Hecla Mining Company · NYSE:HL

Hecla Mining — Investor Presentation (October 2025)

70 slides from Hecla Mining's investor presentation, October 2025

  1. Slide 1: Largest Silver Producer in the U.S. and Canada - October 2025 Update

    Largest Silver Producer in the U.S. and Canada OCTOBER 2025 UPDATE RESPONSIBLE. SAFE. INNOVATIVE.

  2. Slide 2: Cautionary Statements

    HECLA MINING COMPANY NYSE: HL Cautionary Statements OCTOBER 2025 UPDATE Cautionary Statement Regarding Forward-Looking Statements, Including 2025 Outlook Qualified Person (QP) This presentation contains “forward-looking statements” within the meaning of Section 27A of the Securities Act of 1933, as

  3. Slide 3: Storied Past, Forward-Looking Vision

    HECLA MINING COMPANY NYSE: HL Storied Past, Forward-Looking Vision OCTOBER 2025 UPDATE  Drive continuous improvement through semi-automation and advanced Operational analytics Excellence  Improve standardized systems to improve mine planning and cost management  Executing strategic divestiture pr

  4. Slide 4: Our Asset Portfolio: Low Risk Jurisdictions

    HECLA MINING COMPANY NYSE: HL Our Asset Portfolio: Low Risk Jurisdictions OCTOBER 2025 UPDATE Alaska Yukon Greens Creek, Admiralty Island, Alaska Connaught, Dawson, Yukon Rackla, Mayo, Yukon Washington Keno Hill, Mayo, Yukon Republic, Republic, Washington Québec Montana Opinaca / Wildcat, James Bay,

  5. Slide 5: Why Invest in Hecla? Industry Leading Reserve Mine Life

    HECLA MINING COMPANY NYSE: HL Why Invest in Hecla? Industry Leading Reserve Mine Life OCTOBER 2025 UPDATE 18 18 17 Mines sorted by highest Colored - Primary Silver Mines Jacobina to lowest 2Q25 Gross Uncolored - Primary Gold Mines 16 Profit left to right 16 Lucky Friday 16 Keno Hill Rochester 14 Hec

  6. Slide 6: Why Invest in Hecla? Peer Leading Silver Exposure

    HECLA MINING COMPANY NYSE: HL Why Invest in Hecla? Peer Leading Silver Exposure OCTOBER 2025 UPDATE Exposure to Silver 50% Substantial silver revenue Percent of Total Resources Based in Silver exposure 40% HL  HL derived ~41% of Q2 2025 CDE revenue from silver. 30% PAAS AG Asset portfolio heavily f

  7. Slide 7: Why Invest in Hecla? Undervalued to Peer Group

    HECLA MINING COMPANY NYSE: HL Why Invest in Hecla? Undervalued to Peer Group OCTOBER 2025 UPDATE Undervalued Portfolio Hecla is the best value investment in the mid-cap silver space  Trades at ~$3.39 per silver equivalent ounce, lowest 3.00x among peers. 2.50x  Trading at ~1.71x NAV, a 6% AG disco

  8. Slide 8: Why Invest in Hecla? Potential to Recapture Premium

    HECLA MINING COMPANY NYSE: HL Why Invest in Hecla? Potential to Recapture Premium OCTOBER 2025 UPDATE Potential to re-rate  Historical premium P/NAV valuation to peer group*  Hecla Last 10 Years Average Premium – 17%  Hecla currently at a premium to peer average Source: Data extracted from RBC Ca

  9. Slide 9: Largest Silver Producer In The U.S. & Canada

    HECLA MINING COMPANY NYSE: HL Largest Silver Producer In The U.S. & Canada OCTOBER 2025 UPDATE 2024 World Production of Silver 2024 U.S. Silver Production (Moz) Hecla is the largest silver 23% producer in the U.S. and Mexico Canada. Three countries 46% Peru 13.4 produce ~50% of China the world’s sil

  10. Slide 10: Largest U.S./Canada Reserve Base With Highest Grades

    HECLA MINING COMPANY NYSE: HL Largest U.S./Canada Reserve Base With Highest Grades OCTOBER 2025 UPDATE Hecla and Peers: Silver Reserves and Reserve Grade Total Silver Equivalent Ounces (Moz) 2nd highest silver reserve grades, with the largest Silver Reserves (Moz) - 50 100 150 200 250 300 350 400 re

