Document:

Description of Incentive Compensation Deferral and Conversion Program

 EXHIBIT 10.35 
 Description of The Hanover Insurance Group, Inc. IC Deferral and Conversion Program 
 The Company has
established a deferral and conversion program (the “IC Deferral Program”) that permits certain officers of the Company to defer and convert a portion of their Annual Short-Term Incentive Compensation Program compensation (not to exceed the
greater of $50,000 or 20% of base salary) into a number of restricted stock units (issued pursuant to The Hanover Insurance Group, Inc. 2006 Long-Term Incentive Plan (the “2006 Plan”)) determined based on the fair market value of the
underlying shares at the time such compensation would otherwise have been paid. An additional grant of restricted stock units is made on the conversion date having a fair market value equal to 15% of the deferred and converted incentive compensation
award amounts. Such restricted stock units convert into shares of THG Common Stock upon vesting, which is three years after the date of grant. In the event the officer is not continuously employed by the Company through the vesting date, then
(except in limited circumstances) all such restricted stock units are forfeited, although the Company will pay the officer for the amount of incentive compensation initially deferred and converted, plus interest, compounded annually, based on the
so-called General Agreement on Tariffs and Trade (GATT) rate. These restricted stock units do not have voting rights, but do carry deferred dividend equivalency rights to the extent dividends are declared on the underlying shares of Common Stock.
Such restricted stock units are also subject to the terms and conditions contained in the 2006 Plan Incentive Compensation Deferral and Conversion Agreement.The Hanover Insurance Group 2006 Long-Term Incentive Plan

 EXHIBIT 10.36 
 THE HANOVER INSURANCE GROUP, INC. 2006 LONG-TERM INCENTIVE PLAN 
 1. DEFINED TERMS 
 Exhibit A, which is incorporated by reference, defines the terms used in the Plan and sets forth certain operational rules related to those terms.

 2. PURPOSE 
 The Plan has been
established to advance the interests of the Company by providing for the grant to Participants of Stock-based Awards. 
 3. ADMINISTRATION

 The Administrator has discretionary authority, subject only to the express provisions of the Plan, to interpret the Plan; determine
eligibility for and grant Awards; determine, modify or waive the terms and conditions of any Award; prescribe forms, rules and procedures; and otherwise do all things necessary to carry out the purposes of the Plan. In the case of any Award intended
to be eligible for the performance-based compensation exception under Section 162(m), the Administrator will exercise its discretion consistent with qualifying the Award for that exception. Determinations of the Administrator made under the
Plan will be conclusive and will bind all parties. 
 4. LIMITS ON AWARDS UNDER THE PLAN 
 (a) Number of Shares. Subject to adjustment as provided in Section 7(b), the maximum number of shares of Stock (the
“Share Limit”) that may be delivered in satisfaction of Awards under the Plan is 3,000,000 plus the number of shares of Stock that (A) are subject to awards granted and outstanding under the Prior Plan as of the Adoption
Date, to the extent such awards are forfeited or are canceled, or expire or terminate, after the Adoption Date without the issuance of Stock or are satisfied after the Adoption Date without the issuance of Stock, or (B) are outstanding as of
the Adoption Date in the form of restricted stock awards under the Prior Plan and that are thereafter reacquired or repurchased by the Company prior to vesting. The number of shares of Stock delivered in satisfaction of Full Value Awards shall not
exceed 50% of the Share Limit, and the number of shares of Stock delivered in satisfaction of ISOs shall not exceed 3,000,000. The number of shares of Stock delivered in satisfaction of Awards shall, for purposes of the preceding two sentences, be
determined net of shares of Stock withheld by the Company in satisfaction of tax withholding requirements with respect to the Award and net of forfeited shares of Restricted Stock. For the avoidance of doubt, a share of Stock made subject to an
Award that is exercised or satisfied, or that terminates or expires, without the delivery of such share shall not be treated as having been delivered under the Plan. To the extent consistent with the requirements of Section 422 of the Code and
regulations thereunder, and with other applicable legal requirements (including applicable stock exchange requirements), Stock issued under awards of an acquired company that are converted, replaced, or adjusted in connection with the acquisition
shall not reduce the number of shares available for Awards under the Plan. 
 (b) Type of Shares. Stock delivered by
the Company under the Plan may be authorized but unissued Stock or previously issued Stock acquired by the Company. No fractional shares of Stock will be delivered under the Plan. 
 (c) Section 162(m) Limits. Subject to the Share Limit, the maximum number of shares of Stock for which Stock Options may be
granted to any person in any calendar year and the maximum number of shares of Stock subject to SARs granted to any person in any calendar year will each be 500,000. The maximum number of shares of Stock subject to other Awards granted to any person
in any calendar year will be 150,000 shares of Stock. The foregoing provisions will be construed in a manner consistent with Section 162(m) and will be subject to adjustment as provided in Section 7(b). 
 5. ELIGIBILITY AND PARTICIPATION 
 The
Administrator will select Participants from among those key employees and directors of, consultants and advisors to, and other persons providing services to the Company or its Affiliates who, in the opinion of the Administrator, are in a position to
make a contribution to the success of the Company and its Affiliates; provided, that eligibility shall be further limited to those persons as to whom the use of a Form S-8 Registration Statement is permissible. Eligibility for ISOs is limited
to employees of the Company or of a “parent corporation” or “subsidiary corporation” of the Company as those terms are defined in Section 424 of the Code. 

