The Hanover Insurance Group, Inc.

Master Confirmation—Uncollared Accelerated Share Repurchase

Account Details .

Account for payments to Counterparty:

Account for payments to Dealer:

Offices .

The Office of Counterparty for each Transaction is: Inapplicable, Counterparty is not a Multibranch Party.

The Office of Dealer for each Transaction is: Toronto

Notices .

Address for notices or communications to Counterparty:

Address for notices or communications to Dealer:

Representations, Warranties and Agreements .

Additional Representations, Warranties and Covenants of Each Party . In addition to the representations, warranties and covenants in the Agreement, each party represents, warrants and covenants to the other party that:

It is an “eligible contract participant” (as such term is defined in the Commodity Exchange Act, as amended).

The offer and sale of each Transaction to it is intended to be exempt from registration under the Securities Act of 1933, as amended (the “ Securities Act ”), by virtue of Section 4(a)(2) thereof. Accordingly, each party represents and warrants to the other that (A) it has the financial ability to bear the economic risk of its investment in each Transaction and is able to bear a total loss of its investment, (B) it is an “accredited investor” as that term is defined under Regulation D under the Securities Act and (C) the disposition of each Transaction is restricted under this Master Confirmation, the Securities Act and state securities laws.

Additional Representations, Warranties and Covenants of Counterparty . In addition to the representations, warranties and covenants in the Agreement, Counterparty represents, warrants and covenants to Dealer that:

As of the Trade Date for each Transaction hereunder, Counterparty is a corporation duly organized, validly existing and in good standing under the laws of the State of Delaware. Each of this Master Confirmation and the Supplemental Confirmation for such Transaction has been duly authorized, executed and delivered by Counterparty and (assuming due authorization, execution and delivery thereof by Dealer) this Master Confirmation, as supplemented by such Supplemental Confirmation, constitutes a valid and legally binding obligation of Counterparty. Counterparty has all corporate power to enter into this Master Confirmation and such Supplemental Confirmation and to consummate the transactions contemplated hereby and thereby and to purchase the Shares and deliver any Settlement Shares in accordance with the terms hereof and thereof.

As of the Trade Date for each Transaction hereunder, the execution and delivery by Counterparty of, and the performance by Counterparty of its obligations under, this Master Confirmation and the Supplemental Confirmation for such Transaction, and the consummation of the transactions herein and therein contemplated, do not conflict with or violate (A) any provision of the certificate of incorporation, by-laws or other constitutive documents of Counterparty, (B) any statute or order, rule, regulation or judgment of any court or governmental agency or body having jurisdiction over Counterparty or any of its subsidiaries or any of their respective assets or (C) any contractual restriction binding on or affecting Counterparty or any of its subsidiaries or any of its assets.

As of the Trade Date for each Transaction hereunder, all governmental and other consents that are required to have been obtained by Counterparty with respect to performance, execution and delivery of this Master Confirmation and the Supplemental Confirmation for such Transaction have been obtained and are in full force and effect and all conditions of any such consents have been complied with.

As of the Trade Date for each Transaction hereunder, (A) such Transaction is being entered into pursuant to a publicly disclosed Share buy-back program and its Board of Directors has approved the use of derivatives to effect the Share buy-back program, and (B) there is no internal policy of Counterparty, whether written or oral, that would prohibit Counterparty from entering into any aspect of such Transaction, including, without limitation, the purchases of Shares to be made pursuant to such Transaction.

As of the Trade Date for each Transaction hereunder, the purchase or writing of such Transaction and the transactions contemplated hereby will not violate Rule 13e-1 or Rule 13e-4 under the Exchange Act.

As of the Trade Date for each Transaction hereunder, it is not entering into such Transaction, and as of the date of any election with respect to any Transaction hereunder, it is not making such election, in each case (A) on the basis of, and is not aware of, any material non-public information regarding Counterparty or the Shares, (B) in anticipation of, in connection with, or to facilitate, a distribution of its securities, a self tender offer or a third-party tender offer in violation of the Exchange Act or (C) to create actual or apparent trading activity in the Shares (or any security convertible into or exchangeable for the Shares) or to raise or depress or otherwise manipulate the price of the Shares (or any security convertible into or exchangeable for the Shares).

Counterparty (A) is capable of evaluating investment risks independently, both in general and with regard to all transactions and investment strategies involving a security or securities; (B) will exercise independent judgment in evaluating the recommendations of any broker-dealer or its associated persons, unless it has otherwise notified the broker-dealer in writing; and (C) has total assets of at least USD 50,000,000 as of the date hereof.

As of the Trade Date for each Transaction hereunder, and as of the date of any election with respect to any Transaction hereunder, Counterparty is in compliance with its reporting obligations under the Exchange Act and its most recent Annual Report on Form 10-K, together with all reports subsequently filed by it pursuant to the Exchange Act, taken together and as amended and supplemented to the date of this representation, do not, as of their respective filing dates, contain any untrue statement of a material fact or omit to state any material fact required to be stated therein or necessary to make the statements therein, in the light of the circumstances under which they were made, not misleading.

Counterparty has made, and will make, all material filings required to be made by it with the Securities and Exchange Commission, any securities exchange or any other regulatory body with respect to each Transaction.

