Metrics

    CÔTÉ GOLD SITE TOUR – OCTOBER 2021 Key Project Metrics PROJECT STATUS1 PROJECT COSTS1,4 EMERGING GOLD DISTRICT2 ~36% overall project completion $265M expended (from Jul ’20 to Oct ‘21) 7.2 Moz P&P | 13.6 Moz M&I ~85% detailed engineering complete $860-910M remaining (from Oct ‘21) >540km2 exploratio

  11. Slide 11: Côté Gold – Experienced Senior Project Team

    CÔTÉ GOLD SITE TOUR – OCTOBER 2021 Côté Gold – Experienced Senior Project Team Philippe (Phil) Gaultier Luc-Bernard Denoncourt Sylvain Collard Vice President, Project Manager, General Manager, Development Projects Côté Gold Côté Gold Phil oversees IAMGOLD’s development projects, Luc has been in char

  12. Slide 12: Site Layout and Tour Route

    CÔTÉ GOLD SITE TOUR – OCTOBER 2021 Site Layout and Tour Route Côté Gold Tour Points of Interest 1.1 Processing Plant 2.2 Tailings Management Facility 3.3 Open Pit 4.4 Exploration A virtual 360° tour of the Côté site is accessible here Côté Gold | An IAMGOLD mine 12

  13. Slide 13: Construction Progress Update

    Construction Progress Update Luc-Bernard Denoncourt, Project Manager, Côté Gold Philippe (Phil) Gaultier, Vice President, Development Projects Côté Gold | An IAMGOLD mine 13

  14. Slide 14: Construction on Schedule: Q3 2021 Update

    CÔTÉ GOLD SITE TOUR – OCTOBER 2021 Construction on Schedule: Q3 2021 Update1 ~36% ~85% $265M $860 – $910M project completion detailed engineering expended (July 2020+) remaining costs estimate2 Activities Summary • Earthworks activities advanced, including ongoing haul roads construction, water real

  15. Slide 15: Project Timeline – Key Milestones

    CÔTÉ GOLD SITE TOUR – OCTOBER 2021 Project Timeline – Key Milestones 2020 2021 2022 2023 2024 Q3 Q4 Q1 Q2 Q3 Q4 Q1 Q2 Q3 Q4 Q1 Q2 Q3 Q4 Q1 Q2 Q3 Q4 Project Completion ~36% Project Costs1 $265M $150M $590 – $620M $120 – $140M Remaining Estimated Allocation of Total Expenditures PROJECT TIMELINE Const

  16. Slide 16: Construction Update

    CÔTÉ GOLD SITE TOUR – OCTOBER 2021 Construction Update Eagle Lodge / Installation complete. Permanent camp commissioning at 95% (>800 workers at site). Camp WRC1: Bypass construction completed; Permanent channel 98% completed. Water Realignment WRC2: Bypass construction completed; Permanent channel

  17. Slide 17: Processing Plant

    CÔTÉ GOLD SITE TOUR – OCTOBER 2021 Processing Plant • Concrete cast in place and pre-cast progress: • Process plant building foundations are mostly complete • Vertimill foundations complete • Ball mill - one pour remaining • Primary crusher foundation is progressing with the first lift complete Stat

  18. Slide 18: Dams / Fish Relocation

    CÔTÉ GOLD SITE TOUR – OCTOBER 2021 Dams / Fish Relocation Dams Construction Status: 6 dams required for pit isolation CÔTÉ LAKE DAM and new lake creation • Clam Lake dam #1: Completed CLAM LAKE DAM 2 CÔTÉ LAKE • Clam Lake dam #2: Substantially completed • Calm Lake dam #3: To be constructed in 2022

  19. Slide 19: Financial Position

    CÔTÉ GOLD SITE TOUR – OCTOBER 2021 Financial Position Hedging Program1 + Operating cash flow • Côté’s project costs primarily incurred in CAD: from existing mines • 100% of exposure hedged in Q4 2021 between 1.28-1.47 (cash and hedges) • Hedged 75% and 48% in 2022 and 2023, respectively, between 1.3