 6. RULES APPLICABLE TO AWARDS 
 (a) All Awards  
 (1) Award Provisions. The Administrator will
determine the terms of all Awards, subject to the limitations provided herein. By accepting any Award granted hereunder, the Participant agrees to the terms of the Award and the Plan. Notwithstanding any provision of this Plan to the contrary,
awards of an acquired company that are converted, replaced or adjusted in connection with the acquisition may contain terms and conditions that are inconsistent with the terms and conditions specified herein, as determined by the Administrator.

 (2) Term of Plan (ISOs). No ISOs may be granted under the Plan more than ten years after the earlier of the date
the Plan was adopted by the Company or the date the Plan was approved by the stockholders of the Company, but previously granted ISOs may continue beyond that ten-year term. 
 (3) Transferability. Neither ISOs nor, except as the Administrator otherwise expressly provides in accordance with the second
sentence of this Section 6(a)(3), other Awards may be transferred other than by will or by the laws of descent and distribution, and during a Participant’s lifetime ISOs (and, except as the Administrator otherwise expressly provides in
accordance with the second sentence of this Section 6(a)(3), other non-transferable Awards requiring exercise) may be exercised only by the Participant. To the extent provided in the immediately preceding sentence, the Administrator may permit
Awards other than ISOs to be transferred by gift, subject to such limitations as the Administrator may impose. 
 (4) Vesting,
Etc. The Administrator may determine the time or times at which an Award will vest or become exercisable and the terms on which an Award requiring exercise will remain exercisable. Without limiting the foregoing, the
Administrator may at any time accelerate the vesting or exercisability of an Award, regardless of any adverse or potentially adverse tax consequences resulting from such acceleration. Unless the Administrator expressly provides otherwise, however,
the following rules will apply: immediately upon the cessation of the Participant’s Employment, each Award requiring exercise that is then held by the Participant or by the Participant’s permitted transferees, if any, will cease to be
exercisable and will terminate, and all other Awards that are then held by the Participant or by the Participant’s permitted transferees, if any, to the extent not already vested will be forfeited, except that: 
 (A) subject to (B) and (C) below, all Stock Options and SARs held by the Participant or the Participant’s permitted
transferees, if any, immediately prior to the cessation of the Participant’s Employment, to the extent then exercisable, will remain exercisable for the lesser of (i) a period of three months or (ii) the period ending on the latest
date on which such Stock Option or SAR could have been exercised without regard to this Section 6(a)(4), and will thereupon terminate; 
 (B) all Stock Options and SARs held by a Participant or the Participant’s permitted transferees, if any, immediately prior to the Participant’s death, to the extent then exercisable, will remain exercisable
for the lesser of (i) the one year period ending with the first anniversary of the Participant’s death or (ii) the period ending on the latest date on which such Stock Option or SAR could have been exercised without regard to this
Section 6(a)(4), and will thereupon terminate; and 
 (C) all Stock Options and SARs held by a Participant or the
Participant’s permitted transferees, if any, immediately prior to the cessation of the Participant’s Employment will immediately terminate upon such cessation if the Administrator in its sole discretion determines that such cessation of
Employment has resulted from a termination of the Participant’s Employment for Cause. 
 (5) Taxes. The
Administrator will make such provision for the withholding of taxes as it deems necessary or appropriate. The Administrator may, but need not, hold back shares of Stock from an Award or permit a Participant to tender previously owned shares of Stock
in satisfaction of tax withholding requirements (but not in excess of the minimum withholding required by law). 
 (6) Dividend
Equivalents, Etc. The Administrator may provide for the payment of amounts in lieu of cash dividends or other cash distributions with respect to shares of Stock (not exceeding 250,000 shares in the aggregate) subject to Full
Value Awards or by reference to which Full Value Awards are denominated. Any such payment provisions shall comply with the requirements of Section 409A. For the avoidance of doubt, dividends or other distributions with respect to outstanding
shares of Restricted Stock shall not be treated as in-lieu amounts described in the first sentence of this Section 6(a)(6). 
 (7) Rights Limited. Nothing in the Plan will be construed as giving any person the right to continued employment or service with the Company or its Affiliates, or any rights as a stockholder except as to
shares of Stock actually issued under the Plan. The loss of existing or potential profit in Awards will not constitute an element of damages in the event of termination of Employment for any reason, even if the termination is in violation of an
obligation of the Company or Affiliate to the Participant. 
 (8) Section 162(m). This
Section 6(a)(8) applies to any Performance Award intended to qualify as performance-based for the purposes of Section 162(m) other than a Stock Option or SAR. In the case of any Performance Award to which this Section 6(a)(8) applies,
the Plan and such Award will be construed to the maximum extent permitted by law in a manner consistent with qualifying the Award for such exception. With respect to such Performance Awards, the Administrator will 

