Slide 1: Corporate Presentation
CORPORATE PRESENTATION August 2026 TSX: IMG | NYSE: IAG | www.iamgold.com
Slide 2: Cautionary Statement
CAUTIONARY STATEMENT All information included or incorporated by reference in this MD&A, 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 impact,
Slide 3: Cautionary Statement
CAUTIONARY STATEMENT CAUTIONARY NOTE TO U .S . INVESTORS REGARDING DISCLOSURE OF MINERAL RESERVE AND MINERAL RESOURCE ESTIMATES Disclosure regarding the Company’s mineral properties, including with respect to mineral reserve and mineral resource estimates, included in this presentation, was prepared
Slide 4: Overview
OVERVIEW A LEADING, MODERN CANADIAN-FOCUSED MULTI-ASSET PRODUCER • Côté Gold: One of Canada’s largest open pit gold mines, a model for modern mining, with significant growth potential • Westwood: Quebec underground success story, generating positive cashflow with a revised technical approach to unde
Slide 5: 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 6: Responsible Mining
RESPONSIBLE MINING ENVIRONMENT HEALTH & SAFETY GOVERNANCE & COMMUNITY • A focus on biodiversity informed by • Total Recordable Injury Frequency Rate • Women hold 44% of Board seats and frameworks incl. Taskforce on Nature- improved to 0.60, extending a multi-year 40% of Executive Leadership Team rel
Slide 7: Q2 Operating Highlights
Q2 OPERATING HIGHLIGHTS OPERATING RESULTS RESPONSIBILITY Q2 2026 Q2 2025 YTD 2026 2026 Guidance • Q2 TRIFR of 0.70, with YTD TRIFR of 0.56 Côté Gold (attr.) koz 67.3 67.0 119.6 270 – 310 • Zero significant environmental incidents reported in Q2 Westwood (100%) koz 32.4 29.4 68.6 110 – 130 Essakane (
Slide 8: Financial Highlights
FINANCIAL HIGHLIGHTS Q2 FINANCIAL HIGHLIGHTS (In $ millions, unless otherwise stated) Q2 2026 Q2 2025 YTD 2026 CASH FLOW & BALANCE SHEET Revenues $856.9 $580.9 $1,887.0 • Mine-site free cash flow of $ 368.9M (up 163% y/y) | YTD: $893.5 M Gross profit $415.1 $198.8 $985.8 EBITDA 1 $495.3 $283.8 $1,15
Slide 9: Q2 Financial Highlights
Q2 FINANCIAL HIGHLIGHTS Q2 2026 CASH FLOW RECONCILIATION 01.4 M $5 Cash @ Mar 31, 2026 $550.2 : sh Operating activities Ca 4 5.7 M +$442.9 (before WC) Operating $1.35B Taxes paid -$72.4 TOTAL LIQUIDITY : $8 Δ W/C & stockpiles, ty +$74.6 ARO, etc va ili c A ila a ble C re d it F Capital expenditures
Slide 10: Côté Gold Mine
Ei ~A COTE-GOLD MINE
Slide 11: Côté Gold (70% Interest)
2026 (100% basis, unless otherwise stated) Q2 2026 Q2 2025 YTD 2026 CÔTÉ GOLD (70% Interest ) Ore mined kt 3,072 3,170 6,625 Guidance Grade mined g/t 0.86 0.95 0.93 Q2 OVERVIEW 11,736 11,808 21,062 Material mined – total kt ~48,000 • Production (70%): 67,300 oz | YTD: 119,600 oz Ore milled kt 2,873
Slide 12: Côté Gold (70% Interest)
CÔTÉ GOLD (70% Interest ) OUTLOOK Q2 COSTS Attr . YTD 2026 2026 Guidance • Cash costs1 (excluding royalties) of $1,245/oz, cash costs1 of $1,554/oz (100%) 170,900 390,000 – 440,000 & AISC1 of $2,082/oz in Q2 Production oz (70%) 119,600 270,000 – 310,000 • Mining costs averaged $4.49/t, further impro
Slide 13: Côté Expansion
CÔTÉ EXPANSION MINERAL RESERVE & RESOURCE ESTIMATE UPDATED MINE PLAN Tonnes Grade Ounces • Updated technical report and mine plan in Q4 2026 to outline (Resources effective Mar 31, 2026; Reserves effective Dec 31, (000’s) (g/t) (000’s) longer mine life and increased reserves at an increased capacity
Slide 14: Côté Gold Long Section
CÔTÉ GOLD LONG SECTION 1. M&I resources are inclusive of P&P Mineral Reserves, refer to Mineral Reserves and Resources Statement in Appendix. 14 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 cut-off grade of
Slide 15: Côté Gold: Large-Scale and Long-Life Mine
C Ô T É 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 4 390 340 18 300 280 240 230 13 215 12 8 6 6 5 4 3 1 3 Detour Lake Malartic Meadowbank Côté Gold
Slide 16: Westwood
__ WESTWOOD
Slide 17: Westwood Complex
2026 Q2 2026 Q2 2025 YTD 2026 WESTWOOD COMPLEX (100% basis, unless otherwise stated) Guidance Ore mined – UG kt 104 98 210 Ore mined – OP kt 109 315 169 Q2 OVERVIEW Ore milled kt 287 323 590 ~1,200 • Production of 32,400 oz | YTD: 68,600 oz Head grade – UG g/t 8.40 7.38 9.1 • Mine-site free cash flo
Slide 18: Westwood Complex
