Hecla Mining : at THE Mining Investment Event of the North

Largest U.S. silver producer, soon-to-be largest Canadian silver producer

THE Mining Investment EVENT of the North

June 4, 2024

RESPONSIBLE. SAFE. INNOVATIVE.

CAUTIONARY STATEMENTS

Cautionary Statement Regarding Forward-Looking Statements

This presentation contains "forward-looking statements" within the meaning of Section 27A of the Securities Act of 1933, as amended, and Section 21E of the Securities Exchange Act of 1934, as amended, which are intended to be covered by the safe harbor created by such sections and other applicable laws, including Canadian securities laws. Words such as "may", "will", "should", "expects", "intends", "projects", "believes", "estimates", "targets", "anticipates" and similar expressions are used to identify these forward-looking statements. Such forward-looking statements may include, without limitation: (i) the projections contained in the Technical Report Summary for each of Casa Berardi and Keno Hill; (ii) Lucky Friday is expected to ramp-up to full production in the first quarter of 2024; (iii) approximately $50 million in proceeds from the Company's property insurance policy will be collected in 2024; (iv) Keno Hill's production will increase over time; (v) the Company expects to pay down on its revolving credit facility in 2024; (vi) the Company expects all four of its mines to be in operation in 2024;

1. the Company expects silver production to increase by 15-20% in 2024, and by 30% by 2026; (viii) Casa Berardi will be a full surface operation by mid-2024; (ix) the Company will soon be Canada's largest silver producer; (x) Greens Creek and Lucky Friday will generate free cash flow in 2024; (xi) the projections contained in the Technical Report Summary for each of Casa Berardi and Keno Hill; (xii) approximately $50 million in proceeds from the Company's property insurance policy will be collected in 2024; (xiii) Keno Hill will ramp-up production in 2024;

1. mine-specificand Company-wide 2024 estimates of future production, and 2025 and 2026 estimates of future production Company- wide; (xv)total cost of sales, as well as cash cost and AISC per ounce (in each case after by-product credits) for Greens Creek, Lucky Friday and Casa Berardi; and (xvi) Company-wide estimated spending on capital, exploration and pre-development for 2024. The material factors or assumptions used to develop such forward-looking statements or forward-looking information include that the Company's plans for development and production will proceed as expected and will not require revision as a result of risks or uncertainties, whether known, unknown or unanticipated, to which the Company's operations are subject.

Estimates or expectations of future events or results are based upon certain assumptions, which may prove to be incorrect, which could cause actual results to differ from forward-looking statements. Such assumptions, include, but are not limited to: (i) there being no significant change to current geotechnical, metallurgical, hydrological and other physical conditions; (ii) permitting, development, operations and

expansion of the Company's projects being consistent with current expectations and mine plans; (iii) political/regulatory developments in

any jurisdiction in which the Company operates being consistent with its current expectations; (iv) the exchange rate for the USD/CAD being approximately consistent with current levels; (v) certain price assumptions for gold, silver, lead and zinc; (vi) prices for key supplies being approximately consistent with current levels; (vii) the accuracy of our current mineral reserve and mineral resource estimates; (viii) there being no significant changes to the availability of employees, vendors and equipment; (ix) the Company's plans for development and production will proceed as expected and will not require revision as a result of risks or uncertainties, whether known, unknown or unanticipated; (x) counterparties performing their obligations under hedging instruments and put option contracts; (xi) sufficient workforce is available and trained to perform assigned tasks; (xii) weather patterns and rain/snowfall within normal seasonal ranges so as not to impact operations; (xiii) relations with interested parties, including First Nations and Native Americans, remain productive; (xiv) maintaining availability of water rights; (xv) factors do not arise that reduce available cash balances; and (xvi) there being no material increases in our current requirements to post or maintain reclamation and performance bonds or collateral related thereto.

In addition, material risks that could cause actual results to differ from forward-looking statements include, but are not limited to: (i) gold, silver and other metals price volatility; (ii) operating risks; (iii) currency fluctuations; (iv) increased production costs and variances in ore grade or recovery rates from those assumed in mining plans; (v) community relations; (vi) conflict resolution and outcome of projects or oppositions;

1. litigation, political, regulatory, labor and environmental risks; (viii) exploration risks and results, including that mineral resources are not mineral reserves, they do not have demonstrated economic viability and there is no certainty that they can be upgraded to mineral reserves through continued exploration; (ix) the failure of counterparties to perform their obligations under hedging instruments; (x) we take a material impairment charge on any of our assets; and (xi) inflation causes our costs to rise more than we currently expect. For a more detailed discussion of such risks and other factors, see the Company's 2023 Annual Report on Form 10-K, filed with the Securities and Exchange Commission ("SEC") on February 15, 2024. The Company does not undertake any obligation to release publicly, revisions to any "forward-looking statement," including, without limitation, outlook, to reflect events or circumstances after the date of this presentation, or to reflect the occurrence of unanticipated events, except as may be required under applicable securities laws. Investors should not assume that any lack of update to a previously issued "forward-looking statement" constitutes a reaffirmation of that statement. Continued reliance on "forward-looking statements" is at investors' own risk.

