ARTICLE 1 INTERPRETATION

1.1

Defined Terms

1.2

Headings and References

1.3

Time Periods

1.4

Currency

1.5

Time

1.6

Construction

1.7

Governing Law

ARTICLE 2 THE ARRANGEMENT

2.1

The Arrangement

2.2

The Interim Order

2.3

U.S. Securities Laws Matters

2.4

The Special Meeting

2.5

Information Circular

2.6

Final Order

2.7

Court Proceedings

2.8

Zymeworks Incentive Awards & Warrants

2.9

Payment of Consideration

2.10

Withholding Taxes

ARTICLE 3 POST-ARRANGEMENT MATTERS

3.1

NYSE Listing

3.2

Post-Arrangement Transactions

ARTICLE 4 REPRESENTATIONS AND WARRANTIES

4.1

Organization and Qualification

4.2

Authority

4.3

No Violations

ARTICLE 5 COVENANTS

5.1

U.S. Tax Treatment

5.2

Section 85 Elections

5.3

Preparation of Registration Statement

5.4

Transaction Documents

5.5

Post-Arrangement Matters

ARTICLE 6 CONDITIONS TO CONSUMMATION OF THE REDOMICILE TRANSACTIONS

6.1

Conditions to the Obligations of the Parties

ARTICLE 7 TERMINATION

7.1

Termination

7.2

Effect of Termination

ARTICLE 8 MISCELLANEOUS

8.1

Entire Agreement & Assignment

8.2

Amendment

8.3

Notices

8.4

Severability

8.5

Counterparts & Electronic Signatures

unless the context otherwise requires, words importing the singular include the plural and vice versa and words denoting any gender include all genders;

the word “including” or “includes” shall mean “including (or includes) without limitation”; and

reference to a statute includes all rules and regulations made pursuant to such statute and, unless otherwise specified, the provisions of any statute or regulation or rule which amends, supplements or supersedes any such statute or any such regulation or rule.

for the classes of Persons to whom notice is to be provided in respect of the Arrangement and the Special Meeting, and for the manner in which such notice is to be provided;

that the required level of approval for the Redomicile Resolution shall be by: (i) the Zymeworks Shareholders by way of a special resolution passed by the Zymeworks Shareholders representing at least two-thirds of the votes cast by the Zymeworks Shareholders, in person or by proxy, at the Special Meeting, and (ii) the Zymeworks Securityholders, voting together as a single class, by way of special resolution passed by the Zymeworks Securityholders representing at least two-thirds of the votes cast by Zymeworks Securityholders, in person or by proxy, at the Special Meeting (collectively, the “Required Approval”);

that the Special Meeting may be adjourned or postponed from time to time by Zymeworks without the need for additional approval of the Court;

that, in all other respects, other than as ordered by the Court, the terms, restrictions and conditions of the Governing Documents of Zymeworks, including quorum requirements and all other matters, shall apply in respect of the Special Meeting;

confirmation of the record date for the purposes of determining the Zymeworks Securityholders entitled to receive material and vote at the Special Meeting in accordance with the Interim Order;

that the record date for the Zymeworks Securityholders entitled to notice of and to vote at the Special Meeting will not change in respect of any adjournments or postponements of the Special Meeting;

for the grant of the Dissent Rights to Zymeworks Shareholders as contemplated by the Plan of Arrangement;

that it is the intention of the Parent and ExchangeCo to rely upon Section 3(a)(10) of the U.S. Securities Act in connection with the issuance of Exchangeable Shares in accordance with the Arrangement, based on the Court’s approval of the Arrangement, which approval through the issuance of the Final Order will constitute its determination of the fairness of the Arrangement;

that the aggregate Designated Zymeworks Common Shares specified by Eligible Holders under the Letter of Transmittal and Election Forms for purposes of the Canadian Share Exchange shall be no greater than the Exchangeable Share Cap, allocated proportionately among Eligible Holders participating in the Canadian Share Exchange in accordance with the number of Designated Zymeworks Common Shares that they wish to designate, and in respect of each such Eligible Holder, rounded down to the nearest whole share;

for the notice requirements regarding the presentation of the application to the Court for the Final Order; and

for such other matters as Zymeworks may agree are reasonably necessary to complete the Redomicile Transactions.

the Court will be asked to approve the procedural and substantive fairness of the terms and conditions of the Arrangement;

in accordance with Section 2.2(h), prior to the issuance of the Interim Order, the Court will be advised of the intention of Parent and ExchangeCo to rely on the exemption provided by Section 3(a)(10) of the U.S. Securities Act with respect to the issuance of the Exchangeable Shares pursuant to the Arrangement, based on the Court’s approval of the Arrangement;

prior to the issuance of the Interim Order, Zymeworks will file with the Court a draft copy of the proposed text of the Information Circular together with any other documents required by Law in connection with the Special Meeting;

the Court will be advised prior to the hearing of the Court to give approval of the Arrangement that its approval of the Arrangement will be relied upon as a determination that the Court has satisfied itself as to the procedural and substantive fairness of the terms and conditions of the Arrangement to all Persons who are entitled to receive Exchangeable Shares pursuant to the Arrangement;

Zymeworks will ensure that each Zymeworks Shareholder and other Person entitled to receive Exchangeable Shares pursuant to the Arrangement will be given adequate and appropriate notice advising them of their right to attend the hearing of the Court to approve the procedural and substantive fairness of the terms and conditions of the Arrangement and providing them with sufficient information necessary for them to exercise that right;

the Final Order will expressly state that the Arrangement is approved by the Court as being procedurally and substantively fair to all Persons entitled to receive Exchangeable Shares pursuant to the Arrangement;

the Interim Order will specify that each Person entitled to receive Exchangeable Shares pursuant to the Arrangement will have the right to appear before the Court at the hearing of the Court to give approval of the Arrangement;

the Court will hold a hearing before approving the fairness of the terms and conditions of the Arrangement and issuing the Final Order; and

each Person entitled to receive Exchangeable Shares will be advised that the Exchangeable Shares issued pursuant to the Arrangement have not been registered under the U.S. Securities Act and will be issued in reliance on the exemption from registration under Section 3(a)(10) of the U.S. Securities Act and such Exchangeable Shares will include any appropriate legends.

are required to be deducted or withheld with respect to such payment or deemed payment under the Tax Act, the Code or any other applicable Laws (including any provision of federal, provincial, territorial, state, local, foreign or other Law relating to Taxes), in each case, as amended or succeeded. Parent, ExchangeCo, Zymeworks, the Depositary or any Other Withholding Agent may act and rely on the advice of counsel with respect to such matters.

To the extent that amounts are so deducted or withheld, such deducted or withheld amounts shall be treated for all purposes as having been paid to the Zymeworks Shareholder to whom such amounts would otherwise have been paid or deemed paid and such deducted or withheld amounts shall be timely remitted to the appropriate Governmental Entity as required by applicable Law.

To the extent that the amount so required to be deducted or withheld from any payment or deemed payment to a Zymeworks Shareholder exceeds any cash otherwise payable to the Zymeworks Shareholder (such difference, a “Withholding Shortfall”), Parent, ExchangeCo, Zymeworks, the Depositary or any Other Withholding Agent are hereby authorized to:

(A) sell or otherwise dispose of, or direct Parent, ExchangeCo, Zymeworks, the Depositary or any Other Withholding Agent to sell or otherwise dispose of, on their own account or through a broker (the “Broker”) and on behalf of the relevant Zymeworks Shareholder, or (B) require such Zymeworks Shareholder to irrevocably direct the sale through a Broker and irrevocably direct the Broker pay the proceeds of such sale to Parent, ExchangeCo, Zymeworks, the Depositary or any Other Withholding Agent, as appropriate (and, in the absence of such irrevocable direction, the holder shall be deemed to have provided such irrevocable direction), such portion of the amount or consideration as is necessary to provide sufficient funds (after deducting commissions payable to the Broker and other costs and expenses) to Parent, ExchangeCo, Zymeworks, the Depositary or any Other Withholding Agent, as the case may be, to enable it to comply with such deduction or withholding requirement and Parent, ExchangeCo, Zymeworks, the Depositary or any Other Withholding Agent, as the case may be, shall notify the Zymeworks Shareholder thereof and remit to such Zymeworks Shareholder any unapplied balance of the net proceeds of such sale, or

In the case of a Zymeworks Shareholder who is to receive Exchangeable Shares, require such Zymeworks Shareholder to deliver a Retraction Request for a number of Exchangeable Shares that would entitle such Zymeworks Shareholder to net proceeds greater than or equal to the Withholding Shortfall and withhold the Withholding Shortfall from such net proceeds and remit to such Zymeworks Shareholder any unapplied balance of the net proceeds.

Each of Parent, ExchangeCo, Zymeworks, the Depositary, any Other Withholding Agent or Broker, as applicable, shall act in a reasonable manner in respect of any withholding obligation; however, none of Parent, ExchangeCo, Zymeworks, the Depositary, any Other Withholding Agent or Broker, as applicable, will be liable for any loss arising out of any sale or other disposal of such consideration, including any loss relating to the manner or timing of such sale or other disposal, the prices at which the consideration is sold or otherwise disposed of or otherwise.

the authorized share structure of Zymeworks shall be reorganized to create an unlimited number of a new class of Common shares without par value, having special rights and restrictions that are substantially similar to the Zymeworks Common Shares, and in such form and substance as may be as determined by Zymeworks (the “New Common Shares”);

ExchangeCo shall exchange all of the Zymeworks Common Shares then held by ExchangeCo for New Common Shares of Zymeworks, on a one-for-one basis, pursuant to Section 86 of the Tax Act, and in such form and substance as may be as determined by Zymeworks;

Zymeworks shall reduce the capital on the Zymeworks Common Shares (which will then be held solely by Parent), by an amount equal to the fair market value of the ZBI Stock and the Irish Sub Stock, and in such manner and substance as Zymeworks may determine, and shall effect the same by way of a transfer of the ZBI Stock and the Irish Sub Stock from Zymeworks to Parent free and clear of all Liens, in such form and substance as Zymeworks may determine; and

Zymeworks shall surrender for cancellation, free and clear of all Liens and without a return of capital, the Delaware Common Stock held by Zymeworks.

the Redomicile Resolution shall have been approved by the Required Approval at the Special Meeting in accordance with the Interim Order;

the Interim Order and the Final Order shall have been obtained on terms substantially consistent with this Agreement and shall not have been set aside or modified in a manner unacceptable to Zymeworks, on appeal or otherwise;

no Order or Law issued by any court of competent jurisdiction or other Governmental Entity or other legal restraint or prohibition preventing the consummation of the Redomicile Transactions shall be in effect;

Zymeworks shall have obtained such other material consents as may be desirable or useful in connection with the consummation of the Redomicile Transactions, as determined by Zymeworks in its sole discretion;

the Registration Statement shall have become effective in accordance with the provisions of the U.S. Securities Act, no stop order shall have been issued by the SEC and shall remain in effect with respect to the Registration Statement, and no proceeding seeking such a stop order shall have been threatened or initiated by the SEC and remain pending; and

Dissent Rights shall not have been exercised for more than 10% of the Zymeworks Common Shares, or such other amount of Zymeworks Common Shares that, as determined by Zymeworks in its sole and unfettered discretion, it is no longer in the best interests of Zymeworks to proceed with the Redomicile Transactions.

If to Zymeworks, to:

If to Parent, to:

If to ExchangeCo or CallCo, to:

/s/ Kenneth Galbraith

/s/ Kenneth Galbraith

Definitions.

Headings and References.

Time Periods.

Currency.

Time.

Construction.

unless the context otherwise requires, words importing the singular include the plural and vice versa and words denoting any gender include all genders;

the word “including” or “includes” shall mean “including (or includes) without limitation”; and

reference to a statute includes all rules and regulations made pursuant to such statute and, unless otherwise specified, the provisions of any statute or regulation or rule which amends, supplements or supersedes any such statute or any such regulation or rule.

Governing Law.

Plan of Arrangement.

Effectiveness.

Arrangement.

Dissenting Shareholders. The outstanding Zymeworks Common Shares held by Dissenting Shareholders (the “Dissenting Common Shares”) shall be deemed to be transferred by the Holders thereof to Zymeworks, free and clear of all Liens, and cancelled in consideration for a debt claim against Zymeworks for the amount determined and payable in accordance with Article 5 (Rights of Dissent), and without any further authorization, act or formality by such Holders or Zymeworks, and:

such Dissenting Shareholders shall cease to be the holders of such Dissenting Common Shares and to have any rights as holders of such Dissenting Common Shares other than the right to be paid fair value by Zymeworks for such Dissenting Common Shares as set out in Article 5 (Rights of Dissent); and

the names of such Dissenting Shareholders shall be removed from the central securities register of Zymeworks Common Shares maintained by or on behalf of Zymeworks;

Non-Electing Zymeworks Common Shares. Subject to Section 3.4 (No Fractional Shares), each outstanding Zymeworks Common Share other than Zymeworks Common Shares held by (A) Dissenting Shareholders described in Section 3.1(a) (Dissenting Shareholders), and (B) Eligible Holders who have submitted a Letter of Transmittal and Election Form in accordance with Section 3.2 (Consideration Elections) (collectively, the “Non-Electing Zymeworks Common Shares”), shall be transferred by the Holders thereof to Parent, free and clear of all Liens, in exchange for an equal number of shares of Delaware Common Stock, such that one share of Delaware Common Stock shall be issued in exchange for each Non-Electing Zymeworks Common Share, and without any further authorization, act or formality by such Holders or Parent, and:

the Holders of such Non-Electing Zymeworks Common Shares shall cease to be the holders of such Non-Electing Zymeworks Common Shares and to have any rights as holders of such Non-Electing Zymeworks Common Shares other than the right to receive an equal number of shares of Delaware Common Stock in accordance with this Plan of Arrangement;

the names of the Holders of the Non-Electing Zymeworks Common Shares shall be removed from the central securities register for the Zymeworks Common Shares maintained by or on behalf of Zymeworks in respect of such Non-Electing Zymeworks Common Shares exchanged for Delaware Common Stock; and

Parent shall be deemed to be the legal and beneficial owner of such Non-Electing Zymeworks Common Shares so transferred, free and clear of all Liens, and shall be recorded as the registered Holder thereof on the central securities register for the Zymeworks Common Shares maintained by or on behalf of Zymeworks;

Electing Zymeworks Common Shares. Subject to Section 3.4 (No Fractional Shares), each outstanding Zymeworks Common Share held by or for the benefit of Eligible Holders who have submitted a Letter

of Transmittal and Election Form in accordance with Section 3.2 (Consideration Elections), shall be transferred by the Holders thereof to ExchangeCo, free and clear of all Liens, as follows: (A) subject to Section 3.1(d) (Exchangeable Share Exchange Cap), as to the Designated Zymeworks Common Shares, in exchange for an equal number of Exchangeable Shares, such that one Exchangeable Share shall be issued in exchange for each Designated Zymeworks Common Share, together with the benefit of the Support Agreement and the Voting and Exchange Trust Agreement to be executed and delivered under Section 3.1(g) (Documents Re Exchangeable Shares) (the “Contractual Rights”), and (B) as to the remaining Zymeworks Common Shares of the Eligible Holder that are not Designated Zymeworks Common Shares, in exchange for an equal number of shares of Delaware Common Stock, and in each case, without any further authorization, act or formality by such Holders or ExchangeCo, and

the Holders of such Zymeworks Common Shares shall cease to be the Holders of such Zymeworks Common Shares and to have any rights as Holders of such Zymeworks Common Shares other than the right to receive the Exchangeable Shares and Contractual Rights, and to the extent applicable the Delaware Common Stock, to which they are entitled as set forth above;

the names of the Holders of such Zymeworks Common Shares shall be removed from the central securities register for the Zymeworks Common Shares maintained by or on behalf of Zymeworks in respect of such Zymeworks Common Shares exchanged for Exchangeable Shares and to the extent applicable the Delaware Common Stock; and

ExchangeCo shall be deemed to be the legal and beneficial owner of such Zymeworks Common Shares so transferred, free and clear of all Liens, and shall be recorded as the registered Holder thereof on the central securities register for the Zymeworks Common Shares maintained by or on behalf of Zymeworks;

Exchangeable Share Exchange Cap. If the aggregate number of outstanding Zymeworks Common Shares specified as Designated Zymeworks Common Shares by Eligible Holders in their Letter of Transmittal and Election Forms submitted in accordance with Section 3.2 (Consideration Elections) exceed the Exchangeable Share Cap, then the following shall apply:

the number of outstanding Zymeworks Common Shares held by each such Eligible Holder that will be included as Designated Zymeworks Common Shares in the Canadian Share Exchange, and thereby exchanged for Exchangeable Shares on a one-for-one basis, shall be calculated based upon the following formula, but in each case, round down to the nearest whole share:

the number of Zymeworks Common Shares specified as Designated Zymeworks Common Shares in the Letter of Transmittal and Election Form of an Eligible Holder;

the aggregate number of Zymeworks Common Shares specified as Designated Zymeworks Common Shares in all of the Letter of Transmittal and Election Forms of the Eligible Holders;

the number of Zymeworks Common Shares comprising the Exchangeable Share Cap;

Exchangeable Shares. Exchangeable Shares issued under Section 3.1(c) (Electing Zymeworks Common Shares) shall be exchangeable for Delaware Common Stock or such other securities in accordance with the Exchangeable Share Provisions;

Special Voting Stock. Contemporaneously with the step contemplated in Section 3.1(c) (Electing Zymeworks Common Shares), (i) Parent will issue one share of the Special Voting Stock to the Share

Trustee, to be held by the Share Trustee under the terms and conditions of the Voting and Exchange Trust Agreement to be executed and delivered under Section 3.1(g) (Documents Re Exchangeable Shares), and (ii) Zymeworks will pay the subscription price for such Special Voting Stock to Parent on behalf of the prior Holders of the Designated Zymeworks Common Shares;

Documents Re Exchangeable Shares. Contemporaneously with the steps contemplated in Section 3.1(c) (Electing Zymeworks Common Shares) and Section 3.1(e) (Special Voting Stock), (i) Parent, ExchangeCo and CallCo shall execute the Support Agreement, (ii) Parent, ExchangeCo, CallCo and the Share Trustee shall execute the Voting and Exchange Trust Agreement, (iii) each such prior Holder of Designated Zymeworks Common Shares shall be deemed to have the rights granted to them as Beneficiaries under, and as defined in, the Voting and Exchange Trust Agreement in respect of the Special Voting Stock issued to the Share Trustee, and (iv) each such prior Holder of Designated Zymeworks Common Shares shall be deemed to have granted to CallCo the Liquidation Call Right, the Redemption Call Right, the Retraction Call Right and the Change of Law Call Right, each as defined in the Exchangeable Share Provisions;

Zymeworks Incentive Plan Amendments. The term “Change of Control” as defined in the Inducement Stock Option and Equity Compensation Plan and the Amended and Restated Stock Option and Equity Compensation Plan forming part of the Zymeworks Incentive Plans shall be, and be deemed to be, amended (without any further action of any person or party) to include any transaction, plan, scheme, reorganization or arrangement whereby Parent acquires, directly or indirectly, greater than 50% of the Zymeworks Common Shares, and if such is the case, Parent shall be a successor to Zymeworks under such plans. These amendments will allow Parent to assume the obligations under such plans and issue the Parent common stock under such plans.