  11. Slide 11: Low-cost Profile Silver Assets

    HECLA MINING COMPANY NYSE: HL Low-cost Profile Silver Assets OCTOBER 2025 UPDATE 2024 Actual AISC(4): Hecla Is Strongly Positioned at the Lower End of the Silver Cost Curve $/oz AISC Silver Peers* Hecla $24.75 $23.88 $21.11 $19.43 $18.70 $14.38 $13.06 Silver Production (Kt) - 20,000 40,000 60,000 80

  12. Slide 12: Q2 Capital Allocation Achievements

    HECLA MINING COMPANY NYSE: HL Q2 Capital Allocation Achievements OCTOBER 2025 UPDATE Net Debt Reduction, Free Cash Flow Generation, Net Debt to Adjusted EBITDA Capital Structure Optimization All assets across portfolio contributing to positive Achieved Net Leverage Ratio* of 0.7x cash flow  Record

  13. Slide 13: Committed To Responsible Mining

    HECLA MINING COMPANY NYSE: HL Committed To Responsible Mining OCTOBER 2025 UPDATE 2024 All-Injury Frequency Rate of 1.86 (*)  Introduced a program focused on safety values: Safety 365 – Work Safe, Home Safe 44,736 hours of safety and health training for Small environmental footprint employees and c

  14. Slide 14: Our Operations

    OUR OPERATIONS Silver mines are in the best third of cost curve RESPONSIBLE. SAFE. INNOVATIVE. 14

  15. Slide 15: Performance Overview – Last Five Quarters

    HECLA MINING COMPANY NYSE: HL Performance Overview – Last Five Quarters OCTOBER 2025 UPDATE Dollars in thousands unless otherwise stated 2Q-2025 1Q-2025 4Q-2024 3Q-2024 2Q-2024 Silver Production (oz.) 4,520,510 4,112,394 3,874,344 3,645,004 4,458,484 Gold Production (oz.) 45,895 34,232 35,727 32,280

  16. Slide 16: Greens Creek: Cornerstone Mine, Foundation Of Our Future

    HECLA MINING COMPANY NYSE: HL Greens Creek: Cornerstone Mine, Foundation Of Our Future GREENS CREEK OCTOBER 2025 UPDATE Metals Location Reserve Mine Plan 2024 Economic Impact Ag, Au, Pb, Zn, Cu Alaska 12 Years $266M Ag Reserves & Resources Cumulative Free Cash Flow(1) (Billions $) As of December 31,

  17. Slide 17: Greens Creek: Continuous Improvement Since Acquisition

    HECLA MINING COMPANY NYSE: HL Continuous Improvement Since Acquisition GREENS CREEK OCTOBER 2025 UPDATE Mill Throughput Focused on Quality over Quantity Silver/Gold Mill Recoveries, 2008 – Q2 2025 Tons per Day % 9% increase in silver recoveries, Recent shift of focus and 15% increase in gold on qual

  18. Slide 18: Lucky Friday: 2nd Cornerstone Mine

    HECLA MINING COMPANY NYSE: HL Lucky Friday: 2nd Cornerstone Mine LUCKY FRIDAY OCTOBER 2025 UPDATE Metals Location Reserve Mine Plan 2024 Economic Impact Ag, Pb, Zn Idaho 17 Years $171M Ag Reserves & Resources Silver Production As of December 31, 2024 (Moz) ~2x 50 by Decade* (Projected) P&P : 72 Moz

  19. Slide 19: Underhand Closed Bench (UCB) Method

    HECLA MINING COMPANY NYSE: HL Underhand Closed Bench (UCB) Method LUCKY OCTOBERFRIDAY 2025 UPDATE Large-scale blasting proactively helps manage seismic risk and increases throughput More innovative: uses Safer: miners work advanced drilling and blasting below engineered techniques to fragment the ba

