Iamgold Corporation · TSX:IMG

Iamgold — Corporate Update (September 2017)

103 slides from Iamgold's corporate update, Sep 12, 2017

1. Slide 1: RGM Operations Presentations - Analysts & Investors Visit

   RGM OPERATIONS PRESENTATIONS ANALYSTS & INVESTORS VISIT ROSEBEL MINE Management Team Rosebel September 12th, 2017 TSX: IMG NYSE: IAG

2. Slide 2: Cautionary Statement

   Cautionary Cautionary Statement Statement 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 expectations or estimates of future performance, other than statements of h

3. Slide 3: Safety Briefing

   Safety Briefing Rosebel Mine Location  Evacuation procedure  Personal Protective Equipment  Sun and hydration  Awareness while on site  Medical facility Zero Harm 3

4. Slide 4: Agenda

   Agenda 1. General Overview Suresh Kalathil 2. Health & Safety Shalini Kesarsing 3. Environment, Community Relations Jerry Finisie 4. Corporate Affairs and Govt. Relations Sharmila Jadnanansing 5. Supply Chain Ritesh Agarwal 6. Life of Mine Michel Payeur/Remon van de Paal 7. Mine Operations Saran San

5. Slide 5: RGM Operations General Overview

   RGM Operations General Overview Suresh Kalathil General Manager September 12, 2017

6. Slide 6: Year of Transformation - 2017

   Year of Transformation - 2017 Priorities and initiatives for 2017 include:  Promote a culture of Safety and well being of our employees. 2017 has been branded as the ‘Year of the employee”  Promote Business Excellence culture and develop strong internal resources across site.  Develop various Min

7. Slide 7: RGM Vision

   RGM Vision Vision To be the lowest cost and best in class gold producing mine in the world Mission To safely achieve short-term plan & long-term vision by i. Continuously identifying short and long term opportunities ii. Achieve and sustain the identified Opportunities. 6

8. Slide 8: Key Performance Drivers

   Key performance Drivers  Zero Harm  Availability Defined Ownership  Safety  Efficiencies - OEE  Environment & CSR  Productivities  Production levels Operational  Optimization Excellence  Costs of production  Best practices  Cost reduction, disciplined capital allocation and Cash preservat

9. Slide 9: 2017 Business Optimization Key Drivers

   2017 Business Optimization Key Drivers Mill Operations strategy to reduce Cyanide & Grinding Media consumption Parts and Consumables Procurement end-to-end process review and improvement Enhanced Business Intelligence OPEX (BI) Systems Drilling & Blasting accuracy and productivity optimization Produ

10. Slide 10: Key Achievements - 2016

    Key Achievements - 2016  Highest tonnes mined on record (> 64 MT)  Highest tonnes Hard rock and Trans rock Milled on record  Lowest $ t/ mined in five years  Lowest G&A costs in five years  Lowest Sustaining Capital in five years  Results in:  AISC well below $1,000/oz, first time in four yea

11. Slide 11: Health, Safety & Risk

    RGM Operations Health, Safety & Risk Shalini Kesarsing Health & Safety Supdt. September 12, 2017

12. Slide 12: Health and Safety

    Health and Safety Risks and Challenges  Competencies, Certifications and Training  Emergency Readiness  SRCS implementation (i.e. related procedures)  Improving of EHS Management System  Safety Maturity (Behavior Based Safety a. Leading Indicators b. Lagging Indicators 3.50 % completed 120% 3.0

13. Slide 13: Achievements 2017

    Achievements 2017 Significant Risk Training & Skill Employee Emergency Management Development Engagement Readiness Fall Prevention, >7500 hours Supervisor Safety More mock Confined Space, (site wide) meetings exercises & drills LOTOV & Machine Safeguarding Work Floor Personal Presences & Emergency L

14. Slide 14: Some pictures

    Some pictures Fall Authorized Training Work floor presences with Mill employees Fire Awareness Training H&S Inspection Work floor presences with Mine employees Risk assessment during Mill shutdown 14

15. Slide 15: Environment

    RGM Operations Environment Jerry Finisie Sustainability Manager September 12, 2017

16. Slide 16: Strategy 2017

    Strategy 2017 •Re-certification new •Detailed 2017 Mine ISO 14001 – 2015 Closure Plan (MCP) Standard •Reclamation •Ensure Legal Research Compliance & Due Diligence SYSTEM CLOSURE MANAGEMENT: PLANNING: WATER EXPLORATION TREATMENT PROJECT: OPTIMIZATION: •ETP Treatability •Baseline studies Study and Se