 
preestablish, in writing, one or more specific Performance Criteria no later than 90 days after the commencement of the period of service to which the
performance relates (or at such earlier time as is required to qualify the Award as performance-based under Section 162(m)). Prior to grant, vesting or payment of the Performance Award, as the case may be, the Administrator will certify whether
the applicable Performance Criteria have been attained and such determination will be final and conclusive. No Performance Award to which this Section 6(a)(8) applies may be granted after the first meeting of the stockholders of the Company
held in 2011 until the listed performance measures set forth in the definition of “Performance Criteria” (as originally approved or as subsequently amended) have been resubmitted to and reapproved by the stockholders of the Company in
accordance with the requirements of Section 162(m), unless such grant is made contingent upon such approval. 
 (9) Section 409A. Awards under the Plan are intended either to be exempt from the rules of Section 409A or to satisfy those rules, and shall be construed accordingly. 
 (10) Coordination with Other Plans. Awards under the Plan may be granted in tandem with, or in satisfaction of or
substitution for, other Awards under the Plan or awards made under other compensatory plans or programs of the Company or its Affiliates. For example, but without limiting the generality of the foregoing, awards under other compensatory plans or
programs of the Company or its Affiliates may be settled in Stock (including, without limitation, Unrestricted Stock) if the Administrator so determines, in which case the delivery of such Stock shall be treated as awarded under the Plan (and shall
reduce the number of shares thereafter available under the Plan in accordance with the rules set forth in Section 4). In any case where an award is made under another plan or program of the Company or its Affiliates and such award is intended
to qualify for the performance-based compensation exception under Section 162(m), and such award is settled by the delivery of Stock or another Award under the Plan, the applicable Section 162(m) limitations under both the other plan or
program and under the Plan shall be applied to the Plan as necessary (as determined by the Administrator) to preserve the availability of the Section 162(m) performance-based compensation exception with respect thereto. 
 (b) Awards Requiring Exercise  
 (1) Time And Manner Of Exercise. Unless the Administrator expressly provides otherwise, an Award requiring exercise by the holder will not be deemed to have been exercised until the Administrator receives
a notice of exercise (in form acceptable to the Administrator) signed by the appropriate person and accompanied by any payment required under the Award. If the Award is exercised by any person other than the Participant, the Administrator may
require satisfactory evidence that the person exercising the Award has the right to do so. 
 (2) Exercise
Price. The exercise price (or the base value from which appreciation is to be measured) of each Award requiring exercise shall be 100% of the fair market value of the Stock subject to the Award, determined as of the date of grant, or
such higher amount as the Administrator may determine in connection with the grant. No such Award, once granted, may be repriced other than in accordance with the applicable stockholder approval requirements of the New York Stock Exchange.