  20. Slide 20: Keno Hill: Largest Silver Producer In Canada

    HECLA MINING COMPANY NYSE: HL Keno Hill: Largest Silver Producer In Canada KENO HILL OCTOBER 2025 UPDATE Metals Location Reserve Mine Plan 2024 Economic Impact Ag, Pb, Zn Yukon 16 Years $179M Ag Reserves & Resources Undiscounted Annual Cashflows Over Next Five Years As of December 31, 2024 $150 P&P

  21. Slide 21: Path to Profitability at 440 Tons Per Day

    HECLA MINING COMPANY NYSE: HL Path to Profitability at 440 Tons Per Day KENO HILL OCTOBER 2025 UPDATE Key Consistent 440 tons per day Requirements Q2 2025 Mill Throughput  Reliable power supply Infrastructure  Cemented tails batch plant to transition to Silver production of 750.7 Koz at Requiremen

  22. Slide 22: Casa Berardi: Strong Cash Generation Driving Strategic Options

    HECLA MINING COMPANY NYSE: HL Casa Berardi: Strong Cash Generation Driving Strategic Options CASA BERARDI OCTOBER 2025 UPDATE Metals Location Reserve Mine Plan 2024 Economic Impact Au Quebec 12 Years $259M Au Reserves & Resources As of December 31, 2024  Strategic Review Update: P&P : 1,291 Koz  R

  23. Slide 23: Financial Comparisons – Undiscounted Cumulative Cashflows Through 2027

    HECLA MINING COMPANY Financial Comparisons – Undiscounted Cumulative Cashflows NYSE: HL Through 2027 OCTOBER 2025 UPDATE 2026/2027 cashflows include open pit only; further upside potential with extension of underground $350 Gold Price $300 $2,800 $3,300 $3,500 $4,000 CCF: $290M ROIC 3 years (2025 -

  24. Slide 24: Discovering And Expanding Resources

    HECLA MINING COMPANY NYSE: HL Discovering And Expanding Resources OCTOBER 2025 UPDATE $28M Greens Creek ($9M) Focus on resource Exploration Budget for 2025, expansion and conversion to expand focused on Greens Creek and and upgrade multiple ore zones Keno Hill, with significant investment in Nevada

  25. Slide 25: Nevada Exploration Ramping Up in Q2 2025

    HECLA MINING COMPANY NYSE: HL Nevada Exploration Ramping Up in Q2 2025 OCTOBER 2025 UPDATE Unlock hidden value in Nevada Operating History:  Midas: 2.2 Moz gold, 27.0 Moz silver historically at 0.5 oz/ton gold equivalent; fully permitted mill with tailings capacity.  Hollister: 0.5 Moz gold equiva

  26. Slide 26: Financial Review

    FINANCIAL REVIEW RESPONSIBLE. SAFE. INNOVATIVE. 26

  27. Slide 27: Second Quarter Financial Highlights

    HECLA MINING COMPANY NYSE: HL Second Quarter Financial Highlights OCTOBER 2025 UPDATE Q2/25 Revenues By Metal Net Debt – Last Six Months Siver accounts for 41% of revenues in millions $ Silver Gold Lead Zinc 523.8 545.0 10% 7% Q2 2025 41% 268.2 Revenue s $297M* 42% Q4 2024 Q1 2025 Q2 2025 Q2/25 Reve

  28. Slide 28: Strong Silver Margins Drive Free Cash Flow Generation

    HECLA MINING COMPANY NYSE: HL Strong Silver Margins Drive Free Cash Flow Generation OCTOBER 2025 UPDATE Strong Silver Margins(3) Q2 Free Cash Flow(1) by Operation ($/silver ounce) (in millions $) Greens Creek Record quarterly free Margins are ~2/3 of silver price cash flow(1) in Q2, AISC (4) Realize

  29. Slide 29: Appendix: End Notes and GAAP Reconciliations

    APPENDIX End Notes and GAAP reconciliations RESPONSIBLE. SAFE. INNOVATIVE. 29

  30. Slide 30: Guidance – Strong Silver Margins And Production

    HECLA MINING COMPANY NYSE: HL Guidance – Strong Silver Margins And Production OCTOBER 2025 UPDATE Silver Production (Moz) Gold Production (Koz) Silver Equivalent (Moz)(6) Gold Equivalent (Koz)(6) Greens Creek * 8.1 – 8.8 50 – 55 18.0 – 19.5 189 – 200 2025 Production Lucky Friday * 4.7 – 5.1 N/A 8.0