(A) The Shares are not, as of the Calculation Period Start Date, and (B) Counterparty will not, at any time during any Regulation M Period (as defined below) for any Transaction, cause the Shares to be, subject to a “restricted period” (as defined in Regulation M promulgated under the Exchange Act) unless, in the case of clause (B), Counterparty has provided written notice to Dealer of such restricted period not later than the Scheduled Trading Day immediately preceding the first day of such “restricted period”; Counterparty acknowledges that any such notice may cause a Disrupted Day to occur pursuant to Section 7 hereof; accordingly, Counterparty acknowledges that its delivery of such notice must comply with the standards set forth in Section 8 hereof. Counterparty is not currently contemplating any “distribution” (as defined in Regulation M promulgated under the Exchange Act) of Shares, or any security for which Shares are a “reference security” (as defined in Regulation M promulgated under the Exchange Act). “ Regulation M Period ” means, for any Transaction, (A) the Relevant Period (as defined below) for such Transaction, (B) the Settlement Valuation Period, if any, for such Transaction and (C) the Seller Termination Purchase Period (as defined below), if any, for such Transaction. “ Relevant Period ” means, for any Transaction, the period commencing on the Calculation Period Start Date for such Transaction and ending on the later of (1) the earlier of (x) the Scheduled Termination Date and (y) the last Additional Relevant Day (as specified in the related Supplemental Confirmation) for such Transaction, or such earlier day as elected by Dealer and communicated to Counterparty on such day (or, if later, the First Acceleration Date without regard to any acceleration thereof pursuant to “Special Provisions for Acquisition Transaction Announcements” below) and (2) if Section 15 hereof is applicable to such Transaction, the date on which all deliveries owed pursuant to such Section 15 have been made.

As of the Trade Date, the Prepayment Date, the Initial Share Delivery Date, the Settlement Date, any Cash Settlement Payment Date and any Settlement Method Election Date for each Transaction, Counterparty is not, and will not be, “insolvent” (as such term is defined under Section 101(32) of the U.S. Bankruptcy Code (Title 11 of the United States Code) (the “ Bankruptcy Code ”)) and Counterparty would be able to purchase a number of Shares with a value equal to the Prepayment Amount in compliance with the laws of the jurisdiction of Counterparty’s incorporation.

Counterparty is not, and after giving effect to each Transaction will not be, required to register as an “investment company” as such term is defined in the Investment Company Act of 1940, as amended.

[Reserved.]

Counterparty has not entered, and will not enter, into any repurchase transaction with respect to the Shares (or any security convertible into or exchangeable for the Shares) (including, without limitation, any agreements similar to the Transactions described herein) where any initial hedge period, calculation period, relevant period, settlement valuation period or seller termination purchase period (each however defined) in such other transaction will overlap at any time (including, without limitation, as a result of extensions in such initial hedge period, calculation period, relevant period, settlement valuation period or seller termination purchase period as provided in the relevant agreements) with any Relevant Period, any Settlement Valuation Period (if applicable) or any Seller Termination Purchase Period (if applicable) under this Master Confirmation. In the event that the initial hedge period, relevant period, calculation period or settlement valuation period in any other transaction overlaps with any Relevant Period, any Settlement Valuation Period (if applicable) or any Seller Termination Purchase Period (if applicable) under this Master Confirmation as a result of any postponement of the Scheduled Termination Date or extension of the Settlement Valuation Period pursuant to “Valuation Disruption” above or any analogous provision in such other transaction, Counterparty shall promptly amend such other transaction to avoid any such overlap.

Counterparty shall, at least one day prior to the first day of the Calculation Period, the Settlement Valuation Period, if any, or the Seller Termination Purchase Period, if any, for any Transaction, notify Dealer of the total number of Shares purchased in Rule 10b-18 purchases of blocks pursuant to the once-a-week block exception set forth in paragraph (b)(4) of Rule 10b-18 under the Exchange Act (“ Rule 10b-18 ”) by or for Counterparty or any of its “affiliated purchasers” (as defined in Rule 10b-18) during each of the four calendar weeks preceding such day and during the calendar week in which such day occurs (“Rule 10b-18 purchase” and “blocks” each being used as defined in Rule 10b-18), which notice shall be substantially in the form set forth in Schedule B hereto.

As of the Trade Date for each Transaction hereunder, and as of the date of any election with respect to any Transaction hereunder, there has not been any Merger Announcement (as defined below).

The assets of Counterparty do not constitute “plan assets” under the Employee Retirement Income Security Act of 1974, as amended, the Department of Labor Regulations promulgated thereunder or similar law.

Additional Representations, Warranties and Covenants of Dealer . In addition to the representations, warranties and covenants in the Agreement, Dealer represents, warrants and covenants to Counterparty that:

For purposes of Section 3(f) of the Agreement, Dealer makes the following representation:

Regulatory Disruption . In the event that Dealer based on the advice of counsel concludes, in its good faith and reasonable discretion, that it is appropriate with respect to any legal, regulatory or self-regulatory requirements or related policies and procedures (whether or not such requirements, policies or procedures are imposed by law or have been voluntarily adopted by Dealer) that are generally applicable to transactions of the same nature as the Transactions under this Master Confirmation and consistently applied, for it to refrain from or decrease any market activity as it relates to a commercially reasonable hedge position on any Scheduled Trading Day or Days during the Calculation Period or, if applicable, the Settlement Valuation Period, Dealer may by written notice to Counterparty elect to deem that a Market Disruption Event has occurred and will be continuing on such Scheduled Trading Day or Days.

