Registration No. 333-            [●]

UNITED STATES

SECURITIES AND EXCHANGE COMMISSION

Washington, D.C. 20549

FORM S-4

REGISTRATION STATEMENT

UNDER

THE SECURITIES ACT OF 1933

HECLA MINING COMPANY

(Exact Name of Registrant as Specified in its Charter)

6500 North Mineral Drive, Suite 200

Coeur d’Alene, Idaho 83815-9408

(208) 769-4100

(Address, including zip code, and telephone number, including area code, of Registrant’s principal executive offices)

David C. Sienko, Esq.

General Counsel

Hecla Mining Company

6500 North Mineral Drive, Suite 200

Coeur d’Alene, Idaho 83815-9408

(208) 769-4100

(Name, address, including zip code, and telephone number, including area code, of agent for service)

with copies to:

Approximate date of commencement of proposed sale to the public: As soon as practicable after the effective date of this registration statement and upon completion of the merger described in the enclosed proxy statement/prospectus.

If the securities being registered on this Form are being offered in connection with the formation of a holding company and there is compliance with General Instruction G, check the following box.  ¨

If this Form is filed to register additional securities for an offering pursuant to Rule 462(b) under the Securities Act, please check the following box and list the Securities Act registration statement number of the earlier effective registration statement for the same offering.  ¨

If this Form is a post–post—effective amendment filed pursuant to Rule 462(d) under the Securities Act, check the following box and list the Securities Act registration statement number of the earlier effective registration statement for the same offering.  ¨

Indicate by check mark whether the registrant is a large accelerated filer, an accelerated filer, a non-accelerated filer, or a smaller reporting company. See the definitions of “large accelerated filer”, “accelerated filer” and “smaller reporting company” in Rule 12b-2 of the Exchange Act.

If applicable, place an X in the box to designate the appropriate rule provision relied upon in conducting this transaction:

Exchange Act Rule 13e-4(i) (Cross-Border Issuer Tender Offer)  ¨

Exchange Act Rule 14d-1(d) (Cross-Border Third-Party Tender Offer)  ¨

CALCULATION OF REGISTRATION FEE

The registrant hereby amends this registration statement on such date or dates as may be necessary to delay its effective date until the registrant shall file a further amendment which specifically states that this registration statement shall thereafter become effective in accordance with Section 8(a) of the Securities Act of 1933 or until the registration statement shall become effective on such date as the Commission, acting pursuant to said Section 8(a), may determine.

Information contained herein is subject to completion or amendment. A registration statement relating to these securities has been filed with the Securities and Exchange Commission. We may not sell these securities pursuant to this prospectus until the registration statement filed with the Securities and Exchange Commission becomes effective. This proxy statement/prospectus is not an offer to sell these securities, and we are not soliciting offers to buy these securities, in any state where the offer or sale is not permitted.

Subject to Completion, dated April 20, 2015June 29, 2016

MERGER PROPOSAL—YOUR VOTE IS VERY IMPORTANT

Revett Mining Company,

Mines Management, Inc., a Delawarean Idaho corporation (“Revett”Mines Management”), Hecla Mining Company, a Delaware corporation (“Hecla”), and RHL Holdings, Inc.HL Idaho Corp., a Delawarean Idaho corporation and a wholly-owned subsidiary of Hecla (“Merger Sub”), have entered into an Agreement and Plan of Merger, dated as of March 26, 2015May 23, 2016, as amended on June 29, 2016 (as amended and as it may be further amended from time to time, the “merger agreement”) pursuant to which Merger Sub will merge with and into RevettMines Management with RevettMines Management surviving the merger as a wholly-owned subsidiary of Hecla (the “merger”).

If the merger is completed, RevettMines Management stockholders will have the right to receive 0.16220.2218 of a share of Hecla common stock for each share of RevettMines Management common stock. Any stockholders entitled to receive a fractional share of Hecla common stock withshall receive cash paid in lieu of such fractional shares.share. This exchange ratio is fixed and will not be adjusted to reflect stock price changes prior to the closing of the merger.

Based on the estimated number of shares of RevettMines Management common stock outstanding on the record date for the special meeting of RevettMines Management stockholders, Hecla expects to issue approximately 6,252,6469,139,078 shares of Hecla common stock to RevettMines Management stockholders in the merger. Upon completion of the transaction, it is projected that holders of RevettMines Management common stock will own approximately 1.66%2.37% of Hecla’s outstanding common stock, while existing stockholders of Hecla will continue to own the remaining 98.34%97.63%. RevettMines Management common stock is currently listed for trading on the NYSE MKT LLC under the symbol “MGN” and the Toronto Stock Exchange under the symbol “RVM”.“MGT.” Following completion of the merger, Hecla common stock will continue to trade on the NYSE under the symbol “HL” and RevettMines Management common stock will cease to be listed for trading.