  20. Slide 20: Site Infrastructure – Construction Progress

    CÔTÉ GOLD SITE TOUR – OCTOBER 2021 Site Infrastructure – Construction Progress PLANT SITE FOUNDATIONS CLAM LAKE DAM CONCRETE FORM WORK TEMPORARY POND & SUPPORT BUILDINGS PADS CAMP SITE Côté Gold | An IAMGOLD mine 20

  21. Slide 21: Mining

    Mining Mathew Wilson, Mine Manager, Côté Gold Côté Gold | An IAMGOLD mine 21

  22. Slide 22: Mine Design & Reserves

    CÔTÉ GOLD SITE TOUR – OCTOBER 2021 Mine Design & Reserves1 End of Y2 End of Y8 End of Y15 • Mine Design optimised since FS but no major changes • No material change to reserves since FS Reserve Ounces Ex-pit by Classification Tonnes Grade Contained Au 900,000 Classification 800,000 (Mt) (g/t Au) (00

  23. Slide 23: Updated Production Profile

    CÔTÉ GOLD SITE TOUR – OCTOBER 2021 Updated Production Profile Mining more than processed in early years • Mining capacity ~70mtpa ex-pit • Significant stockpile build in early years, direct feeding HG and drawing from S/P when required • Final 2 years of mill feed from LG stockpile reclaim Rehandled

  24. Slide 24: Mining Unit Costs – in line with benchmarks

    CÔTÉ GOLD SITE TOUR – OCTOBER 2021 Mining Unit Costs – in line with benchmarks From 2018 FS to Project Approval (July 2020), unit Mining Unit Cost Reconciliation mining costs increased to $2.20/t (from $2.07/t) Mining Unit US$/t ex-pit • Adjusted downtime for autonomous equipment, offset by using sh

  25. Slide 25: Changes/Optimisations to LOM (since FS)

    CÔTÉ GOLD SITE TOUR – OCTOBER 2021 Changes/Optimisations to LOM (since FS) De-risking ramp up and early operations: End of Period Reserve Blocks: High Grade (Yellow), Low Grade (Pink) • Mine phases re-designed to target HG material in 1st 3 years • Revised shovel productivity to match (non- autonomo

  26. Slide 26: Production Profile

    CÔTÉ GOLD SITE TOUR – OCTOBER 2021 Production Profile Phase design and mining schedule allows for HG plant feed earlier in Mine Life 700 1.60 Expected Recovered Gold Ounces and Average Feed Grade* 1.43 1.50 1.40 1.37 1.40 600 1.31 553 1.30 543 532 1.18 MINING ENDS 1.15 1.14 508 1.20 500 1.09 1.09 45

  27. Slide 27: 1st Ore Blast on 3rd October

    CÔTÉ GOLD SITE TOUR – OCTOBER 2021 1st Ore Blast on 3rd October Blast taken on 3rd October sits on top of reserve blocks (see picture showing reserve blocks at 382m and blast polygon of blast taken above • Reserve extends up to the 388m elevation, blast was taken down to the 388m level, just above t

  28. Slide 28: Mine Equipment

    CÔTÉ GOLD SITE TOUR – OCTOBER 2021 Mine Equipment Hauling & Loading Drills • 2 x CAT 6060FSE Shovel • 6 x EPIROC Pit Viper 231 • 3 x CAT 994K FEL • 2 x EPIROC D65 Smartroc • 23 x CAT 793F CMD Truck • 1 x CAT 349F Excavator • 6 x CAT D10 Dozer Services • 2 x CAT 844 Rubber Tire Dozer • 2 x CAT 777 Wa