  31. Slide 31: Silver Market

    SILVER MARKET RESPONSIBLE. SAFE. INNOVATIVE. 31

  32. Slide 32: The World’s Growing Needs For Silver

    HECLA MINING COMPANY NYSE: HL The World’s Growing Needs For Silver OCTOBER 2025 UPDATE Five distinct periods of silver demand, three that Despite decrease in photographic demand, total are strengthening demand increased 30%, or 269Moz due to the increase in industrial and investment demand  Monetar

  33. Slide 33: Silver Supply And Demand

    HECLA MINING COMPANY NYSE: HL Silver Supply And Demand OCTOBER 2025 UPDATE 2024 SILVER DEMAND: 1,164 Moz 2024 SILVER SUPPLY: 1,015 Moz Other 3% Jewelry and Recycling Silverware Photo Mine Prod. - Other voltaics 19% Primary Silver 23% 25% 29% 23% Brazing Alloys Investment 49% Electronics Mine Prod. -

  34. Slide 34: Silver Deficit Is Expected To Continue

    HECLA MINING COMPANY NYSE: HL Silver Deficit Is Expected To Continue OCTOBER 2025 UPDATE Moz $/oz $38 1,200 $34 700 1,284 1,199 1,164 1,148 $30 1,102 993 973 1,001 1,006 929 200 $26 $22 300 1,025 1,014 1,016 974 1,023 1,035 998 1,015 1,031 1,057 $18 800 $14 Demand Supply Net Market Position Silver P

  35. Slide 35: Solar Will Be The Largest Source Of Electricity

    HECLA MINING COMPANY NYSE: HL Solar Will Be The Largest Source Of Electricity OCTOBER 2025 UPDATE 1 Gigawatt (GW) of solar capacity requires 0.45Moz of silver U.S. Electricity Generation Sources: 2000-2050 2022 Solar projected to be 33% of total Gigawatt history | projections U.S. energy generation

  36. Slide 36: More Efficient PV Technologies Use More Silver And Are Gaining Market Share

    HECLA MINING COMPANY More Efficient Photovoltaic (PV) Technologies Use More Silver And NYSE: HL Are Gaining Market Share OCTOBER 2025 UPDATE Silver Content in PV Technologies Market Share of PV Technologies Mg Silver/Watt Higher silver using technologies are gaining 22 market share PV Installations

  37. Slide 37: Exploration

    EXPLORATION RESPONSIBLE. SAFE. INNOVATIVE. 37

  38. Slide 38: Nevada – Drilling Underway at Midas

    Nevada – Drilling Underway at Midas HECLA MINING COMPANY NYSE: HL Ramping up activity in Nevada through exploration and evaluating milling opportunities OCTOBER 2025 UPDATE Proven and Probable Measured and Indicated Inferred Silver 2025 Production Proven and Probable Measured and Indicated Inferred

  39. Slide 39: Midas – Visible Gold Intersected at the Pogo and SE Sinter Offset Targets

    Midas – Visible Gold Intersected at the Pogo and SE Sinter Offset Targets HECLA MINING COMPANY NYSE: HL 7 out of 12 exploration drillholes have been completed to date OCTOBER 2025 UPDATE Proven and Probable Measured and Indicated Inferred Silver 2025 Production Proven and Probable Measured and Indic

  40. Slide 40: Greens Creek – Underground and Surface Exploration Programs Well Underway

    Greens Creek – Underground and Surface Exploration Programs Well HECLA MINING COMPANY NYSE: HL Underway at Greens Creek, Initial Results are Encouraging OCTOBER 2025 UPDATE Proven and Probable Measured and Indicated Inferred Silver 2025 Production Proven and Probable Measured and Indicated Inferred

  41. Slide 41: Greens Creek – Underground Exploration Extends Mineralization 550 feet Down Plunge

    Greens Creek – Underground Exploration Extends Mineralization 550 HECLA MINING COMPANY NYSE: HL feet Down Plunge from Existing Gallagher Resource OCTOBER 2025 UPDATE Proven and Probable Measured and Indicated Inferred Silver 2025 Production Proven and Probable Measured and Indicated Inferred SEO 202