10b5-1 Plan . It is the intent of the parties that each Transaction entered into under this Master Confirmation comply with the requirements of paragraphs (c)(1)(i)(A) and (B) of Rule 10b5-1 and each Transaction entered into under this Master Confirmation shall be interpreted to comply with the requirements of Rule 10b5-1(c), as defined below. Counterparty represents, warrants and covenants to Dealer that:

Counterparty is entering into this Master Confirmation and each Transaction hereunder in good faith and not as part of a plan or scheme to evade the prohibitions of Rule 10b5-1 under the Exchange Act (“ Rule 10b5-1 ”) or any other antifraud or anti-manipulation provisions of the federal or applicable state securities laws and that it has not entered into or altered and will not enter into or alter any corresponding or hedging transaction or position with respect to the Shares.

During the Calculation Period and the Settlement Valuation Period, if any, for any Transaction and in connection with the delivery of any Alternative Delivery Units for any Transaction, Dealer (or its agent or Affiliate) may effect transactions in Shares in connection with such Transaction. The timing of such transactions by Dealer, the price paid or received per Share pursuant to such transactions and the manner in which such transactions are made, including, without limitation, whether such transactions are made on any securities exchange or privately, shall be within the sole judgment of Dealer. Counterparty acknowledges and agrees that all such transactions shall be made in Dealer’s sole judgment and for Dealer’s own account.

Counterparty does not have, and shall not attempt to exercise any control or influence over how, when or whether Dealer (or its agent or Affiliate) makes any “purchases or sales” (within the meaning of Rule 10b5-1(c)(1)(i)(B)(3)) in connection with any Transaction entered into under this Master Confirmation, including, without limitation, over how, when or whether Dealer (or its agent or Affiliate) enters into any hedging transactions. Counterparty represents and warrants that it has consulted with its own advisors as to the legal aspects of its adoption and implementation of this Master Confirmation and each Supplemental Confirmation under Rule 10b5-1.

Counterparty acknowledges and agrees that any amendment, modification, waiver or termination of this Master Confirmation or any Supplemental Confirmation must be effected in accordance with the requirements for the amendment or termination of a “plan” as defined in Rule 10b5-1(c). Without limiting the generality of the foregoing, any such amendment, modification, waiver or termination shall be made in good faith and not as part of a plan or scheme to evade the prohibitions of Rule 10b-5, and no such amendment, modification or waiver shall be made at any time at which Counterparty or any officer, director, manager or similar person of Counterparty is aware of any material non-public information regarding Counterparty or the Shares.

Counterparty shall not, directly or indirectly, communicate any information relating to the Shares or any Transaction (including, without limitation, any notices required by Section 10(a) hereof) to any employee of Dealer, other than as set forth in the Communications Procedures attached as Annex B hereto.

Counterparty Purchases . Counterparty (or any “affiliate” or “affiliated purchaser” as defined in Rule 10b-18) shall not, without the prior written consent of Dealer, directly or indirectly (including, without limitation, by means of a derivative instrument) purchase, offer to purchase, place any bid or limit order that would effect a purchase of, or commence any tender offer relating to, any Shares (or equivalent interest, including, without limitation, a unit of beneficial interest in a trust or limited partnership or a depository share), listed contracts on the Shares or securities that are convertible into, or exchangeable or exercisable for Shares (including, without limitation, any Rule 10b-18 purchases of blocks (as defined in Rule 10b-18)) during any Relevant Period, any Settlement Valuation Period (if applicable) or any Seller Termination Purchase Period (if applicable), under this Master Confirmation. Notwithstanding the foregoing, in its ordinary course of business, the Counterparty may withhold Shares to satisfy tax withholding amounts due from employees related to the receipt of stock which resulted from the exercise or vesting of equity awards.

Dealer Purchases . With respect to purchases of Shares by Dealer in its capacity as Hedging Party in connection with any Transaction during the Calculation Period and Settlement Valuation Period, if any, for such Transaction (other than any purchases made by Dealer in such capacity in connection with dynamic hedge adjustments of Dealer’s exposure to any Transaction as a result of any equity or timing optionality contained in such Transaction), Dealer will use good faith, commercially reasonable efforts to effect such purchases in a manner so that, if such purchases were made by Counterparty, they would meet the requirements of Rule 10b-18(b)(2), (3) and (4), and effect calculations in respect thereof, taking into account any applicable Securities and Exchange Commission no-action letters as appropriate and subject to any delays between the execution and reporting of a trade of the Shares on the Exchange and other circumstances beyond Dealer’s control. Notwithstanding the foregoing, Dealer shall not be responsible for any failure to comply with paragraph (b)(3) of Rule 10b-18 that would not have resulted if (i) a bid that was actually entered or deemed to be entered by or on behalf of Counterparty had instead been an “independent bid” for purposes of paragraph (b)(3) of Rule 10b-18, or (ii) a transaction that was actually executed or deemed to be executed by or on behalf of Counterparty had instead been an “independent transaction” within the meaning of paragraph (b)(3) of Rule 10b-18.