 (3) Payment Of Exercise Price. Where the exercise of an Award is to be accompanied by payment, the
Administrator may determine the required or permitted forms of payment, subject to the following: all payments will be by cash or check acceptable to the Administrator, or, if so permitted by the Administrator and if legally permissible,
(i) through the delivery of shares of Stock that have been outstanding for at least six months (unless the Administrator approves a shorter period) and that have a fair market value equal to the exercise price, (ii) through a
broker-assisted exercise program acceptable to the Administrator, (iii) by other means acceptable to the Administrator, or (iv) by any combination of the foregoing permissible forms of payment. The delivery of shares in payment of the
exercise price under clause (a)(i) above may be accomplished either by actual delivery or by constructive delivery through attestation of ownership, subject to such rules as the Administrator may prescribe. 
 (4) Maximum Term. Awards requiring exercise will have a maximum term not to exceed ten (10) years from the date of
grant. 
 (c) Awards Not Requiring Exercise  
 Restricted Stock and Unrestricted Stock, whether delivered outright or under Awards of Stock Units or other Awards that do not require exercise, may be made in exchange for such lawful consideration, including
services, as the Administrator determines. 
 7. EFFECT OF CERTAIN TRANSACTIONS 
 (a) Mergers, etc. Except as otherwise provided in an Award, the following
provisions shall apply in the event of a Covered Transaction (or, to the extent provided in Section 7(a)(6) below, in the event of a Change in Control whether or not it is a Covered Transaction): 
 (1) Assumption or Substitution. If the Covered Transaction is one in which there is an acquiring or surviving entity, the
Administrator may provide for the assumption of some or all outstanding Awards or for the grant of new awards in substitution therefor by the acquiror or survivor or an affiliate of the acquiror or survivor. 

 (2) Cash-Out of Awards. If the Covered Transaction is one in which holders
of Stock will receive upon consummation a payment (whether cash, non-cash or a combination of the foregoing), the Administrator may provide for payment (a “cash-out”), with respect to some or all Awards, equal in the case of each affected
Award to the excess, if any, of (A) the fair market value of one share of Stock (as determined by the Administrator in its reasonable discretion consistent with Section 409A) times the number of shares of Stock subject to the Award, over
(B) the aggregate exercise or purchase price, if any, under the Award (in the case of an SAR, the aggregate base price above which appreciation is measured), in each case on such payment terms (which need not be the same as the terms of payment
to holders of Stock) and other terms, and subject to such conditions, as the Administrator determines. 
 (3) Acceleration
of Certain Awards. If the Covered Transaction (whether or not there is an acquiring or surviving entity) is one in which there is no assumption, substitution or cash-out, each Award requiring exercise will become fully exercisable and
the delivery of shares of Stock deliverable under each outstanding Award of Stock Units (including Restricted Stock Units and Performance Awards to the extent consisting of Stock Units) will be accelerated and such shares will be delivered, prior to
the Covered Transaction, in each case on a basis that gives the holder of the Award a reasonable opportunity, as determined by the Administrator, following exercise of the Award or the delivery of the shares, as the case may be, to participate as a
stockholder in the Covered Transaction. 
 (4) Termination of Awards Upon Consummation of Covered
Transaction. Each Award (unless assumed pursuant to Section 7(a)(1) above), other than outstanding shares of Restricted Stock (which shall be treated in the same manner as other shares of Stock, subject to Section 7(a)(5)
below), will terminate upon consummation of the Covered Transaction. 
 (5) Additional Limitations. Any share
of Stock or cash-out payment delivered pursuant to Section 7(a)(2) or Section 7(a)(3) above with respect to an Award may, in the discretion of the Administrator, contain such restrictions, if any, as the Administrator deems appropriate to
reflect any performance or other vesting conditions to which the Award was subject and that did not lapse (or were not satisfied) in connection with the Covered Transaction. In the case of Restricted Stock that does not vest in connection with the
Covered Transaction, the Administrator may require that any amounts delivered, exchanged or otherwise paid in respect of such Stock in connection with the Covered Transaction be placed in escrow or otherwise made subject to such restrictions as the
Administrator deems appropriate to carry out the intent of the Plan. The provisions of this Section 7(a)(5) shall be applied after taking into account any accelerated vesting under Section 7(a)(6), where Section 7(a)(6) is applicable.