  42. Slide 42: Greens Creek – Underground Exploration Drilling Results

    Greens Creek – Underground Exploration Drilling Results HECLA MINING COMPANY NYSE: HL Underground Exploration Delivers Significant Results in Gallagher and 200S Zones OCTOBER 2025 UPDATE Proven and Probable Measured and Indicated Inferred Silver 2025 Production Proven and Probable Measured and Indic

  43. Slide 43: Keno Hill – 2025 Surface Exploration Drilling Program Completed

    Keno Hill – 2025 Surface Exploration Drilling Program Completed HECLA MINING COMPANY NYSE: HL Expanding High-Grade Mineralization Near Bermingham Deposit OCTOBER 2025 UPDATE Proven and Probable Measured and Indicated Inferred Silver 2025 Production Proven and Probable Measured and Indicated Inferred

  44. Slide 44: Keno Hill – Surface Exploration Identifies New Bermingham Ore Shoot

    Keno Hill – Surface Exploration Identifies New Bermingham Ore Shoot HECLA MINING COMPANY NYSE: HL 500 Feet Down Plunge from Existing Reserve OCTOBER 2025 UPDATE Proven and Probable Measured and Indicated Inferred Silver 2025 Production Proven and Probable Measured and Indicated Inferred SEO 2025 Exp

  45. Slide 45: Keno Hill – Q2 2025 Exploration Drilling – Key Points

    Keno Hill – Q2 2025 Exploration Drilling – Key Points HECLA MINING COMPANY NYSE: HL Exploration Drilling Continues to Identify High-Grade Potential Near Bermingham OCTOBER 2025 UPDATE Proven and Probable Measured and Indicated Inferred Silver 2025 Production Proven and Probable Measured and Indicate

  46. Slide 46: Montana Assets: 3rd Largest Undeveloped Cu Deposit In The U.S.

    HECLA MINING COMPANY NYSE: HL Montana Assets: 3rd Largest Undeveloped Cu Deposit In The U.S. OCTOBER 2025 UPDATE Located 50 miles from Lucky Friday Working to advance underground data with great exploration potential collection and permitting Permitting strategy -  Executing strategy to expedite au

  47. Slide 47: Environmental, Social, Governance

    Environmental, Social, Governance Our sustainable ESG Corporate Governance responsibilities RESPONSIBLE. SAFE. INNOVATIVE. 47

  48. Slide 48: Sustainability Rating Agency Scores: Significant Improvements Since 2019

    HECLA MINING COMPANY Sustainability Rating Agency Scores: Significant Improvements NYSE: HL Since 2019 OCTOBER 2025 UPDATE Agency Progression in ESG Scores  Overall Score increased from 53rd 38 40 39 percentile to 77th percentile  Environmental Score increased to 24 83rd percentile 15 13  Social

  49. Slide 49: ESG Performance And Ratings

    HECLA MINING COMPANY NYSE: HL ESG Performance And Ratings OCTOBER 2025 UPDATE Ranking: 40 Score: 32.1 (0 best, 100 worst) 76th Percentile Industry 56/107, 52nd percentile Subindustry 18/25, 71st percentile Rating: A Rating: C Score: 6.3 Environment: 5 (1 best, 10 worst) Social: 6 (1 best, 10 worst)

  50. Slide 50: Hecla Is Among The Safest Mining Companies

    HECLA MINING COMPANY NYSE: HL Hecla Is Among The Safest Mining Companies OCTOBER 2025 UPDATE Implemented NMA’s CORESafety standards in 2012, became Industry leader All-Injury Frequency Rate Hecla’s 1.86 rate has seen a 6.06 70% reduction since 2012 5.35 5.41 Industry leading 4.57 70% reduction since

  51. Slide 51: Committed To Our Communities

    HECLA MINING COMPANY NYSE: HL Committed To Our Communities OCTOBER 2025 UPDATE Largest private employer within the Total economic impact in 2024 communities we operate, jobs and benefits that last a lifetime $1B+  Total direct economic impact of over $1 Hecla Corporate Montana billion $130M $2M Gre