Zymeworks Incentive Awards & Plans. Zymeworks shall assign to Parent, and Parent shall assume, all of Zymeworks’ rights and obligations under the Zymeworks Incentive Plans and all Zymeworks Incentive Awards granted thereunder as a successor to Zymeworks thereunder, and without any further authorization, act or formality by Parent, Zymeworks or the Holders of the Zymeworks Incentive Awards, and consistent with the terms of the Zymeworks Incentive Plans and the Zymeworks Incentive Awards:

each Zymeworks Incentive Award outstanding immediately prior to the Arrangement Effective Time shall be, and shall be deemed to be, exchanged for a Parent Incentive Award identical to such Zymeworks Incentive Award in all material respects (and for greater certainty, in respect of Delaware Common Stock in the place and stead of Zymeworks Common Shares), and without any further action on the part of any Holder thereof, Zymeworks or Parent (and for greater certainty, the exchange of Zymeworks Incentive Awards that are stock options for Parent Incentive Awards that are stock options shall meet the conditions of subsection 7(1.4) of the Tax Act), section 422 of the Code, or section 409A of the Code, as applicable;

the Holders of such Zymeworks Incentive Awards shall cease to be Holders of such Zymeworks Incentive Awards and to have any rights as Holders of such Zymeworks Incentive Awards, and such Holders’ names shall be removed as the Holders from the register or records maintained by or on behalf of Zymeworks and such Holders’ names shall be added as the holders of Parent Incentive Awards in the register or records of Parent Incentive Awards maintained by or on behalf of Parent; and

the Zymeworks Incentive Plans, and any award or grant agreement or any other document evidencing ownership of, or a right to, a Zymeworks Incentive Award shall be assigned to, and be assumed by, Parent in their entirety as the Parent Incentive Plans and award and grant agreements or other documents evidencing ownership of rights to a Parent Incentive Award made thereunder (including by the issuance of awards and grants by Parent to replace such Zymeworks Incentive Awards), with such administrative and ancillary amendments necessary to give the intended effect to such plans, agreements and documents, and neither Zymeworks nor Parent shall have any

liabilities or obligations with respect to any Zymeworks Incentive Plan or such agreements or documents;

Zymeworks Warrants. Zymeworks shall assign to Parent, and Parent shall assume, all of Zymeworks’ rights and obligations under the Zymeworks Warrants, and in accordance with the provisions regarding “Fundamental Transactions” (as that term is defined in the Zymeworks Warrants), the Holders of the Zymeworks Warrants shall be entitled to receive Delaware Common Stock (instead of Zymeworks Common Shares) as Alternate Consideration (as that term is defined in the Zymeworks Warrants) in accordance with the terms of the Zymeworks Warrants, and without any further authorization, act or formality by Parent, Zymeworks or the Holders of the Zymeworks Warrants.

Consideration Elections.

subject to Section 3.4 (No Fractional Shares), each Zymeworks Shareholder who is an Eligible Holder may elect to receive Consideration Shares under this Plan of Arrangement in the form of Exchangeable Shares together with the Contractual Rights;

the election provided for in Section 3.2(a) (Consideration Elections) shall be made by a Zymeworks Shareholder who is an Eligible Holder by depositing with the Depositary, prior to the Election Deadline, a duly completed Letter of Transmittal and Election Form indicating such Zymeworks Shareholder’s election, together with the certificates representing their Designated Zymeworks Common Shares (or, if such Zymeworks Common Shares are held in book-entry or other uncertificated form, upon the entry through a book-entry transfer agent of the surrender of such Zymeworks Common Shares on a book-entry account statement, it being understood that any reference herein to “certificates” shall be deemed to include references to book-entry account statements relating to the ownership of Zymeworks Common Shares);

any Letter of Transmittal and Election Form, once deposited with the Depositary, shall be irrevocable and may not be withdrawn by a Zymeworks Shareholder; and

any Zymeworks Shareholder who does not deposit with the Depositary a duly completed Letter of Transmittal and Election Form (together with the certificates representing the Designated Zymeworks Common Shares, to the extent applicable) prior to the Election Deadline, or otherwise fails to comply with the requirements of this Section 3.2 (Consideration Elections) or of the Letter of Transmittal and Election Form, shall be deemed to have elected to receive Delaware Common Stock under Section 3.1(b) (Non-Electing Zymeworks Common Shares).

Tax Election.

No Fractional Shares.

Payment of Consideration.

Subject to this Section 4.1 (Payment of Consideration), at or prior to the Arrangement Effective Time, Parent and ExchangeCo shall deposit or cause to be deposited with the Depositary, for the benefit of each Zymeworks Shareholder, Delaware Common Stock and Exchangeable Shares to which each such Zymeworks Shareholder is entitled pursuant to Section 3.1 (Arrangement), as applicable, which Delaware Common Stock and Exchangeable Share Documents shall be held by the Depositary, following the Arrangement Effective Time, as agent and nominee for such former Zymeworks Shareholders for distribution to such former holders in accordance with the provisions of this Article 4 (Delivery of Consideration).

Upon surrender by a Zymeworks Shareholder to the Depositary of a certificate which immediately prior to the Arrangement Effective Time represented one or more Zymeworks Common Shares, together with a duly completed and executed Letter of Transmittal and Election Form (if applicable) and any other documents reasonably requested by Parent, ExchangeCo or the Depositary (or, if such Zymeworks Common Shares are held in book-entry or other uncertificated form, upon the entry through a book-entry transfer agent of the surrender of such Zymeworks Common Shares on a book-entry account statement, it being understood that any reference herein to “certificates” shall be deemed to include references to book-entry account statements relating to the ownership of Zymeworks Common Shares), the registered Holder of such surrendered certificate(s) of Zymeworks Common Shares shall be entitled to receive in exchange therefor, and the Depositary shall deliver to such Zymeworks Shareholder, as soon as practicable after the Arrangement Effective Time, the Consideration in the form of Consideration Shares that such Zymeworks Shareholder has the right to receive pursuant to Section 3.1(b) (Non-Electing Zymeworks Common Shares) or 3.1(c) (Electing Zymeworks Common Shares), as applicable, less any amounts withheld pursuant to Section 4.5 (Withholding Rights), and any certificate of Zymeworks Common Shares so surrendered shall forthwith be cancelled.

Until surrendered for cancellation as contemplated by this Section 4.1 (Payment of Consideration), each certificate that immediately prior to the Arrangement Effective Time represented one or more Zymeworks Common Shares (other than Zymeworks Common Shares held by Parent, ExchangeCo or

any of their respective subsidiaries or Affiliates) shall be deemed at all times after the Arrangement Effective Time to represent only the right to receive upon such surrender the Consideration that the holder of such certificate is entitled to receive in the manner contemplated by this Section 4.1 (Payment of Consideration), less any amounts withheld pursuant to Section 4.5 (Withholding Rights).

In the event of the surrender of a certificate of Zymeworks Common Shares that is not registered in the transfer records of Zymeworks under the name of the Person surrendering such certificate, the Consideration to which the registered Holder is entitled pursuant to Section 3.1 (Arrangement) shall be paid to such a transferee if such certificate is presented to the Depositary and such certificate is duly endorsed or is accompanied by all documents required to evidence and effect such transfer and to evidence to the satisfaction of Parent that (i) any applicable stock transfer Taxes or any other Taxes required by reason of such payments being made in a name other than the registered Holder have been paid or (ii) no such Taxes are payable.

Any portion of the amount deposited with the Depositary that remains unclaimed by the Holders and other eligible Persons in accordance with this Article 4 (Delivery of Consideration) following one year after the Arrangement Effective Time shall be delivered to Parent, and any Holder who has not previously complied with this Article 4 (Delivery of Consideration) shall thereafter look only to Parent for, and, subject to Section 4.4 (Extinction of Rights), Parent shall remain liable for payment of such Holder’s claim for payment under this Section 4.1 (Payment of Consideration).

No former Holder of Zymeworks Common Shares or Zymeworks Incentive Awards, or any Holder of Zymeworks Warrants, shall be entitled to receive any consideration with respect thereto other than the consideration to which such former Holder or Holder is entitled to receive pursuant to the Arrangement, as applicable. For greater certainty, except as specifically contemplated in this Plan of Arrangement, no such former Holder or Holder will be entitled to receive any interest, dividends, premium or other payment in connection therewith.

Distributions with respect to Un-Surrendered Certificates.

No dividends or other distributions declared or made after the Arrangement Effective Time with respect to Zymeworks Common Shares with a record date after the Arrangement Effective Time shall be delivered to the Holder of any un-surrendered certificate which immediately prior to the Arrangement Effective Time represented outstanding Zymeworks Common Shares that were transferred pursuant to Section 3.1 (Arrangement).

No dividends or other distributions declared or made after the Arrangement Effective Time with respect to Delaware Common Stock or Exchangeable Shares with a record date after the Arrangement Effective Time shall be delivered to the holder of any un-surrendered certificate that, immediately prior to the Arrangement Effective Time, represented outstanding Zymeworks Common Shares that were transferred pursuant to Section 3.1 (Arrangement) unless and until the holder of such certificate shall have complied with the provisions of Section 4.1 (Delivery of Consideration) or Section 4.3 (Lost Certificates). Subject to applicable Law and to Section 4.5 (Withholding Rights), at the time of such compliance, there shall, in addition to the delivery of Consideration to which such holder is thereby entitled, be delivered to such holder, without interest, the amount of the dividend or other distribution with a record date after the Arrangement Effective Time paid with respect to such Delaware Common Stock or Exchangeable Shares.

Lost Certificates.

Extinction of Rights

Withholding Rights.

Notwithstanding anything to the contrary contained in this Plan of Arrangement, each of Parent, ExchangeCo, CallCo, Zymeworks, the Depositary and any other Person that has any withholding obligation with respect to any amount paid or deemed paid under this Plan of Arrangement (any such Person, an “Other Withholding Agent”) shall be entitled to deduct and withhold or direct Parent, ExchangeCo, CallCo, Zymeworks, the Depositary or any Other Withholding Agent to deduct and withhold on their behalf, from any amount or consideration paid, deemed paid or otherwise deliverable to any Person under this Plan of Arrangement (an “Affected Person”) such amounts as are required to be deducted or withheld with respect to such payment or deemed payment under the Tax Act, the Code or any provision of any federal, provincial, territorial, state, local or other Tax Law (a “Withholding Obligation”). Parent, ExchangeCo, CallCo, Zymeworks, the Depositary or any Other Withholding Agent may act and rely on the advice of counsel with respect to such matters. To the extent that amounts are so deducted or withheld, such deducted or withheld amounts shall be treated for all purposes hereof as having been paid to the Affected Person to whom such amounts would otherwise have been paid or deemed paid, and such deducted or withheld amounts shall be timely remitted to the appropriate Governmental Entity as required by applicable Law.

Parent, ExchangeCo, CallCo, Zymeworks, the Depositary and any Other Withholding Agent shall also have the right to:

withhold and sell, or direct Parent, ExchangeCo, CallCo, Zymeworks, the Depositary or any Other Withholding Agent to deduct and withhold and sell on their behalf, on their own account or through a broker (the “Broker”), and on behalf of any Affected Person; or

require the Affected Person to irrevocably direct the sale through a Broker and irrevocably direct the Broker to pay the proceeds of such sale to Parent, ExchangeCo, CallCo, Zymeworks, the

Depositary or any Other Withholding Agent as appropriate (and, in the absence of such irrevocable direction, the Affected Person shall be deemed to have provided such irrevocable direction);

No Liens.

Paramountcy.

Shares Fully Paid.

Rights of Dissent.

are ultimately determined to be entitled to be paid by Zymeworks fair value for their Zymeworks Common Shares shall: (i) be deemed to have transferred such Zymeworks Common Shares (free and clear of all Liens) to Zymeworks in accordance with, and as of the time stipulated in, Section 3.1(a) (Dissenting Shareholders); (ii) in respect of such Zymeworks Common Shares, be deemed to not have participated in the transactions in Article 3 (The Arrangement) (other than Section 3.1(a) (Dissenting Shareholders)); (iii) be entitled to be paid, subject to Section 4.5 (Withholding Rights), the fair value of such Zymeworks Common Shares by Zymeworks, which fair value, notwithstanding anything to the contrary contained in the BCBCA, shall be determined as of the close of business on the day before the Redomicile Resolution was adopted at the Special Meeting; and (iv) not be entitled to any other payment or consideration, including any payment or consideration that would be payable under the Arrangement had such Holders not exercised their Dissent Rights in respect of such Zymeworks Common Shares; or

are ultimately determined not to be entitled, for any reason, to be paid by Zymeworks fair value for their Zymeworks Common Shares, shall be deemed to have participated in the Arrangement in respect of such Zymeworks Common Shares on the same basis and at the same time as a Holder of Zymeworks Common Shares that is not a Dissenting Shareholder and who did not deposit with the Depositary a duly completed Letter of Transmittal and Election Form prior to the Election Deadline (and shall be entitled to receive the Consideration Shares in the same manner as such Holders).

Recognition of Dissenting Shareholders.

In no case shall Zymeworks, ExchangeCo, Parent, the Depositary or any other Person be required to recognize such Dissenting Shareholders as registered or beneficial Holders of Zymeworks Common Shares in respect of which Dissent Rights are sought to be exercised after the time stipulated in Section 3.1(a) (Dissenting Shareholders), and the names of such Zymeworks Shareholders shall be deleted from the register of Holders of Zymeworks Common Shares, at the time stipulated in Section 3.1(a) (Dissenting Shareholders) and such Zymeworks Common Shares shall be deemed to be cancelled.

In addition to any other restrictions in the Interim Order or the BCBCA, none of the following shall be entitled to exercise Dissent Rights: (i) beneficial and not legal Holders of Zymeworks Common Shares; (ii) Holders of Zymeworks Incentive Awards, or (iii) the Holders of the Zymeworks Warrants (in each case, in their capacity as Holders of Zymeworks Incentive Awards or Zymeworks Warrants, as applicable); and (iv) any Person that has voted or instructed a proxy holder to vote such Zymeworks Common Shares in favor of the Redomicile Resolution .

Amendments.

Zymeworks reserves the right to amend, modify and/or supplement this Plan of Arrangement at any time and from time to time prior to the Arrangement Effective Time, provided that any such amendment, modification, and/or supplement must be (i) set out in writing, (ii) approved by Zymeworks, (iii) filed with the Court and, if made after the Special Meeting and adversely affects the economic interest of any Zymeworks Securityholder, approved by the Court subject to such conditions

as the Court may impose, and (iv) communicated to Zymeworks Securityholders if and as required by the Court or applicable Law.

Any amendment, modification and/or supplement to this Plan of Arrangement may be proposed by Zymeworks at any time prior to or at the Special Meeting, with or without any other prior notice or communication and, if so proposed and accepted by the Persons voting at the Special Meeting, shall become part of this Plan of Arrangement for all purposes.

Any amendment, modification and/or supplement to this Plan of Arrangement that is approved or directed by the Court following the Special Meeting shall be effective only if (i) it is consented to by Zymeworks, and (ii) if such consent is required by the Court, it is consented to by the Zymeworks Securityholders voting in the manner directed by the Court.

Any amendment, modification or supplement to this Plan of Arrangement may be made following the Special Meeting without filing such amendment, modification or supplement with the Court or seeking Court approval, provided that it concerns a matter which, in the reasonable opinion of Zymeworks, is of an administrative nature required to better give effect to the implementation of this Plan of Arrangement and is not adverse to the interest of any Holder of Zymeworks Common Shares, Zymeworks Incentive Awards or Zymeworks Warrants.

Termination.

Assurances.

The arrangement (the “Arrangement”) under Division 5 of Part 9 of the Business Corporations Act (British Columbia) (the “BCBCA”) involving Zymeworks Inc. (the “Company”), pursuant to the Transaction Agreement dated July 14, 2022 among Zymeworks Delaware Inc. (“Parent”), Zymeworks Callco ULC (“Callco”), Zymeworks Exchangeco Ltd. (“ExchangeCo”) and the Company, as amended, supplemented or otherwise modified from time to time in accordance with its terms (the “Transaction Agreement”), and as more particularly described and set forth in the accompanying proxy statement/prospectus of the Company (the “Proxy Statement/Prospectus”), and all transactions contemplated under the Arrangement (collectively, the “Redomicile Transactions”), are hereby authorized, approved and adopted.

The plan of arrangement involving the Company, as it has been or may be amended, modified or supplemented in accordance with the terms of the Transaction Agreement (the “Plan of Arrangement”), the full text of which is attached as Exhibit A to the Transaction Agreement, which Transaction Agreement is attached as Appendix B to the Proxy Statement/Prospectus, is hereby authorized, approved and adopted.

The Transaction Agreement and all transactions contemplated therein, including the actions of the officers and directors of the Company in approving the Redomicile Transactions and in executing and delivering the Transaction Agreement and any modifications, supplements or amendments thereto, and causing the performance by the Company of its obligations thereunder, are hereby ratified and approved.

The Company is hereby authorized to apply for a final order from the Supreme Court of British Columbia (the “Court”) to approve the Arrangement in accordance with and subject to the terms and conditions set forth in the Transaction Agreement and the Plan of Arrangement, as they may be, or may have been, modified, supplemented or amended.

Notwithstanding that this resolution has been passed (and the Arrangement adopted) by the Zymeworks Securityholders (as defined in the Proxy Statement/Prospectus) or that the Arrangement has been approved by the Court, the directors of the Company are hereby authorized and empowered without further notice to, or approval of, the Zymeworks Securityholders (i) to amend, modify or supplement the Transaction Agreement, or the Plan of Arrangement to the extent permitted by the Transaction Agreement, and (ii) subject to the terms of the Transaction Agreement, to terminate the Transaction Agreement and not proceed with the Arrangement and any related transactions, at any time prior to the Effective Time (as defined in the Transaction Agreement).

Any officer or director of the Company is hereby authorized and directed for and on behalf of the Company to execute or cause to be executed and to deliver or cause to be delivered, all such other documents and instruments and to perform or cause to be performed all such other acts and things as in such person’s opinion may be necessary or desirable to give full effect to the foregoing resolutions and the matters authorized thereby, such determination to be conclusively evidenced by the execution and delivery of such document, agreement or instrument or the doing of any such act or thing.

Any and all acts performed prior to the date of these resolutions by any director or officer of the Company, acting for and on behalf of the Company, that are within the authority conferred by the foregoing resolutions are hereby ratified, confirmed, approved, satisfied and adopted in all respects as the authorized acts and deeds of the Company.

In connection with a transaction agreement (the “Transaction Agreement”) dated July 14, 2022 among Parent, CallCo, ExchangeCo and Zymeworks Inc. (“Zymeworks”), ExchangeCo is to issue exchangeable shares (the “Exchangeable Shares”) to certain holders of common shares of Zymeworks pursuant to an arrangement under Division 5 of Part 9 of the Business Corporations Act (British Columbia) (the “Arrangement”) on the terms and conditions set out in the Plan of Arrangement (as defined in the Transaction Agreement).