  29. Slide 29: Autonomous Mining Truck (CAT 793F CMD)

    CÔTÉ GOLD SITE TOUR – OCTOBER 2021 Autonomous Mining Truck (CAT 793F CMD) Base 793F and 793F Full Command upgrade CMD 4 1 Autonomy cabinet • All Côté haul trucks 2 Mode indicator lights are Command-ready 2 5 from factory 3 Communication system • Full command upgrade 1 3 4 High precision GPS package

  30. Slide 30: Autonomous Drills (Epiroc PV-231)

    CÔTÉ GOLD SITE TOUR – OCTOBER 2021 Autonomous Drills (Epiroc PV-231) PV-231 ADS layers and associated hardware All Côté PV-231 drills are ADS ready from factory Three layers to enable ADS 1 3 4 2 5 11 • Operator Assist •1 Wifi •2 GPS Antenna • Remote Operations •3 Pan-Tilt-Zoom Camera •4 D515 I/O Mo

  31. Slide 31: Processing Plant, TMF, Stockpiles

    Processing Plant, TMF, Stockpiles Hugues Bergeron, Construction Manager, Côté Gold Simon Beaulieu, Construction Manager, Côté Gold Côté Gold | An IAMGOLD mine 31

  32. Slide 32: Process Plant Design

    CÔTÉ GOLD SITE TOUR – OCTOBER 2021 Process Plant Design Processing Plant • Availability 94% • 36,000 tpd rock processing capacity • Plant ramp-up period – 10 months to designed throughput • Secondary crusher P80 = 38 mm • HPGR P80 = 2.4 mm • Two stage grinding (Ball mill & Vertical mill), target fin

  33. Slide 33: Mill Equipment

    CÔTÉ GOLD SITE TOUR – OCTOBER 2021 Mill Equipment 1 x Primary Crusher – FLSmidth – 2 x VTM – Metso – VTM-4500-C 1 x Secondary Crusher – 8 x CIP Tanks – Modular - 8.15 dia. Gyratory Crusher 1,400 x 2,100 (room for a 3rd one) Metso – Cone Crusher MP1250 X 11.54 h (450 m3) agitators are (room for a 2nd

  34. Slide 34: Processing Capacity Expansion Potential

    CÔTÉ GOLD SITE TOUR – OCTOBER 2021 Processing Capacity Expansion Potential Current layout allows enough room to increase the plant throughput from 36 ktpd to 42 ktpd 3RD VERTI MILL FEED BIN SPARE SECONDARY 2ND SECONDARY CYCLONE FEED PUMP CRUSHER 2 LEACH TANKS SPARE PRIMARY FEEDER CYCLONE FEED PUMP C

  35. Slide 35: Tailings Management Facility (TMF)

    CÔTÉ GOLD SITE TOUR – OCTOBER 2021 Tailings Management Facility (TMF) TMF Design • Mine rock for dam construction, ~70 m CAMP high • 203 Mt tailings (233 Mt design requires TMF PROCESS +5 m raise) • Emergency spillways PLANT POLISHING STOCKPILES • Tailings Design has evolved since • Vegetation cover

  36. Slide 36: Starter Facility vs. Ultimate Design

    CÔTÉ GOLD SITE TOUR – OCTOBER 2021 Starter Facility vs. Ultimate Design Starter Facility Capacity 11.01 Mt Pond Volume 1.6 Mm3 Max Dam Height ~28m East Dam, ~19m West Dam Pond Elevation 404.7 Crest Elevation East Dam: 409m / West Dam: 412m Spillway East Side • East starter dam (phase 1 and 2) & west

  37. Slide 37: TMF Construction

    CÔTÉ GOLD SITE TOUR – OCTOBER 2021 TMF Construction TMF Construction Legend 3 1 SCP West Dam 2 West Starter Dam 4 5 9 3 Emergency Spillway 4 East Starter Dam 8 5 SCP East Dam 6 Saddle Dyke #1 2 7 Saddle Dyke #2 1 8 Cofferdam 10 9 Unnamed Creek Cofferdam 6 7 10 Starter Seepage Collection System Côté