  52. Slide 52: End Notes

    HECLA MINING COMPANY NYSE: HL End Notes OCTOBER 2025 UPDATE 1. Free cash flow is a non-GAAP measure and is calculated as cash flow from operations less additions to property, plant and equipment net of finance leases. Reconciliation to GAAP is shown in the appendix. 2. Net debt to adjusted EBITDA is

  53. Slide 53: GAAP Reconciliations

    GAAP RECONCILIATIONS RESPONSIBLE. SAFE. INNOVATIVE. 53

  54. Slide 54: Adjusted EBITDA

    HECLA MINING COMPANY NYSE: HL Adjusted EBITDA OCTOBER 2025 UPDATE Reconciliation of Net Income (GAAP) to Adjusted EBITDA (non-GAAP) Last Twelve Months Q2 2025 Q1 2025 Dollars in thousands (USD) Net income $ 100,262 $ 70,427 Interest expense 47,335 48,741 Income and mining tax expense 68,225 44,744 D

  55. Slide 55: Cash Cost And AISC Reconciliation To GAAP

    HECLA MINING COMPANY NYSE: HL Cash Cost And AISC Reconciliation To GAAP OCTOBER 2025 UPDATE Silver Total Cost of Sales (GAAP) to Cash Cost, Before By-product Credits and Cash Cost, After By-product Credits (non-GAAP) and All-In Sustaining Costs, Before By-product Credits, per Ounce and All-In Sustai

  56. Slide 56: Cash Cost And AISC Reconciliation To GAAP – Greens Creek

    HECLA MINING COMPANY NYSE: HL Cash Cost And AISC Reconciliation To GAAP OCTOBER 2025 UPDATE Greens Creek Total Cost of Sales (GAAP) to Cash Cost, Before By-product Credits and Cash Cost, After By-product Credits (non-GAAP) and All-In Sustaining Costs, Before By-product Credits, per Ounce and All-In

  57. Slide 57: Cash Cost And AISC Reconciliation To GAAP – Lucky Friday

    HECLA MINING COMPANY NYSE: HL Cash Cost And AISC Reconciliation To GAAP OCTOBER 2025 UPDATE Lucky Friday Total Cost of Sales (GAAP) to Cash Cost, Before By-product Credits and Cash Cost, After By-product Credits (non-GAAP) and All-In Sustaining Costs, Before By-product Credits, per Ounce and All-In

  58. Slide 58: Cash Cost And AISC Reconciliation To GAAP – Casa Berardi

    HECLA MINING COMPANY NYSE: HL Cash Cost And AISC Reconciliation To GAAP OCTOBER 2025 UPDATE Casa Berardi Total Cost of Sales (GAAP) to Cash Cost, Before By-product Credits and Cash Cost, After By-product Credits (non-GAAP) and All-In Sustaining Costs, Before By-product Credits, per Ounce and All-In

  59. Slide 59: Free Cash Flow (Non-GAAP) Reconciliation

    HECLA MINING COMPANY NYSE: HL Free Cash Flow (Non-GAAP) Reconciliation OCTOBER 2025 UPDATE Q2 2025 Reconciliation of cash provided by operating activities (GAAP) to Free Cash Flow (non-GAAP) for All Operations Greens Creek Lucky Friday Keno Hill Casa Berardi in millions Cash provided by operating ac

  60. Slide 60: Mineral Reserves And Resources

    MINERAL RESERVES AND RESOURCES RESPONSIBLE. SAFE. INNOVATIVE. 60

  61. Slide 61: Mineral Reserves – 12/31/2024 (1/4)

    HECLA MINING COMPANY NYSE: HL Mineral Reserves – 12/31/2024(1) (1/4) OCTOBER 2025 UPDATE Proven Reserves(1) Silver Gold Lead Zinc Silver Gold Lead Zinc Asset Location Ownership Tons (000) (oz/ton) (oz/ton) % % (000 oz) (000 oz) Tons Tons Greens 100.0% 9 7.6 0.07 2.4 6.5 70 1 220 600 Creek (2,3) Luck

  62. Slide 62: Mineral Reserves – 12/31/2024 (2/4)

    HECLA MINING COMPANY NYSE: HL Mineral Reserves – 12/31/2024(1) (2/4) OCTOBER 2025 UPDATE Probable Reserves(7) Silver Gold Lead Zinc Silver Gold Lead Zinc Asset Location Ownership Tons (000) (oz/ton) (oz/ton) % % (000 oz) (000 oz) Tons Tons Greens 100.0% 10,438 9.9 0.08 2.3 6.2 103,641 864 240,450 64