Pursuant to the Transaction Agreement, Parent, CallCo and ExchangeCo are required to enter into an exchangeable share support agreement (the “Agreement”) substantially in the form of this Agreement.

each capitalized term used and not otherwise defined in this Agreement shall have the meaning ascribed thereto in the rights, privileges, restrictions and conditions (collectively, the “Exchangeable Share Provisions”) attaching to the Exchangeable Shares as set out in the articles of ExchangeCo, unless the context requires otherwise;

“Affiliate” means, with respect to any Person, any other Person who, directly or indirectly, controls, is controlled by, or is under common control with, such Person. For purposes of this definition, the term “control” (including the correlative terms “controlling”, “controlled by” and “under common control with”) means the possession, directly or indirectly, of the power to direct or cause the direction of the management and policies of a Person, whether through the ownership of voting securities, by contract or otherwise. For purposes of this Agreement, “Affiliate” does not include any stockholders of Parent (other than Zymeworks), or directors or executive officers of Zymeworks, Parent, ExchangeCo or CallCo; and

“Person” includes an individual, partnership, association, body corporate, trustee, executor, administrator, legal representative, government or any other entity, whether or not having legal status.

not take any action that will result in the declaration or payment of any dividend or make any other distribution on the Delaware Common Stock (other than pursuant to a Preferred Stock Rights Agreement, as that term is defined in the Exchangeable Share Provisions) unless:

ExchangeCo shall (A) simultaneously declare or pay, as the case may be, an equivalent dividend or other distribution economically equivalent thereto (as determined in accordance with the Exchangeable Share Provisions) on the Exchangeable Shares (an “Equivalent Dividend”), (B) in the case of a cash dividend or other distribution, receive sufficient money or other assets from Parent (through any intermediary entities) to enable the due declaration and the due and punctual payment, in accordance with applicable Law and the Exchangeable Share Provisions, of any such Equivalent Dividend, and (C) in the case of a dividend or other distribution that is a stock or share dividend or a distribution of stock or shares, have sufficient authorized but unissued securities available to enable the due declaration and the due and punctual payment, in accordance with applicable Law and the Exchangeable Share Provisions, of any such Equivalent Dividend; provided however, for the avoidance of doubt, that in no event may ExchangeCo elect to effect a dividend or other distribution that is a stock or share dividend or a distribution of stock or shares in the form of cash or property other than stock or shares; or

if the board of directors of ExchangeCo so chooses, in its sole discretion, as an alternative to taking any of the actions described in paragraph (i) above, ExchangeCo shall adjust the Exchangeable Share Exchange Ratio in accordance with the Exchangeable Share Provisions, provided however that the Exchangeable Share Exchange Ratio shall only be so adjusted to the extent that the board of directors of ExchangeCo determines in good faith and in its sole discretion that ExchangeCo would be liable for any unrecoverable tax as a result of taking any of the actions described in paragraph (i) above, and determines to adjust the Exchangeable Share Exchange Ratio in lieu of taking any such action;

advise ExchangeCo sufficiently in advance of the declaration by Parent of any dividend or other distribution on the Delaware Common Stock (other than pursuant to a Preferred Stock Rights Agreement, as that term is defined in the Exchangeable Share Provisions) and take all such other actions as are reasonably necessary or desirable, in co-operation with ExchangeCo, to ensure that the respective declaration date, record date and payment date for an Equivalent Dividend shall be the same as the declaration date, record date and payment date for the corresponding dividend or other distribution on the Delaware Common Stock;

take all such actions and do all such things as are reasonably necessary or desirable to enable and permit ExchangeCo, in accordance with applicable Law, to pay and otherwise perform its obligations

with respect to the satisfaction of the Liquidation Amount, the Retraction Price or the Redemption Price in respect of each issued and outstanding Exchangeable Share upon the liquidation, dissolution or winding-up of ExchangeCo, whether voluntary or involuntary, or any other distribution of the assets of ExchangeCo among its shareholders for the purpose of winding up its affairs, the delivery of a Retraction Request by a holder of Exchangeable Shares or a redemption of Exchangeable Shares by ExchangeCo, as the case may be, including without limitation all such actions and all such things as are necessary or desirable to enable and permit ExchangeCo to deliver or cause to be delivered Delaware Common Stock or other property to the holders of Exchangeable Shares in accordance with the provisions of Sections 26.5, 26.6 or 26.7, as the case may be, of the Exchangeable Share Provisions;

take all such actions and do all such things as are reasonably necessary or desirable to enable and permit the Share Trustee in accordance with applicable Law to perform its obligations under the Voting and Exchange Trust Agreement, including, without limitation, all such actions and all such things as are reasonably necessary or desirable to enable and permit the Share Trustee in its capacity as trustee under the Voting and Exchange Trust Agreement to exercise such number of votes in respect of a Parent Meeting or a Parent Consent (as such terms are defined in the Voting and Exchange Trust Agreement) as is equal to the aggregate number of Exchangeable Shares outstanding at the relevant time (other than those held by Parent and its Affiliates), multiplied by the Exchangeable Share Exchange Ratio, and rounded down to the nearest whole vote in respect of any one Beneficiary (as that term is defined in the Voting and Exchange Trust Agreement);

take all such actions and do all such things as are reasonably necessary or desirable to enable and permit CallCo, in accordance with applicable Law, to perform its obligations arising upon the exercise by it of the Liquidation Call Right, the Retraction Call Right, the Change of Law Call Right or the Redemption Call Right (or upon the exercise by the holder of the Exchangeable Shares of their right to require CallCo to exercise the Liquidation Call Right, the Retraction Call Right, the Change of Law Call Right or the Redemption Call Right), including without limitation all such actions and all such things as are necessary or desirable to enable and permit CallCo to deliver or cause to be delivered Delaware Common Stock or other property to the holders of Exchangeable Shares in accordance with the provisions of the Liquidation Call Right, the Retraction Call Right, the Change of Law Call Right or the Redemption Call Right, as the case may be;

take all such actions and do all such things as are reasonably necessary or desirable to enable and permit ExchangeCo in accordance with applicable Law, to perform its obligations in connection with a Retraction Request pursuant to Section 26.6 of the Exchangeable Share Provisions and the redemption by ExchangeCo pursuant to Section 26.7 of the Exchangeable Share Provisions, including without limitation all such actions and all such things as are necessary or desirable to enable and permit ExchangeCo to deliver or cause to be delivered Delaware Common Stock or other property to the holders of Exchangeable Shares in accordance with the provisions of Sections 26.6 or 26.7 of the Exchangeable Share Provisions; and

not, except as otherwise contemplated in the Exchangeable Shares Provisions: (i) exercise its vote as a shareholder of ExchangeCo to initiate the voluntary liquidation, dissolution or winding up of ExchangeCo or any other distribution of the assets of ExchangeCo among its shareholders for the purpose of winding up its affairs, or (ii) take any action or omit to take any action that is designed to result in the liquidation, dissolution or winding up of ExchangeCo or any other distribution of the assets of ExchangeCo among its shareholders for the purpose of winding up its affairs, without the approval of the holders of the Exchangeable Shares in accordance with the Exchangeable Share Provisions.

as is equal to the sum of (i) the number of Exchangeable Shares issued and outstanding from time to time multiplied by the Exchangeable Share Exchange Ratio, and (ii) the number of Exchangeable Shares issuable upon the exercise of all rights to acquire Exchangeable Shares outstanding from time to time multiplied by the Exchangeable Share Exchange Ratio; and

as are now and may hereafter be required to enable and permit each of Parent, CallCo and ExchangeCo to meet its obligations under the Voting and Exchange Trust Agreement, the Exchangeable Share Provisions and any other security or commitment relating to the Arrangement pursuant to which Parent may now or hereafter be required to issue or cause to be issued Delaware Common Stock.

in the event of any determination by the board of directors of ExchangeCo to institute voluntary liquidation, dissolution or winding-up proceedings with respect to ExchangeCo or to effect any other distribution of the assets of ExchangeCo among its shareholders for the purpose of winding up its affairs, at least 60 days prior to the proposed effective date of such liquidation, dissolution, winding-up or other distribution;

promptly upon the earlier of (i) receipt by ExchangeCo of notice of, and (ii) ExchangeCo otherwise becoming aware of, any threatened or instituted claim, suit, petition or other proceedings with respect to the involuntary liquidation, dissolution or winding-up of ExchangeCo or to effect any other distribution of the assets of ExchangeCo among its shareholders for the purpose of winding up its affairs;

immediately, upon receipt by ExchangeCo of a Retraction Request;

on the same date on which notice of redemption is given to holders of Exchangeable Shares, upon the determination of a Redemption Date in accordance with the Exchangeable Share Provisions;

as soon as practicable upon the issuance by ExchangeCo of any Exchangeable Shares or rights to acquire Exchangeable Shares (other than the issuance of Exchangeable Shares and rights to acquire Exchangeable Shares pursuant to the Arrangement); and

promptly, upon receiving notice of a Change of Law.

Parent covenants and agrees that it shall use commercially reasonable efforts to:

promptly file a prospectus supplement under a then existing and effective registration statement or a new registration statement (such prospectus supplement or new registration statement, the “Registration Statement”) on Form S-3 or, if Parent is not then eligible to use Form S-3, then such other form as Parent is then eligible to use, under the Securities Act of 1933, as amended (the “1933 Act”), to register the issuance of all shares of Delaware Common Stock to be issued or delivered to holders of the Exchangeable Shares (including, for greater certainty, pursuant to the Exchange Right or the Automatic Exchange Right as described in the Voting and Exchange Trust Agreement);

cause the Registration Statement to become effective as soon as reasonably practicable; and

cause the Registration Statement (or a successor registration statement) to remain effective at all times that any Exchangeable Shares remain outstanding.

Without limiting the generality of Section 2.6(1), Parent and CallCo each covenant and agree that it will take all such actions and do all such things as are reasonably necessary or desirable to make such filings and seek such regulatory consents and approvals as are necessary so that the Delaware Common Stock to be issued or delivered to holders of Exchangeable Shares by Parent or CallCo pursuant to the terms of the Exchangeable Share Provisions, the Voting and Exchange Trust Agreement and this Agreement will be offered, sold, issued and delivered in compliance with the 1933 Act and all applicable state securities laws, and applicable securities laws in Canada and will use commercially reasonable efforts to ensure that the Delaware Common Stock will not be subject to any hold period as contemplated by Rule 144 under the 1933 Act or subject to any “hold period” resale restriction under National Instrument 45-102 Resale of Securities. Parent will in good faith expeditiously take all such actions and do all such things as are reasonably necessary or desirable to cause all Delaware Common Stock to be delivered to holders of Exchangeable Shares pursuant to the terms of the Exchangeable Share Provisions, the Voting and Exchange Trust Agreement and this Agreement to be listed, quoted and posted for trading on all stock exchanges and quotation systems on which outstanding Delaware Common Stock have been listed by Parent and remain listed and are quoted or posted for trading at such time.

Notwithstanding any other provision of the Exchangeable Share Provisions, or any term of this Agreement, the Voting and Exchange Trust Agreement or the Plan of Arrangement, no Delaware Common Stock shall be issued (and Parent will not be required to issue any Delaware Common Stock) in connection with any liquidation, dissolution or winding-up of ExchangeCo, or any retraction, redemption or any other exchange, direct or indirect, of Exchangeable Shares, if such issuance of Delaware Common Stock would not be permitted by applicable Laws.

So long as any Exchangeable Shares not owned by Parent or its Affiliates are outstanding:

Parent shall not without the prior approval of ExchangeCo and the prior approval of the holders of the Exchangeable Shares given in accordance with Section 26.11(b) of the Exchangeable Share Provisions:

issue or distribute Delaware Common Stock (or securities exchangeable for or convertible into or carrying rights to acquire Delaware Common Stock) to the holders of all or substantially all of the then outstanding Delaware Common Stock by way of stock or share dividend or other distribution, other than an issue of Delaware Common Stock (or securities exchangeable for or convertible into or carrying rights to acquire Delaware Common Stock) to holders of Delaware Common Stock (A) who exercise an option to receive dividends in Delaware Common Stock (or securities

exchangeable for or convertible into or carrying rights to acquire Delaware Common Stock) in lieu of receiving cash dividends, (B) pursuant to any dividend reinvestment plan or scrip dividend or similar arrangement, or (C) pursuant to a Preferred Stock Rights Agreement, as that term is defined in the Exchangeable Share Provisions; or

issue or distribute rights, options or warrants to the holders of all or substantially all of the then outstanding Delaware Common Stock entitling them to subscribe for or to purchase Delaware Common Stock or securities exchangeable for or convertible into or carrying rights to acquire Delaware Common Stock (other than pursuant to a Preferred Stock Rights Agreement, as that term is defined in the Exchangeable Share Provisions); or

issue or distribute to the holders of all or substantially all of the then outstanding Delaware Common Stock (A) shares or securities of Parent of any class other than Delaware Common Stock (or securities convertible into or exchangeable for or carrying rights to acquire Delaware Common Stock), (B) rights, options, warrants or other assets other than those referred to in Section 2.7(1)(a)(ii), (C) evidence of indebtedness of Parent, or (D) assets of Parent, except pursuant to a Preferred Stock Rights Agreement, as that term is defined in the Exchangeable Share Provisions;

Parent shall not without the prior approval of ExchangeCo and the prior approval of the holders of the Exchangeable Shares given in accordance with Section 26.11(b) of the Exchangeable Share Provisions:

subdivide, redivide or change the then outstanding Delaware Common Stock into a greater number of Delaware Common Stock; or

reduce, combine, consolidate or change the then outstanding Delaware Common Stock into a lesser number of Delaware Common Stock; or

reclassify or otherwise change the Delaware Common Stock or effect an amalgamation, merger, combination, reorganization or other transaction affecting the Delaware Common Stock;

The board of directors of ExchangeCo shall determine, in good faith and in its sole discretion (with the assistance of such financial or other advisors as the board of may determine), “economic equivalence” for the purposes of any event referred to in Section 2.7(1)(a) or Section 2.7(1)(b) and each such determination shall be conclusive and binding on Parent. In making each such determination, the following factors shall, without excluding other factors determined by the board of directors of ExchangeCo to be relevant, be considered by the board of directors of ExchangeCo:

in the case of any stock or share dividend or other distribution payable in Delaware Common Stock, the number of such shares issued as a result of such stock or share dividend or other distribution in proportion to the number of Delaware Common Stock previously outstanding;

in the case of the issuance or distribution of any rights, options or warrants to subscribe for or purchase Delaware Common Stock (or securities exchangeable for or convertible into or carrying rights to acquire Delaware Common Stock), the relationship between the exercise price of each such right, option or warrant, the number of such rights, options or warrants to be issued or distributed in respect of each Delaware Common Stock and the Current Market Price of a Delaware Common Stock, the price volatility of the Delaware Common Stock and the terms of any such instrument;

in the case of the issuance or distribution of any other form of property (including without limitation any shares or securities of Parent of any class other than Delaware Common Stock, any rights, options or warrants other than those referred to in Section 2.7(2)(b), any evidences of indebtedness of Parent or any assets of Parent), the relationship between the fair market value (as determined by the board of directors of ExchangeCo in the manner above contemplated) of such property to be issued or distributed with respect to each outstanding Delaware Common Stock and the Current Market Price of the Delaware Common Stock;

in the case of any subdivision, redivision or change of the then outstanding Delaware Common Stock into a greater number of Delaware Common Stock or the reduction, combination, consolidation or change of the then outstanding Delaware Common Stock into a lesser number of Delaware Common Stock or any amalgamation, merger, combination, arrangement, reorganization or other transaction affecting Delaware Common Stock, the effect thereof upon the then outstanding Delaware Common Stock; and

in all such cases, the general taxation consequences of the relevant event to holders of Exchangeable Shares to the extent that such consequences may differ from the taxation consequences to holders of Delaware Common Stock as a result of differences between taxation Laws of Canada and the United States (except for any differing consequences arising as a result of differing marginal taxation rates and without regard to the individual circumstances of holders of Exchangeable Shares).

ExchangeCo agrees that, to the extent required, upon due notice from Parent, ExchangeCo shall use commercially reasonable efforts to take or cause to be taken such steps as may be necessary for the purposes of ensuring that appropriate dividends are paid or other distributions are made by ExchangeCo, or the Exchangeable Share Exchange Ratio is adjusted, or subdivisions, redivisions or changes are made to the Exchangeable Shares, as applicable, in order to implement the required economic equivalence with respect to the Delaware Common Stock and Exchangeable Shares as provided for in this Section 2.7.

such other Person or continuing corporation (the “Parent Successor”) by operation of Law, becomes bound by the terms and provisions of this Agreement or, if not so bound, executes, prior to or contemporaneously with the consummation of such transaction, an agreement supplemental hereto and

such other instruments (if any) as are necessary or advisable to evidence the assumption by the Parent Successor of liability for all moneys payable and property deliverable hereunder and the covenant of such Parent Successor to pay and deliver or cause to be paid and delivered the same and its agreement to observe and perform all the covenants and obligations of Parent under this Agreement; and

such transaction shall be upon such terms and conditions as to preserve and not to impair any of the rights, duties, powers and authorities of the other parties hereunder or the holders of the Exchangeable Shares.

in which Parent merges, combines or amalgamates with, or in which all or substantially all of the then outstanding Delaware Common Stock are acquired by, one or more other corporations to which Parent is, immediately before such merger, combination, amalgamation or acquisition, “related” within the meaning of the Income Tax Act (Canada) (otherwise than by virtue of a right referred to in paragraph 251(5)(b) thereof);

which does not result in an acceleration of the Redemption Date in accordance with paragraph (ii) of the definition of Redemption Date in the Exchangeable Share Provisions; and

in which all or substantially all of the then outstanding Delaware Common Stock are converted into or exchanged for shares or rights to receive such shares (the “Other Shares”) or another corporation (the “Other Corporation”) that, immediately after such Parent Control Transaction, owns or controls, directly or indirectly, Parent;

adding to the covenants of any or all of the parties hereto if the board of directors of each of Parent, CallCo and ExchangeCo shall be of the good faith opinion that such additions will not be prejudicial to the rights or interests of the holders of the Exchangeable Shares;

evidencing the succession of Parent Successors and the covenants of and obligations assumed by each such Parent Successor in accordance with the provisions of Article 3;

making such amendments or modifications not inconsistent with this Agreement as may be necessary or desirable with respect to matters or questions arising hereunder which, in the good faith opinion of the board of directors of each of Parent, CallCo and ExchangeCo, it may be expedient to make, provided that each such board of directors shall be of the good faith opinion, after consultation with counsel, that such amendments or modifications will not be prejudicial to the rights or interests of the holders of the Exchangeable Shares; or

making such changes or corrections hereto which, on the advice of counsel to Parent, CallCo and ExchangeCo, are required for the purpose of curing or correcting any ambiguity or defect or inconsistent provision or clerical omission or mistake or manifest error contained herein, provided that the boards of directors of each of Parent, CallCo and ExchangeCo shall be of the good faith opinion that such changes or corrections will not be prejudicial to the rights or interests of the holders of the Exchangeable Shares.

In the case of Parent, at the following address:

In the case of CallCo or ExchangeCo, at the following address:

In connection with a transaction agreement (the “Transaction Agreement”) dated July 14, 2022 among Parent, CallCo, ExchangeCo and Zymeworks Inc. (“Zymeworks”), ExchangeCo is to issue exchangeable shares (the “Exchangeable Shares”) to certain holders of common shares of Zymeworks pursuant to an arrangement under Division 5 of Part 9 of the Business Corporations Act (British Columbia) on the terms and conditions set out in the Plan of Arrangement (as defined in the Transaction Agreement).

Pursuant to the Transaction Agreement, Parent, CallCo, ExchangeCo and the Share Trustee are required to enter into a voting and exchange trust agreement substantially in the form of this Agreement.

These recitals and any statements of fact in this Agreement are made by Parent, CallCo, and ExchangeCo and not by the Share Trustee.

Definitions

Interpretation Not Affected by Headings

Number, Gender, etc.

Date for any Action

Currency

Statutes

Exhibits

Establishment of Trust

Issue and Ownership of the Special Voting Stock

the Share Trustee shall hold the Special Voting Stock and the legal title thereto as Share Trustee solely for the use and benefit of the Beneficiaries in accordance with the provisions of this Agreement; and

except as specifically authorized by this Agreement, the Share Trustee shall have no power or authority to sell, transfer, vote or otherwise deal in or with the Special Voting Stock and the Special Voting Stock shall not be used or disposed of by the Share Trustee for any purpose (including for exercising dissent or appraisal rights relating to the Special Voting Stock) other than the purposes for which this Trust is created pursuant to this Agreement.

Legended Non-Transferable Acknowledgements

Safe Keeping of Certificate

Voting Rights

the Share Trustee shall exercise the Voting Rights only on the basis of instructions received pursuant to this Article 4 from Beneficiaries on the record date established by Parent or by applicable law for such Parent Meeting or Parent Consent who are entitled to instruct the Share Trustee as to the voting thereof;

to the extent that no instructions are received from a Beneficiary with respect to the Voting Rights in respect of which such Beneficiary is entitled to instruct the Share Trustee, the Share Trustee shall not exercise or permit the exercise of such Voting Rights; and

without prejudice to paragraph (b) above, under no circumstances shall the Share Trustee exercise or permit the exercise of a number of Voting Rights which is greater than the number of Exchangeable Shares outstanding at the relevant time multiplied by the Exchangeable Share Exchange Ratio.