Special Provisions for Merger Transactions . Notwithstanding anything to the contrary herein or in the Equity Definitions:

Counterparty agrees that it:

will not during the period commencing on the Trade Date for any Transaction and ending on the last day of the Relevant Period or, if applicable, the later of the last day of the Settlement Valuation Period and the last day of the Seller Termination Purchase Period, for such Transaction make, or permit to be made, any public announcement (as defined in Rule 165(f) under the Securities Act) of any Merger Transaction or potential Merger Transaction (a “ Merger Announcement ”) unless such Merger Announcement is made prior to the opening or after the close of the regular trading session on the Exchange for the Shares;

shall promptly (but in any event prior to the next opening of the regular trading session on the Exchange) notify Dealer following any such Merger Announcement that such Merger Announcement has been made; and

shall promptly (but in any event prior to the next opening of the regular trading session on the Exchange) provide Dealer with written notice specifying (i) Counterparty’s average daily Rule 10b-18 Purchases (as defined in Rule 10b-18) during the three full calendar months immediately preceding the announcement date of any Merger Transaction or potential Merger Transaction that were not effected through Dealer or its Affiliates and (ii) the number of Shares purchased pursuant to the proviso in Rule 10b-18(b)(4) under the Exchange Act for the three full calendar months preceding the announcement date of any Merger Transaction or potential Merger Transaction. Such written notice shall be deemed to be a certification by Counterparty to Dealer that such information is true and correct. In addition, Counterparty shall promptly notify Dealer of the earlier to occur of the completion of the relevant Merger transaction and the completion of the vote by target shareholders.

Counterparty acknowledges that any such Merger Announcement or delivery of a notice with respect thereto may cause the terms of any Transaction to be adjusted or such Transaction to be terminated; accordingly, Counterparty acknowledges that its delivery of such notice must comply with the standards set forth in Section 8 hereof.

Upon the occurrence of any Merger Announcement (whether made by Counterparty or a third party), Dealer in its sole discretion may (i) in good faith and a commercially reasonable manner make adjustments to the terms of any Transaction to account for the economic effect on the Transaction of such Merger Announcement, including, without limitation, the Scheduled Termination Date or the Forward Price Adjustment Amount, and/or suspend the Calculation Period and/or any Settlement Valuation Period (including adjustments limited to account for changes in stock price, volatility, interest rates, stock loan rate, any commercially reasonable Hedge Positions in connection with the Transaction, liquidity relevant to the Shares or to such

Special Provisions for Acquisition Transaction Announcements . Notwithstanding anything to the contrary herein or in the Equity Definitions:

If an Acquisition Transaction Announcement occurs on or prior to the Final Settlement Date for any Transaction, then the Calculation Agent shall make such adjustments to the exercise, settlement, payment or any other terms of such Transaction as the Calculation Agent determines is commercially reasonable (including, without limitation and for the avoidance of doubt, adjustments that would allow the Number of Shares to be Delivered to be less than zero), at such time or at multiple times as the Calculation Agent determines appropriate, to account for the economic effect on such Transaction of such Acquisition Transaction Announcement (including adjustments to account for changes in volatility, stock loan rate, any commercially reasonable Hedge Positions in connection with the Transaction and liquidity relevant to the Shares or to such Transaction but excluding, for the avoidance of doubt, adjustments to account for changes in expected dividends). If an Acquisition Transaction Announcement occurs after the Trade Date, but prior to the First Acceleration Date of any Transaction, the First Acceleration Date shall be the date of such Acquisition Transaction Announcement.

“ Acquisition Transaction Announcement ” means (i) the announcement of an Acquisition Transaction or an event that, if consummated, would result in an Acquisition Transaction, (ii) an announcement that Counterparty or any of its subsidiaries has entered into an agreement or a letter of intent designed to result in an Acquisition Transaction, (iii) the announcement of the intention to solicit or enter into, or to explore strategic alternatives or other similar undertaking that is reasonably likely to include, an Acquisition Transaction (provided that for such purposes the Calculation Agent may take into account the effect of such announcement on the market price of the Shares or options on the Shares), (iv) any other announcement that in the reasonable judgment of the Calculation Agent is reasonably likely to result in an Acquisition Transaction (provided that for such purposes the Calculation Agent may take into account the effect of such announcement on the market price of the Shares or options on the Shares), or (v) any announcement of any material change or amendment to any previous Acquisition Transaction Announcement (including any announcement of the abandonment of any such previously announced Acquisition Transaction, agreement, letter of intent, understanding or intention). For the avoidance of doubt, announcements as used in the definition of Acquisition Transaction Announcement refer to any public announcement whether made by the Issuer or a third party.

“ Acquisition Transaction ” means (i) any Merger Event (for purposes of this definition the definition of Merger Event shall be read with the references therein to “100%” being replaced by “20%” and references to “50%” being replaced by “75%” and without reference to the clause beginning immediately following the definition of Reverse Merger therein to the end of such definition), Tender Offer or Merger Transaction or any other transaction involving the merger of Counterparty with or into any third party, (ii) the sale or transfer of all or substantially all of the assets of Counterparty, (iii) a recapitalization, reclassification, binding share exchange or other similar transaction with respect to Counterparty, (iv) any acquisition, lease, exchange, transfer, disposition (including by way of spin-off or distribution) of assets (including any capital stock or other ownership interests in subsidiaries) or other similar event by Counterparty or any of its subsidiaries where the aggregate consideration transferable or receivable by or to Counterparty or its subsidiaries exceeds 20% of the market capitalization of Counterparty or (v) any transaction in which Counterparty or its board of directors has a legal obligation to make a recommendation to its shareholders in respect of such transaction (whether pursuant to Rule 14e-2 under the Exchange Act or otherwise).