Cautionary Statements to Investors on Reserves and Resources

This presentation uses the terms "mineral resources", "measured mineral resources", "indicated mineral resources" and "inferred mineral

HECLA MINING COMPANY

NYSE: HL

THE Mining Investment EVENT

of the North, June 4, 2024

resources." Mineral resources that are not mineral reserves do not have demonstrated economic viability. You should not assume that all or any part of measured or indicated mineral resources will ever be converted into mineral reserves. Further, inferred mineral resources have a great amount of uncertainty as to their existence and as to whether they can be mined legally or economically, and an inferred mineral resource may not be considered when assessing the economic viability of a mining project, and may not be converted to a mineral reserve. We report reserves and resources under the SEC's mining disclosure rules ("S-K 1300") and Canada's National Instrument 43-101 - Standards of Disclosure for Mineral Projects ("NI 43-101") because we are a "reporting issuer" under Canadian securities laws. Unless otherwise indicated, all resource and reserve estimates contained in this presentation have been prepared in accordance with S-K 1300 as well as NI 43-101.

Qualified Person (QP)

Kurt D. Allen, MSc., CPG, VP - Exploration of Hecla Mining Company and Keith Blair, MSc., CPG, Chief Geologist of Hecla Limited, who serve as a Qualified Person under S-K 1300 and NI 43-101, supervised the preparation of the scientific and technical information concerning Hecla's mineral projects in this presentation. Technical Report Summaries for each of the Company's Greens Creek and Lucky Friday properties are filed as exhibits 96.1 and 96.2 respectively, to the Company's Annual Report on Form 10-K for the year ended December 31, 2022 and are available at www.sec.gov. A Technical Report Summary for each of the Company's Casa Berardi and Keno Hill properties will be filed as exhibits 96.3 and 96.4, respectively, to the Company's Annual Report on Form 10-K for the year ended December 31, 2023 to be filed on February 15, 2024 and will then be available at www.sec.gov. Information regarding data verification, surveys and investigations, quality assurance program and quality control measures and a summary of analytical or testing procedures for (i) the Greens Creek Mine are contained in its Technical Report Summary and in a NI 43-101 technical report titled "Technical Report for the Greens Creek Mine" effective date December 31, 2018, (ii) the Lucky Friday Mine are contained in its Technical Report Summary and in its technical report titled "Technical Report for the Lucky Friday Mine Shoshone County, Idaho, USA" effective date April 2, 2014, (iii) Casa Berardi will be contained in its Technical Report Summary titled "Technical Report Summary on the Casa Berardi Mine, Northwestern Quebec, Canada" effective date December 31, 2023 and are contained in its NI 43-101 technical report titled "Technical Report on the mineral resource and mineral reserve estimate for Casa Berardi Mine, Northwestern Quebec, Canada" effective date December 31, 2018, (iv) Keno Hill will be contained in its Technical Report Summary titled "S-K 1300 Technical Report Summary on the Keno Hill Mine, Yukon, Canada" and are contained its NI 43-101 technical report titled "Technical Report on Updated Mineral Resource and Reserve Estimate of the Keno Hill Silver District" effective date April 1, 2021, and (v) the San Sebastian Mine, Mexico, are contained in a technical report prepared for Hecla titled "Technical Report for the San Sebastian Ag-Au Property, Durango, Mexico" effective date September 8, 2015. Also included or to be included in each technical reports is a description of the key assumptions, parameters and methods used to estimate mineral reserves and resources and a general discussion of the extent to which the estimates may be affected by any known environmental, permitting, legal, title, taxation, socio-political, marketing, or other relevant factors. Information regarding data verification, surveys and investigations, quality assurance program and quality control measures and a summary of sample, analytical or testing procedures are contained in technical reports prepared for Klondex Mines Ltd. for (i) the Fire Creek Mine (technical report dated March 31, 2018), (ii) the Hollister Mine (technical report dated May 31, 2017, amended August 9, 2017), and (iii) the Midas Mine (technical report dated August 31, 2014, amended April 2, 2015). Information regarding data verification, surveys and investigations, quality assurance program and quality control measures and a summary of sample, analytical or testing procedures are contained in technical reports prepared for ATAC Resources Ltd. for (i) the Osiris Project (technical report dated July 28, 2022) and (ii) the Tiger Project (technical report dated February 27, 2020). Copies of these technical reports are available under the SEDAR profiles of Klondex Mines Unlimited Liability Company and ATAC Resources Ltd., respectively, at www.sedar.com (the Fire Creek technical report is also available under Hecla's profile on SEDAR). Mr. Allen and Mr. Blair reviewed and verified information regarding drill sampling, data verification of all digitally collected data, drill surveys and specific gravity determinations relating to all the mines. The review encompassed quality assurance programs and quality control measures including analytical or testing practice, chain-of-custody procedures, sample storage procedures and included independent sample collection and analysis. This review found the information and procedures meet industry standards and are adequate for Mineral Resource and Mineral Reserve estimation and mine planning purposes.