Number of Votes

Mailings to Stockholders

With respect to each Parent Meeting or Parent Consent, the Share Trustee will mail or cause to be mailed or delivered via electronic transmission in a manner contemplated by Section 232 of the Delaware General Corporation Law (or otherwise communicate in the same manner as Parent utilizes in communications to holders of Delaware Common Stock, including without limitation in accordance with the notice and access rules promulgated by the U.S. Securities and Exchange Commission (“SEC”), subject to applicable regulatory requirements and to the Share Trustee being advised in writing of such manner of communications and provided that such manner of communications is reasonably available to the Share Trustee) to each Beneficiary named in the applicable List on the same day as the mailing (or other communication) with respect thereto is commenced by Parent to its stockholders:

a copy of such mailing or other notice, together with any related materials, including, without limitation, any proxy statement or notice of internet availability of proxy materials, to be provided to stockholders of Parent;

a statement that such Beneficiary is entitled to instruct the Share Trustee as to the exercise of the Beneficiary Votes with respect to such Parent Meeting or Parent Consent or, pursuant to Section 4.7, to attend such Parent Meeting and to exercise personally the Beneficiary Votes thereat;

a statement as to the manner in which such instructions may be given to the Share Trustee, including an express indication that instructions may be given to the Share Trustee to give (A) a proxy to such Beneficiary or his, her or its designee to exercise personally such holder’s Beneficiary Votes, or (B) a proxy to a designated agent or other representative of Parent to exercise such holder’s Beneficiary Votes;

a statement that if no such instructions are received from such Beneficiary, the Beneficiary Votes to which the Beneficiary is entitled will not be exercised;

a form of direction such Beneficiary may use to direct and instruct the Share Trustee as contemplated herein; and

a statement of (A) the time and date by which such instructions must be received by the Share Trustee in order for such instructions to be binding upon the Share Trustee, which in the case of a Parent Meeting shall not be earlier than the close of business on the Business Day immediately prior to the date by which Parent has required proxies to be deposited for such meeting, and (B) of the method for revoking or amending such instructions.

The materials referred to in this Section 4.3 shall be provided to the Share Trustee by Parent, and the materials referred to in Sections 4.3(1)(b), 4.3(1)(c), 4.3(1)(d), 4.3(1)(e) and 4.3(1)(f) shall (if reasonably practicable to do so) be subject to reasonable comment by the Share Trustee in a timely manner. Subject to the foregoing, Parent shall ensure that the materials to be provided to the Share Trustee are provided in sufficient time to permit the Share Trustee to comment as aforesaid and to send all materials to each Beneficiary at the same time as such materials are first sent to holders of Delaware Common Stock. Parent

agrees not to communicate with holders of Delaware Common Stock with respect to the materials referred to in this Section 4.3 otherwise than by mail unless such method of communication is also reasonably available to the Share Trustee for communication with the Beneficiaries. Notwithstanding the foregoing, Parent may, at its option, exercise the duties of the Share Trustee to deliver copies of all materials to all Beneficiaries as required by this Section 4.3 so long as, in each case, Parent delivers a certificate to the Share Trustee stating that Parent has undertaken to perform the obligations of the Share Trustee set forth in this Section 4.3.

For the purpose of determining the number of Beneficiary Votes to which a Beneficiary is entitled in respect of any Parent Meeting or Parent Consent, the number of Exchangeable Shares owned of record by the Beneficiary shall be determined at the close of business on the record date established by Parent or by applicable law for purposes of determining stockholders entitled to vote at such Parent Meeting or in respect of such Parent Consent, which number of Beneficiary Votes shall be as set forth in the List. Parent shall notify the Share Trustee of any decision of the board of directors of Parent with respect to the calling of any Parent Meeting or any Parent Consent and shall provide all necessary information, including a certificate executed by a duly authorized officer of Parent confirming the applicable number of votes attributable to each outstanding Exchangeable Share as of the applicable record date, and materials to the Share Trustee in each case promptly and, in any event, in sufficient time to enable the Share Trustee to perform the obligations of the Share Trustee set forth in this Section 4.3.

Copies of Stockholder Information

received by the Share Trustee as the registered holder of the Special Voting Stock and made available by Parent generally to the holders of Delaware Common Stock; or

specifically directed to the Beneficiaries or to the Share Trustee for the benefit of the Beneficiaries by Parent.

Other Materials

List of Persons Entitled to Vote

Entitlement to Direct Votes

Voting by Share Trustee and Attendance of Share Trustee Representative at Meeting

In connection with each Parent Meeting and Parent Consent, the Share Trustee shall exercise, either in person or by proxy, in accordance with the instructions received from a Beneficiary pursuant to Section 4.2 and in the form required under Section 4.3(1)(e), the Beneficiary Votes as to which such Beneficiary is entitled to direct the vote (or any lesser number thereof as may be set forth in the instructions) other than any Beneficiary Votes that are the subject of Section 4.8(2); provided, however, that such written instructions are received by the Share Trustee from the Beneficiary prior to the time and date fixed by the Share Trustee for receipt of such instruction in the notice given by the Share Trustee to the Beneficiary pursuant to Section 4.3.

To the extent so instructed in accordance with the terms of this Agreement, the Share Trustee shall cause a representative who is empowered by it to sign and deliver, on behalf of the Share Trustee, proxies for Voting Rights enabling a Beneficiary to attend a Parent Meeting. Upon submission by a Beneficiary (or its designee) named in the List prepared in connection with the relevant meeting of identification satisfactory to the Share Trustee’s representative, and at the Beneficiary’s request, such representative shall sign and deliver to such Beneficiary (or its designee) a proxy to exercise personally the Beneficiary Votes as to which such Beneficiary is otherwise entitled hereunder to direct the vote, if such Beneficiary either (i) has not previously given the Share Trustee instructions pursuant to Section 4.3 in respect of such meeting or (ii) submits to such representative written revocation of any such previous instructions. At such meeting, the Beneficiary (or its designee) exercising such Beneficiary Votes in accordance with such proxy shall have the same rights in respect of such Beneficiary Votes as the Share Trustee to speak at the meeting in favour of any matter, question, proposal or proposition, to vote by way of ballot at the meeting in respect of any matter, question, proposal or proposition, and to vote at such meeting in respect of any matter, question, proposal or proposition.

Distribution of Written Materials

Termination of Voting Rights

the delivery by such holder to the Share Trustee of the Exchangeable Share Documents representing such Exchangeable Shares in connection with the exercise by the Beneficiary of the Exchange Right;

the occurrence of the automatic exchange of Exchangeable Shares for Delaware Common Stock, as specified in Article 5 (unless Parent shall not have delivered the requisite Delaware Common Stock deliverable in exchange therefor to the Share Trustee pending delivery to the Beneficiaries);

the retraction or redemption of such Exchangeable Shares pursuant to Section 26.6 or 26.7 of the Exchangeable Share Provisions;

the effective date of the liquidation, dissolution or winding-up of ExchangeCo or any other distribution of the assets of ExchangeCo among its stockholders for the purpose of winding up its affairs pursuant to Section 26.5 of the Exchangeable Share Provisions; or

the purchase of such Exchangeable Shares from the holder thereof by CallCo pursuant to the exercise by CallCo of the Liquidation Call Right, the Redemption Call Right, the Change of Law Call Right or the Retraction Call Right (unless, in any case, CallCo shall not have delivered the requisite consideration deliverable in exchange therefor).

Disclosure of Interest in Exchangeable Shares

Grant and Ownership of the Exchange Right and Automatic Exchange Right

Parent and, in the case of the Exchange Right, CallCo hereby grant to the Share Trustee as Share Trustee for and on behalf of, and for the use and benefit of, the Beneficiaries (i) the right (the “Exchange Right”), upon the occurrence and during the continuance of an Insolvency Event, to require CallCo or Parent (provided that Parent may, in its sole discretion, cause CallCo to purchase in its place and stead to the extent permissible by applicable law) to purchase from each or any Beneficiary all or any part of the Exchangeable Shares held by such Beneficiary, all in accordance with the provisions of this Agreement, and (ii) the Automatic Exchange Right. Each of Parent and CallCo hereby acknowledges receipt from the Share Trustee as Share Trustee for and on behalf of the Beneficiaries of good and valuable consideration (and the adequacy thereof) for the grant of the Exchange Right and the Automatic Exchange Right by Parent or CallCo, as the case may be, to the Share Trustee.

During the term of the Trust, and subject to the terms and conditions of this Agreement, the Share Trustee shall possess and be vested with full legal ownership of the Exchange Right and the Automatic Exchange Right and shall be entitled to exercise all of the rights and powers of an owner with respect to the Exchange Right and the Automatic Exchange Right, provided that the Share Trustee shall:

hold the Exchange Right and the Automatic Exchange Right and the legal title thereto as Share Trustee solely for the use and benefit of the Beneficiaries in accordance with the provisions of this Agreement; and

except as specifically authorized by this Agreement, have no power or authority to exercise or otherwise deal in or with the Exchange Right or the Automatic Exchange Right, and the Share Trustee shall not exercise any such rights for any purpose other than the purposes for which the Trust is created pursuant to this Agreement.

Legended Exchangeable Share Document

General Exercise of Exchange Right

Purchase Price

Exercise Instructions

a duly completed notice of exercise of the Exchange Right substantially in the form attached as Exhibit B, contained on the reverse of or attached to the Exchangeable Share Documents, stating (i) that the Beneficiary thereby instructs the Share Trustee to exercise the Exchange Right so as to require Parent or CallCo to purchase from the Beneficiary the number of Exchangeable Shares specified therein, (ii) that such Beneficiary has good title to and owns all such Exchangeable Shares to be acquired by Parent or CallCo free and clear of all liens, claims, security interests and encumbrances, (iii) the names in which the Delaware Common Stock issuable in connection with the exercise of the Exchange Right are to be issued, and (iv) the names and addresses of the persons to whom such new certificates or book-entry evidence should be delivered; and

payment (or evidence satisfactory to Parent, ExchangeCo and the Share Trustee of payment) of the taxes (if any) payable as contemplated by Section 5.8 of this Agreement;

Delivery of Delaware Common Stock; Effect of Exercise

Exercise of Exchange Right Subsequent to Retraction

Stamp or Other Transfer Taxes

Notice of Insolvency Event

U.S. Securities Law Compliance and Listing of Delaware Common Stock

promptly file a prospectus supplement under a then existing and effective registration statement or a new registration statement (such prospectus supplement or new registration statement, the “Registration Statement”) on Form S-3 or, if Parent is not then eligible to use Form S-3, then such other form as Parent is then eligible to use, under the Securities Act of 1933, as amended (the “1933 Act”), to register the issuance of all shares of Delaware Common Stock to be issued or delivered to holders of the Exchangeable Shares (including, for greater certainty, pursuant to the Exchange Right or the Automatic Exchange Right);

cause the Registration Statement to become effective as soon as reasonably practicable; and

cause the Registration Statement (or a successor registration statement) to remain effective at all times that any Exchangeable Shares remain outstanding

Delaware Common Stock

Automatic Exchange on Liquidation of Parent

Parent shall give the Share Trustee written notice of each of the following events (each, a “Liquidation Event”) at the time set forth below:

in the event of any determination by the board of directors of Parent to institute voluntary liquidation, dissolution or winding-up proceedings with respect to Parent or to effect any other distribution of assets of Parent among its stockholders for the purpose of winding up its affairs, at least 30 days prior to the proposed effective date of such liquidation, dissolution, winding-up or other distribution; and

as soon as practicable following the earlier of (A) receipt by Parent of notice of, and (B) Parent otherwise becoming aware of any instituted claim, suit, petition or other proceedings with respect to the involuntary liquidation, dissolution or winding-up of Parent or to effect any other distribution of assets of Parent among its stockholders for the purpose of winding up its affairs, in each case where Parent has failed to contest in good faith any such proceeding commenced in respect of Parent within 30 days of becoming aware thereof.

As soon as practicable following receipt by the Share Trustee from Parent of notice of a Liquidation Event, the Share Trustee shall give notice thereof to the Beneficiaries. Such notice shall be provided by Parent to the Share Trustee and shall include a brief description of the automatic exchange of Exchangeable Shares for Delaware Common Stock provided for in Section 5.12(3) (the “Automatic Exchange Right”).

In order that the Beneficiaries will be able to participate on a pro rata basis with the holders of Delaware Common Stock in the distribution of assets of Parent in connection with a Liquidation Event, immediately prior to the effective date of a Liquidation Event (the “Liquidation Event Effective Date”), each of the then outstanding Exchangeable Shares (other than Exchangeable Shares held by Parent and its Affiliates) shall be automatically exchanged for one share of Delaware Common Stock multiplied by the Exchangeable Share Exchange Ratio, and in respect of each Beneficiary, rounded down to the nearest whole share. To effect such automatic exchange, Parent (or, if Parent so decides, in its sole discretion and to the extent permitted by applicable law, CallCo) shall exchange each such Exchangeable Share outstanding immediately prior to the Liquidation Event Effective Date, and each Beneficiary shall transfer each Exchangeable Shares held by it at such time, free and clear of any lien, claim or encumbrance, for an amount per share equal to the Exchangeable Share Price immediately prior to the Liquidation Event Effective Date, which amount shall be satisfied in full by Parent delivering to such holder the Exchangeable Share Consideration representing such Exchangeable Share Price. For greater certainty, the Beneficiary shall upon delivery of the Exchangeable Share Consideration cease to have any rights to be paid by ExchangeCo any amount in respect of declared and unpaid dividends on the Exchangeable Shares.

The closing of the exercise of the Automatic Exchange Right shall be deemed to have occurred at the close of business on the Business Day immediately prior to the Liquidation Event Effective Date, and each Beneficiary shall be deemed to have transferred to Parent or CallCo, as applicable, all of such Beneficiary’s right, title and interest in and to the Exchangeable Shares held by such Beneficiary free and clear of any lien, claim or encumbrance and the related interest in the Trust Estate, any right of each such Beneficiary to receive declared and unpaid dividends from ExchangeCo shall be deemed to be satisfied and discharged, and each such Beneficiary shall cease to be a holder of such Exchangeable Shares and Parent or CallCo, as applicable, shall deliver or cause to be delivered to the Share Trustee, for delivery to such Beneficiary, the Exchangeable Share Consideration deliverable to such Beneficiary upon such exercise of the Automatic Exchange Right. Concurrently with each such Beneficiary ceasing to be a holder of Exchangeable Shares, such Beneficiary shall be considered and deemed for all purposes to be the holder of the Delaware Common Stock included in the Exchangeable Share Consideration to be delivered to such Beneficiary and the Exchangeable Share Documents held by such Beneficiary previously representing the Exchangeable Shares exchanged by the Beneficiary with Parent or CallCo, as applicable, pursuant to the exercise of the Automatic Exchange Right shall thereafter be deemed to represent the Delaware Common Stock issued to such Beneficiary by Parent pursuant to the exercise of the Automatic Exchange Right. Upon the request of any Beneficiary and the surrender by such Beneficiary of Exchangeable Share certificates or book-entry evidence deemed to represent Delaware Common Stock, duly endorsed in blank and accompanied by such instruments of transfer as Parent or the transfer agent of Parent may reasonably require, Parent shall deliver or cause to be delivered to such Beneficiary book-entry evidence representing the Delaware Common Stock of which the Beneficiary is the holder.

Withholding Rights

Notwithstanding anything to the contrary contained in this Agreement, each of Parent, ExchangeCo, CallCo, the Share Trustee, and any other person that has any withholding obligation with respect to any amount paid or deemed paid under this Agreement (any such person, an “Other Withholding Agent”) shall be entitled to deduct and withhold or direct Parent, ExchangeCo, CallCo, the Share Trustee, or any Other Withholding Agent to deduct and withhold on their behalf, from any amount or consideration paid, deemed paid or otherwise deliverable to any person under this Agreement (an “Affected Person”) such amounts as are required to be deducted or withheld with respect to such payment or deemed payment under the Income Tax Act (Canada), the U.S. Internal Revenue Code of 1986, or any provision of any federal, provincial, territorial, state, local or other tax Law (a “Withholding Obligation”). Parent, ExchangeCo, CallCo, the Share Trustee, or any Other Withholding Agent may act and rely on the advice of counsel with respect to such matters. To the extent that amounts are so deducted or withheld, such deducted or withheld amounts shall be treated for all purposes hereof as having been paid to the Affected Person to whom such amounts would otherwise have been paid or deemed paid, and such deducted or withheld amounts shall be timely remitted to the appropriate Governmental Entity as required by applicable Law.

Parent, ExchangeCo, CallCo, the Share Trustee and any Other Withholding Agent shall also have the right to:

withhold and sell, or direct Parent, ExchangeCo, CallCo, the Share Trustee, or any Other Withholding Agent to deduct and withhold and sell on their behalf, on their own account or through a broker (the “Broker”), and on behalf of any Affected Person; or

require the Affected Person to irrevocably direct the sale through a Broker and irrevocably direct the Broker to pay the proceeds of such sale to Parent, ExchangeCo, CallCo, the Share Trustee, or any Other Withholding Agent as appropriate (and, in the absence of such irrevocable direction, the Affected Person shall be deemed to have provided such irrevocable direction);

Before delivering any amount or consideration to any Affected Person, the Share Trustee shall obtain from Parent a written confirmation of the Withholding Obligations, if any. The Share Trustee shall be entitled to rely on Parent’s written confirmation of any such Withholding Obligations and the Share Trustee shall not be responsible nor liable for the calculation or determination of the same.

No Fractional Shares

Powers and Duties of the Share Trustee

The rights, powers, duties and authorities of the Share Trustee under this Agreement, in its capacity as Share Trustee of the Trust, shall include:

receipt and deposit of the Special Voting Stock from Parent as Share Trustee for and on behalf of the Beneficiaries in accordance with the provisions of this Agreement;

granting proxies and distributing materials to Beneficiaries as provided in this Agreement;

voting the Beneficiary Votes on the direction and behalf of the Beneficiaries in accordance with the provisions of this Agreement;

receiving the grant of the Exchange Right from Parent and CallCo, and the Automatic Exchange Right from Parent, as Share Trustee for and on behalf of the Beneficiaries in accordance with the provisions of this Agreement;

exercising the Exchange Right and enforcing the benefit of the Automatic Exchange Right, in each case in accordance with the provisions of this Agreement, and in connection therewith receiving from Beneficiaries any requisite documents and distributing to such Beneficiaries the Exchangeable Share Consideration to which such Beneficiaries are entitled pursuant to the exercise of the Exchange Right or the Automatic Exchange Right, as the case may be;

holding title to the Trust Estate;

investing any moneys forming, from time to time, a part of the Trust Estate as provided in this Agreement;

taking action at the direction of a Beneficiary or Beneficiaries to enforce the obligations of Parent, CallCo and ExchangeCo under this Agreement; and

taking such other actions and doing such other things as are specifically provided in this Agreement to be carried out by the Share Trustee.

In the exercise of such rights, powers, duties and authorities, the Share Trustee shall have (and is granted) such incidental and additional rights, powers, duties and authority not in conflict with any of the provisions of this Agreement as the Share Trustee, acting in good faith and in the reasonable exercise of its discretion, may deem necessary, appropriate or desirable to effect the purpose of the Trust. Any exercise of such discretionary rights, powers, duties and authorities by the Share Trustee shall be final, conclusive and binding upon all persons. For greater certainty, the Share Trustee shall have only those duties as are set out specifically in this Agreement.

The Share Trustee, in exercising its rights, powers, duties and authorities hereunder, shall act honestly and in good faith and with a view to the best interests of the Beneficiaries and shall exercise the care, diligence and skill that a reasonably prudent Share Trustee would exercise in comparable circumstances.

