Amending Agreement dated June 4, 2018

The Purchaser, Acquireco and the Company are party to an arrangement agreement dated March 16, 2018 (the “Arrangement Agreement”) pursuant to which, among other things, the Purchaser has agreed to acquire, indirectly, all of the issued and outstanding common shares in the capital of Klondex pursuant to an arrangement under the Business Corporations Act (British Columbia); and

the Purchaser, Acquireco and the Company wish to amend the Arrangement Agreement.

Unless otherwise defined herein, terms that are defined in the Arrangement Agreement have the same meaning in this Amending Agreement.

The plan of arrangement attached as Schedule A to the Arrangement Agreement is hereby amended and replaced in its entirety with the plan of arrangement attached as Schedule A hereto.

The defined term “Outside Date” in the Arrangement Agreement is hereby amended from “July 16, 2018” to “July 30, 2018”.

All other provisions of the Arrangement Agreement remain in full force and effect, unamended.

This Amending Agreement shall be binding on and shall inure to the benefit of the parties and their respective successors and permitted assigns.

This Amending Agreement may be executed and delivered in any number of counterparts (including by facsimile or electronic transmission), each of which will be deemed to be an original and all of which taken together will be deemed to constitute one and the same instrument.

“0985472” means 0985472 B.C. Ltd., a corporation existing under the BCBCA and a wholly-owned subsidiary of the Company, and, following the completion of the step in Section 3.02(s), 0985472 B.C. Unlimited Liability Company;

“Acquireco” means 1156291 Unlimited Liability Company, an unlimited liability company existing under the BCBCA and a wholly-owned subsidiary of the Purchaser;

“Acquireco Common Shares” means the common shares in the capital of Acquireco;

“Affected Securities” means the Company Shares, the Company Options, the Company DSUs, and the Company RSUs;

“Affected Securityholders” means the Company Shareholders, the Company Optionholders, the Company DSU Holders, and the Company RSU Holders;

“Aggregate Elected Cash” means the aggregate Cash Consideration payable to Participating Former Securityholders who make a valid election to receive the Cash Consideration in respect of all of their Company Shares pursuant to Section 3.02(l), without regard to Section 3.02(m);

“Aggregate Elected Purchaser Shares” means the aggregate Purchaser Share Consideration payable to Participating Former Securityholders who make a valid election to receive the Purchaser Share Consideration in respect of all of their Company Shares pursuant to Section 3.02(l), without regard to Section 3.02(n);

“Amalco One ULC” shall have the meaning ascribed to such term in Section 3.02(v);

“Amalco Two ULC” shall have the meaning ascribed to such term in Section 3.02(x);

“Arrangement Agreement” means the arrangement agreement dated as of March 16, 2018 among the Purchaser, Acquireco and the Company, together with the disclosure letter delivered by the Company in connection with the Arrangement Agreement, as the same may be amended, supplemented or otherwise modified from time to time in accordance with the terms thereof;

“Arrangement Consideration” means the Purchaser Shares, Spinco Shares and cash payment that Participating Former Securityholders are entitled to receive under this Plan of Arrangement;

“Arrangement Resolution” shall have the meaning ascribed to such term in the Arrangement Agreement;

“Arrangement” means the arrangement under section 288 of the BCBCA on the terms and subject to the conditions set out in this Plan of Arrangement, subject to any amendments or variations thereto made in accordance with Section 8.10 of the Arrangement Agreement, this Plan of Arrangement or at the direction of the Court;

“Award Agreement” means an agreement between the Company and a participant in, or pursuant to, any Company Option Plan setting out the participant’s entitlement to receive any Company Options or Company RSUs;

“BCBCA” means the Business Corporations Act (British Columbia) and the regulations made thereunder, as promulgated or amended from time to time;

“Bison” means Bison Gold Resources Inc., a corporation existing under the laws of the Province of Ontario and a wholly-owned subsidiary of the Company;

“Bison Shares” means all of the issued and outstanding shares in the capital of Bison immediately prior to the Effective Time;

“Business Day” means any day other than a Saturday, a Sunday or a statutory or civic holiday in Vancouver, British Columbia or New York, New York;

“Cash Consideration” means US$2.47 in cash per Class A Share;

“Class A Shares” shall have the meaning ascribed to such term in Section 3.02(h)(i);

“Combination Consideration” means the Combination Consideration Cash and the Combination Consideration Purchaser Shares;

“Combination Consideration Cash” means US$0.8411 in cash per Class A Share;

“Combination Consideration Purchaser Shares” means 0.4136 of a Purchaser Share per Class A Share

“Company” means Klondex Mines Ltd., a corporation existing under the BCBCA, and, following the completion of the step in Section 3.02(t), Klondex Mines Unlimited Liability Company;

“Company 2013 Options” means, at any time, options to acquire Company Shares granted pursuant to the Company 2013 Share Incentive Plan, which are, at such time, outstanding and unexercised, whether or not vested;

“Company 2013 Share Incentive Plan” means the Share Incentive Plan of the Company dated for reference May 9, 2013;

“Company 2013 RSUs” means, at any time, rights to receive Company Shares awarded under the Company 2013 Share Incentive Plan, which are, at such time, outstanding and unexercised, whether or not vested;