  38. Slide 38: Operational Readiness

    Operational Readiness Sylvain Collard, General Manager, Côté Gold Côté Gold | An IAMGOLD mine 38

  39. Slide 39: Operations Readiness

    CÔTÉ GOLD SITE TOUR – OCTOBER 2021 Operations Readiness The role of operational readiness: Team Quick Facts: • Operational Readiness (O.R.) is about ensuring that people, systems and business processes are in place to facilitate smooth operational execution 16 Colleagues • While Plant Pre-Commission

  40. Slide 40: Action Plan: 2021-2023

    CÔTÉ GOLD SITE TOUR – OCTOBER 2021 Action Plan: 2021-2023 2021 2022 2023 Human resources Organization structure and 100 IMG Workers 150 IMG Workers 350+ IMG Workers hiring strategy H&S - Training SOP’S & training programs Contracts to be Contracts awarded to be awarded Supply Chain MARC / TSSA contr

  41. Slide 41: Action Plan: 2021-2023

    CÔTÉ GOLD SITE TOUR – OCTOBER 2021 Action Plan: 2021-2023 2021 2023 2021 2022 2023 2024 From 39 to 240 Total Workforce 24 to 56 Mine Project Phase 3 to 20 Mill 12 to 36 G&A 0 to 128 Contractor 240 to 350 Workforce Ramp Up 56 to 109 Mine Pre-Commissioning 20 to 71 Mill 36 to 42 G&A 128 to 128 Contrac

  42. Slide 42: Talent Acquisition Strategy

    CÔTÉ GOLD SITE TOUR – OCTOBER 2021 Talent Acquisition Strategy Attract Me Getting Noticed Integrated Planning Technology Perks Diversity, Equity and Inclusion Côté Gold | An IAMGOLD mine 42

  43. Slide 43: Detailed Planning Advanced for Autonomous Operations

    CÔTÉ GOLD SITE TOUR – OCTOBER 2021 Detailed Planning Advanced for Autonomous Operations • Work has accelerated with CAT and Toromont on AHS (as it is deploying 6 months ahead of ADS). • Design optimisation well advanced for mine and infrastructure to enable efficient AHS operations (crusher areas, r

  44. Slide 44: Owner Mining Equipment and Autonomy Readiness

    CÔTÉ GOLD SITE TOUR – OCTOBER 2021 Owner Mining Equipment and Autonomy Readiness • Ordered HME (from both CAT and Epiroc) Equipment Ordered To Date Units Vendor Ordered CAT 793F Autonomous Haul Truck 14 Toromont • Technology agreements with CAT, Toromont and CAT 6060 AC Electric Shovel 1 Toromont Ep

  45. Slide 45: Mine Operations Readiness

    CÔTÉ GOLD SITE TOUR – OCTOBER 2021 Mine Operations Readiness Advanced Operations Readiness Status • Mine tech services team, tools and basic processes in place for contractor mining (mine planning, geology & surveying) • Grade control process established with blasthole sampling, offsite assaying & b

  46. Slide 46: Community Relations and ESG

    COMMUNITY Community Relations and ESG Mike Garbutt, Deputy General Manager, Côté Gold Krista Maydew, Director, Community Relations Côté Gold | An IAMGOLD mine 46

  47. Slide 47: Health and Safety: Three million hours LTI free in Three Years

    CÔTÉ GOLD SITE TOUR – OCTOBER 2021 Health and Safety: Three million hours LTI free in Three Years Project-to-date has had exceptional safety performance. Côté Gold is continuing to protect its workforce through • 2,900,000+ effort hours and 1,100 days since project start up. strictly enforced COVID-

  48. Slide 48: Permitting Update

    CÔTÉ GOLD SITE TOUR – OCTOBER 2021 Permitting Update 2021 2022 2023 Sep 15 Lakes and Rivers Improvement Act (LRIA) – Permit extension – TMF Starter Dam - DONE Upcoming Nov 1 ECA Operations Phase and Permit to Take Water (PTTW) for open pit dewatering Permits Q4 2021 Transmission Line (Land use Permi