17. Slide 17: Achievements 2017

    Achievements 2017 System Management: System Management: Legal Compliance & ISO 14001 - 2015 Due Diligence Gap Analysis between ISO 14001 – Environmental Baseline Assessment 2004 and ISO 14001 – 2015. Roma and East Tailings Road (ETR) pits. 3 Workshops for Managers, Superintendents, Coordinators, GF’

18. Slide 18: ISO 14001-2015 Workshops and Training

    ISO 14001-2015 Workshops and Training 18

19. Slide 19: Community Relations

    RGM Operations Community Relations Jerry Finisie Sustainability Manager September 12, 2017

20. Slide 20: Community Relations Social Responsibility Strategy

    Community Relations Social Responsibility Strategy Purpose Enriching the lives of stakeholders through investing in Sustainable development of communities Objective Supporting the business while maintaining the social license to operate Engagement Continuous building and maintaining sustainable rela

21. Slide 21: Highlights 2017 initiatives

    Highlights 2017 initiatives 22

22. Slide 22: Corporate Affairs & Government Relations

    RGM Operations Corporate Affairs & Government Relations Sharmila Jadnanansing Legal and Corporate Affairs Manager September 12, 2017

23. Slide 23: Government Engagement at the Highest Level

    Government Engagement at the Highest Level Aug. 2016: Saramacca deal Aug. 2015: Inauguration luncheon Aug 11, 2017: Meeting Presidential Palace – meeting July 2016 2013: Signing of Second Amendment 23

24. Slide 24: Rosebel's Contribution to Suriname

    Rosebel’s Contribution to Suriname Rep. of Sur. 5% shareholder: at the AGM represented by the Vice President and the Minister of Natural Resources 24

25. Slide 25: Direct Financial Contribution to the Republic of Suriname

    Direct Financial Contribution to the Republic of Suriname 2016 Direct Financial Contribution: $46 M Direct Financial Contribution 2009 - 2016 Income Tax/Stat. & Payroll Tax $167.4 M Cons. Fee 180 $165.1 M $/Millions Income Tax $8.8 M Royalties 160 12.6 M $136.9 M 140 Payroll Tax 120 $107.2 M $92.1 M

26. Slide 26: Local Content

    Local Content  Total spent in 2016: ~ $265 Suriname Suppliers vs. Non-Suriname million Suppliers 2005 - 2016  Suriname Suppliers: ~ $162 million ~ 250 $/Millions 61% 200  Non-Suriname Suppliers: $103 million ~ 38% 150  Local expenditures include 100 power costs 50  Power costs 2016: $24 million

27. Slide 27: Economic Value for Suriname: 2005 – 2016

    Economic Value for Suriname: 2005 – 2016 27

28. Slide 28: Supply Chain

    RGM Operations Supply Chain Procurement, Logistics, Warehouse Ritesh Agarwal Supply Chain Manager September 12, 2017

29. Slide 29: Supply Chain Strategy and Road Map

    Supply Chain Strategy and Road Map 2020 - Develop Best Skills - Adaptable to changes 2019 - Flexible (internal & - Develop Sustenance external changes) - TPM implementation - Deliver world-class results in cost reduction, - Revisit processes working capital mtg., and 2018 - Look for Innovations prod

30. Slide 30: Major Categories Sourcing Plan

    Major Categories Sourcing Plan • Renegotiated with existing service providers for food supplies, equipment hire, labor hire, security services and explosives supplies. • Tendered out for employee bussing services and introduced turnkey performance based contract with 25% better rates than existing.

31. Slide 31: 2017 LOM

    RGM Operations 2017 LOM $1200/Oz Gold Price Base Michel Payeur/Remon van de Paal Technical Services Manager /Finance Controller September 12, 2017

32. Slide 32: RGM Site Layout

    ooo0s 00sz95 707500 707500 it 705000 705000 702500 702500 700000 697500 695000 695000 692500 690000 690000 ono0zs oosz9s ooosas ooszas ~ =) fe) > © =! o = i?) = O aw