Acknowledgments .

The parties hereto intend for:

each Transaction to be a “securities contract” as defined in Section 741(7) of the Bankruptcy Code and a “forward contract” as defined in Section 101(25) of the Bankruptcy Code, and the parties hereto to be entitled to the protections afforded by, among other Sections, Sections 362(b)(6), 362(b)(27), 362(o), 546(e), 546(j), 555, 556, 560 and 561 of the Bankruptcy Code;

the Agreement to be a “master netting agreement” as defined in Section 101(38A) of the Bankruptcy Code;

a party’s right to liquidate, terminate or accelerate any Transaction, net out or offset termination values or payment amounts, and to exercise any other remedies upon the occurrence of any Event of Default or Termination Event under the Agreement with respect to the other party or any Extraordinary Event that results in the termination or cancellation of any Transaction to constitute a “contractual right” (as defined in the Bankruptcy Code); and

all payments for, under or in connection with each Transaction, all payments for the Shares (including, for the avoidance of doubt, payment of the Prepayment Amount) and the transfer of such Shares to constitute “settlement payments” and “transfers” (as defined in the Bankruptcy Code).

Counterparty acknowledges that:

during the term of any Transaction, Dealer and its Affiliates may buy or sell Shares or other securities or buy or sell options or futures contracts or enter into swaps or other derivative securities in order to establish, adjust or unwind its hedge position with respect to such Transaction;

Dealer and its Affiliates may also be active in the market for the Shares and Share-linked transactions other than in connection with hedging activities in relation to any Transaction;

Dealer shall make its own determination as to whether, when or in what manner any hedging or market activities in Counterparty’s securities shall be conducted and shall do so in a manner that it deems appropriate to hedge its price and market risk with respect to the Forward Price and the VWAP Price;

any market activities of Dealer and its Affiliates with respect to the Shares may affect the market price and volatility of the Shares, as well as the Forward Price, the VWAP Price and the Settlement Price, each in a manner that may be adverse to Counterparty; and

each Transaction is a derivatives transaction in which it has granted Dealer an option; Dealer may purchase shares for its own account at an average price that may be greater than, or less than, the price paid by Counterparty under the terms of the related Transaction.

No Collateral, Netting or Setoff . Notwithstanding any provision of the Agreement or any other agreement between the parties to the contrary, the obligations of Counterparty hereunder are not secured by any collateral. Obligations under any Transaction shall not be netted, recouped or set off (including pursuant to Section 6 of the Agreement) against any other obligations of the parties, whether arising under the Agreement, this Master Confirmation or any Supplemental Confirmation, or under any other agreement between the parties hereto, by operation of law or otherwise, and no other obligations of the parties shall be netted, recouped or set off (including pursuant to Section 6 of the Agreement) against obligations under any Transaction, whether arising under the Agreement, this Master Confirmation or any Supplemental Confirmation, or under any other agreement between the parties hereto, by operation of law or otherwise, and each party hereby waives any such right of setoff, netting or recoupment.

Delivery of Shares . Notwithstanding anything to the contrary herein, Dealer may, by prior notice to Counterparty, satisfy its obligation to deliver any Shares or other securities on any date due (an “ Original Delivery Date ”) by making separate deliveries of Shares or such securities, as the case may be, at more than one time on or prior to such Original Delivery Date, so long as the aggregate number of Shares and other securities so delivered on or prior to such Original Delivery Date is equal to the number required to be delivered on such Original Delivery Date.