  49. Slide 49: Community Relations

    CÔTÉ GOLD SITE TOUR – OCTOBER 2021 Community Relations • Located on Treaty 9 Territory on the traditional lands of Mattagami First Nation and Flying Post First Nation and on the traditional harvesting area of the Métis Nation of Ontario, Region 3 • IAMGOLD and our partner Sumitomo are signatories to

  50. Slide 50: Employment Impact

    CÔTÉ GOLD SITE TOUR – OCTOBER 2021 Employment Impact Current Construction Operations 1,449 On and off site 375 IAMGOLD operations team (average) (full-time and part-time) 250 Contractor operations workforce (estimated) 15% Indigenous workforce goal of >25% Indigenous workforce 35% local and regional

  51. Slide 51: Site Water Monitoring

    CÔTÉ GOLD SITE TOUR – OCTOBER 2021 Site Water Monitoring Receiving waters monitoring programs: • 21 Groundwater monitoring locations • 13 Hydrology monitoring locations Additionally we monitor: • Sediment quality and benthic invertebrate community • Mercury (water, sediment, and fish tissue) 48 Surf

  52. Slide 52: Progress on Offsetting Habitat Areas

    CÔTÉ GOLD SITE TOUR – OCTOBER 2021 Progress on Offsetting Habitat Areas Côté Gold | An IAMGOLD mine 52

  53. Slide 53: IAMGOLD – Net Negative GHG Initiative 2050

    CÔTÉ GOLD SITE TOUR – OCTOBER 2021 IAMGOLD – Net Negative GHG Initiative 2050 Two IAMGOLD Global Targets 1. Reductions in Scope 1 (direct) and Scope 2 (indirect - energy) GHG emissions • Committed to reduce emissions profile to as close to zero as possible by no later than 2050 • Scope 3 emission co

  54. Slide 54: Project Capital and Operating Costs

    Project Capital and Operating Costs Philippe (Phil) Gaultier, Vice President, Development Projects Sylvain Collard, General Manager, Côté Gold Côté Gold | An IAMGOLD mine 54

  55. Slide 55: Capital Review

    CÔTÉ GOLD SITE TOUR – OCTOBER 2021 Capital Review • Pressure on commodities have been prevalent since the beginning of 2021 (ref: FRED*) • Since last 43-101, Nov 2018 publication to July 2021: • Structural steel prices – 23% increase • Carbon steel piping and mechanical bulks – 29% increase Structur

  56. Slide 56: Benchmarking

    CÔTÉ GOLD SITE TOUR – OCTOBER 2021 Benchmarking1 Recent projects were compared using actual quantities or latest estimate (depending on project) over the past years • Costs are supply and install blended from all contracts on the projects compared • Not all projects are in the same year – no inflati

  57. Slide 57: Capital Cost – 43-101

    CÔTÉ GOLD SITE TOUR – OCTOBER 2021 Capital Cost – 43-101 • Since project approval July 2020 the increase in capital cost is Project Scope (June 30, 2021) Initial Capital USD $ primarily attributable to: Owner costs 200 M Geology 5M • Growth in quantities: Mining 265 M • Structural steel, piping and

  58. Slide 58: Mining and Processing Costs per tonne

    CÔTÉ GOLD SITE TOUR – OCTOBER 2021 Mining and Processing Costs per tonne Diesel price 15% First 7 Years Years 8 – 17 assumption: Other 21% Labour $0.89/litre 7% Contractor Mining Cost $1.94 $2.56 $2.27* Cost 2023 – 2029 2030 – 2039 LOM Avg. Breakdown (per tonne mined) 20% Maintenance 37% * Including

  59. Slide 59: Capital Expenditures Over LOM

    CÔTÉ GOLD SITE TOUR – OCTOBER 2021 Capital Expenditures Over LOM 200 CWS NONS 150 $ Millions Lease payments Expansion 100 Capex 50 - 2022 2023 2024 2025 2026 2027 2028 2029 2030 2031 2032 2033 2034 2035 2036 2037 2038 2039 2040 2041 2042 200 G&A Milling Other TMF equipment Mining capital infrastruct