The Share Trustee shall not be bound to give notice or do or take any act, action or proceeding by virtue of the powers conferred on it hereby unless and until it shall be specifically required to do so under the terms hereof; nor shall the Share Trustee be required to take any notice of, or to do, or to take any act, action or proceeding as a result of any default or breach of any provision hereunder, unless and until notified in writing of such default or breach, which notices shall distinctly specify the default or breach desired to be brought to the attention of the Share Trustee, and in the absence of such notice the Share Trustee may for all purposes of this Agreement conclusively assume that no default or breach has been made in the observance or performance of any of the representations, warranties, covenants, agreements or conditions contained herein.

No Conflict of Interest

Dealings with Transfer Agents, Registrars, etc.

Each of Parent, CallCo and ExchangeCo irrevocably authorizes the Share Trustee, from time to time, to:

consult, communicate and otherwise deal with the respective registrars and transfer agents, and with any such subsequent registrar or transfer agent, of the Exchangeable Shares and Delaware Common Stock; and

requisition, from time to time, from any such registrar or transfer agent, any information readily available from the records maintained by it which the Share Trustee may reasonably require for the discharge of its duties and responsibilities under this Agreement.

Each of Parent and CallCo irrevocably authorizes its respective registrar and Transfer Agent to comply with all such requests and covenants that it shall supply the Share Trustee or its transfer agent, as the case may be, in a timely manner with duly executed share certificates or book-entry evidence for the purpose of completing the exercise from time to time of all rights to acquire Delaware Common Stock hereunder, under the Exchangeable Share Provisions and under any other security or commitment given to the Beneficiaries pursuant thereto, in each case pursuant to the provisions hereof or of the Exchangeable Share Provisions or otherwise.

Books and Records

the property and funds comprising the Trust Estate as of that date;

the number of exercises of the Exchange Right, if any, and the aggregate number of Exchangeable Shares received by the Share Trustee on behalf of Beneficiaries in consideration of the issuance and delivery by Parent or CallCo of Delaware Common Stock in connection with the Exchange Right, during the calendar year ended on such December 31; and

any action taken by the Share Trustee in the performance of its duties under this Agreement which it had not previously reported.

Income Tax Returns and Reports

Indemnification Prior to Certain Actions by Share Trustee

The Share Trustee shall exercise any or all of the rights, duties, powers or authorities vested in it by this Agreement at the request, order or direction of any Beneficiary upon such Beneficiary furnishing to the Share Trustee reasonable funding, security or indemnity against the costs, expenses and liabilities which may be incurred by the Share Trustee therein or thereby, provided that no Beneficiary shall be obligated to furnish to the Share Trustee any such funding, security or indemnity in connection with the exercise by the Share Trustee of any of its rights, duties, powers and authorities with respect to the Special Voting Stock pursuant to Article 4, subject to Section 6.15, and with respect to the Exchange Right and the Automatic Exchange Right pursuant to Article 5.

None of the provisions contained in this Agreement shall require the Share Trustee to expend or risk its own funds or otherwise incur financial liability in the exercise of any of its rights, powers, duties, or authorities unless funded, given security and indemnified as aforesaid.

Action of Beneficiaries

Reliance Upon Declarations

Evidence and Authority to Share Trustee

Parent, CallCo and/or ExchangeCo shall furnish to the Share Trustee evidence of compliance with the conditions provided for in this Agreement relating to any action or step required or permitted to be taken by Parent, CallCo and/or ExchangeCo or the Share Trustee under this Agreement or as a result of any obligation imposed under this Agreement, including in respect of the Voting Rights, the Exchange Right or the Automatic Exchange Right and the taking of any other action to be taken by the Share Trustee at the request of or on the application of Parent, CallCo and/or ExchangeCo promptly if and when:

such evidence is required by any other Section of this Agreement to be furnished to the Share Trustee in accordance with the terms of this Section 6.9; or

the Share Trustee, in the exercise of its rights, powers, duties and authorities under this Agreement, gives Parent, CallCo and/or ExchangeCo written notice requiring it to furnish such evidence in relation to any particular action or obligation specified in such notice.

Such evidence shall consist of an Officer’s Certificate of Parent, CallCo and/or ExchangeCo or a statutory declaration or a certificate made by persons entitled to sign an Officer’s Certificate stating that any such condition has been complied with in accordance with the terms of this Agreement.

Whenever such evidence relates to a matter other than the Voting Rights or the Exchange Right or the Automatic Exchange Right or the taking of any other action to be taken by the Share Trustee at the request or on the application of Parent, CallCo and/or ExchangeCo, and except as otherwise specifically provided herein, such evidence may consist of a report or opinion of any solicitor, attorney, auditor, accountant, appraiser, valuer or other expert or any other person whose qualifications give authority to a statement made by such person; provided, however, that if such report or opinion is furnished by a director, officer or employee of Parent, CallCo and/or ExchangeCo it shall be in the form of an Officer’s Certificate or a statutory declaration.

Each statutory declaration, Officer’s Certificate, opinion or report furnished to the Share Trustee as evidence of compliance with a condition provided for in this Agreement shall include a statement by the person giving the evidence:

declaring that such person has read and understands the provisions of this Agreement relating to the condition in question;

describing the nature and scope of the examination or investigation upon which such person based the statutory declaration, certificate, statement or opinion; and

declaring that such person has made such examination or investigation as such person believes is necessary to enable such person to make the statements or give the opinions contained or expressed therein.

Experts, Advisers and Agents

in relation to these presents act and rely on the opinion or advice of or information obtained from any solicitor, attorney, auditor, accountant, appraiser, valuer or other expert, whether retained by the Share Trustee or by Parent, CallCo and/or ExchangeCo or otherwise, and may retain or employ such assistants as may be necessary to the proper discharge of its powers and duties and determination of its rights hereunder and may pay proper and reasonable compensation for all such legal and other advice or assistance as aforesaid;

employ such agents and other assistants as it may reasonably require for the proper determination and discharge of its powers and duties hereunder; and

pay reasonable remuneration for all services performed for it (and shall be entitled to receive reasonable remuneration for all services performed by it) in the discharge of the trusts hereof and compensation for all reasonable disbursements, costs and expenses made or incurred by it in the discharge of its duties hereunder and in the management of the Trust.

Investment of Moneys Held by Share Trustee

Share Trustee Not Required to Give Security

Share Trustee Not Bound to Act on Request

Authority to Carry on Business

Conflicting Claims

If conflicting claims or demands are made or asserted with respect to any interest of any Beneficiary in any Exchangeable Shares, including any disagreement between the heirs, representatives, successors or assigns succeeding to all or any part of the interest of any Beneficiary in any Exchangeable Shares, resulting in conflicting claims or demands being made in connection with such interest, then the Share Trustee shall be entitled, in its sole discretion, to refuse to recognize or to comply with any such claims or demands. In so refusing, the Share Trustee may elect not to exercise any Voting Rights, Exchange Right, Automatic Exchange Right or other rights subject to such conflicting claims or demands and, in so doing, the Share Trustee shall not be or become liable to any person on account of such election or its failure or refusal to comply with any such conflicting claims or demands. The Share Trustee shall be entitled to continue to refrain from acting and to refuse to act until:

the rights of all adverse claimants with respect to the Voting Rights, Exchange Right, Automatic Exchange Right or other rights subject to such conflicting claims or demands have been adjudicated by a final judgement of a court of competent jurisdiction and all rights of appeal have expired; or

all differences with respect to the Voting Rights, Exchange Right, Automatic Exchange Right or other rights subject to such conflicting claims or demands have been conclusively settled by a valid written agreement binding on all such adverse claimants, and the Share Trustee shall have been furnished with an executed copy of such agreement certified to be in full force and effect.

If the Share Trustee elects to recognize any claim or comply with any demand made by any such adverse claimant, it may in its discretion require such claimant to furnish such surety bond or other security satisfactory to the Share Trustee as it shall deem appropriate to fully indemnify it as between all conflicting claims or demands.

Acceptance of Trust

Third Party Interests

Privacy

Fees and Expenses of the Share Trustee

Indemnification of the Share Trustee

Parent, CallCo and ExchangeCo jointly and severally agree to indemnify and hold harmless the Share Trustee and each of its directors, officers, employees and agents appointed and acting in accordance with this Agreement (collectively, the “Indemnified Parties”) against all claims, losses, damages, reasonable costs, penalties, fines and reasonable expenses (including reasonable and documented expenses of the Share Trustee’s legal counsel) which, without bad faith, gross negligence, fraud or willful misconduct on the part of such Indemnified Party, may be paid, incurred or suffered by the Indemnified Party by reason or as a

result of the Share Trustee’s acceptance or administration of the Trust, its compliance with its duties set forth in this Agreement, or any written or oral instruction delivered to the Share Trustee by Parent, CallCo or ExchangeCo pursuant hereto.

The Share Trustee shall promptly notify Parent, CallCo and ExchangeCo of a claim or of any action commenced against any Indemnified Parties promptly after the Share Trustee or any of the Indemnified Parties shall have received written assertion of such a claim or action or have been served with a summons or other first legal process giving information as to the nature and basis of the claim or action; provided, however, that the omission to so notify Parent, CallCo or ExchangeCo shall not relieve Parent, CallCo or ExchangeCo of any liability which any of them may have to any Indemnified Party except to the extent that any such delay prejudices the defence of any such claim or action or results in any increase in the liability which Parent, CallCo or ExchangeCo have under this indemnity. Subject to (ii) below, Parent, CallCo and ExchangeCo shall be entitled to participate at their own expense in the defence and, if Parent, CallCo and ExchangeCo so elect at any time after receipt of such notice, either of them may assume the defence of any suit brought to enforce any such claim. The Share Trustee shall have the right to employ separate counsel in any such suit and participate in the defence thereof, but the fees and expenses of such counsel shall be at the expense of the Share Trustee unless (i) the employment of such counsel has been authorized by Parent, CallCo or ExchangeCo and such authorization is not to be unreasonably withheld, or (ii) the named parties to any such suit include both the Share Trustee and Parent, CallCo or ExchangeCo and the Share Trustee shall have been advised by counsel acceptable to Parent, CallCo and ExchangeCo that there may be one or more legal defences available to the Share Trustee that are different from or in addition to those available to Parent, CallCo or ExchangeCo and that, in the judgement of such counsel, would present a conflict of interest were a joint representation to be undertaken (in which case Parent, CallCo and ExchangeCo shall not have the right to assume the defence of such suit on behalf of the Share Trustee but shall be liable to pay the reasonable fees and expenses of counsel for the Share Trustee). This indemnity shall survive the termination of the Trust and the resignation or removal of the Share Trustee.

This indemnity shall survive the termination of the Trust and the resignation or removal of the Share Trustee.

Limitation of Liability

The Share Trustee shall not be held liable for any loss which may occur by reason of depreciation of the value of any part of the Trust Estate or any loss incurred on any investment of funds pursuant to this Agreement, except to the extent that such loss is attributable to the bad faith, gross negligence, fraud or willful misconduct on the part of the Share Trustee.

Notwithstanding any other provision of this Agreement other than clause (1) above, any liability of the Share Trustee, shall be limited to an amount of fees paid by parties to the Share Trustee under this agreement in the thirty-six (36) months immediately prior to the Share Trustee receiving the first notice of claim.

Notwithstanding any other provision of this Agreement, the Share Trustee shall not be liable for any (i) breach by any other party of any applicable securities legislation, and (ii) lost profits, punitive, consequential, special, indirect, incidental, exemplary or aggravated losses or damages of any other person under any circumstances whatsoever, whether such losses or damages are foreseeable or unforeseeable.

This limitation of liability shall survive the termination of the Trust and the resignation or removal of the Share Trustee.

Force Majeure

Resignation

Removal

Successor Share Trustee

Notice of Successor Share Trustee

Certain Requirements in Respect of Combination, etc.

such other person or continuing corporation (the “Parent Successor”), by operation of law, becomes, without more, bound by the terms and provisions of this Agreement or, if not so bound, executes, prior to or contemporaneously with the consummation of such transaction, a trust agreement supplemental hereto and such other instruments (if any) as are necessary or advisable to evidence the assumption by the Parent Successor of liability for all moneys payable and property deliverable hereunder and the covenant of such Parent Successor to pay and deliver or cause to be paid and delivered the same and its agreement to observe and perform all the covenants and obligations of Parent under this Agreement; and

such transaction shall be upon such terms and conditions as to substantially preserve and not impair any of the rights, duties, powers and authorities of the Share Trustee or the holders of the Exchangeable Shares.

Vesting of Powers in Successor

Wholly-Owned Subsidiaries

Successor Transactions

in which Parent merges, combines or amalgamates with, or in which all or substantially all of the then outstanding Delaware Common Stock are acquired by, one or more other corporations to which Parent is, immediately before such merger, amalgamation or acquisition, “related” within the meaning of the Income Tax Act (Canada) (otherwise than by virtue of a right referred to in paragraph 251(5)(b) thereof);

which does not result in an acceleration of the Redemption Date in accordance with paragraph (ii) of the definition of Redemption Date in the Exchangeable Share Provisions; and

in which all or substantially all of the then outstanding Delaware Common Stock are converted into or exchanged for shares or rights to receive such shares (the “Other Shares”) of another corporation (the “Other Corporation”) that, immediately after such Parent Control Transaction, owns or controls, directly or indirectly, Parent;

Amendments, Modifications, etc.

Ministerial Amendments

adding to the covenants of any or all parties hereto for the protection of the Beneficiaries hereunder provided that the board of directors of each of Parent, CallCo and ExchangeCo shall be of the good faith opinion that such additions will not be prejudicial to the rights or interests of the Beneficiaries;

evidencing the succession of Parent Successors and the covenants of and obligations assumed by each such Parent Successor in accordance with the provisions of Article 10;

making such amendments or modifications not inconsistent with this Agreement as may be necessary or desirable with respect to matters or questions arising hereunder which, in the good faith opinion of the board of directors of each of Parent, CallCo and ExchangeCo and in the opinion of the Share Trustee it may be expedient to make, provided that each such board of directors and the Share Trustee shall be of the good faith opinion, after consultation with counsel, that such amendments or modifications will not be prejudicial to the rights or interests of the Beneficiaries; or

making such changes or corrections which, on the advice of counsel to Parent, CallCo, ExchangeCo and the Share Trustee, are required for the purpose of curing or correcting any ambiguity or defect or inconsistent provision or clerical omission or mistake or manifest error, provided that each such board of directors and the Share Trustee shall be of the good faith opinion that such changes or corrections will not be prejudicial to the rights or interests of the Beneficiaries.

Meeting to Consider Amendments

Changes in Capital of Parent and ExchangeCo

Execution of Supplemental Trust Agreements

evidencing the succession of Parent Successors and the covenants of and obligations assumed by each such Parent Successor in accordance with the provisions of Article 10 and the successors of the Share Trustee or any successor Share Trustee in accordance with the provisions of Article 9;

making any additions to, deletions from or alterations of the provisions of this Agreement or the Voting Rights, the Exchange Right or the Automatic Exchange Right which, in the opinion of the Share Trustee relying on the advice of counsel, will not be prejudicial to the interests of the Beneficiaries or are, in the opinion of counsel to the Share Trustee, necessary or advisable in order to incorporate, reflect or comply with any legislation the provisions of which apply to Parent, CallCo, ExchangeCo, the Share Trustee or this Agreement; and

for any other purposes not inconsistent with the provisions of this Agreement, including without limitation to make or evidence any amendment or modification to this Agreement as contemplated hereby; provided that, in the opinion of the Share Trustee relying on the advice of counsel, the rights of the Share Trustee and Beneficiaries will not be prejudiced thereby.

Term

no outstanding Exchangeable Shares are held by a Beneficiary following the Sunset Date (as defined in the Exchangeable Share Provisions); and

each of Parent, CallCo and ExchangeCo elects in writing to terminate the Trust and such termination is approved by the Beneficiaries in accordance with Section 26.11(b) of the Exchangeable Share Provisions.

Survival of Agreement

Severability

Enurement

Notices to Parties

In the case of Parent, CallCo or ExchangeCo, at the following address:

In the case of Share Trustee, at the following addresses:

Notice to Beneficiaries

Counterparts

Jurisdiction

Attornment

Communications Methods

Definitions. For the purposes of these Exchangeable Share Provisions:

one share of Delaware Common Stock multiplied by the Exchangeable Share Exchange Ratio on the Business Day immediately preceding the date on which the Exchangeable Share Price in respect of the Exchangeable Share Consideration being delivered is calculated; plus

a cheque or cheques payable at par at any branch of the bankers of the payor in the amount contemplated by clause (ii) and (iv) (and in respect of clause (iv), to the extent of a cash dividend that is payable), as applicable, of the definition of Exchangeable Share Price; plus

such stock or other property contemplated by clause (iii) and (iv) (and in respect of clause (iv), to the extent of a non-cash dividend that is payable), as applicable, of the definition of Exchangeable Share Price;

the Current Market Price of one share of Delaware Common Stock at such time multiplied by the Exchangeable Share Exchange Ratio on the Business Day immediately preceding the date on which the Exchangeable Share Price is calculated;

the full amount of all cash dividends (A) declared, payable and unpaid on the Exchangeable Share, plus (B) to the extent a cash dividend has been declared by Parent on the Delaware Common Stock at such time for which a corresponding cash dividend on the Exchangeable Share would be required to be, but has not yet been, declared at such time, then the undeclared and unpaid cash dividend on such Exchangeable Share of equal amount multiplied by the Exchangeable Share Exchange Ratio (but only to the extent the Company has not taken one of the alternative actions permitted under these Exchangeable Share Provisions to account for such declaration by Parent);

the full amount of all non-cash dividends declared, payable and unpaid at such time on such Exchangeable Share (but excluding any dividends or distributions pursuant to a Preferred Stock Rights Agreement); and

the full amount of all dividends declared and payable in respect of each share of Delaware Common Stock (as adjusted by the Exchangeable Share Exchange Ratio from time to time) which have not, at such time, been paid on such Exchangeable Share in accordance herewith or adjusted for under the Exchangeable Share Exchange Ratio, or otherwise accounted for in under clauses (ii) and (iii) above in this definition (but excluding any dividends or distributions pursuant to a Preferred Stock Rights Agreement).

any person acquires, directly or indirectly, any voting security of Parent and, immediately after such acquisition, directly or indirectly owns, or exercises control and direction over, voting securities representing more than 50% of the total voting power of all of the then outstanding voting securities of Parent, other than any such transaction which would result in the holders of outstanding voting securities of Parent immediately prior to such transaction directly or indirectly owning, or exercising control and direction over, voting securities representing more than 50% of the total voting power of all of the voting securities of the acquiring person outstanding immediately after such transaction;

the shareholders of Parent approve a merger, combination, consolidation, recapitalization or reorganization of Parent, other than any such transaction which would result in the holders of outstanding voting securities of Parent immediately prior to such transaction directly or indirectly owning, or exercising control and direction over, voting securities representing more than 50% of the total voting power of all of the voting securities of the surviving entity outstanding immediately after such transaction;

the shareholders of Parent approve a liquidation of Parent;

Parent sells or disposes of all or substantially all of its assets; or

any other transaction or series of related transactions having a substantially similar effect.

the aggregate number of Exchangeable Shares issued and outstanding (other than Exchangeable Shares held by Parent and its affiliates) is less than 5% of the number of Exchangeable Shares

issued on the Effective Date (as such number of shares may be adjusted as deemed appropriate by the Board of Directors to give effect to any subdivision, combination or consolidation of, or stock or share dividend on, the Exchangeable Shares, any issue or distribution of rights to acquire Exchangeable Shares or securities exchangeable for or convertible into Exchangeable Shares, any issue or distribution of other securities or rights or evidences of indebtedness or assets, or any other capital reorganization or other transaction affecting the Exchangeable Shares), in which case the Board of Directors may accelerate such redemption date to such date as it may determine, upon at least 30 days’ prior written notice to the holders of the Exchangeable Shares and the Share Trustee;

a Parent Control Transaction is proposed, in which case, provided the Board of Directors determines in good faith that it is not practicable to substantially replicate the terms and conditions of the Exchangeable Shares in connection with such Parent Control Transaction or that the redemption of all but not less than all of the outstanding Exchangeable Shares (other than Exchangeable Shares held by Parent and its affiliates) is necessary to enable the completion of such Parent Control Transaction in accordance with its terms, the Board of Directors may accelerate such redemption date to such date as it may determine, upon such number of days prior written notice to the holders of the Exchangeable Shares and the Share Trustee as the Board of Directors may determine to be reasonably practicable in such circumstances;

Interpretation Not Affected by Headings. The division of these Exchangeable Share Provisions into sections and other portions and the insertion of headings are for convenience of reference only and shall not affect the construction or interpretation hereof. Unless otherwise indicated, all references to a “Section” followed by a number and/or a letter refer to the specified section of these Exchangeable Share Provisions.