Alternative Termination Settlement . In the event that (a) an Early Termination Date (whether as a result of an Event of Default or a Termination Event) occurs or is designated with respect to any Transaction or (b) any Transaction is cancelled or terminated upon the occurrence of an Extraordinary Event (except as a result of (i) a Nationalization, Insolvency or Merger Event in which the consideration to be paid to holders of Shares consists solely of cash, (ii) a Merger Event or Tender Offer that is within Counterparty’s control, or (iii) an Event of Default in which Counterparty is the Defaulting Party or a Termination Event in which Counterparty is the Affected Party other than an Event of Default of the type described in Section 5(a)(iii), (v), (vi), (vii) or (viii) of the Agreement or a Termination Event of the type described in Section 5(b) of the Agreement, in each case that resulted from an event or events outside Counterparty’s control), if either party would owe any amount to the other party pursuant to Section 6(d)(ii) of the Agreement or any Cancellation Amount pursuant to Article 12 of the Equity Definitions (any such amount, a “ Payment Amount ”), then, in lieu of any payment of such Payment Amount, unless Counterparty makes an election to the contrary no later than the Early Termination Date or the date on which such Transaction is terminated or cancelled, Counterparty or Dealer, as the case may be, shall deliver to the other party a number of Shares (or, in the case of a Nationalization, Insolvency or Merger Event, a number of units, each comprising the number or amount of the securities or property that a hypothetical holder of one Share would receive in such Nationalization, Insolvency or Merger Event, as the case may be (each such unit, an “ Alternative Delivery Unit ”)) with a value equal to the Payment Amount, as determined by the Calculation Agent over a commercially reasonable period of time (and the parties agree that, in making such determination of value, the Calculation Agent may take into account a number of factors, including, without limitation, the market price of the Shares or Alternative Delivery Units on the Early Termination Date or the date of early cancellation or termination, as the case may be, and, if such delivery is made by Dealer, the prices at which Dealer purchases Shares or Alternative Delivery Units in a commercially reasonable manner to fulfill its delivery obligations under this Section 15); provided that in determining the composition of any Alternative Delivery Unit, if the relevant Nationalization, Insolvency or Merger Event involves a choice of consideration to be received by holders, such holder shall be deemed to have elected to receive the maximum possible amount of cash; and provided further that Counterparty may make such elections only if Counterparty represents and warrants to Dealer, in writing on the date it notifies Dealer of such election, that, as of such date, Counterparty is not aware of any material non-public information regarding Counterparty or the Shares and is making such election in good faith and not as part of a plan or scheme to evade compliance with the federal securities laws. If delivery of Shares or Alternative Delivery Units, as the case may be, pursuant to this Section 15 is to be made by Counterparty, paragraphs 2 through 7 of Annex A hereto shall apply as if (A) such delivery were a settlement of such Transaction to which Net Share Settlement applied, (B) the Cash Settlement Payment Date were the Early Termination Date or the date of early cancellation or termination, as the case may be, and (C) the Forward Cash Settlement Amount were equal to (x) zero minus (y) the Payment Amount owed by Counterparty. For the avoidance of doubt, if Counterparty validly elects for the provisions of this Section 15 relating to the delivery of Shares or Alternative Delivery Units, as the case may be, not to apply to any Payment Amount, the provisions of Article 12 of the Equity Definitions, or the provisions of Section 6(d)(ii) of the Agreement, as the case may be, shall apply. If delivery of Shares or Alternative Delivery Units, as the case may be, is to be made by Dealer pursuant to this Section 15, the period during which Dealer purchases Shares or Alternative Delivery Units to fulfill its delivery obligations under this Section 15 shall be referred to as the “ Seller Termination Purchase Period ”.

Calculations and Payment Date upon Early Termination . The parties acknowledge and agree that in calculating (a) the Close-Out Amount pursuant to Section 6 of the Agreement and (b) the amount due upon cancellation or termination of any Transaction (whether in whole or in part) pursuant to Article 12 of the Equity Definitions as a result of an Extraordinary Event, Dealer may (but need not) determine such amount based on (i) expected losses assuming a commercially reasonable (including, without limitation, with regard to reasonable legal and regulatory guidelines) risk bid were used to determine loss or (ii) the price at which one or more market participants would offer to sell to the Seller a block of Shares equal in number to the Seller’s hedge position in relation to the Transaction. Notwithstanding anything to the contrary in Section 6(d)(ii) of the Agreement or Article 12 of the Equity Definitions, all amounts calculated as being due in respect of an Early Termination Date under Section 6(e) of the Agreement or upon cancellation or termination of the relevant Transaction under Article 12 of the Equity Definitions will be payable on the day that notice of the amount payable is effective; provided that if Counterparty elects to receive or deliver Shares or Alternative Delivery Units in accordance with Section 15 hereof, such Shares or Alternative Delivery Units shall be delivered on a date selected by Dealer as promptly as practicable.

Limit on Beneficial Ownership . Notwithstanding any other provisions hereof, Dealer may not be entitled to take delivery of any Shares deliverable hereunder to the extent (but only to the extent) that, after such receipt of any Shares hereunder, the Equity Percentage would exceed 4.9%. Any purported delivery hereunder shall be void and have no effect to the extent (but only to the extent) that, after such delivery the Equity Percentage would exceed 4.9%. If any delivery owed to Dealer hereunder is not made, in whole or in part, as a result of this provision, Counterparty’s obligation to make such delivery shall not be extinguished and Counterparty shall make such delivery as promptly as practicable after, but in no event later than one Business Day after, Dealer gives notice to Counterparty that, after such delivery, the Equity Percentage would not exceed 4.9%. The “Equity Percentage” as of any day is the fraction, expressed as a percentage, (A) the numerator of which is the number of Shares that Dealer and any of its affiliates or any other person subject to aggregation with Dealer for purposes of the “beneficial ownership” test under Section 13 of the Exchange Act, or any “group” (within the meaning of Section 13) of which Dealer is or may be deemed to be a part beneficially owns (within the meaning of Section 13 of the Exchange Act), without duplication, on such day (or, to the extent that for any reason the equivalent calculation under Section 16 of the Exchange Act and the rules and regulations thereunder results in a higher number, such higher number) and (B) the denominator of which is the number of Shares outstanding on such day.

Maximum Share Delivery . Notwithstanding anything to the contrary in this Master Confirmation, in no event shall Dealer be required to deliver any Shares, or any Shares or other securities comprising Alternative Delivery Units, in respect of any Transaction in excess of the Maximum Number of Shares set forth in the Supplemental Confirmation for such Transaction.

Additional Termination Events .

The occurrence of an event described in paragraph III of Annex B hereto will constitute an Additional Termination Event, with Counterparty as the sole Affected Party and the Transactions specified in such paragraph III as the Affected Transactions.

Notwithstanding anything to the contrary in Section 6 of the Agreement, if a Termination Price is specified in the Supplemental Confirmation for any Transaction, then an Additional Termination Event will occur without any notice or action by Dealer or Counterparty if on two consecutive Exchange Business Days the price of the Shares on the Exchange at any time falls below such Termination Price, with Counterparty as the sole Affected Party and such Transaction as the sole Affected Transaction.