33. Slide 33: Mineral Resource Update

    Mineral Resource Update June 30th, 2017 Tonnage Grade Contained Metal Category (000 t) (g/t Au) (000 oz Au) Measured 31,402 0.7 676 Indicated 275,710 1.0 8,649 Total M&I 307,112 0.9 9,325 Inferred 84,866 1.0 2,667  Mineral Resources estimated at average cut-off grades between 0.19 g/t Au and 0.50 g

34. Slide 34: Resources Waterfall

    Resources Waterfall All pits MII – 100% basis 1,500 $/oz; Pit constrained 34

35. Slide 35: Resource Distribution

    Resource Distribution Pit & Material Types Resource Distribution per Material Type Resource Distribution per Pit 100% 35% 90% 30% 80% % MII Resources % MII Resources 70% 25% 60% 20% 50% 40% 15% 30% 10% 20% 10% 5% 0% 0% Saprolite Transition Hard Rock Material Types Measured & Indicated Resources Infe

36. Slide 36: 2016-2017 Model Updates

    2016-2017 Model Updates Models Type (Flag) Flag 5 => all the rest 36

37. Slide 37: Resource Models

    Resource Models Comparison – Overall Trends Previous estimates using ID3 underestimated tonnage, slightly overestimated grade and underestimate ounces New models using OCK-Luc globally show more tonnage, same grade and more ounces, which matches closer to historical reserve reconciliation Figure Mod

38. Slide 38: 2015-2016 Drilling

    2015-2016 Drilling – Included in 2017 Resource Update Main Targets Resources increased by 245 kt @ 0.8 g/t => 6 koz Resources increased by 500 kt @ 0.7 g/t => 13 koz Resources increased by 2.4 Mt @ 0.9 g/t => 68 koz Resources increased by 120 kt @ 0.67 g/t => 3 koz Resources increased by 11.0 Mt @ 1

39. Slide 39: 2017 Drilling Overview

    2017 Drilling Overview In Progress KoolHoven - Jzone SADDLE => 2,500m Jzone Central - East SADDLE => 3,200m PayCaro WEST SADDLES => 9,900m PayCaro EAST East Extension => 1,200m PayCaro Central - East SADDLE => 1,200m Rosebel – Rosebella Royal Hill SADDLE => 5,600m SADDLE => 4,000m 2015 drilling 2016

40. Slide 40: RGM Reserves Update

    RGM Reserves Update July 27th Disclosure September 2017 TSX: IMG NYSE: IAG

41. Slide 41: Mineral Reserve Update

    Mineral Reserve Update June 30th, 2017 Tonnage Grade Contained Metal Category (000 t) (g/t Au) (000 oz Au) Proven 24,356 0.7 516 Probable 90,544 1.1 3,215 Total 114,900 1.0 3,730  Mineral Reserves estimated at average cut-off grades between 0.16 g/t Au and 0.44 g/t Au  Mineral Reserves are estimat

42. Slide 42: Reserves Waterfall

    Reserves Waterfall All pits in production P&P – 100% basis 1,200 $/oz 42

43. Slide 43: Reserve Distribution

    Reserve Distribution Pit & Material Types Reserve Distribution per Material Reserve Distribution per Pit 3 500 1600 3 000 1400 Gold Ounces (koz) Gold Ounces (koz) 1200 2 500 1000 2 000 800 1 500 600 1 000 400 500 200 - 0 Saprolite Transition Hard Rock Material Type Pits 43

44. Slide 44: Mill Throughput

    Major Assumptions Mill Run Rates Material Recoveries Soft 96% Transition 94% Hard 93% Total Mill Throughput as a Function of Hard Rock Feed 14000000 12000000 Mill Throughput (tonnes) 10000000 8000000 6000000 4000000 2000000 0 55% 60% 65% 70% 75% 80% 85% 90% 95% 100% % Hard Rock 44

45. Slide 45: Mine Schedule Optimization

    Mine Schedule Optimization Shell Selection & Phasing Whittle pit optimization used to determine maximum net discounted cash flow Selection methods incorporate phasing into the ultimate pit shell selection to ensure maximum value – This technique is a departure from what was previously applied at RGM

46. Slide 46: Mine Schedule Optimization (Contd)

    Mine Schedule Optimization (Contd) Shell Selection & Phasing Apex of best case line selected – Not practically feasible but most optimized pit shell Apex of Phased case – Compromise of optimization and practicality 46