“Company 2016 Options” means, at any time, options to acquire Company Shares granted pursuant to the Company 2016 Stock Option Plan, which are, at such time, outstanding and unexercised, whether or not vested;

“Company 2016 Stock Option Plan” means the Share Option and Restricted Share Unit Plan of the Company effective May 13, 2016;

“Company 2016 RSUs” means, at any time, rights to receive Company Shares awarded under the Company 2016 Share Incentive Plan, which are, at such time, outstanding and unexercised, whether or not vested;

“Company DSU” means a deferred share unit issued under the Company DSU Plan;

“Company DSU Holder” means a holder of Company DSUs;

“Company DSU Plan” means the Deferred Share Unit Plan of the Company effective May 13, 2016;

“Company Meeting” means the special meeting of Affected Securityholders, including any adjournment or postponement thereof, to be held in accordance with the Interim Order to consider the Arrangement Resolution;

“Company Option Plans” means the Company 2013 Share Incentive Plan and Company 2016 Stock Option Plan;

“Company Optionholder” means a holder of any Company Options;

“Company Options” means the Company 2013 Options and Company 2016 Options;

“Company RSU Holder” means a holder of any Company RSUs;

“Company RSUs” means, at any time, Company 2013 RSUs and Company 2016 RSUs;

“Company Shares” means the common shares in the capital of the Company;

“Company Share Value” means the five day volume-weighted average price of the Company Shares on the Toronto Stock Exchange determined as of the close of business on the second Business Day immediately preceding the Effective Date;

“Company Shareholder” means a holder of any Company Shares;

“Court” means the Supreme Court of British Columbia;

“CRA” means the Canada Revenue Agency;

“Depositary” means any trust company, bank or other financial institution agreed to in writing by each of the Parties for the purpose of, among other things, exchanging certificates representing Company Shares for the Arrangement Consideration in connection with the Arrangement;

“Dissent Rights” shall have the meaning ascribed to such term in Section 4.01;

“Dissenting Shareholder” means a registered Company Shareholder who dissents in respect of the Arrangement in strict compliance with the Dissent Rights and who is ultimately entitled to be paid fair value for their Company Shares;

“Distribution Spinco Shares” shall have the meaning ascribed to such term in Section 3.02(g);

“Effective Date” means the date on which the Arrangement takes effect pursuant to the BCBCA;

“Effective Time” means 12:01 a.m. (Vancouver time) on the Effective Date, or such other time as the Parties may agree in writing before the Effective Date;

“Election Deadline” shall have the meaning ascribed to such term in Section 3.03(b);

“Election Form” means:

with respect to any Company Share outstanding immediately prior to the Effective Time, the Letter of Transmittal; and

with respect to any Company Option or Company RSU outstanding immediately prior to the Effective Time, the Option/RSU Election Form;

“Encumbrance” means any mortgage, hypothec, pledge, assignment, charge, lien, claim, security interest, adverse interest, other third person interest or encumbrance of any kind, whether contingent or absolute, and any agreement, option, right or privilege (whether by law, contract or otherwise) capable of becoming any of the foregoing;

“Existing Company Directors” means those persons who are directors of the Company immediately prior to the Effective Time;

“Final Order” shall have the meaning ascribed to such term in the Arrangement Agreement;

“First Amalgamation” shall have the meaning ascribed to such term in Section 3.02(v);

“Former Securityholders” means holders of Affected Securities immediately prior to the Effective Time;

“Initial Election Deadline” shall have the meaning ascribed to such term in Section 3.03(b);

“Initial Spinco Share” shall have the meaning ascribed to such term in Section 3.01(a);

“Interim Order” means the interim order of the Court, providing for, among other things, the calling and holding of the Company Meeting, as the same may be amended by the Court;

“In-the-Money Amount” means, in respect of a Company Option, the positive amount, if any, by which (i) the product obtained by multiplying (A) the number of Company Shares underlying such Company Option, by (B) the Company Share Value, exceeds (ii) the aggregate purchase price payable under such Company Option to acquire the Company Shares underlying such Company Option;

“In-the-Money Option” means a Company Option in respect of which the In-the-Money Amount, determined as of the last Business Day immediately preceding the Effective Date, is a positive amount;

“Klondex Canada” means Klondex Canada Ltd., a corporation existing under the BCBCA and a wholly-owned subsidiary of the Company;

“Klondex Canada Shares” means all of the issued and outstanding shares in the capital of Klondex Canada immediately prior to the Effective Time;

“Klondex Canada Subco” means a corporation to be incorporated under the BCBCA and a wholly-owned subsidiary of Klondex Canada;

“Klondex Canada Subco Note” shall have the meaning ascribed to such term in the definition section of the Arrangement Agreement;

“Klondex US” means Klondex Holdings (USA) Inc., a corporation existing under the laws of the State of Nevada and a wholly-owned subsidiary of 0985472;

“Letter of Transmittal” means the letter of transmittal and election form to be delivered by the Company to the Company Shareholder, providing for the delivery of Company Shares to the Depositary;

“Maximum Cash Consideration” means US$157,410,417;

“Maximum Purchaser Shares” means 77,411,859 Purchaser Shares;

“New Company Directors” means Robert A. Brown and Dean W. A. McDonald;