 (6) Change in Control. In the event of a Change in Control, each outstanding Award shall vest (and, if
relevant, become exercisable), in each case regardless of whether (if the transaction is a Covered Transaction) there is an assumption or substitution of the Award under Section 7(a)(1) above. The provisions of this Section 7(a)(6) shall
be applied before the application of the foregoing provisions of this Section 7(a). 
 (7) Section 409A. Notwithstanding the foregoing provisions of this Section 7(a), Awards subject to and intended to satisfy the requirements of Section 409A shall be construed and
administered consistent with such intent. 
 (b) Change in and Distributions With Respect to Stock  
 (1) Basic Adjustment Provisions. In the event of a stock dividend, stock split or combination of shares (including a
reverse stock split), recapitalization or other change in the Company’s capital structure, the Administrator will make appropriate adjustments to the maximum number of shares specified in Section 4(a) that may be delivered under the Plan
and to the maximum share limits described in Section 4(c), and will also make appropriate adjustments to the number and kind of shares of stock or securities subject to Awards then outstanding or subsequently granted, any exercise prices
relating to Awards and any other provision of Awards affected by such change. 
 (2) Certain Other
Adjustments. The Administrator may also make adjustments of the type described in Section 7(b)(1) above to take into account distributions to stockholders other than those provided for in Section 7(a) and 7(b)(1), or any other
event, if the Administrator determines that adjustments are appropriate to avoid distortion in the operation of the Plan and to preserve the value of Awards made hereunder, having due regard for the qualification of ISOs under Section 422 of
the Code and for the performance-based compensation rules of Section 162(m), where applicable. 
 (3) Continuing
Application of Plan Terms. References in the Plan to shares of Stock will be construed to include any stock or securities resulting from an adjustment pursuant to this Section 7. 
 8. LEGAL CONDITIONS ON DELIVERY OF STOCK 
 The
Company will not be obligated to deliver any shares of Stock pursuant to the Plan or to remove any restriction from shares of Stock previously delivered under the Plan until: (i) the Company is satisfied that all legal matters in connection
with the issuance and delivery of such shares have been addressed and resolved; (ii) if the outstanding Stock is at the time of delivery listed on any stock exchange or national market system, the shares to be delivered have been listed or
authorized to be listed on such exchange or system upon official notice of issuance; and (iii) all conditions of the Award have been satisfied or waived. If the sale of Stock has not been registered under the Securities Act of 1933, as amended,
the Company may require, as a condition 

 
to exercise of the Award, such representations or agreements as counsel for the Company may consider appropriate to avoid violation of such Act. The Company
may require that certificates evidencing Stock issued under the Plan bear an appropriate legend reflecting any restriction on transfer applicable to such Stock, and the Company may hold the certificates pending lapse of the applicable restrictions.

 9. AMENDMENT AND TERMINATION 
 The
Administrator may at any time or times amend the Plan or any outstanding Award for any purpose which may at the time be permitted by law, and may at any time terminate the Plan as to any future grants of Awards; provided, that except as
otherwise expressly provided in the Plan the Administrator may not, without the Participant’s consent, alter the terms of an Award so as to affect adversely the Participant’s rights under the Award, unless the Administrator expressly
reserved the right to do so at the time of the Award. Any amendments to the Plan shall be conditioned upon stockholder approval only to the extent, if any, such approval is required by law (including the Code and applicable stock exchange
requirements), as determined by the Administrator. 
 10. OTHER COMPENSATION ARRANGEMENTS 
 The existence of the Plan or the grant of any Award will not in any way affect the Company’s right to Award a person bonuses or other compensation in
addition to Awards under the Plan. 
 11. WAIVER OF JURY TRIAL 
 By accepting an Award under the Plan, each Participant waives any right to a trial by jury in any action, proceeding or counterclaim concerning any rights under (i) the Plan, (ii) the Prior Plan,
(iii) any Award, (iv) any award under the Prior Plan, or (v) any amendment, waiver, consent, instrument, document or other agreement delivered or which in the future may be delivered in connection with any of the foregoing, and agrees
that any such action, proceedings or counterclaim shall be tried before a court and not before a jury. By accepting an Award under the Plan, each Participant certifies that no officer, representative, or attorney of the Company has represented,
expressly or otherwise, that the Company would not, in the event of any action, proceeding or counterclaim described in the first sentence of this Section 11, seek to enforce the foregoing waivers. 