Number and Gender. In these Exchangeable Share Provisions, unless the context otherwise clearly requires, words used herein importing the singular include the plural and vice versa and words imparting any gender shall include all genders.

Date of Any Action. If any date on which any action is required to be taken hereunder by any person is not a Business Day, then such action shall be required to be taken on the next succeeding day which is a Business Day.

Currency. In these Exchangeable Share Provisions, unless stated otherwise, all cash payments provided for herein shall be made in United States dollars.

Dividends and Distributions. A holder of an Exchangeable Share shall be entitled to receive and the Board of Directors shall, subject to applicable Law, on each Parent Dividend Declaration Date, declare a dividend or other distribution on each Exchangeable Share:

in the case of a cash dividend or other distribution declared on the Delaware Common Stock (but excluding any dividends or distributions pursuant to a Preferred Stock Rights Agreement), in an

amount in cash payable in United States dollars for each Exchangeable Share equal to (A) the cash dividend or other distribution declared on each share of Delaware Common Stock on the Parent Dividend Declaration Date, multiplied by (B) the relevant Exchangeable Share Exchange Ratio;

in the case of a stock or share dividend or other distribution declared on the Delaware Common Stock to be paid in Delaware Common Stock (but excluding any dividends or dividends or distributions pursuant to a Preferred Stock Rights Agreement), by the issue or transfer by the Company of such number of Exchangeable Shares for each Exchangeable Share as is equal to the number of Delaware Common Stock to be paid on each share of Delaware Common Stock multiplied by the relevant Exchangeable Share Exchange Ratio; provided, however, that the Company may, in lieu of such stock or share dividend or other distribution, elect to effect a corresponding, contemporaneous and economically equivalent (as determined by the Board of Directors in accordance with Sections 26.3(e) and 26.3(f)) subdivision of the outstanding Exchangeable Shares; or

in the case of a dividend or other distribution declared on the Delaware Common Stock in property other than cash or Delaware Common Stock (but excluding any dividends or distributions pursuant to a Preferred Stock Rights Agreement), in such type and amount of property for each Exchangeable Share as is the same as or economically equivalent (as determined by the Board of Directors in accordance with Section 26.3(e)) and adjusted for the relevant Exchangeable Share Exchange Ratio to the type and amount of property declared as a dividend or other distribution on each share of Delaware Common Stock; and

Payments of Dividends and Distributions. Cheques of the Company payable at par at any branch of the bankers of the Company shall be issued in respect of any cash dividends or other distributions contemplated by Section 26.3(a)(i) and the sending of such cheque to each holder of an Exchangeable Share shall satisfy the cash dividend or other distribution represented thereby unless the cheque is not paid on presentation. An Exchangeable Share Document registered in the name of the registered holder of Exchangeable Shares shall be delivered in respect of any stock or share dividends or other distributions contemplated by Section 26.3(a)(ii) or any subdivision of the Exchangeable Shares under Sections 26.3(a)(ii) and 26.3(f) and the sending of such Exchangeable Share Document to each holder of an Exchangeable Share shall satisfy the stock or share dividend or other distribution represented thereby. Such other type and amount of property in respect of any dividends or other distributions contemplated by Section 26.3(a)(iii) shall be issued, distributed or transferred by the Company in such manner as it shall determine, and the issuance, distribution or transfer thereof by the Company to each holder of an Exchangeable Share shall satisfy the dividend or other distribution represented thereby. Subject to the requirements of applicable Law with respect to unclaimed property, no holder of an Exchangeable Share shall be entitled to recover by action or other legal process against the Company any dividend or other distribution that is represented by a cheque that has not been duly presented to the Company’s bankers for payment or that otherwise remains unclaimed for a period of three (3) years from the date on which such dividend was payable.

Record and Payment Dates. The record date for the determination of the holders of Exchangeable Shares entitled to receive payment of, and the payment date for, any dividend or other distribution declared on the Exchangeable Shares under Section 26.3(a) shall be the same dates as the record date and payment date, respectively, for the corresponding dividend or other distribution declared on the Delaware Common Stock (but excluding any dividends or distributions pursuant to a Preferred Stock Rights Agreement). The record date for the determination of the holders of Exchangeable Shares entitled to receive Exchangeable Shares in connection with any subdivision of the Exchangeable Shares under Sections 26.3(a)(ii) and 26.3(f), and the effective date of such subdivision, shall be the same dates as the record and payment date, respectively, for the corresponding stock or share dividend or other distribution declared on the Delaware Common Stock.

Partial Payment. If on any payment date for any dividends or other distributions declared on the Exchangeable Shares under Section 26.3(a) the dividends or other distributions are not paid in full on all of the Exchangeable Shares then outstanding, any such dividends or other distributions that remain unpaid shall be paid on a subsequent date or dates determined by the Board of Directors on which the Company shall have sufficient moneys, assets or property properly applicable to the payment of such dividends or other distributions.

Economic Equivalence. The Board of Directors shall determine, in good faith and in its sole discretion (with the assistance of such financial or other advisors as the Board of Directors may determine), “economic equivalence” for the purposes of the Exchangeable Share Provisions and each such determination shall be conclusive and binding on the Company and its shareholders. In making each such determination, the following factors shall, without excluding other factors determined by the Board of Directors to be relevant, be considered by the Board of Directors:

in the case of any stock or share dividend or other distribution payable in Delaware Common Stock (but excluding any dividends or distributions pursuant to a Preferred Stock Rights Agreement), the number of such shares issued as a result of such stock or share dividend or other distribution in proportion to the number of Delaware Common Stock previously outstanding;

in the case of the issuance or distribution of any rights, options or warrants to subscribe for or purchase Delaware Common Stock or securities exchangeable for or convertible into or carrying rights to acquire Delaware Common Stock (but excluding any dividends or distributions pursuant to a Preferred Stock Rights Agreement), the relationship between the exercise price of each such right, option or warrant, the number of such rights, options or warrants to be issued or distributed in respect of each share of Delaware Common Stock and the Current Market Price of a share of Delaware Common Stock, the price volatility of the Delaware Common Stock and the terms of any such instrument;

in the case of the issuance or distribution of any other form of property including, without limitation, any shares or securities of Parent of any class other than Delaware Common Stock, any rights, options or warrants other than those referred to in Section 26.3(e)(ii), any evidences of indebtedness of Parent or any assets of Parent (but excluding any dividends or distributions pursuant to a Preferred Stock Rights Agreement), the relationship between the fair market value (as determined by the Board of Directors in the manner above contemplated) of such property to be issued or distributed with respect to each outstanding share of Delaware Common Stock and the Current Market Price of a share of Delaware Common Stock;

in the case of any subdivision, redivision or change of the then outstanding Delaware Common Stock into a greater number of Delaware Common Stock or the reduction, combination, consolidation or change of the then outstanding Delaware Common Stock into a lesser number of Delaware Common Stock or any amalgamation, merger, arrangement, reorganization or other transaction affecting the Delaware Common Stock, the effect thereof upon the then outstanding Delaware Common Stock; and

in all such cases, the general taxation consequences of the relevant event to holders of Exchangeable Shares to the extent that such consequences may differ from the taxation consequences to holders of Delaware Common Stock as a result of differences between taxation Laws of Canada and the United States (except for any differing consequences arising as a result of differing marginal taxation rates and without regard to the individual circumstances of holders of Exchangeable Shares).

Subdivision on Stock or Share Dividend. In the case of a stock or share dividend declared on Delaware Common Stock to be paid in Delaware Common Stock, in lieu of declaring the stock or share dividend contemplated by Section 26.3(a)(ii) on the Exchangeable Shares, the Board of Directors may, in good faith and in its discretion and subject to applicable Law and to obtaining any required regulatory approvals, subdivide, redivide or change each issued and unissued Exchangeable Share on the basis that each Exchangeable Share before such subdivision becomes a number of Exchangeable Shares equal to the sum of (i) one share of Delaware Common Stock, and (ii) the number of Delaware Common Stock to be paid as a share dividend on each share of Delaware Common Stock. In such instance, and notwithstanding any other provision hereof, such subdivision shall become effective on the effective date specified in Section 26.3(c) without any further act or formality on the part of the holders of Exchangeable Shares. For greater certainty, subject to applicable Law, no approval of the holders of Exchangeable Shares to an amendment to these Articles shall be required to give effect to such subdivision.

Share Consolidation. In the case of a consolidation of shares of Delaware Common Stock, the Board of Directors may, in good faith and in its discretion and subject to applicable Law and to obtaining any required regulatory approvals, consolidate each issued and unissued Exchangeable Share on the same basis concurrently with, or as soon as practicable following, the consolidation of the shares of Delaware Common Stock (and to ensure that the Exchangeable Share Exchange Ratio does not decrease as a result of the consolidation of the shares of Delaware Common Stock). For greater certainty, subject to applicable Law, no approval of the holders of Exchangeable Shares to an amendment to these Articles shall be required to give effect to such consolidation.

pay any dividends or other distributions on any shares ranking junior to the Exchangeable Shares with respect to the payment of dividends or other distributions (other than the Common Shares), other than stock or share dividends payable in Common Shares or any such other shares ranking junior to the Exchangeable Shares, as the case may be;

redeem or purchase or make any capital distribution in respect of any shares ranking junior to the Exchangeable Shares with respect to the payment of dividends or other distributions (other than the Common Shares) in the event of the liquidation, dissolution or winding up of the Company, whether voluntary or involuntary, or any other distribution of the assets of the Company among its shareholders for the purpose of winding up its affairs;

redeem or purchase or make any capital distribution in respect of any other shares of the Company ranking equally with the Exchangeable Shares with respect to the payment of dividends or other distributions in the event of the liquidation, dissolution or winding-up of the Company, whether voluntary or involuntary, or any other distribution of the assets of the Company among its shareholders for the purpose of winding up its affairs; or

issue any Exchangeable Share or any other shares ranking equally with, or superior to, the Exchangeable Shares, other than, in each case, by way of stock or share dividends to the holders of such Exchangeable Shares or pursuant to a shareholders rights plan adopted by the Company;

Liquidation Amount. Subject to applicable Laws and the due exercise by CallCo of the Liquidation Call Right (which shall itself be subject to the sale and purchase contemplated by the Automatic Exchange Right), in the event of the liquidation, dissolution or winding-up of the Company or any other distribution of the assets of the Company among its shareholders for the purpose of winding up its affairs, a holder of Exchangeable Shares shall be entitled to receive from the assets of the Company in respect of each Exchangeable Share held by such holder on the effective date of such liquidation, dissolution, winding-up or other distribution (the “Liquidation Date”), before any distribution of any part of the assets of the Company among the holders of the Common Shares or any other shares ranking junior to the Exchangeable Shares with respect to dividends or other distributions an amount per share (the “Liquidation Amount”) equal to the Exchangeable Share Price applicable on the last Business Day prior to the Liquidation Date, which price shall be satisfied in full by the Company delivering or causing to be delivered to such holder the Exchangeable Share Consideration representing the Liquidation Amount for each Exchangeable Share held by such holder.

Payment of Liquidation Amount. In the case of a distribution pursuant to Section 26.5(a), and provided that the sale and purchase contemplated by the Automatic Exchange Right has not occurred and that the Liquidation Call Right has not been exercised by CallCo, on or promptly after the Liquidation Date, the Company shall deliver or cause to be delivered to the holders of the Exchangeable Shares the Liquidation Amount for each such Exchangeable Share, upon presentation and surrender of the Exchangeable Share Documents representing such Exchangeable Shares, together with such other documents and instruments as may be required to effect a transfer of Exchangeable Shares under the BCBCA and these Articles, as applicable, together with such additional documents, instruments and payments as the Transfer Agent or the Company may reasonably require, at any office of the Transfer Agent as may be specified by the Company by notice to the holders of the Exchangeable Shares. Payment of the Liquidation Amount for such Exchangeable Shares shall be made by delivery to each holder, at the address of such holder recorded in the securities register of the Company for the Exchangeable Shares or by holding for pick-up by such holder at the registered office of the Company or at any office of the Transfer Agent as may be specified by the Company by notice to the holders of the Exchangeable Shares, the Exchangeable Share Consideration such holder is entitled to receive pursuant to Section 26.5(a). On and after the Liquidation Date, the holders of the Exchangeable Shares shall cease to be holders of such Exchangeable Shares and shall not be entitled to exercise any of the rights of holders in respect thereof (including, without limitation, any rights under the Voting and Exchange Trust Agreement) other than the right to receive, without interest, their proportionate part of the aggregate Liquidation Amount, unless payment of the aggregate Liquidation Amount for such Exchangeable Shares shall not be made upon presentation and surrender of Exchangeable Share Documents and other required documents in accordance with the foregoing provisions, in which case the rights of the holders shall remain unaffected until the Liquidation Amount has been paid in the manner so provided. The Company shall have the right at any time after the Liquidation Date to transfer or cause to be issued or transferred to, and deposited in a custodial account with, any chartered bank or trust company the Liquidation Amount in respect of the Exchangeable Shares represented by Exchangeable Share Documents that have not at the Liquidation Date been surrendered by the holders thereof, such Liquidation Amount to be held by such bank or trust company as trustee for and on behalf of, and for the use and benefit of, such holders. Upon such deposit being made, the rights of a holder of Exchangeable Shares as of the date of such deposit shall be limited to receiving its proportionate part

of the aggregate Liquidation Amount for such Exchangeable Shares so deposited, without interest, and all dividends and other distributions with respect to the Delaware Common Stock to which such holder is entitled with a record date on or after the date of such deposit and before the date of transfer of such Delaware Common Stock to such holder against presentation and surrender of the Exchangeable Share Documents for the Exchangeable Shares held by them in accordance with the foregoing provisions. Upon such payment or deposit of the Liquidation Amount, the holders of the Exchangeable Shares shall thereafter be considered and deemed for all purposes to be holders of the Delaware Common Stock delivered to them or the custodian on their behalf.

No Right to Participate in Further Distributions. After the Company has satisfied its obligations to pay the holders of the Exchangeable Shares the aggregate Liquidation Amount per Exchangeable Share pursuant to this Section 26.5, such holders shall not be entitled to share in any further distribution of the assets of the Company.

Retraction at Option of Holder

Subject to applicable Laws and the due exercise by CallCo of the Retraction Call Right, a holder of Exchangeable Shares shall be entitled at any time to require the Company to redeem (at the holder’s discretion) any or all of the Exchangeable Shares registered in the name of such holder for an amount per share equal to the Exchangeable Share Price applicable on the last Business Day prior to the Retraction Date (the “Retraction Price”), which price shall be satisfied in full by the Company or CallCo, as applicable, delivering or causing to be delivered to such holder the Exchangeable Share Consideration representing the Retraction Price. A holder of Exchangeable Shares must give notice of such request to redeem or purchase by presenting and surrendering to any office of the Transfer Agent as may be specified by the Company by notice to the holders of the Exchangeable Shares, the Exchangeable Share Documents representing the Exchangeable Shares that such holder desires to have the Company redeem or CallCo purchase, as applicable, together with (A) such other documents and instruments as may be required to effect a transfer of Exchangeable Shares under the BCBCA and these Articles, as applicable, together with such additional documents, instruments and payments as the Transfer Agent or the Company may reasonably require, and (B) a duly executed request (the “Retraction Request”) in the form of the Appendix attached hereto or in such other form as may be acceptable to the Company:

specifying that such holder desires to have all or any number specified therein of the Exchangeable Shares represented by such Exchangeable Share Documents (the “Retracted Shares”) redeemed by the Company or purchased by CallCo, as applicable;

stating the Business Day on which the holder desires to have the Company redeem or CallCo purchase the Retracted Shares (the “Retraction Date”), provided that the Retraction Date shall not be less than 10 Business Days nor more than 15 Business Days after the date on which the Retraction Request is received by the Transfer Agent on behalf of the Company and further provided that, in the event that no such Business Day is specified by the holder in the Retraction Request, the Retraction Date shall be deemed to be the 15th Business Day after the date on which the Retraction Request is received by the Transfer Agent on behalf of the Company, subject to Section 26.6(a)(v); and

acknowledging the overriding right (the “Retraction Call Right”) of CallCo to purchase all but not less than all the Retracted Shares directly from the holder and that the Retraction Request shall be deemed to be a revocable offer by the holder to sell the Retracted Shares to CallCo in accordance with the Retraction Call Right on the Retraction Date for the Retraction Call Right Purchase Price and on the other terms and conditions set out in Section 26.6(b).

In the case of a redemption or purchase of Exchangeable Shares pursuant to this Section 26.6(a), upon receipt by the Transfer Agent in the manner specified in Section 26.6(a)(i) of one or more

Exchangeable Share Documents representing the number of Exchangeable Shares which the holder desires to have the Company redeem or CallCo purchase, together with a duly executed Retraction Request and such additional documents and instruments specified in Section 26.6(a)(i) or that the Company or the Transfer Agent may reasonably require, and provided that (A) the Retraction Request has not been revoked by the holder of such Retracted Shares in the manner specified in Section 26.6(a)(iv), and (B) CallCo has not exercised the Retraction Call Right, the Company shall redeem or CallCo shall purchase, as applicable, the Retracted Shares effective at the close of business on the Retraction Date. On the Retraction Date, the Company or CallCo shall deliver or cause to be delivered to such holder, at the address of the holder recorded in the securities register of the Company for the Exchangeable Shares or at the address specified in the Retraction Request or by holding for pick-up by the holder at any office of the Transfer Agent as may be specified by the Company by notice to the holders of the Exchangeable Shares, the Exchangeable Share Consideration representing the Retraction Price and such delivery of such Exchangeable Share Consideration by or on behalf of the Company by the Transfer Agent shall be deemed to be payment of and shall satisfy and discharge all liability for the Retraction Price to the extent that the same is represented by such Exchangeable Share Consideration, unless any cheque comprising part of such Exchangeable Share Consideration is not paid on due presentation. If only a part of the Exchangeable Shares represented by any Exchangeable Share Document is redeemed or purchased, a new Exchangeable Share Document for the balance of such Exchangeable Shares shall be issued to the holder at the expense of the Company. On and after the close of business on the Retraction Date, the holder of the Retracted Shares shall cease to be a holder of such Retracted Shares and shall not be entitled to exercise any of the rights of a holder in respect thereof (including, without limitation, any rights under the Voting and Exchange Trust Agreement), other than the right to receive the aggregate Retraction Price in respect thereof, unless payment of the aggregate Retraction Price payable to such holder shall not be made upon presentation and surrender of the Exchangeable Share Documents and other required documents in accordance with the foregoing provisions, in which case the rights of such holder shall remain unaffected until such aggregate Retraction Price has been paid in the manner so provided. On and after the close of business on the Retraction Date, provided that presentation and surrender of the Exchangeable Share Documents and payment of such aggregate Retraction Price has been made in accordance with the foregoing provisions, the holder of the Retracted Shares so redeemed by the Company shall thereafter be considered and deemed for all purposes to be a holder of the Delaware Common Stock delivered to such holder.