Non-confidentiality . Dealer and Counterparty hereby acknowledge and agree that, subject to Section 8(e) hereof, each is authorized to disclose every aspect of this Master Confirmation, any Supplemental Confirmation and the transactions contemplated hereby and thereby to any and all persons, without limitation of any kind, and there are no express or implied agreements, arrangements or understandings to the contrary.

[ Reserved.]

Assignment and Transfer . Notwithstanding anything to the contrary in the Agreement, Dealer may assign any of its rights or duties hereunder to any one or more of its Affiliates without the prior written consent of Counterparty provided that the senior unsecured debt rating (“ Credit Rating ”) of such affiliate (or guarantor of its obligations under the transferred Transaction) is equal to or greater than the Credit Rating of Dealer, as specified by at least one of Standard & Poor’s and Moody’s, at the date of this Master Confirmation or the time of such assignment or transfer (whichever is higher). In the event of any transfer or assignment of any rights, title and interest, powers, privileges and remedies of Dealer under any Transaction, the transferee or assignee shall assume and enter into all of the transferor’s covenants and representations under Sections 3(e), 3(f), 4(a)(i) and 4(a)(iii) of the Agreement or enter into new covenants and representations that are agreed by the other party under the Agreement, and the identity of the transferee or assignee shall be entered on the books and records maintained by each party or its respective agents. Notwithstanding any other provision in this Master Confirmation to the contrary requiring or allowing Dealer to purchase, sell, receive or deliver any Shares or other securities to or from Counterparty, Dealer may designate any of its Affiliates to purchase, sell, receive or deliver such Shares or other securities and otherwise to perform Dealer’s obligations in respect of any Transaction and any such designee may assume such obligations. Dealer may assign the right to receive Settlement Shares to any third party who may legally receive Settlement Shares. Dealer shall be discharged of its obligations to Counterparty only to the extent of any such performance. For the avoidance of doubt, Dealer hereby acknowledges that notwithstanding any such designation hereunder, to the extent any of Dealer’s obligations in respect of any Transaction are not completed by its designee, Dealer shall be obligated to continue to perform or to cause any other of its designees to perform in respect of such obligations.

Amendments to the Equity Definitions .

Section 11.2(a) of the Equity Definitions is hereby amended by deleting the words “a diluting or concentrative” and replacing them with the word “an”; and adding the phrase “or such Transaction” at the end of the sentence.

Section 11.2(c) of the Equity Definitions is hereby amended by (i) replacing the words “a diluting or concentrative” with “an” in the fifth line thereof, (ii) adding the phrase “or such Transaction” after the words “the relevant Shares” in the same sentence, (iii) deleting the words “diluting or concentrative” in the sixth to last line thereof, and (iv) deleting the phrase “(provided that no adjustments will be made to account solely for changes in volatility, expected dividends, stock loan rate or liquidity relative to the relevant Shares)” and replacing it with the phrase “(and, for the avoidance of doubt, adjustments may be made to account solely for changes in volatility, expected dividends, stock loan rate or liquidity relative to the relevant Shares).”

Section 11.2(e)(vii) of the Equity Definitions is hereby amended by deleting the words “a diluting or concentrative” and replacing them with the words “a material”; and adding the phrase “or the relevant Transaction” at the end of the sentence.

Section 12.6(a)(ii) of the Equity Definitions is hereby amended by (i) deleting from the fourth line thereof the word “or” after the word “official” and inserting a comma therefor, and (ii) deleting the semi-colon at the end of subsection (B) thereof and inserting the following words therefor “or (C) at Dealer’s option, the occurrence of any of the events specified in Section 5(a)(vii) (1) through (9) of the ISDA Master Agreement with respect to that Issuer.”

Section 12.9(b)(iv) of the Equity Definitions is hereby amended by:

deleting (1) subsection (A) in its entirety, (2) the phrase “or (B)” following subsection (A) and (3) the phrase “in each case” in subsection (B); and

replacing the phrase “neither the Non-Hedging Party nor the Lending Party lends Shares” with the phrase “such Lending Party does not lend Shares” in the penultimate sentence.

Section 12.9(b)(v) of the Equity Definitions is hereby amended by:

adding the word “or” immediately before subsection “(B)” and deleting the comma at the end of subsection (A); and

(1) deleting subsection (C) in its entirety, (2) deleting the word “or” immediately preceding subsection (C), (3) deleting the penultimate sentence in its entirety and replacing it with the sentence “The Determining Party will determine the Cancellation Amount payable by one party to the other” and (4) deleting clause (X) in the final sentence.

Section 12.9(b)(vi) of the Equity Definitions is hereby amended by:

adding the word “or” immediately before subsection “(B)” and deleting the comma at the end of subsection (A); and

(1) deleting subsection (C) in its entirety, (2) deleting the word “or” immediately preceding subsection (C) and (3) deleting the final sentence in its entirety and replacing it with the sentence “The Hedging Party will determine the Cancellation Amount payable by one party to the other”.

Extraordinary Dividend . The declaration by Counterparty of any Extraordinary Dividend that has an ex-dividend date during the period commencing on the Trade Date for any Transaction and ending of the last day of the Relevant Period or, if applicable, the later of the last day of the Settlement Valuation Period and the last day of the Seller Termination Purchase Period, for such Transaction, shall constitute an Additional Termination Event in respect of such Transaction, with Counterparty as the sole Affected Party and such Transaction as the sole Affected Transaction.