47. Slide 47: Multi-Pit Blending

    Multi-PitBlending Multi-Pit Blending – Money – Money Mining (Cont.) Mining  Detailed mine designs chosen from selected shells, with extensive use of pit phasing Pits LOM 2016 Phases LOM 2017 Phases Rosebel 2 7 Pay Caro 3 5 J-Zone 2 5 Royal Hill 1 3 Mayo 1 5 Roma West 1 1 Roma East 0 1 1 Koolhoven 1

48. Slide 48: Cut Off Grades

    Cut Off Grades The mine scheduling process applies variable CoG’s CoG’s are developed to allow the most optimal mill feed blend while taking into account location, time, material and mining and milling capacity LOM 2016 LOM 2017 Material CoG’s CoG’s* Soft 0.23 0.16 Transition 0.27 0.20 Hard 0.43 0.4

49. Slide 49: Cut Off Grade Trend - North Pits

    Cut Off Grade Trend North Pits Pay Caro J Zone Rosebel 49

50. Slide 50: Cut Off Grade Trend - South Pits

    Cut Off Grade Trend South Pits Mayo Royal Hill Roma East Roma West 50

51. Slide 51: Dilution, Mining Loss and Adjustment Factors

    Dilution, Mining Loss and Adjustment Factors Dilution factors of 8% in Saprolite and 10% in Transition and Rock applied Dilution estimated at zero grade Adjustment factor of 8% in Saprolite, 10% in Transition and Rock applied to tonnes Aligned with historical reconciliation No mining loss factor app

52. Slide 52: Material Mined by Rock Type

    Material Mined by Rock Type 52

53. Slide 53: Production by Pit

    Production by Pit Mined Material by Pit (kt) #1AMGOLD’ CORPORATION 2018 2019 2020 2021 2022 2023 2024 2025 2026 2027 2028 mRB mRME maMA @RH = RMW wJZ mPC

54. Slide 54: Mill Feed by Material Type & Ounce Production

    Mill Feed by Material Type & Ounce Production 54

55. Slide 55: Mill Feed by Pit

    Mill Feed by Pit 14,000 12,000 be S 8 [o) 7 8,000 6,000 Mill Feed by Pit (kt) 4,000 2,000 #1AMGOLD’ CORPORATION 2018 2019 2020 2021 2022 2023 2024 2025 2026 2027 2028 m Stockpiles mRB m@RME BMA @RH mRMW JZ mPC

56. Slide 56: Opportunities

    Opportunities Waste planning Further optimization of dump plans and schedules Mining costs optimized allocation VRA (Vertical Rate of Advancement) Focus: Dewatering, Blasting, Wall Control and Mining Quality. Further Life-of-fleet optimization and coordination with satellite pit integration 56

57. Slide 57: LOM 2017 Financials

    LOM 2017 Financials September 2017 TSX: IMG NYSE: IAG

58. Slide 58: LOM 2017 Financial Key Assumptions

    LOM 2017 Financial Key Assumptions Mining costs based on 2017 Budget costs (new CLA & SRD devaluation) EURORESSOURCES Royalty (IMG now has 90% participation) Regional Exploration, Corp Admin and Group Charges not considered ARO estimate for End of Mine disturbance End of Mine redundancy costs includ

59. Slide 59: Highlights

    Highlights  LOM 2017 = 3.7 Moz Reserve  Compared to like-for-like 2016 2.4 Moz Reserve  LOM 2017 weighted average total Cash cost = $ 707 / oz *  LOM 2017 weighted average total AISC = $ 923 / oz *  Koolhoven pit not included (2.5MT Hard Rock @ 1.3 g/t)  Overman was in (internal) LOM-2016, it

60. Slide 60: Rosebel's LOM vs. Gold Price Assumptions

    Rosebel’s Rosebel’sLOM* LOMvs. Gold * vs. Price Gold Assumptions Price Assumptions 2030 1450 2028 1400 2026 1350 LOM (Year Ending)* Gold Price (US$/oz) 2024 1300 2022 1250 2020 1200 2018 1150 2016 1100 Jan 15, Jun 15, Jan 15, June 15, Jan 15, June 15, Jan 15, June 15, 2014 2014 2015 2015 2016 2016 2

61. Slide 61: Tonnes Mined comparison

    Tonnes Mined comparison LOM 2014, LOM2016 (internal) and LOM 2017 Tonnes Mined (millions) 80 70 60 50 40 30 20 10 - 2018 2019 2020 2021 2022 2023 2024 2025 2026 2027 2028 LOM-2014 LOM-2016 (internal) LOM-2017 61