Cautionary Note Regarding Non-GAAP measures

Cash cost and AISC per ounce of silver and gold, after by-product credits, EBITDA, adjusted EBITDA, All-in Sustaining Costs, after by-product credits, realized silver margin, and free cash flow represent non-U.S. Generally Accepted Accounting Principles (GAAP) measurements. A reconciliation of these non-GAAP measures to the most comparable GAAP measurements can be found in the Appendix.

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WHAT MAKES HECLA THE PREMIER SILVER INVESTMENT

Best In Class Silver Portfolio

▪ Leading Silver Producer in the World's Best Mining

Jurisdictions

▪ Largest U.S silver producer (45%)*, Canada's by 2024, 3rd largest primary silver producer globally

▪ Safe and Sustainable Mining

▪ Demonstrated safety record, small environmental footprint with net zero emissions

▪ Lowest Cost Silver Mines Amongst Peers

▪ Silver mines in the best one-third of cost curve

▪ Near-Term, Capital Efficient Organic Growth

▪ Up to 20Moz by 2026

▪ High-Quality Reserve Base

▪ Reserve mine lives of 10+ years, significant additional resource base

▪ Culture of Innovation and Operational Excellence

* 2022 Data

HECLA MINING COMPANY NYSE: HL

THE Mining Investment EVENT of the North, June 4, 2024

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SAFE AND SUSTAINABLE MINING

All-Injury Frequency Rate of 1.45 (*)

• 16% lower than the U.S. average
• Reduced by 76% since 2012
• Greens Creek (0.29) and Lucky Friday (0.66) AIFR lowest in history

Small environmental footprint

• Net zero emissions in 2021, 2022, and 2023 (**)
• Low water use of 76 gallons per ounce produced

Located in two of the top three regions in the Investment Attractiveness Index (***)

• #2 Canada and #3 United States

HECLA MINING COMPANY

NYSE: HL

THE Mining Investment EVENT

of the North, June 4, 2024

~40,500

hours of safety and health training for employees and contractors

1,472

hours of environmental training company-wide

$855M

of economic impact in the

communities where we operate

* AIFR as of December 31, 2023	Safety and health training data is as of 2023, Environmental training data and economic data as of 2023
** On scope 1 & 2 emissions, and through the purchase of carbon offset credits
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*** Investment Attractiveness Index, Fraser Institute Annual Survey of Mining Companies, 2022

	HECLA MINING COMPANY
LARGEST SILVER PRODUCER IN THE U.S. & SOON, CANADA	NYSE: HL
THE Mining Investment EVENT

of the North, June 4, 2024

World Production of Silver

23%	Mexico

Three countries			Peru
produce ~48% of	48%		China
the world's silver	12%	USA

production.	ROW
	4% 13%

Hecla mines ~45%	Hecla,	Other,
of the U.S. silver
45%
production.		55%

2023 U.S. Silver Production (Moz)

14.3	Hecla is the largest silver
	producer in the U.S. and is
	positioned to be the largest in
	Canada by 2024.

6.7

3.4

2.1

Hecla

Teck

Coeur

Rio Tinto

Source: Company Reports, World Silver Survey 2024,

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LARGEST U.S./CANADA RESERVE BASE WITH HIGHEST GRADES

Silver Reserves and Reserve Grade*

HECLA MINING COMPANY NYSE: HL

THE Mining Investment EVENT of the North, June 4, 2024

Silver Reserves (Moz) in U.S. and Canada

Silver Reserves (Moz)

Silver Grade (g/t)

																					2nd highest silver reserve
																					grades, with the largest
																					reserve base in the U.S.
487																					and Canada.
	455			445
			313
						244	238	205		217
											157						109
									108
	23					15						57		56		34		10
																			35
Pan American	Fresnillo	Coeur		Hecla	Silvercorp	Endeavour	First Majestic	Hochschild	Fortuna
	Silver											Silver

