EX-4.2





 Exhibit 4.2 

Execution Copy 
  

 
  

HECLA MINING COMPANY 
 AND EACH OF
THE GUARANTORS PARTY HERETO 
 7.250% SENIOR NOTES DUE 2028 

FIRST SUPPLEMENTAL INDENTURE 

Dated as of February 19, 2020 

to 
 INDENTURE 

Dated as of February 19, 2020 

THE BANK OF NEW YORK MELLON TRUST COMPANY, N.A. 

Trustee 
  

 
  












 CROSS-REFERENCE TABLE* 

 

			
	 Trust Indenture Act Section
	  	Indenture Section
	310(a)(1)	  	7.10
	(a)(2)	  	7.10
	(a)(3)	  	N.A.
	(a)(4)	  	N.A.
	(a)(5)	  	7.10
	(b)	  	7.10
	(c)	  	N.A.
	311(a)	  	7.11
	(b)	  	7.11
	(c)	  	N.A.
	312(a)	  	2.05
	(b)	  	13.03
	(c)	  	13.03
	313(a)	  	7.06
	(b)(2)	  	7.06; 7.07
	(c)	  	7.06; 13.02
	(d)	  	7.06
	314(a)	  	4.03; 13.02; 13.05
	(b)	  	N.A.
	(c)(1)	  	13.04
	(c)(2)	  	13.04
	(c)(3)	  	N.A.
	(e)	  	13.05
	(f)	  	N.A.
	315(a)	  	7.01
	(b)	  	7.05; 13.02
	(c)	  	7.01
	(d)	  	7.01
	(e)	  	6.11
	316(a) (last sentence)	  	2.09
	(a)(1)(A)	  	6.05
	(a)(1)(B)	  	6.04
	(a)(2)	  	N.A.
	(b)	  	6.07
	(c)	  	2.12
	317(a)(1)	  	6.08
	(a)(2)	  	6.09
	(b)	  	2.04
	318(a)	  	13.01
	(b)	  	N.A.
	(c)	  	13.01

 N.A. means not applicable. 

	*	 This Cross Reference Table is not part of this Supplemental Indenture. 



  
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 TABLE OF CONTENTS 
  

							
	 	  	 	  	Page	 
	 ARTICLE 1 Definitions and Incorporation by Reference
	  	 	1	 
			
	         Section 1.01.
	  	 Definitions
	  	 	1	 
	         Section 1.02.
	  	 Other Definitions
	  	 	27	 
	         Section 1.03.
	  	 Incorporation by Reference of Trust Indenture Act
	  	 	27	 
	         Section 1.04.
	  	 Rules of Construction
	  	 	28	 
	         Section 1.05.
	  	 Scope of Supplemental Indenture
	  	 	28	 
		
	 ARTICLE 2 The Notes
	  	 	29	 
			
	         Section 2.01.
	  	 Form and Dating
	  	 	29	 
	         Section 2.02.
	  	 Execution and Authentication
	  	 	29	 
	         Section 2.03.
	  	 Registrar and Paying Agent
	  	 	30	 
	         Section 2.04.
	  	 Paying Agent to Hold Money in Trust
	  	 	30	 
	         Section 2.05.
	  	 Holder Lists
	  	 	30	 
	         Section 2.06.
	  	 Transfer and Exchange
	  	 	31	 
	         Section 2.07.
	  	 Replacement Notes
	  	 	35	 
	         Section 2.08.
	  	 Outstanding Notes
	  	 	35	 
	         Section 2.09.
	  	 Treasury Notes
	  	 	35	 
	         Section 2.10.
	  	 Temporary Notes
	  	 	35	 
	         Section 2.11.
	  	 Cancellation
	  	 	36	 
	         Section 2.12.
	  	 Defaulted Interest
	  	 	36	 
	         Section 2.13.
	  	 CUSIP Numbers
	  	 	36	 
		
	 ARTICLE 3 Redemption and Prepayment
	  	 	36	 
			
	         Section 3.01.
	  	 Notices to Trustee
	  	 	36	 
	         Section 3.02.
	  	 Selection of Notes to Be Redeemed or Purchased
	  	 	37	 
	         Section 3.03.
	  	 Notice of Redemption
	  	 	37	 
	         Section 3.04.
	  	 Effect of Redemption
	  	 	38	 
	         Section 3.05.
	  	 Deposit of Redemption or Purchase Price
	  	 	38	 
	         Section 3.06.
	  	 Notes Redeemed or Purchased in Part
	  	 	39	 
	         Section 3.07.
	  	 Optional Redemption
	  	 	39	 
	         Section 3.08
	  	 Mandatory Redemption
	  	 	40	 
	         Section 3.09
	  	 Offer to Purchase by Application of Excess Proceeds
	  	 	40	 
		
	 ARTICLE 4 Covenants
	  	 	42	 
			
	         Section 4.01.
	  	 Payment of Notes
	  	 	42	 
	         Section 4.02.
	  	 Maintenance of Office or Agency
	  	 	43	 
	         Section 4.03.
	  	 Reports
	  	 	43	 
	         Section 4.04.
	  	 Compliance Certificate
	  	 	44	 
	         Section 4.05.
	  	 Taxes
	  	 	45	 
	         Section 4.06.
	  	 Stay, Extension and Usury Laws
	  	 	45	 
	         Section 4.07.
	  	 Restricted Payments
	  	 	45	 


  
 ii 














							
	         Section 4.08.
	  	 Dividend and Other Payment Restrictions Affecting Restricted Subsidiaries
	  	 	50	 

	         Section 4.09.
	  	 Incurrence of Indebtedness and Issuance of Preferred Stock
	  	 	52	 
	         Section 4.10.
	  	 Asset Sales
	  	 	56	 
	         Section 4.11.
	  	 Transactions with Affiliates
	  	 	59	 
	         Section 4.12.
	  	 Liens
	  	 	61	 
	         Section 4.13.
	  	 Business Activities
	  	 	62	 
	         Section 4.14.
	  	 Corporate Existence
	  	 	62	 
	         Section 4.15.
	  	 Offer to Repurchase Upon Change of Control
	  	 	62	 
	         Section 4.16.
	  	 Limitation on Sale and Leaseback Transactions
	  	 	64	 
	         Section 4.17.
	  	 Payments for Consent
	  	 	65	 
	         Section 4.18.
	  	 Additional Note Guarantees
	  	 	65	 
	         Section 4.19.
	  	 Designation of Restricted and Unrestricted Subsidiaries
	  	 	65	 
	         Section 4.20.
	  	 Changes in Covenants When Notes Rated Investment Grade
	  	 	66	 
		
	 ARTICLE 5 Successors
	  	 	66	 
			
	         Section 5.01.
	  	 Merger, Consolidation or Sale of Assets
	  	 	66	 
	         Section 5.02.
	  	 Successor Corporation Substituted
	  	 	67	 
		
	 ARTICLE 6 Defaults and Remedies
	  	 	68	 
			
	         Section 6.01.
	  	 Events of Default
	  	 	68	 
	         Section 6.02.
	  	 Acceleration
	  	 	70	 
	         Section 6.03.
	  	 Other Remedies
	  	 	70	 
	         Section 6.04.
	  	 Waiver of Past Defaults
	  	 	71	 
	         Section 6.05.
	  	 Control by Majority
	  	 	71	 
	         Section 6.06.
	  	 Limitation on Suits
	  	 	71	 
	         Section 6.07.
	  	 Rights of Holders of Notes to Receive Payment
	  	 	72	 
	         Section 6.08.
	  	 Collection Suit by Trustee
	  	 	72	 
	         Section 6.09.
	  	 Trustee May File Proofs of Claim
	  	 	72	 
	         Section 6.10.
	  	 Priorities
	  	 	72	 
	         Section 6.11.
	  	 Undertaking for Costs
	  	 	73	 
		
	 ARTICLE 7 Trustee
	  	 	73	 
			
	         Section 7.01.
	  	 Duties of Trustee
	  	 	73	 
	         Section 7.02.
	  	 Rights of Trustee
	  	 	74	 
	         Section 7.03.
	  	 Individual Rights of Trustee
	  	 	75	 
	         Section 7.04.
	  	 Trustee’s Disclaimer
	  	 	76	 
	         Section 7.05.
	  	 Notice of Defaults
	  	 	76	 
	         Section 7.06.
	  	 Reports by Trustee to Holders of the Notes
	  	 	76	 
	         Section 7.07.
	  	 Compensation and Indemnity
	  	 	76	 
	         Section 7.08.
	  	 Replacement of Trustee
	  	 	78	 
	         Section 7.09.
	  	 Successor Trustee by Merger, etc
	  	 	78	 
	         Section 7.10.
	  	 Eligibility; Disqualification
	  	 	79	 
	         Section 7.11.
	  	 Preferential Collection of Claims Against Company
	  	 	79	 
		
	 ARTICLE 8 Legal Defeasance and Covenant Defeasance
	  	 	79	 
			
	         Section 8.01.
	  	 Option to Effect Legal Defeasance or Covenant Defeasance
	  	 	79	 


  
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	         Section 8.02.
	  	 Legal Defeasance and Discharge
	  	 	79	 
	         Section 8.03.
	  	 Covenant Defeasance
	  	 	80	 
	         Section 8.04.
	  	 Conditions to Legal or Covenant Defeasance
	  	 	80	 
	         Section 8.05.
	  	 Deposited Money and Government Securities to be Held in Trust; Other Miscellaneous
Provisions
	  	 	81	 

	         Section 8.06.
	  	 Repayment to Company
	  	 	82	 
	         Section 8.07.
	  	 Reinstatement
	  	 	82	 
		
	 ARTICLE 9 Amendment, Supplement and Waiver
	  	 	82	 
			
	         Section 9.01.
	  	 Without Consent of Holders of Notes
	  	 	82	 
	         Section 9.02.
	  	 With Consent of Holders of Notes
	  	 	83	 
	         Section 9.03.
	  	 Compliance with Trust Indenture Act
	  	 	85	 
	         Section 9.04.
	  	 Revocation and Effect of Consents
	  	 	85	 
	         Section 9.05.
	  	 Notation on or Exchange of Notes
	  	 	85	 
	         Section 9.06.
	  	 Trustee to Sign Amendments, etc
	  	 	85	 
		
	 ARTICLE 10 Note Guarantees
	  	 	86	 
			
	         Section 10.01.
	  	 Guarantee
	  	 	86	 
	         Section 10.02.
	  	 Limitation on Guarantor Liability
	  	 	87	 
	         Section 10.03.
	  	 Execution and Delivery of Note Guarantee
	  	 	87	 
	         Section 10.04.
	  	 Guarantors May Consolidate, etc. , on Certain Terms
	  	 	88	 
	         Section 10.05.
	  	 Releases
	  	 	89	 
		
	 ARTICLE 11 Satisfaction and Discharge
	  	 	89	 
			
	         Section 11.01.
	  	 Satisfaction and Discharge
	  	 	89	 
	         Section 11.02.
	  	 Application of Trust Money
	  	 	90	 
		
	 ARTICLE 12 [Reserved]
	  	 	91	 
		
	 ARTICLE 13 Miscellaneous
	  	 	91	 
			
	         Section 13.01.
	  	 Trust Indenture Act Controls
	  	 	91	 
	         Section 13.02.
	  	 Notices
	  	 	91	 
	         Section 13.03.
	  	 Communication by Holders of Notes with Other Holders of Notes
	  	 	93	 
	         Section 13.04.
	  	 Certificate and Opinion as to Conditions Precedent
	  	 	93	 
	         Section 13.05.
	  	 Statements Required in Certificate or Opinion
	  	 	93	 
	         Section 13.06.
	  	 Rules by Trustee and Agents
	  	 	93	 
	         Section 13.07.
	  	 No Personal Liability of Directors, Officers, Employees and Stockholders
	  	 	94	 
	         Section 13.08.
	  	 Governing Law
	  	 	94	 
	         Section 13.09.
	  	 No Adverse Interpretation of Other Agreements
	  	 	94	 
	         Section 13.10.
	  	 Successors
	  	 	94	 
	         Section 13.11.
	  	 Severability
	  	 	94	 
	         Section 13.12.
	  	 Counterpart Originals
	  	 	94	 
	         Section 13.13.
	  	 Table of Contents, Headings, etc
	  	 	94	 
	         Section 13.14.
	  	 Waiver of Jury Trial
	  	 	94	 
	         Section 13.15.
	  	 Force Majeure
	  	 	95	 


  
 iv 














					
	 EXHIBITS
	  		  	
			
	 Exhibit A
	  	 –  
	  	 FORM OF NOTE

	 Exhibit B
	  	 –  
	  	 FORM OF NOTATION OF GUARANTEE

	 Exhibit C
	  	 –  
	  	 FORM OF SUPPLEMENTAL INDENTURE


  

  
 v 













 FIRST SUPPLEMENTAL INDENTURE, dated as of February 19, 2020 (this “Supplemental
Indenture”), among Hecla Mining Company, a Delaware corporation (the “Company”), the Guarantors listed on the signature pages hereto (the “Guarantors”) and The Bank of New York Mellon Trust Company, N.A.,
as trustee (the “Trustee”), to the Indenture, dated as of February 19, 2020, between the Company and the Trustee (as amended or supplemented from time to time in accordance with the terms thereof, the “Base
Indenture”). 
 WHEREAS, the Company executed and delivered the Base Indenture to the Trustee to provide, among other things, for
the issuance, from time to time, of the Company’s Securities, in an unlimited aggregate principal amount, in one or more series to be established by the Company under, and authenticated and delivered as provided in, the Base Indenture; 

WHEREAS, Section 10.01(e) of the Base Indenture provides for the Company and the Trustee to enter into supplemental indentures to the
Base Indenture to establish the form and terms of Securities of any series as permitted by Sections 2.01 and 2.02 of the Base Indenture; 

WHEREAS, the Board of Directors of the Company has duly adopted resolutions authorizing the Company to execute and deliver this Supplemental
Indenture; 
 WHEREAS, pursuant to the terms of the Base Indenture, the Company desires to establish a new series of its Securities to be
known as its “7.250% Senior Notes due 2028” (the “Notes”), the form and substance of such Notes and the terms, provisions and conditions thereof to be set forth as provided in the Base Indenture and this Supplemental
Indenture; 
 WHEREAS, the form of Note, the certificate of authentication to be borne by each Note and the form of Assignment and Transfer
contemplated under the terms of the Notes are to be substantially in the forms hereinafter provided; 
 WHEREAS, all things necessary to
make this Supplemental Indenture a legal, valid and binding indenture and, together with the Base Indenture and the Securities, a valid agreement according to its terms have been done; and 

WHEREAS, the Company and the Guarantors have requested that the Trustee execute and deliver this Supplemental Indenture. 

NOW, THEREFORE, THIS SUPPLEMENTAL INDENTURE WITNESSETH, for and in consideration of the premises and the purchases of the Notes by the Holders
thereof, it is mutually agreed, for the benefit of the Company and the Guarantors and the equal and proportionate benefit of all Holders of the Notes, as follows: 

ARTICLE 1 
 DEFINITIONS AND
INCORPORATION 
 BY REFERENCE 

Section 1.01.    Definitions. 

The terms defined in this Section 1.01 (except as herein otherwise expressly provided or unless the context of this Supplemental
Indenture otherwise requires) for all purposes of this 












 
Supplemental Indenture and of any indenture supplemental hereto that governs the Notes have the respective meanings specified in this Section 1.01. All other terms used in this Supplemental
Indenture that are defined in the Base Indenture, either directly or by reference therein (except as herein otherwise expressly provided or unless the context of this Supplemental Indenture otherwise requires), have the respective meanings assigned
to such terms in the Base Indenture as in force at the date of this Supplemental Indenture as originally executed. 
 “Acquired
Debt” means, with respect to any specified Person: 
 (1)    Indebtedness of any other Person existing at the
time such other Person is merged or consolidated with or into or became a Subsidiary of such specified Person, whether or not such Indebtedness is incurred in connection with, or in contemplation of, such other Person merging or consolidating with
or into, or becoming a Restricted Subsidiary of, such specified Person; and 
 (2)    Indebtedness secured by a Lien
encumbering any asset acquired by such specified Person at the time of such asset’s acquisition. 
 “Additional Notes”
means additional Notes (other than the Initial Notes) issued under this Supplemental Indenture in accordance with Sections 2.02 and 4.09 hereof, as part of the same series as the Initial Notes. 

“Affiliate” of any specified Person means any other Person directly or indirectly controlling or controlled by or
under direct or indirect common control with such specified Person. For purposes of this definition, “control,” as used with respect to any Person, means the possession, directly or indirectly, of the power to direct or cause the direction
of the management or policies of such Person, whether through the ownership of voting securities, by agreement or otherwise; provided that beneficial ownership of 10% or more of the Voting Stock of a Person (other than a Person eligible to
report such ownership on Schedule 13G under the Exchange Act) will be deemed to be control. For purposes of this definition, the terms “controlling,” “controlled by” and “under common control with” have correlative
meanings. 
 “Agent” means any Registrar, co-registrar, Paying Agent or additional
paying agent. 
 “Applicable Premium” means, with respect to any Note on any redemption date, the greater of: 

(1)    1.0% of the principal amount of the Note; or 

(2)    the excess of: 

(a)    the present value at such redemption date of (i) the redemption price of the Note at February 15, 2023
(such redemption price being set forth in the table appearing in Section 3.07(d) hereof) plus (ii) all required interest payments due on the Note through February 15, 2023 (excluding accrued but unpaid interest to the redemption
date), computed using a discount rate equal to the Treasury Rate as of such redemption date plus 50 basis points; over 

(b)    the principal amount of the Note. 

  
 2 













 The Applicable Premium shall be calculated by the Company. 

“Applicable Procedures” means, with respect to any transfer or exchange of or for beneficial interests in any Global Note,
the rules and procedures of the Depositary that apply to such transfer or exchange. 
 “Asset Sale” means: 

(1)    the sale, lease, conveyance or other disposition of any assets or rights by the Company or any of the
Company’s Restricted Subsidiaries; provided that the sale, lease, conveyance or other disposition of all or substantially all of the assets of the Company and its Restricted Subsidiaries taken as a whole will be governed by the
provisions of Section 4.15 hereof and/or the provisions of Section 5.01 hereof and not by the provisions of Section 4.10 hereof; and 

(2)    the issuance of Equity Interests by any of the Company’s Restricted Subsidiaries or the sale by the Company or
any of the Company’s Restricted Subsidiaries of Equity Interests in any of the Company’s Subsidiaries. 
 Notwithstanding the
preceding, none of the following items will be deemed to be an Asset Sale: 
 (1)    any single transaction or series of
related transactions that involves assets having a Fair Market Value of less than $20.0 million; 
 (2)    a
transfer of assets between or among the Company and its Restricted Subsidiaries; 
 (3)    an issuance of Equity
Interests by a Restricted Subsidiary of the Company to the Company or to a Restricted Subsidiary of the Company; 

(4)    the sale, lease or other transfer of products, services or accounts receivable in the ordinary course of business
(including sales under forward contracts) and any sale or other disposition of damaged, worn-out or obsolete assets in the ordinary course of business (including the abandonment or other disposition of
intellectual property that is, in the reasonable judgment of the Company, no longer economically practicable to maintain or useful in the conduct of the business of the Company and its Restricted Subsidiaries taken as whole); 

(5)    the licensing or sublicensing of intellectual property or other general intangibles and licenses, leases or
subleases of other property in the ordinary course of business which do not materially interfere with the business of the Company and its Restricted Subsidiaries; 

(6)    any surrender or waiver of contract rights or settlement, release, recovery on or surrender of contract, tort or
other claims in the ordinary course of business; 
 (7)    the granting of Liens not prohibited by Section 4.12
hereof; 
 (8)    the sale or other disposition of cash or Cash Equivalents; 

  
 3 













 (9)    a Restricted Payment that does not violate Section 4.07
hereof or a Permitted Investment; 
 (10)    any exchange of assets for assets (including a combination of assets (which
assets may include Capital Stock or any securities convertible into, or exercisable or exchangeable for, Capital Stock, but which assets may not include any Indebtedness) and Cash Equivalents) related to a Permitted Business of comparable or greater
market value or usefulness to the business of the Company and its Restricted Subsidiaries, taken as a whole, which in the event of an exchange of assets with a Fair Market Value in excess of (a) $15.0 million shall be evidenced by an
Officer’s Certificate and (b) $30.0 million shall be set forth in a resolution approved by at least a majority of the members of the Board of Directors of the Company; provided that the Company shall apply any cash or Cash
Equivalents received in any such exchange of assets as described in Section 4.10(b) hereof; 
 (11)    dispositions
of receivables in connection with the compromise, settlement or collection thereof in the ordinary course of business or in bankruptcy or similar proceedings and exclusive of factoring or similar arrangements; 

(12)    the issuance by a Restricted Subsidiary of preferred stock that is permitted by Section 4.09 hereof; 

(13)    any sale of Capital Stock or Indebtedness or other securities of an Unrestricted Subsidiary; 

(14)    sales of assets received by the Company or any Restricted Subsidiary upon foreclosures on a Lien; 

(15)    the unwinding of any Hedging Obligations (including sales under forward contracts); 

(16)    any dispositions to the extent required by, or made pursuant to, customary buy/sell arrangements between the joint
venture parties set forth in joint venture arrangements and similar binding agreements; 
 (17)    the lease or sublease
of office space; 
 (18)    the abandonment, farm-out, lease, assignment, sub-lease, license or sub-license of any real or personal property in the ordinary course of business; 

(19)    with respect to dispositions of precious metals pursuant to a royalty or precious metals streaming agreement or
similar transaction, payments made to the Company or a Restricted Subsidiary directly in respect of minerals or mineral credits delivered to the counterparty of such agreement pursuant to the terms of such agreement (excluding any front-end payments or deposits payable thereunder); and 
 (20)    dispositions of
receivables in connection with the compromise, settlement or collection thereof in the ordinary course of business or in bankruptcy or similar proceedings and exclusive of factoring or similar arrangements. 

  
 4 













 “Attributable Debt” in respect of a sale and leaseback transaction means,
at the time of determination, the present value of the obligation of the lessee for net rental payments during the remaining term of the lease included in such sale and leaseback transaction including any period for which such lease has been
extended or may, at the option of the lessor, be extended. Such present value shall be calculated using a discount rate equal to the rate of interest implicit in such transaction, determined in accordance with GAAP; provided, however,
that if such sale and leaseback transaction results in a Capital Lease Obligation, the amount of Indebtedness represented thereby will be determined in accordance with the definition of “Capital Lease Obligation.” 

“Bankruptcy Law” means Title 11, U.S. Code or any similar federal or state law for the relief of debtors. 

“Beneficial Owner” has the meaning assigned to such term in Rule 13d-3 and Rule 13d-5 under the Exchange Act, except that in calculating the beneficial ownership of any particular “person” (as that term is used in Section 13(d)(3) of the Exchange Act), such “person”
will be deemed to have beneficial ownership of all securities that such “person” has the right to acquire by conversion or exercise of other securities, whether such right is currently exercisable or is exercisable only after the passage
of time. The terms “Beneficially Owns” and “Beneficially Owned” have a corresponding meaning. 

“Board of Directors” means: 

(1)    with respect to a corporation, the board of directors of the corporation or any committee thereof duly authorized
to act on behalf of such board; 
 (2)    with respect to a partnership, the Board of Directors of the general partner
of the partnership; 
 (3)    with respect to a limited liability company, the managing member or members or any
controlling committee of managing members thereof or if such limited liability company is manager-managed, the managers thereof or any committee of Persons constituting the manager thereof; and 

(4)    with respect to any other Person, the board or committee of such Person serving a similar function. 

“Business Day” means any day other than a Legal Holiday. 

“Capital Lease Obligation” means, at the time any determination is to be made, the amount of the liability in respect of a
capital lease that would at that time be required to be capitalized on a balance sheet prepared in accordance with GAAP, and the Stated Maturity thereof shall be the date of the last payment of rent or any other amount due under such lease prior to
the first date upon which such lease may be prepaid or terminated by the lessee without payment of a penalty. 

  
 5 













 “Capital Stock” means: 

(1)    in the case of a corporation, corporate stock; 

(2)    in the case of an association or business entity, any and all shares, interests, participations, rights or other
equivalents (however designated) of corporate stock; 
 (3)    in the case of a partnership or limited liability
company, partnership interests (whether general or limited) or membership interests; and 
 (4)    any other interest or
participation that confers on a Person the right to receive a share of the profits and losses of, or distributions of assets of, the issuing Person, but excluding from all of the foregoing any debt securities convertible into Capital Stock, whether
or not such debt securities include any right of participation with Capital Stock. 
 “Cash Equivalents” means: 

(1)    United States dollars, Canadian dollars and Mexican pesos or such other local currencies held by the Company and
its Subsidiaries, or in a demand deposit account in the name of the Company or any Subsidiary, from time to time in the ordinary course of business; 

(2)    securities issued or directly and fully guaranteed or insured by the United States or Canadian government or any
agency or instrumentality of the United States or Canadian government (provided that the full faith and credit of the United States or Canada, as the case may be, is pledged in support of those securities) having maturities of not more than
one year from the date of acquisition; 
 (3)    certificates of deposit and eurodollar time deposits with maturities of
six months or less from the date of acquisition and bankers’ acceptances with maturities not exceeding six months, in each case, with any lender party to the Senior Credit Facility or with any commercial bank the long-term debt of which is
rated at the time of acquisition thereof at least “A” or better by either S&P or Moody’s, or carrying the equivalent rating by a nationally recognized rating agency, if both of the two named rating agencies cease publishing
ratings of investments generally, and having combined capital and surplus in excess of $500.0 million (or its foreign currency equivalent); provided that Cash Equivalents may include certificates of deposit and eurodollar time deposits
at a commercial bank that does not meet the ratings or capital requirements set forth above, in an aggregate amount at any time outstanding, not to exceed, as of any date of calculation, $1.0 million; 

(4)    repurchase obligations with a term of not more than seven days for underlying securities of the types described in
clauses (2) and (3) above entered into with any financial institution meeting the qualifications specified in clause (3) above; 

(5)    commercial paper having one of the two highest ratings obtainable from Moody’s or S&P, or carrying the
equivalent rating by a nationally recognized rating agency, if both of the two named rating agencies cease publishing ratings of investments and, in each case, maturing within one year after the date of acquisition; and 

  
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 (6)    money market funds, the investment policies of which require at
least 95% of the assets of which constitute Cash Equivalents of the kinds described in clauses (1) through (5) of this definition. 

“Change of Control” means the occurrence of any of the following: 

(1)    the sale, lease, transfer, conveyance or other disposition (other than by way of merger or consolidation), in one
or a series of related transactions, of all or substantially all of the properties or assets of the Company and its Subsidiaries taken as a whole to any Person (including any “person” (as that term is used in Section 13(d)(3) of the
Exchange Act)); 
 (2)    the adoption of a plan relating to the liquidation or dissolution of the Company; 

(3)    the consummation of any transaction (including, without limitation, any merger or consolidation), the result of
which is that any Person (including any “person” (as defined above)) becomes the Beneficial Owner, directly or indirectly, of more than 50% of the Voting Stock of the Company, measured by voting power rather than number of shares; or 

(4)    the first day on which a majority of the members of the Board of Directors of the Company are not Continuing
Directors. 
 “Company” means Hecla Mining Company, a Delaware corporation, and any successor obligor to its obligations
under this Supplemental Indenture and the Notes. 
 “Consolidated EBITDA” means, with respect to any specified Person for
any period, the Consolidated Net Income of such Person for such period plus, without duplication: 

(1)    provision for taxes based on income or profits of such Person and its Restricted Subsidiaries for such period, to
the extent that such provision for taxes was deducted in computing such Consolidated Net Income; plus 

(2)    the Fixed Charges of such Person and its Restricted Subsidiaries for such period, to the extent that such Fixed
Charges were deducted in computing such Consolidated Net Income; plus 
 (3)    any foreign currency translation
losses (including losses related to currency remeasurements of Indebtedness) of such Person and its Restricted Subsidiaries for such period, to the extent that such losses were taken into account in computing such Consolidated Net Income;
plus 
 (4)    depreciation, amortization (including amortization of intangibles but excluding amortization of
prepaid cash expenses that were paid in a prior period) and other non-cash charges and expenses (excluding any such non-cash charge or expense to the extent that it
represents an accrual of or reserve for cash charges or expenses in any future period or amortization of a prepaid cash charge or expense that was paid in a prior period) of such Person and its Restricted Subsidiaries for such period to the extent
that such depreciation, amortization and other non-cash charges or expenses were deducted in computing such Consolidated Net Income; plus 

  
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 (5)    all unusual or
non-recurring charges or expenses and all restructuring charges; minus 

(6)    any foreign currency translation gains (including gains related to currency remeasurements of Indebtedness) of such
Person and its Restricted Subsidiaries for such period, to the extent that such gains were taken into account in computing such Consolidated Net Income; minus 

(7)    non-cash items increasing such Consolidated Net Income for such period,
other than the accrual of revenue in the ordinary course of business; plus 
 (8)    losses (and minus
gains) on Assets Sales, disposals or abandonments; plus 
 (9)    all costs incurred in connection with
(a) the offering of the Notes and (b) the tender offer for, or the redemption and defeasance of, the Company’s 6.875% Senior Notes due 2021 and the satisfaction and discharge of the indenture governing such notes; plus 

(10)    any expenses or charges (other than depreciation, amortization or depletion expense) related to any Equity
Offering, Permitted Investment, merger, amalgamation, consolidation, arrangement, acquisition, disposition, recapitalization or the incurrence of Indebtedness permitted to be incurred by this Supplemental Indenture (including a refinancing thereof)
(whether or not successful); plus 
 (11)    losses from discontinued operations; 

in each case, on a consolidated basis and determined in accordance with GAAP. 

“Consolidated Net Income” means, with respect to any specified Person for any period, the aggregate of the net income (loss)
of such Person and its Restricted Subsidiaries for such period, on a consolidated basis (excluding the net income (and loss) of any Unrestricted Subsidiary of such Person), determined in accordance with GAAP and without any reduction in respect of
preferred stock dividends; provided that: 
 (1)    all extraordinary gains and losses and all gains and losses
realized in connection with any Asset Sale or the disposition of securities or the early extinguishment of Indebtedness, together with any related provision for taxes on any such gain or loss, will be excluded; 

(2)    the net income (and loss) of any Person that is not a Restricted Subsidiary or that is accounted for by the equity
method of accounting will be included only to the extent of the amount of dividends or similar distributions paid in cash to the specified Person or a Restricted Subsidiary of the Person; 

(3)    solely for the purpose of determining the amount available for Restricted Payments under Section 4.07
(a)(3)(A) hereof, the net income (and loss) of any Restricted Subsidiary will be excluded to the extent that the declaration or payment of dividends or similar distributions by that Restricted Subsidiary of that net income is not at the date of
determination permitted without any prior governmental approval (that has not been obtained) or, directly or indirectly, by operation of the terms of its charter or any agreement, instrument, judgment,


  
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decree, order, statute, rule or governmental regulation applicable to that Restricted Subsidiary or its stockholders; provided that Consolidated Net Income of such Person shall be
increased by the amount of dividends or distributions or other payments that are actually paid in cash (or to the extent converted into cash) by such Person to the Company or another Restricted Subsidiary thereof in respect of such period, to the
extent not already included therein; 
 (4)    the cumulative effect of a change in accounting principles will be
excluded; 
 (5)    non-cash gains and losses attributable to movement in the mark-to-market valuation of Hedging Obligations pursuant to Financial Accounting Standards Board Statement No. 133 will be excluded; 

(6)    any amortization of deferred charges resulting from the application of Accounting Standards Codification 470-20—Debt With Conversion and Other Options will be excluded; 
 (7)    any
impairment charge or asset write-off, including, without limitation, impairment charges or asset write-offs related to intangible assets, long-lived assets or investments in debt and equity securities, in each
case pursuant to GAAP, will be excluded; 
 (8)    any non-cash compensation
expense recorded from grants of stock appreciation or similar rights, stock options, restricted stock or other rights to officers, director or employees will be excluded; 

(9)    any income (loss) for such period attributable to the early extinguishment of Indebtedness, Hedging Obligations
(other than Hedging Obligations associated with the Company’s concentrate shipments) or other derivative instruments will be excluded; and 

(10)    the effects of adjustments in the inventory, property and equipment, software, goodwill, other intangible assets
and in process research and development, deferred revenue and debt line items in such Person’s consolidated financial statements pursuant to GAAP resulting from the application of purchase accounting in relation to any consummated acquisition
after the date of this Supplemental Indenture or the amortization or write-off of any amounts thereof, net of taxes, will be excluded, as will impairment charges whether or not derived therefrom. 

“Consolidated Net Tangible Assets” means, as of any date, the total consolidated assets of the Company and its Restricted
Subsidiaries, as shown on the most recent consolidated balance sheet of the Company that is available internally, minus all current liabilities of the Company and its Restricted Subsidiaries reflected on such consolidated balance sheet and minus
total goodwill and other intangible assets of the Company and its Restricted Subsidiaries reflected on such consolidated balance sheet, all calculated on a consolidated basis in accordance with GAAP; provided that, for purposes of calculating
“Consolidated Net Tangible Assets” for purposes of testing the covenants under this Supplemental Indenture in connection with any transaction, the total consolidated assets, current liabilities, total goodwill and other intangible assets
of the Company and its Restricted Subsidiaries shall be adjusted to reflect any acquisitions and dispositions of assets that have occurred during the period from the date of the applicable balance sheet through the applicable date of determination,
including any such transactions occurring on the date of determination. 

  
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 “continuing” means, with respect to any Default or Event of Default,
that such Default or Event of Default has not been cured or waived. 
 “Continuing Directors” means, as of any date of
determination, any member of the Board of Directors of the Company who: 
 (1)    was a member of such Board of
Directors on the date of this Supplemental Indenture; or 
 (2)    was nominated for election or elected to such Board
of Directors with the approval of a majority of the Continuing Directors who were members of such Board of Directors at the time of such nomination or election. 

“Corporate Trust Office of the Trustee” means the principal office of the Trustee at which at any time its corporate trust
business shall be administered, which office at the date hereof is located at 400 South Hope Street, Suite 500, Los Angeles, California, 90071, Attention: Corporate Unit, or such other address as the Trustee may designate from time to time by notice
to the Holders and the Company, or the principal corporate trust office of any successor Trustee (or such other address as such successor Trustee may designate from time to time by notice to the Holders and the Company). 

“Credit Facilities” means, one or more debt facilities (including, without limitation, the Senior Credit Facility) or other
financing arrangements (including, without limitation, commercial paper facilities, indentures or debt security or note issuances), in each case, with banks, investment banks, insurance companies, mutual funds or other institutional lenders or
investors providing for revolving credit loans, term loans, receivables financing (including through the sale of receivables to such lenders or to special purpose entities formed to borrow from such lenders against such receivables), letters of
credit, other borrowings, debt securities or note issuances, in each case, as amended, restated, exchanged, extended, modified, renewed, refunded, replaced in any manner (whether upon or after termination or otherwise) or refinanced (including by
means of sales of debt securities to institutional investors) in whole or in part from time to time. 
 “Custodian” means
the Trustee, as custodian with respect to the Notes in global form, or any successor entity thereto. 
 “Deemed Capitalized
Leases” means obligations of the Company or any Restricted Subsidiary of the Company that are classified as “capital lease obligations” under GAAP due to the application of ASC Topic 840 or any subsequent pronouncement having
similar effect and, except for such regulation or pronouncement, such obligation would not constitute a Capital Lease Obligation. 