Notwithstanding any other provision of this Section 26.6, the Company shall not be obligated to redeem Retracted Shares specified by a holder in a Retraction Request if and to the extent that such redemption or purchase of Retracted Shares, as applicable, would be contrary to solvency requirements or other provisions of applicable Laws. If the Company believes, after due enquiry, that on any Retraction Date it would not be permitted by any of such provisions to redeem the Retracted Shares tendered for redemption on such date, and provided that (A) CallCo has not exercised the Retraction Call Right with respect to such Retracted Shares, and (B) the holder has not required that CallCo purchase such Retracted Shares as contemplated under Section 26.6(a)(i), then the Company shall only be obligated to redeem Retracted Shares specified by a holder in a Retraction Request to the extent of the maximum number that may be so redeemed (rounded down to a whole number of shares) as would not be contrary to such provisions and shall notify the holder and the Share Trustee at least two Business Days prior to the Retraction Date as to the number of Retracted Shares which will not be redeemed by the Company. In any case in which the redemption by the Company of Retracted Shares would be contrary to solvency requirements or other provisions of applicable Laws, the Company shall redeem Retracted Shares in accordance with Section 26.6(a)(ii) on a pro rata basis in proportion to the total number of Exchangeable Shares tendered for retraction and shall issue to each holder of Retracted Shares a new Share Exchange Document, at the expense of the Company, representing the Retracted Shares not

redeemed by the Company pursuant to Section 26.6(a)(ii). If the Company would otherwise be obligated to redeem Retracted Shares pursuant to Section 26.6(a)(ii) but is not obligated to do so as a result of solvency requirements or other provisions of applicable Laws, the holder of any such Retracted Shares not redeemed by the Company pursuant to Section 26.6(a)(ii) as a result of solvency requirements or other provisions of applicable Laws shall be deemed, by delivery of the Retraction Request, to have instructed the Transfer Agent to require CallCo to purchase such Retracted Shares from such holder on the Retraction Date or as soon as practicable thereafter on payment by CallCo to such holder of the aggregate Retraction Price in respect of such Retracted Shares, all as more specifically provided for in the Voting and Exchange Trust Agreement.

A holder of Retracted Shares may, by notice in writing given by the holder to any office of the Transfer Agent as may be specified by the Company by notice to the holders of the Exchangeable Shares, before the close of business on the Business Day immediately preceding the Retraction Date, withdraw its Retraction Request, in which event such Retraction Request shall be null and void and, for greater certainty, the revocable offer constituted by the Retraction Request to sell the Retracted Shares to CallCo shall be deemed to have been revoked.

Notwithstanding any other provision of this Section 26.6(a), if:

exercise of the rights of the holders of the Exchangeable Shares, or any of them, to require the Company to redeem any Exchangeable Shares pursuant to this Section 26.6(a) on any Retraction Date would require listing particulars or any similar document to be issued in order to obtain the approval of the NYSE to the listing and trading (subject to official notice of issuance) of the Delaware Common Stock that would be required to be delivered to such holders of Exchangeable Shares in connection with the exercise of such rights; and

as a result of (A) above, it would not be practicable (notwithstanding the reasonable endeavours of Parent) to obtain such approvals in time to enable all or any of such Delaware Common Stock to be admitted to listing and trading by the NYSE (subject to official notice of issuance) when so delivered; the Retraction Date shall, notwithstanding any other date specified or otherwise deemed to be specified in any relevant Retraction Request, be deemed for all purposes to be the earlier of (i) the second Business Day immediately following the date the approvals referred to in Section 26.6(a)(v)(A) are obtained and (ii) the date which is 30 Business Days after the date on which the relevant Retraction Request is received by the Company, and references in these Exchangeable Share Provisions to such Retraction Date shall be construed accordingly.

Retraction Call Rights

In the event that a holder of Exchangeable Shares delivers a Retraction Request pursuant to Section 26.6(a), and subject to the limitations set forth in Section 26.6(a)(ii), the Retraction Call Right will be available to CallCo, notwithstanding the proposed redemption of the Exchangeable Shares by the Company pursuant to Section 26.6(a), to purchase from such holder on the Retraction Date all but not less than all of the Retracted Shares held by such holder on payment by CallCo of an amount per share equal to the Exchangeable Share Price applicable on the last Business Day prior to the Retraction Date (the “Retraction Call Right Purchase Price”), which price shall be satisfied in full by CallCo delivering or causing to be delivered to such holder the Exchangeable Share Consideration representing the Retraction Call Right Purchase Price. Upon the exercise of the Retraction Call Right in respect of Retracted Shares, the holder of such Retracted Shares shall be obligated to sell all of such Retracted Shares to CallCo on the Retraction Date on payment by CallCo of the aggregate Retraction Call Right Purchase Price in respect of such Retracted Shares as set forth in this Section 26.6(b)(i).

Upon receipt by the Transfer Agent of a Retraction Request, the Transfer Agent shall immediately notify the Company and CallCo thereof and shall provide CallCo with a copy of the Retraction

Request. In order to exercise its Retraction Call Right, CallCo must notify the Transfer Agent in writing of its determination to do so (a “Retraction Call Notice”) within five Business Days after the Transfer Agent notifies CallCo of the Retraction Request. If CallCo does not so notify the Transfer Agent within such five Business Day period, then the Transfer Agent shall notify the holder as soon as possible thereafter that CallCo will not exercise the Retraction Call Right. If CallCo delivers a Retraction Call Notice within such five Business Day period and duly exercises its Retraction Call Right in accordance with this Section 26.6(b)(ii), the obligation of the Company to redeem the Retracted Shares shall terminate and, provided that the Retraction Request is not revoked by the holder of such Retracted Shares in the manner specified in Section 26.6(a)(iv), CallCo shall purchase from such holder and such holder shall sell to CallCo on the Retraction Date the Retracted Shares for an amount per share equal to the Retraction Call Right Purchase Price. Provided that the aggregate Retraction Call Right Purchase Price has been so deposited with the Transfer Agent as provided in Section 26.6(b)(iii), the closing of the purchase and sale of the Retracted Shares pursuant to the Retraction Call Right shall be deemed to have occurred as at the close of business on the Retraction Date and, for greater certainty, no redemption by the Company of such Retracted Shares shall take place on the Retraction Date.

For the purpose of completing a purchase of Retracted Shares pursuant to the exercise of the Retraction Call Right, CallCo shall deliver or cause to be delivered to the holder of such Retracted Shares, at the address of the holder recorded in the securities register of the Company for the Exchangeable Shares or at the address specified in the holder’s Retraction Request or by holding for pick-up by the holder at any office of the Transfer Agent as may be specified by the Company by notice to the holders of Exchangeable Shares, the Exchangeable Share Consideration representing the Retraction Call Right Purchase Price to which such holder is entitled, and such delivery of Exchangeable Share Consideration on behalf of CallCo shall be deemed to be payment of and shall satisfy and discharge all liability for the Retraction Call Right Purchase Price to the extent that the same is represented by such Exchangeable Share Consideration, unless any cheque comprising part of such Exchangeable Share Consideration is not paid on due presentation.

If CallCo does not notify the Transfer Agent in accordance with Section 26.6(b)(ii) of its intention to exercise the Retraction Call Right in the manner and timing described therein, each holder of Exchangeable Shares will, at the holder’s discretion, be entitled to demand (by way of notice given to the Transfer Agent) that CallCo exercise the Retraction Call Right in respect of the shares covered by the notice.

On and after the close of business on the Retraction Date, the holder of the Retracted Shares shall cease to be a holder of such Retracted Shares and shall not be entitled to exercise any of the rights of a holder in respect thereof (including, without limitation, any rights under the Voting and Exchange Trust Agreement), other than the right to receive the aggregate Retraction Call Right Purchase Price in respect thereof, unless payment of the aggregate Retraction Call Right Purchase Price payable to such holder shall not be made upon presentation and surrender of Exchangeable Share Documents and other required documents in accordance with the foregoing provisions, in which case the rights of such holder shall remain unaffected until such aggregate Retraction Call Right Purchase Price has been paid in the manner so provided. On and after the close of business on the Retraction Date, provided that presentation and surrender of Exchangeable Share Documents and payment of such aggregate Retraction Call Right Purchase Price has been made in accordance with the foregoing provisions, the holder of the Retracted Shares so purchased by CallCo shall thereafter be considered and deemed for all purposes to be a holder of the Delaware Common Stock delivered to such holder.

Redemption Amount. Subject to applicable Laws and the due exercise by CallCo of the Redemption Call Right, the Company shall on the Redemption Date redeem all but not less than all of the then

outstanding Exchangeable Shares (other than Exchangeable Shares held by Parent and its affiliates) for an amount per share (the “Redemption Price”) equal to the Exchangeable Share Price on the last Business Day prior to the Redemption Date, which price shall be satisfied in full by the Company delivering or causing to be delivered to each holder of Exchangeable Shares the Exchangeable Share Consideration for each Exchangeable Share held by such holder.

Notice of Redemption. In the case of a redemption of Exchangeable Shares pursuant to Section 26.7(a), the Company shall, at least 30 days before the Redemption Date (other than a Redemption Date established in connection with a Parent Control Transaction), send or cause to be sent to each holder of Exchangeable Shares a notice in writing of the redemption by the Company or the purchase by CallCo under the Redemption Call Right of the Exchangeable Shares held by such holder. In the case of a Redemption Date established in connection with a Parent Control Transaction, the written notice of the redemption by the Company or the purchase by CallCo of the Exchangeable Shares under the Redemption Call Right will be sent on or before the Redemption Date, on as many days’ prior written notice as may be determined by the Board of Directors to be reasonably practicable in the circumstances. In any such case, such notice shall set out the formula for determining the Redemption Price or the Redemption Call Purchase Price, as the case may be, the Redemption Date and, if applicable, particulars of the Redemption Call Right. In the case of any notice given in connection with a possible Redemption Date, such notice will be given contingently and will be withdrawn if the contingency does not occur.

Payment of Redemption Price. On or promptly after the Redemption Date, and provided that the Redemption Call Right has not been exercised by CallCo, the Company shall deliver or cause to be delivered to the holders of the Exchangeable Shares to be redeemed the Redemption Price for each such Exchangeable Share, upon presentation and surrender of the Exchangeable Share Document representing such Exchangeable Shares, together with such other documents and instruments as may be required to effect a transfer of Exchangeable Shares under the BCBCA and these Articles, as applicable, together with such additional documents, instruments and payments as the Transfer Agent or the Company may reasonably require, at any office of the Transfer Agent as may be specified by notice to the holders of the Exchangeable Shares. Payment of the Redemption Price for such Exchangeable Shares shall be made by delivery to each holder, at the address of the holder recorded in the securities register of the Company for the Exchangeable Shares or by holding for pick-up by the holder at the registered office of the Transfer Agent as may be specified by the Company by notice to the holders of Exchangeable Shares, the Exchangeable Share Consideration representing the Redemption Price. On and after the Redemption Date, the holders of the Exchangeable Shares called for redemption shall cease to be holders of such Exchangeable Shares and shall not be entitled to exercise any of the rights of holders in respect thereof (including, without limitation, any rights under the Voting and Exchange Trust Agreement) other than the right to receive, without interest, their proportionate part of the aggregate Redemption Price, unless payment of the aggregate Redemption Price for such Exchangeable Shares shall not be made upon presentation and surrender of Exchangeable Share Documents in accordance with the foregoing provisions, in which case the rights of the holders shall remain unaffected until the Redemption Price has been paid in the manner so provided. The Company shall have the right at any time after the sending of notice of its intention to redeem the Exchangeable Shares as provided to deposit or cause to be deposited the aggregate Redemption Price (in the form of Exchangeable Share Consideration) of the Exchangeable Shares so called for redemption, or of such of the said Exchangeable Shares represented by Exchangeable Share Documents that have not at the date of such deposit been surrendered by the holders thereof in connection with such redemption, in a custodial account with any chartered bank or trust company in Canada named in such notice and any interest earned on such deposit shall belong to the Company. Provided that such aggregate Redemption Price has been so deposited prior to the Redemption Date, on and after the Redemption Date, the Exchangeable Shares in respect of which such deposit shall have been made shall be redeemed and the rights of the holders thereof after the Redemption Date shall be limited to receiving, without interest, their proportionate part of the aggregate Redemption Price for

such Exchangeable Shares so deposited, against presentation and surrender of the Exchangeable Share Documents for the Exchangeable Shares held by them, respectively, in accordance with the foregoing provisions. Upon such payment or deposit of the Redemption Price, the holders of the Exchangeable Shares shall thereafter be considered and deemed for all purposes to be holders of the Delaware Common Stock delivered to them or the custodian on their behalf.

Amendment. The rights, privileges, restrictions and conditions attaching to the Exchangeable Shares may be added to, changed or removed only with the approval of the holders of the Exchangeable Shares given as specified below.

Approval. Any approval given by the holders of the Exchangeable Shares to add to, change or remove any right, privilege, restriction or condition attaching to the Exchangeable Shares or any other matter requiring the approval or consent of the holders of the Exchangeable Shares either in accordance with applicable Laws or as expressly provided under these Exchangeable Share Provisions shall be deemed to have been sufficiently given if it shall have been given in accordance with applicable Laws, subject to a minimum requirement that such approval be evidenced by resolution passed by not less than two-thirds of the votes cast on such resolution at a meeting of holders of Exchangeable Shares duly called and held at which the holders of at least 10% of the outstanding Exchangeable Shares at that time are present or represented by proxy; provided, however, that if at any such meeting the holders of at least 10% of the outstanding Exchangeable Shares at that time are not present or represented by proxy within one-half hour after the time appointed for such meeting, then the meeting shall be adjourned to such date not less than five days thereafter and to such time and place as may be designated by the Chair of such meeting. At such adjourned meeting, the holders of Exchangeable Shares present or represented by proxy thereat may transact the business for which the meeting was originally called and a resolution passed thereat by the affirmative vote of not less than two-thirds of the votes cast on such resolution at such meeting shall constitute the approval or consent of the holders of the Exchangeable Shares.

Acknowledgement in Respect of Issuances or Distributions. The Company and each holder of an Exchangeable Share acknowledges that the Support Agreement provides, in part, that Parent will not, except as provided in the Support Agreement, without the prior approval of the Company and the prior approval of the holders of the Exchangeable Shares given in accordance with Section 26.11(b):

issue or distribute Delaware Common Stock (or securities exchangeable for or convertible into or carrying rights to acquire Delaware Common Stock) to the holders of all or substantially all of the then outstanding Delaware Common Stock by way of stock or share dividend or other distribution,

other than an issue of Delaware Common Stock (or securities exchangeable for or convertible into or carrying rights to acquire Delaware Common Stock) to holders of Delaware Common Stock who exercise an option to receive dividends in Delaware Common Stock (or securities exchangeable for or convertible into or carrying rights to acquire Delaware Common Stock) in lieu of receiving cash dividends, or pursuant to any dividend reinvestment plan or scrip dividend or similar arrangement;

issue or distribute rights, options or warrants to the holders of all or substantially all of the then outstanding Delaware Common Stock entitling them to subscribe for or to purchase Delaware Common Stock (or securities exchangeable for or convertible into or carrying rights to acquire Delaware Common Stock); or

issue or distribute to the holders of all or substantially all of the then outstanding Delaware Common Stock:

shares or securities of Parent of any class other than Delaware Common Stock (or securities convertible into or exchangeable for or carrying rights to acquire Delaware Common Stock);

rights, options or warrants other than those referred to in Section 26.12(a)(ii) above;

evidence of indebtedness of Parent; or

assets of Parent;

Acknowledgement in Respect of Corporate Changes. Each holder of an Exchangeable Share acknowledges that the Support Agreement further provides, in part, that for so long as any Exchangeable Shares not owned by Parent or its affiliates are outstanding, Parent will not without the prior approval of the Company and the prior approval of the holders of the Exchangeable Shares given in accordance with Section 26.11(b):

subdivide, redivide or change the then outstanding Delaware Common Stock into a greater number of Delaware Common Stock;

reduce, combine, consolidate or change the then outstanding Delaware Common Stock into a lesser number of Delaware Common Stock; or

reclassify or otherwise change the Delaware Common Stock or effect an amalgamation, merger, reorganization or other transaction affecting the Delaware Common Stock;

Successorship Transaction. Notwithstanding the foregoing provisions of this Section 26.12, in the event of a Parent Control Transaction:

in which Parent merges or amalgamates with, or in which all or substantially all of the then outstanding Delaware Common Stock are acquired by one or more other corporations to which Parent is, immediately before such merger, amalgamation or acquisition, related within the meaning of the Income Tax Act (Canada) (otherwise than by virtue of a right referred to in paragraph 251(5)(b) thereof);

which does not result in an acceleration of the Redemption Date in accordance with paragraph (ii) of the definition of such term in Section 26.1(a); and

in which all or substantially all of the then outstanding Delaware Common Stock are converted into or exchanged for shares or rights to receive such shares (the “Other Shares”) of another corporation (the “Other Corporation”) that, immediately after such Parent Control Transaction, owns or controls, directly or indirectly, Parent;

Actions by the Company. The Company will take all such actions and do all such things as shall be necessary or advisable to perform and comply with and to ensure performance and compliance by Parent, CallCo and the Company with all provisions of the Support Agreement and the Voting and Exchange Trust Agreement applicable to Parent, CallCo and the Company, respectively, in accordance with the terms thereof including taking all such actions and doing all such things as shall be necessary or advisable to enforce to the fullest extent possible for the direct benefit of the Company all rights and benefits in favour of the Company under or pursuant to such agreements.

Changes to Support Agreement or Voting and Exchange Trust Agreement. The Company shall not propose, agree to or otherwise give effect to any amendment to, or waiver or forgiveness of its rights or obligations under, the Support Agreement or the Voting and Exchange Trust Agreement without the approval of the holders of the Exchangeable Shares given in accordance with Section 26.11(b) other than such amendments, waivers and/or forgiveness as may be necessary or advisable for the purposes of:

adding to the covenants of any or all of the other parties to the Support Agreement or the Voting and Exchange Trust Agreement if the board of directors of each of Parent, CallCo and the Company shall be of the good faith opinion that such additions will not be prejudicial to the rights or interests of the holders of the Exchangeable Shares;

evidencing the succession of successors to Parent either by operation of Law or agreement to the liabilities and covenants of Parent under the Support Agreement (“Parent Successors”) and the covenants of and obligations assumed by each such Parent Successor in accordance with the provisions of Article 3 of the Support Agreement;

making such amendments or modifications not inconsistent with the Support Agreement and the Voting and Exchange Trust Agreement as may be necessary or desirable with respect to matters or questions arising thereunder which, in the good faith opinion of the board of directors of each of Parent, CallCo and the Company, it may be expedient to make, provided that each such board of directors shall be of the good faith opinion, after consultation with counsel, that such amendments and modifications will not be prejudicial to the rights or interests of the holders of the Exchangeable Shares; or

making such changes in or corrections to the Support Agreement and the Voting and Exchange Trust Agreement which, on the advice of counsel to Parent, CallCo and the Company, are required for the purpose of curing or correcting any ambiguity or defect or inconsistent provision or clerical omission or mistake or manifest error contained therein, provided that the board of directors of each of Parent, CallCo and the Company shall be of the good faith opinion that such changes or corrections will not be prejudicial to the rights or interests of the holders of the Exchangeable Shares.

Legend. The Exchangeable Share Documents evidencing the Exchangeable Shares shall contain or have affixed thereto a legend in form and on terms approved by the Board of Directors with respect to the Support Agreement, including provisions relating to the Liquidation Call Right, the Redemption Call Right and the Change of Law Call Right, the Voting and Exchange Trust Agreement (including the provisions with respect to the voting rights and automatic exchange thereunder) and the Retraction Call Right.