62. Slide 62: Tonnes Milled Comparison

    Tonnes Milled Comparison LOM 2014, LOM2016 (internal) and LOM 2017 Tonnes Milled (millions) 14 12 10 8 6 4 2 - 2018 2019 2020 2021 2022 2023 2024 2025 2026 2027 2028 LOM-2014 LOM-2016 (internal) LOM-2017 62

63. Slide 63: Ounces Produced comparison

    Ounces Produced comparison LOM 2014, LOM2016 (internal) and LOM 2017 Ounces produced (‘000) 400 350 300 250 200 150 100 50 - 2018 2019 2020 2021 2022 2023 2024 2025 2026 2027 2028 LOM-2014 LOM-2016 (internal) LOM-2017 63

64. Slide 64: Mine Operations

    RGM Operations Mine Operations Saran Sankar Operations Manager September 12, 2017

65. Slide 65: Strategy Alignment

    Strategy Alignment IAMGOLD Sustainability Strategy Cost Optimization Step change Innovation Productivity Safety 65

66. Slide 66: Meters Drilled & Tonnes Blasted

    10,000 meters • - 2.0 4.0 6.0 8.0 10.0 12.0 14.0 18.0 16.0 Jan'15 12.6 Feb'15 12.1 Mar'15 13.0 Apr'15 15.2 May'15 12.5 June'15 11.5 July'15 10.5 Aug'15 11.1 Sep'15 12.7 Oct'15 16.6 Nov'15 14.0 Dec'15 8.8 Jan'16 13.7 Feb'16 12.9 Mar'16 13.1 Apr'16 13.4 May'16 12.3 Meters Drilled June'16 11.8 July'16

67. Slide 67: Mine Productivities

    Mine Productivities • 23.1% Improvement in drill productivity in terms Drill Productivities (EHM/NOH) of Equivalent hard meters/NOH and 6.1% 24 increase in terms of gross meters/NOH 23 compared to 2015. 22 21 20 • Real time monitoring and reporting of drill parameters to ensure optimum performance.

68. Slide 68: Mine Productivities

    Mine Productivities Tire Life (NOH) 2015 -2017 YTD 5500 • 5% improvement in 777 and 7% improvement in 5000 785 tire life compared to 2015. 4500 4000 • Haul road management and reduced rolling 5297 resistance. 3500 5008 4679 • Optimum strut pressure 3000 4026 3824 • Payload management 3641 2500 • Inf

69. Slide 69: Key Performance Indicators

    Key Performance Indicators Drill Yield (T/Meter) 50 • Drill Yield 15.2% higher compared to 2015 driven by narrower pit operations in Mayo and Rosebel 45 pits. 40 • Conversion to 8/10 meter benches in all the pits. 48 48 46 46 46 35 • 44 Realized 10-15% expansion of drill patterns with 44 43 42 42 42

70. Slide 70: Key Performance Indicators

    0 5 10 15 20 25 30 35 40 45 50 • • • Jan'15 29 Feb'15 30 Mar'15 33 Apr'15 33 May'15 31 June'15 28 July'15 29 consumption. Aug'15 37 Sep'15 32 Oct'15 37 Nov'15 32 Dec'15 32 Jan'16 39 Feb'16 32 Mar'16 35 Apr'16 30 May'16 34 June'16 33 Deeper pits with longer hauls to dumps. July'16 44 Aug'16 37 Sep'16

71. Slide 71: Operational Costs – Drilling

    • • $- $10.00 $12.00 $2.00 $4.00 $6.00 $8.00 Jan'15 $5.44 Feb'15 $6.26 Mar'15 $6.36 Apr'15 $5.03 May'15 $5.52 bulk explosives. June'15 $6.13 July'15 $4.64 Aug'15 $6.57 Sep'15 $4.51 Oct'15 $3.78 below compared to 2015. Nov'15 $6.09 Dec'15 $3.71 Jan'16 $5.40 Feb'16 $4.36 Mar'16 $4.66 Apr'16 $6.35 May'

72. Slide 72: Operational Costs – Blasting & Tire

    • $- $0.05 $0.10 $0.15 $0.20 $0.25 $0.30 $0.35 $0.40 Jan'15 $0.36 Feb'15 $0.34 Mar'15 $0.28 Apr'15 $0.32 May'15 $0.31 June'15 $0.37 July'15 $0.34 Aug'15 $0.26 compared to 2015. Sep'15 $0.29 Oct'15 $0.27 Nov'15 $0.27 Dec'15 $0.30 Jan'16 $0.30 Feb'16 $0.29 Mar'16 $0.29 Apr'16 $0.27 May'16 $0.24 June'1