“Default” means any event that is, or with the passage of time or the giving of notice or both would be, an Event of Default.

 “Definitive Note” means a certificated Note registered in the name of the Holder thereof and issued in accordance with
Section 2.06 hereof, substantially in the form of Exhibit A hereto except that such Note shall not bear the Global Note Legend and shall not have the “Schedule of Exchanges of Interests in the Global Note” attached thereto. 

  
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 “Depositary” means, with respect to the Notes issuable or issued in whole
or in part in global form, the Person specified in Section 2.03 hereof as the Depositary with respect to the Notes, and any and all successors thereto appointed as depositary hereunder and having become such pursuant to the applicable provision
of this Supplemental Indenture. 
 “Designated Non-cash Consideration” means the
Fair Market Value of non-cash consideration received by the Company or any of its Restricted Subsidiaries in connection with an Asset Sale that is designated as “Designated
Non-cash Consideration” pursuant to an Officer’s Certificate, setting forth the basis of such valuation, less the amount of cash or Cash Equivalents received in connection with a subsequent sale,
redemption or payment of, on or with respect to such Designated Non-cash Consideration. 

“Disqualified Stock” means any Capital Stock that, by its terms (or by the terms of any security into which it is
convertible, or for which it is exchangeable, in each case, at the option of the holder of the Capital Stock), or upon the happening of any event, matures or is mandatorily redeemable, pursuant to a sinking fund obligation or otherwise, or
redeemable at the option of the holder of the Capital Stock, in whole or in part, on or prior to the date that is 91 days after the date on which the Notes mature. Notwithstanding the preceding sentence, any Capital Stock that would constitute
Disqualified Stock solely because the holders of the Capital Stock have the right to require the Company to repurchase such Capital Stock upon the occurrence of a change of control or an asset sale will not constitute Disqualified Stock if the terms
of such Capital Stock provide that the Company may not repurchase or redeem any such Capital Stock pursuant to such provisions unless such repurchase or redemption complies with Section 4.07 hereof. The amount of Disqualified Stock deemed to be
outstanding at any time for purposes of this Supplemental Indenture will be the maximum amount that the Company and its Restricted Subsidiaries may become obligated to pay upon the maturity of, or pursuant to any mandatory redemption provisions of,
such Disqualified Stock, exclusive of accrued dividends, expenses and indemnification obligations. 
 “Equity Interests”
means Capital Stock and all warrants, options or other rights to acquire Capital Stock (but excluding any debt security that is convertible into, or exchangeable for, Capital Stock prior to its conversion or exchange). 

“Equity Offering” means a public or private sale for cash either (1) of Equity Interests of the Company by the Company
(other than Disqualified Stock and other than to a Subsidiary of the Company) or (2) of Equity Interests of a direct or indirect parent entity of the Company (other than to the Company or a Subsidiary of the Company) to the extent that the net
proceeds therefrom are contributed to the common equity capital of the Company. 
 “Exchange Act” means the Securities
Exchange Act of 1934, as amended. 
 “Existing Indebtedness” means all Indebtedness of the Company and its Subsidiaries
(other than the Senior Credit Facility and Indebtedness described in clauses (3), (4), (6), (7), (8), (9), (10), (11), (12) or (13) of Section 4.09(b) hereof) in existence on the date of this Supplemental Indenture, until such amounts are
repaid. 

  
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 “Fair Market Value” means the value that would be paid by a willing buyer
to an unaffiliated willing seller in a transaction not involving distress or necessity of either party. Fair Market Value shall be conclusively determined in good faith by (i) the Company’s Board of Directors and set forth in a resolution
of the Company’s Board of Directors or (ii) if an Officer of the Company determines in good faith that the Fair Market Value is less than $50.0 million, an Officer of the Company and set forth in an Officer’s Certificate. 

“Fixed Charge Coverage Ratio” means with respect to any specified Person for any period, the ratio of the Consolidated EBITDA
of such Person for such period to the Fixed Charges of such Person for such period. In the event that the specified Person or any of its Restricted Subsidiaries incurs, assumes, guarantees, repays, repurchases, redeems, defeases or otherwise
discharges any Indebtedness (other than ordinary working capital borrowings) or issues, repurchases or redeems preferred stock subsequent to the commencement of the period for which the Fixed Charge Coverage Ratio is being calculated and on or prior
to the date on which the event for which the calculation of the Fixed Charge Coverage Ratio is made (the “Calculation Date”), then the Fixed Charge Coverage Ratio will be calculated giving pro forma effect (determined in accordance
with Regulation S-X under the Securities Act, but including any Pro Forma Cost Savings) to such incurrence, assumption, Guarantee, repayment, repurchase, redemption, defeasance or other discharge of
Indebtedness, or such issuance, repurchase or redemption of preferred stock, and the use of the proceeds therefrom, as if the same had occurred at the beginning of the applicable four-quarter reference period. 

In addition, for purposes of calculating the Fixed Charge Coverage Ratio: 

(1)    acquisitions that have been made by the specified Person or any of its Restricted Subsidiaries, including through
mergers or consolidations, or any Person or any of its Restricted Subsidiaries acquired by the specified Person or any of its Restricted Subsidiaries, and including all related financing transactions and including increases in ownership of
Restricted Subsidiaries, during the four-quarter reference period or subsequent to such reference period and on or prior to the Calculation Date, or that are to be made on the Calculation Date, will be given pro forma effect (in accordance with
Regulation S-X under the Securities Act, but including all Pro Forma Cost Savings) as if they had occurred on the first day of the four-quarter reference period; 

(2)    the Consolidated EBITDA attributable to discontinued operations, as determined in accordance with GAAP, and
operations or businesses (and ownership interests therein) disposed of prior to the Calculation Date, will be excluded; 

(3)    the Fixed Charges attributable to discontinued operations, as determined in accordance with GAAP, and operations or
businesses (and ownership interests therein) disposed of prior to the Calculation Date, will be excluded, but only to the extent that the obligations giving rise to such Fixed Charges will not be obligations of the specified Person or any of its
Restricted Subsidiaries following the Calculation Date; 

  
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 (4)    any Person that is a Restricted Subsidiary on the Calculation
Date will be deemed to have been a Restricted Subsidiary at all times during such four-quarter period; 
 (5)    any
Person that is not a Restricted Subsidiary on the Calculation Date will be deemed not to have been a Restricted Subsidiary at any time during such four-quarter period; and 

(6)    if any Indebtedness bears a floating rate of interest, the interest expense on such Indebtedness will be calculated
as if the rate in effect on the Calculation Date had been the applicable rate for the entire period (taking into account any Hedging Obligation applicable to such Indebtedness if such Hedging Obligation has a remaining term as at the Calculation
Date in excess of 12 months). 
 “Fixed Charges” means, with respect to any specified Person for any period, the sum,
without duplication, of: 
 (1)    the consolidated interest expense of such Person and its Restricted Subsidiaries for
such period, whether paid or accrued, including, without limitation, amortization of debt issuance costs and original issue discount, non-cash interest payments (other than any
non-cash interest income or expense attributable to the movement in the mark-to-market valuation of Hedging Obligations or other
derivative instruments pursuant to GAAP), the interest component of any deferred payment obligations, the interest component of all payments associated with Capital Lease Obligations (but excluding any interest expense attributable to Deemed
Capitalized Leases), imputed interest with respect to Attributable Debt, commissions, discounts and other fees and charges incurred in respect of letter of credit or bankers’ acceptance financings, and net of the effect of all payments made or
received pursuant to Hedging Obligations in respect of interest rates; plus 
 (2)    the consolidated interest
expense of such Person and its Restricted Subsidiaries that was capitalized during such period; plus 

(3)    any interest on Indebtedness of another Person that is guaranteed by such Person or one of its Restricted
Subsidiaries or secured by a Lien on assets of such Person or one of its Restricted Subsidiaries, whether or not such Guarantee or Lien is called upon; plus 

(4)    the product of (a) all dividends, whether paid or accrued and whether or not in cash, on any series of
preferred stock of such Person or any of its Restricted Subsidiaries, other than dividends on Equity Interests payable solely in Equity Interests of the Company (other than Disqualified Stock) or to the Company or a Restricted Subsidiary of the
Company, times (b) a fraction, the numerator of which is one and the denominator of which is one minus the then current combined federal, state and local statutory tax rate of such Person, expressed as a decimal, in each case, determined
on a consolidated basis in accordance with GAAP; plus 
 (5)    any amortization of deferred charges resulting
from the application of Accounting Standards Codification 470-20—Debt With Conversion and Other Options that may be settled in cash upon conversion (including partial cash settlement). 

“GAAP” means United States generally accepted accounting principles set forth in the opinions and pronouncements of the
Accounting Principles Board of the American Institute of 

  
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Certified Public Accountants and statements and pronouncements of the Financial Accounting Standards Board or in such other statements by such other entity as have been approved by a significant
segment of the accounting profession, which are in effect from time to time. 
 “Global Note Legend” means the legend set
forth in Section 2.06(f) hereof, which is required to be placed on all Global Notes issued under this Supplemental Indenture. 

“Global Notes” means, individually and collectively, each of the Global Notes deposited with or on behalf of and registered
in the name of the Depositary or its nominee, substantially in the form of Exhibit A hereto and that bears the Global Note Legend and that has the “Schedule of Exchanges of Interests in the Global Note” attached thereto, issued in
accordance with Section 2.01, 2.06(b) or 2.06(d) hereof. 
 “Government Securities” means securities that are: 

(1)    direct obligations of the United States of America for the timely payment of which its full faith and credit is
pledged; or 
 (2)    obligations of a Person controlled or supervised by and acting as an agency or instrumentality of
the United States of America, the timely payment of which is unconditionally guaranteed as a full faith and credit obligation by the United States of America, 

which, in either case, are not callable or redeemable at the option of the issuers thereof, and shall also include a depositary receipt issued by a bank (as
defined in Section 3(a)(2) of the Securities Act), as custodian with respect to any such Government Securities or a specific payment of principal of or interest on any such Government Securities held by such custodian for the account of the
holder of such depositary receipt; provided that (except as required by law) such custodian is not authorized to make any deduction from the amount payable to the holder of such depositary receipt from any amount received by the custodian in
respect of the Government Securities or the specific payment of principal of or interest on the Government Securities evidenced by such depositary receipt. 

“Guarantee” means a guarantee other than by endorsement of negotiable instruments for collection in the ordinary course of
business, direct or indirect, in any manner including, without limitation, by way of a pledge of assets or through letters of credit or reimbursement agreements in respect thereof, of all or any part of any Indebtedness (whether arising by virtue of
partnership arrangements, or by agreements to keep-well, to purchase assets, goods, securities or services, to take or pay or to maintain financial statement conditions or otherwise). 

“Guarantors” means any Subsidiary of the Company that executes a Note Guarantee in accordance with the provisions of this
Supplemental Indenture, and their respective successors and assigns, in each case, until the Note Guarantee of such Person has been released in accordance with the provisions of this Supplemental Indenture. 

  
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 “Hedging Obligations” means, with respect to any specified Person, the
obligations of such Person under: 
 (1)    interest rate swap agreements (whether from fixed to floating or from
floating to fixed), interest rate cap agreements and interest rate collar agreements; 
 (2)    commodity futures or
forward contracts, commodity swaps and commodity options; 
 (3)    other agreements or arrangements designed to manage
interest rates or interest rate risk; and 
 (4)    other agreements or arrangements designed to protect such Person
against fluctuations in currency exchange rates or commodity prices or availability (including both physical and financial settlement transactions). 

“Holder” means a Person in whose name a Note is registered. 

“Indebtedness” means, with respect to any specified Person, any indebtedness of such Person (excluding accrued expenses and
trade payables), whether or not contingent: 
 (1)    in respect of borrowed money; 

(2)    evidenced by bonds, notes, debentures or similar instruments or letters of credit (or reimbursement agreements in
respect thereof); 
 (3)    in respect of banker’s acceptances; 

(4)    representing Capital Lease Obligations or Attributable Debt in respect of sale and leaseback transactions; 

(5)    representing the balance deferred and unpaid of the purchase price of any property or services due more than six
months after such property is acquired or such services are completed; or 
 (6)    representing any net obligation
under any Hedging Obligations, 
 if and to the extent any of the preceding items (other than letters of credit, Attributable Debt and Hedging Obligations)
would appear as a liability upon a balance sheet of the specified Person prepared in accordance with GAAP, but excluding Deemed Capitalized Leases. In addition, the term “Indebtedness” includes all Indebtedness of others secured by a Lien
on any asset of the specified Person (whether or not such Indebtedness is assumed by the specified Person) and, to the extent not otherwise included, the Guarantee by the specified Person of any Indebtedness of any other Person. Indebtedness shall
be calculated without giving effect to the effects of Statement of Financial Accounting Standards No. 133 and related interpretations to the extent such effects would otherwise increase or decrease an amount of Indebtedness for any purpose
under this Supplemental Indenture as a result of accounting for any embedded derivatives created by the terms of such Indebtedness. Notwithstanding the foregoing, money borrowed and set aside at the time of the incurrence of any Indebtedness in
order to pre-fund the payment of interest on such Indebtedness shall not be deemed to be “Indebtedness”; provided that such money is held to secure the payment of such interest. 

  
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 In addition, “Indebtedness” of the Company and its Restricted Subsidiaries shall
include (without duplication) Indebtedness described in the preceding paragraph that would not appear as a liability on the balance sheet of the Company and its Restricted Subsidiaries if: 

(1)    such Indebtedness is the obligation of a partnership or joint venture that is not a Subsidiary of the Company (a
“Joint Venture”); 
 (2)    the Company or any of its Restricted Subsidiaries is a general partner of
the Joint Venture (a “General Partner”); and 
 (3)    there is recourse, by contract or operation of
law, with respect to the payment of such Indebtedness to property or assets of the Company or any of its Restricted Subsidiaries; and then such Indebtedness shall be included in an amount not to exceed: 

(a)    the lesser of (i) the net assets of the General Partner and (ii) the amount of such obligations to the
extent that there is recourse, by contract or operation of law, to the property or assets of the Company or any of its Restricted Subsidiaries; or 

(b)    if less than the amount determined pursuant to clause (a) immediately above, the actual amount of such
Indebtedness that is recourse to the Company or any of its Restricted Subsidiaries, if the Indebtedness is evidenced by a writing and is for a determinable amount. 

“Indenture” means this Supplemental Indenture, together with the Base Indenture, as amended or supplemented from time to
time. 
 “Indirect Participant” means a Person who holds a beneficial interest in a Global Note through a Participant. 

“Initial Notes” means the first $475.0 million aggregate principal amount of Notes issued under this Supplemental
Indenture on the date hereof. 
 “Investments” means, with respect to any Person, all direct or indirect investments by
such Person in other Persons (including Affiliates) in the forms of loans (including Guarantees or other obligations), advances or capital contributions (excluding commission, travel and similar advances to officers and employees made in the
ordinary course of business and any advance payments made to vendors of goods or services used in the ordinary course of business that are made prior to the delivery of the applicable good or service), purchases or other acquisitions for
consideration of Indebtedness, Equity Interests or other securities, together with all items that are or would be classified as investments on a balance sheet prepared in accordance with GAAP. If the Company or any Restricted Subsidiary of the
Company sells or otherwise disposes of any Equity Interests of any direct or indirect Restricted Subsidiary of the Company such that, after giving effect to any such sale or disposition, such Person is no longer a Restricted Subsidiary of the
Company, the Company will be deemed to have made an Investment on the date of any such sale or disposition equal to the Fair Market Value of the Company’s Investments in such Subsidiary that were not sold or disposed of in an amount determined
as provided in Section 4.07(c) hereof. The acquisition by the Company or any Restricted Subsidiary of the Company of a Person that holds an Investment in a third Person will be deemed to be an Investment by the Company or such Restricted
Subsidiary in such third Person in an amount equal to the Fair 

  
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Market Value of the Investments held by the acquired Person in such third Person in an amount determined as provided in Section 4.07(c) hereof. Except as otherwise provided in this
Supplemental Indenture, the amount of an Investment will be determined at the time the Investment is made and without giving effect to subsequent changes in value. 

“Issue Date” means February 19, 2020. 

“Legal Holiday” means a Saturday, a Sunday or a day on which banking institutions in the City of New York or at a place of
payment are authorized by law, regulation or executive order to remain closed. If a payment date is a Legal Holiday at a place of payment, payment may be made at that place on the next succeeding day that is not a Legal Holiday, and no interest
shall accrue on such payment for the intervening period. 
 “Lien” means, with respect to any asset, any mortgage, lien,
pledge, charge, security interest or encumbrance of any kind in respect of such asset, whether or not filed, recorded or otherwise perfected under applicable law, including any conditional sale or other title retention agreement, any lease in the
nature thereof, any option or other agreement to sell or give a security interest in and any filing of or agreement to give any financing statement under the Uniform Commercial Code (or equivalent statutes) of any jurisdiction. 

“Moody’s” means Moody’s Investors Service, Inc. 

“Net Proceeds” means the aggregate cash proceeds and Cash Equivalents received by the Company or any of its Restricted
Subsidiaries in respect of any Asset Sale (including, without limitation, any cash or Cash Equivalents received upon the sale or other disposition of any non-cash consideration received in any Asset Sale, but
excluding any royalty payments or other future stream of payments relating to precious metals), net of the direct costs relating to such Asset Sale, including, without limitation, legal, accounting and investment banking fees, and sales commissions,
and any relocation expenses incurred as a result of the Asset Sale, and taxes paid or payable as a result of the Asset Sale, in each case, after taking into account any available tax credits or deductions and any tax sharing arrangements, and any
reserve for adjustment or indemnification obligations in respect of the sale price of such asset or assets established by the Company or such Restricted Subsidiary in good faith. 

“Non-Recourse Debt” means Indebtedness: 

(1)    as to which neither the Company nor any of its Restricted Subsidiaries (a) provides credit support of any kind
(including any undertaking, agreement or instrument that would constitute Indebtedness) or (b) is directly or indirectly liable as a guarantor or otherwise; and 

(2)    as to which the lenders have been notified in writing that they will not have any recourse to the stock or assets
of the Company or any of its Restricted Subsidiaries (other than the Equity Interests of an Unrestricted Subsidiary). 
 “Note
Guarantee” means the Guarantee by each Guarantor of the Company’s obligations under this Supplemental Indenture and the Notes, executed pursuant to the provisions of this Supplemental Indenture. 

  
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 “Notes” has the meaning assigned to it in the preamble to this Supplemental
Indenture. The Initial Notes and the Additional Notes shall be treated as a single class for all purposes under this Supplemental Indenture, and unless the context otherwise requires, all references to the Notes shall include the Initial Notes in
respect thereof and any Additional Notes. 
 “Obligations” means any principal, interest, penalties, fees,
indemnifications, reimbursements, damages and other liabilities payable under the documentation governing any Indebtedness. 

“Officer” means the Chairman of the Board, the Chief Executive Officer, the President, the Chief Financial Officer, any Vice
President, the Treasurer or an Assistant Treasurer, or the Secretary of the Company or an Assistant Secretary, except that with respect to any annual compliance certificate delivered pursuant to this Supplemental Indenture, such term means only the
Chief Executive Officer, the Chief Financial Officer, or the Chief Accounting Officer of the Company. 
 “Officer’s
Certificate” means a certificate signed by an Officer of the Company that meets the requirements of Section 13.05 hereof. 

“Opinion of Counsel” means an opinion from legal counsel who is reasonably acceptable to the Trustee, that meets the
requirements of Section 13.05 hereof. The counsel may be an employee of or counsel to the Company or any Subsidiary of the Company. 

“Participant” means, with respect to the Depositary, a Person who has an account with the Depositary. 

“Permitted Business” means: 

(1)    the acquisition, exploration, development, operation and disposition of mining and precious or base metal
processing properties and assets; 
 (2)    any of the businesses in which the Company and its Restricted Subsidiaries
are engaged on the date of this Supplemental Indenture; and 
 (3)    any other business that is the same as, or
reasonably related, ancillary or complementary to, the businesses described in clauses (1) and (2) above. 
 “Permitted
Business Investments” means Investments made in (A) the ordinary course of, or of a nature that are customary in, the mining business as a means of exploiting, exploring for, acquiring, developing, processing, gathering, producing,
transporting or marketing gold, silver or other precious or base metals and metal by-products used, useful or created in the mining business, including through agreements, acquisitions, transactions, interests
or arrangements which permit one to share (or have the effect of sharing) risks or costs, comply with regulatory requirements regarding ownership or satisfy other customary objectives in the mining business, and in any event including, without
limitation, Investments made in connection with or in the form of (i) direct or indirect ownership interests in mining properties, gathering or upgrading systems or facilities and (ii) operating agreements, development agreements, area of
mutual interest agreements, pooling agreements, service contracts, joint venture agreements, partnership 

  
 18 













 
or limited liability company agreements (whether general or limited), or other similar or customary agreements, transactions, properties, interests or arrangements, and Investments and
expenditures in connection therewith or pursuant thereto; and (B) Persons engaged in a Permitted Business. 
 “Permitted
Investments” means: 
 (1)     any Investment in the Company or in a Restricted Subsidiary of the Company; 

(2)     any Investment in Cash Equivalents; 

(3)     any Investment by the Company or any Restricted Subsidiary of the Company in a Person, if as a result of such
Investment: 
 (a)    such Person becomes a Restricted Subsidiary of the Company; or 

(b)    such Person is merged, consolidated or amalgamated with or into, or transfers or conveys substantially all of its
assets to, or is liquidated into, the Company or a Restricted Subsidiary of the Company; 
 (4)    any Investment made
as a result of the receipt of non-cash consideration from an Asset Sale that was made pursuant to and in compliance with Section 4.10 hereof; 

(5)    any acquisition of assets or Capital Stock solely in exchange for, or from the net proceeds of, the issuance of
Equity Interests (other than Disqualified Stock) of the Company; 
 (6)    any Investments received in compromise or
resolution of (A) obligations of trade creditors or customers that were incurred in the ordinary course of business of the Company or any of its Restricted Subsidiaries, including pursuant to any plan of reorganization or similar arrangement
upon the bankruptcy or insolvency of any trade creditor or customer; or (B) litigation, arbitration or other disputes; 

(7)    Investments represented by Hedging Obligations; 

(8)    repurchases of the Notes; 

(9)    (i) any guarantee of Indebtedness permitted to be incurred by Section 4.09 hereof; provided that if
such Indebtedness can only be incurred by the Company or the Guarantors, then such guarantees are only permitted by this clause to the extent made by the Company or a Guarantor, and (ii) performance guarantees with respect to obligations
incurred by the Company or any of its Restricted Subsidiaries that are permitted by this Supplemental Indenture; 

(10)    any Investment existing on, or made pursuant to binding commitments existing on, the date of this Supplemental
Indenture and any Investment consisting of an extension, modification or renewal of any Investment existing on, or made pursuant to a binding commitment existing on, the date of this Supplemental Indenture; provided that the amount of any
such Investment may be increased (a) as required by the terms of such Investment as in existence on the date of this Supplemental Indenture or (b) as otherwise permitted under this Supplemental Indenture; 

  
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 (11)    Investments acquired after the date of this Supplemental
Indenture as a result of the acquisition by the Company or any Restricted Subsidiary of the Company of another Person, including by way of a merger, amalgamation or consolidation with or into the Company or any of its Restricted Subsidiaries in a
transaction that is not prohibited by Section 5.01 hereof after the date of this Supplemental Indenture to the extent that such Investments were not made in contemplation of such acquisition, merger, amalgamation or consolidation and were in
existence on the date of such acquisition, merger, amalgamation or consolidation; 
 (12)    Permitted Business
Investments having an aggregate Fair Market Value (measured on the date each such Investment was made and without giving effect to subsequent changes in value), when taken together with all other Investments made pursuant to this clause
(12) that are at the time outstanding not to exceed, as of the date any such Investment is made, the greater of (x) $325.0 million and (y) 16.25% of Consolidated Net Tangible Assets as of the date of such Investment; 

(13)    Guarantees by the Company or any Restricted Subsidiary of operating leases (other than Capitalized Lease
Obligations) or of other obligations that do not constitute Indebtedness, in each case entered into by any Restricted Subsidiary in the ordinary course of business; 

(14)    receivables owing to the Company or any Restricted Subsidiary and prepaid expenses created or acquired in the
ordinary course of business; 
 (15)    Investments in the nature of pledges or deposits with respect to leases or
utilities provided to third parties in the ordinary course of business; 
 (16)    Investments in escrow or trust funds
in the ordinary course of business; 
 (17)    Investments consisting of licensing or contribution of intellectual
property pursuant to joint marketing arrangements with other Persons; and 
 (18)    other Investments in any Person
having an aggregate Fair Market Value (measured on the date each such Investment was made and without giving effect to subsequent changes in value), when taken together with all other Investments made pursuant to this clause (18) that are at
the time outstanding not to exceed, as of the date of such Investment, the greater of (x) $110.0 million and (y) 5.5% of Consolidated Net Tangible Assets as of the date of such Investment. 

“Permitted Liens” means: 

(1)    Liens on assets of the Company or any of its Restricted Subsidiaries securing the Indebtedness permitted to be
incurred under Section 4.09(b)(1); 
 (2)    Liens on assets of the Company or any of its Restricted Subsidiaries
securing Indebtedness consisting of Hedging Obligations or Treasury Management Arrangements; 

  
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 (3)    Liens in favor of the Company or its Restricted Subsidiaries;

 (4)    Liens on property of a Person existing at the time such Person becomes a Restricted Subsidiary of the Company
or is merged with or into or consolidated with the Company or any Restricted Subsidiary of the Company; provided that such Liens were in existence prior to the contemplation of such Person becoming a Restricted Subsidiary of the Company or
such merger or consolidation and do not extend to any assets other than those of the Person that becomes a Restricted Subsidiary of the Company or is merged with or into or consolidated with the Company or any Restricted Subsidiary of the Company;

 (5)    Liens on property (including Capital Stock) existing at the time of acquisition of the property by the Company
or any Subsidiary of the Company; provided that such Liens were in existence prior to such acquisition and not incurred in contemplation of such acquisition; 

(6)    Liens to secure the performance of statutory obligations, insurance, surety or appeal bonds, performance bonds or
other obligations of a like nature incurred in the ordinary course of business (including Liens to secure letters of credit issued to assure payment of such obligations); 

(7)    Liens to secure Indebtedness represented by Capital Lease Obligations (other than Deemed Capitalized Leases),
mortgage financings or purchase money obligations, in each case, incurred for the purpose of financing all or any part of the purchase price or cost of design, construction, installation or improvement of property, plant or equipment used in the
business of the Company or any of its Restricted Subsidiaries, in an aggregate principal amount at any time outstanding, including all Permitted Refinancing Indebtedness incurred to renew, refund, refinance, replace, defease or discharge any
Indebtedness, when taken together with all other Indebtedness secured pursuant to this clause (7), not to exceed, as of any date of incurrence, the greater of (x) $85.0 million and (y) 4.25% of Consolidated Net Tangible Assets as of such date
of incurrence; provided that such Liens apply only to the assets acquired with or financed by such Indebtedness; 

(8)    Liens existing on the date of this Supplemental Indenture (other than Liens permitted under clause (1)); 

(9)    Liens for taxes, assessments or governmental charges or claims that are not yet delinquent or that are being
contested in good faith by appropriate proceedings promptly instituted and diligently conducted; provided that any reserve or other appropriate provision as is required in conformity with GAAP has been made therefor; 

(10)    Liens imposed by law, such as carriers’, warehousemen’s, landlord’s and mechanics’ Liens, in
each case, incurred in the ordinary course of business; 
 (11)    survey exceptions, easements or reservations of, or
rights of others for, licenses, rights-of-way, sewers, electric lines, telegraph and telephone lines and other similar purposes, or zoning or other restrictions as to
the use of real property that were not incurred in connection with Indebtedness and that do not in the aggregate materially impair the use of said properties in the operation of the business of such Person; 

  
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 (12)    Liens created for the benefit of (or to secure) the Notes (or
the related Note Guarantees); 
 (13)    Liens to secure any Permitted Refinancing Indebtedness permitted to be incurred
under this Supplemental Indenture; provided, however, that: 
 (a)    the new Lien is limited to all or
part of the same property and assets that secured or, under the written agreements pursuant to which the original Lien arose, could secure the original Lien (plus improvements and accessions to such property or proceeds or distributions thereof);
and 
 (b)    the Indebtedness secured by the new Lien is not increased to any amount greater than the sum of
(x) the outstanding principal amount, or, if greater, committed amount, of the Indebtedness renewed, refunded, refinanced, replaced, defeased or discharged with such Permitted Refinancing Indebtedness and (y) an amount necessary to pay any
fees and expenses, including premiums, related to such renewal, refunding, refinancing, replacement, defeasance or discharge; 

(14)    Liens on insurance policies and proceeds thereof, or other deposits, to secure insurance premium financings; 

(15)    filing of Uniform Commercial Code financing statements as a precautionary measure in connection with operating
leases; 
 (16)    bankers’ Liens, rights of setoff, Liens arising out of judgments or awards not constituting an
Event of Default and notices of lis pendens and associated rights related to litigation being contested in good faith by appropriate proceedings; 

(17)    Liens on cash, Cash Equivalents or other property arising in connection with the defeasance, discharge or
redemption of Indebtedness; 
 (18)    Liens on specific items of inventory or other goods (and the proceeds thereof) of
any Person securing such Person’s obligations in respect of bankers’ acceptances or trade-related letters of credit permitted under Section 4.09 hereof issued or created in the ordinary course of business for the account of such
Person to facilitate the purchase, shipment or storage of such inventory or other goods; 
 (19)    grants of
intellectual property licenses (including software and other technology licenses) in the ordinary course of business; 

(20)    Liens arising out of conditional sale, title retention, consignment or similar arrangements for the sale of goods
entered into in the ordinary course of business; 
 (21)    Liens incurred or pledges or deposits made in the ordinary
course of business in connection with workers’ compensation, unemployment insurance and other types of social security and employee health and disability benefits (including pledges or deposits securing liability to insurance carriers under
insurance or self-insurance arrangements); 

  
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 (22)    deposits made in the ordinary course of business to secure
liability to insurance carriers; 
 (23)    with respect to any lease or sublease entered into by the Company or any
Restricted Subsidiary in the ordinary course of business as a lessee, tenant, subtenant or other occupant, mortgages, obligations, liens and other encumbrances incurred, created or assumed or permitted to exist and arising by, through or under a
landlord or sublandlord of such leased real property encumbering such landlord’s or sublandlord’s interest in such leased real property; 

(24)    Liens incurred in connection with surety bonds or cash collateral posted by the Company or any of its Restricted
Subsidiaries from time to time in order to secure reclamation obligations; 
 (25)    all reservations in the original
grant of mineral rights in any lands and premises or any interests therein and all statutory exceptions, qualifications and reservations in respect of title; 

(26)    Liens on the assets of any Restricted Subsidiary of the Company that is not a Guarantor and which secure
Indebtedness or other obligations of such Restricted Subsidiary (or of another Restricted Subsidiary that is not a Guarantor) that are permitted to be incurred under Section 4.09 hereof; and 

(27)    other Liens with respect to obligations in an aggregate principal amount at any time outstanding, when taken
together with all other Indebtedness secured pursuant to this clause (27), not to exceed, as of any date of incurrence, the greater of (x) $110.0 million and (y) 5.5% of Consolidated Net Tangible Assets as of such date of incurrence. 

Liens to secure Credit Facilities will be deemed to have been incurred in reliance on clause (1) of this definition of “Permitted
Liens.” 
 “Permitted Refinancing Indebtedness” means any Indebtedness of the Company or any of its Restricted
Subsidiaries issued in exchange for, or the net proceeds of which are used to renew, refund, refinance, replace, defease or discharge other Indebtedness of the Company or any of its Restricted Subsidiaries (other than intercompany Indebtedness);
provided that: 
 (1)    the principal amount (or accreted value, if applicable) of such Permitted Refinancing
Indebtedness does not exceed the principal amount (or accreted value, if applicable) of the Indebtedness renewed, refunded, refinanced, replaced, defeased or discharged (plus all accrued interest on the Indebtedness and the amount of all fees and
expenses, including premiums, incurred in connection therewith); 
 (2)    such Permitted Refinancing Indebtedness has a
final maturity date later than the final maturity date of, and has a Weighted Average Life to Maturity that is (a) equal to or greater than the Weighted Average Life to Maturity of the Indebtedness being renewed, refunded, refinanced, replaced,
defeased or discharged or (b) more than 90 days after the final maturity date of the Notes; 

  
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 (3)    if the Indebtedness being renewed, refunded, refinanced,
replaced, defeased or discharged is subordinated in right of payment to the Notes, such Permitted Refinancing Indebtedness is subordinated in right of payment to the Notes on terms at least as favorable to the Holders of Notes as those contained in
the documentation governing the Indebtedness being renewed, refunded, refinanced, replaced, defeased or discharged; and 

(4)    such Indebtedness is incurred either by the Company or by the Restricted Subsidiary of the Company that was the
obligor on the Indebtedness being renewed, refunded, refinanced, replaced, defeased or discharged and is guaranteed only by Persons who were obligors or guarantors on the Indebtedness being renewed, refunded, refinanced, replaced, defeased or
discharged. 
 “Person” means any individual, corporation, partnership, joint venture, association, joint-stock company,
trust, unincorporated organization, limited liability company or government or other entity. 
 “Principal Mine Assets”
means the Lucky Friday mine located in Mullan, Idaho, the Greens Creek mine located in Admiralty Island, Alaska and the Casa Berardi mine located in Quebec, Canada, in each case, as described in the Prospectus. 

“Pro Forma Cost Savings” means, with respect to any four-quarter period, the reduction in net costs and expenses that: 

(1)    the Company determines in good faith were directly attributable to an acquisition, Investment, disposition, merger,
consolidation or discontinued operation or other specified action that occurred during the four-quarter period or after the end of the four-quarter period and on or prior to the Calculation Date; 

(2)    were actually implemented prior to the Calculation Date in connection with or as a result of an acquisition,
Investment, disposition, merger, consolidation or discontinued operation or other specified action and that are supportable and quantifiable by the underlying accounting records; or 

(3)    relate to an acquisition, Investment, disposition, merger, consolidation or discontinued operation or other
specified action and that the Company reasonably determines are probable based upon specifically identifiable actions to be taken within six months of the date of the closing of the acquisition, Investment, disposition, merger, consolidation or
discontinued operation or specified action. 
 “Prospectus” means the prospectus supplement, dated February 13, 2020,
relating to the sale of the Initial Notes, together with the base prospectus, dated February 22, 2019 referenced therein. 

“Qualifying Equity Interests” means Equity Interests of the Company other than (1) Disqualified Stock and
(2) Equity Interests sold in an Equity Offering prior to the third anniversary of the date of this Supplemental Indenture that are eligible to be used to support an optional redemption of Notes pursuant to Section 3.07(a) hereof. 

  
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 “Responsible Officer,” when used with respect to the Trustee, means any
officer within the Corporate Trust Administration of the Trustee (or any successor group of the Trustee) or any other officer of the Trustee customarily performing functions similar to those performed by any of the above designated officers and also
means, with respect to a particular corporate trust matter, any other officer to whom such matter is referred because of his knowledge of and familiarity with the particular subject and who shall have direct responsibility for the administration of
this Supplemental Indenture. 
 “Restricted Investment” means an Investment other than a Permitted Investment. 

“Restricted Subsidiary” of a Person means any Subsidiary of such Person that is not an Unrestricted Subsidiary. 