 EXHIBIT A 
 Definition of Terms 
 The following terms, when used in the Plan, will have the meanings and
be subject to the provisions set forth below: 
 “Administrator”: The Compensation Committee, except that the Compensation
Committee may delegate (i) to one or more of its members such of its duties, powers and responsibilities as it may determine; (ii) to one or more officers of the Company the power to grant rights or options to the extent permitted by
Section 157(c) of the Delaware General Corporation Law; (iii) to one or more executive officers of the Company the authority to allocate other Awards among such persons (other than executive officers of the Company) eligible to receive
Awards under the Plan as such delegated officer or officers determine consistent with such delegation; provided, that with respect to any delegation described in this clause (iii) the Compensation Committee (or a properly delegated
member or members of such Committee) shall have authorized the issuance of a specified maximum number of shares of Stock under such Awards and shall have specified the consideration, if any, to be paid therefor; (iv) to the extent permitted by
applicable law, to one or more employee members of the Board the power to make Awards to persons (other than executive officers of the Company) eligible to receive Awards under the Plan; and (v) to such Employees or other persons as it
determines such ministerial tasks as it deems appropriate. Except as expressly provided in the preceding sentence or as otherwise determined by the Compensation Committee, any person to whom the authority to make or allocate Awards has been
delegated pursuant to the preceding sentence shall be deemed to possess, also, the other administrative duties, powers and responsibilities described in Section 3 with respect to such Awards. In the event of any delegation described in the
preceding sentences, the term “Administrator” shall include the person or persons so delegated to the extent of such delegation. 
 “Adoption Date”: May 16, 2006. 
 “Affiliate”: Any corporation or other entity that stands in
a relationship to the Company that would result in the Company and such corporation or other entity being treated as one employer under Section 414(b) or Section 414(c) of the Code, except that in determining eligibility for the grant of a
Stock Option or SAR by reason of service for an Affiliate, Sections 414(b) and 414(c) of the Code shall be applied by substituting “at least 50%” for “at least 80%” under Section 1563(a)(1), (2) and (3) of the Code
and Treas. Regs. § 1.414(c)-2; provided, that to the extent permitted under Section 409A, “at least 20%” shall be used in lieu of “at least 50%”; and further provided, that the lower ownership
threshold described in this definition (50% or 20% as the case may be) shall apply only if the same definition of affiliation is used consistently with respect to all compensatory stock options or stock awards (whether under the Plan or another
plan). The Company may at any time by amendment provide that different ownership thresholds (consistent with Section 409A) apply but any such change shall not be effective for twelve (12) months. 
 “Award”: Any or a combination of the following: 
  

	 	(i)	Stock Options. 

  

	 	(ii)	SARs. 

  

	 	(iii)	Restricted Stock. 

  

	 	(iv)	Unrestricted Stock. 

  

	 	(v)	Stock Units, including Restricted Stock Units. 

  

	 	(vi)	Performance Awards. 

  

	 	(vii)	Awards (other than Awards described in (i) through (vi) above) that are convertible into or otherwise based on Stock. 

 “Board”: The Board of Directors of the Company. 
 “Cause”: In the case of any Participant, any of the following: (i) the continued willful failure of the Participant to perform substantially his or her duties with the Company or any Affiliate
(other than any such failure resulting from the Participant’s incapacity due to disability within the meaning of the Company’s short term disability plan as in effect at the time such determination is made) after ten (10) days prior
written notice from the Board; (ii) the Participant’s conviction of, or plea of guilty or nolo contendere to, a misdemeanor involving theft or embezzlement, or a felony; (iii) the willful engaging by the Participant in illegal
conduct or gross misconduct which is demonstrably and materially injurious to the Company or any Affiliate; (iv) the breach by the Participant of any nondisclosure or non-solicitation agreement with the Company or any Affiliate; or
(v) such other act, failure to act, condition or event, if any, as may be determined by the Administrator at or prior to the time of grant of an Award. Notwithstanding the foregoing, if the Participant is party to an employment or severance
agreement with the Company that contains a definition of cause, such definition shall apply (in the case of such Participant) in lieu of the definition set forth in the preceding sentence. 
 “Change in Control”: Any of the following: (i) the members of the Board at the beginning of any consecutive twenty-four
(24) calendar month period (the “Incumbent Directors”) cease at any time during such period for any reason other than due to 