73. Slide 73: Operational Costs – Load & Haul

    • $0.10 $0.15 $0.20 $0.25 $0.30 $0.35 $0.40 $0.45 $0.50 $0.55 Jan'15 $0.44 Feb'15 $0.34 Mar'15 $0.46 Apr'15 $0.35 May'15 $0.37 June'15 $0.44 July'15 $0.39 Aug'15 $0.32 Sep'15 $0.31 Oct'15 $0.38 (8.5%) contributed majorly. Nov'15 $0.32 Dec'15 $0.36 Jan'16 $0.26 Feb'16 $0.28 Mar'16 $0.30 Apr'16 $0.33

74. Slide 74: Mine Maintenance - Strategic Objective

    Mine Maintenance - Strategic Objective Health & Safety Equipment Personal Cost – Capital Availability Development Spares Refocus on safety with Increase focus on the Increase the equipment regular inspection on work execution of systems knowledge of Extend Engine life & work areas and planned mainte

75. Slide 75: Maintenance Costs

    x 100000 • $10 $15 $20 $25 $30 $35 $40 Jan'15 $34 Feb'15 $32 Mar'15 $30 Apr'15 $30 budget 2017. May'15 $31 June'15 $28 July'15 $36 Aug'15 $28 Sep'15 $29 Oct'15 $35 Nov'15 $32 Dec'15 $21 Jan'16 $28 Maintenance Costs Feb'16 $31 Mar'16 $30 Apr'16 $32 May'16 $34 June'16 $33 July'16 $23 Aug'16 $35 1.1% h

76. Slide 76: Mill Operations

    RGM Operations Mill Operations John Grignon Operations Manager September 12, 2017

77. Slide 77: Mill Heat Map

    Mill Heat Map Leach tank (2 x) Secondary grinding

78. Slide 78: 2017 Highlights Operational

    2017 Highlights Operational Total Tonnes Milled YTD 6.4M vs 5.2M B CHALLENGES / FOCUS 1.20  Transition reporting to soft rock feeders Millions 1.00  Increased oversize hard rock 0.80  Limitation to hard rock capacity Tonnes Milled 0.60 0.40  Fine fragmentation of transition  Optimization of sec

79. Slide 79: Performance Highlights

    Performance Highlights Mill Recovery YTD 93.5 vs 94.5 B CHALLENGES / FOCUS 97% 96%  Carbon calcium loadings – impact on carbon 95% activity 94%  Lime – product quality and storage Mill Recovery 93%  Comminution grinds / Gravity performance 92% 91% 90%  Optimization of secondary grinding – ES / B

80. Slide 80: Cost Highlights

    Cost Highlights Mill Total Costs ($/tonne) CHALLENGES / FOCUS  Labor costs – utilization of manpower 9.00 8.00 7.00  Reagents costs – suppliers / negotiated contracts  Process set point controls – set point stability Costs ($/tonne) 6.00 5.00  4.00 3.00 Visual boards, short interval controls and

81. Slide 81: 2017 Highlights – Grinding Survey - CEET

    2017 Highlights – Grinding Survey - CEET 2 Rosebel LOM - Base Case 2000 100% BASE CASE 1800 90% 1600 80%  1SAG + 3BM – NO PC Plant Throughput (TPH) 1400 70% 1200 1000 60% 50%  100% HR = 5.4Mtpa 800 40% 600 30% 400 20% CEET2 200 10%  Grinding survey 0 0% completed Feb 2017 2013 2014 2015 2016 2017

82. Slide 82: 2017 Highlights – Advanced Process Control

    2017 Highlights – Advanced Process Control (Expert System) SAG Bearing SAG power draw at pressure stable target (5600 kW) Stockpile inventory OK? Stable Yes feeding Stable Controls by C.L Feeders are Expert available? Yes SAG Bearing pressure unstable SAG power draw below target Expert is online? Ye

83. Slide 83: 2017 Highlights – Laboratory PAL

    2017 Highlights – Laboratory PAL (pulverize and leach)  PAL  Improved sample representation, 300g vs 30g fire assay  Reduced analytical costs, $1.00/determination vs fire assay $3.00/determination  Single PAL machine 416/ determinations/day with current (2) PAL machines at 832 determinations – (

84. Slide 84: 2017 High Return Projects – Secondary Crusher

    2017 High Return Projects – Secondary Crusher  Secondary Crusher  Project start date February 2015  Construction start date June 2016  Commissioning date November 2016 as scheduled.  Budget 14M$ completed at 13.8M$  Secondary Crusher Optimization  Optimized Grizzly tine sizing 62mm  Optimize

85. Slide 85: 2017 High Return Projects – SAG Liners Design

    2017 High Return Projects – SAG Liners Design  SAG Grate Design  Increase slot relief from 10.5° to 12° - reduced blinding = reduced pooling  Double wide configuration sees 16 pieces vs 32 = reduced installation time  SAG Shell Design  Increase HR by 1%  Decrease face angle -2.5°  At 0.4g/t a

86. Slide 86: Mill 2017 Opportunities / Innovation

    Mill 2017 Opportunities / Innovation  SECONDARY PEBBLE CRUSHING  Pebble crusher optimization – additional grinding surveys with increased and decreased feed size following operation with phase 1 & CEET2 complete to determine:  Maintain current installation Pebble Crush #1 CV6  Increase capacity

87. Slide 87: 2017 Mill Opportunities

    2017 Mill Opportunities Opportunity Description Potential Impact PSA (pressure swing adsorption) – Oxygen enrichment to leach allowing for Target = 1% recovery / 1 increased recovery of 1.5% cash flow 3.5M$ / year Target = 5% CN savings / 2 Cyanide reduction – point addition strategy / chemistry inf

88. Slide 88: 2017 Achievements

    2017 Achievements  95.9% overall plant availability  93.5% recovery at high hard rock ratio and increased run rates.  44% hard rock run ratio at 12.7Mtpa run rate  At increased transition ratio (48%) and reduced soft rock ratio (8%)  Expert system control and >90% at full SAG power / maximum be

89. Slide 89: Finance

    RGM Operations Finance Remon van de Paal Finance Controller September 12, 2017

90. Slide 90: Accomplishments

    Accomplishments  Reduced like-for-like AISC from > $1,500 to < $1,000/oz  Created foundation for long-term Rosebel future  Productivity improvements through Business Excellence  Significant Workforce rationalization  Immense improvement in Labor relations  No strikes, no indexation to inflatio

91. Slide 91: Rosebel's Cost structure Transformation

    Rosebel’s Cost structure Transformation AISC-trend Rosebel Gold Mines N.V. 1,691 1,604 1,669 1,525 1,407 1,338 1,332 1,316 1,411 1,245 1,200 1,207 1,266 1,250 1,249 1,250 1,093 1,085 1,250 1,185 1,044 968 1,158 1,153 1,123 1,063 1,045 1,070 975 964 988 934 939 884 In 2011/2012 Rosebel’s 2013 to 2017

92. Slide 92: Tonnes Mined

    Tonnes Mined Million Tonnes Mined - Rosebel Gold Mines N.V. 90 78.0 80 75.2 77.5 74.1 74.6 71.4 72.7 69.6 70 64.5 65.2 64.8 66.5 63.2 63.2 64.1 63.7 60 61.3 63.1 63.5 62.8 57.2 58.4 56.7 50 50.3 Budget 2013-2017 49.8 Budget 2015-2019 46.0 40 Realized Budget 2017-2021 30 LOM 2017 (2018-2022) 20 2012

93. Slide 93: Significant increase Mill throughput

    Significant increase Mill throughput 16 Million Tonnes Milled 14 12.5 13.1 13.0 12.3 12.6 12.5 12.5 12.5 12 12.8 11.5 12.3 12.1 12.5 11.0 11.8 11.2 10.7 9.8 10 9.0 Budget 2013-2017 10.2 9.4 8.0 8.0 9.3 8 Budget 2015-2019 7.2 8.2 Realized 6 With essentially the same Mill Budget 2017-2021 configuratio

94. Slide 94: Gold produced

    Gold produced koz Gold produced - Rosebel Gold Mines N.V. 381 378 402 348 354 318 328 342 308 311 317 316 294 290 289 284 302 279 285 276 279 236 233 242 259 259 Budget 2013-2017 (undiluted) LOM 2017 is excluding Saramacca. The production Budget 2015-2019 (undiluted) profile beyond 2019 will signifi

95. Slide 95: Continued Reduction Mine costs: 15% below 2013/2014

    Continued Reduction Mine costs: 15% below 2013/2014 2013 - 2017 Mining Cost per tonne Mined by area 2.50 $2.34 $2.36 2.50 Continued $2.15 reduction in $1.95 $1.97 mining costs by 2.00 2.00 40% over $0.35/t from 27% 16% 54% 25% $2.34/t to $1.97/t 1.50 1.50 32% Despite +$0.15/t 34% 25% increase due to

96. Slide 96: Continued Reduction Mill costs: 15% below 2013

    Continued Reduction Mill costs: 15% below 2013 2013 - 2017 Milling Cost per tonne Mined by area (excl. Power) Continued $5.13 $4.93 reduction in 5.00 $4.95 $4.73 mining costs by $4.40 over $0.50/t 25% 16% 7% 4.00 42% 38% since 2014 (2014 is used as reference as 3.00 50% Ball Mill 3 was 51% 45% only

97. Slide 97: Workforce Rationalization

    Workforce Rationalization Rosebel Employees Tonnes mined (M) Number of Employees 1,400 70 63.1 63.5 64.1 64 61.3 1,200 57.2 60 53.1 1,000 50 983 990 973 937 800 40 825 600 691 675 30 459 492 487 460 458 469 426 400 20 200 10 74 74 65 70 50 43 43 0 0 2011A 2012A 2013A 2014A 2015A 2016A 2017F Hourly S

98. Slide 98: Mine Production

    Mine Production 80.0 4.0 70.0 64.1 3.5 61.4 61.8 63.5 60.0 57.2 3.0 Mine production Mtpa 50.0 2.5 40.0 2.0 31.5 30.0 1.5 20.0 1.0 10.0 0.5 0.0 - 2012A 2013A 2014A 2015A 2016A 2017A-6M Soft rock (Mtpa) 24.9 33.3 21.9 23.9 10.4 7.7 Trans rock (Mtpa) 22.3 17.8 20.1 21.8 32.4 8.2 Hard rock (Mtpa) 9.9 10

99. Slide 99: Mill Production

    Mill Production 16.0 8.0 14.0 12.8 13.1 12.6 7.0 12.1 12.3 12.3 12.0 6.0 10.0 5.0 8.0 4.0 6.3 Kt 6.0 3.0 4.0 2.0 2.0 1.0 0.0 0.0 2011A 2012A 2013A 2014 2015A 2016A 2017A-6M Soft Rock 3.8 3.9 5.2 4.9 3.1 2.0 2.3 Transitional Rock 6.5 6.3 4.1 4.3 5.5 6.4 0.9 Hardrock 1.7 2.6 3.0 3.8 3.7 4.2 2.1 Total

100. Slide 100: Operating Cost Trend

     Operating Cost Trend 350 300 278 273 252 252 250 227 227 200 $M 150 116 100 50 0 2011A 2012A 2013A 2014A 2015A 2016A 2017A-6M G&A Cost 32.3 36.1 41.3 31.7 29.9 22.9 11.8 Power Cost 35.9 39.1 22.8 32.9 24.7 24.0 13.7 Milling Cost 51.2 55.2 65.3 64.4 60.8 59.5 28.0 Mining Cost 107.1 121.4 143.3 148.9

101. Slide 101: Working Capital: 58% reduction since December 2013

     Working Capital: 58% reduction since December 2013 RGM - Operational Working Capital 120 120 60 60 in millions - 0 (60) (60) Dec-13 Dec-14 Dec-15 Dec-16 Mar-17 YTD A/P & Accrued Liabilities (27) (38) (27) (31) (33) (35) Tax Payable - (2) - (5) (10) (6) Lease Obligation - (5) - - - - Prepaid Expenses

102. Slide 102: We Tjaring Waka – Optimization initiatives

     We Tjaring Waka – Optimization initiatives Sl.No. Optimization initiatives 1 Light Vehicle Fleet Size Optimization 2 Supplier Payment Efficiency 3 Machine Data Boxes Accuracy and Repair Lead-time 4 Trash Screens Optimization 5 Crusher Optimization and Throughput Improvement 6 Drilling Process Operat

103. Slide 103: Rosebel Team THANK YOU!

     Rosebel Team THANK YOU! 95

IAMGOLD — Corporate Update (September 2017) on 6ix