“SEC” means the U.S. Securities and Exchange Commission. 

“Securities Act” means the Securities Act of 1933, as amended, and the rules and regulations of the SEC promulgated
thereunder. 
 “Senior Credit Facility” means that certain Fifth Amended and Restated Credit Agreement, dated as of
July 16, 2018 (as amended, supplemented, amended and restated or otherwise modified from time to time) by and among the Company, as parent and as a guarantor, The Bank of Nova Scotia, as Administrative Agent, Hecla Limited, Hecla Alaska LLC,
Hecla Greens Creek Mining Company and Hecla Juneau Mining Company, as borrowers, and the other parties thereto. 

“S&P” means S&P Global Ratings, a division of S&P Global Inc. 

“Significant Subsidiary” means any Restricted Subsidiary that would be a “significant subsidiary” as defined in
Article 1, Rule 1-02 of Regulation S-X, promulgated pursuant to the Securities Act, as such Regulation is in effect on the date of this Supplemental Indenture. 

“Stated Maturity” means, with respect to any installment of interest or principal on any series of Indebtedness, the date on
which the payment of interest or principal was scheduled to be paid in the documentation governing such Indebtedness as of the date of this Supplemental Indenture, and will not include any contingent obligations to repay, redeem or repurchase any
such interest or principal prior to the date originally scheduled for the payment thereof. 
 “Subsidiary” means, with
respect to any specified Person: 
 (1)    any corporation, association or other business entity of which more than 50%
of the total voting power of shares of Capital Stock entitled (without regard to the occurrence of any contingency and after giving effect to any voting agreement or stockholders’ agreement that effectively transfers voting power) to vote in
the election of directors, managers or trustees of the corporation, association or other business entity is at the time owned or controlled, directly or indirectly, by that Person or one or more of the other Subsidiaries of that Person (or a
combination thereof); and 

  
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 (2)    any partnership or limited liability company of which
(a) more than 50% of the capital accounts, distribution rights, total equity and voting interests or general and limited partnership interests, as applicable, are owned or controlled, directly or indirectly, by such Person or one or more of the
other Subsidiaries of that Person or a combination thereof, whether in the form of membership, general, special or limited partnership interests or otherwise, and (b) such Person or any Subsidiary of such Person is a controlling general partner
or otherwise controls such entity. 
 “TIA” means the Trust Indenture Act of 1939, as amended (15 U.S. C. §§
77aaa-77bbbb). 
 “Treasury Management Arrangement” means any agreement or other arrangement governing the provision of
treasury or cash management services, including deposit accounts, overdraft, credit or debit card, funds transfer, automated clearinghouse, zero balance accounts, returned check concentration, controlled disbursement, lockbox, account reconciliation
and reporting and trade finance services and other cash management services. 
 “Treasury Rate” means, as of any redemption
date, the yield to maturity as of the earlier of (a) such redemption date or (b) the date on which such Notes are defeased or satisfied and discharged, of United States Treasury securities with a constant maturity (as compiled and
published in the most recent Federal Reserve Statistical Release H. 15 (519) that has become publicly available at least two Business Days prior to such date (or, if such Statistical Release is no longer published, any publicly available source of
similar market data)) most nearly equal to the period from the redemption date to February 15, 2023; provided, however, that if the period from the redemption date to February 15, 2023, is less than one year, the weekly
average yield on actually traded United States Treasury securities adjusted to a constant maturity of one year will be used. Any such Treasury Rate shall be obtained by the Company. 

“Trustee” means The Bank of New York Mellon Trust Company, N.A., until a successor replaces it in accordance with the
applicable provisions of this Supplemental Indenture and thereafter means the successor serving hereunder. 
 “Unrestricted
Subsidiary” means any Subsidiary of the Company that is designated by the Board of Directors of the Company as an Unrestricted Subsidiary pursuant to a resolution of the Board of Directors of the Company, but only to the extent that such
Subsidiary: 
 (1)    has no Indebtedness other than Non-Recourse Debt; 

(2)    except as permitted by Section 4.11 hereof, is not party to any agreement, contract, arrangement or
understanding with the Company or any Restricted Subsidiary of the Company unless the terms of any such agreement, contract, arrangement or understanding are not materially less favorable, taken as a whole, to the Company or such Restricted
Subsidiary than those that might be obtained at the time from Persons who are not Affiliates of the Company; and 

(3)    is a Person with respect to which neither the Company nor any of its Restricted Subsidiaries has any direct or
indirect obligation (a) to subscribe for additional Equity Interests or (b) to maintain or preserve such Person’s financial condition or to cause such Person to achieve any specified levels of operating results. 

  
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 “Voting Stock” of any specified Person as of any date means the Capital
Stock of such Person that is at the time entitled to vote in the election of the Board of Directors of such Person. 
 “Weighted
Average Life to Maturity” means, when applied to any Indebtedness at any date, the number of years obtained by dividing: 

(1)    the sum of the products obtained by multiplying (a) the amount of each then remaining installment, sinking
fund, serial maturity or other required payments of principal, including payment at final maturity, in respect of the Indebtedness, by (b) the number of years (calculated to the nearest one-twelfth) that
will elapse between such date and the making of such payment; by 
 (2)    the then outstanding principal amount
of such Indebtedness. 
 Section 1.02.    Other Definitions. 

 

			
	 Term
	  	Defined in
Section
	 “Affiliate Transaction”
	  	4.11
	 “Asset Sale Offer”
	  	3.09
	 “Authentication Order”
	  	2.02
	 “Change of Control Offer”
	  	4.15
	 “Change of Control Payment”
	  	4.15
	 “Change of Control Payment Date”
	  	4.15
	 “Covenant Defeasance”
	  	8.03
	 “DTC”
	  	2.03
	 “Event of Default”
	  	6.01
	 “Excess Proceeds”
	  	4.10
	 “incur”
	  	4.09
	 “Legal Defeasance”
	  	8.02
	 “Offer Amount”
	  	3.09
	 “Offer Period”
	  	3.09
	 “Paying Agent”
	  	2.03
	 “Permitted Debt”
	  	4.09
	 “Payment Default”
	  	6.01
	 “Purchase Date”
	  	3.09
	 “Registrar”
	  	2.03
	 “Restricted Payments”
	  	4.07

 Section 1.03.    Incorporation by Reference of Trust Indenture Act. 

Whenever this Supplemental Indenture refers to a provision of the TIA, the provision is incorporated by reference in and made a part of this
Supplemental Indenture. 
 The following TIA terms used in this Supplemental Indenture have the following meanings: 

“indenture securities” means the Notes; 

  
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 “indenture security Holder” means a Holder of a Note; 

“indenture to be qualified” means this Supplemental Indenture; 

“indenture trustee” or “institutional trustee” means the Trustee; and 

“obligor” on the Notes and the Note Guarantees means the Company and the Guarantors, respectively, and any successor obligor upon
the Notes and the Note Guarantees, respectively. 
 All other terms used in this Supplemental Indenture that are defined by the TIA, defined
by TIA reference to another statute or defined by SEC rule under the TIA have the meanings so assigned to them. 

Section 1.04.    Rules of Construction. 

Unless the context otherwise requires: 

(1)    a term has the meaning assigned to it; 

(2)    an accounting term not otherwise defined has the meaning assigned to it in accordance with GAAP;

 (3)    “or” is not exclusive; 

(4)    “including” is not limiting; 

(5)    words in the singular include the plural, and in the plural include the singular; 

(6)    “will” shall be interpreted to express a command; 

(7)    provisions apply to successive events and transactions; and 

(8)    references to sections of or rules under the Exchange Act, the Securities Act or the TIA will be
deemed to include substitute, replacement or successor sections or rules adopted by the SEC from time to time. 

Section 1.05.    Scope of Supplemental Indenture. Unless otherwise stated, the terms and provisions contained
in the Base Indenture shall constitute, and are hereby expressly made, a part of this Supplemental Indenture and the Company, the Guarantors and the Trustee, by their execution and delivery of this Supplemental Indenture, expressly agree to such
terms and provisions and to be bound thereby. Notwithstanding any of the foregoing to the contrary, the provisions of this Supplemental Indenture shall supersede any corresponding provisions in the Base Indenture, and to the extent any provision of
the Base Indenture conflicts with the express provisions of this Supplemental Indenture, the provisions of this Supplemental Indenture shall govern and be controlling. The changes, modifications and supplements to the Base Indenture effected by this
Supplemental Indenture shall be applicable only with respect to, and shall only govern the terms of, the Notes, which may be issued from time to time, and shall not apply to 

  
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any other Securities that may be issued under the Base Indenture unless a supplemental indenture with respect to such other Securities specifically incorporates such changes, modifications and
supplements. 
 ARTICLE 2 

THE NOTES 

Section 2.01.    Form and Dating. 

(a)    General. The Notes and the Trustee’s certificate of authentication will be substantially in the form of
Exhibit A hereto. The Notes may have notations, legends or endorsements required by law, stock exchange rule or usage. Each Note will be dated the date of its authentication. The Notes shall be in denominations of $2,000 and integral multiples of
$1,000 in excess thereof. 
 The terms and provisions contained in the Notes will constitute, and are hereby expressly made, a part of this
Supplemental Indenture and the Company, the Guarantors and the Trustee, by their execution and delivery of this Supplemental Indenture, expressly agree to such terms and provisions and to be bound thereby. However, to the extent any provision of any
Note conflicts with the express provisions of this Supplemental Indenture, the provisions of this Supplemental Indenture shall govern and be controlling. 

(b)    Global Notes. Notes issued in global form will be substantially in the form of Exhibit A hereto (including
the Global Note Legend thereon and the “Schedule of Exchanges of Interests in the Global Note” attached thereto). Notes issued in definitive form will be substantially in the form of Exhibit A hereto (but without the Global Note Legend
thereon and without the “Schedule of Exchanges of Interests in the Global Note” attached thereto). Each Global Note will represent such of the outstanding Notes as will be specified therein and each shall provide that it represents the
aggregate principal amount of outstanding Notes from time to time endorsed thereon and that the aggregate principal amount of outstanding Notes represented thereby may from time to time be reduced or increased, as appropriate, to reflect exchanges
and redemptions. Any endorsement of a Global Note to reflect the amount of any increase or decrease in the aggregate principal amount of outstanding Notes represented thereby will be made by the Trustee or the Custodian, at the direction of the
Trustee, in accordance with instructions given by the Holder thereof as required by Section 2.06 hereof. 

Section 2.02.    Execution and Authentication. At least one Officer must sign the Notes for the Company by
manual or facsimile signature. 
 If an Officer whose signature is on a Note no longer holds that office at the time a Note is
authenticated, the Note will nevertheless be valid. 
 A Note will not be valid until authenticated by the manual signature of the Trustee.
The signature will be conclusive evidence that the Note has been authenticated under this Supplemental Indenture. 
 The Trustee will, upon
receipt of a written order of the Company signed by an Officer (an “Authentication Order”), authenticate Notes for original issue that may be validly issued under 

  
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this Supplemental Indenture, including any Additional Notes. The aggregate principal amount of Notes outstanding at any time may not exceed the aggregate principal amount of Notes authorized for
issuance by the Company pursuant to one or more Authentication Orders, except as provided in Section 2.07 hereof. 
 The Trustee may
appoint an authenticating agent acceptable to the Company to authenticate Notes. An authenticating agent may authenticate Notes whenever the Trustee may do so. Each reference in this Supplemental Indenture to authentication by the Trustee includes
authentication by such agent. An authenticating agent has the same rights as an Agent to deal with Holders or an Affiliate of the Company. 

Section 2.03.    Registrar and Paying Agent. The Company will maintain an office or agency where Notes may be
presented for registration of transfer or for exchange (“Registrar”) and an office or agency where Notes may be presented for payment (“Paying Agent”). The Registrar will keep a register of the Notes and of their
transfer and exchange. The Company may appoint one or more co-registrars and one or more additional paying agents. The term “Registrar” includes any
co-registrar and the term “Paying Agent” includes any additional paying agent. The Company may change any Paying Agent or Registrar without notice to any Holder. The Company will notify the Trustee
in writing of the name and address of any Agent not a party to this Supplemental Indenture. If the Company fails to appoint or maintain another entity as Registrar or Paying Agent, the Trustee shall act as such. The Company or any of its
Subsidiaries may act as Paying Agent or Registrar. 
 The Company initially appoints The Depository Trust Company (“DTC”)
to act as Depositary with respect to the Global Notes. The Company may change the Depositary at any time without notice to any Holder, but the Company will notify the Trustee of the name and address of any new Depositary. 

The Company initially appoints the Trustee to act as the Registrar and Paying Agent and to act as Custodian with respect to the Global Notes.

 Section 2.04.    Paying Agent to Hold Money in Trust. The Company will require each Paying Agent other
than the Trustee to agree in writing that the Paying Agent will hold in trust for the benefit of Holders or the Trustee all money held by the Paying Agent for the payment of principal of, premium on, if any, or interest on, the Notes, and will
notify the Trustee of any default by the Company in making any such payment. While any such default continues, the Trustee may require a Paying Agent to pay all money held by it to the Trustee. The Company at any time may require a Paying Agent to
pay all money held by it to the Trustee. Upon payment over to the Trustee, the Paying Agent (if other than the Company or a Subsidiary) will have no further liability for the money. If the Company or a Subsidiary is acting as Paying Agent for the
Notes, it will segregate and hold in a separate trust fund for the benefit of the Holders all money held by it as Paying Agent. If the Company or a Subsidiary is acting as Paying Agent for the Notes, upon any bankruptcy or reorganization proceedings
relating to the Company, the Trustee will serve as Paying Agent for the Notes. 
 Section 2.05.    Holder
Lists. The Trustee will preserve in as current a form as is reasonably practicable the most recent list available to it of the names and addresses of all 

  
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Holders and shall otherwise comply with TIA §312(a). If the Trustee is not the Registrar, the Company will furnish to the Trustee (a) semi-annually at least seven Business Days before
each interest payment date a list, in such form and as of such date as the Trustee may reasonably require of the names and addresses of the Holders of Notes, provided that the Company shall not be obligated to furnish or cause to be furnished such
list at any time that the list shall not differ in any respect from the most recent list furnished to the Trustee by the Company and (b) at such other times as the Trustee may request in writing within 30 days after the receipt by the Company
of any such request, a list of similar form and content as of a date not more than 15 days prior to the time such list is furnished and the Company shall otherwise comply with TIA §312(a). 

Section 2.06.    Transfer and Exchange. 

(a)    Transfer and Exchange of Global Notes. A Global Note may not be transferred except as a whole by the
Depositary to a nominee of the Depositary, by a nominee of the Depositary to the Depositary or to another nominee of the Depositary, or by the Depositary or any such nominee to a successor Depositary or a nominee of such successor Depositary. Global
Notes will be exchanged by the Company for Definitive Notes if: 
 (1)    the Company delivers to the
Trustee notice from the Depositary that it is unwilling or unable to continue to act as Depositary or that it is no longer a clearing agency registered under the Exchange Act and, in either case, a successor Depositary is not appointed by the
Company within 120 days after the date of such notice from the Depositary; 
 (2)    the Company in its
sole discretion determines that the Global Notes (in whole but not in part) should be exchanged for Definitive Notes and delivers a written notice to such effect to the Trustee; or 

(3)    there has occurred and is continuing a Default or an Event of Default and the owner of a beneficial
interest in a Global Note requests such exchange in writing through the Depositary. 
 Upon the occurrence of either of the preceding events
in (1) or (2) above, Definitive Notes shall be issued in such names as the Depositary shall instruct the Trustee. Global Notes also may be exchanged or replaced, in whole or in part, as provided in Sections 2.07 and 2.10 hereof. Every Note
authenticated and delivered in exchange for, or in lieu of, a Global Note or any portion thereof, pursuant to this Section 2.06 or Section 2.07 or 2.10 hereof, shall be authenticated and delivered in the form of, and shall be, a Global
Note. A Global Note may not be exchanged for another Note other than as provided in this Section 2.06(a), however, beneficial interests in a Global Note may be transferred and exchanged as provided in Section 2.06(b), (c) or
(f) hereof. 
 (b)    Transfer and Exchange of Beneficial Interests in the Global Notes. The transfer and
exchange of beneficial interests in the Global Notes will be effected through the Depositary, in accordance with the provisions of this Supplemental Indenture and the Applicable Procedures. Beneficial interests in any Global Note may be transferred
to Persons who take delivery thereof 

  
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in the form of a beneficial interest in a Global Note. No written orders or instructions shall be required to be delivered to the Registrar to effect the transfers described in this
Section 2.06(b) and 2.06(d) hereof. 
 (c)    Transfer or Exchange of Beneficial Interests for Definitive
Notes. If any holder of a beneficial interest in a Global Note proposes to exchange such beneficial interest for a Definitive Note or to transfer such beneficial interest to a Person who takes delivery thereof in the form of a Definitive Note,
then, the Trustee shall cause the aggregate principal amount of the applicable Global Note to be reduced accordingly pursuant to Section 2.06(g) hereof, and the Company shall execute and the Trustee shall authenticate and deliver to the Person
designated in the instructions a Definitive Note in the appropriate principal amount. Any Definitive Note issued in exchange for a beneficial interest in a Global Note pursuant to this Section 2.06(c) shall be registered in such name or names
and in such authorized denomination or denominations as the holder of such beneficial interest shall instruct the Registrar through instructions from the Depositary and the Participant or Indirect Participant. The Trustee shall deliver such
Definitive Notes to the Persons in whose names such Notes are so registered. 
 (d)    Transfer and Exchange of
Definitive Notes for Beneficial Interests. If any Holder of a Definitive Note proposes to exchange such Note for a beneficial interest in a Global Note or to transfer such Definitive Notes to a Person who takes delivery thereof in the form of a
beneficial interest in a Global Note, then, the Trustee will cancel the Definitive Notes and increase or cause to be increased the aggregate principal amount of the Global Note. 

(e)    Transfer and Exchange of Definitive Notes for Definitive Notes. Upon request by a Holder of Definitive Notes
and such Holder’s compliance with the provisions of this Section 2.06(e), the Registrar will register the transfer or exchange of Definitive Notes. Prior to such registration of transfer or exchange, the requesting Holder must present or
surrender to the Registrar the Definitive Notes duly endorsed or accompanied by a written instruction of transfer in form satisfactory to the Registrar duly executed by such Holder or by its attorney, duly authorized in writing. In addition, the
requesting Holder must provide any additional certifications, documents and information, as applicable, required pursuant to the following provisions of this Section 2.06(e). 

Any Definitive Note may be transferred to and registered in the name of Persons who take delivery thereof in the form of a Definitive Note.

 (f)    Global Note Legend. Each Global Note will bear a legend in substantially the following form: 

“THIS GLOBAL NOTE IS HELD BY THE DEPOSITARY (AS DEFINED IN THE FIRST SUPPLEMENTAL INDENTURE GOVERNING THIS NOTE) OR ITS NOMINEE IN CUSTODY FOR THE
BENEFIT OF THE BENEFICIAL OWNERS HEREOF, AND IS NOT TRANSFERABLE TO ANY PERSON UNDER ANY CIRCUMSTANCES EXCEPT THAT (1) THE TRUSTEE MAY MAKE SUCH NOTATIONS HEREON AS MAY BE REQUIRED PURSUANT TO SECTION 2.06 OF THE FIRST SUPPLEMENTAL INDENTURE,
(2) THIS GLOBAL NOTE MAY BE EXCHANGED IN WHOLE BUT NOT IN PART PURSUANT TO SECTION 2.06(a) OF THE FIRST SUPPLEMENTAL INDENTURE, (3) THIS GLOBAL 

  
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NOTE MAY BE DELIVERED TO THE TRUSTEE FOR CANCELLATION PURSUANT TO SECTIONS 2.06(g) AND 2.11 OF THE FIRST SUPPLEMENTAL INDENTURE AND (4) THIS GLOBAL NOTE MAY BE TRANSFERRED TO A SUCCESSOR
DEPOSITARY WITH THE PRIOR WRITTEN CONSENT OF THE COMPANY. 
 UNLESS AND UNTIL IT IS EXCHANGED IN WHOLE OR IN PART FOR NOTES IN DEFINITIVE FORM, THIS NOTE
MAY NOT BE TRANSFERRED EXCEPT AS A WHOLE BY THE DEPOSITARY TO A NOMINEE OF THE DEPOSITARY OR BY A NOMINEE OF THE DEPOSITARY TO THE DEPOSITARY OR ANOTHER NOMINEE OF THE DEPOSITARY OR BY THE DEPOSITARY OR ANY SUCH NOMINEE TO A SUCCESSOR DEPOSITARY OR
A NOMINEE OF SUCH SUCCESSOR DEPOSITARY. UNLESS THIS CERTIFICATE IS PRESENTED BY AN AUTHORIZED REPRESENTATIVE OF THE DEPOSITORY TRUST COMPANY (55 WATER STREET, NEW YORK, NEW YORK) (“DTC”), TO THE COMPANY OR ITS AGENT FOR REGISTRATION OF
TRANSFER, EXCHANGE OR PAYMENT, AND ANY CERTIFICATE ISSUED IS REGISTERED IN THE NAME OF CEDE & CO. OR SUCH OTHER NAME AS MAY BE REQUESTED BY AN AUTHORIZED REPRESENTATIVE OF DTC (AND ANY PAYMENT IS MADE TO CEDE & CO. OR SUCH OTHER
ENTITY AS MAY BE REQUESTED BY AN AUTHORIZED REPRESENTATIVE OF DTC), ANY TRANSFER, PLEDGE OR OTHER USE HEREOF FOR VALUE OR OTHERWISE BY OR TO ANY PERSON IS WRONGFUL INASMUCH AS THE REGISTERED OWNER HEREOF, CEDE & CO., HAS AN INTEREST
HEREIN.” 
 (g)    Cancellation and/or Adjustment of Global Notes. At such time as all beneficial interests
in a particular Global Note have been exchanged for Definitive Notes or a particular Global Note has been redeemed, repurchased or canceled in whole and not in part, each such Global Note will be returned to or retained and canceled by the Trustee
in accordance with Section 2.11 hereof. At any time prior to such cancellation, if any beneficial interest in a Global Note is exchanged for or transferred to a Person who will take delivery thereof in the form of a beneficial interest in
another Global Note or for Definitive Notes, the principal amount of Notes represented by such Global Note will be reduced accordingly and an endorsement will be made on such Global Note by the Trustee or by the Depositary at the direction of the
Trustee to reflect such reduction; and if the beneficial interest is being exchanged for or transferred to a Person who will take delivery thereof in the form of a beneficial interest in another Global Note, such other Global Note will be increased
accordingly and an endorsement will be made on such Global Note by the Trustee or by the Depositary at the direction of the Trustee to reflect such increase. 

(h)    General Provisions Relating to Transfers and Exchanges. 

(1)    To permit registrations of transfers and exchanges, the Company will execute and the Trustee will
authenticate Global Notes and Definitive Notes upon receipt of an Authentication Order in accordance with Section 2.02 hereof or at the Registrar’s request. 

(2)    No service charge will be made to a holder of a beneficial interest in a Global Note or to a Holder
of a Definitive Note for any registration of transfer or exchange, but the Company may require payment of a sum sufficient to cover any 

  
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transfer tax or similar governmental charge payable in connection therewith (other than any such transfer taxes or similar governmental charge payable upon exchange or transfer pursuant to
Sections 2.10, 3.06, 3.09, 4.10, 4.15 and 9.05 hereof). 
 (3)    Neither the Registrar nor the Company
will be required to register the transfer of or exchange of any Note selected for redemption in whole or in part, except the unredeemed portion of any Note being redeemed in part. 

(4)    All Global Notes and Definitive Notes issued upon any registration of transfer or exchange of Global
Notes or Definitive Notes will be the valid obligations of the Company, evidencing the same debt, and entitled to the same benefits under this Supplemental Indenture, as the Global Notes or Definitive Notes surrendered upon such registration of
transfer or exchange. 
 (5)    Neither the Registrar nor the Company will be required: 

(A)    to issue, to register the transfer of or to exchange any Notes during a period beginning at the
opening of business 15 days before the day of any selection of Notes for redemption under Section 3.02 hereof and ending at the close of business on the day of selection; 

(B)    to register the transfer of or to exchange any Note selected for redemption in whole or in part,
except the unredeemed portion of any Note being redeemed in part; or 
 (C)    to register the transfer
of or to exchange a Note between a record date and the next succeeding interest payment date. 

(6)    Prior to due presentment for the registration of a transfer of any Note, the Trustee, any Agent and
the Company may deem and treat the Person in whose name any Note is registered as the absolute owner of such Note for the purpose of receiving payment of principal of and interest on such Notes and for all other purposes, and none of the Trustee,
any Agent or the Company shall be affected by notice to the contrary. 
 (7)    The Trustee will
authenticate Global Notes and Definitive Notes in accordance with the provisions of Section 2.02 hereof. 

(8)    All certifications, certificates and Opinions of Counsel required to be submitted to the Registrar
pursuant to this Section 2.06 to effect a registration of transfer or exchange may be submitted by facsimile. 

(9)    The Trustee shall have no obligation or duty to monitor, determine or inquire as to compliance with
any restrictions on transfer imposed under this Supplemental Indenture or under applicable law with respect to any transfer of any interest in any Notes (including any transfers between or among Depositary Participants or beneficial owners of
interests in any Global Note) other than to require delivery of such certificates and other documentation or evidence as are expressly required by, and to do so if and when expressly required by the terms of, this Supplemental Indenture, and to


  
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examine the same to determine substantial compliance as to form with the express requirements hereof. Neither the Trustee nor any Agent shall have any responsibility for any actions taken or not
taken by the Depositary. 
 Section 2.07.    Replacement Notes. If any mutilated Note is surrendered to the
Trustee or the Company and the Trustee receives evidence to its satisfaction of the destruction, loss or theft of any Note, the Company will issue and the Trustee, upon receipt of an Authentication Order, will authenticate a replacement Note. If
required by the Trustee or the Company, an indemnity bond must be supplied by the Holder that is sufficient in the judgment of the Trustee and the Company to protect the Company, the Trustee, any Agent and any authenticating agent from any loss that
any of them may suffer if a Note is replaced. The Company may charge for its expenses in replacing a Note. 
 Every replacement Note is an
obligation of the Company and will be entitled to all of the benefits of this Supplemental Indenture equally and proportionately with all other Notes duly issued hereunder that are then outstanding as provided in Section 2.08. 

Section 2.08.    Outstanding Notes. The Notes outstanding at any time are all the Notes authenticated by the
Trustee except for those canceled by it, those delivered to it for cancellation, those reductions in the interest in a Global Note effected by the Trustee in accordance with the provisions hereof, and those described in this Section 2.08 as not
outstanding. Except as set forth in Section 2.09 hereof, a Note does not cease to be outstanding because the Company or an Affiliate of the Company holds the Note; however, Notes held by the Company or a Subsidiary of the Company shall not be
deemed to be outstanding for purposes of Section 3.07(a) hereof. 
 If a Note is replaced pursuant to Section 2.07 hereof, it will
no longer be considered to be outstanding unless the Trustee receives proof satisfactory to it that the replaced Note is held by a “protected purchaser” (as defined in the Uniform Commercial Code), and shall be deemed cancelled for all
purposes. 
 If the principal amount of any Note is considered paid under Section 4.01 hereof, it ceases to be outstanding, shall be
deemed cancelled and interest on it ceases to accrue. 
 If the Paying Agent (other than the Company, a Subsidiary of the Company or an
Affiliate of any thereof) holds, on a redemption date or maturity date, money sufficient to pay Notes payable on that date, then on and after that date such Notes will be deemed to be no longer outstanding, shall be deemed cancelled, and will cease
to accrue interest. 
 Section 2.09.    Treasury Notes. In determining whether the Holders of the required
principal amount of Notes have concurred in any direction, waiver or consent, Notes owned by the Company or any Guarantor, or by any Person directly or indirectly controlling or controlled by or under direct or indirect common control with the
Company or any Guarantor, will be considered as though not outstanding, except that for the purposes of determining whether the Trustee will be protected in relying on any such direction, waiver or consent, only Notes that a Responsible Officer of
the Trustee actually knows are so owned will be so disregarded. 
 Section 2.10.    Temporary Notes. Until
certificates representing Notes are ready for delivery, the Company may prepare and the Trustee, upon receipt of an Authentication Order, 

  
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will authenticate temporary Notes. Temporary Notes will be substantially in the form of certificated Notes but may have variations that the Company considers appropriate for temporary Notes and
as may be reasonably acceptable to the Trustee. Without unreasonable delay, the Company will prepare and the Trustee will authenticate definitive Notes in exchange for temporary Notes. 

Holders of temporary Notes will be entitled to all of the benefits of this Supplemental Indenture. 

Section 2.11.    Cancellation. The Company at any time may deliver Notes to the Trustee for cancellation. The
Registrar and Paying Agent will forward to the Trustee any Notes surrendered to them for registration of transfer, exchange or payment. The Trustee and no one else will cancel all Notes surrendered for registration of transfer, exchange, payment,
replacement or cancellation and will dispose of canceled Notes (subject to the record retention requirements of the Exchange Act) in accordance with its procedures for the disposition of canceled securities. Certification of the disposition of all
canceled Notes will be delivered to the Company upon written request therefor. The Company may not issue new Notes to replace Notes that it has paid or that have been delivered to the Trustee for cancellation. 

Section 2.12.    Defaulted Interest. If the Company defaults in a payment of interest on the Notes, it will
pay the defaulted interest in any lawful manner plus, to the extent lawful, interest payable on the defaulted interest, to the Persons who are Holders on a subsequent special record date, in each case at the rate provided in the Notes and in
Section 4.01 hereof. The Company will notify the Trustee in writing of the amount of defaulted interest proposed to be paid on each Note and the date of the proposed payment. The Company will fix or cause to be fixed each such special record
date and payment date; provided that no such special record date may be less than 10 days prior to the related payment date for such defaulted interest. At least 15 days before the special record date, the Company (or, upon the written
request of the Company, the Trustee in the name and at the expense of the Company) will mail or cause to be mailed to Holders a notice that states the special record date, the related payment date and the amount of such interest to be paid. 

Section 2.13.    CUSIP Numbers. The Company in issuing the Notes may use “CUSIP” numbers (if then
generally in use), and, if so, the Trustee shall use “CUSIP” numbers in notices of redemption as a convenience to Holders; provided that any such notice may state that no representation is made as to the correctness of such numbers either
as printed on the Notes or as contained in any notice of a redemption and that reliance may be placed only on the other identification numbers printed on the Notes, and any such redemption shall not be affected by any defect in or omission of such
numbers. The Company will promptly notify the Trustee in writing of any change in the “CUSIP” numbers. 
 ARTICLE 3 

REDEMPTION AND PREPAYMENT 

Section 3.01.    Notices to Trustee. If the Company elects to redeem Notes pursuant to the optional redemption
provisions of Section 3.07 hereof, it must furnish to the Trustee, at least 15 days but not more than 60 days before a redemption date, an Officer’s Certificate setting forth: 

(1)    the clause of this Supplemental Indenture pursuant to which the redemption shall occur; 

  
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 (2)    the redemption date; 

(3)    the principal amount of Notes to be redeemed; and 

(4)    the redemption price. 

Section 3.02.    Selection of Notes to Be Redeemed or Purchased. If less than all of the Notes are to be
redeemed or purchased in an offer to purchase at any time, the Trustee will select Notes for redemption or purchase on a pro rata basis (or, in the case of Notes issued in global form pursuant to Article 2 hereof, by lot or otherwise in
accordance with applicable procedures of DTC) unless otherwise required by law or applicable stock exchange or depositary requirements. 

In the event of partial redemption or purchase by lot, the particular Notes to be redeemed or purchased will be selected, unless otherwise
provided herein, not less than 15 nor more than 60 days prior to the redemption or purchase date from the outstanding Notes not previously called for redemption or purchase. 

The Trustee will promptly notify the Company in writing of the Notes selected for redemption or purchase and, in the case of any Note selected
for partial redemption or purchase, the principal amount thereof to be redeemed or purchased. Notes and portions of Notes selected will be in amounts of $2,000 or whole multiples of $1,000 in excess thereof; provided that no Notes of $2,000
or less shall be redeemed in part. Except as provided in the preceding sentence, provisions of this Supplemental Indenture that apply to Notes called for redemption or purchase also apply to portions of Notes called for redemption or purchase. 

Section 3.03.    Notice of Redemption. Subject to the provisions of Section 3.09 hereof, at least 15 days
but not more than 60 days before a redemption date, the Company will mail or cause to be mailed, by first class mail (or, in the case of Notes issued in global form, electronic transmission), a notice of redemption to each Holder whose Notes are to
be redeemed at its registered address, except that redemption notices may be mailed (or electronically transmitted to DTC) more than 60 days prior to a redemption date if the notice is issued in connection with a defeasance of the Notes or a
satisfaction and discharge of this Supplemental Indenture pursuant to Articles 8 or 11 hereof. 
 The notice will identify the Notes to be
redeemed (including the CUSIP number, if any) and will state: 
 (1)    the redemption date; 

(2)    the redemption price; 

  
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 (3)    if any Note is being redeemed in part, the
portion of the principal amount of such Note to be redeemed and that, after the redemption date upon surrender of such Note, a new Note or Notes in principal amount equal to the unredeemed portion will be issued upon cancellation of the original
Note; 
 (4)    the name and address of the Paying Agent; 

(5)    that Notes called for redemption must be surrendered to the Paying Agent to collect the redemption
price; 
 (6)    that, unless the Company defaults in making such redemption payment, interest on Notes
called for redemption ceases to accrue on and after the redemption date; 
 (7)    the paragraph of the
Notes and/or Section of this Supplemental Indenture pursuant to which the Notes called for redemption are being redeemed; and 

(8)    that no representation is made as to the correctness or accuracy of the CUSIP number, if any, listed
in such notice or printed on the Notes; and 
 (9)    a description of the conditions precedent (if any)
applicable to such redemption and, if applicable, the additional information described in the last paragraph of Section 3.09. 
 At the
Company’s request, the Trustee will give the notice of redemption in the Company’s name and at its expense; provided, however, that the Company has delivered to the Trustee, at least 20 days prior to the redemption date, an
Officer’s Certificate requesting that the Trustee give such notice and setting forth the information to be stated in such notice as provided in the preceding paragraph. 

Section 3.04.    Effect of Redemption. Once notice of redemption is mailed in accordance with
Section 3.03 hereof, Notes called for redemption become irrevocably due and payable on the redemption date at the redemption price, unless such redemption is conditioned on the happening of a future event 

Section 3.05.     Deposit of Redemption or Purchase
Price..    One Business Day prior to the redemption or purchase date, the Company will deposit with the Trustee or with the Paying Agent money sufficient to pay the redemption or purchase price of, and accrued interest on all
Notes to be redeemed or purchased on that date. The Trustee or the Paying Agent will promptly return to the Company any money deposited with the Trustee or the Paying Agent by the Company in excess of the amounts necessary to pay the redemption or
purchase price of, and accrued interest on, all Notes to be redeemed or purchased. 
 If the Company complies with the provisions of the
preceding paragraph, on and after the redemption or purchase date, interest will cease to accrue on the Notes or the portions of Notes called for redemption or purchase. If a Note is redeemed or purchased on or after an interest record date but on
or prior to the related interest payment date, then any accrued and unpaid interest shall be paid to the Person in whose name such Note was registered at the close of business on such record date. If any Note called for redemption or purchase is not
so paid upon 

  
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surrender for redemption or purchase because of the failure of the Company to comply with the preceding paragraph, interest shall be paid on the unpaid principal, from the redemption or purchase
date until such principal is paid, and to the extent lawful on any interest not paid on such unpaid principal, in each case at the rate provided in the Notes and in Section 4.01 hereof. 