Source: Company Filings	6
Hecla, Coeur, Fortuna, and Endeavour data as of December 31, 2023. First Majestic, Hochschild as of Dec 31, 2022, Silvercorp as of November 30, 2022. Pan American Silver (June 30, 2023) and Fresnillo as of May 31, 2022

LOW-COST PROFILE SILVER ASSETS

HECLA MINING COMPANY NYSE: HL

THE Mining Investment EVENT of the North, June 4, 2024

Silver AISC Curve of Hecla and Silver Peers*- 12 Months Ended December 31, 2023

US$/oz AISC

Hecla

Silver Peers*

		20.2	20.4	22.9
15.2	18.2	19.6

12.6

11.8

-

20,000

40,000

60,000

80,000

100,000

120,000

Silver Production (Kt)

Source: S&P Global Market Intelligence. Morgan Stanley	7
* Peers include Silvercrest, Coeur, Fortuna, Fresnillo, Pan American Silver, First Majestic Silver, Endeavour Silver

		HECLA MINING COMPANY
LEADING DIVIDEND POLICY WITH SILVER LINKED DIVIDEND		NYSE: HL
	THE Mining Investment EVENT
		of the North, June 4, 2024

Industry's only silver-linked dividend policy pays an annual base dividend (1.5 cents per share) plus a silver price- linked dividend that starts at $20/oz silver price.

Silver Linked Dividends

$0.200

$0.180

$0.160

$0.140

$0.120

Base Dividend per Share

Silver Linked Dividend per Share

Dividend Yield as a % of Silver Price

15.8%

14.1%

12.0%

$0.100

$0.080

8.0%

9.1%

$0.180

$0.140

$0.060

$0.040

$0.020

4.6% ~2.

$0.010

$0.040

$0.060

$0.100

$0.000

$0.015$0.015

$0.015$0.015

$0.015

$0.015

$0.015

<$20/oz

$20/oz to $25/oz

$25/oz to $30/oz

$30/oz to $35/oz

$35/oz to $40/oz

$40/oz to $45/oz

$45/oz to $50/oz

* Assumes 17Moz of silver production	8
** Dividend yield as a basis of silver price calculated as: Dividend Paid per ounce of silver/Silver Price (Average of the range, for example: $27.50/oz used for $25-$30/oz range)

GREENS CREEK: WORLD'S 11th LARGEST SILVER MINE

Since 1987, Greens Creek has:

HECLA MINING COMPANY NYSE: HL

GREENS CREEK

Mined more than -

• 21 million tons, containing 355Moz Silver, 2.9Moz, Gold, 4.1Blbs Zinc, 1.6Blbs Lead

Generated more than -

• $3.0 billion in cash flow from operations
• $2.0 billion in free cash flow
• 2023 and 2022: $122 million and $120 million in free cash flow, respectively

Continuous Improvements and Innovation:

Since 2008, when Hecla became the operator -

• 7% increase in silver recoveries since 2008 to 81%
• 25% increase in throughput to ~2,506 tons per day

Q1 2024 Performance and 2024 Guidance

		Q1 2024	2024 Guidance
Silver Produced	Moz	2.5	8.8	- 9.2
Total Cost of Sales (7)	$M	$69.9	$252
Capital Additions	$M	$8.8	$59	- $63
Cash Cost (5)	$/Ag oz	$3.45	$3.50	- $4.00
AISC (4)	$/Ag oz	$7.16	$9.50 - $10.25

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CONSISTENCY & INNOVATION →

Cumulative Cash Flow from Operations, Free

Cash Flow*

											($ Million)
										Free Cash Flow						3,026
										Cash Flow from Operations
Low-cost structure, high				2,857
grades, low capital												2,716
											2,506
requirements generate
								2,328
significant cash flow
									2,193
													2,068
													1,931
											1,799
											1,702
							1,598
							1,477
					1,304
23	161	260	372	1,063	876		974	1,014	1,059	1,139	1,238	1,320	1,422	1,577	1,757	1,855	1,974
556	758
			739	860
430	599
2006		2008		2010		2012			2014		2016		2018		2020		2022

* Free cash flow is a non-GAAP measure and reconciliation to Gross Profit (GAAP) is shown in the Appendix.

		HECLA MINING COMPANY
FREE CASH FLOW ENGINE		NYSE: HL
	GREENS CREEK

123%

Return on investment from 2008 - 2023 based on 2008 acquisition price of $758M for 70% of Greens Creek

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