 
death, Disability or Retirement (in the event of a member’s death, Disability or Retirement, such member shall be deemed to continue as an Incumbent
Director until such member’s seat on the Board is filled) to constitute at least a majority of the members of the Board, provided that any director whose election or nomination for election by the Company’s stockholders was approved by a
vote of at least a majority of such Incumbent Directors shall be treated as an Incumbent Director; (ii) any “person” including a “group” (as such terms are used in Sections 13(d) and 14(d)(2) of The Securities Exchange Act
of 1934, as amended (the “1934 Act”), but excluding the Company, its affiliates, any employee benefit plan of the Company or any affiliate, and an underwriter temporarily holding securities pursuant to an offering of such securities) is or
becomes the “beneficial owner” (as defined in Rule 13(d)(3) under the 1934 Act), directly or indirectly, of securities of the Company representing 35% or more of the combined voting power of the Company’s then outstanding securities,
except this provision shall not be applicable if the Company, in connection with raising capital or making an acquisition (including through the issuance of debt or other securities which are convertible into securities with voting power),
voluntarily agrees to issue to a “person” or a “group” (as defined above) in such a transaction, securities aggregating (when combined with securities owned by such person or group immediately prior to such transaction) 35% or
more, but less than a majority, of the combined voting power of the Company’s then outstanding securities (but this exception shall not apply to any subsequent transfer, except to the extent agreed to by the Company, in writing, at the time
such securities are issued); (iii) the consummation of a merger, consolidation, share exchange or similar form of corporate transaction involving the Company or any affiliate that requires the approval of the Company’s stockholders
(excluding a corporate transaction involving solely the Company and its affiliates) (a “Business Combination”), unless the stockholders immediately prior to such Business Combination own more than 50% of the total voting power of the
successor corporation resulting from such Business Combination or a majority of the board of directors of the successor corporation were Incumbent Directors immediately prior to such Business Combination; (iv) the stockholders of the Company
approve a sale of all or substantially all of the Company’s assets and such sale is consummated; or (v) the stockholders of the Company approve a plan of complete liquidation or dissolution of the Company. Notwithstanding the foregoing, to
the extent any amount constituting “nonqualified deferred compensation” subject to Section 409A would become payable under an Award by reason of a Change in Control, it shall become payable only if the event or circumstances
constituting the Change in Control would also constitute a change in the ownership or effective control of the Company, or a change in the ownership of a substantial portion of the Company’s assets, within the meaning of subsection (a)(2)(A)(v)
of Section 409A and the guidance thereunder. 
 “Code”: The U.S. Internal Revenue Code of 1986 as from time to time
amended and in effect, or any successor statute as from time to time in effect. 
 “Compensation Committee”: The
Compensation Committee of the Board. 
 “Company”: The Hanover Insurance Group, Inc., a corporation established under the
laws of the State of Delaware. 
 “Covered Transaction”: Any of (i) a consolidation, merger, or similar transaction or
series of related transactions, including a sale or other disposition of stock, in which the Company is not the surviving corporation or which results in the acquisition of all or substantially all of the Company’s then outstanding common stock
by a single person or entity or by a group of persons and/or entities acting in concert, (ii) a sale or transfer of all or substantially all the Company’s assets, or (iii) a dissolution or liquidation of the Company. Where a Covered
Transaction involves a tender offer that is reasonably expected to be followed by a merger described in clause (i) (as determined by the Administrator), the Covered Transaction shall be deemed to have occurred upon consummation of the tender
offer. 
 “Disability”: With respect to members of the Board, the inability to engage in any substantial gainful activity by
reason of a medically determinable physical or mental impairment which can be expected to result in death or which can be expected to last for a continuous period of not less than twelve (12) months. 
 “Employee”: Any person who is employed by the Company or an Affiliate. 
 “Employment”: A Participant’s employment or other service relationship with the Company and its Affiliates. Employment will be
deemed to continue, unless the Administrator expressly provides otherwise, so long as the Participant is employed by, or otherwise is engaged by the Company or its Affiliates in a capacity described in Section 5. If a Participant’s
employment or other service relationship is with an Affiliate and that entity ceases to be an Affiliate, the Participant’s Employment will be deemed to have terminated when the entity ceases to be an Affiliate unless the Participant transfers
Employment to the Company or its remaining Affiliates. 
 “Full Value Award”: An Award other than a Stock Option.