Section 3.06.    Notes Redeemed or Purchased in Part. Upon surrender of a Note that is redeemed or
purchased in part, the Company will issue and, upon receipt of an Authentication Order, the Trustee will authenticate for the Holder at the expense of the Company a new Note equal in principal amount to the unredeemed or unpurchased portion of the
Note surrendered. 
 Section 3.07.    Optional Redemption. 

(a)    At any time prior to February 15, 2023, the Company may on any one or more occasions redeem up to 35% of the
original aggregate principal amount of Notes issued under this Supplemental Indenture (calculated after giving effect to any issuance of Additional Notes), upon not less than 15 nor more than 60 days’ notice, at a redemption price equal to
107.250% of the principal amount of the Notes redeemed, plus accrued and unpaid interest to but excluding the date of redemption (subject to the rights of Holders of Notes so called for redemption on or after a record date for the payment of
interest to receive interest on the relevant interest payment date as provided in Section 3.05 hereof), with an amount of cash no greater than the cash proceeds (net of underwriting discounts and commissions) of all Equity Offerings by the
Company since the Issue Date; provided that: 
 (1)    at least 65% (calculated after giving
effect to any issuance of Additional Notes) of the original aggregate principal amount of Notes issued under this Supplemental Indenture (excluding Notes held by the Company and its Subsidiaries) remains outstanding immediately after the occurrence
of such redemption; and 
 (2)    the redemption occurs within 120 days of the date of the closing of
such Equity Offering. 
 (b)    At any time prior to February 15, 2023 the Company may on any one or more occasions
redeem all or a part of the Notes, upon not less than 15 nor more than 60 days’ notice, at a redemption price equal to 100% of the principal amount of the Notes redeemed, plus the Applicable Premium (if any) as of, and accrued and unpaid
interest to but excluding the date of redemption, subject to the rights of Holders of Notes so called for redemption on or after a record date for the payment of interest to receive interest due on the relevant interest payment date as provided in
Section 3.05 hereof. 
 (c)    Except as expressly set forth in this Supplemental Indenture, the Notes will not be
redeemable at the Company’s option prior to February 15, 2023. 
 (d)    On or after February 15, 2023,
the Company may on any one or more occasions redeem all or a part of the Notes, upon not less than 15 nor more than 60 days’ notice, at the redemption prices (expressed as percentages of principal amount) set forth below, plus accrued and
unpaid interest on the Notes redeemed, to but excluding the applicable date of redemption, if redeemed during the twelve-month period beginning on February 15 of the years indicated below, subject to the rights of Holders of Notes so called for
redemption on or after a record date 

  
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for the payment of interest to receive interest on the relevant interest payment date as provided in Section 3.05 hereof: 

 

					
	 Year
	  	Percentage	 
	 2023
	  	 	105.438	% 
	 2024
	  	 	103.625	% 
	 2025
	  	 	101.813	% 
	 2026 and thereafter
	  	 	100.000	% 

 Unless the Company defaults in the payment of the redemption price, interest will cease to accrue on the Notes
or portions thereof called for redemption on the applicable redemption date. The Company may provide in the applicable notice of redemption that (x) payment of the redemption price and performance of the Company’s obligations with respect
to such redemption may be performed by another Person and (y) the redemption is subject to one or more conditions precedent. 

(e)    Any redemption pursuant to this Section 3.07 shall be made pursuant to the provisions of Sections 3.01 through
3.06 hereof. 
 Section 3.08    Mandatory Redemption. The Company is not required to make mandatory
redemption or sinking fund payments with respect to the Notes. 
 Section 3.09    Offer to Purchase by
Application of Excess Proceeds. In the event that, pursuant to Section 4.10 hereof, the Company is required to commence an offer to all Holders to purchase Notes (an “Asset Sale Offer”), it will follow the procedures
specified below. 
 The Asset Sale Offer shall be made to all Holders of Notes and all holders of other Indebtedness that is pari
passu with the Notes containing provisions similar to those set forth in this Supplemental Indenture with respect to offers to purchase, prepay or redeem with the proceeds of sales of assets. The Asset Sale Offer will remain open for a period of
at least 20 Business Days following its commencement and not more than 30 Business Days, except to the extent that a longer period is required by applicable law (the “Offer Period”). No later than three Business Days after the
termination of the Offer Period (the “Purchase Date”), the Company will apply all Excess Proceeds (the “Offer Amount”), to the purchase of Notes and such other pari passu Indebtedness (on a pro rata
basis based on the principal amount of Notes and such other pari passu Indebtedness surrendered, if applicable) or, if less than the Offer Amount has been tendered, all Notes and other Indebtedness tendered in response to the Asset Sale
Offer. Payment for any Notes so purchased will be made in the same manner as interest payments are made. 
 If the Purchase Date is on or
after an interest record date and on or before the related interest payment date, any accrued and unpaid interest will be paid to the Person in whose name a Note is registered at the close of business on such record date, and no additional interest
will be payable to Holders who tender Notes pursuant to the Asset Sale Offer. 
 Upon the commencement of an Asset Sale Offer, the Company
will send, by first class mail, a notice to the Trustee and each of the Holders, with a copy to the Trustee. The notice will 

  
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contain all instructions and materials necessary to enable such Holders to tender Notes pursuant to the Asset Sale Offer. The notice, which will govern the terms of the Asset Sale Offer, will
state: 
 (1)    that the Asset Sale Offer is being made pursuant to this Section 3.09 and
Section 4.10 hereof and the length of time the Asset Sale Offer will remain open; 
 (2)    the
Offer Amount, the purchase price and the Purchase Date; 
 (3)    that any Note not tendered or accepted
for payment will continue to accrue interest; 
 (4)    that, unless the Company defaults in making such
payment, any Note accepted for payment pursuant to the Asset Sale Offer will cease to accrue interest after the Purchase Date; 

(5)    that Holders electing to have a Note purchased pursuant to an Asset Sale Offer may elect to have
Notes purchased in denominations of $2,000 or an integral multiple of $1,000 in excess thereof; 

(6)    that Holders electing to have Notes purchased pursuant to any Asset Sale Offer, will be required to
surrender the Note, with the form entitled “Option of Holder to Elect Purchase” attached to the Notes completed, or transfer by book-entry transfer, to the Company, a Depositary, if appointed by the Company, or a Paying Agent at the
address specified in the notice at least three days before the Purchase Date; 
 (7)    that Holders will
be entitled to withdraw their election if the Company, the Depositary or the Paying Agent, as the case may be, receives, not later than the expiration of the Offer Period, a telegram, telex, facsimile transmission or letter setting forth the name of
the Holder, the principal amount of the Note the Holder delivered for purchase and a statement that such Holder is withdrawing his election to have such Note purchased; 

(8)    that, if the aggregate principal amount of Notes and other pari passu Indebtedness
surrendered by holders thereof exceeds the Offer Amount, the Trustee will select the Notes and the applicable agent will select such other pari passu Indebtedness to be purchased on a pro rata basis based on the principal amount of
Notes (or, in the case of Notes issued in global form, in accordance with the applicable procedures of DTC) and such other pari passu Indebtedness tendered or required to be prepaid or redeemed (with such adjustments as may be deemed
appropriate by the Company so that only Notes in denominations of $2,000, or an integral multiple of $1,000 in excess thereof, will be purchased); and 

(9)    that Holders whose Notes were purchased only in part will be issued new Notes equal in principal
amount to the unpurchased portion of the Notes surrendered (or transferred by book-entry transfer). 

  
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 On or before the Purchase Date, the Company will, to the extent lawful, accept for payment,
on a pro rata basis to the extent necessary, the Offer Amount of Notes or portions thereof tendered pursuant to the Asset Sale Offer, or if less than the Offer Amount has been tendered, all Notes tendered, and will deliver or cause to be
delivered to the Trustee the Notes properly accepted together with an Officer’s Certificate stating that such Notes or portions thereof were accepted for payment by the Company in accordance with the terms of this Section 3.09. The
Company, the Depositary or the Paying Agent, as the case may be, will promptly (but in any case not later than five days after the Purchase Date) mail or deliver to each tendering Holder an amount equal to the purchase price of the Notes tendered by
such Holder and accepted by the Company for purchase, and the Company will promptly issue a new Note, and the Trustee, upon written request from the Company, will authenticate and mail or deliver (or cause to be transferred by book entry) such new
Note to such Holder, in a principal amount equal to any unpurchased portion of the Note surrendered. Any Note not so accepted shall be promptly mailed or delivered by the Company to the Holder thereof. The Company will publicly announce the results
of the Asset Sale Offer on the Purchase Date. 
 Other than as specifically provided in this Section 3.09 or Section 4.10, any
purchase of Notes pursuant to this Section 3.09 shall be made pursuant to the applicable provisions of Sections 3.01 through 3.06 hereof. 

Notice of any redemption of, or any offer to purchase, the Notes may, at the Company’s discretion, be given in connection with an Equity
Offering, other transaction (or series of related transactions) or an event that constitutes a Change of Control and prior to the completion or the occurrence thereof, and any such redemption or purchase may, at the Company’s discretion, be
subject to one or more conditions precedent, including, but not limited to, completion or occurrence of the related Equity Offering, transaction or event, as the case may be. In addition, if such redemption or purchase is subject to satisfaction of
one or more conditions precedent, the notice of redemption or purchase shall describe each such condition, and if applicable, shall state that, in the Company’s discretion, the redemption or purchase may be delayed until such time (including
more than 60 days after the date the notice of redemption or offer to purchase was mailed or delivered, including by electronic transmission) as any or all such conditions shall be satisfied or waived, or such redemption or purchase may not occur
and such notice may be rescinded in the event that any or all such conditions shall not have been satisfied or waived by the redemption or purchase date or by the redemption or purchase date as so delayed, or such notice or offer may be rescinded at
any time in the Company’s discretion if in the good faith judgment of the Company any or all of such conditions will not be satisfied or waived. In no event shall the Trustee be responsible for monitoring, or charged with knowledge of, the
maximum aggregate amount of the Notes eligible under this Supplemental Indenture to be redeemed. 
 ARTICLE 4 

COVENANTS 

Section 4.01.    Payment of Notes. The Company will pay or cause to be paid the principal of, premium on, if
any, and interest on, the Notes on the Business Day prior to the dates and in the manner provided in the Notes. Principal, premium, if any, and interest will be considered paid on the date due if the Paying Agent, if other than the Company or a
Subsidiary 

  
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thereof, holds as of 10:00 a.m. Eastern Time on the due date money deposited by the Company in immediately available funds and designated for and sufficient to pay all principal, premium, if any,
and interest, if any, then due. 
 The Company will pay interest (including post-petition interest in any proceeding under any Bankruptcy
Law) on overdue principal at a rate that is 1% higher than the then applicable interest rate on the Notes to the extent lawful; it will pay interest (including post-petition interest in any proceeding under any Bankruptcy Law) on overdue
installments of interest (without regard to any applicable grace period), at the same rate to the extent lawful. 

Section 4.02.    Maintenance of Office or Agency. The Company will maintain an office or agency (which may be
an office of the Trustee or an affiliate of the Trustee, Registrar or co-registrar) where Notes may be surrendered for registration of transfer or for exchange and where notices and demands to or upon the
Company in respect of the Notes and this Supplemental Indenture may be served. The Company will give prompt written notice to the Trustee of the location, and any change in the location, of such office or agency. If at any time the Company fails to
maintain any such required office or agency or fails to furnish the Trustee with the address thereof, such presentations, surrenders, notices and demands may be made or served at the Corporate Trust Office of the Trustee. 

The Company may also from time to time designate one or more other offices or agencies where the Notes may be presented or surrendered for any
or all such purposes and may from time to time rescind such designations. The Company will give prompt written notice to the Trustee of any such designation or rescission and of any change in the location of any such other office or agency. 

The Company hereby designates the Corporate Trust Office of the Trustee as one such office or agency of the Company in accordance with
Section 2.03 hereof. 
 Section 4.03.    Reports. 

(a)    Whether or not required by the rules and regulations of the SEC, so long as any Notes are outstanding, the Company
will furnish to the Trustee and to the Holders of Notes (or file with the SEC for public availability), within the time periods specified in the SEC’s rules and regulations (and, during any period in which the Company is not required to file
reports with the SEC, within the time periods specified in the SEC’s rules and regulations for a “non-accelerated filer”): 

(1)    all quarterly and annual reports that would be required to be filed with the SEC on Forms 10-Q and 10-K if the Company were required to file such reports, including a “Management’s Discussion and Analysis of Financial Condition and Results of
Operations” and, with respect to the annual information only, a report thereon by the Company’s certified independent accountants; and 

(2)    all current reports that would be required to be filed with the SEC on Form 8-K if the Company were required to file such reports. 

  
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 All such reports will be prepared in all material respects in accordance with all of the
rules and regulations applicable to such reports, provided that if the Company is not required to file such reports with the SEC, (i) such quarterly and annual reports need only include information to the extent similar information is included
or incorporated by reference in the Prospectus and (ii) such current reports need only be prepared or delivered if the Company determines in good faith that the information to be reported is material to the Holders of Notes or the business,
operations, assets, liabilities or financial position of the Company and its Restricted Subsidiaries, taken as a whole. If the Company is not required to file such reports with the SEC, it will post such reports on its website
(http://www.hecla-mining.com). Whether the Company files such reports with the SEC or posts its reports on its website, the public posting of such reports shall satisfy any requirement hereunder to deliver such reports to Holders of Notes.
The terms of this Supplemental Indenture shall not impose any duty on the Company under the Sarbanes-Oxley Act of 2002 and the related SEC rules that would not otherwise be applicable to it. 

(b)    If the Company has designated any of its Subsidiaries as Unrestricted Subsidiaries, then the quarterly and annual
financial information required by paragraph (a) of this Section 4.03 will include a reasonably detailed presentation, either on the face of the financial statements or in the footnotes thereto, and in “Management’s Discussion and
Analysis of Financial Condition and Results of Operations,” of the financial condition and results of operations of the Company and its Restricted Subsidiaries separate from the financial condition and results of operations of the Unrestricted
Subsidiaries of the Company. 
 (c)    For so long as any Notes remain outstanding, if at any time they are not required
to file with the SEC the reports required by paragraphs (a) and (b) of this Section 4.03, the Company and the Guarantors will furnish to the Holders and to securities analysts and prospective investors, upon their request, the information
required to be delivered pursuant to Rule 144A(d)(4) under the Securities Act. 
 (d)    Delivery of such reports,
information and documents to the Trustee is for informational purposes only and the Trustee’s receipt of such shall not constitute constructive notice of any information contained therein or determinable from information contained therein,
including the Company’s compliance with any of its covenants hereunder (as to which the Trustee is entitled to rely exclusively on an Officer’s Certificate). 

Section 4.04.    Compliance Certificate. 

(a)    The Company and each Guarantor (to the extent that such Guarantor is so required under the TIA) shall deliver to the
Trustee, within 90 days after the end of each fiscal year beginning with the fiscal year ending December 31, 2020, an Officer’s Certificate stating that a review of the activities of the Company and its Restricted Subsidiaries during the
preceding fiscal year has been made under the supervision of the signing Officers with a view to determining whether the Company has kept, observed, performed and fulfilled its obligations under this Supplemental Indenture, and further stating, as
to each such Officer signing such certificate, that to the best of his or her knowledge the Company has kept, observed, performed and fulfilled each and every covenant contained in this Supplemental Indenture and is not in default in the performance
or observance of any of the terms, provisions and conditions of this 

  
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Supplemental Indenture (or, if a Default or Event of Default has occurred, describing all such Defaults or Events of Default of which he or she may have knowledge and what action the Company is
taking or proposes to take with respect thereto) and that to the best of his or her knowledge no event has occurred and remains in existence by reason of which payments on account of the principal of, premium on, if any, or interest on the Notes is
prohibited or if such event has occurred, a description of the event and what action the Company is taking or proposes to take with respect thereto. 

(b)    So long as any of the Notes are outstanding, the Company will deliver to the Trustee, within five calendar days (or
if such fifth calendar day is not a Business Day, the next succeeding Business Day) after any Officer becoming aware of any Default or Event of Default, an Officer’s Certificate specifying such Default or Event of Default and what action the
Company is taking or proposes to take with respect thereto. 
 Section 4.05.    Taxes. The Company will pay,
and will cause each of its Subsidiaries to pay, prior to delinquency, all material taxes, assessments, and governmental levies except such as are contested in good faith and by appropriate proceedings or where the failure to effect such payment is
not adverse in any material respect to the Holders of the Notes. 
 Section 4.06.    Stay,
Extension and Usury Laws. The Company and each of the Guarantors covenants (to the extent that it may lawfully do so) that it will not at any time insist upon, plead, or in any manner whatsoever claim or take the benefit or advantage of, any
stay, extension or usury law wherever enacted, now or at any time hereafter in force, that may affect the covenants or the performance of this Supplemental Indenture; and the Company and each of the Guarantors (to the extent that it may lawfully do
so) hereby expressly waives all benefit or advantage of any such law, and covenants that it will not, by resort to any such law, hinder, delay or impede the execution of any power herein granted to the Trustee, but will suffer and permit the
execution of every such power as though no such law has been enacted. 
 Section 4.07.    Restricted
Payments. 
 (a)    The Company will not, and will not permit any of its Restricted Subsidiaries to, directly or
indirectly: 
 (1)    declare or pay any dividend or make any other payment or distribution on account of
the Company’s or any of its Restricted Subsidiaries’ Equity Interests (including, without limitation, any payment in connection with any merger or consolidation involving the Company or any of its Restricted Subsidiaries) or to the direct
or indirect holders of the Company’s or any of its Restricted Subsidiaries’ Equity Interests in their capacity as such (other than dividends or distributions payable in Equity Interests (other than Disqualified Stock) of the Company and
other than dividends or distributions payable to the Company or a Restricted Subsidiary of the Company); 

(2)    purchase, redeem or otherwise acquire or retire for value (including, without limitation, in
connection with any merger or consolidation involving the Company) any Equity Interests of the Company or any Person owning more than 50% of the outstanding Equity Interests of the Company; 

  
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 (3)    make any payment on or with respect to, or
purchase, redeem, defease or otherwise acquire or retire for value any Indebtedness of the Company or any Guarantor that is contractually subordinated to the Notes or to any Note Guarantee (excluding any intercompany Indebtedness between or among
the Company and any of its Restricted Subsidiaries), except a payment of interest or principal at the Stated Maturity thereof; or 

(4)    make any Restricted Investment 

(all such payments and other actions set forth in these clauses (1) through (4) above being collectively referred to as “Restricted
Payments”), unless, at the time of and after giving effect to such Restricted Payment: 

(1)    no Default or Event of Default has occurred and is continuing or would occur as a consequence of
such Restricted Payment; 
 (2)    the Company would, at the time of such Restricted Payment and after
giving pro forma effect thereto as if such Restricted Payment had been made at the beginning of the applicable four-quarter period, have been permitted to incur at least $1.00 of additional Indebtedness pursuant to the Fixed Charge Coverage Ratio
test set forth in Section 4.09(a) hereof; and 
 (3)    such Restricted Payment, together with the
aggregate amount of all other Restricted Payments made by the Company and its Restricted Subsidiaries since April 12, 2013 (excluding Restricted Payments permitted by clauses (2), (3), (4), (5), (6), (7), (8), (9) and (12) of paragraph
(b) of this Section 4.07), is less than the sum, without duplication, of: 
 (A)    50% of the
Consolidated Net Income of the Company for the period (taken as one accounting period) from April 1, 2013 to the end of the Company’s most recently ended fiscal quarter for which internal financial statements are available at the time of
such Restricted Payment (or, if such Consolidated Net Income for such period is a deficit, less 100% of such deficit); plus 

(B)    100% of the aggregate net cash proceeds and the Fair Market Value, as determined in good faith by
the Board of Directors of the Company, of property and marketable securities received by the Company since April 12, 2013 as a contribution to its common equity capital or from the issue or sale of Qualifying Equity Interests of the Company or
from the issue or sale of convertible or exchangeable Disqualified Stock of the Company or convertible or exchangeable debt securities of the Company, in each case that have been converted into or exchanged for Qualifying Equity Interests of the
Company (other than Qualifying Equity Interests and convertible or exchangeable Disqualified Stock or debt securities sold to a Subsidiary of the Company); plus 

(C)    to the extent that any Restricted Investment that was made after April 12, 2013 is
(a) sold or otherwise cancelled, liquidated or repaid, or (b) made in an entity that subsequently becomes a Restricted Subsidiary of the Company 

  
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that is a Guarantor, the initial amount of such Restricted Investment (or, if less, the amount of cash or the Fair Market Value, as determined in good faith by the Board of Directors of the
Company, of property and marketable securities, in each case received upon repayment or sale); plus 

(D)    to the extent that any Unrestricted Subsidiary of the Company designated as such after the date of
this Supplemental Indenture is redesignated as a Restricted Subsidiary after April 12, 2013, the lesser of (i) the Fair Market Value of the Company’s Restricted Investment in such Subsidiary as of the date of such redesignation or
(ii) such Fair Market Value as of the date on which such Subsidiary was originally designated as an Unrestricted Subsidiary after the date of this Supplemental Indenture; plus 

(E)    100% of any dividends received in cash and the Fair Market Value
             , as determined in good faith by the Board of Directors of the Company, of property and marketable securities received by the Company or a Restricted Subsidiary of the Company
that is a Guarantor after April 12, 2013 from an Unrestricted Subsidiary of the Company, to the extent that such dividends were not otherwise included in the Consolidated Net Income of the Company for such period. 

(b)    The provisions of Section 4.07(a) hereof will not prohibit: 

(1)    the payment of any dividend or the consummation of any irrevocable redemption within 60 days after
the date of declaration of the dividend or giving of the redemption notice, as the case may be, if at the date of declaration or notice, the dividend or redemption payment would have complied with the provisions of this Supplemental Indenture; 

(2)    the making of any Restricted Payment in exchange for, or out of or with the net cash proceeds of the
substantially concurrent sale (other than to a Subsidiary of the Company) of, Equity Interests of the Company (other than Disqualified Stock) or from the substantially concurrent contribution of common equity capital to the Company; provided
that the amount of any such net cash proceeds that are utilized for any such Restricted Payment will not be considered to be net proceeds of Qualifying Equity Interests for purposes of Section 4.07(a)(3)(B) and will not be considered to be net
cash proceeds from an Equity Offering for purposes of Section 3.07 of this Supplemental Indenture; 

(3)    the payment of any dividend (or, in the case of any partnership or limited liability company, any
similar distribution) by a Restricted Subsidiary of the Company to the holders of its Equity Interests on a pro rata basis; 

(4)    the repurchase, redemption, defeasance or other acquisition or retirement for value of Indebtedness
of the Company or any Guarantor that is contractually subordinated to the Notes or to any Note Guarantee with the net cash proceeds from a substantially concurrent incurrence of Permitted Refinancing Indebtedness; 

  
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 (5)    so long as no Default or Event of Default has
occurred and is continuing, the repurchase, redemption or other acquisition or retirement for value of any Equity Interests of the Company or any Restricted Subsidiary of the Company held by any current or former officer, director, employee or
consultant of the Company or any of its Restricted Subsidiaries pursuant to any management equity plan or stock option plan, shareholders’ agreement or any other management or employee benefit plan or agreement or arrangement; provided
that the aggregate price paid for all such repurchased, redeemed, acquired or retired Equity Interests may not exceed $15.0 million in any twelve-month period (with unused amounts in any twelve-month period being carried over to the succeeding
twenty-four month period); provided further, that such amount in any twelve-month period may be increased by an amount not to exceed: 

(A)    the cash proceeds from the sale of Qualifying Equity Interests of the Company and, to the extent
contributed to the Company as common equity capital, the cash proceeds from the sale of Qualifying Equity Interests of any of the Company’s direct or indirect parent companies, in each case to members of management, directors or consultants of
the Company, any of its Subsidiaries or any of its direct or indirect parent companies that occurs after the date of this Supplemental Indenture to the extent the cash proceeds from the sale of Qualifying Equity Interests have not otherwise been
applied to the making of Restricted Payments pursuant to the second clause (3) of Section 4.07(a) or Section 4.07(b)(2); plus 

(B)    the cash proceeds of key man life insurance policies received by the Company or its Restricted
Subsidiaries after the date of this Supplemental Indenture; and 
 in addition, cancellation of Indebtedness owing to the Company from any
current or former officer, director or employee (or any permitted transferees thereof) of the Company or any of its Restricted Subsidiaries (or any direct or indirect parent company thereof), in connection with a repurchase of Equity Interests of
the Company from such Persons will not be deemed to constitute a Restricted Payment for purposes of this Section 4.07 or any other provisions of this Supplemental Indenture; 

(6)    the repurchase, acquisition or retirement for value of Equity Interests (a) deemed to occur
upon the exercise of stock options, warrants, rights to acquire Equity Interests or other convertible securities to the extent such Equity Interests represent a portion of the exercise price of those stock options or warrants, or (b) in
connection with the withholding of a portion of the Equity Interests granted or awarded to an employee to pay for the taxes payable by such employee upon such grant or award; 

(7)    so long as no Default or Event of Default has occurred and is continuing, the declaration and
payment of regularly scheduled or accrued dividends to holders of any class or series of Disqualified Stock of the Company or any preferred stock of any Restricted Subsidiary of the Company issued on or after the date of this Supplemental Indenture
in accordance with the Fixed Charge Coverage Ratio test described in Section 4.09(a) hereof; 

  
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 (8)    payments of cash, dividends, distributions,
advances or other Restricted Payments by the Company or any of its Restricted Subsidiaries to allow the payment of cash in lieu of the issuance of fractional shares upon (i) the exercise of options or warrants or (ii) the conversion or
exchange of Capital Stock of any Person (including in a merger, consolidation, amalgamation or similar transaction) and payments of cash to dissenting shareholders in connection with a merger, consolidation, amalgamation, transfer of assets; 

(9)    the repurchase, redemption or other acquisition or retirement for value of any Indebtedness that is
contractually subordinated to the Notes or to any Note Guarantee (a) at a purchase price not greater than 101% of the principal amount of such Indebtedness in the event of a Change of Control pursuant to provisions similar to Section 4.15
hereof or (b) at a purchase price not greater than 100% of the principal amount of such Indebtedness pursuant to provisions similar to Section 4.10 hereof; provided that all Notes tendered by Holders of the Notes in connection with
the related Change of Control Offer or Asset Sale Offer, as applicable, have been repurchased, redeemed or acquired for value; 

(10)    the making by the Company of regular quarterly and/or annual dividend payments in respect of its
outstanding Series B Cumulative Convertible Preferred Stock, par value $0.25 per share, which are payable pursuant to the terms of such preferred stock; 

(11)    (a) the making by the Company of quarterly and/or annual dividend payments in respect of its
outstanding common stock or, (b) so long as no Default or Event of Default has occurred and is continuing, the purchase of Equity Interests of the Company, together, in an aggregate amount not to exceed $55.0 million in any fiscal year
(with unused amounts in any fiscal year carried over to the immediately succeeding fiscal year); and 

(12)    so long as no Default or Event of Default has occurred and is continuing, other Restricted Payments
in an aggregate amount not to exceed $75.0 million since the date of this Supplemental Indenture. 
 (c)    The
amount of all Restricted Payments (other than cash) will be the Fair Market Value on the date of the Restricted Payment of the asset(s) or securities proposed to be transferred or issued by the Company or such Restricted Subsidiary, as the case may
be, pursuant to the Restricted Payment. The Fair Market Value of any assets or securities that are required to be valued by this Section 4.07 will be determined by the Board of Directors of the Company whose resolution with respect thereto will
be delivered to the Trustee. 
 (d)    For purposes of determining compliance with this covenant, if a Restricted
Payment meets the criteria or more than one of the exceptions described in clauses (1) through (12) above or is entitled to be made according to the Section 4.07(a), the Company may, in its sole discretion, classify the Restricted Payment
in any manner that complies with this Section 4.07. 

  
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 Section 4.08.    Dividend and Other Payment Restrictions
Affecting Restricted Subsidiaries. 
 (a)    The Company will not, and will not permit any of its Restricted
Subsidiaries to, directly or indirectly, create or permit to exist or become effective any consensual encumbrance or restriction on the ability of any Restricted Subsidiary to: 

(1)    pay dividends or make any other distributions on its Capital Stock to the Company or any of its
Restricted Subsidiaries, or with respect to any other interest or participation in, or measured by, its profits, or pay any indebtedness owed to the Company or any of its Restricted Subsidiaries (it being understood that the priority of any
preferred stock in receiving dividends or liquidating distributions prior to dividends or liquidating distributions being paid on common stock shall not be deemed a restriction on the ability to make distributions on Capital Stock); 

(2)    make loans or advances to the Company or any of its Restricted Subsidiaries (it being understood
that the subordination of loans or advances made to the Company or any Restricted Subsidiary to other Indebtedness incurred by the Company or any Restricted Subsidiary shall not be deemed a restriction on the ability to make loans or advances); or

 (3)    sell, lease or transfer any of its properties or assets to the Company or any of its Restricted
Subsidiaries (it being understood that such transfers shall not include any type of transfer described in clauses (1) and (2) of this Section 4.08(a)). 

(b)    The restrictions in Section 4.08(a) hereof will not apply to encumbrances or restrictions existing under or by
reason of: 
 (1)    agreements governing Existing Indebtedness and Credit Facilities as in effect on the
date of this Supplemental Indenture (including the Senior Credit Facility) and any amendments, restatements, modifications, renewals, supplements, refundings, replacements or refinancings of those agreements; provided that the amendments,
restatements, modifications, renewals, supplements, refundings, replacements or refinancings, in the good faith judgment of the Company, (x) are not materially more restrictive, taken as a whole, with respect to such dividend and other payment
restrictions than those contained in those agreements on the date of this Supplemental Indenture and (y) will not materially affect the Company’s ability to make anticipated principal and interest payments on the Notes when due; 

(2)    this Supplemental Indenture, the Notes and the Note Guarantees; 

(3)    agreements governing other Indebtedness permitted to be incurred under Section 4.09 hereof and
any amendments, restatements, modifications, renewals, supplements, refundings, replacements or refinancings of those agreements; provided that in the good faith judgment of the Company, such encumbrances and restrictions will not materially
affect the Company’s ability to make anticipated principal and interest payments on the Notes when due; 

  
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 (4)    applicable law, rule, regulation or order; 

(5)    any instrument governing Indebtedness or Capital Stock of a Person acquired by the Company or any of
its Restricted Subsidiaries as in effect at the time of such acquisition (except to the extent such Indebtedness or Capital Stock was incurred in connection with or in contemplation of such acquisition), which encumbrance or restriction is not
applicable to any Person, or the properties or assets of any Person, other than the Person, or the property or assets of the Person, so acquired; provided that, in the case of Indebtedness, such Indebtedness was permitted by the terms of this
Supplemental Indenture to be incurred; 
 (6)    non-assignment
provisions in leases, subleases, licenses and other contracts entered into in the ordinary course of business, including, without limitation, any encumbrance or restriction (a) that restricts the subletting, assignment or transfer of any
property or asset that is subject to a lease, license or similar contract, or the assignment or transfer of such lease, license or other contract; and (b) pursuant to provisions restricting the dispositions of real property interests set forth
in any reciprocal easement agreements of the Company or any Restricted Subsidiary; 
 (7)    purchase
money obligations for property acquired in the ordinary course of business and Attributable Debt or Capital Lease Obligations that impose restrictions on the property purchased or leased of the nature described in clause (3) of
Section 4.08(a) hereof; 
 (8)    any agreement for the sale or other disposition of all or a
portion of the Capital Stock or assets of a Restricted Subsidiary that restricts distributions by that Restricted Subsidiary pending its sale or other disposition; 

(9)    Permitted Refinancing Indebtedness; provided that, in the good faith judgment of the Company,
the encumbrances and restrictions contained in the agreements governing such Permitted Refinancing Indebtedness are not materially more restrictive, taken as a whole, than those contained in the agreements governing the Indebtedness being
refinanced; 
 (10)    Liens permitted to be incurred under the provisions of Section 4.12 hereof
that limit the right of the debtor to dispose of the assets subject to such Liens, including any Permitted Lien; 

(11)    provisions limiting the disposition or distribution of assets or property in joint venture
agreements, asset sale agreements, sale-leaseback agreements, stock sale agreements and other similar agreements (including agreements entered into in connection with a Restricted Investment), which limitation is applicable only to the assets that
are the subject of such agreements; and 
 (12)    restrictions on cash or other deposits or net worth
imposed by customers under contracts entered into in the ordinary course of business. 

  
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 Section 4.09.    Incurrence of Indebtedness and Issuance of
Preferred Stock. 
 (a)    The Company will not, and will not permit any of its Restricted Subsidiaries to, directly
or indirectly, create, incur, issue, assume, guarantee or otherwise become directly or indirectly liable, contingently or otherwise, with respect to (collectively, “incur”) any Indebtedness (including Acquired Debt), and the Company
will not issue any Disqualified Stock and will not permit any of its Restricted Subsidiaries to issue any shares of preferred stock; provided, however, that the Company may incur Indebtedness (including Acquired Debt) or issue
Disqualified Stock, and the Guarantors may incur Indebtedness (including Acquired Debt) or issue preferred stock, if the Fixed Charge Coverage Ratio for the Company’s most recently ended four full fiscal quarters for which internal financial
statements are available immediately preceding the date on which such additional Indebtedness is incurred or such Disqualified Stock or such preferred stock is issued, as the case may be, would have been at least 2.0 to 1.0, determined on a pro
forma basis (including a pro forma application of the net proceeds therefrom), as if the additional Indebtedness had been incurred or the Disqualified Stock or the preferred stock had been issued, as the case may be, at the beginning of such
four-quarter period. 
 (b)    The provisions of Section 4.09(a) hereof will not prohibit the incurrence of any of
the following items of Indebtedness (collectively, “Permitted Debt”): 
 (1)    the
incurrence by the Company and any Guarantor of Indebtedness and letters of credit under Credit Facilities in an aggregate principal amount at any one time outstanding under this clause (1) (with letters of credit being deemed to have a principal
amount equal to the maximum amount drawable thereunder) not to exceed, as of any date of incurrence, $250.0 million. 