RevettMines Management will hold a special meeting of its stockholders on [    ], 2015August 10, 2016 in conjunction with the proposed merger. Hecla’s stockholders are not required to approve the proposed merger.

At the special meeting of RevettMines Management stockholders, RevettMines Management stockholders will be asked to consider and vote on (i) a proposal to approve and adopt the merger agreement (the “merger proposal”), (ii) a proposal to adjourn the special meeting, if necessary or appropriate, including to solicit additional proxies if there are not sufficient votes to approve and adopt the merger proposal (the “Revett adjournment“adjournment proposal”) and (iii) a non-binding, advisory proposal to approve the compensation that may become payable to Revett’sMines Management’s named executive officers in connection with the merger (the “compensation proposal”). Approval and adoption of the merger proposal, requires the affirmative vote of holders of a majority of the outstanding shares of Revett common stock entitled to vote thereon. Approval of the Revett adjournment proposal and the compensation proposal each requires the affirmative vote of holders of a majority of the sharesvotes cast by holders of RevettMines Management common stock present in person or represented by proxy at the special meeting and entitled to vote on the matter.matter, and a quorum must be present at the special meeting.

RevettMines Management cannot complete the merger unless its stockholders approve and adopt the merger proposal.Your vote is very important, regardless of the number of shares you own. Whether or not you expect to attend the special meeting in person, please submit a proxy as promptly as possible by (1)accessing the Internet website specified on your proxy card, (2)calling the toll-free number specified on your proxy card or (3)marking, signing, dating and returning all proxy cards that you receive in the postage-paid envelope provided, so that your shares may be represented and voted at the special meeting.

After careful consideration, the RevettMines Management board of directors, on March 25, 2015,May 21, 2016, unanimously approved, adopted and declared advisable the merger agreement and the merger, directed that the merger agreement be submitted to the stockholders of RevettMines Management for approval and adoption and determined that the terms of the merger agreement and the merger are fair toadvisable and in the best interests of Revett’sMines Management’s stockholders. The RevettMines Management board of directors accordingly unanimously recommends that the RevettMines Management stockholders vote “FOR” each of the merger proposal, the Revett adjournment proposal and the compensation proposal.

The obligations of RevettMines Management and Hecla to complete the transactions are subject to the satisfaction or waiver of several conditions set forth in the merger agreement. More information about Revett,Mines Management, Hecla and the merger is contained in this proxy statement/prospectus.Revett Mines Managementand Hecla encourage you to read this entire proxy statement/prospectus carefully, including the section entitled “Risk Factors” beginning on page 22,23, as well as the information incorporated herein by reference.

We look forward to the successful completion of the merger.

Sincerely,

Neither the Securities and Exchange Commission nor any state securities commission has approved or disapproved of the securities to be issued under this proxy statement/prospectus or determined that this proxy statement/prospectus is accurate or complete. Any representation to the contrary is a criminal offense.

This proxy statement/prospectus is dated July [    ], 2015●], 2016 and is first being mailed to the stockholders of RevettMines Management on or about July [    ], 2015.●], 2016.

Revett Mining Company,Mines Management, Inc.

11115 East Montgomery,905 West Riverside Avenue, Suite G311

Spokane, Valley, Washington 9920699201

(509) 921-2294838-6050

NOTICE OF SPECIAL MEETING OF STOCKHOLDERS

To Be Held On [    ], 2015be held on August 10, 2016

Dear StockholdersStockholder of Revett Mining Company,Mines Management, Inc.:

We are pleased to invite you to attend the special meeting of stockholders of Revett Mining Company,Mines Management, Inc., a Delawarean Idaho corporation (“Revett”Mines Management”), which will be held at [    ],the Lincoln Building, 811 W. Riverside, 2^nd floor conference room, Spokane, Valley, Washington 99201, on [                    ], 2015,Wednesday, August 10, 2016, at [                    ] a.m.2:00 p.m., local time, for the following purposes:

RevettMines Management will transact no other business at the special meeting except such business as may be brought at the direction of the RevettMines Management board of directors. Please refer to the attached proxy statement/prospectus for further information with respect to the business to be transacted at the special meeting.

The RevettMines Management board of directors has fixed the close of business on [                    ], 2015July 5, 2016 as the record date for determination of RevettMines Management stockholders entitled to receive notice of, and to vote at, the special meeting or any adjournments or postponements thereof. Only stockholders of record of RevettMines Management at the close of business on the record date are entitled to notice of, and to vote at, the special meeting and at any adjournment or postponement of the special meeting. A list of stockholders of record entitled to vote at the special meeting will be available for inspection by stockholders for any purpose germane to the special meeting of Revett at Revett’sMines Management’s executive offices and principal place of business at 11115 East Montgomery,905 West Riverside Avenue, Suite G,311, Spokane, Valley, Washington 9920699201 during ordinary business hours for a period of ten days before the special meeting. The list will also be available at the special meeting for examination by any stockholder of record present at the special meeting.