“Option Consideration” means, in respect of an In-the-Money Option, that number of Company Shares obtained by dividing: (i) the In-the-Money Amount in respect of such Company In-the-Money Option, by (ii) the Company Share Value, with the result rounded down to the nearest whole number of Company Shares;

“Option/RSU Election Form” means the election form to be delivered by the Company to the Company Option holders and Company RSU Holders;

“Out-of-the-Money Option ” means each Company Option other than an In-the-Money Option;

“Participating Former Securityholders” means Former Securityholders, other than holders of Out-of-the-Money Options, Company DSU Holders and Dissenting Shareholders;

“Performance RSU” shall have the meaning ascribed to such term in the Company 2016 Stock Option Plan;

“Plan of Arrangement” means this plan of arrangement, as amended, modified or supplemented from time to time in accordance with Section 8.10 of the Arrangement Agreement or Article 6 hereof, in each case with the consent of the Company and Purchaser, each acting reasonably, or at the direction of the Court in the Final Order;

“Purchaser” means Hecla Mining Company, a corporation incorporated under the laws of Delaware;

“Purchaser Consideration” shall have the meaning ascribed to such term in Section 3.02(a);

“Purchaser Share” means a share of the common stock in the authorized share capital of the Purchaser, US$0.25 par value per share;

“Purchaser Share Consideration” means 0.6272 of a Purchaser Share per Class A Share;

“Purchaser Spinco Shares” means that number of Spinco Shares equal to the product obtained when (A) the number of issued and outstanding Spinco Shares immediately following the Spinco Share Consolidation, is multiplied by (B) 0.155535, rounded down to the nearest whole number of Spinco Shares, such that immediately following the completion of the Arrangement the Purchaser Spinco Shares shall represent approximately 13.46% of the issued and outstanding Spinco Shares;

“Purchaser Spinco Subscription Amount” means the Canadian dollar equivalent of US$7,000,000, determined as at the close of business on the second Business Day immediately preceding the Effective Date;

“RSU Consideration” means:

with respect to each Company RSU that is not a Performance RSU, one Company Share for each Company RSU, and

with respect to each RSU that is a Performance RSU, a cash payment in an amount determined in accordance with Section 2.16 of the Arrangement Agreement;

“Second Amalgamation” shall have the meaning ascribed to such term in Section 3.02(x);

“Spinco” means a corporation to be incorporated under the BCBCA and a wholly-owned subsidiary of the Company;

“Spinco Contribution Agreement” shall have the meaning ascribed to such term in section 1.1 of the Arrangement Agreement;

“Spinco Property” means the Klondex Canada Shares, the Bison Shares, and the Klondex Canada Subco Note;

“Spinco Share Consideration” means 0.125 of a Spinco Share for each Company Share (after giving effect to the Spinco Share Consolidation);

“Spinco Share Consolidation” has the meaning ascribed to such term in Section 3.02(j);

“Spinco Shares” means the common shares in the capital of Spinco;

“Tax Act” means the Income Tax Act (Canada) and the regulations thereunder, as amended from time to time;

“US$” shall mean the lawful currency of the United States of America; and

“U.S. Tax Code” means the United States Internal Revenue Code of 1986, as amended.

the Purchaser;

the Company;

Acquireco;

Spinco;

Klondex Canada;

0985472;

each of the Former Securityholders; and

the Depositary.

The Company shall have incorporated Spinco under the BCBCA and Spinco shall have issued one common share (the “Initial Spinco Share”) to the Company.

The Company and Spinco shall have entered into the Spinco Contribution Agreement.

the Purchaser shall subscribe for that number of Acquireco Common Shares, at a price of $1.00 per share, equal to the quotient obtained when (A) the fair market value of the Maximum Purchaser Shares and Maximum Cash Consideration is divided by (B) $1.00, and for greater certainty for the purposes of determining variable (A) in relation to the quotient under this Section 3.02(a), the fair market value of the Maximum Purchaser Shares and the Maximum Cash Consideration will be no less than the fair market value of the Class A Shares immediately prior to the acquisition of the Class A Shares by Acquireco pursuant to Section 3.02(k), and in connection with such share subscription:

the Purchaser shall be deemed to have directed the Depositary to hold, and the Depositary shall hold, the cash and certificates representing the Purchaser Shares delivered by the Purchaser to the Depositary in accordance with Section 3.05(a)(i) (such cash and Purchaser Shares, collectively, the “Purchaser Consideration”) for and on behalf of Acquireco, in satisfaction of the subscription price payable by the Purchaser for such Acquireco Common Shares; and

Acquireco shall be deemed to have issued such fully paid and non-assessable Acquireco Common Shares to the Purchaser, and the stated capital account maintained by Acquireco in respect of the Acquireco Common Shares shall be increased, in respect of the Acquireco Common Shares issued pursuant to this Section 3.02(a), by an amount equal to the fair market value of the Purchaser Consideration;

notwithstanding any vesting or exercise provisions to which a Company Option might otherwise be subject (whether by contract, the terms and conditions of any Award Agreement or grant, the terms and conditions of the Company 2013 Share Incentive Plan or Company 2016 Stock Option Plan, or applicable law):

each In-the-Money Option issued and outstanding immediately prior to the Effective Time shall, without any further action by or on behalf of any holder of such In-the-Money Option, be deemed to be fully vested and shall be transferred and disposed by the holder thereof to the Company (free and clear of all Encumbrances) and cancelled in exchange for the Option Consideration, and the holder of such In-the-Money Option shall become the holder of the Company Shares comprising such Option Consideration and the central securities register of the Company shall be revised accordingly, but the holder of such Option Consideration shall not be entitled to receive a share certificate or other document representing the Option Consideration;

each Out-of-the-Money Option issued and outstanding immediately prior to the Effective Time shall, without any further action by or on behalf of any holder of such Out-of-the-Money Option, be cancelled without any payment therefor;

with respect to each Company Option:

the holder thereof shall cease to be the holder of such Company Option, and shall cease to have any rights as a holder in respect of such Company Option under the applicable Company Option Plan,

such holder’s name shall be removed from the register of Company Options, and

all option agreements, Award Agreements, grants and similar instruments relating thereto shall be cancelled;

notwithstanding any vesting provisions to which a Company RSU might otherwise be subject (whether by contract, the terms and conditions of any Award Agreement or grant, the terms and conditions of the Company 2013 Share Incentive Plan or Company 2016 Stock Option Plan, or applicable law):

each Company RSU issued and outstanding immediately prior to the Effective Time shall, without any further action by or on behalf of any holder of such Company RSU, be deemed to be fully vested and shall be transferred and disposed by the holder thereof to the Company (free and clear of all Encumbrances) and cancelled in exchange for the applicable RSU Consideration, and the holder of such Company RSU shall become the holder of the Company Shares comprising such RSU Consideration and the central securities register of the Company shall be revised accordingly, but the holder of such RSU Consideration shall not be entitled to receive a share certificate or other document representing the RSU Consideration;

with respect to each Company RSU:

the holder thereof shall cease to be the holder of such Company RSU, and shall cease to have any rights as a holder in respect of such Company RSU under the applicable Company Option Plan,

such holder’s name shall be removed from the register of Company RSUs, and

all Award Agreements, grants and similar instruments relating thereto will be cancelled;

the Company Option Plans shall be terminated;

each Company Share held by a Dissenting Shareholder shall be, and shall be deemed to be, surrendered to the Company by the holder thereof, without any further act or formality by such Dissenting Shareholder, free and clear of all Encumbrances, and each such Company Share so surrendered shall be cancelled and thereupon each Dissenting Shareholder shall cease to have any rights as a holder of such Company Shares other than a claim against the Company in an amount determined and payable in accordance with Article 4 and the name of such Dissenting Shareholder shall be removed from the securities register of holders of Company Shares;

concurrently with the surrender and cancellation of Company Shares held by Dissenting Shareholders pursuant to Section 3.02(e), the stated capital account maintained by the Company in respect of the Company Shares shall be reduced, in respect of the Company Shares cancelled pursuant to Section 3.02(e), by an amount equal to the product obtained when (A) the stated capital of all the issued and outstanding Company Shares immediately prior to the step in Section 3.02(e), is multiplied by (B) a fraction, the numerator of which is the number of Company Shares surrendered and cancelled pursuant to Section 3.02(e), and the denominator of which is the number of issued and outstanding Company Shares immediately prior to the step in Section 3.02(e);

the Company shall transfer all of its entire legal and beneficial right, title and interest in and to the Spinco Property to Spinco in consideration for the issuance by Spinco to the Company of that number of fully paid and non-assessable Spinco Shares (the “Distribution Spinco Shares”) equal to the number of Company Shares issued and outstanding immediately prior to the transfer in this Section 3.02(g) (for the avoidance of doubt, excluding any Company Shares in respect of which Dissenting Shareholders have exercised Dissent Rights), all in accordance with the terms of the Spinco Contribution Agreement;

in the course of a reorganization of the Company’s authorized and issued share capital:

the notice of articles and articles of the Company shall be amended to create a new class of shares without par value, of which an unlimited number may be issued and which shall be designated the “Class A Shares” (the “Class A Shares”), which shall have the special rights and restrictions set forth in Schedule “A” to this Plan of Arrangement;

each Company Share issued and outstanding immediately before the reorganization of the Company’s share capital pursuant to this Section 3.02(h) (including, without limitation, the Company Shares issued to former holders of In-the-Money Options and Company RSUs pursuant to Section 3.02(b) and Section 3.02(c), respectively, but excluding any Company Shares surrendered and cancelled in accordance with Section 3.02(e)) shall be exchanged with the Company, free and clear of any Encumbrances, for one Class A Share and one Distribution Spinco Share, and upon such exchange:

each such exchanged Company Share shall be cancelled, and the holders of such exchanged Company Shares shall be removed from the Company’s register of holders of Company Shares;

each holder of such exchanged Company Shares shall be entered in the Company’s register of holders of Class A Shares in respect of the Class A Shares issued to such holder;

the Company shall be removed from the Spinco’s register of holders of Spinco Shares in respect of the Distribution Spinco Shares; and

each holder of such exchanged Company Shares shall be entered in Spinco’s register of holders of Spinco Shares in respect of the Distribution Spinco Shares exchanged with such holder by the Company;

concurrently with the exchange in Section 3.02(h)(ii), the stated capital account in respect of the Company Shares shall be reduced by an amount equal to the stated capital of the Company Shares immediately prior to the reorganization in Section 3.02(h), and there shall be added to the stated capital account maintained by the Company in respect of the Class A Shares, in respect of the Class A Shares issued pursuant to Section 3.02(h)(ii), the amount by which (A) the amount by which the stated capital account of the Company Shares is reduced pursuant to this Section 3.02(h)(iii), exceeds (B) the fair market value of the Distribution Spinco Shares transferred to the former holders of Company Shares pursuant to Section 3.02(h)(ii);

the Initial Spinco Share held by the Company shall be cancelled without any repayment thereon, and the Company shall be removed from the Spinco register of holders of Spinco Shares;

all of the issued and outstanding Spinco Shares shall be consolidated (the “Spinco Share Consolidation”) on the basis of one post-consolidation Spinco Share for each eight (8) pre-consolidation Spinco Shares held by a holder of Spinco Shares, and any fractional Spinco Shares resulting from such Spinco Share Consolidation shall be cancelled without payment or compensation therefor, and upon such Spinco Share Consolidation the register of holders of Spinco Shares shall be amended to reflect the Spinco Share Consolidation;

each Participating Former Securityholder receiving Class A Shares pursuant to Section 3.02(h)(ii) who:

duly and validly completes and delivers the applicable Election Form(s) in accordance with Section 3.03 and Section 3.04 electing to receive the Combination Consideration in respect of all of such Participating Former Securityholder’s Company Shares;

has not completed and delivered the applicable Election Form(s) by the Election Deadline or who has otherwise failed to make a valid election to receive the Cash Consideration or the Purchaser Share Consideration is respect of all of such Participating Former Securityholder’s Company Shares; or

exercises Dissent Rights and is ultimately not entitled, for any reason, to be paid fair value for its Company Shares,

each such Participating Former Securityholder shall be removed from the Company’s securities register of holders of Class A Shares,

Acquireco shall be entered in the Company’s securities register of holders of Class A Shares as the legal and beneficial owner of such Class A Shares, free of all Encumbrances; and

each such Participating Former Securityholder shall, subject to the provisions of Section 3.06, be entered in the Purchaser’s securities register of holders of Purchaser Shares in respect of the Purchaser Shares payable to such Participating Former Securityholder pursuant to this Section 3.02(k);

each Participating Former Securityholder receiving Class A Shares pursuant to Section 3.02(h)(ii) who duly and validly completes and delivers the applicable Election Form(s) in accordance with Section 3.03 and Section 3.04 electing to receive either the Cash Consideration or the Purchaser Share Consideration in respect of all of such Participating Former Securityholder’s Company Shares shall transfer, and shall be deemed to have transferred, to Acquireco, without any further act or formality by such Participating Former Securityholder, free and clear of all Encumbrances, each Class A Share held by such Participating Former Securityholder immediately prior to the exchange in this Section 3.02(l) in exchange for:

in the case of a Participating Former Securityholder validly electing to receive the Cash Consideration, the Cash Consideration, subject to the provisions of Section 3.02(m); and

in the case of a Participating Former Securityholder validly electing to receive the Purchaser Share Consideration, the Purchaser Share Consideration, subject to the provisions of Section 3.02(n),

each such Participating Former Securityholder shall be removed from the Company’s securities register of holders of Class A Shares,

Acquireco shall be entered in the Company’s securities register of holders of Class A Shares as the sole legal and beneficial owner of such Class A Shares, free of all Encumbrances; and

each such Participating Former Securityholder shall, subject to the provisions of Section 3.02(m) or Section 3.02(n), as applicable, and Section 3.06, be entered in the Purchaser’s securities register of holders of Purchaser Shares in respect of the Purchaser Shares, if any, payable to such Participating Former Securityholder;

in the event that (A) the sum of (I) the aggregate Combination Consideration Cash payable pursuant to Section 3.02(k) and (II) the Aggregate Elected Cash, exceeds (B) the Maximum Cash Consideration, each Participating Former Securityholder who validly elects to receive the Cash Consideration in respect of all of such Participating Former Securityholder’s Company Shares shall, notwithstanding Section 3.02(l)(i):

only be entitled to receive the Cash Consideration for that portion of their Class A Shares equal to a fraction, rounded to six decimal places, the numerator of which is the Maximum Cash Consideration minus the aggregate Combination Consideration Cash payable pursuant to Section 3.02(k), and the denominator of which is the Aggregate Elected Cash; and

be entitled to receive the Purchaser Share Consideration for the remaining portion of their Class A Shares (including, for the avoidance of doubt, a corresponding portion of the Purchaser Share Consideration for any fractional Class A Share included in such remaining portion);

in the event that (A) the sum of (I) the aggregate Combination Consideration Purchaser Shares payable pursuant to Section 3.02(k) and (II) the Aggregate Elected Purchaser Shares, exceeds (B) the Maximum Purchaser Share Consideration, each Participating Former Securityholder who validly elects to receive the Purchaser Share Consideration shall, notwithstanding Section 3.02(l)(ii):

only be entitled to receive the Purchaser Share Consideration for that portion of their Class A Shares equal to a fraction, rounded to six decimal places, the numerator of which is the Maximum Purchaser Share Consideration minus the aggregate Combination Consideration Purchaser Shares payable pursuant to Section 3.02(k), and the denominator of which is the Aggregate Elected Purchaser Shares; and

be entitled to receive the Cash Consideration for the remaining portion of their Class A Shares (including, for the avoidance of doubt, any fractional Class A Share included in such remaining portion);

the resignations of the Existing Company Directors, and the appointment of the New Company Directors, shall be deemed to be effective immediately following the transfers of the Class A Shares to Acquireco pursuant to Section 3.02(k) and Section 3.02(l);

upon the resignation of the Existing Company Directors becoming effective, each Company DSU outstanding immediately prior to the Effective Time shall be cancelled in exchange for a cash payment by the Company to the holder of such Company DSU equal to the Company Share Value;

the Company DSU Plan shall be terminated;

the Company shall file with the CRA an election pursuant to section 89(1) of the Tax Act to cease to be a public corporation for purposes of the Tax Act;

the notice of articles of 0985472 shall be altered to provide that 0985472 shall become an unlimited liability company, and that the name of 0985472 shall be “0985472 BC Unlimited Liability Company”;

the notice of articles of the Company shall be altered to provide that the Company shall become an unlimited liability company, and that the name of the Company shall be “Klondex Unlimited Liability Company”;

the aggregate stated capital maintained by 0985472 in respect of its shares shall be reduced to $1.00 without any repayment of capital in respect thereof;

Klondex Unlimited Liability Company and 0985472 shall amalgamate (the “First Amalgamation”) to form one unlimited liability company (“Amalco One ULC”) under section 288 of the BCBCA, and from and after the Effective Date at the time of the step contemplated by this Section 3.02(v):

the property, rights and interests of each of the Company and 0985472 shall continue to be the property, rights and interests of Amalco One ULC, and for greater certainty the First Amalgamation will not constitute a transfer or assignment of the rights or obligations of either of the Company or 0985472 under any such rights, contracts, permits and interests;

Amalco One ULC shall continue to be liable for the obligations of each of the Company and 0985472;

an existing cause of action, claim or liability to prosecution of the Company or Amalco One ULC shall be unaffected;

a legal proceeding being prosecuted or pending by or against the Company or Amalco One ULC may be prosecuted, or its prosecution may be continued, as the case may be, by or against Amalco One ULC;

a conviction against, or a ruling, order or judgment in favour of or against the Company or 0985472 may be enforced by or against Amalco One ULC;

Acquireco shall receive on the amalgamation one Amalco One ULC common share in exchange for each Class A Share held by it immediately prior to the First Amalgamation, and all of the issued and outstanding shares in the capital of 0985472 shall be cancelled without any repayment of capital in respect thereof;

the name of Amalco One ULC shall be “Klondex Mines Unlimited Liability Company”;

Amalco One ULC shall be authorized to issue an unlimited number of common shares without par value;

the articles and notice of articles of Amalco One ULC shall be in the form of the Company’s articles and notice of articles;

the first directors of Amalco One ULC following the amalgamation shall be the New Company Directors; and

the stated capital of the common shares of Amalco One ULC will be an amount equal to the stated capital attributable to the Class A Shares of the Company immediately prior to the amalgamation;

the aggregate stated capital maintained by Amalco One ULC in respect of its common shares shall be reduced to $1.00 without any repayment of capital in respect thereof;

Acquireco and Amalco One ULC shall amalgamate (the “Second Amalgamation”) to form one unlimited liability company (“Amalco Two ULC”) under section 288 of the BCBCA, and from and after the Effective Date at the time of the step contemplated by this Section 3.02(x):

the property, rights and interests of each of Acquireco and Amalco One ULC shall continue to be the property, rights and interests of Amalco Two ULC, and for greater certainty, the Second Amalgamation will not constitute a transfer or assignment of the rights or obligations of either of Acquireco or Amalco One ULC under any such rights, contracts, permits and interests;

Amalco Two ULC shall continue to be liable for the obligations of each of Acquireco and Amalco One ULC;

an existing cause of action, claim or liability to prosecution of Acquireco or Amalco One ULC shall be unaffected;

a legal proceeding being prosecuted or pending by or against Acquireco or Amalco One ULC may be prosecuted, or its prosecution may be continued, as the case may be, by or against Amalco Two ULC;

a conviction against, or a ruling, order or judgment in favour of or against Acquireco or Amalco One ULC may be enforced by or against Amalco Two ULC;

the Purchaser shall receive on the amalgamation one Amalco Two ULC common share in exchange for each Acquireco Common Share held by it immediately prior to the Second Amalgamation, and all of the issued and outstanding common shares of Amalco One ULC shall be cancelled without any repayment of capital in respect thereof;

the name of Amalco Two ULC shall be “Klondex Mines Unlimited Liability Company”;

Amalco Two ULC shall be authorized to issue an unlimited number of common shares without par value;

the articles and notice of articles of Amalco Two ULC shall be in the form of Acquireco’s articles and notice of articles;

the first annual general meeting of Amalco Two ULC shall be held within 18 months from the Effective Date;

the first directors of Amalco Two ULC following the amalgamation shall be the New Company Directors; and

the stated capital of the common shares of Amalco Two ULC will be an amount equal to the stated capital attributable to the Acquireco Common Shares immediately prior to the amalgamation; and

Spinco shall issue the Purchaser Spinco Shares to the Purchaser in consideration for the payment of the Purchaser Spinco Subscription Amount, and the Depositary shall release the Purchaser Spinco Subscription Amount to Spinco, and upon payment of the Purchaser Spinco Subscription Amount in accordance with this Section 3.02(y) Spinco shall be deemed to have issued such fully paid and non-assessable Purchaser Spinco Shares to the Purchaser, and the stated capital account maintained by Spinco in respect of the Spinco Common Shares shall be increased, in respect of the Purchaser Spinco Shares issued pursuant to this Section 3.02(y), by an amount equal to the Canadian dollar equivalent of the Purchaser Spinco Subscription Amount.

Each Participating Former Securityholder will be entitled to make an election in the applicable Election Form(s), in accordance with the provisions of this Section 3.03 and Section 3.04 and the applicable Election Form(s), to receive either (i) the Combination Consideration, (ii) the Cash Consideration or (iii) the Purchaser Share Consideration with respect to all, but not less than all, of their Company Shares (including, for the avoidance of doubt, any Company Shares issued to holders of In-the-Money Options and Company RSUs pursuant to Section 3.02(b) and Section 3.02(c), respectively). Any such election, in the case of Participating Former Securityholders electing to receive the Cash Consideration or the Purchaser Share Consideration, shall be subject to the pro-ration limitations in Section 3.02(m) and Section 3.02(n), as applicable. A Participating Former Securityholder who fails to make a valid election in accordance with the provisions of this Section 3.03 and Section 3.04 will be deemed to have made an election to receive the Combination Consideration with respect to all of such Participating Former Securityholder’s Company Shares.

The deadline by which the election must be received by the Depositary (the “Election Deadline”) shall be 5:00 p.m. (Vancouver time) on •, 2018 (the “Initial Election Deadline”), unless otherwise extended by the Purchaser and the Company in writing in accordance with this Section 3.03.

If, after the Election Forms have been mailed to Participating Former Securityholders, the Purchaser and the Company determine that the Effective Date is not reasonably likely to occur by the tenth Business Day after the Initial Election Deadline, then the Election Deadline shall be extended to a date which the Purchaser and the Company expect to be not more than ten Business Days before the Effective Date.

If the Election Deadline is extended, then the Company shall provide at least five days’ notice of the new Election Deadline (and shall provide such notice prior to the Initial Election Deadline if practicable) to Participating Former Securityholders by means of publication, at least once, in The Globe and Mail (national edition) or any other English language daily newspaper of general circulation in Canada.

Any duly completed Election Form deposited by the Initial Election Deadline shall not be required to be re-deposited if the Election Deadline is extended pursuant to this Section 3.03.

Not less than 21 days prior to the Initial Election Deadline, the Company shall send or cause to be sent (i) a Letter of Transmittal to each holder of record of Company Shares, and (ii) an Option/RSU Election Form to each Company Optionholder and Company RSU Holder.

a Participating Former Securityholder shall make such election by depositing with the Depositary by the Election Deadline:

the applicable irrevocable Election Form(s) duly signed and completed in accordance with the provisions thereof, indicating such Participating Former Securityholder’s election; and

if applicable, the certificates representing such Participating Former Securityholder’s Company Shares;

any Election Form, once so deposited with the Depositary, shall be irrevocable and may not be withdrawn by the Participating Former Securityholder;

a Participating Former Securityholder who does not deposit with the Depositary the applicable Election Form(s) duly completed, together with any certificates representing such Participating Former Securityholder’s Company Shares, prior to the Election Deadline, or who otherwise fails to fully comply with the requirements of Section 3.03 and this Section 3.04 (including any Participating Former Securityholder who attempts to exercise but does not validly exercise Dissent Rights), shall be deemed to have elected to receive the Combination Consideration in respect of all such Participating Former Securityholder’s Company Shares;

any deposit of an Election Form, and any accompanying certificates may be made at any of the addresses of the Depositary specified in the Election Form; and

a Company Shareholder who holds Company Shares as a nominee, custodian, depositary, trustee or in any other representative capacity for beneficial owners of Company Shares may submit a separate Election Form for each beneficial owner of such Company Shares.

Following the receipt of the Final Order and no later than one Business Day prior to the Effective Date:

the Purchaser and Acquireco shall deliver or arrange to be delivered to the Depositary (A) the Maximum Cash Consideration and (B) certificates representing the Maximum Purchaser Shares, which Maximum Cash Consideration and certificates shall be held by the Depositary as agent and nominee for such Participating Former Securityholders for distribution to such Participating Former Securityholders in accordance with the provisions of Article 5;

the Purchaser shall deliver or arrange to be delivered to the Depositary cash in an amount sufficient to pay the Purchaser Spinco Subscription Amount, which cash shall be held by the Depositary as agent and nominee for Spinco for distribution to Spinco in accordance with the provisions of Section 3.02(y);

Spinco shall deliver or arrange to be delivered to the Depositary certificates representing the Spinco Shares required to be delivered to Participating Former Securityholders pursuant to Section 3.02 (after giving effect to the Spinco Share Consolidation), which certificates shall be held by the Depositary as agent and nominee for such Participating Former Securityholders for distribution to such Participating Former Securityholders in accordance with the provisions of Article 5; and

Spinco shall deliver or arrange to be delivered to the Depositary certificates representing the Purchaser Spinco Shares, which certificates shall be held by the Depositary as agent and nominee for the Purchaser for distribution to the Purchaser in accordance with the provisions of Section 3.02(y);

Subject to the provisions of Section 3.06 and Article 5, on the Effective Date the Participating Former Securityholders shall be entitled to receive delivery of the cash and share certificates comprising the Arrangement Consideration to which they are entitled pursuant to Section 3.02.

are ultimately entitled to be paid fair value for their Company Shares (which fair value shall be the fair value of such shares immediately before the passing by the Affected Securityholders of the Arrangement Resolution) shall be paid an amount in cash equal to such fair value by the Company (including any successor or successors to the Company by amalgamation); and

are ultimately not entitled, for any reason, to be paid fair value for their Company Shares shall be deemed to have participated in the Arrangement, as of the Effective Time, on the same basis as a non-dissenting Company Shareholder who validly elected to receive the Combination Consideration in respect of all of their Company Shares,

On the Effective Date, each Participating Former Securityholder shall be entitled to receive, and the Depositary shall, provided such Participating Former Securityholder has otherwise complied with this Article 5, deliver to such Participating Former Securityholder, following the Effective Time, the Arrangement Consideration that such Former Securityholder is entitled to receive in accordance with Section 3.02 and Section 3.06.

Upon surrender to the Depositary for cancellation of a certificate that immediately before the Effective Time represented one or more outstanding Company Shares that were exchanged for Class A Shares and Spinco Shares in accordance with Section 3.02, together with such other documents and instruments as would have been required to effect the transfer of the Company Shares formerly represented by such certificate under the terms of such certificate, the BCBCA or the articles of the Company, and such additional documents and instruments as the Depositary may reasonably require, the holder of such surrendered certificate shall be entitled to receive in exchange therefor, and the Depositary shall deliver to such holder following the Effective Time, the Arrangement Consideration that such holder is entitled to receive in accordance with Section 3.02 and Section 3.06.

After the Effective Time and until surrendered for cancellation as contemplated by Section 5.01(b) hereof, each certificate that immediately prior to the Effective Time represented one or more Company Shares shall, following completion of the transactions described in Section 3.02, be deemed at all times to represent only the right to receive in exchange therefor the Arrangement Consideration that the holder of such certificate is entitled to receive in accordance with Section 3.02.

The Purchaser and the Company reserve the right to amend, modify or supplement this Plan of Arrangement at any time and from time to time, provided that each such amendment, modification or supplement must be (i) set out in writing, (ii) agreed to in writing by the Purchaser and the Company, (iii) filed with the Court and, if made following the Company Meeting, approved by the Court, and (iv) communicated to Affected Securityholders if and as required by the Court.

Any amendment, modification or supplement to this Plan of Arrangement may be proposed by the Company at any time prior to the Company Meeting provided that the Purchaser shall have consented thereto in writing, with or without any other prior notice or communication, and, if so proposed and accepted by the persons voting at the Company Meeting (other than as may be required under the Interim Order), shall become part of this Plan of Arrangement for all purposes.

Any amendment, modification or supplement to this Plan of Arrangement that is approved by the Court following the Company Meeting shall be effective only if: (i) it is consented to in writing by each of the Purchaser and the Company; and (ii) if required by the Court, it is consented to by the Affected Securityholders voting in the manner directed by the Court.

Dividends: The holders of the Class A Shares are entitled to receive dividends, if, as and when declared by the board of directors of the Company out of the assets of the Company properly applicable to the payment of dividends in such amounts and payable at such times and at such place or places in Canada as the board of directors of the Company may from time-to-time determine. Subject to the rights of the holders of any other class of shares of the Company entitled to receive dividends in priority to or rateably with the Class A Shares, the board of directors of the Company may in its sole discretion declare dividends on the Class A Shares to the exclusion of any other class of shares of the Company;

Voting Rights: The holders of the Class A Shares are entitled to receive notice of and to attend all annual and special meetings of the shareholders of the Company, and to two votes at all such meetings in respect of each Class A Share held;

Participation upon Liquidation, Dissolution or Winding-Up: In the event of the liquidation, dissolution or winding-up of the Company or other distribution of assets of the Company among its shareholders for the purpose of winding-up its affairs, the holders of the Class A Shares shall, subject to the rights of the holders of any other class of shares of the Company upon such a distribution in priority to the Class A Shares, be entitled to participate rateably in any distribution of the assets of the Company; and

Modification of Rights: The rights and restrictions attached to the Class A Shares shall not be modified unless the holders of the Class A Shares consent thereto by separate resolution. Such consent may be obtained in writing signed by the holders of all of the issued and outstanding Class A Shares or by a resolution passed by at least 75% of the votes cast at a separate meeting of the holders of Class A Shares who are present in person or represented by proxy at such meeting;