WESTWOOD COMPLEX COSTS OUTLOOK • Cash costs1 of $1,606/oz & AISC1 of $2,163/oz in Q2 YTD 2026 2026 Guidance • Underground mining costs were $314/t, reflecting increased Production oz 68,600 110,000 – 130,000 labour and maintenance activity Cash costs1 $/oz $1,417 $1,500 – $1,650 • Milling costs of $
Slide 19: Westwood Complex
WESTWOOD COMPLEX +4800 MINERAL RESERVE & RESOURCE ESTIMATE1 WEST CENTRAL EAST • P&P Mineral Reserve estimate (underground) of 1.1 million CORRIDOR CORRIDOR CORRIDOR ounces at 9.72 g/t, increasing +13% from YE2024 after depletion +4600 • Mineral Resource estimate of 2.4 million ounces, incl. Grand Du
Slide 20: Essakane
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Slide 21: Essakane
2026 (100% basis, unless otherwise stated) Q2 2026 Q2 2025 YTD 2026 Guidance ESSAKANE (90% interest prior to Q2 2025; 85% thereafter) Ore mined Mt 2.5 2.2 4.7 Material mined – total Mt 12.0 10.7 23.9 43 – 46 Q2 OVERVIEW Strip ratio w:o 3.8 4.0 4.1 3.0 – 4.0 • Production (attr .) of 88,400 oz | YTD:
Slide 22: Essakane
ESSAKANE (90% interest prior to Q2 2025; 85% thereafter) OUTLOOK COSTS • Cash costs1 (excl. royalties) of $1,214/oz, Cash costs1 of $1,724/oz & YTD 2026 2026 Guidance AISC1 of $2,201/oz in Q2 Production (attr .) oz 183,500 340,000 – 380,000 • Open pit mining costs of $4.79/t, benefiting from free di
Slide 23: Essakane
ESSAKANE CURRENT MINE PLAN1 • Current mine plan outlines a mine life to 2028 • Mining from three remaining pit phases in the Essakane Main Zone ("EMZ") pit, and the Lao and Gourouol satellite pits • Annual average gold production (100%) of approximately 400,300 oz • Updated technical report expected
Slide 24: Exploration
EXPLORATION
Slide 25: Nelligan Mining Complex
NELLIGAN MINING COMPLEX CREATING THE NEXT GREAT CANADIAN MINING CAMP • IAG completed acquisitions of Northern Superior and Orbec in Croteau Est 100%, Au December 20251 - exploration • Nelligan Mining Complex total combined Mineral Resources2,3: 4.3 Moz Indicated (0.99 g/t Au) and 7.5 Moz (1.08 g/t A
Slide 26: Nelligan Mining Complex
NELLIGAN MINING COMPLEX Nelligan Longitudinal Section NELLIGAN (100% INTEREST) • Located 45 kilometres southwest of Chibougamau, Québec • Updated resource estimate1(on 100% basis): Cut-off Category Grade Tonnage Grade Contained Au (g/t Au) (Mt) (g/t Au) (koz Au) Indicated 0.35 102.8 0.95 3,125 Infer
Slide 27: Nelligan Mining Complex
NELLIGAN MINING COMPLEX Philibert Aerial View of Mineralization PHILIBERT1 (100%)4 • Northern Superior resource estimate2(on 100% basis): Cut-off Category Grade Tonnage Grade Contained Au (g/t Au) (Mt) (g/t Au) (koz Au) Indicated 0.35 7.9 1.10 278.9 Inferred 0.35 48.5 1.10 1,708.8 • Mineralized stri
Slide 28: Appendix
IAMGOLD | Ese.
Slide 29: Côté Gold – Cost Categories
CÔTÉ GOLD – 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 Maint
Slide 30: Côté Gold – Reconciliation
CÔTÉ GOLD – RECONCILIATION 2025 Last 6-months F1 F1.5 F2 Factor Tonnes Grade Ounces Factor Tonnes Grade Ounces F1 -3% -5% -8% F1 -2% -7% -9% Reserves Final F1.5 6% -2% 5% F1.5 5% 0% 6% Production Mill Feed Model Design F2 -3% 6% 3% F2 -2% 8% 6% F3 F3 1% -1% -1% F3 1% 1% 2% EXCELLENT RECONCILIATION B
Slide 31: 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 Crusher Primary Crusher HPGR 31
Slide 32: 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 33: Côté Growth
CÔTÉ GROWTH VRIFY | Changing how mining communicates. GOSSELIN ZONE CÔTÉ ZONE 33
Slide 34: Gosselin Longitudinal Section
GOSSELIN LONGITUDINAL SECTION Gosselin Zone Côté Resource Gosselin Pit Resource Pit Côté Hydrothermal Hydrothermal Breccia Breccia (HdBx) (HdBx) Priority exploration target for Hydrothermal Breccia GOS23-136 240.0 m grading 1.53 g/t Au GOS23-139 Incl. 120.0 m grading 2.26 g/t Au 406.0 m grading 0.72
Slide 35: 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 35 35
Slide 36: Long Section – Looking South
36 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 37: Priority 2026 - Change of Focus
3 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 38: 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 39: 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 40: Graeme Jennings, VP Business Development & IR
GRAEME JENNINGS VP, BUSINESS DEVELOPMENT & IR 416 -388 -6883 TSX: IMG | NYSE: IAG | www.iamgold.com 40