  60. Slide 60: Benchmark Mines & Projects

    CÔTÉ GOLD SITE TOUR – OCTOBER 2021 Benchmark Mines & Projects Canadian Malartic (Yamana / Agnico) Detour Lake (Kirkland Lake Gold) Rainy River (New Gold) Mining Life • Pit life through 2028 Mining Life • Pit life through 2038 Mining Life • Pit life through 2025 • UG development underway Mining Rate

  61. Slide 61: Mining/Processing Costs – Estimated Differences at Côté

    CÔTÉ GOLD SITE TOUR – OCTOBER 2021 Mining/Processing Costs – Estimated Differences at Côté Mining Cost Per Tonne (US$/t) Autonomous Fleet • Major cost impacts are labour and fleet efficiency Rainy River ('21-'24) $2.84 (fewer trucks) Greenstone ('31-'35) $2.26 • Preliminary estimate +/- $0.20 per to

  62. Slide 62: Other Project Metrics

    CÔTÉ GOLD SITE TOUR – OCTOBER 2021 Other Project Metrics Annual G&A Cost – US$ million1 Power Costs $3.00 0.100 US$/tonne • All facilities plan to use (are $2.50 Mwh/tonne Rainy River ('21-'24) $30 0.080 using) between 0.61-0.65 MWh/tonne processed $2.00 Greenstone $23 USD / tonne • MWh / tonne 0.06

  63. Slide 63: All-in Sustaining Costs

    CÔTÉ GOLD SITE TOUR – OCTOBER 2021 All-in Sustaining Costs AISC Comparison (US$/oz)1 $1,800 $1,600 Côté’s long-term AISC averages $881/oz RAINY RIVER 2028+, in line with peers $1,400 AISC ($USD/oz) $1,200 DETOUR $1,000 MAGINO DETOUR CÔTÉ $800 GOLD CANADIAN MALARTIC $600 LOW AISC due to lowest SR (1.

  64. Slide 64: Exploration District Upside

    Exploration District Upside Alan Smith, District Manager, Exploration, Côté Gold Côté Gold | An IAMGOLD mine 64

  65. Slide 65: Côté Gold Geological Setting

    CÔTÉ GOLD SITE TOUR – OCTOBER 2021 Côté Gold Geological Setting • Property: >500km2 located along South-Western extension of the prolific Abitibi Belt • Swayze GSB cut by the regionally extensive Rideout Deformation Zone • History: Numerous high-grade vein and shear zone hosted deposits / prospects

  66. Slide 66: Exploration Objectives

    CÔTÉ GOLD SITE TOUR – OCTOBER 2021 Exploration Objectives 2021 Objectives: • In-fill drilling of Gosselin at 70 m spacing supporting an initial resource estimate • Diamond drilling: JR • 2 land-based drill rigs Côté Deposit • 1 barge mounted rig Hava • Update geology model / vein model Clam • Contin

  67. Slide 67: Discovery – Côté Deposit Learnings

    CÔTÉ GOLD SITE TOUR – OCTOBER 2021 Discovery – Côté Deposit Learnings Construction of geological model by Exploration team after a full re-log of the deposit, with photo-re-logging to eliminate logging bias Côté Deposit PlanView Côté inclined view Côté Gold | An IAMGOLD mine 67

  68. Slide 68: Gosselin Geology Model

    CÔTÉ GOLD SITE TOUR – OCTOBER 2021 Gosselin Geology Model A Section Looking SW B Hydrothermal breccia Tonalite II Diorite Diorite breccia Côté Gold | An IAMGOLD mine 68

  69. Slide 69: 2021 Gosselin Drill Holes (assays up to August 11, 2021)

    CÔTÉ GOLD SITE TOUR – OCTOBER 2021 2021 Gosselin Drill Holes (assays up to August 11, 2021) Côté Gold | An IAMGOLD mine 69