(2)    the incurrence by the Company and its Restricted Subsidiaries of the Existing Indebtedness; 

(3)    the incurrence by the Company and the Guarantors of Indebtedness represented by the Notes and the
related Note Guarantee to be issued on the date of this Supplemental Indenture or thereafter as provided in this Supplemental Indenture; 

(4)    the incurrence by the Company or any of its Restricted Subsidiaries of Indebtedness represented by
Capital Lease Obligations (other than Deemed Capitalized Leases), mortgage financings or purchase money obligations, in each case, incurred for the purpose of financing all or any part of the purchase price or cost of design, construction,
installation or improvement of property, plant or equipment used in the business of the Company or any of its Restricted Subsidiaries, in an aggregate principal amount at any time outstanding, including all Permitted Refinancing Indebtedness
incurred to renew, refund, refinance, replace, defease or discharge any Indebtedness incurred pursuant to this clause (4), not to exceed, as of any date of incurrence, the greater of (x) $85.0 million and (y) 4.25% of Consolidated Net Tangible
Assets as of such date of incurrence; 
 (5)    the incurrence by the Company or any of its Restricted
Subsidiaries of Permitted Refinancing Indebtedness in exchange for, or the net proceeds of which are 

  
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used to renew, refund, refinance, replace, defease or discharge any Indebtedness (other than intercompany Indebtedness) that was permitted by this Supplemental Indenture to be incurred under
Section 4.09(a) hereof or clauses (2), (3), (4), (5) or (21) of this Section 4.09(b); 

(6)    the incurrence by the Company or any of its Restricted Subsidiaries of intercompany Indebtedness
between or among the Company and any of its Restricted Subsidiaries; provided, however, that: 

(A)    if the Company or any Guarantor is the obligor on such Indebtedness and the payee is not the Company
or a Guarantor, such Indebtedness must be unsecured and expressly subordinated to the prior payment in full in cash of all Obligations then due with respect to the Notes, in the case of the Company, or the Note Guarantee, in the case of a Guarantor;
and 
 (B)    (1) any subsequent issuance or transfer of Equity Interests that results in any such
Indebtedness being held by a Person other than the Company or a Restricted Subsidiary of the Company and (2) any sale or other transfer of any such Indebtedness to a Person that is not either the Company or a Restricted Subsidiary of the
Company, will be deemed, in each case, to constitute an incurrence of such Indebtedness by the Company or such Restricted Subsidiary, as the case may be, that was not permitted by this clause (6); 

(7)    the issuance by any of the Company’s Restricted Subsidiaries to the Company or to any of its
Restricted Subsidiaries of shares of preferred stock; provided, however, that: 

(A)    any subsequent issuance or transfer of Equity Interests that results in any such preferred stock
being held by a Person other than the Company or a Restricted Subsidiary of the Company; and 

(B)    any sale or other transfer of any such preferred stock to a Person that is not either the Company or
a Restricted Subsidiary of the Company, 
 will be deemed, in each case, to constitute an issuance of such preferred stock by such Restricted
Subsidiary that was not permitted by this clause (7); 
 (8)    the incurrence by the Company or any of
its Restricted Subsidiaries of Indebtedness consisting of Hedging Obligations or Treasury Management Arrangements in the ordinary course of business; 

(9)    the guarantee by the Company or any of the Guarantors of Indebtedness of the Company or a Restricted
Subsidiary of the Company to the extent that the guaranteed Indebtedness was permitted to be incurred by another provision of this Section 4.09; provided that if the Indebtedness being guaranteed is subordinated to or pari passu
with the Notes, then the Guarantee must be subordinated or pari passu, as applicable, to the same extent as the Indebtedness guaranteed; 

  
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 (10)    the incurrence by the Company or any of its
Restricted Subsidiaries of Indebtedness in respect of workers’ compensation claims, health, disability or other employee benefits or property, casualty or liability insurance, self-insurance obligations, bankers’ acceptances, performance,
bid, surety, appeal, remediation and similar bonds and completion Guarantees (not for borrowed money) provided in the ordinary course of business; 

(11)    the incurrence by the Company or any of its Restricted Subsidiaries of Indebtedness arising from
the honoring by a bank or other financial institution of a check, draft or similar instrument inadvertently drawn against insufficient funds, so long as such Indebtedness is covered within five Business Days; 

(12)    Indebtedness of any Person incurred and outstanding on or prior to the date on which such Person
became a Restricted Subsidiary of the Company or was acquired by, or merged into or arranged or consolidated with, the Company or any of its Restricted Subsidiaries (other than Indebtedness incurred in contemplation of, or in connection with, the
transaction or series of related transactions pursuant to which such Person became a Restricted Subsidiary of or was otherwise acquired by the Company); provided, however, that on the date that such Person became a Restricted
Subsidiary or was otherwise acquired by the Company, either: (a) the Company would have been able to incur $1.00 of additional Indebtedness pursuant to Section 4.09(a) hereof after giving effect to the incurrence of such Indebtedness
pursuant to this clause (12); or (b) the Fixed Charge Coverage Ratio of the Company and its Restricted Subsidiaries would have been greater than such ratio immediately prior to such acquisition, merger, arrangement or consolidation, in each
case after giving effect to the incurrence of such Indebtedness pursuant to this clause (12); 

(13)    Indebtedness consisting of unpaid insurance premiums owed to any Person providing property,
casualty, liability or other insurance to the Company or any Restricted Subsidiary in any fiscal year, pursuant to reimbursement or indemnification obligations to such Person; provided that such Indebtedness is incurred only to defer the cost
of such unpaid insurance premiums for such fiscal year and is outstanding only during such fiscal year; 

(14)    Indebtedness of the Company, to the extent the net proceeds thereof are substantially concurrently
(a) used to purchase Notes tendered in connection with a Change of Control Offer or (b) deposited to defease the Notes pursuant to Articles 8 hereof or pursuant to Article 11 hereof; 

(15)    Indebtedness arising from agreements of the Company or a Restricted Subsidiary providing for
indemnification, adjustment of purchase price, earn-outs or similar obligations, in each case, incurred or assumed in connection with the disposition of any business, assets or Capital Stock of a Subsidiary, other than guarantees of Indebtedness
incurred by any Person acquiring all or any portion of such business, assets or Capital Stock of a Subsidiary for the purpose of financing such acquisition; 

  
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 (16)    Indebtedness arising in connection with
endorsement of instruments for deposit in the ordinary course of business; 
 (17)    Indebtedness owed
to a Person controlled or supervised by and acting as an agency or instrumentality of the United States of America, Canada or Mexico in connection with the settlement or other resolution of any claim or dispute which may arise from time to time with
any such agency; 
 (18)    Indebtedness related to surety bonds or cash collateral posted by the Company
or any of its Restricted Subsidiaries from time to time in order to secure reclamation obligations; 

(19)    Indebtedness of the Company or any of its Restricted Subsidiaries consisting of take-or-pay obligations contained in supply arrangements incurred in the ordinary course of business; 

(20)    Indebtedness representing deferred compensation to employees of the Company or any of its
Restricted Subsidiaries in the ordinary course of business; and 
 (21)    the incurrence by the Company
or any of its Restricted Subsidiaries of additional Indebtedness in an aggregate principal amount (or accreted value, as applicable) at any time outstanding, including all Permitted Refinancing Indebtedness incurred to renew, refund, refinance,
replace, defease or discharge any Indebtedness incurred pursuant to this clause (21), not to exceed, as of any date of incurrence, the greater of (x) $110.0 million and (y) 5.5% of Consolidated Net Tangible Assets as of such date of incurrence.

 The Company will not incur, and will not permit any Guarantor to incur, any Indebtedness (including Permitted Debt) that is contractually
subordinated in right of payment to any other Indebtedness of the Company or such Guarantor unless such Indebtedness will be contractually subordinated in right of payment to the Notes and the applicable Note Guarantee to at least the same extent as
such other Indebtedness; provided, however, that no Indebtedness will be deemed to be contractually subordinated in right of payment to any other Indebtedness of the Company solely by virtue of being unsecured or by virtue of being
secured on a junior priority basis. 
 For purposes of determining compliance with this Section 4.09, in the event that an item of
Indebtedness meets the criteria of more than one of the categories of Permitted Debt described in clauses (1) through (21) above, or is entitled to be incurred pursuant to Section 4.09(a) hereof, the Company will be permitted to classify
such item of Indebtedness on the date of its incurrence, or later reclassify all or a portion of such item of Indebtedness, in any manner that complies with this Section 4.09, Indebtedness under Credit Facilities outstanding on the date on
which the Notes are first issued and authenticated under this Supplemental Indenture will initially be deemed to have been incurred in reliance on the exception provided by clause (1) of the definition of Permitted Debt. The accrual of interest
or preferred stock dividends, the accretion or amortization of original issue discount, the payment of interest on any Indebtedness in the form of additional Indebtedness with the same terms, the reclassification of preferred stock


  
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as Indebtedness due to a change in accounting principles, and the payment of dividends on preferred stock or Disqualified Stock in the form of additional shares of the same class of preferred
stock or Disqualified Stock will not be deemed to be an incurrence of Indebtedness or an issuance of preferred stock or Disqualified Stock for purposes of this Section 4.09; provided, in each such case, that the amount thereof is
included in Fixed Charges of the Company as accrued. For purposes of determining compliance with any U.S. dollar-denominated restriction on the incurrence of Indebtedness, the U.S. dollar-equivalent principal amount of Indebtedness denominated in a
foreign currency shall be utilized, calculated based on the relevant currency exchange rate in effect on the date such Indebtedness was incurred. Notwithstanding any other provision of this Section 4.09, the maximum amount of Indebtedness that
the Company or any Restricted Subsidiary may incur pursuant to this Section 4.09 shall not be deemed to be exceeded solely as a result of fluctuations in exchange rates or currency values. 

The amount of any Indebtedness outstanding as of any date will be: 

(22)    the accreted value of the Indebtedness, in the case of any Indebtedness issued with original issue
discount; 
 (23)    with respect to contingent obligations, the maximum liability upon the occurrences
of the contingency giving rise to the obligations; 
 (24)    with respect to Hedging Obligations, the
net amount payable, if any, by such Persons of such Hedging Obligations terminated at that time due to default by such Persons 

(25)    the principal amount of the Indebtedness, in the case of any other Indebtedness; and 

(26)    in respect of Indebtedness of another Person secured by a Lien on the assets of the specified
Person, the lesser of: 
 (A)    the Fair Market Value of such assets at the date of determination; and

 (B)    the amount of the Indebtedness of the other Person. 

Section 4.10.    Asset Sales. 

(a)    The Company will not, and will not permit any of its Restricted Subsidiaries to, consummate an Asset Sale unless:

 (1)    the Company (or the Restricted Subsidiary, as the case may be) receives consideration at the
time of the Asset Sale at least equal to the Fair Market Value (measured as of the date of the definitive agreement with respect to such Asset Sale) of the assets or Equity Interests issued or sold or otherwise disposed of; and 

  
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 (2)    solely with respect to any Asset Sales of any of
the Principal Mine Assets, at least 75% of the consideration received in the Asset Sale by the Company or such Restricted Subsidiary is in the form of cash or Cash Equivalents. For purposes of this provision, each of the following will be deemed to
be cash: 
 (A)    any liabilities of the Company or any Restricted Subsidiary (other than contingent
liabilities and liabilities that are by their terms subordinated to the Notes or any Note Guarantee) that are assumed by the transferee of any such assets pursuant to a customary novation or indemnity agreement that releases the Company or such
Restricted Subsidiary from or indemnifies the Company or such Restricted Subsidiary against such liability; 

(B)    any securities, notes or other obligations received by the Company or any such Restricted Subsidiary
from such transferee that are converted by the Company or such Restricted Subsidiary into cash within 120 days after such Asset Sale, to the extent of the cash received in that conversion; 

(C)    any Designated Non-cash Consideration received by the
Company or any of its Restricted Subsidiaries in such Asset Sale having an aggregate Fair Market Value, taken together with all other Designated Non-cash Consideration received pursuant to this clause
(C) that has at that time not been converted in cash or a Cash Equivalent, not to exceed the greater of (x) $80.0 million and (y) 4.00% of Consolidated Net Tangible Assets at the time of the receipt of such Designated Non-cash Consideration (with the Fair Market Value of each item of Designated Non-cash Consideration being measured at the time received and without giving effect to
subsequent changes in value); and 
 (D)    any stock or assets of the kind referred to in clauses
(3) or (5) of the next paragraph of this Section 4.10. 
 (b)    Within 365 days after the receipt of any Net
Proceeds from an Asset Sale, the Company (or the applicable Restricted Subsidiary, as the case may be) may apply such Net Proceeds at its options: 

(1)    to repay Indebtedness that is secured by a Lien; 

(2)    to repay Obligations under other Indebtedness (other than Disqualified Stock or subordinated
Indebtedness), other than Indebtedness owed to the Company or an Affiliate of the Company; provided that the Company shall equally and ratably reduce the Obligations under the Notes as provided under Section 3.07 hereof, through open
market purchases (to the extent such purchases are at or above 100% of the principal amount thereof) or by making an offer (in accordance with the procedures set forth below for an Asset Sale Offer) to all Holders to purchase their Notes at 100% of
the principal amount thereof, plus the accrued but unpaid interest on the amount of the Notes that would otherwise be prepaid; 

(3)    to acquire all or substantially all of the assets of, or any Capital Stock of, another Permitted
Business, if, after giving effect to any such acquisition of Capital Stock, the Permitted Business is or becomes a Restricted Subsidiary of the Company; 

  
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 (4)    to make a capital expenditure; 

(5)    to acquire other assets that are not classified as current assets under GAAP and that are used or
useful in a Permitted Business; or 
 (6)    any combination of the foregoing; 

provided that, in the case of clauses (1), (3), (4) and (5) above, a binding commitment shall be treated as a permitted application of the Net
Proceeds from the date of such commitment so long as the Company or such Restricted Subsidiary enters into such commitment with the good faith expectation that such Net Proceeds will be applied to satisfy such commitment within 180 days of the date
thereof; provided that if any commitment is later canceled or terminated for any reason before such Net Proceeds are applied, then such Net Proceeds shall constitute Excess Proceeds from the later of (i) the date of such cancelation or
termination or (ii) the 365th day after the receipt of such Net Proceeds from the applicable Asset Sale. 
 Pending the final
application of any Net Proceeds, the Company (or the applicable Restricted Subsidiary) may temporarily reduce revolving credit borrowings or otherwise invest the Net Proceeds in any manner that is not prohibited by this Supplemental Indenture. 

(c)    Any Net Proceeds from Asset Sales that are not applied or invested as provided in Section 4.10(b) hereof will
constitute “Excess Proceeds.” When the aggregate amount of Excess Proceeds exceeds $50.0 million, within five Business Days thereof, the Company will make an Asset Sale Offer to all Holders of Notes and all holders of other
Indebtedness that (i) is pari passu with the Notes, and (ii) contemporaneously require the purchase, prepayment or redemption of such Indebtedness with the proceeds of sales of assets in accordance with Section 3.09 hereof to
purchase, prepay or redeem the maximum principal amount of Notes and such other pari passu Indebtedness (plus all accrued interest on the Indebtedness and the amount of all fees and expenses, including premiums, incurred in connection
therewith) that may be purchased, prepaid or redeemed out of the Excess Proceeds. The Excess Proceeds shall be allocated between the Notes and the other pari passu Indebtedness referred to above on a pro rata basis based on the
aggregate amount of such Indebtedness then outstanding. The offer price with respect to the Notes in any Asset Sale Offer will be equal to 100% of the principal amount, plus accrued and unpaid interest to the date of purchase, prepayment or
redemption, subject to the rights of Holders of Notes on the relevant record date to receive interest due on the relevant interest payment date, and will be payable in cash. If any Excess Proceeds remain after consummation of an Asset Sale Offer and
the contemporaneous offer with respect to any other pari passu Indebtedness contemplated above, the Company may use those Excess Proceeds for any purpose not otherwise prohibited by this Supplemental Indenture. If the aggregate principal
amount of Notes tendered in such Asset Sale Offer exceeds the amount of Excess Proceeds allocable to the Notes, the Trustee will select the Notes to be purchased on a pro rata basis (or, in the case of Notes issued in global form, in
accordance with the applicable procedures of DTC, based on the amounts tendered or required to be prepaid or redeemed) (with such adjustments as may be deemed appropriate by the Company so that only Notes in denominations of $2,000, or an integral
multiple of $1,000 in excess thereof, will be purchased). The remainder of the Excess Proceeds allocable to the other pari passu Indebtedness will be repurchased in a similar manner. Upon completion of each Asset Sale Offer, the amount of
Excess Proceeds will be reset at zero. 

  
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 (d)    The Company will comply with the requirements of Rule 14e-1 under the Exchange Act and any other securities laws and regulations thereunder to the extent those laws and regulations are applicable in connection with each repurchase of Notes pursuant to an Asset Sale
Offer. To the extent that the provisions of any securities laws or regulations conflict with the provisions of Section 3.09 hereof or this Section 4.10, the Company will comply with the applicable securities laws and regulations and will
not be deemed to have breached its obligations under Section 3.09 hereof or this Section 4.10 by virtue of such compliance. 

Section 4.11.    Transactions with Affiliates. 

(a)    The Company will not, and will not permit any of its Restricted Subsidiaries to, make any payment to or sell, lease,
transfer or otherwise dispose of any of its properties or assets to, or purchase any property or assets from, or enter into or make or amend any transaction, contract, agreement, understanding, loan, advance or guarantee with, or for the benefit of,
any Affiliate of the Company (each, an “Affiliate Transaction”) involving aggregate payments or consideration in excess of $10.0 million, unless: 

(1)    the Affiliate Transaction is on terms, taken as a whole, that are no less favorable to the Company
or the relevant Restricted Subsidiary than those that would have been obtained in a comparable transaction by the Company or such Restricted Subsidiary with an unrelated Person; and 

(2)    the Company delivers to the Trustee: 

(A)    with respect to any Affiliate Transaction or series of related Affiliate Transactions involving
aggregate consideration in excess of $15.0 million, a resolution of the Board of Directors of the Company set forth in an Officer’s Certificate certifying that such Affiliate Transaction complies with this Section 4.11 and that such
Affiliate Transaction has been approved by a majority of the disinterested members of the Board of Directors of the Company; and 

(B)    with respect to any Affiliate Transaction or series of related Affiliate Transactions involving
aggregate consideration in excess of $50.0 million, an opinion as to the fairness to the Company or such Restricted Subsidiary of such Affiliate Transaction from a financial point of view issued by an accounting, appraisal or investment banking
firm of national standing designated by the Company. 
 (b)    The following items will be deemed not to be Affiliate
Transactions and, therefore, will not be subject to the provisions of Section 4.11(a) hereof: 

(1)    any employment agreement, employee benefit plan, officer or director indemnification agreement or
any similar arrangement entered into by the Company or any of its Restricted Subsidiaries in the ordinary course of business and payments pursuant thereto and the issuance of Equity Interests of the Company (other than Disqualified Stock) to
directors and employees pursuant to stock option or stock ownership plans; 

  
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 (2)    transactions between or among the Company and/or
its Restricted Subsidiaries; 
 (3)    transactions with a Person (other than an Unrestricted Subsidiary
of the Company) that is an Affiliate of the Company solely because the Company owns, directly or through a Restricted Subsidiary, an Equity Interest in, or controls, such Person; 

(4)    payment or advancement of reasonable and customary fees and reimbursements of expenses (pursuant to
indemnity arrangements or otherwise) of officers, directors, employees or consultants of the Company or any of its Restricted Subsidiaries; 

(5)    loans or advances to employees in the ordinary course of business not to exceed $10.0 million
in the aggregate at any one time outstanding; 
 (6)    any issuance of Equity Interests (other than
Disqualified Stock) of the Company to Affiliates of the Company and the granting of registration and other customary rights in connection therewith; 

(7)    Restricted Payments that do not violate Section 4.07 hereof and Permitted Investments; 

(8)    any agreement as in effect as of the Issue Date, as any such agreement may be amended, modified,
supplemented, extended or renewed from time to time, so long as any such amendment, modification, supplement, extension or renewal is not more disadvantageous to the Holders of Notes in any material respect than the terms of the agreements in effect
on the Issue Date; 
 (9)    any agreement between any Person and an Affiliate of such Person existing at
the time such Person is acquired by, merged into or amalgamated, arranged or consolidated with the Company or any of its Restricted Subsidiaries; provided that such agreement was not entered into in contemplation of such acquisition, merger,
amalgamation, arrangement or consolidation and any amendment thereto (so long as any such amendment is not more disadvantageous to the Holders of Notes in any material respect than the applicable agreement as in effect on the date of such
acquisition, merger, amalgamation, arrangement or consolidation); 
 (10)    transactions between the
Company or any of its Restricted Subsidiaries and any Person that is an Affiliate solely because one or more of its directors is also a director of the Company or any of its Restricted Subsidiaries; provided that such director abstains from
voting as a director of the Company or such Restricted Subsidiary, as the case may be, on any matter involving such other Person; 

(11)    any transaction or series of related transactions for which the Company or any of its Restricted
Subsidiaries delivers to the Trustee an opinion as to the fairness to the Company or the applicable Restricted Subsidiary of such transaction or series of related transactions from a financial point of view issued by an accounting, appraisal or
investment banking firm of national recognized standing. 

  
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 (12)    any contribution to the common equity capital of
the Company; 
 (13)    the pledge of Equity Interests of any Unrestricted Subsidiary; 

(14)    the entering into of any tax sharing, allocation or similar agreement and any payments by the
Company (or any direct or indirect parent of the Company) or any of its Restricted Subsidiaries pursuant to any tax sharing, allocation or similar agreement; 

(15)    any transaction or series of related transactions between or among the Company and any of its
subsidiaries implemented in connection with any corporate restructuring; 
 (16)    payments to or from,
and transactions with, any joint venture in the ordinary course of business; provided that such arrangements are on terms no less favorable to the Company and its Subsidiaries, on the one hand, than to the relevant joint venture partner and its
Affiliates, on the other hand, taking into account all related agreements and transactions entered into by the Company and its Subsidiaries, on the one hand, and the relevant joint venture partner and its Affiliates, on the other hand (as determined
in good faith by the Board of Directors of the Company); and 
 (17)    the existence of, or the
performance by the Company or any of its Restricted Subsidiaries of its obligations under the terms of any stockholders agreement, partnership agreement or limited liability company members agreement (including any registration rights agreement or
purchase agreement related thereto) to which it is a party as of the date of this Supplemental Indenture and any similar agreements which it may enter into thereafter, in each case subject to compliance with the other provisions of this Supplemental
Indenture; provided, however, that the existence, or the performance by the Company or any of its Restricted Subsidiaries of obligations under, any future amendment to any such existing agreement or under any similar agreement entered into after the
date of this Supplemental Indenture shall only be permitted by this clause (17) to the extent that the terms (taken as a whole) of any such amendment or new agreement are not otherwise materially disadvantageous to the Holders of the Notes, as
determined in good faith by the Board of Directors or senior management of the Company or such Restricted Subsidiary. 

Section 4.12.    Liens. The Company will not, and will not permit any of its Restricted Subsidiaries to,
directly or indirectly, create, incur, assume or suffer to exist any Lien of any kind securing Indebtedness, Attributable Debt or trade payables on any asset now owned or hereafter acquired, except Permitted Liens, unless contemporaneously
therewith: 
 (1)    in the case of any Lien securing an obligation that ranks pari passu with the
Notes or a guarantee of the Notes, effective provision is made to secure the Notes or such Note Guarantee, as the case may be, at least equally and ratably with or prior to such obligation with a Lien on the same assets of the Company or such
Restricted Subsidiary, as the case may be; and 
 (2)    in the case of any Lien securing Indebtedness
subordinated in right of payment to the Notes or a Note Guarantee, effective provision is made to secure the 

  
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Notes or such Note Guarantee, as the case may be, with a Lien on the same assets of the Company or such Restricted Subsidiary, as the case may be, that is prior to the Lien securing such
subordinated Indebtedness. 
 Section 4.13.    Business Activities. The Company will not, and will not
permit any of its Restricted Subsidiaries to, engage in any business other than Permitted Businesses, except to such extent as would not be material to the Company and its Restricted Subsidiaries taken as a whole. 

Section 4.14.    Corporate Existence. Subject to Article 5 hereof, the Company shall do or cause to be done
all things necessary to preserve and keep in full force and effect: 
 (1)    its corporate existence,
and the corporate, partnership or other existence of each of its Subsidiaries, in accordance with the respective organizational documents (as the same may be amended from time to time) of the Company or any such Subsidiary; and 

(2)    the rights (charter and statutory), licenses and franchises of the Company and its Subsidiaries;
provided, however, that the Company shall not be required to preserve any such right, license or franchise, or the corporate, partnership or other existence of any of its Subsidiaries, if the Board of Directors of the Company shall
determine that the preservation thereof is no longer desirable in the conduct of the business of the Company and its Subsidiaries, taken as a whole, and that the loss thereof is not adverse in any material respect to the Holders of the Notes. 

Section 4.15.    Offer to Repurchase Upon Change of Control. 

(a)    Upon the occurrence of a Change of Control, the Company will make an offer (a “Change of Control Offer”)
to each Holder to repurchase all or any part (equal to $2,000 or an integral multiple of $1,000 in excess thereof) of that Holder’s Notes at a purchase price in cash equal to 101% of the aggregate principal amount of Notes repurchased, plus
accrued and unpaid interest on the Notes repurchased to but excluding the date of purchase, subject to the rights of Holders of Notes so called for repurchase on or after a record date for the payment of interest to receive interest due on the
relevant interest payment date (the “Change of Control Payment”). Within 30 days following any Change of Control, the Company will mail a notice to each Holder describing the transaction or transactions that constitute the Change of
Control and stating: 
 (1)    that the Change of Control Offer is being made pursuant to this
Section 4.15 and that all Notes tendered will be accepted for payment; 
 (2)    the purchase price
and the purchase date, which shall be no earlier than 30 days and no later than 60 days from the date such notice is mailed (the “Change of Control Payment Date”); 

(3)    that any Note not tendered will continue to accrue interest; 

  
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 (4)    that, unless the Company defaults in the payment
of the Change of Control Payment, all Notes accepted for payment pursuant to the Change of Control Offer will cease to accrue interest after the Change of Control Payment Date; 

(5)    that Holders electing to have any Notes purchased pursuant to a Change of Control Offer will be
required to surrender the Notes, with the form entitled “Option of Holder to Elect Purchase” attached to the Notes completed, or transfer by book-entry transfer, to the Paying Agent at the address specified in the notice prior to the close
of business on the third Business Day preceding the Change of Control Payment Date; 
 (6)    that
Holders will be entitled to withdraw their election if the Paying Agent receives, not later than the close of business on the second Business Day preceding the Change of Control Payment Date, a telegram, telex, facsimile transmission or letter
setting forth the name of the Holder, the principal amount of Notes delivered for purchase, and a statement that such Holder is withdrawing his election to have the Notes purchased; and 

(7)    that Holders whose Notes are being purchased only in part will be issued new Notes equal in
principal amount to the unpurchased portion of the Notes surrendered, which unpurchased portion must be equal to $2,000 in principal amount or an integral multiple of $1,000 in excess thereof. In connection with the tender of any Notes with respect
to a Change of Control, the tendering Holder of Notes shall provide good title to the Notes, free and clear of all liens and encumbrances, and shall represent and warrant that such Holder of Notes is presenting good title, free and clear of all
Liens and encumbrances, and such other representations and warranties as are customary. 
 The Company will comply with the requirements of
Rule 14e-1 under the Exchange Act and any other securities laws and regulations thereunder to the extent those laws and regulations are applicable in connection with the repurchase of the Notes as a result of
a Change of Control. To the extent that the provisions of any securities laws or regulations conflict with the provisions of this Section 4.15, the Company will comply with the applicable securities laws and regulations and will not be deemed
to have breached its obligations under this Section 4.15 by virtue of such compliance. 
 (b)    On the Change of
Control Payment Date, the Company will, to the extent lawful: 
 (1)    accept for payment all Notes or
portions of Notes properly tendered pursuant to the Change of Control Offer; 
 (2)    deposit with the
Paying Agent an amount equal to the Change of Control Payment in respect of all Notes or portions of Notes properly tendered; and 

(3)    deliver or cause to be delivered to the Trustee the Notes properly accepted together with an
Officer’s Certificate stating the aggregate principal amount of Notes being purchased by the Company. 

  
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 The Paying Agent will promptly mail or wire transfer (but in any case not later than five
days after the Change of Control Payment Date) to each Holder of Notes properly tendered the Change of Control Payment for such Notes, and the Trustee will promptly authenticate and mail (or cause to be transferred by book entry) to each tendering
Holder a new Note equal in principal amount to the unpurchased portion (if any) of the Note surrendered by such Holder. The Company will publicly announce the results of the Change of Control Offer on or as soon as practicable after the Change of
Control Payment Date. 
 (c)    Notwithstanding anything to the contrary in this Section 4.15, the Company will not
be required to make a Change of Control Offer upon a Change of Control if (1) a third party makes the Change of Control Offer in the manner, at the times and otherwise in compliance with the requirements set forth in this Section 4.15 and
purchases all Notes properly tendered and not withdrawn under the Change of Control Offer, or (2) notice of redemption has been given pursuant to Section 3.07 hereof, unless and until there is a default in payment of the applicable
redemption price. 
 (d)    Notwithstanding anything to the contrary contained herein, a Change of Control Offer may be
made in advance of a Change of Control, and conditioned upon the consummation of such Change of Control, if a definitive agreement is in place for the Change of Control at the time the Change of Control Offer is made. 

(e)    If Holders of not less than 90% in aggregate principal amount of the then outstanding Notes validly tender and do
not withdraw such Notes in a Change of Control Offer and the Company, or any other Person making a Change of Control Offer in lieu of the Company as pursuant to Section 4.15(e), purchases all of the Notes validly tendered and not withdrawn by
such Holders, the Company will have the right, upon not less than 15 nor more than 30 days’ prior notice, given not more than 15 days following such purchase pursuant to the Change of Control Offer pursuant to Section 4.15, to redeem all
Notes that remain outstanding following such purchase at a redemption price in cash equal to the applicable Change of Control Payment plus, to the extent not included in the Change of Control Payment, accrued and unpaid interest to but excluding the
date of redemption (subject to the right of holders of record on the relevant record date to receive interest due on the relevant interest payment date). 

Section 4.16.    Limitation on Sale and Leaseback Transactions. The Company will not, and will not permit any
of its Restricted Subsidiaries to, enter into any sale and leaseback transaction; provided that the Company or any Restricted Subsidiary may enter into a sale and leaseback transaction if: 

(1)    the Company or that Restricted Subsidiary, as applicable, could have (a) incurred Indebtedness
in an amount equal to the Attributable Debt relating to such sale and leaseback transaction under the Fixed Charge Coverage Ratio test in Section 4.09(a) hereof and (b) incurred a Lien to secure such Indebtedness pursuant to
Section 4.12 hereof; and 
 (2)    the transfer of assets in that sale and leaseback transaction is
permitted by, and the Company applies the proceeds of such transaction in compliance with, Section 4.10 hereof. 

  
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 Section 4.17.    Payments for Consent. The Company will not,
and will not permit any of its Restricted Subsidiaries to, directly or indirectly, pay or cause to be paid any consideration to or for the benefit of any Holder of Notes for or as an inducement to any consent, waiver or amendment of any of the terms
or provisions of this Supplemental Indenture or the Notes unless consideration determined and paid on the same basis is offered to be paid and is paid to all Holders of the Notes that consent, waive or agree to amend in the time frame set forth in
the solicitation documents relating to such consent, waiver or agreement. 
 Section 4.18.    Additional Note
Guarantees. The Company will cause each of its Restricted Subsidiaries that is not a Guarantor and that becomes a borrower or guarantor under the Senior Credit Facility or that Guarantees, on the Issue Date or any time thereafter, any other
Indebtedness of the Company, which other Indebtedness exceeds $10.0 million in aggregate principal amount, to become a Guarantor by executing a supplemental indenture and delivering an Opinion of Counsel satisfactory to the Trustee within 20
Business Days thereafter to the effect that such supplemental indenture has been duly authorized, executed and delivered by that Restricted Subsidiary and constitutes a valid and binding agreement of that Restricted Subsidiary, enforceable in
accordance with its terms (subject to customary exceptions). The form of such supplemental indenture is attached as Exhibit C hereto. 

Section 4.19.    Designation of Restricted and Unrestricted Subsidiaries. The Board of Directors of the
Company may designate any Restricted Subsidiary to be an Unrestricted Subsidiary if that designation would not cause a Default. If a Restricted Subsidiary is designated as an Unrestricted Subsidiary, the aggregate Fair Market Value of all
outstanding Investments owned by the Company and its Restricted Subsidiaries in the Subsidiary designated as an Unrestricted Subsidiary will be deemed to be an Investment made as of the time of the designation and will reduce the amount available
either for Restricted Payments under Section 4.07 hereof or under one or more clauses of the definition of Permitted Investments, as determined by the Company in its sole discretion. That designation will only be permitted if the Investment
would be permitted at that time and if the Restricted Subsidiary otherwise meets the definition of an Unrestricted Subsidiary. The Board of Directors of the Company may redesignate any Unrestricted Subsidiary to be a Restricted Subsidiary if that
redesignation would not cause a Default. 
 Any designation of a Subsidiary of the Company as an Unrestricted Subsidiary will be evidenced
to the Trustee by filing with the Trustee a certified copy of a resolution of the Board of Directors of the Company giving effect to such designation and an Officer’s Certificate certifying that such designation complied with the preceding
conditions and was permitted by Section 4.07 hereof or was a Permitted Investment under one or more of the clauses of the definition of Permitted Investments. If, at any time, any Unrestricted Subsidiary would fail to meet the preceding
requirements as an Unrestricted Subsidiary, it will thereafter cease to be an Unrestricted Subsidiary for purposes of this Supplemental Indenture and any Indebtedness of such Subsidiary will be deemed to be incurred by a Restricted Subsidiary of the
Company as of such date and, if such Indebtedness is not permitted to be incurred as of such date under Section 4.09 hereof, the Company will be in default of such covenant. The Board of Directors of the Company may at any time designate any
Unrestricted Subsidiary to be a Restricted Subsidiary of the Company; provided that such designation will be deemed to be an incurrence of Indebtedness by a Restricted Subsidiary of the Company of any outstanding Indebtedness of such
Unrestricted 

  
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Subsidiary, and such designation will only be permitted if (1) such Indebtedness is permitted under Section 4.09 hereof, calculated on a pro forma basis as if such designation had
occurred at the beginning of the applicable reference period; and (2) no Default or Event of Default would be in existence following such designation. 

Section 4.20.    Changes in Covenants When Notes Rated Investment Grade. 

(a)    If on any date following the date of this Supplemental Indenture: 

(1)    the Notes are rated Baa3 or better by Moody’s and BBB-
or better by S&P (or, if either such entity ceases to rate the Notes for reasons outside of the control of the Company, the equivalent investment grade credit rating from any other “nationally recognized statistical rating
organization” as such term is defined in Section (3)(a)(62) of the Exchange Act, selected by the Company as a replacement agency); and 

(2)    no Default or Event of Default shall have occurred and be continuing, 

then, beginning on that day and subject to the provisions of Section 4.20(c), the covenants contained in Sections 4.07, 4.08, 4.09, 4.10, 4.11,
4.16(1)(a) and (2), 4.18 and 5.01(4) of this Supplemental Indenture will be suspended. 
 (b)    During any period that
the foregoing covenants have been suspended, the Company’s Board of Directors may not designate any of its Subsidiaries as Unrestricted Subsidiaries pursuant to Section 4.19 hereof or the definition of “Unrestricted Subsidiary.”

 (c)    Notwithstanding the foregoing, if the rating assigned by either such rating agency should subsequently decline
to below Baa3 or BBB-, respectively, the covenants specified in Section 4.20(a) will be reinstituted as of and from the date of such rating decline. Calculations under the reinstated Section 4.07
hereof will be made as if Section 4.07 hereof had been in effect since the date of this Supplemental Indenture except that no Default or Event of Default will be deemed to have occurred solely by reason of a Restricted Payment made while that
covenant was suspended or for any other failure to comply with any suspended covenants during a period when the covenants were suspended. Notwithstanding the foregoing, the continued existence after any reinstitution of the foregoing covenants of
obligations arising from transactions that occurred during the period such covenants were suspended shall not constitute a breach of any covenant set forth in this Supplemental Indenture or cause an Event of Default hereunder. 

(d)    The Trustee shall have no responsibility to monitor any change in the rating of the Notes. 