  63. Slide 63: Mineral Reserves – 12/31/2024 (3/4)

    HECLA MINING COMPANY NYSE: HL Mineral Reserves – 12/31/2024(1) (3/4) OCTOBER 2025 UPDATE Proven and Probable Reserves Silver Gold Lead Zinc Silver Gold Lead Zinc Asset Location Ownership Tons (000) (oz/ton) (oz/ton) % % (000 oz) (000 oz) Tons Tons Greens 100.0% 10,447 9.9 0.08 2.3 6.2 103,771 865 24

  64. Slide 64: Mineral Reserves – 12/31/2024 (4/4)

    HECLA MINING COMPANY NYSE: HL Mineral Reserves – 12/31/2024(1) (4/4) OCTOBER 2025 UPDATE 1. The term “reserve” means an estimate of tonnage and grade or quality of indicated and measured mineral resources that, in the opinion of the qualified person, can be the basis of an economically viable projec

  65. Slide 65: Mineral Resources - 12/31/2024 (1/6)

    HECLA MINING COMPANY NYSE: HL Mineral Resources - 12/31/2024(8) (1/6) OCTOBER 2025 UPDATE Measured Resources(9) Silver Gold Lead Zinc Copper Silver Gold Lead Zinc Copper Asset Location Ownership Tons (000) (oz/ton) (oz/ton) % % % (000 oz) (000 oz) (Tons) (Tons) (Tons) Greens Creek(12,13) 100.0% - -

  66. Slide 66: Mineral Resources - 12/31/2024 (2/6)

    HECLA MINING COMPANY NYSE: HL Mineral Resources - 12/31/2024(8) (2/6) OCTOBER 2025 UPDATE Indicated Resources(10) Silver Gold Lead Zinc Copper Silver Gold Lead Zinc Copper Asset Location Ownership Tons (000) (oz/ton) (oz/ton) % % % (000 oz) (000 oz) (Tons) (Tons) (Tons) Greens Creek(12,13) 100.0% 7,

  67. Slide 67: Mineral Resources - 12/31/2024 (3/6)

    HECLA MINING COMPANY NYSE: HL Mineral Resources - 12/31/2024(8) (3/6) OCTOBER 2025 UPDATE Measured & Indicated Resources Silver Gold Lead Zinc Copper Silver Gold Lead Zinc Copper Asset Location Ownership Tons (000) (oz/ton) (oz/ton) % % % (000 oz) (000 oz) (Tons) (Tons) (Tons) Greens Creek(12,13) 10

  68. Slide 68: Mineral Resources - 12/31/2024 (4/6)

    HECLA MINING COMPANY NYSE: HL Mineral Resources - 12/31/2024(8) (4/6) OCTOBER 2025 UPDATE Inferred Resources(11) Silver Gold Lead Zinc Copper Silver Gold Lead Zinc Copper Asset Location Ownership Tons (000) (oz/ton) (oz/ton) % % % (000 oz) (000 oz) (Tons) (Tons) (Tons) Greens Creek(12,13) 100.0% 1,8

  69. Slide 69: Mineral Resources - 12/31/2024 (5/6)

    HECLA MINING COMPANY NYSE: HL Mineral Resources - 12/31/2024(8) (5/6) OCTOBER 2025 UPDATE Note: All estimates are in-situ except for the proven reserves at Greens Creek and Keno Hill which are in surface stockpiles. Stockpile materials make up 26.5k tons of proven reserves at Casa Berardi . Mineral

  70. Slide 70: Mineral Resources - 12/31/2024 (6/6)

    HECLA MINING COMPANY NYSE: HL Mineral Resources - 12/31/2024(8) (6/6) OCTOBER 2025 UPDATE 17. Mineral resources for underground zones at San Sebastian reported at a cut-off value of $158.8/ton ($175/tonne), open pit resources reported at a cut-off value of $72.6/ton ($80/tonne); Metallurgical recove

Hecla Mining Company — Investor Presentation (October 2025) on 6ix