 “ISO”: A Stock Option intended to be an “incentive stock option” within the meaning of Section 422 of the
Code. Each option granted pursuant to the Plan will be treated as providing by its terms that it is to be a non-incentive stock option unless, as of the date of grant, it is expressly designated as an ISO. 
 “Participant”: A person who is granted an Award under the Plan. 

 “Performance Award”: An Award subject to Performance Criteria. The Committee in its
discretion may grant Performance Awards that are intended to qualify for the performance-based compensation exception under Section 162(m) and Performance Awards that are not intended so to qualify. 
 “Performance Criteria”: Specified criteria, other than the mere continuation of Employment or the mere passage of time, the satisfaction
of which is a condition for the grant, exercisability, vesting or full enjoyment of an Award. For purposes of Awards that are intended to qualify for the performance-based compensation exception under Section 162(m), a Performance Criterion
will mean an objectively determinable (whether by reference to audited financials, ratings or surveys prepared by an unaffiliated rating or survey service, or otherwise) measure of performance relating to any or any combination of the following
(measured either absolutely or by reference to an index or indices and determined either on a consolidated basis or, as the context permits, on a divisional, subsidiary, line of business, project, individual or geographical basis or in combinations
thereof): sales; revenues; assets; expenses; earnings before or after deduction for all or any portion of interest, taxes, depreciation, amortization, or capital gains or losses, determined on the basis of operations, continuing operations or
otherwise and on an aggregate or per share basis; return on equity, investment, capital or assets; one or more operating ratios; borrowing levels, leverage ratios or credit rating; market share; productivity improvements; capital expenditures; cash
flow; stock price; stockholder return; economic value added; increase in surplus; sales of particular products or services; development of business goals; customer acquisition, satisfaction or retention; service levels or standards; leadership
effectiveness; business development; or the occurrence of, or participation in the negotiation or effectuation of, any of: acquisitions and divestitures (in whole or in part), joint ventures and strategic alliances, spin-offs, split-ups and the
like, reorganizations, or recapitalizations, restructurings, financings (issuance of debt or equity) or refinancings. A Performance Criterion and any targets with respect thereto determined by the Administrator need not be based upon an increase, a
positive or improved result or avoidance of loss. To the extent consistent with the requirements for satisfying the performance-based compensation exception under Section 162(m), the Administrator may provide in the case of any Award intended
to qualify for such exception that one or more of the Performance Criteria applicable to such Award will be adjusted in an objectively determinable manner to reflect events (for example, but without limitation, unusual or infrequent events, realized
investment gains or losses, acquisitions or dispositions, reserve changes, catastrophes, accounting changes and restructuring expenses) occurring during the performance period that affect the applicable Performance Criterion or Criteria. 

“Plan”: The Hanover Insurance Group, Inc. 2006 Long-Term Incentive Plan as from time to time amended and in effect. 
 “Prior Plan”: The Allmerica Financial Corporation Amended Long-Term Stock Incentive Plan as in effect prior to May 16, 2006.

 “Restricted Stock”: Stock subject to restrictions requiring that it be redelivered or offered for sale to the Company if
specified conditions are not satisfied. 
 “Restricted Stock Unit”: A Stock Unit that is, or as to which the delivery of
Stock or cash in lieu of Stock is, subject to the satisfaction of specified performance or other vesting conditions. 
 “Retirement”: With respect to members of the Board, retirement pursuant to a retirement policy then in effect for members of the Board. 
 “Section 162(m)”: Section 162(m) of the Code. 
 “Section 409A”:
Section 409A of the Code. 
 “Share Limit”: The limit described in Section 4(a). 
 “SAR”: A right entitling the holder upon exercise to receive an amount (payable in shares of Stock of equivalent value) equal to the
excess of the fair market value of the shares of Stock subject to the right over the fair market value of such shares at the date of grant. 
 “Stock”: Common Stock of the Company, par value $ 0.01 per share. 
 “Stock Option”: An
option entitling the holder to acquire shares of Stock upon payment of the exercise price. 
 “Stock Unit”: An unfunded and
unsecured promise, denominated in shares of Stock, to deliver Stock or cash measured by the value of Stock in the future. 
 “Unrestricted Stock”: Stock not subject to any restrictions under the terms of the Award.

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