ARTICLE 5 
 SUCCESSORS 

Section 5.01.    Merger, Consolidation or Sale of Assets. The Company shall not, directly or
indirectly: (1) consolidate or merge with or into another Person (whether or not the Company is the surviving corporation), or (2) sell, assign, transfer, convey or otherwise dispose of all or substantially all of the properties or assets
of the Company and its Restricted Subsidiaries taken as a whole, in one or more related transactions, to another Person, unless: 

(1)    either: 

(A)    the Company is the surviving corporation; or 

  
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 (B)    the Person formed by or surviving any such
consolidation or merger (if other than the Company) or to which such sale, assignment, transfer, conveyance or other disposition has been made is an entity organized or existing under the laws of the United States, any state of the United States or
the District of Columbia, Canada, or any province of Canada; and, if such entity is not a corporation, a co-obligor of the Notes is a corporation organized or existing under any such laws; 

(2)    the Person formed by or surviving any such consolidation or merger (if other than the Company) or
the Person to which such sale, assignment, transfer, conveyance or other disposition has been made assumes all the obligations of the Company under the Notes and this Supplemental Indenture pursuant to agreements reasonably satisfactory to the
Trustee; 
 (3)    immediately after such transaction, no Default or Event of Default exists; 

(4)    the Company or the Person formed by or surviving any such consolidation or merger (if other than the
Company), or to which such sale, assignment, transfer, conveyance or other disposition has been made would, on the date of such transaction after giving pro forma effect thereto and any related financing transactions as if the same had occurred at
the beginning of the applicable four-quarter period (i) be permitted to incur at least $1.00 of additional Indebtedness pursuant to the Fixed Charge Coverage Ratio test set forth in Section 4.09(a) hereof or (ii) have had a Fixed
Charge Coverage Ratio greater than the actual Fixed Charge Coverage Ratio for the Company for such four-quarter period; and 

(5)    the Company has delivered to the Trustee an Officer’s Certificate and an Opinion of Counsel,
each stating that any such event complies with the foregoing. 
 In addition, the Company will not, directly or indirectly, lease all or
substantially all of the properties and assets of it and its Restricted Subsidiaries taken as a whole, in one or more related transactions, to any other Person. 

This Section 5.01 will not apply to any sale, assignment, transfer, conveyance, lease or other disposition of assets between or among the
Company and any one or more of its Restricted Subsidiaries or between or among any one or more of the Company’s Restricted Subsidiaries. Clauses (3) and (4) of this Section 5.01 will not apply to (a) any merger or consolidation
of the Company with or into one of its Restricted Subsidiaries for any purpose or (b) with or into an Affiliate solely for the purpose of reincorporating the Company in another jurisdiction or creating a holding company for the Company and its
Restricted Subsidiaries. 
 Section 5.02.    Successor Corporation Substituted. Upon any consolidation or
merger, or any sale, assignment, transfer, lease, conveyance or other disposition of all or substantially all of the properties or assets of the Company in a transaction that is subject to, and that complies


  
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with the provisions of, Section 5.01 hereof, the successor Person formed by such consolidation or into or with which the Company is merged or to which such sale, assignment, transfer, lease,
conveyance or other disposition is made shall succeed to, and be substituted for (so that from and after the date of such consolidation, merger, sale, assignment, transfer, lease, conveyance or other disposition, the provisions of this Supplemental
Indenture referring to the “Company” shall refer instead to the successor Person and not to the Company), and may exercise every right and power of the Company under this Supplemental Indenture with the same effect as if such successor
Person had been named as the Company herein; provided, however, that the predecessor Company shall not be relieved from the obligation to pay the principal of, premium on, if any, interest on, the Notes except in the case of a sale of
all of the Company’s assets in a transaction that is subject to, and that complies with the provisions of, Section 5.01 hereof. 

ARTICLE 6 
 DEFAULTS AND
REMEDIES 
 Section 6.01.    Events of Default. Each of the following is an “Event of
Default”: 
 (1)    default for 30 consecutive days in the payment when due of interest on the
Notes; 
 (2)    default in the payment when due (at maturity, upon redemption or otherwise) of the
principal of, or premium, if any, on the Notes; 
 (3)    failure by the Company or any of its Restricted
Subsidiaries to comply with Section 5.01 hereof; 
 (4)    failure by the Company or any of its
Restricted Subsidiaries for 30 days after notice to the Company by the Trustee or the Holders of at least 25% in aggregate principal amount of the Notes then outstanding voting as a single class to comply with the provisions of Sections 4.07, 4.09,
4.10 or 4.15 hereof; 
 (5)    failure by the Company or any of its Restricted Subsidiaries for 60 days
after notice to the Company by the Trustee or the Holders of at least 25% in aggregate principal amount of the Notes then outstanding voting as a single class to comply with any of the other agreements in this Supplemental Indenture; 

(6)    default under any mortgage, indenture or instrument under which there may be issued or by which
there may be secured or evidenced any Indebtedness for money borrowed by the Company or any of its Restricted Subsidiaries (or the payment of which is guaranteed by the Company or any of its Restricted Subsidiaries), whether such Indebtedness or
Guarantee now exists, or is created after the date of this Supplemental Indenture, if that default: 

(A)    is caused by a failure to pay principal of, premium on, if any, or interest, if any, on, such
Indebtedness prior to the expiration of the grace period provided in such Indebtedness on the date of such default (a “Payment Default”); or 

  
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 (B)    results in the acceleration of such Indebtedness
prior to its express maturity, 
 and, in each case, the principal amount of any such Indebtedness, together with the principal amount of any
other such Indebtedness under which there has been a Payment Default or the maturity of which has been so accelerated, aggregates $50.0 million or more; 

(7)    failure by the Company or any Significant Subsidiary or any group of its Restricted Subsidiaries
that, taken together (as of the date of the latest audited consolidated financial statements of the Company and its Restricted Subsidiaries), would constitute a Significant Subsidiary, to pay final
non-appealable judgments entered by a court or courts of competent jurisdiction aggregating in excess of $50.0 million (net of any amounts covered by insurance policies issued by a reputable and
creditworthy insurance company that is not contesting liability for such amounts) , which final non-appealable judgments are not paid, discharged or stayed, for a period of 60 days after such judgment becomes
final, and in the event such judgment is covered in full by insurance, an enforcement proceeding has been commenced by any creditor upon such judgment or decree which is not promptly stayed; 

(8)    except as permitted by this Supplemental Indenture, any Note Guarantee of a Significant Subsidiary
or any group of Guarantors that, taken together (as of the date of the latest audited consolidated financial statements of the Company and its Restricted Subsidiaries), would constitute a Significant Subsidiary, is held in any final, non-appealable judicial proceeding to be unenforceable or invalid or ceases for any reason to be in full force and effect, or any Guarantor that is a Significant Subsidiary or any group of Guarantors that, taken
together (as of the date of the latest audited consolidated financial statements of the Company and its Restricted Subsidiaries), would constitute a Significant Subsidiary, or any Person acting on behalf of any such Guarantor, denies or disaffirms
its obligations under its Note Guarantee; 
 (9)    the Company or any of its Restricted Subsidiaries
that is a Significant Subsidiary or any group of Restricted Subsidiaries of the Company that, taken together, would constitute a Significant Subsidiary pursuant to or within the meaning of Bankruptcy Law: 

(A)    commences a voluntary case, 

(B)    consents to the entry of an order for relief against it in an involuntary case, 

(C)    consents to the appointment of a custodian of it or for all or substantially all of its property,

 (D)    makes a general assignment for the benefit of its creditors, or 

(E)    generally is unable to pay its debts as they become due; and 

  
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 (10)    a court of competent jurisdiction enters a final
non-appealable order or decree under any Bankruptcy Law that: 

(A)    is for relief against the Company or any of its Restricted Subsidiaries that is a Significant
Subsidiary or any group of Restricted Subsidiaries of the Company that, taken together, would constitute a Significant Subsidiary in an involuntary case; 

(B)    appoints a custodian of the Company or any of its Restricted Subsidiaries that is a Significant
Subsidiary or any group of Restricted Subsidiaries of the Company that, taken together, would constitute a Significant Subsidiary or for all or substantially all of the property of the Company or any of its Restricted Subsidiaries that is a
Significant Subsidiary or any group of Restricted Subsidiaries of the Company that, taken together, would constitute a Significant Subsidiary; or 

(C)    orders the liquidation of the Company or any of its Restricted Subsidiaries that is a Significant
Subsidiary or any group of Restricted Subsidiaries of the Company that, taken together, would constitute a Significant Subsidiary; 
 and the final non-appealable order or decree remains unstayed and in effect for 90 consecutive days. 

Section 6.02.    Acceleration. In the case of an Event of Default specified in clause (9) or (10) of
Section 6.01 hereof, with respect to the Company, any Restricted Subsidiary of the Company that is a Significant Subsidiary or any group of Restricted Subsidiaries of the Company that, taken together, would constitute a Significant Subsidiary,
all outstanding Notes will become due and payable immediately without further action or notice. If any other Event of Default occurs and is continuing, the Trustee or the Holders of at least 25% in aggregate principal amount of the then outstanding
Notes may declare all the Notes to be due and payable immediately. 
 Upon any such declaration, the Notes shall become due and payable
immediately. 
 The Holders of a majority in aggregate principal amount of the then outstanding Notes by written notice to the Trustee may,
on behalf of all of the Holders of all the Notes, rescind an acceleration or waive any existing Default or Event of Default and its consequences hereunder, if the rescission would not conflict with any judgment or decree, except a continuing Default
or Event of Default in the payment of principal of, premium on, if any, or interest on, the Notes. 

Section 6.03.    Other Remedies. If an Event of Default occurs and is continuing, the Trustee may pursue any
available remedy to collect the payment of principal of, premium on, if any, interest on the Notes or to enforce the performance of any provision of the Notes or this Supplemental Indenture. 

  
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 The Trustee may maintain a proceeding even if it does not possess any of the Notes or does
not produce any of them in the proceeding. A delay or omission by the Trustee or any Holder of a Note in exercising any right or remedy accruing upon an Event of Default shall not impair the right or remedy or constitute a waiver of or acquiescence
in the Event of Default. All remedies are cumulative to the extent permitted by law. 
 Section 6.04.    Waiver
of Past Defaults. The Holders of a majority in aggregate principal amount of the then outstanding Notes by written notice to the Trustee may, on behalf of the Holders of all of the Notes waive any existing Default or Event of Default and its
consequences hereunder, except a continuing Default or Event of Default in the payment of principal of, premium on, if any, interest on, the Notes (including in connection with an offer to purchase); provided, however, that the Holders
of a majority in aggregate principal amount of the then outstanding Notes may rescind an acceleration and its consequences, including any related payment default that resulted from such acceleration. Upon any such waiver, such Default shall cease to
exist, and any Event of Default arising therefrom shall be deemed to have been cured for every purpose of this Supplemental Indenture; but no such waiver shall extend to any subsequent or other Default or impair any right consequent thereon. 

Section 6.05.    Control by Majority. Holders of a majority in aggregate principal amount of the then
outstanding Notes may direct the time, method and place of conducting any proceeding for exercising any remedy available to the Trustee or exercising any trust or power conferred on it. However, the Trustee may refuse to follow any direction that
conflicts with law or this Supplemental Indenture that the Trustee determines may be unduly prejudicial to the rights of other Holders of Notes or that may involve the Trustee in personal liability. 

Section 6.06.    Limitation on Suits. No Holder of a Note may pursue any remedy with respect to this
Supplemental Indenture or the Notes unless: 
 (1)    such Holder has previously given the Trustee
written notice that an Event of Default is continuing; 
 (2)    Holders of at least 25% in aggregate
principal amount of the then outstanding Notes make a written request to the Trustee to pursue the remedy; 

(3)    such Holder or Holders offer and, if requested, provide to the Trustee security or indemnity
reasonably satisfactory to the Trustee against any loss, liability or expense; 
 (4)    the Trustee does
not comply with such request within 60 days after receipt of the request and the offer of security or indemnity; and 

(5)    during such 60-day period, Holders of a majority in
aggregate principal amount of the then outstanding Notes do not give the Trustee a direction inconsistent with such request. 
 A Holder of
a Note may not use this Supplemental Indenture to prejudice the rights of another Holder of a Note or to obtain a preference or priority over another Holder of a Note. 

  
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 Section 6.07.    Rights of Holders of Notes to Receive
Payment. Notwithstanding any other provision of this Supplemental Indenture, the right of any Holder of a Note to receive payment of principal of, premium on, if any, interest on the Note, on or after the respective due dates expressed in the
Note, or to bring suit for the enforcement of any such payment on or after such respective dates, shall not be impaired or affected without the consent of such Holder. 

Section 6.08.    Collection Suit by Trustee. If an Event of Default specified in Section 6.01(1) or
(2) hereof occurs and is continuing, the Trustee is authorized to recover judgment in its own name and as trustee of an express trust against the Company for the whole amount of principal of, premium on, if any, interest remaining unpaid on the
Notes and interest on overdue principal and, to the extent lawful, interest and such further amount as shall be sufficient to cover the costs and expenses of collection, including the reasonable compensation, expenses, disbursements and advances of
the Trustee, its agents and counsel. 
 Section 6.09.    Trustee May File Proofs of Claim. The Trustee is
authorized to file such proofs of claim and other papers or documents as may be necessary or advisable in order to have the claims of the Trustee (including any claim for the reasonable compensation, expenses, disbursements and advances of the
Trustee, its agents and counsel) and the Holders of the Notes allowed in any judicial proceedings relative to the Company (or any other obligor upon the Notes), its creditors or its property and shall be entitled and empowered to collect, receive
and distribute any money or other property payable or deliverable on any such claims and any custodian in any such judicial proceeding is hereby authorized by each Holder to make such payments to the Trustee, and in the event that the Trustee shall
consent to the making of such payments directly to the Holders, to pay to the Trustee any amount due to it for the reasonable compensation, expenses, disbursements and advances of the Trustee, its agents and counsel, and any other amounts due the
Trustee under Section 7.07 hereof. To the extent that the payment of any such compensation, expenses, disbursements and advances of the Trustee, its agents and counsel, and any other amounts due the Trustee under Section 7.07 hereof out of
the estate in any such proceeding, shall be denied for any reason, payment of the same shall be secured by a Lien on, and shall be paid out of, any and all distributions, dividends, money, securities and other properties that the Holders may be
entitled to receive in such proceeding whether in liquidation or under any plan of reorganization or arrangement or otherwise. Nothing herein contained shall be deemed to authorize the Trustee to authorize or consent to or accept or adopt on behalf
of any Holder any plan of reorganization, arrangement, adjustment or composition affecting the Notes or the rights of any Holder, or to authorize the Trustee to vote in respect of the claim of any Holder in any such proceeding. 

Section 6.10.    Priorities. If the Trustee collects any money pursuant to this Article 6, it shall pay out
the money in the following order: 
 First: to the Trustee, its agents and attorneys for amounts due under Section 7.07 hereof,
including payment of all compensation, expenses and liabilities incurred, and all advances made, by the Trustee and the costs and expenses of collection; 

Second: to Holders of Notes for amounts due and unpaid on the Notes for principal, premium, if any, interest ratably, without
preference or priority of any kind, according to the amounts due and payable on the Notes for principal, premium, if any, interest respectively; and 

Third: to the Company or to such party as a court of competent jurisdiction shall direct. 

  
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 The Trustee may fix a record date and payment date for any payment to Holders of Notes
pursuant to this Section 6.10. 
 Section 6.11.    Undertaking for Costs. In any suit for the
enforcement of any right or remedy under this Supplemental Indenture or in any suit against the Trustee for any action taken or omitted by it as a Trustee, a court in its discretion may require the filing by any party litigant in the suit of an
undertaking to pay the costs of the suit, and the court in its discretion may assess reasonable costs, including reasonable attorneys’ fees, against any party litigant in the suit, having due regard to the merits and good faith of the claims or
defenses made by the party litigant. This Section 6.11 does not apply to a suit by the Trustee or the Company, a suit by a Holder of a Note pursuant to Section 6.07 hereof, or a suit by Holders of more than 10% in aggregate principal
amount of the then outstanding Notes. 
 ARTICLE 7 

TRUSTEE 

Section 7.01.    Duties of Trustee. 

(a)    If an Event of Default has occurred and is continuing, the Trustee will exercise such of the rights and powers
vested in it by the Indenture, and use the same degree of care and skill in its exercise, as a prudent person would exercise or use under the circumstances in the conduct of such person’s own affairs. 

(b)    Except during the continuance of an Event of Default: 

(1)    the duties of the Trustee will be determined solely by the express provisions of the Indenture and
the Trustee need perform only those duties that are specifically set forth in the Indenture and no others, and no implied covenants or obligations shall be read into the Indenture against the Trustee; and 

(2)    in the absence of bad faith on its part, the Trustee may conclusively rely, as to the truth of the
statements and the correctness of the opinions expressed therein, upon certificates or opinions furnished to the Trustee and conforming to the requirements of this Supplemental Indenture. However, the Trustee will examine the certificates and
opinions to determine whether or not they conform to the requirements of this Supplemental Indenture (but need not confirm or investigate the accuracy of mathematical calculations or other facts stated therein). 

(c)    The Trustee may not be relieved from liabilities for its own negligent action, its own negligent failure to act, or
its own willful misconduct, except that: 
 (1)    this paragraph does not limit the effect of paragraph
(b) of this Section 7.01; 
 (2)    the Trustee will not be liable for any error of judgment
made in good faith by a Responsible Officer, unless it is proved that the Trustee was negligent in ascertaining the pertinent facts; and 

  
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 (3)    the Trustee will not be liable with respect to
any action it takes or omits to take in good faith in accordance with a direction received by it pursuant to Section 6.05 hereof. 

(d)    Whether or not therein expressly so provided, every provision of this Supplemental Indenture that in any way
relates to the Trustee is subject to paragraphs (a), (b), and (c) of this Section 7.01. 
 (e)    No provision
of this Supplemental Indenture will require the Trustee to expend or risk its own funds or incur any liability. The Trustee will be under no obligation to exercise any of its rights or powers under this Supplemental Indenture at the request of any
Holders, unless such Holder has offered to the Trustee security and indemnity satisfactory to it against any loss, liability or expense. 

(f)    The Trustee will not be liable for interest on any money received by it except as the Trustee may agree in writing
with the Company. Money held in trust by the Trustee need not be segregated from other funds except to the extent required by law. 

Section 7.02.    Rights of Trustee. 

(a)    The Trustee may conclusively rely upon any resolution, certificate, statement, instrument, opinion, report, notice,
request, direction, consent, order, bond, debenture, note, other evidence of indebtedness or other paper document believed by it to be genuine and to have been signed or presented by the proper Person. The Trustee need not investigate any fact or
matter stated in the document. 
 (b)    Before the Trustee acts or refrains from acting, it may require an
Officer’s Certificate or an Opinion of Counsel or both. The Trustee will not be liable for any action it takes or omits to take in good faith in reliance on such Officer’s Certificate or Opinion of Counsel. The Trustee may consult with
counsel of its selection and the advice of such counsel or any Opinion of Counsel will be full and complete authorization and protection from liability in respect of any action taken, suffered or omitted by it hereunder in good faith and in reliance
thereon. 
 (c)    The Trustee may act through its attorneys and agents and will not be responsible for the misconduct
or negligence of any agent appointed with due care. 
 (d)    Unless otherwise specifically provided in this
Supplemental Indenture, any demand, request, direction or notice from the Company will be sufficient if signed by an Officer of the Company. 

(e)    The Trustee will be under no obligation to exercise any of the rights or powers vested in it by this Supplemental
Indenture at the request or direction of any of the Holders unless such Holders have offered to the Trustee indemnity or security reasonably satisfactory to the Trustee against the losses, liabilities and expenses that might be incurred by it in
compliance with such request or direction. 
 (f)    The Trustee shall not be bound to make any investigation into the
facts or matters stated in any resolution, certificate, statement, instrument, opinion, report, notice, request, 

  
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direction, consent, order, bond, debenture, note, other evidence of indebtedness or other paper or document, but the Trustee, in its discretion, may make such further inquiry or investigation
into such facts or matters as it may see fit, and, if the Trustee shall determine to make such further inquiry or investigation, it shall be entitled to examine the books, records and premises of the Company, personally or by agent or attorney at
the sole cost of the Company and shall incur no liability or additional liability of any kind by reason of such inquiry or investigation. 

(g)    In no event shall the Trustee be responsible or liable for special, indirect, punitive or consequential loss or
damage of any kind whatsoever (including, but not limited to, loss of profit) irrespective of whether the Trustee has been advised of the likelihood of such loss or damage and regardless of the form of action 

(h)    The Trustee shall not be deemed to have notice of any Default or Event of Default unless written notice of any
event which is in fact such a default is received by the Trustee at the Corporate Trust Office of the Trustee, and such notice references the Securities and this Supplemental Indenture. 

(i)    The rights, privileges, protections, immunities and benefits given to the Trustee, including, without limitation,
its right to be indemnified, are extended to, and shall be enforceable by, the Trustee in each of its capacities hereunder, and each agent, custodian and other Person employed to act hereunder. 

(j)    The Trustee may request that the Company deliver a certificate setting forth the names of individuals and/or titles
of officers authorized at such time to take specified actions pursuant to this Supplemental Indenture. 
 (k)    Any
request or direction of the Company or other Person mentioned herein shall be sufficiently evidenced by an Officer’s Certificate or certificate of an Officer of such Other Person and any resolution of the Board of Directors of the Company or of
such other Person may be sufficiently evidenced by a board resolution certified by the secretary or assistant secretary (or similar officer) of the Company or such other Person. 

(l)    The Trustee shall not be liable for any action taken, suffered, or omitted to be taken by it in good faith and
reasonably believed by it to be authorized or within the discretion or rights or powers conferred upon it by this Supplemental Indenture. 

(m)    In no event shall the Trustee be responsible or liable for special, indirect, punitive or consequential loss or
damage of any kind whatsoever (including, but not limited to, loss of profit) irrespective of whether the Trustee has been advised of the likelihood of such loss or damage and regardless of the form of action. 

(n)    The Trustee shall not be required to give any note, bond or surety in respect of the execution of the trusts and
powers under this Supplemental Indenture. 
 Section 7.03.    Individual Rights of Trustee. The Trustee in
its individual or any other capacity may become the owner or pledgee of Notes and may otherwise deal with the Company or any Affiliate of the Company with the same rights it would have if it were not Trustee. However, in the event that the Trustee
acquires any conflicting interest it must eliminate such 

  
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conflict within 90 days, apply to the SEC for permission to continue as trustee (if this Supplemental Indenture has been qualified under the TIA) or resign. Any Agent may do the same with like
rights and duties. The Trustee is also subject to Sections 7.10 and 7.11 hereof. 

Section 7.04.    Trustee’s Disclaimer. The Trustee will not be responsible for and makes no
representation as to the validity or adequacy of this Supplemental Indenture or the Notes, it shall not be accountable for the Company’s use of the proceeds from the Notes or any money paid to the Company or upon the Company’s direction
under any provision of this Supplemental Indenture, it will not be responsible for the use or application of any money received by any Paying Agent other than the Trustee, and it will not be responsible for any statement or recital herein or any
statement in the Notes or any other document in connection with the sale of the Notes or pursuant to this Supplemental Indenture other than its certificate of authentication. 

Section 7.05.    Notice of Defaults. If a Default or Event of Default occurs and is continuing and if a
Responsible Officer receives written notice of such Default or Event of Default, the Trustee will mail to Holders of Notes a notice of the Default or Event of Default within 90 days after it receives such notice. Except in the case of a Default or
Event of Default in payment of principal of, premium on, if any, interest on, any Note, the Trustee may withhold the notice if and so long as a committee of its Responsible Officers in good faith determines that withholding the notice is in the
interests of the Holders of the Notes. 
 Section 7.06.    Reports by Trustee to Holders of the Notes. 

(a)    Within 60 days after each    May 15 beginning with the    May 15
following the date of this Supplemental Indenture, and for so long as Notes remain outstanding, the Trustee will send to the Holders of the Notes a brief report dated as of such reporting date that complies with TIA §313(a) (but if no event
described in TIA §313(a) has occurred within the twelve months preceding the reporting date, no report need be transmitted). The Trustee also will comply with TIA §313(b)(2). The Trustee will also transmit all reports as required by TIA
§313(c). 
 (b)    A copy of each report at the time of its transmission to the Holders of Notes will be sent by
the Trustee to the Company and filed by the Trustee with the SEC and each stock exchange on which the Notes are listed in accordance with TIA §313(d). The Company will promptly notify the Trustee when the Notes are listed on any stock exchange
and of any delisting thereof. 
 Section 7.07.    Compensation and Indemnity. 

(a)    The Company will pay to the Trustee from time to time such compensation for its acceptance of this Supplemental
Indenture and services hereunder as the Company and the Trustee shall from time to time agree in writing. The Trustee’s compensation will not be limited by any law on compensation of a trustee of an express trust. The Company will reimburse the
Trustee promptly upon request for all reasonable out-of-pocket disbursements, advances and expenses incurred or made by it in addition to the compensation for its
services. Such expenses will include the reasonable compensation, disbursements and expenses of the Trustee’s agents and outside counsel. 

  
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 (b)    The Company and the Guarantors, jointly and severally, will
indemnify the Trustee against any and all losses, damages, claims, liabilities or expenses, including taxes (other than taxes based upon, measured by or determined by the income of the Trustee), incurred by it arising out of or in connection with
the acceptance or administration of its duties under this Supplemental Indenture, including the costs and expenses of enforcing this Supplemental Indenture against the Company and the Guarantors (including this Section 7.07) and defending
itself against any claim (whether asserted by the Company, the Guarantors, any Holder or any other Person) or liability in connection with the exercise or performance of any of its powers or duties hereunder, except to the extent any such loss,
damage, claim, liability or expense shall be determined to have been caused by its own negligence or willful misconduct. The Trustee will notify the Company promptly of any claim for which it may seek indemnity. Failure by the Trustee to so notify
the Company will not relieve the Company or any of the Guarantors of their obligations hereunder. The Company or such Guarantor will defend the claim and the Trustee will cooperate in the defense. The Trustee may have separate counsel and the
Company will pay the reasonable fees and expenses of such counsel; provided, however, that the Company shall not be required to pay such fees and expenses if the Company assumes such defense unless there is a conflict of interest
between the Company and the Trustee in connection with such defense as reasonably determined by the Trustee in consultation with counsel or if there are additional or separate defenses available to the Trustee that are not available to the Company
and the Company is unable to assert any such defense on the Trustee’s behalf . Notwithstanding the foregoing, the Company need not reimburse or pay any fees or expenses or indemnify against any loss, liability, damage, claim or expense incurred
by the Trustee through its own willful misconduct or negligence. Neither the Company nor any Guarantor need pay for any settlement made without its consent, which consent will not be unreasonably withheld. 

(c)    The obligations of the Company and the Guarantors under this Section 7.07 will survive the satisfaction and
discharge of this Supplemental Indenture or the earlier resignation or removal of the Trustee in accordance with the terms of this Supplemental Indenture. 

(d)    To secure the Company’s and the Guarantors’ payment obligations in this Section 7.07, the Trustee
will have a Lien prior to the Notes on all money or property held or collected by the Trustee, except that held in trust to pay principal of, premium on, if any, interest on, particular Notes. Such Lien will survive the satisfaction and discharge of
this Supplemental Indenture. 
 (e)    When the Trustee incurs expenses or renders services after an Event of Default
specified in clause (9) or (10) of Section 6.01 hereof occurs, the expenses and the compensation for the services (including the fees and expenses of its agents and counsel) are intended to constitute expenses of administration under any
Bankruptcy Law. 
 (f)    The Trustee will comply with the provisions of TIA §313(b)(2) to the extent applicable.


  
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 Section 7.08.    Replacement of Trustee. 

(a)    A resignation or removal of the Trustee and appointment of a successor Trustee will become effective only upon the
successor Trustee’s acceptance of appointment as provided in this Section 7.08. 
 (b)    The Trustee may
resign in writing at any time and be discharged from the trust hereby created by so notifying the Company at least 30 days prior to the effective date of such resignation. The Holders of a majority in aggregate principal amount of the then
outstanding Notes may remove the Trustee by so notifying the Trustee and the Company in writing at least 30 days prior to the effective date of such removal. The Company may remove the Trustee if: 

(1)    the Trustee fails to comply with Section 7.10 hereof; 

(2)    the Trustee is adjudged a bankrupt or an insolvent or an order for relief is entered with respect to
the Trustee under any Bankruptcy Law; 
 (3)    a custodian or public officer takes charge of the Trustee
or its property; or 
 (4)    the Trustee becomes incapable of acting. 

(c)    If the Trustee resigns or is removed or if a vacancy exists in the office of Trustee for any reason, the Company
will promptly appoint a successor Trustee. 
 (d)    If a successor Trustee does not take office within 60 days after
the retiring Trustee resigns or is removed, the retiring Trustee, at the expense of the Company, the Company, or the Holders of at least 10% in aggregate principal amount of the then outstanding Notes may petition any court of competent jurisdiction
for the appointment of a successor Trustee. 
 (e)    If the Trustee, after written request by any Holder who has been a
Holder for at least six months, fails to comply with Section 7.10 hereof, such Holder may petition any court of competent jurisdiction for the removal of the Trustee and the appointment of a successor Trustee. 

(f)    A successor Trustee will deliver a written acceptance of its appointment to the retiring Trustee and to the
Company. Thereupon, the resignation or removal of the retiring Trustee will become effective, and the successor Trustee will have all the rights, powers and duties of the Trustee under this Supplemental Indenture. The successor Trustee will mail a
notice of its succession to Holders. The retiring Trustee will promptly transfer all property held by it as Trustee to the successor Trustee; provided all sums owing to the Trustee hereunder have been paid and subject to the Lien provided for
in Section 7.07 hereof. Notwithstanding replacement of the Trustee pursuant to this Section 7.08, the Company’s obligations under Section 7.07 hereof will continue for the benefit of the retiring Trustee. 

Section 7.09.    Successor Trustee by Merger, etc. If the Trustee consolidates with, merges or
converts into, or transfers all or substantially all of its corporate trust business to, another corporation, the successor corporation without any further act will be the successor Trustee. 

  
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 Section 7.10.    Eligibility; Disqualification. There will
at all times be a Trustee hereunder that is a corporation organized and doing business under the laws of the United States of America or of any state thereof that is authorized under such laws to exercise corporate trustee power, that is subject to
supervision or examination by federal or state authorities and that has a combined capital and surplus of at least $100.0 million as set forth in its most recent published annual report of condition. 

This Supplemental Indenture will always have a Trustee who satisfies the requirements of TIA §310(a)(1), (2) and (5). The Trustee is
subject to TIA §310(b). 
 Section 7.11.    Preferential Collection of Claims Against Company. The
Trustee is subject to TIA §311(a), excluding any creditor relationship listed in TIA §311(b). A Trustee who has resigned or been removed shall be subject to TIA §311(a) to the extent indicated therein. 

ARTICLE 8 
 LEGAL DEFEASANCE
AND COVENANT DEFEASANCE 
 Section 8.01.    Option to Effect Legal Defeasance or Covenant Defeasance. The
Company may at any time, at the option of its Board of Directors evidenced by a resolution set forth in an Officer’s Certificate, elect to have either Section 8.02 or 8.03 hereof be applied to all outstanding Notes upon compliance with the
conditions set forth below in this Article 8. 
 Section 8.02.    Legal Defeasance and Discharge. Upon the
Company’s exercise under Section 8.01 hereof of the option applicable to this Section 8.02, the Company and each of the Guarantors will, subject to the satisfaction of the conditions set forth in Section 8.04 hereof, be deemed to
have been discharged from their obligations with respect to all outstanding Notes (including the Note Guarantees) on the date the conditions set forth below are satisfied (hereinafter, “Legal Defeasance”). For this purpose, Legal
Defeasance means that the Company and the Guarantors will be deemed to have paid and discharged the entire Indebtedness represented by the outstanding Notes (including the Note Guarantees), which will thereafter be deemed to be
“outstanding” only for the purposes of Section 8.05 hereof and the other Sections of this Supplemental Indenture referred to in clauses (1) and (2) below, and to have satisfied all their other obligations under such Notes, the
Note Guarantees and this Supplemental Indenture (and the Trustee, on demand of and at the expense of the Company, shall execute proper instruments acknowledging the same), except for the following provisions which will survive until otherwise
terminated or discharged hereunder: 
 (1)    the rights of Holders of outstanding Notes to receive
payments in respect of the principal of, premium on, if any, or interest on, such Notes when such payments are due from the trust referred to in Section 8.04 hereof; 

(2)    the Company’s obligations with respect to such Notes under Article 2 and Section 4.02
hereof; 
 (3)    the rights, powers, trusts, duties and immunities of the Trustee hereunder, and the
Company’s and the Guarantors’ obligations in connection therewith; and 
 (4)    this Article
8. 

  
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 Subject to compliance with this Article 8, the Company may exercise its option under this
Section 8.02 notwithstanding the prior exercise of its option under Section 8.03 hereof. 

Section 8.03.    Covenant Defeasance. Upon the Company’s exercise under Section 8.01 hereof of the
option applicable to this Section 8.03, the Company and each of the Guarantors will, subject to the satisfaction of the conditions set forth in Section 8.04 hereof, be released from each of their obligations under the covenants contained
in Sections 4.07, 4.08, 4.09, 4.10, 4.11, 4.12, 4.13, 4.15, 4.16, 4.17, 4.18, 4.19 and 4.20 hereof and clause (4) of Section 5.01 hereof with respect to the outstanding Notes on and after the date the conditions set forth in
Section 8.04 hereof are satisfied (hereinafter, “Covenant Defeasance”), and the Notes will thereafter be deemed not “outstanding” for the purposes of any direction, waiver, consent or declaration or act of Holders
(and the consequences of any thereof) in connection with such covenants, but will continue to be deemed “outstanding” for all other purposes hereunder (it being understood that such Notes will not be deemed outstanding for accounting
purposes). For this purpose, Covenant Defeasance means that, with respect to the outstanding Notes and Note Guarantees, the Company and the Guarantors may omit to comply with and will have no liability in respect of any term, condition or limitation
set forth in any such covenant, whether directly or indirectly, by reason of any reference elsewhere herein to any such covenant or by reason of any reference in any such covenant to any other provision herein or in any other document and such
omission to comply will not constitute a Default or an Event of Default under Section 6.01 hereof, but, except as specified above, the remainder of this Supplemental Indenture and such Notes and Note Guarantees will be unaffected thereby. In
addition, upon the Company’s exercise under Section 8.01 hereof of the option applicable to this Section 8.03, subject to the satisfaction of the conditions set forth in Section 8.04 hereof, Sections 6.01(3), (4), (5), (6), (7)
and (8) hereof will not constitute Events of Default. 
 Section 8.04.    Conditions to Legal or Covenant
Defeasance. In order to exercise either Legal Defeasance or Covenant Defeasance under either Section 8.02 or 8.03 hereof: 

(1)    the Company must irrevocably deposit with the Trustee, in trust, for the benefit of the Holders,
cash in U.S. dollars, non-callable Government Securities, or a combination thereof, in such amounts as will be sufficient, in the opinion of a nationally recognized investment bank, appraisal firm, or firm of
independent public accountants, to pay the principal of, premium on, if any, and interest on, the outstanding Notes on the stated date for payment thereof or on the applicable redemption date, as the case may be, and the Company must specify whether
the Notes are being defeased to such stated date for payment or to a particular redemption date; 

(2)    in the case of an election under Section 8.02 hereof, the Company must deliver to the Trustee
an opinion of U.S. tax counsel reasonably acceptable to the Trustee confirming that: 
 (A)    the
Company has received from, or there has been published by, the U.S. Internal Revenue Service a ruling; or 

(B)    since the date of this Supplemental Indenture, there has been a change in the applicable U.S.
federal income tax law, 

  
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 in either case to the effect that, and based thereon such Opinion of Counsel shall confirm
that, the beneficial owners of the outstanding Notes will not recognize income, gain or loss for U.S. federal income tax purposes as a result of such Legal Defeasance and will be subject to U.S. federal income tax on the same amounts, in the same
manner and at the same times as would have been the case if such Legal Defeasance had not occurred; 

(3)    in the case of an election under Section 8.03 hereof, the Company must deliver to the Trustee
an opinion of U.S. tax counsel reasonably acceptable to the Trustee confirming that the beneficial owners of the outstanding Notes will not recognize income, gain or loss for U.S. federal income tax purposes as a result of such Covenant Defeasance
and will be subject to U.S. federal income tax on the same amounts, in the same manner and at the same times as would have been the case if such Covenant Defeasance had not occurred; 

(4)    no Default or Event of Default shall have occurred and be continuing on the date of such deposit
(other than a Default or Event of Default resulting from the borrowing of funds to be applied to such deposit (and any similar concurrent deposit relating to other Indebtedness), and the granting of Liens to secure such borrowings); 

(5)    such Legal Defeasance or Covenant Defeasance will not result in a breach or violation of, or
constitute a default under, any material agreement or instrument (other than this Supplemental Indenture, the Notes, the Note Guarantees and the agreements governing any other Indebtedness being defeased, discharged or replaced) to which the Company
or any of the Guarantors is a party or by which the Company or any of the Guarantors is bound; 

(6)    the Company must deliver to the Trustee an Officer’s Certificate stating that the deposit was
not made by the Company with the intent of preferring the Holders of Notes over the other creditors of the Company with the intent of defeating, hindering, delaying or defrauding any creditors of the Company or others; and 

(7)    the Company must deliver to the Trustee an Officer’s Certificate and an Opinion of Counsel,
each stating that all conditions precedent relating to the Legal Defeasance or the Covenant Defeasance have been complied with. 