Call Rights. Each holder of an Exchangeable Share, whether of record or beneficial, by virtue of becoming and being such a holder shall be deemed to acknowledge each of the Liquidation Call Right, the Redemption Call Right, the Change of Law Call Right and the Retraction Call Right, in each case, in favour of CallCo, and the overriding nature thereof in connection with the liquidation, dissolution or winding-up of the Company or any other distribution of the assets of the Company among its shareholders for the purpose of winding up its affairs, or the retraction or redemption of Exchangeable Shares, as the case may be, and to be bound thereby in favour of CallCo as provided herein and in the Support Agreement.

Withholding Rights. Each of Parent, the Company, CallCo, the Transfer Agent and any other person that has any withholding obligation with respect to any amount paid, deemed paid or otherwise deliverable to any holder of Exchangeable Shares (any such person, an “Other Withholding Agent”) shall be entitled to deduct and withhold or direct Parent, the Company, CallCo, the Transfer Agent, or any Other Withholding Agent to deduct and withhold on their behalf, from any amount or consideration paid, deemed paid or otherwise deliverable to any holder of Exchangeable Shares such amounts as are required to be deducted or withheld with respect to such payment or deemed payment under the Income Tax Act (Canada) or United States Tax Laws or any provision of federal, provincial, territorial, state, local, foreign or other Tax Law, in each case, as amended or succeeded. Parent, the Company, CallCo, the Transfer Agent, or any Other Withholding Agent may act and rely on the advice of counsel with respect to such matters. To the extent that amounts are so deducted or withheld, such

deducted or withheld amounts shall be treated for all purposes as having been paid to the holder of the Exchangeable Shares to whom such amounts would otherwise have been paid or deemed paid and such deducted or withheld amounts shall be timely remitted to the appropriate Governmental Authority as required by applicable Law. To the extent that the amount so required to be deducted or withheld from any payment or deemed payment to a holder exceeds the cash portion of the amount or consideration otherwise payable to the holder (such difference, a “Withholding Shortfall”), Parent, the Company, CallCo, the Transfer Agent, and any Other Withholding Agent are hereby authorized to (A) (i) sell or otherwise dispose of, or direct Parent, the Company, CallCo, the Transfer Agent or any Other Withholding Agent to sell or otherwise dispose of, on their own account or through a broker (the “Broker”) and on behalf of the relevant holder or (ii) require such holder to irrevocably direct the sale through a Broker and irrevocably direct the Broker pay the proceeds of such sale to Parent, the Company, CallCo, the Transfer Agent or any Other Withholding Agent, as appropriate (and, in the absence of such irrevocable direction, the holder shall be deemed to have provided such irrevocable direction), such portion of the amount or consideration as is necessary to provide sufficient funds (after deducting commissions payable to the Broker and other costs and expenses) to Parent, the Company, CallCo, the Transfer Agent or any Other Withholding Agent, as the case may be, to enable it to comply with such deduction or withholding requirement and Parent, the Company, CallCo, the Transfer Agent or any Other Withholding Agent, as the case may be, shall notify the holder thereof and remit to such holder any unapplied balance of the net proceeds of such sale or (B) require such holder to deliver a Retraction Request for a number of Exchangeable Shares that would entitle such holder to net proceeds greater than or equal to the Withholding Shortfall and withhold the Withholding Shortfall from such net proceeds and remit to such holder any unapplied balance of the net proceeds. Each of Parent, CallCo, the Company, the Transfer Agent, the Broker or any Other Withholding Agent, as applicable, shall act in a commercially reasonable manner in respect of any withholding obligation; however, none of Parent, the Company, CallCo, the Transfer Agent, the Broker or any Other Withholding Agent, as applicable, will be liable for any loss arising out of any sale or other disposal of such consideration, including any loss relating to the manner or timing of such sale or other disposal, the prices at which the consideration is sold or otherwise disposed of or otherwise.

Notices. Subject to applicable Laws, and except as otherwise provided herein, any notice, request or other communication to be given to the Company or the Transfer Agent by a holder of Exchangeable Shares shall be in writing and shall be valid and effective if given by first class mail (postage prepaid) or personal delivery or delivery by courier to the registered office of the Company or Transfer Agent, as applicable, and in each case, addressed to the attention of the Secretary of the Company. Any such notice, request or other communication, if given by mail or delivery, shall only be deemed to have been given and received upon actual receipt thereof by the Company or the Transfer Agent, as applicable.

Exchangeable Share Documents. Any presentation and surrender by a holder of Exchangeable Shares to the Company or the Transfer Agent of Exchangeable Share Documents representing Exchangeable Shares in connection with the liquidation, dissolution or winding-up of the Company or the retraction. redemption or purchase of Exchangeable Shares shall be made by first class mail (postage prepaid) or by personal delivery or delivery by to such office of the Transfer Agent as may be specified by the Company, in each case, addressed to the attention of the Secretary of the Company. Any such presentation and surrender of Exchangeable Share Documents shall only be deemed to have been made and to be effective upon actual receipt thereof by the Transfer Agent. Any such presentation and surrender of Exchangeable Share Documents made by first class mail (postage prepaid) shall be at the sole risk of the holder mailing the same.

Notice to Shareholders.

Subject to applicable Laws, any notice, request or other communication to be given to a holder of Exchangeable Shares by or on behalf of the Company shall be in writing and shall be valid and

effective if given by first class mail (postage prepaid) or by personal delivery or delivery by courier to the address of the holder recorded in the register of shareholders of the Company or, in the event of the address of any such holder not being so recorded, then at the last known address of such holder. Any such notice, request or other communication, if given by mail, shall be deemed to have been given and received on the third Business Day following the date of mailing and, if given by delivery, shall be deemed to have been given and received on the date of delivery. Accidental failure or omission to give any notice, request or other communication to one or more holders of Exchangeable Shares shall not invalidate or otherwise alter or affect any action or proceeding to be taken by the Company pursuant thereto.

In the event of any interruption of mail service immediately prior to a scheduled mailing or in the period following a mailing during which delivery normally would be expected to occur, the Company shall make reasonable efforts to disseminate any notice by other means, such as publication. Except as otherwise required or permitted by Law, if post offices in Canada are not open for the deposit of mail, any notice which the Company or the Transfer Agent may give or cause to be given hereunder will be deemed to have been properly given and to have been received by holders of Exchangeable Shares it is published once in the national edition of The Globe and Mail and in a daily newspaper of general circulation in the French language in the City of Montreal, provided that if the national edition of The Globe and Mail is not being generally circulated, publication thereof will be made in the National Post or any other daily newspaper of general circulation published in the City of Toronto.

Notwithstanding any other provisions of these Exchangeable Share Provisions, notices, other communications and deliveries need not be mailed if the Company determines that delivery thereof by mail may be delayed. Persons entitled to any deliveries (including Exchangeable Share Documents and cheques) which are not mailed for the foregoing reason may take delivery thereof at the office of the Transfer Agent to which the deliveries were made, upon application to the Transfer Agent, until such time as the Company has determined that delivery by mail will no longer be delayed. The Company will provide notice of any such determination not to mail made hereunder as soon as reasonably practicable after the making of such determination and in accordance with this Section 26.15(c). Such deliveries in such circumstances will constitute delivery to the persons entitled thereto.

CallCo shall have the overriding right (the “Liquidation Call Right”), in the event of and notwithstanding the proposed liquidation, dissolution or winding-up of the Company or any other distribution of the assets of the Company among its shareholders for the purpose of winding up its affairs, pursuant to these Exchangeable Share Provisions, and subject to the purchase and sale contemplated by the Automatic Exchange Right, to purchase from all but not less than all of the holders of the Exchangeable Shares (other than any holder of Exchangeable Shares which is Parent or any of its affiliates) on the Liquidation Date all but not less than all of the Exchangeable Shares held by each such holder upon payment by CallCo to each such holder of the Exchangeable Share Price (payable in the form of the Exchangeable Share Consideration) applicable on the last Business Day prior to the Liquidation Date (the “Liquidation Call Purchase Price”) in accordance with Section 26.18(c). In the event of the exercise of the Liquidation Call Right by CallCo each such holder of Exchangeable Shares (other than Parent and its affiliates) shall be obligated to sell all of the Exchangeable Shares held by the holder to CallCo on the Liquidation Date upon payment by CallCo to such holder of the Liquidation Call Purchase Price (payable in the form of Exchangeable Share Consideration) for each such share, and the Company shall have no obligation to pay any Liquidation Amount to the holders of such shares so purchased.

To exercise the Liquidation Call Right, CallCo must notify the Transfer Agent, as agent for the holders of the Exchangeable Shares, and the Company of its intention to exercise such right (i) in the case of a voluntary liquidation, dissolution or winding-up of the Company or any other voluntary distribution of the assets of the Company among its shareholders for the purpose of winding up its affairs, at least fifteen (15) Business Days before the Liquidation Date, or (ii) in the case of an involuntary liquidation, dissolution or winding-up of the Company or any other involuntary distribution of the assets of the Company among its shareholders for the purpose of winding up its affairs, at least five (5) Business Days before the Liquidation Date. The Transfer Agent will notify the holders of the Exchangeable Shares as to whether or not CallCo has exercised the Liquidation Call Right forthwith after the expiry of the period during which CallCo may exercise the Liquidation Call Right. If CallCo exercises the Liquidation Call Right, then on the Liquidation Date, CallCo will purchase and the holders of the Exchangeable Shares (other than any holder of Exchangeable Shares which is Parent or any of its affiliates) will sell, all of the Exchangeable Shares held by such holders on such date for a price per share equal to the Liquidation Call Purchase Price (payable in the form of Exchangeable Share Consideration).

Subject to Section 26.18(d), for the purposes of completing the purchase and sale of the Exchangeable Shares pursuant to the exercise of the Liquidation Call Right, CallCo shall deposit or cause to be deposited with the Transfer Agent, on or before the Liquidation Date, the Exchangeable Share Consideration representing the aggregate Liquidation Call Purchase Price for all holders of the Exchangeable Shares (other than Parent and its affiliates). Provided that such Exchangeable Share Consideration has been so deposited with the Transfer Agent, the holders of the Exchangeable Shares (other than Parent and its affiliates) shall cease to be holders of the Exchangeable Shares on and after the Liquidation Date and, from and after such date, shall not be entitled to exercise any of the rights of holders in respect thereof (including, without limitation, any rights under the Voting and Exchange Trust Agreement) other than the right to receive their proportionate part of the aggregate Liquidation Call Purchase Price, without interest, upon presentation and surrender by the holder of Exchangeable Share Documents representing the Exchangeable Shares held by such holder and the holder shall on and after the Liquidation Date be considered and deemed for all purposes to be the holder of the Delaware Common Stock which such holder is entitled to receive. Upon surrender to the Transfer Agent of Exchangeable Share Documents representing Exchangeable Shares, together with such other documents and instruments as may be required to effect a transfer of Exchangeable Shares under the BCBCA and these Articles, as applicable, and such additional documents, instruments and payments as the Transfer Agent may reasonably require, the holder shall be entitled to receive, in exchange therefor, and the Transfer Agent on behalf of CallCo, shall deliver to such holder the Exchangeable Share Consideration such holder is entitled to receive.

If CallCo does not notify the Transfer Agent and the Company in accordance with Section 26.18(b) of its intention to exercise the Liquidation Call Right in the manner and timing described above, each holder of Exchangeable Shares will, at the holder’s discretion, be entitled to demand (by way of notice given to the Company) that CallCo exercise the Liquidation Call Right in respect of the shares covered by the notice, in which case, CallCo shall be deemed of have exercised the Liquidation Call Right and will be bound thereby.

Notwithstanding the proposed redemption of the Exchangeable Shares by the Company pursuant to these Exchangeable Share Provisions, CallCo shall have the overriding right (the “Redemption Call Right”) to purchase from all but not less than all of the holders of the Exchangeable Shares (other than any holder of Exchangeable Shares which is Parent or any of its affiliates) on the Redemption Date all but not less than all of the Exchangeable Shares held by each such holder upon payment by CallCo to each such holder of the Exchangeable Share Price (payable in the form of the Exchangeable Share Consideration) applicable on the last Business Day prior to the Redemption Date (the “Redemption Call Purchase Price”) in accordance with Section 26.19(c). In the event of the exercise of the Redemption Call Right by CallCo, each such holder of Exchangeable Shares (other than Parent and its affiliates) shall be obligated to sell all of the Exchangeable Shares held by the holder to CallCo on the Redemption Date upon payment by CallCo to such holder of the Redemption Call Purchase Price (payable in the form of Exchangeable Share Consideration) for each such share, and the Company shall have no obligation to redeem, or to pay the redemption price otherwise payable by the Company in respect of the Exchangeable Shares so purchased.

To exercise the Redemption Call Right, CallCo must notify the Transfer Agent, as agent for the holders of the Exchangeable Shares, and the Company of its intention to exercise such right (i) in the case of a redemption occurring in connection with a Parent Control Transaction, on or before the Redemption Date, and (ii) in any other case, at least fifteen (15) Business Days before the Redemption Date. The Transfer Agent will notify the holders of the Exchangeable Shares as to whether or not CallCo has exercised the Redemption Call Right forthwith after the expiry of the period during which CallCo may exercise the Redemption Call Right. If CallCo exercises the Redemption Call Right, CallCo will purchase and the holders of the Exchangeable Shares (other than any holder of Exchangeable Shares which is Parent or any of its affiliates) will sell, on the Redemption Date, all of the Exchangeable Shares held by such holders on such date for a price per share equal to the Redemption Call Purchase Price (payable in the form of Exchangeable Share Consideration).

Subject to Section 26.19(d), for the purposes of completing the purchase and sale of the Exchangeable Shares pursuant to the exercise of the Redemption Call Right, CallCo shall deposit or cause to be deposited with the Transfer Agent, on or before the Redemption Date, the Exchangeable Share Consideration representing the aggregate Redemption Call Purchase Price for all holders of the Exchangeable Shares (other than Parent and its affiliates). Provided that such Exchangeable Share Consideration has been so deposited with the Transfer Agent, the holders of the Exchangeable Shares (other than Parent and its affiliates) shall cease to be holders of the Exchangeable Shares on and after the Redemption Date and, from and after such date, shall not be entitled to exercise any of the rights of holders in respect thereof (including, without limitation, any rights under the Voting and Exchange Trust Agreement) other than the right to receive their proportionate part of the aggregate Redemption Call Purchase Price, without interest, upon presentation and surrender by the holder of Exchangeable Share Documents representing the Exchangeable Shares held by such holder and the holder shall on and after the Redemption Date be considered and deemed for all purposes to be the holder of the Delaware Common Stock which such holder is entitled to receive. Upon surrender to the Transfer Agent of Exchangeable Share Documents representing the Exchangeable Shares, together with such other documents and instruments as may be required to effect a transfer of Exchangeable Shares under

the BCBCA and these Articles, as applicable, and such additional documents, instruments and payments as the Transfer Agent may reasonably require, the holder shall be entitled to receive, in exchange therefor, and the Transfer Agent on behalf of CallCo shall deliver to such holder the Exchangeable Share Consideration such holder is entitled to receive.

If CallCo does not notify the Transfer Agent and the Company in accordance with Section 26.19(b) of its intention to exercise the Redemption Call Right in the manner and timing described above, each holder of Exchangeable Shares will, at the holder’s discretion, be entitled to demand (by way of notice given to the Company) that CallCo exercise the Redemption Call Right in respect of the shares covered by the notice, in which case, CallCo shall be deemed of have exercised the Redemption Call Right and will be bound thereby.

CallCo shall have the overriding right (the “Change of Law Call Right”), in the event of a Change of Law, to purchase from all but not less than all of the holders of the Exchangeable Shares (other than any holder of Exchangeable Shares which is Parent or any of its affiliates) on the Change of Law Call Date all but not less than all of the Exchangeable Shares held by each such holder upon payment by CallCo to each such holder of the Exchangeable Share Price (payable in the form of the Exchangeable Share Consideration) applicable on the last Business Day prior to the Change of Law Call Date (the “Change of Law Call Purchase Price”) in accordance with Section 26.20(b). In the event of the exercise of the Change of Law Call Right by CallCo each such holder of Exchangeable Shares (other than Parent and its affiliates) shall be obligated to sell all of the Exchangeable Shares held by the holder to CallCo on the Change of Law Call Date upon payment by CallCo to such holder of the Change of Law Call Purchase Price (payable in the form of Exchangeable Share Consideration) for each such share.

To exercise the Change of Law Call Right, CallCo must notify the Transfer Agent, as agent for the holders of the Exchangeable Shares, and the Company of its intention to exercise such right at least fifteen (15) Business Days before the date (the “Change of Law Call Date”) on which CallCo shall acquire the Exchangeable Shares pursuant to the exercise of the Change of Law Call Right. The Transfer Agent will notify the holders of the Exchangeable Shares as to CallCo exercising the Change of Law Call Right forthwith after receiving notice of such exercise from CallCo. If CallCo exercises the Change of Law Call Right, then on the Change if Law Call Date, CallCo will purchase and the holders of the Exchangeable Shares (other than any holder of Exchangeable Shares which is Parent or any of its affiliates) will sell, all of the Exchangeable Shares held by such holders on such date for a price per share equal to the Change of Law Call Purchase Price (payable in the form of Exchangeable Share Consideration).

Subject to Section 26.20(d), for the purposes of completing the purchase and sale of the Exchangeable Shares pursuant to the exercise of the Change of Law Call Right, CallCo shall deposit or cause to be deposited with the Transfer Agent, on or before the Change of Law Call Date, the Exchangeable Share Consideration representing the aggregate Change of Law Call Purchase Price for all holders of Exchangeable Shares (other than Parent and its affiliates). Provided that such Exchangeable Share Consideration has been so deposited with the Transfer Agent, the holders of the Exchangeable Shares (other than Parent and its affiliates) shall cease to be holders of the Exchangeable Shares on and after the Change of Law Call Date and, from and after such date, shall not be entitled to exercise any of the rights of holders in respect thereof (including, without limitation, any rights under the Voting and Exchange Trust Agreement) other than the right to receive their proportionate part of the aggregate Change of Law Call Purchase Price, without interest, upon presentation and surrender by the holder of Exchangeable Share Documents representing the Exchangeable Shares held by such holder and the holder shall on and after the Change of Law Call Date be considered and deemed for all purposes to be the holder of the Delaware Common Stock which such holder is entitled to receive. Upon surrender to

the Transfer Agent of a Exchangeable Share Documents representing Exchangeable Shares, together with such other documents and instruments as may be required to effect a transfer of Exchangeable Shares under the BCBCA and these Articles, as applicable, and such additional documents, instruments and payments as the Transfer Agent may reasonably require, the holder shall be entitled to receive, in exchange therefor, and the Transfer Agent on behalf of CallCo shall deliver to such holder the Exchangeable Share Consideration such holder is entitled to receive.

If CallCo does not notify the Transfer Agent and the Company in accordance with Section 26.20(b) of its intention to exercise the Change of Law Call Right in the manner and timing described above, each holder of Exchangeable Shares will, at the holder’s discretion, be entitled to demand (by way of notice given to the Company) that CallCo exercise the Change of Law Call Right in respect of the shares covered by the notice, in which case, CallCo shall be deemed of have exercised the Change of Law Call Right and will be bound thereby.

It is the intention of the Company, CallCo and Parent that the Exchangeable Shares are treated as shares of Parent for U.S. federal income tax purposes and the provisions of these Articles shall be interpreted in a manner consistent with the foregoing. The Company shall not take any position for U.S. federal income tax purposes that is inconsistent with the foregoing except to the extent otherwise required by a change in law (it being understood that this Section 26.20(e)shall not prevent the Company from taking any action that is explicitly contemplated in these Articles).

Computershare Trust Company of Canada (the “Share Trustee”)

Zymeworks CallCo ULC (“CallCo”)

all share(s) represented by this Exchangeable Share Document

             share(s) represented by this Exchangeable Share Document

is

is not

Please check box if the securities and any cheque(s) resulting from the purchase of the Exchangeable Shares are to be held for pick-up by the shareholder from the Transfer Agent, failing which such Exchangeable Share Document and cheque(s) will be mailed to the last address of the shareholder as it appears on the register.