Approval and adoption of the merger proposal, requires the affirmative vote of holders of a majority of the outstanding shares of Revett common stock entitled to vote thereon. Certain stockholders of Revett holding approximately 14.73% of Revett common stock have entered into shareholder agreements, each dated March 26, 2015, pursuant to which each such stockholder has agreed, among other things, to vote its shares of Revett common stock in favor of the approval of the merger agreement. Approval of the Revett adjournment proposal and the compensation proposal each requires the affirmative vote of holders of a majority of the sharesvotes cast by holders of RevettMines Management common stock present in person or represented by proxy at the special meeting and entitled to vote on the proposal.proposal, and a quorum must be present at the special meeting.Certain stockholders of Mines Management have entered into shareholders agreements, each dated May 23, 2016, pursuant to which each such stockholder has agreed, among other things, to vote its shares of Mines Management common stock in favor of the approval and adoption of the

merger agreement. Shares representing approximately 17.6% of Mines Management common stock (which include 1,472,621 shares of Mines Management common stock subject to currently exercisable options) are subject to the shareholders agreements.

Under Idaho law, holders of Mines Management common stock will not be entitled to dissenters’ or appraisal rights.

Your vote is important. Whether or not you expect to attend in person, we urge you to submit your proxy as promptly as possible by (1)accessing the Internet website specified on your proxy card, (2)calling the toll-free number specified on your proxy card or (3)marking, signing, dating and returning the enclosed

proxy card in the postage-paid envelope provided, so that your shares may be represented and voted at the special meeting. If your shares are held in the name of a broker, bank, trust company or other nominee, please follow the instructions on the voting instruction card furnished to you by such record holder. 

Please note that if you hold shares in different accounts, it is important that you vote the shares represented by each account.

The enclosed proxy statement/prospectus provides a detailed description of the merger and the merger agreement. We urge you to read the proxy statement/prospectus, including any documents incorporated by reference, and the appendices carefully and in their entirety. If you have any questions concerning the merger or the proxy statement/prospectus, would like additional copies, or need help submitting a proxy or voting your shares of Mines Management common stock, please contact Mines Management’s proxy solicitor:

Morrow & Co., LLC

470 West Ave. – 3rd Floor

Stamford, CT 06902

Stockholders call: (877) 787-9239

Banks and Brokers call: (203) 658-9400

By order of the Board of Directors,

John G. Shanahan

Glenn M. Dobbs

President and Chief Executive Officer

July [●], 2016

Spokane, Valley, Washington

[                    ], 2015

ADDITIONAL INFORMATION

This proxy statement/prospectus incorporates by reference important business and financial information about Hecla Mining Company (“Hecla”) from other documents filed with the Securities and Exchange Commission (the “SEC”) that are not included in or delivered with this proxy statement/prospectus. See “Where You Can Find More Information.”

Documents incorporated by reference are available to you without charge upon written or oraltelephonic request. You can obtain any of these documents by requesting them in writing or by telephone from the appropriate party at the following addresses and telephone numbers.

To receive timely delivery of the requested documents in advance of the special meeting, you should make your request no later than [                    ], 2015●], 2016.

ABOUT THIS DOCUMENT

This document, which forms part of a registration statement on Form S-4 filed with the SEC by Hecla (File No. 333-[            ])●]), constitutes a prospectus of Hecla under Section 5 of the Securities Act of 1933, as amended (the “Securities Act”), with respect to the shares of Hecla common stock to be issued pursuant to the Agreement and Plan of Merger, dated as of March 26, 2015,May 23, 2016, by and among Hecla, RHL Holdings, Inc. (“Merger Sub”),Sub and Revett,Mines Management, as the sameamended on June 29, 2016 and as it may be further amended from time to time (the “merger agreement”).time. This document also constitutes a notice of meeting and a proxy statement under Section 14(a) of the Securities Exchange Act of 1934, as amended (the “Exchange Act”), with respect to the special meeting of RevettMines Management stockholders, at which RevettMines Management stockholders will be asked to consider and vote on, among other matters, a proposal to approve and adopt the merger agreement and the transactions contemplated thereby.

You should rely only on the information contained in or incorporated by reference into this proxy statement/prospectus. No one has been authorized to provide you with information that is different from that contained in, or incorporated by reference into, this proxy statement/prospectus. This proxy statement/prospectus is dated [                    ], 2015.July [●], 2016. The information contained in this proxy statement/prospectus is accurate only as of that date or, in the case of information in a document incorporated by reference, as of the date of such document, unless the information specifically indicates that another date applies. Neither the mailing of this proxy statement/prospectus to RevettMines Management stockholders nor the issuance by Hecla of its common stock pursuant to the merger agreement will create any implication to the contrary.

This proxy statement/prospectus does not constitute an offer to sell, or a solicitation of an offer to buy, any securities, or the solicitation of a proxy, in any jurisdiction in which, or from any person to whom, it is unlawful to make any such offer or solicitation in such jurisdiction.

The information concerning Hecla contained in this proxy statement/prospectus or incorporated by reference has been provided by Hecla, and the information concerning RevettMines Management contained in this proxy statement/prospectus or incorporated by reference has been provided by Revett.Mines Management.

Unless otherwise indicated or as the context otherwise requires, all references in this proxy statement/prospectus to:

In addition, unless otherwise indicated or as the context otherwise requires, all references in this proxy statement/prospectus to:

Guide 7 Definitions

Additional Definitions

TABLE OF CONTENTS

Prospectus

i

ii

QUESTIONS AND ANSWERS

Set forth below are questions that you, as a stockholder of Revett,Mines Management, may have regarding the merger, the adjournment proposal, the advisory compensation proposal and the special meeting, and brief answers to those questions. You are urged to read carefully this proxy statement/prospectus and the other documents referred to in this proxy statement/prospectus in their entirety, including the merger agreement, which is attached as Appendix A to this proxy statement/prospectus, and the documents incorporated by reference into this proxy statement/prospectus, because this section may not provide all of the information that is important to you with respect to the merger and the special meeting. You may obtain a list of the documents incorporated by reference into this proxy statement/prospectus in the section titled “Where You Can Find More Information” beginning on page 111.105.

Q: Why am I receiving this proxy statement/prospectus?

A:RevettMines Management and Hecla have agreed to a merger, pursuant to which RevettMines Management will merge with Merger Sub, awholly-owned subsidiary of Hecla (“Merger Sub”). RevettHecla. Mines Management will continue its existence as the surviving entity and become a wholly-owned subsidiary of Hecla, but will cease to be a publicly traded company. This transaction is sometimes referred to throughout this proxy statement/prospectus as the “Merger.“merger.” Please see “Proposal 1: The Approval and Adoption of the Merger Agreement—Effects of the Merger” on page 3739 of this proxy statement/prospectus and “Proposal 1: The Approval and Adoption of the Merger Agreement—The Merger Agreement” on page 5765 of this proxy statement/prospectus. A copy of the merger agreement is attached to this proxy statement/prospectus as Appendix A.

In order to complete the merger, RevettMines Management stockholders must vote to approve and adopt the merger agreement. RevettMines Management is holding a special meeting of its stockholders to obtain such stockholder approval. Revettapproval and adoption. Mines Management stockholders will also be asked to approve, on an advisory (non-binding) basis, the payments that will or may be paid by RevettMines Management to its named executive officers in connection with the merger.

In the merger, Hecla will issue shares of its common stock as the consideration to be paid to holders of RevettMines Management common stock. This document is being delivered to you as both a proxy statement of RevettMines Management and a prospectus of Hecla in connection with the merger. It is the proxy statement by which the board of directors of RevettMines Management is soliciting proxies from you to vote on the approval and adoption of the merger agreement and the transactions contemplated thereby at the special meeting or at any adjournment or postponement of the special meeting. It is also the prospectus by which Hecla is offering the shares of Hecla common stock it will issue to you in the merger.

Q: How does the board of directors of RevettMines Management recommend that its stockholders vote?

A:Revett’sMines Management’s board of directors unanimously approved, adopted and declared advisable the merger agreement and the merger, directed that the merger agreement be submitted to the stockholders of RevettMines Management for approval and adoption and determined that the terms of the merger agreement and the merger are fair toadvisable and in the best interests of Revett’sMines Management’s stockholders. The RevettMines Management board of directors accordingly unanimously recommends that the RevettMines Management stockholders vote “FOR” each of the merger proposal, the Revett adjournment proposal and the compensation proposal, seeproposal. See “Proposal 1: The Approval and Adoption of the Merger Agreement—Recommendation of Revett’sMines Management’s Board of Directors; Revett’sMines Management’s Reasons for the Merger” beginning on page 4246 of this proxy statement/prospectus.

Q: Am I being asked to vote on anything else?

A:Yes. Revett’sMines Management’s board of directors is asking you to consider and vote on the adjournment proposal and the advisory compensation proposal. See “Proposal 2: Possible Adjournment to Solicit Additional Proxies If

Necessary or Appropriate” on page 7281 of this proxy statement/prospectus and “Proposal 3: Advisory (Non-Binding) Vote on Compensation” beginning on page 7382 of this proxy statement/prospectus.

Q: Why are RevettMines Management stockholders being asked to approve, on a non-binding advisory basis, the compensation that may be paid or become payable to Revett’sMines Management’s named executive officers in connection with the completion of the merger?

A: The rules promulgated by the SEC under Section 14A of the Exchange Act require RevettMines Management to seek anon-binding, advisory vote with respect to certain compensation that may be paid or become payable to Revett’sMines Management’s named executive officers in connection with the merger. For more information regarding such payments, see the section entitled “Proposal 3: Advisory (Non-Binding) Vote on Compensation” beginning on page 73.82.

Q: What will RevettMines Management stockholders receive in the transaction?

A:If the transaction is completed, holders of RevettMines Management common stock will be entitled to receive 0.16220.2218 of a share of Hecla common stock for each share of RevettMines Management common stock they hold at the effective time. RevettAny stockholders will notentitled to receive anya fractional sharesshare of Hecla common stock in the merger. Instead, Hecla will payshall receive cash in lieu of anysuch fractional sharesshare. This exchange ratio is fixed and will not be adjusted to reflect stock price changes prior to the closing of Hecla common stock that a Revett stockholder would otherwise have been entitled to receive.the merger. Following the completion of the merger, RevettMines Management common stock will cease to trade on the New York Stock Exchange Market DivisionNYSE MKT LLC (“NYSE MKT”) and the Toronto Stock Exchange (“TSX”).

Q: What will happen to outstanding RevettMines Management options and warrants in the Merger?merger?

A:At the effective time, each option to purchase shares of RevettMines Managementcommon stock that is outstanding immediately prior to the effective time that has an exercise price per share greater than or equal to the product of the closing price of Hecla common stock on the NYSE on the trading day immediately preceding the closing date and 0.2218 will be cancelled without any payment being made in respect thereof. At the effective time, each other option to purchase shares of Mines Management common stock that is outstanding immediately prior to the effective time (whether or not(all of which are vested) that has anwill be cancelled in exchange for the right to receive shares of Hecla common stock (without interest, and subject to deduction for any required withholding tax, with cash being paid in lieu of issuing fractional shares of Hecla common stock) with a value equal to (i)(a) the product of the closing price of Hecla common stock on the NYSE on the trading day immediately preceding the closing date and 0.2218 minus (b) the exercise price per share greater thanunder such option multiplied by (ii) the merger consideration (which isnumber of shares subject to such option. At the caseoption of Hecla, in lieu of paying all or a portion of the amounts due to a holder of options with shares of Hecla common stock, Hecla may substitute for all currently outstanding options) will be cancelled without any payment being madesuch shares an equivalent amount in respect thereof, in accordance with the provisions of that plan.cash.

At the effective time, and in accordance with the terms of eachany warrant to purchase shares of Revett commonMines Managementcommon stock that is outstanding immediately prior to the effective time, Heclasuch warrant will issueeither be cancelled in accordance with its terms or a replacement warrant to each holder thereof that will be exercisable forissued giving the holder the right to purchase a number of shares of Hecla common stock (without interest, and subject to deduction for any required withholding tax, and no issuance of fractional shares and the number of such shares rounded down) equal to the product of (i) 0.16220.2218 and (ii) the number of shares of Revett subjectMines Management common stocksubject to such warrant, with an exercise price of $6.17$4.8765 per share of Hecla common stock, pursuant to and in accordance with such holder’s warrantswarrant (as amended).

Q: What happens if the market price of shares of Hecla common stock or shares of RevettMines Management common stock changes before the closing of the merger?

A:No change will be made to the exchange ratio of 0.16220.2218 if the market price of shares of RevettMines Management common stock or shares of Hecla common stock changes before the closing of the merger.

Q: How will RevettMines Management stockholders receive the merger consideration to which they are entitled?

A:After receiving the proper documentation from you, following the effective datetime of the merger, the exchange agent will forward to you (if you are the holder of record) or to your broker, bank, trust company or other nominee (if your shares are held through such entity)(each, a “broker”) the shares of Hecla common stock and cash in lieu of fractional shares to which you are entitled. For additional information about the exchange of RevettMines Management shares of common stock for Hecla shares of common stock, see the section entitled “Proposal 1: The Approval and Adoption of the Merger Agreement—Exchange of Shares in the Merger” beginning on page 55.62.

You do not need to take any action at this time.Please do not send your Revett Mines Managementstock certificates with your proxy card.

Q: How does Hecla common stock differ from RevettMines Management common stock?

A:Your rights as a Hecla stockholder will be different than your rights as a RevettMines Management stockholder. A chart comparing your rights as a RevettMines Management stockholder to your rights as a Hecla stockholder is included in this proxy statement/prospectus. Please see “Comparative Rights of Hecla Stockholders and RevettMines Management Stockholders” beginning at page 7684 of this proxy statement/prospectus.

Q: Will the shares of Hecla common stock issued in connection with the Mergermerger be listed for trading on a stock exchange?

A:Hecla’s outstanding common stock is currently listed on the New York Stock Exchange (the “NYSE”). Hecla has filed an application to have the Hecla shares issued as part of the merger approved for listing on the NYSE upon notice of issuance.

Q: When does RevettMines Management expect the transaction to be completed?

A:Hecla and RevettMines Management are working to complete the merger as quickly as practicable and currently expect that it couldwill be completed in the secondthird quarter of 2015,2016, promptly after the special meeting.

Q: What are the material United StatesU.S. federal income tax consequences of the transaction?

A:RevettMines Management is not expected to recognize any gain or loss for U.S. federal income tax purposes as a result of the merger. RevettMines Management stockholders that are U.S. holders are not expected to recognize any gain or loss for U.S. federal income tax purposes upon the merger, except for any gain or loss attributable to the receipt of cash in lieu of fractional shares of Hecla common stock received in the merger.

The aggregate tax basis of the Hecla common stock received in the merger (including fractional shares deemed received and redeemed) will be equal to the aggregate adjusted tax basis of the shares of RevettMines Management common stock surrendered for the Hecla common stock, and the holding period of the Hecla common stock (including fractional shares deemed received and redeemed) will include the period during which the shares of RevettMines Management common stock were held.

RevettMines Management has received the opinion of Randall | Danskin, P.S.Davis Graham & Stubbs LLP that more likely than not, the merger will qualify as a tax-free reorganization described in Section 368 of the United StatedStates Internal Revenue Code of 1986, as amended (the “Code”). You are encouraged to read the opinion, which is attached as Appendix C. In addition, you should also read the discussion in the section entitled “Proposal 1: The Approval and Adoption of the Merger Agreement—Material U.S. Federal Income Tax Consequences of the Merger” on page 5360 of this proxy statement/prospectus and consult your own tax advisors as to the United StatesU.S. federal income tax consequences of the merger, as well as the effects of state, local and foreign tax laws.

Q: What vote of RevettMines Management stockholders is required to approve and adopt the Merger?merger?

A:Approval of theand adoption of the merger requires the affirmative vote of the holders of a majority of the outstanding sharesvotes cast by holders of RevettMines Management common stock. stock present in person or represented by proxy at the special meeting and entitled to vote on the proposal, and a quorum must be present at the special meeting.Only holders of record of RevettMines Management common stock at the close of business on [     ],July 5, 2016, which is referred to as the record date, are entitled to notice of and to vote at the special meeting. As of the record date, there were [39,273,989][●] shares of RevettMines Management common stock outstanding and entitled to vote at the special meeting.

Q: Are any stockholders already committed to vote in favor of the Merger?merger?

A:Yes. Pursuant to Shareholder Agreementsshareholders agreements with Hecla, Revett’sMines Management’s stockholder Urion Holdings (Malta) Limited, a wholly-owned, indirect subsidiary of Trafigura Beheer B.V. Van Heuven (collectively “Trafigura’),Silver Wheaton Corp. and the following directors and officers of Revett: John G. Shanahan, Kenneth S. Eickerman, Douglas Miller, Monique Hayes, Timothy Lindsey, Albert F. Appleton, Larry M. Okada, and John B. McCombe,Mines Management have each agreed to vote all of the shares of RevettMines Management common stock (as set forth in such shareholder’s shareholders agreement) that they directly, indirectly or beneficially own or control at the special meeting in favor of the merger. These shares representmerger: Glenn Dobbs, Douglas Dobbs, Nicole Altenburg, Russell Babcock, Roy Franklin and Robert Russell. Shares representing approximately 14.73%17.6% of the outstandingMines Management common stock (which include 1,472,621 shares of RevettMines Management common stock subject to currently exercisable options) are subject to the shareholders agreements as of the date of this proxy statement/prospectus. For a more complete description of the ShareholderShareholders Agreements, see “Proposal 1: The Approval and Adoption of the Merger Agreement—ShareholderShareholders Agreements” beginning at page 5764 of this proxy statement/prospectus. The form of ShareholderShareholders Agreement is also attached to this proxy statement/prospectus as Appendix D.

Q: Are there any risks to me in approving and adopting the Merger?merger?

A:Yes. You should carefully review the section entitled “Risk Factors” beginning on page 22 this proxy statement/prospectus.23.

Q: What happens if the Mergermerger is not completed?

A:If the merger is not approved and adopted by the RevettMines Management stockholders or the merger does not occur for any other reason, neither RevettMines Management nor its stockholders will receive any shares of Hecla common stock. Instead, RevettMines Management will remain an independent public company, and Revett’sMines Management’s common stock willmay continue to be quoted on the NYSE MKT and TSX. See “Risk Factors—Risk Factors Relating to Mines Management.” Further, if the merger does not occur under specified circumstances, RevettMines Management may be required to pay Hecla a termination fee and reimburse Hecla for its expenses incurred under the merger agreement as described underin the section entitled “Proposal 1: The Approval and Adoption of the Merger Agreement—The Merger Agreement—Termination Fees and Expenses” beginning on page 69. Revett78. Mines Management is experiencing severe financial challenges, and stockholders should carefully review the discussion of such challenges set forth in “Risk Factors—Risk Factors Relating to Revett—Liquidity Considerations and Going Concern”Mines Management” beginning on page 26,28 and elsewhere in this proxy statement/prospectus. If the merger is not completed, RevettMines Management would have to seek additional financing, which may well be unavailable, or consider other alternatives, including a bankruptcy filing.

Q: Am I entitled to appraisal or dissenters’ rights?

A:No. Under DelawareIdaho law, holders of RevettMines Management common stock will not be entitled to dissenters’ or appraisal rights. Therefore, holders of RevettMines Management common stock as of the record date that are against the merger may vote against approval and adoption of the merger agreement but may not exercise dissenters’ or appraisal rights. See “No Appraisal Rights” beginning on page 85.93.

Q: When and where will the special meeting of RevettMines Management stockholders be held?

A:The special meeting of RevettMines Management stockholders will be held at [     ],the Lincoln Building, 811 W. Riverside, 2^nd floor conference room, Spokane, Valley, Washington 99201, on [                     ], 2015,Wednesday, August 10, 2016, at [             ] a.m.2:00 p.m., local time.

Q: Who can attend and vote at the special meeting?

A:All RevettMines Management stockholders of record as of the close of business on the record date are entitled to receive notice of, to attend and to vote at the special meeting.

Q: How can I attend the special meeting?

A:All of Revett’sMines Management’s stockholders are invited to attend the special meeting. Please be prepared to provide identification, such as a driver’s license or passport, before being admitted to the special meeting. If you hold your shares in “street name,” that is, if you hold your shares in a stock brokerage account or if your shares are held by a broker, bank, trust company or other nominee (that is, in “street name”), you will need to provide proof of ownership to be admitted to the special meeting. A brokerage statement or letter from your broker bank, trust company or other nominee proving ownership of the shares on the record date for the special meeting are examples of proof of ownership. To help RevettMines Management plan for the special meeting, please indicate whether you expect to attend by responding affirmatively when prompted during Internet or telephone proxy submission or by marking the attendance box on your proxy card.

Q: What constitutes a quorum at the special meeting?

A:The presence, in person or by proxy, of the holders of not less than one-thirda majority of the voting power of the RevettMines Management common stock entitled to vote at the special meeting shall constitute a quorum for the transaction of business. The inspectors of election will treat abstentionsAbstentions and broker non-votes will be counted as shares that are present and entitled to vote for purposes of determining the presence ofestablishing a quorum. A broker non-vote occurs when a broker or other nominee that holds shares on behalf of a street name“street name” stockholder returns a valid proxy card, but does not vote on a particular matter because it does not have discretionary authority to vote on that particular matter and has not received voting instructions from the street name“street name” stockholder.

Q: What should I do now in order to vote on the proposals being considered at the special meeting?

A:RevettMines Management stockholders as of the record date may vote by proxy by

If you hold shares of RevettMines Management common stock in “street name,” which means that your shares are held of record by a broker, bank or other nominee, please refer to the voting instruction form used by your broker bank or other nominee to see how to vote your shares.

Additionally, you may also vote in person by attending the special meeting. If you plan to attend the special meeting and wish to vote in person, you will be given a ballot at the special meeting. Please note, however, that if your shares are held in “street name,”name” and you wish to vote at the special meeting, you must bring a proxy from the record holder of the shares authorizing you to vote at the special meeting. Whether or not you plan to attend the special meeting, you should submit your proxy card or voting instruction form as described in this proxy statement/prospectus.

Q: If my shares are held in “street name” by my broker, will my broker automatically vote my shares for me?

A: No. If you hold your shares in a stock brokerage account or if your shares are held by a broker bank, trust company or other nominee (that is, in “street name”), your broker bank, trust company or other nominee (“broker”) cannot vote your shares on any of the proposals to be considered at the special

meeting as all such proposals are “non-routine” matters. You should instruct your broker as to how to vote your shares, following the directions from your broker bank, trust company or other nominee provided to you. Please check the voting form used by your broker. If you do not provide your broker with instructions, your shares Revettof Mines Management common stock will not be voted on any proposal at the special meeting. Please note that you may not vote shares held in street name“street name” by returning a proxy card directly to RevettMines Management or by voting in person at the applicable special meeting unless you provide a legal proxy, which you must obtain from your broker.

Q: What will happen if I abstain from voting or fail to vote?

A:RevettMines Management cannot complete the merger unless its stockholders approve and adopt the merger agreement and the transactions contemplated thereby. Because approval and adoption is based on the affirmative vote of at least a majority of the outstanding sharesvotes cast by holders of RevettMines Management common stock present in person or represented by proxy at the special meeting and entitled to vote on the proposal, assuming a Revettquorum is present, a Mines Management stockholder’s failure to vote an abstention from voting or the failure of a RevettMines Management stockholder who holds his or her shares in “street name” through a broker to give voting instructions to such broker will have the sameno effect as a vote “AGAINST” adoption ofon the merger agreement.proposal, assuming a quorum is present. If a Mines Management stockholder marks his or her proxy or provides voting instructions to abstain, it will have no effect on the merger proposal, assuming a quorum is present.

Q: What will happen if I sign my proxy without specifying my voting preference?

A:If you submit a signed proxy without specifying the manner in which you would like your shares to be voted, your shares will be voted “FOR” the merger proposal, “FOR” the adjournment proposal and “FOR” the compensation proposal.

Q: Can I change my vote after I have delivered my proxy?

A:Yes. You can change your vote at any time before your proxy is voted at the special meeting. If you are a holder of record, you can do this in one of three ways:

Q: What happens if I transfer my shares of RevettMines Management stock before the special meeting?

A:The record date for the special meeting is earlier than both the date of the special meeting and the date that the merger is expected to be completed. If you transfer your RevettMines Management shares after the record date for the special meeting, you will retain your right to vote at the special meeting, but you will have transferred the right to receive the merger consideration in the merger. In order to receive the merger consideration, you must hold your shares through the effective datetime of the merger.

Q: What should I do if I receive more than one set of voting materials for the special meeting?

A:You may receive more than one set of voting materials for the special meeting, including multiple copies of this proxy statement/prospectus and multiple proxy cards or voting instruction forms. For example, if you hold

your shares in more than one brokerage account, you will receive a separate voting instruction form for each brokerage account in which you hold shares. If you are a holder of record and your shares are registered in more than one name, you will receive more than one proxy card. For each and every proxy card and voting instruction form that you receive, please vote as soon as possible by completing, signing, dating and returning the enclosed proxy card in the postage-prepaid envelope enclosed for that purpose.purpose or by accessing the Internet website or by calling the toll-free number specified on your proxy cards.

Q: Who can help answer my questions?

A:If you have any questions about the merger or the merger agreement or how to submit your proxy, or if you need additional copies of this proxy statement/prospectus or the enclosed proxy card or voting instructions, you should contact:

CAUTIONARY STATEMENT REGARDING FORWARD-LOOKING STATEMENTS

This proxy statement/prospectus and the information incorporated by reference herein contains numerous forward-looking statements within the meaning of Section 27A of the Securities Act and Section 21E of the Exchange Act, including statements relating to the financial condition, results of operations, business strategies, operating efficiencies or synergies, projected timetable, expected tax treatment of the transaction, competitive positions, growth opportunities, plans and objectives of the management of each of Hecla and Revett,Mines Management, the merger and other transactions contemplated by the merger agreement, the markets for Hecla and RevettMines Management common stock and other matters. Such forward-looking statements may be identified by the use of words such as “believes,” “intends,” “expects,” “hopes,” “may,” “should,” “will,” “plan,” “projected,” “contemplates,” “anticipates” or similar words. Such forward-looking statements involve known and unknown risks, uncertainties and other factors which may cause actual results, performance or achievements to be materially different from any future results, performance or achievements expressed or implied by the forward-looking statements. The factors that could cause actual results to differ materially from those projected in the forward-looking statements include but are not limited to:

Given these risks and uncertainties, readers are cautioned not to place undue reliance on forward-looking statements. Projections and other forward-looking statements included in this proxy statement/prospectus have been prepared based on assumptions, which Hecla and RevettMines Management believe to be reasonable, but not in

accordance with United States generally accepted accounting principles (“GAAP”) or any guidelines of the SEC. Actual results may vary, perhaps materially. You are strongly cautioned not to place undue reliance on such projections and otherforward-looking statements. All subsequent written and oral forward-looking statements attributable to Hecla, Revett,Mines Management or to persons acting on each of their behalf are expressly qualified in their entirety by these cautionary statements. Except as required by federal securities laws, Hecla and RevettMines Management each disclaim any intention or obligation to update or revise any forward-looking statements, whether as a result of new information, future events or otherwise.