Section 8.05.    Deposited Money and Government Securities to be Held in Trust; Other Miscellaneous
Provisions. Subject to Section 8.06 hereof, all money and non-callable Government Securities (including the proceeds thereof) deposited with the Trustee (or other qualifying trustee, collectively for
purposes of this Section 8.05, the “Trustee”) pursuant to Section 8.04 hereof in respect of the outstanding Notes will be held in trust and applied by the Trustee, in accordance with the provisions of such Notes and this
Supplemental Indenture, to the payment, either directly or through any Paying Agent (including the Company acting as Paying Agent) as the Trustee may determine, to the Holders of such Notes of all sums due and to become due thereon in respect of
principal, premium, if any, interest but such money need not be segregated from other funds except to the extent required by law. 

  
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 The Company will pay and indemnify the Trustee against any tax, fee or other charge imposed
on or assessed against the cash or non-callable Government Securities deposited pursuant to Section 8.04 hereof or the principal and interest received in respect thereof other than any such tax, fee or
other charge which by law is for the account of the Holders of the outstanding Notes. 
 Notwithstanding anything in this Article 8 to the
contrary, the Trustee will deliver or pay to the Company from time to time upon the request of the Company any money or non-callable Government Securities held by it as provided in Section 8.04 hereof
which, in the opinion of a nationally recognized investment bank, appraisal firm or firm of independent public accountants expressed in a written certification thereof delivered to the Trustee (which may be the opinion delivered under
Section 8.04(1) hereof), are in excess of the amount thereof that would then be required to be deposited to effect an equivalent Legal Defeasance or Covenant Defeasance. 

Section 8.06.    Repayment to Company. Any money deposited with the Trustee or any Paying Agent, or then held
by the Company, in trust for the payment of the principal of, premium on, if any, interest on any Note and remaining unclaimed for two years after such principal, premium, if any, interest has become due and payable shall be paid to the Company on
its request or (if then held by the Company) will be discharged from such trust; and the Holder of such Note will thereafter be permitted to look only to the Company for payment thereof, and all liability of the Trustee or such Paying Agent with
respect to such trust money, and all liability of the Company as trustee thereof, will thereupon cease; provided, however, that the Trustee or such Paying Agent, before being required to make any such repayment, may at the expense of
the Company cause to be published once, in the New York Times and The Wall Street Journal (national edition), notice that such money remains unclaimed and that, after a date specified therein, which will not be less than 30 days from the date of
such notification or publication, any unclaimed balance of such money then remaining will be repaid to the Company. 

Section 8.07.    Reinstatement. If the Trustee or Paying Agent is unable to apply any U.S. dollars or non-callable Government Securities in accordance with Section 8.02 or 8.03 hereof, as the case may be, by reason of any order or judgment of any court or governmental authority enjoining, restraining or
otherwise prohibiting such application, then the Company’s and the Guarantors’ obligations under this Supplemental Indenture and the Notes and the Note Guarantees will be revived and reinstated as though no deposit had occurred pursuant to
Section 8.02 or 8.03 hereof until such time as the Trustee or Paying Agent is permitted to apply all such money in accordance with Section 8.02 or 8.03 hereof, as the case may be; provided, however, that, if the Company makes
any payment of principal of, premium on, if any, interest on, any Note following the reinstatement of its obligations, the Company will be subrogated to the rights of the Holders of such Notes to receive such payment from the money held by the
Trustee or Paying Agent. 
 ARTICLE 9 

AMENDMENT, SUPPLEMENT AND WAIVER 

Section 9.01.    Without Consent of Holders of Notes. Notwithstanding Section 9.02 of this Supplemental
Indenture, without the consent of any Holder of Notes, the Company, the 

  
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Guarantors and the Trustee may amend or supplement this Supplemental Indenture, the Notes or the Note Guarantees: 

(1)    to cure any ambiguity, omission, defect or inconsistency; 

(2)    to provide for the assumption of the Company’s or a Guarantor’s obligations to the Holders
of the Notes and Note Guarantees by a successor to the Company or such Guarantor pursuant to Article 5 or Article 10 hereof; 

(3)    to make any change that would provide any additional rights or benefits to the Holders of the Notes
or that does not materially adversely affect the legal rights hereunder of any Holder; 
 (4)    to
comply with requirements of the SEC in order to effect or maintain the qualification of this Supplemental Indenture under the TIA; 

(5)    to conform the text of this Supplemental Indenture, the Notes, or Note Guarantees to any provision
of the “Description of the Notes” or “Description of Debt Securities” sections of the Company’s Prospectus to the extent that such provisions in such sections were intended to be a verbatim recitation of a provision of this
Supplemental Indenture, the Notes, or the Note Guarantees, which intent may be evidenced by an Officer’s Certificate to that effect; 

(6)    to provide for the issuance of Additional Notes in accordance with the limitations set forth in this
Supplemental Indenture as of the date hereof; 
 (7)    to allow any Guarantor to execute a supplemental
indenture and/or a Note Guarantee with respect to the Notes; or 
 (8)    to make any other change that
does not adversely affect the rights of any Holder of the Notes. 
 Upon the request of the Company accompanied by a resolution of its Board
of Directors authorizing the execution of any such amended or supplemental indenture, and upon receipt by the Trustee of the documents described in Section 7.02(b) hereof, the Trustee will join with the Company and the Guarantors in the
execution of any amended or supplemental indenture authorized or permitted by the terms of this Supplemental Indenture and to make any further appropriate agreements and stipulations that may be therein contained, but the Trustee will not be
obligated to enter into such amended or supplemental indenture that affects its own rights, duties or immunities under this Supplemental Indenture or otherwise. 

Section 9.02.    With Consent of Holders of Notes. Except as provided below in this Section 9.02, the
Company and the Trustee may amend or supplement this Supplemental Indenture (including, without limitation, Sections 3.09, 4.10 and 4.15 hereof) and the Notes and the Note Guarantees with the consent of the Holders of at least a majority in
aggregate principal amount of the then outstanding Notes (including, without limitation, Additional Notes, if any) voting as a single class (including, without limitation, consents obtained in connection with a tender offer or exchange offer for, or
purchase of, the Notes), and, subject to Sections 6.04 and 

  
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6.07 hereof, any existing Default or Event of Default (other than a Default or Event of Default in the payment of the principal of, premium on, if any, or interest on, the Notes, except a payment
default resulting from an acceleration that has been rescinded) or compliance with any provision of this Supplemental Indenture or the Notes or the Note Guarantees may be waived with the consent of the Holders of a majority in aggregate principal
amount of the then outstanding Notes (including, without limitation, Additional Notes, if any) voting as a single class (including, without limitation, consents obtained in connection with a purchase of, or tender offer or exchange offer for, the
Notes). Section 2.08 hereof shall determine which Notes are considered to be “outstanding” for purposes of this Section 9.02. 

Upon the request of the Company accompanied by a resolution of its Board of Directors authorizing the execution of any such amended or
supplemental indenture, and upon the filing with the Trustee of evidence satisfactory to the Trustee of the consent of the Holders of Notes as aforesaid, and upon receipt by the Trustee of the documents described in Section 7.02(b) hereof, the
Trustee will join with the Company and the Guarantors in the execution of such amended or supplemental indenture unless such amended or supplemental indenture directly affects the Trustee’s own rights, duties or immunities under this
Supplemental Indenture or otherwise, in which case the Trustee may in its discretion, but will not be obligated to, enter into such amended or supplemental indenture. 

It is not necessary for the consent of the Holders of Notes under this Section 9.02 to approve the particular form of any proposed
amendment, supplement or waiver, but it is sufficient if such consent approves the substance thereof. 
 After an amendment, supplement or
waiver under this Section 9.02 becomes effective, the Company will mail to the Holders of Notes affected thereby a notice briefly describing the amendment, supplement or waiver. Any failure of the Company to mail such notice, or any defect
therein, will not, however, in any way impair or affect the validity of any such amended or supplemental indenture or waiver. Subject to Sections 6.04 and 6.07 hereof, the Holders of a majority in aggregate principal amount of the Notes then
outstanding voting as a single class may waive compliance in a particular instance by the Company with any provision of this Supplemental Indenture, the Notes or the Note Guarantees. However, without the consent of each Holder affected, an
amendment, supplement or waiver under this Section 9.02 may not (with respect to any Notes held by a non-consenting Holder): 

(1)    reduce the principal amount of Notes whose Holders must consent to an amendment, supplement or
waiver; 
 (2)    reduce the principal of or change the fixed maturity of any Note or alter or waive any
of the provisions with respect to the redemption of the Notes (except as provided above with respect to Sections 3.09, 4.10 and 4.15 hereof); 

(3)    reduce the rate of or change the time for payment of interest, including default interest, on any
Note; 
 (4)    waive a Default or Event of Default in the payment of principal of, premium on, if any,
or interest on, the Notes (except a rescission of acceleration of the 

  
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Notes by the Holders of at least a majority in aggregate principal amount of the then outstanding Notes and a waiver of the payment default that resulted from such acceleration); 

(5)    make any Note payable in money other than that stated in the Notes; 

(6)    make any change in the provisions of this Supplemental Indenture relating to waivers of past
Defaults or the rights of Holders of Notes to receive payments of principal of, premium on, if any, or interest on, the Notes; 

(7)    waive a redemption payment with respect to any Note (other than a payment required by Sections 3.09,
4.10 or 4.15 hereof); 
 (8)    release any Guarantor from any of its obligations under its Note
Guarantee or this Supplemental Indenture, except in accordance with the terms of this Supplemental Indenture; or 

(9)    make any change in the preceding amendment and waiver provisions. 

Section 9.03.    Compliance with Trust Indenture Act. Every amendment or supplement to this Supplemental
Indenture or the Notes will be set forth in an amended or supplemental indenture that complies with the TIA as then in effect. 

Section 9.04.    Revocation and Effect of Consents. Until an amendment, supplement or waiver becomes
effective, a consent to it by a Holder of a Note is a continuing consent by the Holder of a Note and every subsequent Holder of a Note or portion of a Note that evidences the same debt as the consenting Holder’s Note, even if notation of the
consent is not made on any Note. However, any such Holder of a Note or subsequent Holder of a Note may revoke the consent as to its Note if the Trustee receives written notice of revocation before the date the amendment, supplement or waiver becomes
effective. An amendment, supplement or waiver becomes effective in accordance with its terms and thereafter binds every Holder. 

Section 9.05.    Notation on or Exchange of Notes. The Trustee may place an appropriate notation about an
amendment, supplement or waiver on any Note thereafter authenticated. The Company in exchange for all Notes may issue and the Trustee shall, upon receipt of an Authentication Order, authenticate new Notes that reflect the amendment, supplement or
waiver. 
 Failure to make the appropriate notation or issue a new Note will not affect the validity and effect of such amendment,
supplement or waiver. 
 Section 9.06.    Trustee to Sign Amendments, etc. The Trustee will
sign any amended or supplemental indenture authorized pursuant to this Article 9 if the amendment or supplement does not adversely affect the rights, duties, liabilities or immunities of the Trustee. The Company may not sign an amended or
supplemental indenture until the Board of Directors of the Company approves it. In executing any amended or supplemental indenture, the Trustee shall receive and (subject to Section 7.01 hereof) will be fully protected in relying upon, in
addition to the documents required by Section 13.04 hereof, an Officer’s Certificate and an Opinion of Counsel stating that the execution of such amended or supplemental indenture is authorized or permitted by this Supplemental Indenture.


  
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 ARTICLE 10 

NOTE GUARANTEES 

Section 10.01.    Guarantee. 

(a)    Subject to this Article 10, each of the Guarantors hereby, jointly and severally, unconditionally guarantees to
each Holder of a Note authenticated and delivered by the Trustee and to the Trustee and its successors and assigns, irrespective of the validity and enforceability of this Supplemental Indenture, the Notes or the obligations of the Company hereunder
or thereunder, that: 
 (1)    the principal of, premium, if any, on, interest on the Notes will be
promptly paid in full when due, whether at maturity, by acceleration, redemption or otherwise, and interest on the overdue principal of, premium on, if any, interest on, the Notes, if lawful, and all other obligations of the Company to the Holders
or the Trustee hereunder or thereunder will be promptly paid in full or performed, all in accordance with the terms hereof and thereof; and 

(2)    in case of any extension of time of payment or renewal of any Notes or any of such other
obligations, that same will be promptly paid in full when due or performed in accordance with the terms of the extension or renewal, whether at Stated Maturity, by acceleration or otherwise. 

Failing payment when due of any amount so guaranteed or any performance so guaranteed for whatever reason, the Guarantors will be jointly and
severally obligated to pay the same immediately. Each Guarantor agrees that this is a guarantee of payment and not a guarantee of collection. 

(b)    The Guarantors hereby agree that their obligations hereunder are unconditional, irrespective of the validity,
regularity or enforceability of the Notes or this Supplemental Indenture, the absence of any action to enforce the same, any waiver or consent by any Holder of the Notes with respect to any provisions hereof or thereof, the recovery of any judgment
against the Company, any action to enforce the same or any other circumstance which might otherwise constitute a legal or equitable discharge or defense of a guarantor. Each Guarantor hereby waives diligence, presentment, demand of payment, filing
of claims with a court in the event of insolvency or bankruptcy of the Company, any right to require a proceeding first against the Company, protest, notice and all demands whatsoever and covenant that this Note Guarantee will not be discharged
except by complete performance of the obligations contained in the Notes and this Supplemental Indenture. 
 (c)    If
any Holder or the Trustee is required by any court or otherwise to return to the Company, the Guarantors or any custodian, trustee, liquidator or other similar official acting in relation to either the Company or the Guarantors, any amount paid by
either to the Trustee or such Holder, this Note Guarantee, to the extent theretofore discharged, will be reinstated in full force and effect. 

  
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 (d)    Each Guarantor agrees that it will not be entitled to any right
of subrogation in relation to the Holders in respect of any obligations guaranteed hereby until payment in full of all obligations guaranteed hereby. Each Guarantor further agrees that, as between the Guarantors, on the one hand, and the Holders and
the Trustee, on the other hand, (1) the maturity of the obligations guaranteed hereby may be accelerated as provided in Article 6 hereof for the purposes of this Note Guarantee, notwithstanding any stay, injunction or other prohibition
preventing such acceleration in respect of the obligations guaranteed hereby, and (2) in the event of any declaration of acceleration of such obligations as provided in Article 6 hereof, such obligations (whether or not due and payable) will
forthwith become due and payable by the Guarantors for the purpose of this Note Guarantee. The Guarantors will have the right to seek contribution from any non-paying Guarantor so long as the exercise of such
right does not impair the rights of the Holders under the Note Guarantee. 
 Section 10.02.    Limitation on
Guarantor Liability. Each Guarantor, and by its acceptance of Notes, each Holder, hereby confirms that it is the intention of all such parties that the Note Guarantee of such Guarantor not constitute a fraudulent transfer or conveyance for
purposes of Bankruptcy Law, the Uniform Fraudulent Conveyance Act, the Uniform Fraudulent Transfer Act or any similar federal or state law to the extent applicable to any Note Guarantee. To effectuate the foregoing intention, the Trustee, the
Holders and the Guarantors hereby irrevocably agree that the obligations of such Guarantor will be limited to the maximum amount that will, after giving effect to such maximum amount and all other contingent and fixed liabilities of such Guarantor
that are relevant under such laws, and after giving effect to any collections from, rights to receive contribution from or payments made by or on behalf of any other Guarantor in respect of the obligations of such other Guarantor under this Article
10, result in the obligations of such Guarantor under its Note Guarantee not constituting a fraudulent transfer or conveyance. 

Section 10.03.    Execution and Delivery of Note Guarantee. To evidence its Note Guarantee set forth in
Section 10.01 hereof, each Guarantor hereby agrees that a notation of such Note Guarantee substantially in the form attached as Exhibit B hereto will be endorsed by an Officer of such Guarantor on each Note authenticated and delivered by the
Trustee and that this Supplemental Indenture will be executed on behalf of such Guarantor by one of its Officers. 
 Each Guarantor hereby
agrees that its Note Guarantee set forth in Section 10.01 hereof will remain in full force and effect notwithstanding any failure to endorse on each Note a notation of such Note Guarantee. 

If an Officer whose signature is on this Supplemental Indenture or on the Note Guarantee no longer holds that office at the time the Trustee
authenticates the Note on which a Note Guarantee is endorsed, the Note Guarantee will be valid nevertheless. 
 The delivery of any Note by
the Trustee, after the authentication thereof hereunder, will constitute due delivery of the Note Guarantee set forth in this Supplemental Indenture on behalf of the Guarantors. 

In the event that any of the Company’s Restricted Subsidiaries that is not a Guarantor becomes a borrower or guarantor under the Senior
Credit Facility or Guarantees any other 

  
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Indebtedness of the Company, which other Indebtedness exceeds $10.0 million in aggregate principal amount, the Company will cause such Restricted Subsidiary to Guarantee the Notes on a
senior unsecured basis pursuant to the provisions of Section 4.18 hereof and this Article 10, to the extent applicable. 

Section 10.04.    Guarantors May Consolidate, etc., on Certain Terms. Except as
otherwise provided in Section 10.05 hereof, a Guarantor may not sell or otherwise dispose of all or substantially all of its assets to, or consolidate with or merge with or into (whether or not such Guarantor is the surviving Person) another
Person, other than the Company or another Guarantor, unless: 
 (1)    immediately after giving effect to
such transaction, no Default or Event of Default exists; and 
 (2)    either: 

(A)    subject to Section 10.05 hereof, the Person acquiring the property in any such sale or
disposition or the Person formed by or surviving any such consolidation or merger unconditionally assumes all the obligations of that Guarantor under its Note Guarantee, and this Supplemental Indenture on the terms set forth herein or therein,
pursuant to a supplemental indenture satisfactory to the Trustee; or 
 (B)    the Net Proceeds of such
asset sale or other disposition, consolidation or merger are applied in accordance with the applicable provisions of this Supplemental Indenture, including without limitation, Section 4.10 hereof. 

In case of any such consolidation, merger, sale or conveyance and upon the assumption by the successor Person, by supplemental indenture,
executed and delivered to the Trustee and satisfactory in form to the Trustee, of the Note Guarantee endorsed upon the Notes and the due and punctual performance of all of the covenants and conditions of this Supplemental Indenture to be performed
by the Guarantor, such successor Person will succeed to and be substituted for the Guarantor with the same effect as if it had been named herein as a Guarantor. Such successor Person thereupon may cause to be signed any or all of the Note Guarantees
to be endorsed upon all of the Notes issuable hereunder which theretofore shall not have been signed by the Company and delivered to the Trustee. All the Note Guarantees so issued will in all respects have the same legal rank and benefit under this
Supplemental Indenture as the Note Guarantees theretofore and thereafter issued in accordance with the terms of this Supplemental Indenture as though all of such Note Guarantees had been issued at the date of the execution hereof. 

Except as set forth in Articles 4 and 5 hereof, and notwithstanding clauses 2(A) and (B) above, nothing contained in this Supplemental
Indenture or in any of the Notes will prevent any consolidation or merger of a Guarantor with or into the Company or another Guarantor, or will prevent any sale or conveyance of the property of a Guarantor as an entirety or substantially as an
entirety to the Company or another Guarantor. 

  
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 Section 10.05.    Releases. 

(a)    The Note Guarantee of a Guarantor will be released: 

(1)    in connection with any sale or other disposition of all or substantially all of the assets of that
Guarantor, by way of merger, consolidation or otherwise, to a Person that is not (either before or after giving effect to such transaction) the Company or a Restricted Subsidiary of the Company, if the sale or other disposition does not violate
Section 4.10 hereof; 
 (2)    in connection with any sale or other disposition of Capital Stock of
that Guarantor to a Person that is not (either before or after giving effect to such transaction) the Company or a Restricted Subsidiary of the Company, if the sale or other disposition does not violate Section 4.10 hereof and the Guarantor
ceases to be a Restricted Subsidiary of the Company as a result of the sale or other disposition; 

(3)    if the Company designates any Restricted Subsidiary that is a Guarantor to be an Unrestricted
Subsidiary in accordance with the applicable provisions of this Supplemental Indenture; 
 (4)    if the
Guarantor ceases to be a borrower or guarantor under all Credit Facilities and is released or discharged from all obligations thereunder and such Guarantor is released or discharged from its Guarantee of any other Indebtedness of the Company in
excess of $10.0 million in aggregate principal amount, including the Guarantee that resulted in the obligation of such Guarantor to Guarantee the Notes; provided that if such Person has incurred any Indebtedness in reliance on its status
as a Guarantor under Section 4.09 hereof such Guarantor’s obligations under such Indebtedness, as the case may be, so incurred are satisfied in full and discharged or are otherwise permitted to be Incurred by a Restricted Subsidiary (other
than a Guarantor) under Section 4.09 hereof; or 
 (5)    upon Legal Defeasance or Covenant
Defeasance in accordance with Article 8 hereof or satisfaction and discharge of this Supplemental Indenture in accordance with Article 11 hereof. 

(b)    Any Guarantor not released from its obligations under its Note Guarantee as provided in this Section 10.05
will remain liable for the full amount of principal of, premium on, if any, interest on, the Notes and for the other obligations of any Guarantor under this Supplemental Indenture as provided in this Article 10. 

ARTICLE 11 
 SATISFACTION AND
DISCHARGE 
 Section 11.01.    Satisfaction and Discharge. This Supplemental Indenture will be discharged
and will cease to be of further effect as to all Notes issued hereunder, when: 
 (1)    either: 

(A)    all Notes that have been authenticated, except lost, stolen or destroyed Notes that have been
replaced or paid and Notes for whose payment money has been deposited in trust and thereafter repaid to the Company, have been delivered to the Trustee for cancellation; or 

  
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 (B)    all Notes that have not been delivered to the
Trustee for cancellation have become due and payable by reason of the mailing of a notice of redemption or otherwise or will become due and payable within one year and the Company or any Guarantor has irrevocably deposited or caused to be deposited
with the Trustee as trust funds in trust solely for the benefit of the Holders, cash in U.S. dollars, non-callable Government Securities, or a combination thereof, in amounts as will be sufficient, without
consideration of any reinvestment of interest, to pay and discharge the entire Indebtedness on the Notes not delivered to the Trustee for cancellation for principal of, premium on, if any, and interest on, the Notes to the date of maturity or
redemption; 
 (2)    in respect of subclause (B) of clause (1) of this Section 11.01, no
Default or Event of Default has occurred and is continuing on the date of the deposit (other than a Default or Event of Default resulting from the borrowing of funds to be applied to such deposit and any similar deposit relating to other
Indebtedness and, in each case, the granting of Liens to secure such borrowings) and the deposit will not result in a breach or violation of, or constitute a default under, any other instrument to which the Company or any Guarantor is a party or by
which the Company or any Guarantor is bound (other than with respect to the borrowing of funds to be applied concurrently to make the deposit required to effect such satisfaction and discharge and any similar concurrent deposit relating to other
Indebtedness, and in each case the granting of Liens to secure such borrowings); 
 (3)    the Company or
any Guarantor has paid or caused to be paid all other sums payable by it under this Supplemental Indenture; and 

(4)    the Company has delivered irrevocable instructions to the Trustee under this Supplemental Indenture
to apply the deposited money toward the payment of the Notes at maturity or on the redemption date, as the case may be. 
 In addition, the Company must
deliver an Officer’s Certificate and an Opinion of Counsel to the Trustee stating that all conditions precedent to satisfaction and discharge have been satisfied. 

Notwithstanding the satisfaction and discharge of this Supplemental Indenture, if money has been deposited with the Trustee pursuant to
subclause (b) of clause (1) of this Section 11.01, the provisions of Sections 11.02 and 8.06 hereof will survive. In addition, nothing in this Section 11.01 will be deemed to discharge those provisions of Section 7.07
hereof, that, by their terms, survive the satisfaction and discharge of this Supplemental Indenture. 

Section 11.02.    Application of Trust Money. Subject to the provisions of Section 8.06 hereof, all money
deposited with the Trustee pursuant to Section 11.01 hereof shall be held in trust and applied by it, in accordance with the provisions of the Notes and this Supplemental 

  
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Indenture, to the payment, either directly or through any Paying Agent (including the Company acting as its own Paying Agent) as the Trustee may determine, to the Persons entitled thereto, of the
principal, premium, if any, and interest for whose payment such money has been deposited with the Trustee; but such money need not be segregated from other funds except to the extent required by law. 

If the Trustee or Paying Agent is unable to apply any money or Government Securities in accordance with Section 11.01 hereof by reason of
any legal proceeding or by reason of any order or judgment of any court or governmental authority enjoining, restraining or otherwise prohibiting such application, the Company’s and any Guarantor’s obligations under this Supplemental
Indenture and the Notes shall be revived and reinstated as though no deposit had occurred pursuant to Section 11.01 hereof; provided that if the Company has made any payment of principal of, premium on, if any, and interest on, any Notes
because of the reinstatement of its obligations, the Company shall be subrogated to the rights of the Holders of such Notes to receive such payment from the money or Government Securities held by the Trustee or Paying Agent. 

ARTICLE 12 
 [RESERVED] 

ARTICLE 13 
 MISCELLANEOUS

 Section 13.01.    Trust Indenture Act Controls. If any provision of this Supplemental Indenture limits,
qualifies or conflicts with the duties imposed by TIA §318(c), the imposed duties will control. 

Section 13.02.    Notices. Any notice or communication by the Company, any Guarantor or the Trustee to the
others is duly given if in writing and delivered in Person or by first class mail (registered or certified, return receipt requested), facsimile transmission or any electronic means Trustee and the Company agree to accept, overnight air courier
guaranteeing next day delivery, to the others’ address: 
 If to the Company and/or any Guarantor: 

Hecla Mining Company 
 6500 N.
Mineral Drive, Suite 200 
 Coeur d’Alene, Idaho 

Facsimile: (208) 209-1278 

Attention: David Sienko, Esq. 

With a copy to: 
 K&L Gates
LLP 
 70 West Madison Street, Suite 3100 

Chicago, IL 60602 
 Facsimile:
(312) 827-8047 
 Attention: J. Craig Walker, Esq. 

  
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 And to: 

Sheppard Mullin Richter & Hampton LLP 

70 West Madison Street, Suite 4800 

Chicago, IL 60602 
 Facsimile:
(312) 499-6301 
 Attention: Kenneth A. Peterson, Jr., Esq. 

If to the Trustee: 
 The Bank of
New York Mellon Trust Company, N.A. 
 400 South Hope Street, Suite 400 

Los Angeles, California, 90071 

Facsimile No.: (213) 630-6298 

Attention: Corporate Unit 
 The
Company, any Guarantor or the Trustee, by notice to the others, may designate additional or different addresses for subsequent notices or communications. 

All notices and communications (other than those sent to Holders) will be deemed to have been duly given: at the time delivered by hand, if
personally delivered; five Business Days after being deposited in the mail, postage prepaid, if mailed; when receipt acknowledged, if transmitted by facsimile or other electronic means; and the next Business Day after timely delivery to the courier,
if sent by overnight air courier guaranteeing next day delivery. 
 Any notice or communication to a Holder will be mailed by first class
mail, certified or registered, return receipt requested, or by overnight air courier guaranteeing next day delivery to its address shown on the register kept by the Registrar. Any notice or communication will also be so mailed to any Person
described in TIA §313(c), to the extent required by the TIA. Failure to mail a notice or communication to a Holder or any defect in it will not affect its sufficiency with respect to other Holders. 

If a notice or communication is mailed or otherwise delivered in the manner provided above within the time prescribed, it is duly given,
whether or not the addressee receives it. 
 If the Company mails a notice or communication to Holders, it will mail a copy to the Trustee
and each Agent at the same time. 
 The Trustee agrees to accept and act upon instructions or directions pursuant to this Supplemental
Indenture sent by unsecured e-mail, pdf, facsimile transmission or other similar unsecured electronic methods, provided, however, that the Trustee shall have received an incumbency certificate listing persons
designated to give such instructions or directions and containing specimen signatures of such designated persons, which such incumbency certificate shall be amended and replaced whenever a person is to be added or deleted from the listing. If the
Company elects to give the Trustee e-mail or facsimile instructions (or instructions by a similar electronic method) and the Trustee in its discretion elects to act upon such instructions, the Trustee’s
understanding of such instructions shall be deemed controlling. The Trustee shall not be liable for any losses, costs or expenses arising directly or indirectly from the Trustee’s 

  
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reliance upon and compliance with such instructions notwithstanding such instructions conflict or are inconsistent with a subsequent written instruction. The Company agrees to assume all risks
arising out of the use of such electronic methods to submit instructions and directions to the Trustee, including without limitation the risk of the Trustee acting on unauthorized instructions, and the risk or interception and misuse by third
parties. 
 Section 13.03.    Communication by Holders of Notes with Other Holders of Notes. Holders may
communicate pursuant to TIA §312(b) with other Holders with respect to their rights under this Supplemental Indenture or the Notes. The Company, the Guarantors, the Trustee, the Registrar and any other Person shall have the protection of TIA
§312(c). 
 Section 13.04.    Certificate and Opinion as to Conditions Precedent. Upon any request or
application by the Company to the Trustee to take any action under this Supplemental Indenture, the Company shall furnish to the Trustee: 

(1)    an Officer’s Certificate in form and substance reasonably satisfactory to the Trustee (which
must include the statements set forth in Section 13.05 hereof) stating that, in the opinion of the signers, all conditions precedent and covenants, if any, provided for in this Supplemental Indenture relating to the proposed action have been
satisfied; and 
 (2)    an Opinion of Counsel in form and substance reasonably satisfactory to the
Trustee (which must include the statements set forth in Section 13.05 hereof) stating that, in the opinion of such counsel, all such conditions precedent and covenants have been satisfied. 

Section 13.05.    Statements Required in Certificate or Opinion. Each certificate or opinion with respect to
compliance with a condition or covenant provided for in this Supplemental Indenture (other than a certificate provided pursuant to TIA §314(a)(4)) must comply with the provisions of TIA §314(e) and must include: 

(1)    a statement that the Person making such certificate or opinion has read such covenant or condition;

 (2)    a brief statement as to the nature and scope of the examination or investigation upon which the
statements or opinions contained in such certificate or opinion are based; 
 (3)    a statement that, in
the opinion of such Person, he or she has made such examination or investigation as is necessary to enable him or her to express an informed opinion as to whether or not such covenant or condition has been satisfied; and 

(4)    a statement as to whether or not, in the opinion of such Person, such condition or covenant has been
satisfied. 
 Section 13.06.    Rules by Trustee and Agents. The Trustee may make reasonable rules for
action by or at a meeting of Holders. The Registrar or Paying Agent may make reasonable rules and set reasonable requirements for its functions. 

  
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 Section 13.07.    No Personal Liability of
Directors, Officers, Employees and Stockholders. No director, officer, employee, incorporator or stockholder of the Company or any Guarantor, as such, will have any liability for any obligations of the Company or the
Guarantors under the Notes, this Supplemental Indenture, the Note Guarantees or for any claim based on, in respect of, or by reason of, such obligations or their creation. Each Holder of Notes by accepting a Note waives and releases all such
liability. The waiver and release are part of the consideration for issuance of the Notes. The waiver may not be effective to waive liabilities under the federal securities laws. 

Section 13.08.    Governing Law. THE INTERNAL LAW OF THE STATE OF NEW YORK WILL GOVERN AND BE USED TO CONSTRUE
THIS SUPPLEMENTAL INDENTURE, THE NOTES AND THE NOTE GUARANTEES WITHOUT GIVING EFFECT TO APPLICABLE PRINCIPLES OF CONFLICTS OF LAW TO THE EXTENT THAT THE APPLICATION OF THE LAWS OF ANOTHER JURISDICTION WOULD BE REQUIRED THEREBY. 

Section 13.09.    No Adverse Interpretation of Other Agreements. This Supplemental Indenture may not be used
to interpret any other indenture, loan or debt agreement of the Company or its Subsidiaries or of any other Person. Any such indenture, loan or debt agreement may not be used to interpret this Supplemental Indenture. 

Section 13.10.    Successors. All agreements of the Company in this Supplemental Indenture and the Notes will
bind its successors. All agreements of the Trustee in this Supplemental Indenture will bind its successors. All agreements of each Guarantor in this Supplemental Indenture will bind its successors, except as otherwise provided in Section 10.05
hereof. 
 Section 13.11.    Severability. In case any provision in this Supplemental Indenture or in the
Notes is invalid, illegal or unenforceable, the validity, legality and enforceability of the remaining provisions will not in any way be affected or impaired thereby. 

Section 13.12.    Counterpart Originals. The parties may sign any number of copies of this Supplemental
Indenture. Each signed copy will be an original, but all of them together represent the same agreement. 

Section 13.13.    Table of Contents, Headings, etc. The Table of Contents,
Cross-Reference Table and Headings of the Articles and Sections of this Supplemental Indenture have been inserted for convenience of reference only, are not to be considered a part of this Supplemental Indenture and will in no way modify or restrict
any of the terms or provisions hereof. 
 Section 13.14.    Waiver of Jury Trial. EACH OF THE COMPANY, EACH
GUARANTOR, THE HOLDERS AND THE TRUSTEE HEREBY IRREVOCABLY WAIVES, TO THE FULLEST EXTENT PERMITTED BY APPLICABLE LAW, ANY AND ALL RIGHT TO TRIAL BY JURY IN ANY LEGAL PROCEEDING ARISING OUT OF OR RELATING TO THIS SUPPLEMENTAL INDENTURE, THE NOTES OR
THE TRANSACTION CONTEMPLATED HEREBY. 