  70. Slide 70: Assay Highlights: Hydrothermal Breccia (GOS21-81)

    CÔTÉ GOLD SITE TOUR – OCTOBER 2021 Assay Highlights: Hydrothermal Breccia (GOS21-81) 0.95 g/t / 430.5 m 1.57 g/t / 242 m 1.31 g/t / 2.31 g/t / 274.2 m 154 m 6.0 g/t 32.9 m Côté Gold | An IAMGOLD mine 70

  71. Slide 71: 2021 Gosselin Initial Resource Estimate – SLR Consulting

    CÔTÉ GOLD SITE TOUR – OCTOBER 2021 2021 Gosselin Initial Resource Estimate – SLR Consulting Block model and Estimation strategy similar to those used for Côté • ID3 Block Interpolation; Assay capping by Domain; Classification supported by continuity analysis (Variography) • Data base: 163 DDH’s tota

  72. Slide 72: Gosselin 2021 Initial Resource Estimate

    CÔTÉ GOLD SITE TOUR – OCTOBER 2021 Gosselin 2021 Initial Resource Estimate1 Tonnes Grade Contained Au Attributable Classification Contained Au (Mt) (g/t Au) (Moz) (Moz) Total Mineral Resources2 Indicated 124.5 0.84 3.35 2.17 Inferred 72.9 0.73 1.71 1.11 • 66% of the contained resource ounces classif

  73. Slide 73: Gosselin Expansion Potential

    CÔTÉ GOLD SITE TOUR – OCTOBER 2021 Gosselin Expansion Potential Drill spacing too wide to classify resources Open to NE Saddle Area Potential Pit depth limited by lack of drilling Côté Gold | An IAMGOLD mine 73

  74. Slide 74: Gosselin and Côté Resources

    CÔTÉ GOLD SITE TOUR – OCTOBER 2021 Gosselin and Côté Resources Côté Gold | An IAMGOLD mine 74

  75. Slide 75: Exploration District Potential – Au Corridor

    CÔTÉ GOLD SITE TOUR – OCTOBER 2021 Exploration District Potential – Au Corridor Jack Rabbit Target Clam Lake Target Côté Gold | An IAMGOLD mine 75

  76. Slide 76: Côté District – Exploration Opportunities

    CÔTÉ GOLD SITE TOUR – OCTOBER 2021 Côté District – Exploration Opportunities Côté-type (Breccia, Intrusion Related and Vein-related, bulk tonnage Chester-type late (or early) Orogenic vein systems, narrow vein, BH Shear and alteration zones at lithological contacts. Temiskaming-sed and porphyry-host

  77. Slide 77: Côté Gold – Transformational Tier I Gold Project

    CÔTÉ GOLD SITE TOUR – OCTOBER 2021 Côté Gold – Transformational Tier I Gold Project CONSTRUCTION ON-TRACK Project 36% complete; Detailed engineering above 85%; On track for H2 2023 production Surpassed 2.9 million hours and 1,100+ days LTI free; focus on critical path areas and COVID-19 management F

  78. Slide 78: Appendix

    Appendix Côté Gold | An IAMGOLD mine 78

  79. Slide 79: Conformance with Global Industry Standard for Tailings Managements (GISTM)

    CÔTÉ GOLD SITE TOUR – OCTOBER 2021 Conformance with Global Industry Standard for Tailings Managements (GISTM) • International Council on Mining and Metals (ICMM) # of Req’s # of Req’s # of Req’s in partnership with UN Environment and Principles Topic # of Req’s Met not Met N/A for Responsible Invest

  80. Slide 80: Philip Rabenok, Manager, Investor Relations

    CÔTÉ GOLD SITE TOUR – OCTOBER 2021 Philip Rabenok, Manager, Investor Relations 416-933-5783

IAMGOLD — Technical Presentation (October 2021) on 6ix