Status of Claims in Bankruptcy . Dealer acknowledges and agrees that neither this Master Confirmation nor any Supplemental Confirmation is intended to convey to Dealer rights against Counterparty with respect to any Transaction that are senior to the claims of common stockholders of Counterparty in any United States bankruptcy proceedings of Counterparty; provided that nothing herein shall limit or shall be deemed to limit Dealer’s right to pursue remedies in the event of a breach by Counterparty of its obligations and agreements with respect to any Transaction; provided further that nothing herein shall limit or shall be deemed to limit Dealer’s rights in respect of any transactions other than any Transaction.

Wall Street Transparency and Accountability Act . In connection with Section 739 of the Wall Street Transparency and Accountability Act of 2010 (“ WSTAA ”), the parties hereby agree that neither the enactment of WSTAA or any regulation under the WSTAA, nor any requirement under WSTAA or an amendment made by WSTAA, nor any similar legal certainty provision in any legislation enacted, or rule or regulation promulgated, on or after the date of this Master Confirmation, shall limit or otherwise impair either party’s otherwise applicable rights to terminate, renegotiate, modify, amend or supplement any Supplemental Confirmation, this Master Confirmation or the Agreement, as applicable, arising from a termination event, force majeure, illegality, increased costs, regulatory change or similar event under any Supplemental Confirmation, this Master Confirmation, the Equity Definitions incorporated herein, or the Agreement (including, without limitation, rights arising from Change in Law, Loss of Stock Borrow, Increased Cost of Stock Borrow, Hedging Disruption, Increased Cost of Hedging, or Illegality).

Foreign Account Tax Compliance Act. “Tax” as used in Part 2(a) of this Schedule (Payer Tax Representation) and “Indemnifiable Tax” as defined in Section 14 of this Agreement shall not include any U.S. federal withholding tax imposed or collected pursuant to Sections 1471 through 1474 of the U.S. Internal Revenue Code of 1986, as amended (the “ Code ”), any current or future regulations or official interpretations thereof, any agreement entered into pursuant to Section 1471(b) of the Code, or any fiscal or regulatory legislation, or rules adopted pursuant to any intergovernmental agreement entered into in connection with the implementation of such Sections of the Code (a “ FATCA Withholding Tax ”). For the avoidance of doubt, a FATCA Withholding Tax is a Tax the deduction or withholding of which is required by applicable law for the purposes of Section 2(d) of this Agreement.

2015 Section  871(m) Protocol . The parties agree that the definitions and provisions contained in the Attachment to the ISDA 2015 Section 871(m) Protocol published on November 2, 2015 by the International Swaps and Derivatives Association, Inc. are hereby incorporated by reference in, and shall form part of, this Agreement. References in the Section 871(m) protocol to “Covered Master Agreement” will be deemed references to the Master Agreement, and references to the “Implementation Date” shall be the date of this Agreement.

[ Reserved.]

Waiver of Jury Trial . EACH PARTY WAIVES, TO THE FULLEST EXTENT PERMITTED BY APPLICABLE LAW, ANY RIGHT IT MAY HAVE TO A TRIAL BY JURY IN RESPECT OF ANY SUIT, ACTION OR PROCEEDING RELATING TO THE AGREEMENT, THIS MASTER CONFIRMATION, EACH SUPPLEMENTAL CONFIRMATION, THE TRANSACTIONS HEREUNDER AND ALL MATTERS ARISING IN CONNECTION WITH THE AGREEMENT, THIS MASTER CONFIRMATION AND ANY SUPPLEMENTAL CONFIRMATION AND THE TRANSACTIONS HEREUNDER. EACH PARTY (I) CERTIFIES THAT NO REPRESENTATIVE, AGENT OR ATTORNEY OF THE OTHER PARTY HAS REPRESENTED, EXPRESSLY OR OTHERWISE, THAT SUCH OTHER PARTY WOULD NOT, IN THE EVENT OF SUCH A SUIT, ACTION OR PROCEEDING, SEEK TO ENFORCE THE FOREGOING WAIVER AND (II) ACKNOWLEDGES THAT IT AND THE OTHER PARTY HAVE BEEN INDUCED TO ENTER INTO THE TRANSACTIONS, AS APPLICABLE, BY, AMONG OTHER THINGS, THE MUTUAL WAIVERS AND CERTIFICATIONS PROVIDED HEREIN.

Counterparts . This Master Confirmation may be executed in any number of counterparts, all of which shall constitute one and the same instrument, and any party hereto may execute this Master Confirmation by signing and delivering one or more counterparts.

Accepted and confirmed

as of the date first set

forth above:

/s/ Ann K. Tripp

Name: Ann K. Tripp

            Executive Vice President, Chief Investment             Officer and Treasurer

The Hanover Insurance Group, Inc.

Supplemental Confirmation—Uncollared Accelerated Share Repurchase

To be approximately 50% of the total number of Shares outstanding on the Trade Date.

Accepted and confirmed

as of the Trade Date:

Name: Ann K. Tripp

            Executive Vice President, Chief Investment             Officer and Treasurer

Uncollared Accelerated Share Repurchase

Name: Ann K. Tripp

            Executive Vice President, Chief

            Investment Officer and Treasurer