  
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 Section 13.15.    Force Majeure. In no event shall the
Trustee be responsible or liable for any failure or delay in the performance of its obligations hereunder arising out of or caused by, directly or indirectly, forces beyond its control, including, without limitation, strikes, work stoppages,
accidents, acts of war or terrorism, civil or military disturbances, nuclear or natural catastrophes or acts of God, and interruptions, loss or malfunctions of utilities, communications or computer (software and hardware) services; it being
understood that the Trustee shall use reasonable efforts which are consistent with accepted practices in the banking industry to resume performance as soon as practicable under the circumstances. 

Section 13.16    Submission to Jurisdiction. The Company and each Guarantor hereby irrevocably submits to the
jurisdiction of any New York State court sitting in the Borough of Manhattan in the City of New York or any federal court sitting in the Southern District in the Borough of Manhattan in the City of New York in respect of any suit, action or
proceeding arising out of or relating to this Supplemental Indenture, the Guarantees and the Notes, and irrevocably accepts for itself and in respect of its property, generally and unconditionally, jurisdiction of the aforesaid courts. 

Section 13.17    Foreign Account Tax Compliance Act (FATCA). In order to comply with applicable tax laws,
rules and regulations (inclusive of directives, guidelines and interpretations promulgated by competent authorities) in effect from time to time (“Applicable Law”), the Company agrees (i) to provide to The Bank of New York Mellon
Trust Company, N.A. sufficient information about holders or other applicable parties and/or transactions (including any modification to the terms of such transactions) so The Bank of New York Mellon Trust Company, N.A. can determine whether it has
tax related obligations under Applicable Law, (ii) that The Bank of New York Mellon Trust Company, N.A. shall be entitled to make any withholding or deduction from payments under the Indenture to the extent necessary to comply with Applicable
Law for which The Bank of New York Mellon Trust Company, N.A. shall not have any liability, and (iii) to hold harmless The Bank of New York Mellon Trust Company, N.A. for any losses it may suffer due to the actions it takes to comply with such
Applicable Law. The terms of this section shall survive the termination of the Indenture. 
 [Signatures on following pages] 

  
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 SIGNATURES 

Dated as of February 19, 2020 
  

			
	HECLA MINING COMPANY
		
	By:	 	 /s/ Phillips S. Baker, Jr.

		 	Phillips S. Baker, Jr.
		 	President & CEO
	
	HECLA ADMIRALTY COMPANY, as a Guarantor
		
	By:	 	 /s/ Lauren M. Roberts

		 	Lauren M. Roberts
		 	President
	
	HECLA LIMITED, as a Guarantor
		
	By:	 	 /s/ Lauren M. Roberts

		 	Lauren M. Roberts
		 	President
	
	HECLA SILVER VALLEY, INC., as a Guarantor
		
	By:	 	 /s/ Lauren M. Roberts

		 	Lauren M. Roberts
		 	President



  
 [Signature Page to the
Supplemental Indenture] 













 
			
	HECLA MC SUBSIDIARY, LLC, as a Guarantor
		
	By:	 	 /s/ Daniel A. Nelson

		 	Daniel A. Nelson
		 	President
	
	RIO GRANDE SILVER, INC., as a Guarantor
		
	By:	 	 /s/ Lauren M. Roberts

		 	Lauren M. Roberts
		 	President
	
	SILVER HUNTER MINING COMPANY, as a Guarantor
		
	By:	 	 /s/ Lauren M. Roberts

		 	Lauren M. Roberts
		 	President
	
	HECLA ALASKA LLC, as a Guarantor
		
	By:	 	 /s/ Lauren M. Roberts

		 	Lauren M. Roberts
		 	Manager
	
	HECLA GREENS CREEK MINING COMPANY, as a Guarantor
		
	By:	 	 /s/ Lauren M. Roberts

		 	Lauren M. Roberts
		 	Vice President



  
 [Signature Page to the
Supplemental Indenture] 













 
			
	HECLA JUNEAU MINING COMPANY, as a Guarantor
		
	By:	 	 /s/ Lauren M. Roberts

		 	Lauren M. Roberts
		 	Vice President
	
	BURKE TRADING, INC., as a Guarantor
		
	By:	 	 /s/ Lauren M. Roberts

		 	Lauren M. Roberts
		 	President
	
	MINES MANAGEMENT, INC., as a Guarantor
		
	By:	 	 /s/ Kurt Allen

		 	Kurt Allen
		 	President
	
	NEWHI, INC., as a Guarantor
		
	By:	 	 /s/ Kurt Allen

		 	Kurt Allen
		 	President
	
	MONTANORE MINERALS CORP., as a Guarantor
		
	By:	 	 /s/ Kurt Allen

		 	Kurt Allen
		 	President



  
 [Signature Page to the
Supplemental Indenture] 













 
			
	HECLA MONTANA, INC., as a Guarantor
		
	By:	 	 /s/ Luther J. Russell

		 	Luther J. Russell
		 	President
	
	REVETT SILVER COMPANY, as a Guarantor
		
	By:	 	 /s/ Luther J. Russell

		 	Luther J. Russell
		 	President & CEO
	
	TROY MINE INC., as a Guarantor
		
	By:	 	 /s/ Luther J. Russell

		 	Luther J. Russell
		 	President
	
	RC RESOURCES, INC., as a Guarantor
		
	By:	 	 /s/ Luther J. Russell

		 	Luther J. Russell
		 	President
	
	REVETT EXPLORATION, INC., as a Guarantor
		
	By:	 	 /s/ Luther J. Russell

		 	Luther J. Russell
		 	President



  
 [Signature Page to the
Supplemental Indenture] 













 
			
	REVETT HOLDINGS, INC., as a Guarantor
		
	By:	 	 /s/ Luther J. Russell

		 	Luther J. Russell
		 	President
	
	KLONDEX HOLDINGS (USA) INC., as a Guarantor
		
	By:	 	 /s/ Lauren M. Roberts

		 	Lauren M. Roberts
		 	President
	
	KLONDEX GOLD & SILVER MINING COMPANY, as a Guarantor
		
	By:	 	 /s/ Lauren M. Roberts

		 	Lauren M. Roberts
		 	President
	
	KLONDEX MIDAS HOLDINGS LIMITED, as a Guarantor
		
	By:	 	 /s/ Lauren M. Roberts

		 	Lauren M. Roberts
		 	President



  
 [Signature Page to the
Supplemental Indenture] 













 
			
	KLONDEX MIDAS OPERATIONS INC., as a Guarantor
		
	By:	 	 /s/ Lauren M. Roberts

		 	Lauren M. Roberts
		 	President
	
	KLONDEX AURORA MINE INC., as a Guarantor
		
	By:	 	 /s/ Lauren M. Roberts

		 	Lauren M. Roberts
		 	President
	
	KLONDEX HOLLISTER MINE INC., as a Guarantor
		
	By:	 	 /s/ Lauren M. Roberts

		 	Lauren M. Roberts
		 	President
	
	HECLA QUEBEC INC., as a Guarantor
		
	By:	 	 /s/ Lauren M. Roberts

		 	Lauren M. Roberts
		 	President
	
	THE BANK OF NEW YORK MELLON TRUST COMPANY, N.A., as Trustee
		
	By:	 	 /s/ Robert W. Hardy

		 	Robert W. Hardy
		 	Vice President



  
 [Signature Page to the
Supplemental Indenture] 













 EXHIBIT A 

[Insert the Global Note Legend, if applicable pursuant to the provisions of the Supplemental Indenture] 

[Face of Note] 
 CUSIP/ISIN 

7.250% Senior Notes due 2028 
 No.
                $             

HECLA MINING COMPANY 
 promises to pay to
                 or registered assigns, the principal sum of
                     on February 15, 2028. 

Interest Payment Dates: February 15 and August 15 

Record Dates: February 1 and August 1 
 Dated: 

 

			
	HECLA MINING COMPANY


 
			
		
	By:	 	  

	Name:	 	
	Title:	 	


 This is one of the Notes referred to in the within-mentioned Indenture: 

THE BANK OF NEW YORK MELLON TRUST COMPANY, N.A., as Trustee 
  

			
	 By:
	 	  

		 	Authorized Signatory


			
		
	 Dated:
	 	                            













 [Back of Note] 

7.250% Senior Notes due 2028 

Capitalized terms used herein have the meanings assigned to them in the Indenture referred to below unless otherwise indicated. 

(1)    INTEREST. Hecla Mining Company, a Delaware corporation (the “Company”), promises to pay or
cause to be paid interest on the principal amount of this Note at 7.250% per annum from February 19, 2020 until maturity. The Company will pay interest semi-annually in arrears on February 15 and August 15 of each year, or if any such
day is not a Business Day, on the next succeeding Business Day (each, an “Interest Payment Date”). Interest on the Notes will accrue from the most recent date to which interest has been paid or, if no interest has been paid, from
the date of issuance; provided that, if this Note is authenticated between a record date referred to on the face hereof and the next succeeding Interest Payment Date, interest shall accrue from such next succeeding Interest Payment Date;
provided further that the first Interest Payment Date shall be August 15, 2020. The Company will pay interest (including post-petition interest in any proceeding under any Bankruptcy Law) on overdue principal at a rate that is 1% higher
than the then applicable interest rate on the Notes to the extent lawful; it will pay interest (including post-petition interest in any proceeding under any Bankruptcy Law) on overdue installments of interest (without regard to any applicable grace
period), at the same rate to the extent lawful. 
 Interest will be computed on the basis of a
360-day year comprised of twelve 30-day months. 

(2)    METHOD OF PAYMENT. The Company will pay interest on the Notes (except defaulted interest) to the Persons who
are registered Holders of Notes at the close of business on the February 1 or August 1 next preceding the Interest Payment Date, even if such Notes are canceled after such record date and on or before such Interest Payment Date, except as
provided in Section 2.12 of the First Supplemental Indenture with respect to defaulted interest. The Notes will be payable as to principal, premium, if any, interest at the office or agency of the Paying Agent and Registrar, or, at the option
of the Company, payment of interest may be made by check mailed to the Holders at their addresses set forth in the register of Holders; provided that payment by wire transfer of immediately available funds will be required with respect to
principal of, premium on, if any, interest on, all Global Notes and all other Notes the Holders of which will have provided wire transfer instructions to the Company or the Paying Agent. Such payment will be in such coin or currency of the United
States of America as at the time of payment is legal tender for payment of public and private debts. 
 (3)    PAYING
AGENT AND REGISTRAR. Initially, The Bank of New York Mellon Trust Company, N.A., the Trustee under the Indenture, will act as Paying Agent and Registrar. The Company may change the Paying Agent or Registrar without prior notice to the Holders of
the Notes. The Company or any of its Subsidiaries may act as Paying Agent or Registrar. 












 (4)    INDENTURE. The Company issued the Notes under an
Indenture, dated as of February 19, 2020 (the “Base Indenture”), between the Company and the Trustee, as supplemented by the First Supplemental Indenture, dated as of February 19, 2020 (the “Supplemental
Indenture” and, together with the Base Indenture the “Indenture”) among the Company, the Guarantors and the Trustee. The terms of the Notes include those stated in the Indenture and those made part of the Indenture by
reference to the TIA. The Notes are subject to all such terms, and Holders are referred to the Indenture and the TIA for a statement of such terms. To the extent any provision of this Note conflicts with the express provisions of the Indenture, the
provisions of the Indenture shall govern and be controlling. The Notes are unsecured obligations of the Company. The Indenture does not limit the aggregate principal amount of Notes that may be issued thereunder. 

(5)    OPTIONAL REDEMPTION. 

(a)    At any time prior to February 15, 2023, the Company may on any one or more occasions redeem up
to 35% of the original aggregate principal amount of Notes issued under the Indenture (calculated after giving effect to any issuance of Additional Notes), upon not less than 15 nor more than 60 days’ notice, at a redemption price equal to
107.250% of the principal amount of the Notes redeemed, plus accrued and unpaid interest to but excluding the date of redemption (subject to the rights of Holders of Notes so called for redemption on or after a record date for the payment of
interest to receive interest on the relevant Interest Payment Date as provided in the Indenture), with an amount of cash no greater than the cash proceeds (net of underwriting discounts and commissions) of all Equity Offerings by the Company since
the Issue Date; provided that: 
 (i)    at least 65% (calculated after giving effect to any
issuance of Additional Notes) of the original aggregate principal amount of Notes issued under the Indenture (excluding Notes held by the Company and its Subsidiaries) remains outstanding immediately after the occurrence of such redemption; and 

(ii)    the redemption occurs within 120 days of the date of the closing of such Equity Offering. 

(b)    At any time prior to February 15, 2023, the Company may on any one or more occasions redeem all
or a part of the Notes, upon not less than 15 nor more than 60 days’ notice, at a redemption price equal to 100% of the principal amount of the Notes redeemed, plus the Applicable Premium (if any) as of, and accrued and unpaid interest to but
excluding the date of redemption, subject to the rights of Holders of Notes so called for redemption on or after a record date for the payment of interest to receive interest due on the relevant Interest Payment Date as provided in the Indenture.

 (c)    Except pursuant to the preceding paragraphs, the Notes will not be redeemable at the
Company’s option prior to February 15, 2023. 












 (d)    On or after February 15, 2023, the Company
may on any one or more occasions redeem all or a part of the Notes, upon not less than 15 nor more than 60 days’ notice, at the redemption prices (expressed as percentages of principal amount) set forth below, plus accrued and unpaid interest
on the Notes redeemed, to but excluding the applicable date of redemption, if redeemed during the twelve-month period beginning on February 15 of the years indicated below, subject to the rights of Holders of Notes so called for redemption on
or after a record date for the payment of interest to receive interest on the relevant Interest Payment Date as provided in the Indenture: 
  

					
	 Year
	  	Percentage	 
	 2023
	  	 	105.438	% 
	 2024
	  	 	103.625	% 
	 2025
	  	 	101.813	% 
	 2026 and thereafter
	  	 	100.000	% 

 Unless the Company defaults in the payment of the redemption price, interest will cease to accrue on the Notes
or portions thereof called for redemption on the applicable redemption date. 
 (6)    MANDATORY REDEMPTION. The
Company is not required to make mandatory redemption or sinking fund payments with respect to the Notes. 

(7)    REPURCHASE AT THE OPTION OF HOLDER. 

(a)    Upon the occurrence of a Change of Control, the Company will be required to make an offer (a
“Change of Control Offer”) to each Holder to repurchase all or any part (equal to $2,000 or an integral multiple of $1,000 in excess thereof) of that Holder’s Notes at a purchase price in cash equal to 101% of the aggregate
principal amount of Notes repurchased, plus accrued and unpaid interest on the Notes repurchased to the date of purchase, subject to the rights of Holders of Notes on the relevant record date to receive interest due on the relevant interest payment
date (the “Change of Control Payment”). Within 30 days following any Change of Control, the Company will mail a notice to each Holder setting forth the procedures governing the Change of Control Offer as required by the Indenture.

 (b)    If the Company or a Restricted Subsidiary of the Company consummates any Asset Sales, within
five Business Days of each date on which the aggregate amount of Excess Proceeds exceeds $50.0 million, the Company will make an Asset Sale Offer to all Holders of Notes and all holders of other Indebtedness that is (i) pari passu
with the Notes and (ii) contemporaneously require the purchase, prepayment or redemption of such Indebtedness with the proceeds of sales of assets, in accordance with the Indenture to purchase, prepay or redeem the maximum principal amount of
Notes and such other pari passu Indebtedness (plus all accrued interest on the Indebtedness and the amount of all fees and expenses, including premiums, incurred in connection therewith) that may be purchased, prepaid or redeemed out of the
Excess Proceeds. The Excess Proceeds shall be allocated between the Notes and the other pari passu Indebtedness referred to above on a pro rata basis based on the aggregate amount of such Indebtedness then outstanding. The offer price with
respect to the Notes in any Asset Sale Offer will be equal to 100% of the principal amount, plus accrued and unpaid interest to the date of purchase, 












 
prepayment or redemption, subject to the rights of Holders of Notes on the relevant record date to receive interest due on the relevant interest payment date, and will be payable in cash. If any
Excess Proceeds remain after consummation of an Asset Sale Offer and the contemporaneous offer with respect to any other pari passu Indebtedness contemplated above, the Company may use those Excess Proceeds for any purpose not otherwise
prohibited by the Indenture. If the aggregate principal amount of Notes tendered in such Asset Sale Offer exceeds the amount of Excess Proceeds allocable to the Notes, the Trustee will select the Notes to be purchased on a pro rata basis (or,
in the case of Notes issued in global form, in accordance with the applicable procedures of DTC). The remainder of the Excess Proceeds allocable to the other pari passu Indebtedness will be repurchased in a similar manner. Upon completion of
each Asset Sale Offer, the amount of Excess Proceeds will be reset at zero. Holders of Notes that are the subject of an offer to purchase will receive an Asset Sale Offer from the Company prior to any related purchase date and may elect to have such
Notes purchased by completing the form entitled “Option of Holder to Elect Purchase” attached to the Notes. 

(8)    NOTICE OF REDEMPTION. At least 15 days but not more than 60 days before a redemption date, the Company will
mail or cause to be mailed, by first class mail (or, in the case of Notes issued in global form, electronic transmission), a notice of redemption to each Holder whose Notes are to be redeemed at its registered address, except that redemption notices
may be mailed (or electronically transmitted to DTC) more than 60 days prior to a redemption date if the notice is issued in connection with a defeasance of the Notes or a satisfaction and discharge of the Supplemental Indenture pursuant to Articles
8 or 11 thereof. Notes and portions of Notes selected will be in amounts of $2,000 or whole multiples of $1,000 in excess thereof; except that if all of the Notes of a Holder are to be redeemed or purchased, the entire outstanding amount of Notes
held by such Holder shall be redeemed or purchased. 
 (9)    DENOMINATIONS, TRANSFER, EXCHANGE.
The Notes are in registered form in denominations of $2,000 and integral multiples of $1,000 in excess thereof. The transfer of Notes may be registered and Notes may be exchanged as provided in the Indenture. The Registrar and the Trustee may
require a Holder, among other things, to furnish appropriate endorsements and transfer documents and the Company may require a Holder to pay any taxes and fees required by law or permitted by the Indenture. The Company need not exchange or register
the transfer of any Note or portion of a Note selected for redemption, except for the unredeemed portion of any Note being redeemed in part. Also, the Company need not exchange or register the transfer of any Notes for a period of 15 days before a
selection of Notes to be redeemed or during the period between a record date and the next succeeding Interest Payment Date. 

(10)    PERSONS DEEMED OWNERS. The registered Holder of a Note may be treated as the owner of it for all purposes.
Only registered Holders have rights under the Indenture. 
 (11)    AMENDMENT, SUPPLEMENT AND WAIVER.
Subject to certain exceptions, the Supplemental Indenture, the Notes or the Note Guarantees may be amended or supplemented with the consent of the Holders of at least a majority in aggregate principal amount of the then outstanding Notes including
Additional Notes, if any, voting as a single class, and any existing Default or Event of Default or compliance with any provision of the Supplemental Indenture or 












 
the Notes or the Note Guarantees may be waived with the consent of the Holders of a majority in aggregate principal amount of the then outstanding Notes including Additional Notes, if any, voting
as a single class. Without the consent of any Holder of Notes, the Supplemental Indenture, the Notes or the Note Guarantees may be amended or supplemented to cure any ambiguity, omission, defect or inconsistency, to provide for the assumption of the
Company’s or a Guarantor’s obligations to Holders of the Notes and Note Guarantees by a successor to the Company or such Guarantor pursuant to the Supplemental Indenture, to make any change that would provide any additional rights or
benefits to the Holders of the Notes or that does not materially adversely affect the legal rights under the Indenture of any Holder, to comply with the requirements of the SEC in order to effect or maintain the qualification of the Indenture under
the TIA, to conform the text of the Indenture, the Notes, or the Note Guarantees to any provision of the “Description of the Notes” or “Description of Debt Securities” sections of the Company’s Prospectus, to the extent that
such provisions in such sections were intended to be a verbatim recitation of a provision of the Indenture, the Notes, or the Note Guarantees, which intent may be evidenced by an Officer’s Certificate to that effect, to provide for the issuance
of Additional Notes in accordance with the limitations set forth in the Indenture, to allow any Guarantor to execute a supplemental indenture to the Indenture and/or a Note Guarantee with respect to the Notes, or to make any other change that does
not adversely affect the rights of any Holder of the Notes. 
 (12)    DEFAULTS AND REMEDIES. Events of Default
include: (i) default for 30 consecutive days in the payment when due of interest on, the Notes; (ii) default in the payment when due (at maturity, upon redemption or otherwise) of the principal of, or premium on, if any, the Notes,
(iii) failure by the Company or any of its Restricted Subsidiaries to comply with the provisions of Section 5.01 of the Supplemental Indenture; (iv) failure by the Company or any of its Restricted Subsidiaries for 30 days after notice
to the Company by the Trustee or the Holders of at least 25% in aggregate principal amount of the Notes then outstanding voting as a single class to comply with the provisions of Sections 4.07, 4.09, 4.10 or 4.15 of the Supplemental Indenture;
(v) failure by the Company or any of its Restricted Subsidiaries for 60 days after notice to the Company by the Trustee or the Holders of at least 25% in aggregate principal amount of the Notes then outstanding voting as a single class to
comply with any of the other agreements in the Supplemental Indenture; (vi) default under certain other agreements relating to Indebtedness of the Company which default is a Payment Default or results in the acceleration of such Indebtedness
prior to its express maturity; (vii) failure by the Company or any Significant Subsidiary or any group of its Restricted Subsidiaries that, taken together (as of the date of the latest audited consolidated financial statements of the Company
and its Restricted Subsidiaries), would constitute a Significant Subsidiary, to pay final non-appealable judgments entered by a court or courts of competent jurisdiction aggregating in excess of
$50.0 million (net of any amounts covered by insurance policies issued by a reputable and creditworthy insurance company that is not contesting liability for such amounts), which final non-appealable
judgments are not paid, discharged or stayed, for a period of 60 days after such judgment becomes final, and in the event such judgment is covered in full by insurance, an enforcement proceeding has been commenced by any creditor upon such judgment
or decree which is not promptly stayed; (viii) except as permitted by the Supplemental Indenture, any Note Guarantee of a Significant Subsidiary or any group of Guarantors that, taken together (as of the date of the latest audited consolidated
financial statements of the Company and its Restricted Subsidiaries), would constitute a Significant Subsidiary, is held in any final, non-appealable judicial proceeding to be













 
unenforceable or invalid or ceases for any reason to be in full force and effect, or any Guarantor that is a Significant Subsidiary or any group of Guarantors that, taken together (as of the date
of the latest audited consolidated financial statements of the Company and its Restricted Subsidiaries), would constitute a Significant Subsidiary, or any Person acting on behalf of any such Guarantor, denies or disaffirms its obligations under its
Note Guarantee; and (ix) certain events of bankruptcy or insolvency with respect to the Company or any of its Restricted Subsidiaries that is a Significant Subsidiary or any group of Restricted Subsidiaries of the Company that, taken together,
would constitute a Significant Subsidiary. In the case of an Event of Default arising from certain events of bankruptcy or insolvency with respect to the Company, any Restricted Subsidiary of the Company that is a Significant Subsidiary or any group
of Restricted Subsidiaries of the Company that, taken together, would constitute a Significant Subsidiary, all outstanding Notes will become due and payable immediately without further action or notice. If any other Event of Default occurs and is
continuing, the Trustee or the Holders of at least 25% in aggregate principal amount of the then outstanding Notes may declare all the Notes to be due and payable immediately. Holders may not enforce the Indenture or the Notes except as provided in
the Indenture. Subject to certain limitations, Holders of a majority in aggregate principal amount of the then outstanding Notes may direct the time, method and place of conducting any proceeding for exercising any remedy available to the Trustee or
exercising any trust or power conferred on it. The Trustee may withhold from Holders of the Notes notice of any continuing Default or Event of Default (except a Default or Event of Default relating to the payment of principal, premium, if any, or
interest) if it determines that withholding notice is in their interest. The Holders of a majority in aggregate principal amount of the then outstanding Notes by written notice to the Trustee may, on behalf of all of the Holders of all the Notes,
rescind an acceleration or waive an existing Default or Event of Default and its respective consequences under the Indenture except a continuing Default or Event of Default in the payment of principal of, premium on, if any, or interest, on the
Notes (including in connection with an offer to purchase). The Company is required to deliver to the Trustee annually a statement regarding compliance with the Indenture, and the Company is required, upon becoming aware of any Default or Event of
Default, to deliver to the Trustee a statement specifying such Default or Event of Default. 
 (13)    TRUSTEE
DEALINGS WITH COMPANY. The Trustee, in its individual or any other capacity, may make loans to, accept deposits from, and perform services for the Company or its Affiliates, and may otherwise deal with the Company or its Affiliates, as if it
were not the Trustee. 
 (14)    NO RECOURSE AGAINST OTHERS. No director, officer, employee, incorporator or
stockholder of the Company or any Guarantor, as such, will have any liability for any obligations of the Company or the Guarantors under the Notes, the Indenture, the Note Guarantees or for any claim based on, in respect of, or by reason of, such
obligations or their creation. Each Holder of Notes by accepting a Note waives and releases all such liability. The waiver and release are part of the consideration for issuance of the Notes. The waiver may not be effective to waive liabilities
under the federal securities laws. 
 (15)    AUTHENTICATION. This Note will not be valid until authenticated by
the manual signature of the Trustee or an authenticating agent. 












 (16)    ABBREVIATIONS. Customary abbreviations may be used in the
name of a Holder or an assignee, such as: TEN COM (= tenants in common), TEN ENT (= tenants by the entireties), JT TEN (= joint tenants with right of survivorship and not as tenants in common), CUST (= Custodian), and U/G/M/A (= Uniform Gifts to
Minors Act). 
 (17)    CUSIP NUMBERS. Pursuant to a recommendation promulgated by the Committee on Uniform
Security Identification Procedures, the Company has caused CUSIP numbers to be printed on the Notes, and the Trustee may use CUSIP numbers in notices of redemption as a convenience to Holders. No representation is made as to the accuracy of such
numbers either as printed on the Notes or as contained in any notice of redemption, and reliance may be placed only on the other identification numbers placed thereon. 

(18)    GOVERNING LAW. THE INTERNAL LAW OF THE STATE OF NEW YORK WILL GOVERN AND BE USED TO CONSTRUE THE INDENTURE,
THIS NOTE AND THE NOTE GUARANTEES WITHOUT GIVING EFFECT TO APPLICABLE PRINCIPLES OF CONFLICTS OF LAW TO THE EXTENT THAT THE APPLICATION OF THE LAWS OF ANOTHER JURISDICTION WOULD BE REQUIRED THEREBY. 

The Company will furnish to any Holder upon written request and without charge a copy of the Indenture. Requests may be made to: 

Hecla Mining Company 
 6500 N. Mineral Drive, Suite 200 

Coeur d’Alene, Idaho 
 Facsimile: (208) 209-1278 
 Attention: David Sienko 












 ASSIGNMENT FORM 

To assign this Note, fill in the form below: 

(I) or (we) assign and transfer this Note to:     

 

	
	  
 (Insert assignee’s legal
name)



  
  

(Insert assignee’s soc. sec. or tax I. D. No. ) 
  

 
 (Print or type assignee’s name, address and
zip code) 
 and irrevocably appoint
                                         
                        to transfer this Note on the books of the Company. The agent may substitute another to act for him. 

Date: 
  

			
	Your Signature:	 	  

		 	(Sign exactly as your name appears on the face of this Note)


 Signature Guarantee*: 
  

	*	 Participant in a recognized Signature Guarantee Medallion Program (or other signature guarantor acceptable to
the Trustee). 














 OPTION OF HOLDER TO ELECT PURCHASE 

If you want to elect to have this Note purchased by the Company pursuant to Section 4.10 or Section 4.15 of the Indenture, check the
appropriate box below: 
  

							
	☐	  	    Section 4.10	  	☐	  	    Section 4.15

 If you want to elect to have only part of the Note purchased by the Company pursuant to Section 4.10 or
Section 4.15 of the Indenture, state the amount you elect to have purchased: 

$                    
               

Date:                         
         
  

			
	Your Signature:	 	  

		 	(Sign exactly as your name appears on
the face of this Note)


  

			
	Tax Identification No.:	 	  



 Signature Guarantee*: 
  

	*	 Participant in a recognized Signature Guarantee Medallion Program (or other signature guarantor acceptable to
the Trustee). 














 SCHEDULE OF EXCHANGES OF INTERESTS IN THE GLOBAL NOTE * 

The following exchanges of a part of this Global Note for an interest in another Global Note or for a Definitive Note, or exchanges of a part
of another Global Note or Definitive Note for an interest in this Global Note, have been made: 
  

									
	 Date of

    Exchange    
	 	 Amount of

decrease in
 Principal

    Amount of this    

    Global Note
	 	 Amount of

increase in
 Principal

    Amount of this    

    Global Note    
	 	 Principal

    Amount of this    

Global Note
 following such

decrease (or

    increase)    
	 	 Signature of

authorized officer of

    Trustee or Custodian    

		 		 		 		 	
		 		 		 		 	
		 		 		 		 	

  

	*	 This schedule should be included only if the Note is issued in global form. 














 EXHIBIT B 

FORM OF NOTATION OF GUARANTEE 

For value received, each Guarantor (which term includes any successor Person under the Indenture, dated as of February 19, 2020 (the
“Base Indenture”) between Hecla Mining Company (the “Company”) and The Bank of New York Mellon Trust Company, N.A., as trustee (the “Trustee”), has, jointly and severally, unconditionally
guaranteed, to the extent set forth in the Base Indenture and subject to the provisions in the First Supplemental Indenture, dated as of February 19, 2020 (the “Supplemental Indenture” and, together with the Base Indenture, the
“Indenture”) among the Company, the Guarantors party thereto and the Trustee, (a) the due and punctual payment of the principal of, premium on, if any, and interest on, the Notes, whether at maturity, by acceleration,
redemption or otherwise, the due and punctual payment of interest on overdue principal of, premium on, if any, and interest on, the Notes, if any, if lawful, and the due and punctual performance of all other obligations of the Company to the Holders
or the Trustee all in accordance with the terms of the Indenture and (b) in case of any extension of time of payment or renewal of any Notes or any of such other obligations, that the same will be promptly paid in full when due or performed in
accordance with the terms of the extension or renewal, whether at stated maturity, by acceleration or otherwise. The obligations of the Guarantors to the Holders of Notes and to the Trustee pursuant to the Note Guarantee and the Supplemental
Indenture are expressly set forth in Article 10 of the Supplemental Indenture and reference is hereby made to the Indenture for the precise terms of the Note Guarantee. 

Capitalized terms used but not defined herein have the meanings given to them in the Indenture. 

 

			
	[NAME OF GUARANTOR(S)]


 
			
		
	By:	 	  

	Name:	 	
	Title:	 	














 EXHIBIT C 

FORM OF SUPPLEMENTAL INDENTURE 

TO BE DELIVERED BY SUBSEQUENT GUARANTORS 

SUPPLEMENTAL INDENTURE (this “Joining Supplemental Indenture”), dated as of
                    , among
                             (the “Guaranteeing Subsidiary”), a subsidiary of Hecla Mining
Company (or its permitted successor), a Delaware corporation (the “Company”), the other Guarantors (as defined in the Indenture referred to herein) and The Bank of New York Mellon Trust Company, N.A., as trustee under the Indenture
referred to below (the “Trustee”). 
 W I T N E S S E T H 

WHEREAS, reference is hereby made to the Indenture, dated as of February 19, 2020 (the “Base Indenture”), between the
Company and the Trustee, as supplemented by the First Supplemental Indenture, dated as of February 19, 2020 (the “First Supplemental Indenture” and, together with the Base Indenture, the “Indenture”), providing
for the issuance of the Company’s 7.250% Senior Notes due 2028 (the “Notes”); 
 WHEREAS, the Indenture provides that
under certain circumstances the Guaranteeing Subsidiary shall execute and deliver to the Trustee a supplemental indenture pursuant to which the Guaranteeing Subsidiary shall unconditionally guarantee all of the Company’s Obligations under the
Notes and the Indenture on the terms and conditions set forth herein (the “Note Guarantee”); and 
 WHEREAS, pursuant to
Section 10.01 of the Base Indenture and Section 4.18 of the First Supplemental Indenture, the Trustee is authorized to execute and deliver this Joining Supplemental Indenture. 

NOW, THEREFORE, in consideration of the foregoing and for other good and valuable consideration, the receipt of which is hereby acknowledged,
the Guaranteeing Subsidiary and the Trustee mutually covenant and agree for the equal and ratable benefit of the Holders of the Notes as follows: 

1.    CAPITALIZED TERMS. Capitalized terms used herein without definition shall have the meanings assigned to them in the
Indenture. 
 2.    AGREEMENT TO GUARANTEE. The Guaranteeing Subsidiary hereby agrees to provide an unconditional
Guarantee on the terms and subject to the conditions set forth in the Note Guarantee and in the First Supplemental Indenture including but not limited to Article 10 thereof. 

3.    NO RECOURSE AGAINST OTHERS. No director, officer, employee, incorporator or stockholder of the Company or any
Guarantor, as such, will have any liability for any obligations of the Company or the Guarantors under the Notes, this Supplemental Indenture, the Note Guarantees or for any claim based on, in respect of, or by reason of, such obligations or their
creation. Each Holder of Notes by accepting a Note waives and releases all such liability. 












 
The waiver and release are part of the consideration for issuance of the Notes. The waiver may not be effective to waive liabilities under the federal securities laws. 

4.    NEW YORK LAW TO GOVERN. THE INTERNAL LAW OF THE STATE OF NEW YORK SHALL GOVERN AND BE USED TO CONSTRUE THIS
SUPPLEMENTAL INDENTURE WITHOUT GIVING EFFECT TO APPLICABLE PRINCIPLES OF CONFLICTS OF LAW TO THE EXTENT THAT THE APPLICATION OF THE LAWS OF ANOTHER JURISDICTION WOULD BE REQUIRED THEREBY. 

5.    COUNTERPARTS. The parties may sign any number of copies of this Joining Supplemental Indenture. Each signed copy
shall be an original, but all of them together represent the same agreement. 
 6.    EFFECT OF HEADINGS. The Section
headings herein are for convenience only and shall not affect the construction hereof. 
 7.    THE TRUSTEE. The Trustee
shall not be responsible in any manner whatsoever for or in respect of the validity or sufficiency of this Joining Supplemental Indenture or for or in respect of the recitals contained herein, all of which recitals are made solely by the
Guaranteeing Subsidiary and the Company. 
 IN WITNESS WHEREOF, the parties hereto have caused this Joining Supplemental Indenture to be
duly executed and attested, all as of the date first above written. 
 Dated:       

 

			
	[GUARANTEEING SUBSIDIARY]


 
			
		
	By:	 	  

	Name:	 	
	Title:	 	


 
			
	
	HECLA MINING COMPANY


 
			
	By:	 	  

	Name:	 	
	Title:	 	














 
			
	[EXISTING GUARANTORS]


 
			
		
	By:	 	  

	Name:	 	
	Title:	 	


 
			
	
	THE BANK OF NEW YORK MELLON TRUST COMPANY, N.A.,
as Trustee


 
			
	By:	 	  

	Name:	 	
	Title: